UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 10-K

[X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934 (NO FEE REQUIRED)

FOR THE FISCAL YEAR ENDED DECEMBER 31, 1997

[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934 (NO FEE REQUIRED)

FOR THE TRANSITION PERIOD FROM ___________ TO _____________

COMMISSION FILE NUMBER: 0-13857

NOBLE DRILLING CORPORATION

(Exact name of registrant as specified in its charter)

       DELAWARE                                       73-0374541
------------------------            --------------------------------------------
(State of incorporation)               (I.R.S.  employer identification number)

10370 RICHMOND AVENUE, SUITE 400, HOUSTON, TEXAS 77042
(Address of principal executive offices) (Zip Code)

REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (713) 974-3131

Securities registered pursuant to Section 12(b) of the Act:

COMMON STOCK, PAR VALUE $.10 PER SHARE       NEW YORK STOCK EXCHANGE
    9 1/8% SENIOR NOTES DUE 2006             NEW YORK STOCK EXCHANGE
   PREFERRED STOCK PURCHASE RIGHTS           NEW YORK STOCK EXCHANGE
  ---------------------------------   -----------------------------------------
       Title of each class            Name of each exchange on which registered

Securities registered pursuant to Section 12(g) of the Act:

NONE

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes [X] No [ ]

Indicate by check mark if disclosure of delinquent filers pursuant to

Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [ ]

Aggregate market value of Common Stock held by nonaffiliates as of March 9, 1998: $3,557,930,459

Number of shares of Common Stock outstanding as of March 9, 1998: 131,342,070

DOCUMENTS INCORPORATED BY REFERENCE

Listed below are documents parts of which are incorporated herein by reference and the part of this report into which the document is incorporated:

(1) Proxy statement for the 1998 annual meeting of stockholders-

Part III


TABLE OF CONTENTS

                                                                                                        PAGE
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PART      ITEM 1.     BUSINESS........................................................................ 1
 I                General............................................................................. 1
                  Business Strategy................................................................... 1
                  Development of Business During 1997................................................. 2
                       Modifications and Upgrades..................................................... 2
                       Redeployments.................................................................. 3
                       Asset Rationalization Program.................................................. 3
                  Drilling Contracts.................................................................. 3
                  Offshore Drilling Operations........................................................ 4
                       International Contract Drilling................................................ 4
                       Domestic Contract Drilling..................................................... 5
                       Labor Contracts................................................................ 5
                  Turnkey Drilling and Engineering Services........................................... 5
                  Competition and Risks............................................................... 5
                  Governmental Regulation and Environmental Matters................................... 7
                  Employees........................................................................... 7
                  Financial Information about Foreign and Domestic Operations......................... 8
          ITEM 2.     PROPERTIES...................................................................... 8
                  Drilling Fleet...................................................................... 8
                       Semisubmersibles............................................................... 8
                       Dynamically Positioned Drillships.............................................. 9
                       Jackup Rigs.................................................................... 8
                       Submersibles................................................................... 9
                  Drilling Fleet...................................................................... 10
                  Facilities.......................................................................... 11
          ITEM 3.     LEGAL PROCEEDINGS............................................................... 11
          ITEM 4.     SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS............................. 12
          EXECUTIVE OFFICERS OF THE REGISTRANT........................................................ 12
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PART      ITEM 5.     MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS........... 13
 II       ITEM 6.     SELECTED FINANCIAL DATA......................................................... 14
          ITEM 7.     MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
                      OPERATIONS...................................................................... 15
          ITEM 7A.    QUANTITATIVE AND QUALITATIVE DISCLOSURES
                      ABOUT MARKET RISK............................................................... 23
          ITEM 8.     FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA..................................... 23
          ITEM 9.     CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON
                      ACCOUNTING AND FINANCIAL DISCLOSURE............................................. 49
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PART      ITEM 10.    DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.............................. 49
III       ITEM 11     EXECUTIVE COMPENSATION.......................................................... 49
          ITEM 12.    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.................. 49
          ITEM 13.    CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.................................. 49
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PART      ITEM 14.    EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON
IV                    FORM 8-K........................................................................ 50
          SIGNATURES.................................................................................. 51


FORM 10-K

This report on Form 10-K includes "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and
Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical facts included in this Form 10-K, including, without limitation, statements contained in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations", regarding the Company's financial position, business strategy, plans and objectives of management of the Company for future operations, industry conditions, and indebtedness covenant compliance, are forward-looking statements. Although the Company believes that the expectations reflected in such forward-looking statements are reasonable, it can give no assurance that such expectations will prove to have been correct. Important factors that could cause actual results to differ materially from the Company's expectations include, but are not limited to, volatility of oil and gas prices, increasingly heavy backlogs for equipment and services required to complete on schedule major shipyard refurbishment and conversion projects which are either planned or in progress, potential decrease in demand for drilling services in the U.S. Gulf of Mexico where the Company has a concentration of drilling rigs (which could also result in competitors moving their rigs to other markets where the Company has drilling rigs), risks associated with turnkey drilling operations, intense competition in the drilling industry, political and economic conditions in international markets (including Nigeria, Venezuela and India), natural disasters (such as hurricanes), operational risks (such as blowouts, fires and loss of production), early termination provisions generally found in the Company's drilling contracts, limitations on insurance coverage, and requirements and potential liability imposed by governmental regulation of the drilling industry (including environmental regulation).

PART I

ITEM 1. BUSINESS

GENERAL

Noble Drilling Corporation is a leading provider of diversified services for the oil and gas industry worldwide. The Company's activities include offshore drilling services, turnkey drilling services and engineering and asset management services. The Company's drilling fleet is broadly diversified, allowing it to work in a variety of operating conditions.

Noble Drilling Corporation ("Noble Drilling") was organized as a Delaware corporation in 1939. Noble Drilling and its predecessors have been engaged in the contract drilling of oil and gas wells for others domestically since 1921 and internationally during various periods since 1939. As used herein, unless otherwise required by the context, the term "Noble Drilling" refers to Noble Drilling Corporation and the term "Company" refers to Noble Drilling and its consolidated subsidiaries.

BUSINESS STRATEGY

The Company's business strategy has been to actively expand its international and offshore capabilities through acquisitions, rig upgrades and modifications, and by redeploying assets in important geological areas. In recent years the Company has included within its strategic objectives a focus on increasing the number of rigs in its fleet capable of drilling in deeper water depths.

The offshore contract drilling industry has, in recent years, experienced a series of asset sales and consolidations among drilling contractors, and the Company expects this trend to continue as drilling contractors position themselves strategically in the market. The Company, from time to time, has discussions with third parties regarding asset acquisitions or business combinations and intends to continue to consider business opportunities that it believes promote its business strategy.

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DEVELOPMENT OF BUSINESS DURING 1997

MODIFICATIONS AND UPGRADES

EVA-4000(TM) SEMISUBMERSIBLE CONVERSIONS

The Company has pursued an extensive rig modification, refurbishment and upgrade program in recent years, which continued in 1997. In response to the growth in worldwide demand for drilling rigs capable of operating in water depths greater than 5,000 feet, the Company is upgrading certain of its shallow water submersible rigs into Economic Value Advantage ("EVA-4000(TM)") design semisubmersible rigs. The first EVA-4000(TM) conversion, the Noble Paul Romano, has been contracted to Shell Deepwater Development Inc. ("Shell"), an affiliate of Shell Oil Company, for five years. The Noble Paul Romano is expected to be available for work in the second half of 1998. The second EVA-4000(TM) conversion, the Noble Paul Wolff, will be capable of operating in up to 8,900 feet of water and has been contracted to Petroleo Brasiliero S.A. ("Petrobras") for six years. The Noble Paul Wolff is expected to be available for work in late 1998. The Noble Amos Runner has been contracted to a consortium of three operators, Marathon Oil Company, Oryx Energy Company and Murphy Exploration and Production Company. The initial term of the drilling contract is five years, with options to extend at mutually agreed terms and conditions. The Noble Amos Runner will be capable of operating in up to 6,600 feet of water and is expected to be available for work in the second quarter of 1999.

The Company has entered into letters of intent for two additional EVA-4000(TM) conversions. The Noble Jim Thompson will be contracted to Shell for work in the Gulf of Mexico. The unit will be capable of operating in water depths up to 6,000 feet in a moored configuration. The initial term of the drilling contract will be for three years with options to Shell to extend the contract. The conversion is expected to be completed in late 1998 or the first quarter of 1999. The Noble Max Smith will be contracted for work in the Gulf of Mexico by two operators, Amerada Hess Corporation and Union Pacific Resources Company, and will be capable of drilling in water depths up to 6,000 feet in a moored configuration. The initial term of the drilling contract will be for five years with options to the operators to extend. Completion of the conversion and delivery of the unit is expected for the third quarter of 1999.

OTHER SEMISUBMERSIBLE CONVERSIONS

The Company has entered into a letter of intent with two operators to utilize the Noble Homer Ferrington in the Gulf of Mexico. The Noble Homer Ferrington (formerly the Shelf 4) is a semisubmersible rig hull purchased in late 1996. The rig will be capable of drilling in water depths up to 6,000 feet in a moored configuration. The initial term of the drilling contract will be for five years. The Company will be required to make significant capital expenditures to refurbish and upgrade the rig. Completion of the upgrade and delivery of the unit is expected for the fourth quarter of 1999.

Additionally, the Company has three other submersible rigs that it believes could be converted to semisubmersibles. Any such conversion would require significant capital expenditures. The Company does not plan to make a conversion unless a long-term contract for the semisubmersible is secured.

OTHER SIGNIFICANT UPGRADES

Other significant upgrades include the Noble Bill Jennings and Noble Leonard Jones, which were upgraded from independent leg slot rigs to cantilever drilling units with proprietary extended reach cantilever (ERC(TM)) design and water depth ratings of 390 feet. The Noble Bill Jennings began working in October 1997, and the Noble Leonard Jones began working in January 1998. In addition, the refurbishment of the Noble Al White (formerly the Neddrill Trigon) for an 18-month contract in the Norwegian sector of the North Sea was completed in the fourth quarter of 1997. The Company has completed the reactivation of two idle submersible rigs, the Noble Joe Alford and Noble Lester Pettus, and a third submersible, the Noble Fri Rodli, is scheduled to be completed in the first quarter of 1998. The installation and testing of blowout preventers and related control systems on the Noble Roger Eason (formerly the Neddrill 2) and the Noble Muravlenko have been delayed pending the delivery of key equipment components. The Company expects that these components will be installed on the two drillships during the first half of 1998.

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See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations-Liquidity and Capital Resources" for a discussion of capital expenditures.

REDEPLOYMENTS

From time to time, the Company has strategically redeployed certain drilling units in its fleet, primarily from the Gulf of Mexico to other drilling markets worldwide, in order to position assets in important geological areas. During 1997, the Noble Lewis Dugger and Noble Sam Noble were deployed from the U.S. Gulf of Mexico to the Bay of Campeche; the Noble Al White was deployed from Argentina to the North Sea; and the Noble Muravlenko was upgraded and deployed to Brazil. The Noble Kenneth Delaney has completed a refurbishment in Sharjah, UAE and is being deployed to Qatar. Additionally, the Company has a letter of intent to mobilize the Noble John Sandifer from the U.S. Gulf of Mexico to the Bay of Campeche in the first half of 1998 for a two-year contract.

ASSET RATIONALIZATION PROGRAM

Consistent with the Company's focus on enhancing the deepwater capability of its fleet, on May 7, 1997, the Company completed the sale of its 12 mat supported jackup rigs for $268,818,000 in cash. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Results of Operations Significant 1997 Events."

DRILLING CONTRACTS

Each of the Company's drilling units is employed under an individual contract. Although the final terms of such contracts are the result of negotiations between the Company and its customers, many contracts are awarded based upon competitive bidding. The Company's drilling contracts generally contain the following terms:

o a term extending over a specific period of time or the period necessary to drill one or more wells (in general, the Company seeks to have a reasonable balance of short- and long-term contracts to minimize the downside impact of a decline in the market, while obtaining the benefit of increasing market prices in a rising market);

o early termination by the customer without cause and extension options to drill additional wells, in each case, generally exercisable by the customer upon advance notice to the Company;

o early termination by the customer if the unit is lost or destroyed, if operations are suspended for a specified period of time due to breakdown of major equipment or if operations are suspended for a specified period of time due to "force majeure" events beyond the control of the Company and the customer;

o payment of compensation to the Company (generally in U.S. dollars) on a "daywork" basis, under which the Company receives a fixed amount per day that the drilling unit is operating under contract, with lower rates or no compensation payable during periods of equipment breakdown and repair or adverse weather or in the event operations are interrupted by other conditions, some of which may be beyond the Company's control; and

o payment by the Company of the operating expenses of the drilling unit, including labor costs and the cost of incidental supplies.

Most contracts allow the Company to recover its mobilization and demobilization costs associated with moving a drilling unit from one location to another. If market conditions required the Company to bear these costs, the Company's operating margins would be reduced. Market conditions prevailing in 1997 and year to date in 1998 have permitted the Company to recover its mobilization and demobilization costs to move a unit long distances between operating areas. For shorter moves such as "field moves", the Company's customers have generally agreed to bear the costs of moving the unit and pay the Company a reduced dayrate or "move rate" while the unit is being moved.

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The Company, through Triton Engineering Services Company and its subsidiaries, also participates in "turnkey" contracts (see "Item 1. Business - Turnkey Drilling and Engineering Services"). The risk of loss to the Company is generally higher with respect to the Company's turnkey drilling operations than it is for daywork contract drilling operations.

OFFSHORE DRILLING OPERATIONS

The Company's offshore contract drilling operations, which accounted for approximately 66 percent and 63 percent of operating revenues for the years ended December 31, 1997 and 1996, respectively, are conducted worldwide. The Company's offshore drilling fleet consists of 45 units. See "Item 2. Properties
- Drilling Fleet." The Company's principal regions of offshore contract drilling operations include the North Sea, the Gulf of Mexico, Africa, South America, the Middle East and India. In 1997, no single customer accounted for more than 10 percent of the Company's total operating revenues.

INTERNATIONAL CONTRACT DRILLING

The Company's international offshore contract drilling operations are conducted in the North Sea, Mexico, Africa, South America, the Middle East and India. Offshore contract drilling services from international sources accounted for approximately 74 percent and 62 percent of the Company's total offshore contract drilling services revenues for the years ended December 31, 1997 and 1996, respectively. In 1997, approximately 54 percent of the Company's international offshore contract drilling services revenues was derived from contracts with major oil and gas companies, 45 percent from contracts with government-owned companies and the balance from contracts with independent operators.

The Company's international contract drilling fleet consisted of 30 rigs at January 31, 1998, of which 29 were working under contract and one was being deployed to begin operating under a new contract.

The Company has six jackup rigs located along the west coast of Africa. The jackup rigs are contracted to major oil companies for terms extending through dates that range from March to December 1998.

The Company has four jackup rigs located in Venezuela. The Noble Dick Favor is under a long-term contract that terminates in the year 2000. The Noble Charles Copeland is contracted through August 1998, and the Company expects this contract to be renewed for an additional 12 months. The Noble Earl Frederickson has been contracted to drill one well, plus additional wells at the option of the operator, in the first half of 1998. This rig is earning a standby rate until the commencement of drilling operations on the initial well. The contract for the Noble Carl Norberg expired in March 1998. This rig is being demobilized out of Venezuela, a portion of the cost of which is being paid by the former operator, and currently is available for contract.

The Company has three jackup rigs located in Qatar under contracts extending through dates ranging from October 1998 to October 1999. The Noble Kenneth Delaney, which operated in India in 1997, has completed a refurbishment in Sharjah, UAE and is being deployed to Qatar to begin operating under a three-year contract.

The Company has two jackup rigs working in India. The Noble Ed Holt is under a bareboat charter agreement that expires in March 1998. The rig will be moved to the shipyard upon expiration of the contract for upgrade prior to commencing a two-year contract. The Noble Jimmy Puckett is under a bareboat charter agreement until December 1998.

The Company has three jackup rigs operating in the Bay of Campeche, Mexico under contracts extending through dates ranging from October 1998 to May 1999. All of the rigs have been contracted by Petroleos de Mexico ("Pemex"). Additionally, the Company has a letter of intent to mobilize the Noble John Sandifer from the U.S. Gulf of Mexico to the Bay of Campeche in the first half of 1998 for a two-year contract with Pemex.

The Company has three drillships operating offshore Brazil for Petrobras under contracts extending through dates ranging from October 2001 to March 2003.

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The Company has seven jackup rigs and one semisubmersible rig working in the North Sea under contracts extending through dates ranging from March 1998 to July 2000. The Noble George Savageau is under an agreement which expires in March 1998. The rig will be moved to the shipyard upon expiration of the contract for upgrade prior to commencing an 18-month contract.

DOMESTIC CONTRACT DRILLING

The Company's domestic offshore contract drilling fleet consisted of 15 rigs at January 31, 1998, of which nine were working under contracts and six were being upgraded, modified and/or refurbished.

In 1997, approximately 69 percent of the Company's domestic offshore contract drilling revenues was derived from contracts with major oil and gas companies and the remaining 31 percent was derived from contracts with independent operators.

LABOR CONTRACTS

The Company's offshore operations also include labor contracts for drilling and workover activities covering 14 rigs operating in the U.K. North Sea. These rigs are not owned or leased by the Company. Under its labor contracts, the Company provides the personnel necessary to manage and perform the drilling operations from drilling platforms owned by the operator. The contracts are generally renewable no more frequently than on an annual basis. After drilling operations are completed, workover operations usually become an important element of each platform's activity. Drilling contractor crews will, therefore, typically remain on the platform until a field is depleted by production.

Additionally, the Company maintains and operates the drilling equipment on the concrete, gravity-based structure known as the Hibernia Project offshore Nova Scotia in Eastern Canada under a long-term contract for Hibernia Management and Development Company Ltd. ("Hibernia"). Drilling operations from the structure commenced in the third quarter of 1997. The Company's five-year contract with Hibernia extends through August 2002 with an option to Hibernia for a five-year extension.

TURNKEY DRILLING AND ENGINEERING SERVICES

Through its wholly owned subsidiary, Triton Engineering Services Company ("Triton"), the Company provides turnkey drilling, drilling project management, drilling and completion planning and design, specialized drilling tools and services, and contract engineering and consulting manpower. Turnkey drilling, Triton's major service, involves the coordination of all equipment, materials, services and management to drill a well to a specified depth, for a fixed price. Under turnkey drilling contracts, Triton bears the financial risk of delays in the completion of the well. In providing its services, Triton can use drilling rigs owned either by the Company or by a third party, depending on availability. The drilling of a turnkey well is generally completed within 30 to 50 days. Triton completed 34 wells in 1997 compared to 28 wells in 1996. Revenues from turnkey drilling services represented 25 percent and 22 percent of consolidated operating revenues for the years ended December 31, 1997 and 1996, respectively.

The Company provides engineering services relating primarily to the design of drilling equipment for offshore development and production services and to the recertification of oilfield equipment. The Company works, on a contract basis, with operators and prime construction contractors of drilling and production platforms in the design of drilling equipment configurations aimed at optimizing the operational efficiency of developmental drilling by maximizing platform space utilization and load capability.

COMPETITION AND RISKS

The contract drilling industry is a highly competitive and cyclical business characterized by high capital and maintenance costs. Management of the Company believes that competition for drilling contracts will continue to be intense for the foreseeable future. Certain competitors may have access to greater financial resources than the Company.

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Competition in contract drilling involves numerous factors, including price, rig availability and suitability, the experience of the workforce, efficiency, condition of equipment, operating integrity, reputation, industry standing and customer relations. Although price is a major consideration in most markets, especially with respect to domestic drilling, the increasing demand for, and limited supply of, deepwater units has made rig availability and suitability a principal consideration in recent periods. The Company believes it competes favorably with respect to all these factors. Competition is primarily on a regional basis and may vary significantly by region at a particular time. Demand for offshore drilling equipment is also dependent on the exploration and development programs of oil and gas producers, which are in turn influenced by the financial condition of such producers, by general economic conditions and prices of oil and gas, and, from time to time, by political considerations and policies.

The Company follows a policy of keeping its equipment well maintained and technologically competitive. However, its equipment could be made obsolete by the development of new techniques and equipment. In addition, industry-wide shortages of supplies, services, skilled personnel and equipment necessary to conduct the Company's business, such as blowout preventers and drill pipe, occur from time to time. There can be no assurance that any such shortages experienced in the past would not occur again or that any such shortages, to the extent currently existing, will not continue or worsen in the future.

The offshore contract drilling industry has experienced a series of consolidations and acquisitions among drilling contractors as such contractors have positioned themselves strategically in the market. The Company, from time to time, has discussions with third parties regarding asset acquisitions or business combinations and intends to continue to consider business opportunities that it believes promote its business strategy.

The Company's operations are materially dependent upon the levels of activity in offshore world oil and U.S. natural gas exploration, development and production. Such activity levels are affected by both short-term and long-term trends in oil and natural gas prices. In recent years, crude oil and natural gas prices, the expenditures by oil and gas companies for exploration and production, and the availability of drilling rigs, and therefore the level of offshore drilling and exploration activity, have been extremely volatile. The domestic price of U.S. benchmark crude oil has recently approached a four-year low. Weakness and uncertainty in the demand for and price of natural gas in the Gulf of Mexico, from time to time, contributes to decreased exploration and production activities. Demand for drilling services outside the United States, excluding the North Sea, has been less volatile in recent years, but remains dependent on a variety of political and economic factors beyond the Company's control, including worldwide demand for oil and natural gas, the ability of the Organization of Petroleum Exporting Countries ("OPEC") to set and maintain production levels and pricing, the level of production of non-OPEC countries and the policies of the various governments regarding exploration and development of their oil and natural gas reserves.

If the domestic price of natural gas decreases, the Company's dayrates on new contracts and utilization rates in the U.S. Gulf could be adversely affected. Similarly, if the prices of crude oil or natural gas decrease in other world markets, where the Company's international jackup rigs principally compete, its rates there could be adversely affected. The Company can predict neither the future level of demand for its drilling services nor the future conditions in the offshore contract drilling industry.

The Company's operations are subject to the many hazards inherent in the drilling business, including blowouts, cratering, fires, and collisions or groundings of offshore equipment, which could cause substantial damage to the environment. In addition, the Company's operations are subject to damage or loss from adverse weather and seas. These hazards could cause personal injury and loss of life, suspend drilling operations or seriously damage or destroy the property and equipment involved and, in addition to environmental damage, could cause substantial damage to producing formations and surrounding areas. Although the Company maintains insurance against many of these hazards, such insurance is subject to substantial deductibles and provides for premium adjustments based on claims. It also excludes certain matters from coverage, such as loss of earnings on certain rigs. Also, while the Company generally obtains indemnification from its customers for environmental damage with respect to offshore drilling, such indemnification is generally only in excess of a specified amount, which typically ranges from $100,000 to $250,000.

In the case of turnkey drilling operations, the Company maintains insurance against pollution and environmental damage in amounts ranging from $5,000,000 to $50,000,000 depending on location, subject to

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self-insured retentions of $25,000 to $1,000,000. Under turnkey drilling contracts, Triton generally assumes the risk of pollution and environmental damage, but on occasion receives indemnification from the customer for environmental and pollution liabilities in excess of Triton's pollution insurance coverage. Further, Triton is not insured against certain drilling risks that could result in delays or nonperformance of a turnkey drilling contract, although it generally maintains insurance against delays related to loss of well control. Triton typically obtains contractual indemnification from the drilling contractors that provide the rigs for Triton's turnkey drilling operations for pollution arising from certain acts of such contractors.

The Company's international operations are also subject to certain political, economic and other uncertainties including, among others, risks of war and civil disturbances, expropriation, nationalization, renegotiation or modification of existing contracts, taxation policies, foreign exchange restrictions, international monetary fluctuations and other hazards arising out of foreign governmental sovereignty over certain areas in which the Company conducts operations. The Company has sought to obtain, where economic, insurance against certain political risks. However, there can be no assurance that such insurance would be available to the Company or, if available, would cover all losses that the Company may incur in respect of foreign operations.

GOVERNMENTAL REGULATION AND ENVIRONMENTAL MATTERS

Many aspects of the Company's operations are affected by domestic and foreign political developments and are subject to numerous governmental regulations that may relate directly or indirectly to the contract drilling industry. The regulations applicable to the Company's operations include certain provisions that regulate the discharge of materials into the environment or require remediation of contamination, under certain circumstances. Usually these environmental laws and regulations impose "strict liability," rendering a person liable without regard to negligence or fault on the part of such person. Such environmental laws and regulations may expose the Company to liability for the conduct of, or conditions caused by, others, or for acts of the Company that were in compliance with all applicable laws at the time such acts were performed.

The U.S. Oil Pollution Act of 1990 ("OPA `90") and the subsequent regulations impose certain additional operational requirements on the Company's domestic offshore rigs and govern liability for leaks, spills and blowouts. Regulations under OPA `90 may increase the level of financial assurance required of owners and operators of rigs in the waters of the United States. The Company monitors these regulations and does not believe that they are likely to have a material adverse effect on the Company's financial condition or results of operations.

The Company has made and will continue to make expenditures to comply with environmental requirements. The Company has not to date expended material amounts in connection with such activities and does not believe that compliance with such requirements will have a material adverse effect upon its capital expenditures, results of operations or competitive position. Although such requirements do have a substantial impact upon the energy and energy services industries, generally they do not appear to affect the Company any differently or to any greater or lesser extent than other companies in the energy services industry.

The modification of existing laws or regulations or the adoption of new laws or regulations curtailing exploratory or development drilling for oil and gas for economic, environmental or other reasons could materially and adversely affect the Company's operations by limiting drilling opportunities.

EMPLOYEES

At December 31, 1997, the Company had approximately 2,781 employees, of which 58 percent were engaged in international operations and 42 percent were engaged in domestic operations. Over many years, the Company has developed and maintained a well-trained and experienced workforce.

Depending on location, some employees of Noble Drilling (Nederland) B.V., a subsidiary of the Company, are covered by a labor agreement or are represented by labor unions. The Company is not a party to any collective bargaining agreements that are material to the Company. The Company considers its employee relations to be satisfactory.

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Demand for field personnel has increased significantly due to increased levels of offshore drilling activity in recent periods. A continued increase in demand for oilfield services could make it more difficult to retain and recruit qualified rig crew members without significant increases in compensation.

FINANCIAL INFORMATION ABOUT FOREIGN AND DOMESTIC OPERATIONS

Information regarding operating revenues, operating income and loss, and identifiable assets attributable to each of the Company's geographic areas of operations for the last three fiscal years is presented in Note 13 of Notes to Consolidated Financial Statements included elsewhere herein.

ITEM 2. PROPERTIES

DRILLING FLEET

The Company's offshore drilling rig fleet at January 31, 1998 consisted of 45 units comprising seven semisubmersibles (including five submersibles that will be converted to EVA-4000(TM) semisubmersibles), three drillships, 32 jackup rigs and three submersibles. The rig counts include one drillship in which the Company has a 41 percent interest through a joint venture arrangement, one jackup rig in which the Company has a 50 percent interest through a joint venture arrangement and one rig currently active as a submersible prior to its scheduled conversion to an EVA-4000(TM) semisubmersible commencing in 1998. Each type of rig is described further below. There are several factors that determine the type of rig most suitable for a particular job, the more significant of which include the water depth and bottom conditions at the proposed drilling location, whether the drilling is being done over a platform or other structure, and the intended well depth.

SEMISUBMERSIBLES

The Company had seven semisubmersibles (including five submersibles that will be converted to EVA-4000(TM) semisubmersibles) in the fleet at January 31, 1998. Semisubmersibles are floating platforms which, by means of a water ballasting system, can be submerged to a predetermined depth so that a substantial portion of the hull is below the water surface during drilling operations. The Noble Ton van Langeveld maintains its position over the well through the use of a mooring system, is designed to work in water depths of up to 1,500 feet and can drill in many areas where the Company's jackup rigs can also drill. However, semisubmersibles normally require water depth of at least 200 feet in order to conduct operations. Semisubmersibles are typically more expensive to construct and operate than jackup rigs.

DYNAMICALLY POSITIONED DRILLSHIPS

The Company had three dynamically positioned drillships in the fleet at January 31, 1998, including one drillship in which the Company owns a 41 percent interest through a joint venture arrangement. Drillships are ships that are equipped for drilling and are typically self-propelled and move from one location to another under their own power. Drillships are positioned over the well through use of either an anchoring system or a computer controlled thruster system (dynamic positioning). The Company's two wholly owned drillships, the Noble Leo Segerius and Noble Roger Eason, are capable of drilling in water depths up to 4,500 feet and 6,000 feet, respectively. The Noble Muravlenko is capable of drilling in water depths up to 4,000 feet. Drillships are typically more expensive to construct and operate than jackup rigs.

JACKUP RIGS

The Company had 32 jackup rigs in the fleet at January 31, 1998, including one jackup rig in which the Company owns a 50 percent interest through a joint venture arrangement. Jackup rigs are mobile self-elevating drilling platforms equipped with legs which can be lowered to the ocean floor until a foundation is established to support the drilling platform. The rig hull includes the drilling rig, jacking system, crew quarters, loading and unloading facilities, storage areas for bulk and liquid materials, helicopter landing deck and other related equipment. The rig legs may operate independently or have a mat attached to the bottom of them in order to provide a more stable foundation in soft bottom areas. All of the Company's jackup rigs are independent leg cantilevered rigs. A cantilevered jackup has a feature that permits the drilling platform to be extended out from the hull, allowing it to perform drilling or workover operations over pre-existing platforms or structures. Moving a rig to the drill site

8

involves jacking up its legs until the hull is floating on the surface of the water. The hull is then towed to the drill site by tugs and the legs are jacked down to the ocean floor. The jacking operation continues until the hull is raised out of the water and drilling operations are conducted with the hull in its raised position. The Company's jackup rigs are capable of drilling to a maximum depth of 25,000 feet in water depths ranging between 8 and 390 feet, depending on the jackup rig.

SUBMERSIBLES

The Company had three submersibles in the fleet at January 31, 1998. Submersibles are mobile drilling platforms which are towed to the drill site and submerged to drilling position by flooding the lower hull until it rests on the sea floor, with the upper deck above the water surface. The Company's submersibles are capable of drilling to a maximum depth of 30,000 feet in water depths ranging between 12 and 100 feet, depending on the submersible.

The following table sets forth certain information concerning the Company's drilling rig fleet at January 31, 1998. The table does not include 14 rigs owned by operators for which the Company had labor contracts as of January 31, 1998. Unless otherwise indicated, the Company owns and operates the rigs included in the table.

9

DRILLING FLEET

                                                           YEAR       WATER    MAXIMUM
                                                         BUILT OR     DEPTH    DRILLING
         NAME                         MAKE              REBUILT (1)   RATING    DEPTH     LOCATION          STATUS (2)
         ----                         ----              -----------   ------    -----     --------          ----------
                                                                      (FEET)    (FEET)

SEMISUBMERSIBLES - 7
Noble Paul Wolff (3)             Noble EVA 4000(TM)      1998    R     8,900    30,000    U.S. Gulf         Shipyard
Noble Amos Runner (3)            Noble EVA 4000(TM)      1999    R     6,600    25,000    U.S. Gulf         Shipyard
Noble Paul Romano (3)            Noble EVA 4000(TM)      1998    R     6,000    30,000    U.S. Gulf         Shipyard
Noble Jim Thompson (3)(4)        Noble EVA 4000(TM)      1999    R     6,000    25,000    U.S. Gulf         Shipyard
Noble Max Smith (4)(6)           Noble EVA 4000(TM)      1999    R     6,000    25,000    U.S. Gulf         Active
Noble Homer Ferrington (4)       Friede & Goldman 9500   1999    R     6,000    20,000    U.S. Gulf         Shipyard
                                  Enhanced Pacesetter
Noble Ton van Langeveld (3)(5)   Offshore Co. SCP III    1991    R     1,500    25,000    U.K.              Active

DYNAMICALLY POSITIONED
DRILLSHIPS - 3
Noble Roger Eason (3)            Nedlloyd                1997    R     6,000    25,000    Brazil            Active
Noble Leo Segerius (3)           Gusto Engineering       1996    R     4,900    20,000    Brazil            Active
                                  Pelican Class
Noble Muravlenko (3)(7)          Gusto Engineering       1997    R     4,000    21,000    Brazil            Active
                                  Pelican Class
JACKUP RIGS - 32
Noble Bill Jennings (3)          MLT 84 - ERC(TM)        1997    R       390    25,000    U.S. Gulf         Active
Noble Leonard Jones (3)          MLT 53 - ERC(TM)        1998    R       390    25,000    U.S. Gulf         Active
Noble Eddie Paul (3)             MLT 84 - ERC(TM)        1995    R       390    25,000    U.S. Gulf         Active
Noble Al White (3)(5)            CFEM T-2005C            1997    R       360    25,000    Norway            Active
Noble Kolskaya (3)(5)(8)         Gusto Engineering       1997    R       330    25,000    Denmark           Active
Noble Johnnie Hoffman (3)        Baker Marine BMC 300    1993    R       300    25,000    U.S. Gulf         Active
Noble Byron Welliver (3)(5)      CFEM T-2005C            1982            300    25,000    Denmark           Active
Noble Roy Butler (3)(9)          F&G L-780 MOD II        1996    R       300    25,000    Zaire             Active
Noble Tommy Craighead (3)        F&G L-780 MOD II        1990    R       300    25,000    Nigeria           Active
Noble Kenneth Delaney (3)(10)    F&G L-780 MOD II        1998    R       300    25,000    Qatar             Active
Noble Percy Johns (3)            F&G L-780 MOD II        1995    R       300    25,000    Nigeria           Active
Noble George McLeod (3)          F&G L-780 MOD II        1995    R       300    25,000    Qatar             Active
Noble Jimmy Puckett (11)         F&G L-780 MOD II        1982            300    25,000    India             Active
Noble Gus Androes (3)            Levingston 111-C        1996    R       300    25,000    Qatar             Active
Noble Lewis Dugger (3)           Levingston 111-C        1997    R       300    20,000    Bay of Campeche   Active
Noble Ed Holt (3)(11)(12)        Levingston 111-C        1994    R       300    25,000    India             Active
Noble Sam Noble (3)              Levingston 111-C        1982            300    25,000    Bay of Campeche   Active
Noble Gene Rosser (3)            Levingston 111-C        1996    R       300    20,000    Bay of Campeche   Active
Noble John Sandifer (3)(13)      Levingston 111-C        1995    R       300    25,000    U.S. Gulf         Active
Noble Charles Copeland (3)       MLT Class 82-SD-C       1995    R       250    20,000    Venezuela         Active
Noble Earl Frederickson (3)      MLT Class 82-SD-C       1979    R       250    20,000    Venezuela         Active
Noble Tom Jobe (3)               MLT Class 82-SD-C       1982            250    25,000    U.S. Gulf         Active
Noble Ed Noble (3)               MLT Class 82-SD-C       1990    R       250    20,000    Nigeria           Active
Noble Lloyd Noble (3)            MLT Class 82-SD-C       1990    R       250    20,000    Nigeria           Active
Noble Carl Norberg (3)(14)       MLT Class 82-C          1996    R       250    20,000    Venezuela         Active
Noble Chuck Syring (3)           MLT Class 82-C          1996    R       250    20,000    Qatar             Active
Noble Ronald Hoope (3)(5)(15)    Marine Structure CJ-46  1982            205    25,000    Netherlands       Active
Noble Lynda Bossler (3)(5)(15)   Marine Structure CJ-46  1982            205    25,000    Netherlands       Active
Noble George Savageau (3)(5)(15) NAM Nedlloyd            1981            225    20,000    Netherlands       Active
Noble Piet Van Ede (3)(5)(15)    Marine Structure CJ-46  1982            205    25,000    Netherlands       Active
Noble Dick Favor                 Baker Marine BMC 150    1993    R       150    20,000    Venezuela         Active
Noble Don Walker (3)             Baker Marine BMC 150    1992    R       150    20,000    Nigeria           Active


SUBMERSIBLES - 3
Noble Joe Alford                 Pace Marine 85G         1997    R        85    25,000    U.S. Gulf         Active
Noble Lester Pettus              Pace Marine 85G         1997    R        85    25,000    U.S. Gulf         Active
Noble Fri Rodli                  Transworld              1998    R        70    25,000    U.S. Gulf         Active

10


(1) Rigs designated with an "R" were modified, refurbished or otherwise upgraded in the year indicated by capital expenditures in an amount material to the net book value of such rig.
(2) Rigs listed as "active" were operating under contract. Rigs listed as "shipyard" are in a shipyard for repair, refurbishment or upgrade. Shipyard work is scheduled to be completed during 1998 except for the Noble Jim Thompson, Noble Amos Runner, Noble Max Smith and Noble Homer Ferrington, which are scheduled to be completed in 1999.
(3) Equipped with a top drive unit.
(4) Under letter of intent for long-term contract.
(5) Harsh environment capability.
(6) Currently active as a submersible prior to its scheduled conversion to an EVA-4000(TM) semisubmersible commencing June 1998.
(7) The Company owns a 41 percent interest in the drillship through a joint venture arrangement.
(8) The Company owns a 50 percent interest in the rig through a joint venture arrangement.
(9) Although designed for a water depth rating of 300 feet, the rig is currently equipped with legs adequate to drill in approximately 250 feet of water. The Company owns the additional legs required to extend the drilling depth capability to 300 feet of water.
(10) Recently completed a refurbishment in Sharjah and is being deployed to Qatar to begin a three-year contract.
(11) Bareboat chartered to a third party under which the Company maintains operating control of the rig.
(12) Scheduled to enter the shipyard in March 1998 for upgrade.
(13) The rig is expected to be mobilized to the Bay of Campeche, Mexico in the first half of 1998.
(14) The rig is being demobilized out of Venezuela and currently is available for contract.
(15) Water depth rating based on North Sea conditions year round.

FACILITIES

The Company's principal executive offices are located in Houston, Texas, and leased through the year 2000. The Company also leases administrative and marketing offices, and sites used primarily for storage, maintenance and repairs for drilling rigs and equipment, in New Orleans and Lafitte, Louisiana; Leduc and St. Johns, Canada; Warri, Lagos and Port Harcourt, Nigeria, Aberdeen, Scotland; Maracaibo and Cuidad Ojeda, Venezuela; Doha, Qatar; Rotterdam and Beverwijk, The Netherlands; Macae, Brazil; and Esjberg, Denmark.

The Company owns certain tracts of land, including office and administrative buildings, warehouse facilities and a manufacturing facility, in Harris and Waller Counties, Texas; Lafayette and Bayou Black, Louisiana; and Aberdeen, Scotland.

ITEM 3. LEGAL PROCEEDINGS

There are no material pending legal proceedings to which the Company is a party or of which certain of its property is the subject. The Company is involved in certain routine litigation incidental to the business of the Company.

11

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

Not applicable.

EXECUTIVE OFFICERS OF THE REGISTRANT

The following table sets forth certain information as of March 9, 1998 with respect to the executive officers of Noble Drilling.

     NAME                             AGE                                   POSITION
     ----                              ---                                   --------
James C. Day                           54        Chairman, President and Chief Executive Officer and Director

Byron L. Welliver                      52        Senior Vice President - Finance, Treasurer and Controller

Julie J. Robertson                     42        Vice President - Administration and Corporate Secretary

James C. Day has served as Chairman of Noble Drilling since October 22, 1992, and as President and Chief Executive Officer since January 1, 1984. From January 1983 until his election as President and Chief Executive Officer, Mr. Day served as Vice President of Noble Drilling. Prior to 1983, Mr. Day served as Vice President and Assistant Secretary of Noble Affiliates, Inc. He has been a director of Noble Drilling since 1984. Mr. Day is also a director of Global Industries, Ltd. and Noble Affiliates, Inc.

Byron L. Welliver has served as Senior Vice President - Finance of Noble Drilling since April 1989, as Treasurer of Noble Drilling since July 1986, and as Controller of Noble Drilling since September 1994. Mr. Welliver had served as Controller from April 1989 to April 1991. From July 1986 to April 1989, he also served as Vice President - Finance for Noble Drilling. He joined Noble Drilling in October 1985, as Controller. Prior to joining Noble Drilling, Mr. Welliver served consecutively as Tax Manager, Controller and Treasurer of Noble Affiliates, Inc. beginning in March 1981.

Julie J. Robertson has served as Vice President-Administration of Noble Drilling since April 1996 and as Corporate Secretary of Noble Drilling since December 1993. In September 1994, Ms. Robertson became Vice President-Administration of Noble Drilling Services Inc. From January 1989 to September 1994, Ms. Robertson served consecutively as Manager of Benefits and Director of Human Resources for Noble Drilling Services Inc. Prior to 1989, Ms. Robertson served consecutively in the positions of Risk and Benefits Manager and Marketing Services Coordinator for a predecessor subsidiary of the Company, beginning in 1979.

12

PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

Noble Drilling's Common Stock, par value $0.10 per share ("Common Stock"), is listed and traded on the New York Stock Exchange under the symbol "NE". The following table sets forth for the periods indicated the high and low sales prices of the Common Stock.

                                                HIGH           LOW
                                              ---------     ----------
1997
         First quarter...................     $ 24 1/2      $ 15 5/8
         Second quarter..................       23 3/8        15 1/2
         Third quarter...................       32 1/2        22 5/8
         Fourth quarter..................       38 3/16       25 9/16
1996
         First quarter...................     $ 13          $ 8
         Second quarter..................       16 3/8        11 3/4
         Third quarter...................       16 3/4        13 1/4
         Fourth quarter..................       22            14 7/8

The Company has not paid any cash dividends on the Common Stock since becoming a publicly held corporation in October 1985, and does not anticipate paying dividends on the Common Stock at any time in the foreseeable future. Certain provisions of the indenture governing the Company's 9 1/8% Senior Notes due 2006 restrict the Company's ability to pay cash dividends on the Common Stock.

At March 9, 1998, there were 2,411 record holders of Common Stock.

13

ITEM 6. SELECTED FINANCIAL DATA

                                                                             YEAR ENDED DECEMBER 31,
                                                    -------------------------------------------------------------------------------
                                                       1997             1996             1995             1994             1993
                                                    -----------      -----------      -----------      -----------      -----------
                                                                       (In thousands, except per share amounts)
STATEMENT OF OPERATIONS DATA (1)
Operating revenues ............................     $   713,195      $   514,253      $   327,968      $   351,988      $   264,531
Operating costs (2) ...........................         387,081          331,582          240,102          243,208          178,684
Depreciation and amortization (3) .............          77,922           52,159           36,492           39,519           28,886
Selling, general and administrative ...........          64,777           54,504           40,139           47,606           28,284
Restructuring charges (4) .....................              --               --               --            3,661               --
Minority interest (5) .........................            (256)            (428)            (214)            (169)            (232)
Gains on sales of property and equipment,
  net of impairments (6) ......................        (197,676)         (36,115)            (829)          (8,858)              --
                                                    -----------      -----------      -----------      -----------      -----------
Operating income ..............................         381,347          112,551           12,278           27,021           28,909
Interest expense ..............................         (12,894)         (18,758)         (12,156)         (12,351)          (8,038)
Interest income ...............................           9,356            6,409            5,323            5,640            2,497
Other income (expense), net ...................           1,804            1,757             (579)           6,885            1,047
                                                    -----------      -----------      -----------      -----------      -----------
Income before income taxes and
  extraordinary charge ........................         379,613          101,959            4,866           27,195           24,415
Income tax provision ..........................        (115,731)         (22,662)          (3,272)          (5,672)          (3,333)
                                                    -----------      -----------      -----------      -----------      -----------
Income before extraordinary charge ............         263,882           79,297            1,594           21,523           21,082
Extraordinary charge, net of tax (7) ..........          (6,685)            (660)              --               --            1,770
                                                    -----------      -----------      -----------      -----------      -----------
Net income ....................................         257,197           78,637            1,594           21,523           22,852
Preferred stock dividends (8) .................              --           (6,040)          (7,199)         (12,764)          (7,936)
                                                    -----------      -----------      -----------      -----------      -----------
Net income (loss) applicable to
  common shares ...............................     $   257,197      $    72,597      $    (5,605)     $     8,759      $    14,916
                                                    ===========      ===========      ===========      ===========      ===========

Net income (loss) applicable to common
  shares per share-basic (9)(10) ..............     $      1.95      $      0.67      $     (0.08)     $      0.11      $      0.23
Weighted average common shares outstanding ....         131,791          108,290           88,873           76,953           66,066

Net income (loss) applicable to common
  shares per share-assuming dilution (9)(10) ..     $      1.93      $      0.66      $     (0.08)     $      0.11      $      0.22
Weighted average common shares outstanding ....         133,455          109,581           88,873           77,310           66,469

BALANCE SHEET DATA (AT END OF PERIOD) (1)
Working capital ...............................     $   112,125      $   236,977      $   101,623      $   157,885      $   150,535
Property and equipment, net ...................     $ 1,200,915      $   957,034      $   542,978      $   493,322      $   482,029
Total assets ..................................     $ 1,505,811      $ 1,367,173      $   742,530      $   739,889      $   696,553
Long-term debt ................................     $   138,139      $   239,272      $   129,923      $   126,546      $   127,144
Total debt (10)(11) ...........................     $   147,837      $   242,894      $   142,133      $   132,790      $   127,690
Shareholders' equity ..........................     $ 1,149,054      $   925,249      $   523,493      $   527,611      $   516,770

OTHER DATA (1)
Cash dividends per common share ...............     $      0.00      $      0.00      $      0.00      $      0.00      $      0.00
Capital expenditures ..........................     $   391,065      $   216,887      $    91,202      $    55,834      $   173,501


(1) The Selected Financial Data present the restatement of the Company's historical financial statements for 1994 and 1993 to reflect the 1994 merger of Chiles Offshore Corporation into Noble Offshore Corporation ("NOC"), a wholly owned subsidiary of the Company, which was accounted for as a pooling of interests. The Selected Financial Data also include the July 1996 acquisition of Neddrill, the acquisition of Triton in

(footnotes continued on following page)

14

April 1994 and the October 1993 acquisition of nine offshore rigs and associated assets from The Western Company of North America, all of which were accounted for under the purchase method.
(2) Consists of operating costs and expenses other than depreciation and amortization, selling, general and administrative, restructuring charges, minority interest and gains on sales of property and equipment, net of impairments.
(3) Effective January 1, 1995, the Company revised its estimates of salvage values and remaining depreciable lives of certain rigs. The effect of this change in estimate was a decrease to depreciation and amortization of $6,160,000, or $0.07 per common share, for the year ended December 31, 1995.
(4) The amount for 1994 consists of provisions resulting from write-downs of certain assets, facility consolidation costs and, to a lesser extent, severance costs.
(5) The 1996 amount includes ($289,000) relating to an impairment charge of $10,200,000.
(6) The 1997 amount relates to the gain on the sale of the mat-supported jackup rigs. The 1996 amount includes $45,414,000 and $7,527,000 related to gains on the sale of land drilling assets and posted barge rigs, respectively, partially offset by impairment charges of $17,800,000.
(7) Consists of losses on extinguishment of debt in 1997 and 1996 and a gain on extinguishment of debt in 1993.
(8) In December 1996, the outstanding shares of $1.50 Convertible Preferred Stock of Noble Drilling were either converted into shares of Noble Drilling common stock or redeemed.
(9) The 1995 amount includes the $0.02 per share effect of the March 1995 preferred conversion payment related to the conversion of 923,862 shares of Noble Drilling's $2.25 Convertible Exchangeable Preferred Stock. The payment of $1,524,000 was accounted for as a reduction of net earnings applicable to common shares when calculating the net loss applicable to common shares per share.
(10) The Company has adopted SFAS No. 128, Earnings Per Share ("SFAS 128"). All prior period earnings per share data have been restated to conform to the provisions of SFAS 128.
(11) Consists of long-term debt, short-term debt and current installments of long-term debt.

ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion is intended to assist in understanding the Company's financial position as of December 31, 1997 and 1996, and its results of operations for each of the three years in the period ended December 31, 1997. Reference is also made to the Consolidated Financial Statements and the Notes thereto, included elsewhere herein, which should be read in conjunction with this discussion.

OUTLOOK

The Company believes that the worldwide utilization of drilling rigs should remain strong relative to historical levels for the remainder of 1998, particularly in international markets, assuming that oil prices and the respective political environments remain stable. Historically, though, the offshore contract drilling market has been highly competitive and cyclical, and the Company cannot predict the future level of demand for its drilling services or future conditions in the offshore contract drilling industry. Since 1995, demand for offshore drilling equipment has increased substantially, and as a result, exploration and development costs have risen steadily over the past two years. Recent trends in commodity prices, particularly crude oil, have been unfavorable, and further decreases in the prices of oil and natural gas may adversely affect the demand for drilling equipment and related services. Any decrease in drilling activity may impact the utilization of the Company's assets and the dayrates earned on the equipment.

The Company has maintained a strategy in recent years to selectively expand its international and deepwater drilling capabilities through fleet and individual asset acquisitions, rig upgrades and enhancements, major conversion projects and redeployment of assets in important geological areas. The Company expects to continue with this strategy in the foreseeable future to the extent that expansions, enhancements and redeployments are economically justified.

15

RESULTS OF OPERATIONS

SIGNIFICANT 1997 EVENTS

The consolidated results of operations for the year ended December 31, 1997 reflect several significant transactions and events. Management believes these events reflect the Company's efforts to enhance its position within the offshore contract drilling services industry.

On May 7, 1997, the Company completed the sale of its 12 mat supported jackup rigs to Pride Petroleum Services, Inc. for $268,818,000 in cash, resulting in a pre-tax gain of $197,676,000, which is included in "Gains on sales of property and equipment, net of impairments" in the accompanying Consolidated Statement of Operations for the year ended December 31, 1997. Revenues, gross margin and operating income generated from the mat rigs were $35,155,000, $18,585,000 and $15,231,000, respectively, for the period from January 1, 1997 through May 7, 1997.

The Company purchased $110,885,000 principal amount of its 9 1/4% Senior Notes Due 2003 ("9 1/4% Senior Notes") during the year ended December 31, 1997, resulting in an extraordinary charge of $6,685,000, net of taxes of $3,600,000. The extraordinary charge represents the difference between the acquisition price and the net carrying value of the notes, including unamortized debt issuance costs.

SIGNIFICANT 1996 EVENTS

On July 1, 1996, the Company completed the acquisition from Royal Nedlloyd N.V. ("Nedlloyd") and its wholly owned subsidiary, Neddrill Holding B.V., of Nedlloyd's offshore drilling division, Neddrill ("Neddrill") for $300,000,000 in cash plus 5,000,000 shares of Noble Drilling common stock. The cash portion of the purchase price was financed by the Company's issuance and sale of 21,850,000 shares of its common stock and $125,000,000 principal amount of 9 1/8% Senior Notes due 2006 (the "9 1/8% Senior Notes"). The net proceeds from the public offerings of securities in excess of the $300,000,000 cash portion of the purchase price were added to the Company's working capital.

The Company sold two of its posted barge rigs during the first quarter of 1996. The Gus Androes, located in the U.S. Gulf, was sold for $6,000,000. The Gene Rosser, located offshore Nigeria, was sold for $13,000,000. The Company recorded pre-tax gains of $4,815,000 and $2,712,000, respectively, related to the sales of these posted barge rigs. The Lewis Dugger and Chuck Syring posted barge rigs, which were also located offshore Nigeria, were sold in August 1996 for $24,500,000 in cash and $7,500,000 in drill pipe credit. These two barges had been written down at March 31, 1996 to their estimated net realizable values based on then recent offers received for these assets from third parties, resulting in a pre-tax charge to earnings of $7,600,000. The gains on the sales of the four barge rigs net of the write-downs are included in "Gains on sales of property and equipment, net of impairments" in the accompanying Consolidated Statement of Operations for the year ended December 31, 1996.

In December 1996, the Company sold its land drilling assets to Nabors Industries, Inc. for $60,000,000 in cash, resulting in a pre-tax gain of $45,414,000, which is included in "Gains on sales of property and equipment, net of impairments" in the accompanying Consolidated Statement of Operations for the year ended December 31, 1996. Revenues, gross margin and operating income generated from the land drilling assets were $24,637,000, $6,733,000 and $3,025,000, respectively, for the year ended December 31, 1996.

As a result of the Company's asset rationalization program and the July 1, 1996 acquisition of Neddrill, during the fourth quarter of 1996, the Company reviewed the status of its inventories as well as its long-term assets. The Company determined that certain adjustments were appropriate to properly reflect the estimated net realizable values of these assets. These adjustments consisted primarily of write-downs for inventory obsolescence totaling approximately $14,808,000, an impairment charge of $10,200,000 (excluding a $289,000 reduction for minority interest) and adjustments to depreciation for assets which were determined to have shorter economic lives than originally estimated, totaling approximately $3,350,000. The impairment charge is included in "Gains on sales of property and equipment, net of impairments" and the inventory write-down is included in "Contract drilling services" expense in the accompanying Consolidated Statement of Operations for the year ended December 31, 1996.

16

Results for 1996 also included an extraordinary charge of $660,000, net of taxes of $355,000, related to the Company's purchase of $11,000,000 principal amount of its 9 1/4% Senior Notes. The extraordinary charge represents the difference between the acquisition price and the net carrying value of the notes, including unamortized debt issuance costs.

1997 COMPARED TO 1996

GENERAL

Net income applicable to common shares for the year ended December 31, 1997 was $257,197,000, or $1.93 per share, on operating revenues of $713,195,000, compared to net income applicable to common shares of $72,597,000, or $0.66 per share, on operating revenues of $514,253,000 for the year ended December 31, 1996. Excluding the effects of non-recurring items, net income applicable to common shares for the year ended December 31, 1997 increased 89 percent over the 1996 period to $136,896,000, or $1.03 per share.

RIG UTILIZATION, OPERATING DAYS AND AVERAGE DAYRATE

The following table sets forth the average rig utilization rates, operating days and average dayrate for the Company's offshore rig fleet for the years ended December 31, 1997 and 1996:

                               AVERAGE RIG
                          UTILIZATION RATES (1)            OPERATING DAYS               AVERAGE DAYRATE
                        --------------------------   ---------------------------   ---------------------------
                           1997        1996 (2)          1997        1996 (2)          1997        1996 (2)
                        ------------  ------------   ------------  -------------   ------------  -------------
Offshore
    International....       95%           95%            9,826         7,372       $   35,244    $   27,207
    Domestic.........       98%           96%            3,474         5,349       $   35,313    $   23,332


(1) Information reflects the policy of the Company to report utilization rates based on the number of actively marketed rigs owned in the fleet. During the periods presented, the Company purchased and sold certain drilling rigs. Utilization rates for the periods prior to sales and purchases of such rigs have not been adjusted.
(2) Includes the results of Neddrill from July 1, 1996.

INTERNATIONAL OPERATIONS

The following table sets forth the operating revenues and gross margin (excluding non-recurring items) for the Company's international operations for the years ended December 31, 1997 and 1996:

                                                 REVENUES                GROSS MARGIN
                                           ---------------------     ---------------------
                                             1997         1996         1997         1996
                                           --------     --------     --------     --------
                                                           (In thousands)
Contract drilling services
   Offshore ..........................     $346,304     $200,566     $203,319     $ 81,916 (1)
   Land ..............................           --       10,037           --        3,178
                                           --------     --------     --------     --------
Total contract drilling services .....      346,304      210,603      203,319       85,094
Turnkey contract drilling services ...       52,765           --        2,609           --
Labor contract drilling services .....       49,076       33,425       14,540        9,299 (2)
Engineering and consulting services ..        2,548        2,509          698          611
Other revenue ........................        8,289        5,675        6,008        4,060
                                           --------     --------     --------     --------
         Total .......................     $458,982     $252,212     $227,174     $ 99,064
                                           ========     ========     ========     ========


(1) Excludes $13,624,000 of non-recurring inventory charges.
(2) Excludes $1,184,000 of non-recurring inventory charges.

OPERATING REVENUES. International offshore contract drilling services revenues increased $145,738,000 during 1997 as compared to 1996. The increase is primarily attributable to the acquisitions of the Neddrill fleet,

17

higher average international dayrates and the revenues attributable to the Noble Jimmy Puckett, Noble Kenneth Delaney, Noble Gus Androes and Noble Chuck Syring jackup rigs. All of the Company's land assets were sold in December 1996. Labor contract drilling services revenues increased $15,651,000 in 1997 as compared to 1996 due to higher average dayrates on the North Sea platform contracts and the startup of the Hibernia project offshore Newfoundland, Canada. Turnkey drilling services revenues increased $52,765,000 resulting from five completions in West Africa, two in the North Sea and one in Mexico in 1997, as compared to no international wells completed in 1996.

GROSS MARGIN. International offshore contract drilling services gross margin increased $121,403,000 in 1997 as compared to 1996. The increase is primarily attributable to the contributions from the Neddrill fleet, higher average international dayrates and contributions from the Noble Jimmy Puckett, Noble Kenneth Delaney, Noble Gus Androes and Noble Chuck Syring. The increase in gross margin for labor contract drilling services in 1997, as compared to 1996, was attributable to higher average dayrates on the North Sea platform contracts and the start-up of the Hibernia project offshore Newfoundland, Canada. The increase in gross margin for turnkey drilling services in 1997 as compared to 1996 was attributable to increased turnkey well completions. However, the low turnkey gross margin in 1997 was due to unexpected drilling difficulty on a well completed in Mexico.

DOMESTIC OPERATIONS

The following table sets forth the operating revenues and gross margin for the Company's domestic operations for the years ended December 31, 1997 and 1996:

                                              REVENUES                 GROSS MARGIN
                                        ---------------------     ----------------------
                                          1997         1996         1997          1996
                                        --------     --------     --------      --------
                                                        (In thousands)
Contract drilling services
   Offshore .......................     $122,676     $124,805     $ 86,342      $ 58,386
   Land ...........................           --       14,600           --         3,555
                                        --------     --------     --------      --------
Total contract drilling services ..      122,676      139,405       86,342        61,941
Turnkey contract drilling services       128,098      114,948       13,341        34,171
Engineering and consulting services           58        2,445           --           956
Other revenue .....................        3,381        5,243         (743)        1,347
                                        --------     --------     --------      --------
         Total ....................     $254,213     $262,041     $ 98,940      $ 98,415
                                        ========     ========     ========      ========

OPERATING REVENUES. Domestic offshore contract drilling services revenues decreased $2,129,000 in 1997 as compared to 1996. The decrease was due primarily to the sale of the Company's mat supported jackup fleet, which reduced the number of rig operating days in 1997 as compared to 1996. The decrease in rig operating days was partially offset by a significant increase in the average domestic contract drilling dayrate. All of the Company's land drilling assets were sold in December 1996. The increase in turnkey drilling services revenues is primarily attributable to a higher average revenue per well in 1997 as compared to 1996.

GROSS MARGIN. Domestic offshore contract drilling services gross margin increased $27,956,000 in 1997 as compared to 1996. The increase is primarily attributable to higher average domestic dayrates, which was partially offset by the sale of the Company's mat supported jackup fleet during 1997. The decrease in turnkey drilling services gross margin was attributable to several wells that incurred losses during 1997 as a result of unexpected drilling difficulty. The negative gross margin for other revenue was primarily attributable to non-recurring charges of approximately $2,313,000 associated with the disposition of certain non-core assets of Triton.

OTHER OPERATING ITEMS

DEPRECIATION AND AMORTIZATION EXPENSE. Depreciation and amortization expense increased $25,763,000 in 1997 as compared to 1996. Of this amount, $17,294,000 represents depreciation attributable to the Neddrill fleet, and approximately $7,618,000 relates to the Noble Jimmy Puckett, Noble Kenneth Delaney, Noble Gus Androes and Noble Chuck Syring, which were acquired in 1996 and placed into service in the latter part of 1996. These increases were partially offset by lower depreciation on the mat supported jackup rigs, which were sold in May 1997.

18

SELLING, GENERAL AND ADMINISTRATIVE EXPENSES. Selling, general and administrative ("SG&A") expenses increased $10,273,000 in 1997 as compared to 1996. The increase is attributable to the Neddrill acquisition combined with other general increases resulting from higher activity levels and the costs of stock-based employee compensation plans, which costs are based solely on changes in the market price of the Company's common stock.

INTEREST EXPENSE. Interest expense decreased $5,864,000 in 1997 as compared to 1996 due primarily to the Company's repurchase of its 9 1/4% Senior Notes and the capitalization of $4,218,000 of interest costs related to construction in progress on qualifying upgrade projects.

INCOME TAX PROVISION. The effective income tax rate in 1997 increased to approximately 31 percent from approximately 22 percent in 1996. Income taxes of $69,187,000 were recorded in 1997 in connection with the gain on the sale of the mat rigs. 1996 was favorably impacted by the recognition of deferred tax benefits related to net operating loss carryforwards.

1996 COMPARED TO 1995

GENERAL

For the year ended December 31, 1996, net income applicable to common shares was $72,597,000, or $0.66 per share, on operating revenues of $514,253,000 compared to a net loss applicable to common shares of $5,605,000, or $0.08 per share, on operating revenues of $327,968,000 for the year ended December 31, 1995. For the year ended December 31, 1996, operating income, excluding non-recurring items, increased to $95,279,000 from operating income of $12,278,000 in 1995.

RIG UTILIZATION, OPERATING DAYS AND AVERAGE DAYRATE

The following table sets forth the average rig utilization rates, operating days and average dayrate for the Company's rig fleet for the years ended December 31, 1996 and 1995:

                               AVERAGE RIG
                          UTILIZATION RATES (1)            OPERATING DAYS               AVERAGE DAYRATE
                        --------------------------   ---------------------------   ---------------------------
                          1996 (2)        1995          1996 (2)        1995          1996 (2)        1995
                        ------------  ------------   ------------  -------------   ------------  -------------
Offshore
    International....       95%           75%            7,372         4,442       $   27,207    $   22,104
    Domestic.........       96%           84%            5,349         4,949       $   23,332    $   16,376

Land
    International....       39%           53%            1,228         1,746       $    8,174    $    7,923
    Domestic.........       75%           69%            2,577         2,175       $    5,666    $    5,538


(1) Information reflects the policy of the Company to report utilization rates based on the number of actively marketed rigs owned in the fleet. During the periods presented, the Company purchased and sold certain drilling rigs. Utilization rates for the periods prior to sales and purchases of such rigs have not been adjusted.
(2) Includes the results of Neddrill from July 1, 1996.

19

INTERNATIONAL OPERATIONS

The following table sets forth the operating revenues and gross margin (excluding non-recurring items) for the Company's international operations for the years ended December 31, 1996 and 1995:

                                                   REVENUES                GROSS MARGIN
                                             ---------------------     ---------------------
                                               1996         1995         1996         1995
                                             --------     --------     --------     --------
                                                             (In thousands)
Contract drilling services
   Offshore ............................     $200,566     $ 98,187     $ 81,916 (1) $ 36,584
   Land ................................       10,037       13,833        3,178        4,937
                                             --------     --------     --------     --------
Total contract drilling services .......      210,603      112,020       85,094       41,521
Labor contract drilling services .......       33,425       35,136        9,299 (2)    8,596
Engineering and consulting services ....        2,509       10,807          611        4,782
Other revenue ..........................        5,675        4,614        4,060        2,089
                                             --------     --------     --------     --------
         Total .........................     $252,212     $162,577     $ 99,064     $ 56,988
                                             ========     ========     ========     ========


(1) Excludes $13,624,000 of non-recurring inventory charges.
(2) Excludes $1,184,000 of non-recurring inventory charges.

OPERATING REVENUES. International offshore contract drilling services revenues increased $102,379,000 in 1996 as compared to 1995. The increase is primarily attributable to the July 1, 1996 acquisition of Neddrill. Neddrill contributed $70,015,000 in contract drilling services revenues in 1996. The drilling operations in India and Qatar, which benefited from the addition of the Noble Gus Androes, Noble Chuck Syring and Noble Kenneth Delaney rigs in 1996, contributed $20,903,000 of contract drilling services revenues in 1996 as compared to $4,495,000 in 1995. The remaining increase is attributable to higher utilization rates and average dayrates in 1996 as compared to 1995.

GROSS MARGIN. International offshore contract drilling services gross margin (excluding non-recurring items) increased $45,332,000 in 1996 as compared to 1995. The increase in gross margin is primarily attributable to the July 1, 1996 acquisition of Neddrill, which contributed gross margin of $28,756,000 in 1996. Increased operations in India and Qatar, resulting from the addition of the Noble Gus Androes, Noble Chuck Syring and Noble Kenneth Delaney rigs, contributed gross margin of $4,072,000 in 1996 compared to a loss of $143,000 in 1995. The remaining increase is attributable primarily to higher average dayrates in 1996 as compared to 1995.

DOMESTIC OPERATIONS

The following table sets forth the operating revenues and gross margin for the Company's domestic operations for the years ended December 31, 1996 and 1995:

                                              REVENUES                GROSS MARGIN
                                        ---------------------     ---------------------
                                          1996         1995         1996         1995
                                        --------     --------     --------     --------
                                                        (In thousands)
Contract drilling services
   Offshore .......................     $124,805     $ 81,045     $ 58,386     $ 22,751
   Land ...........................       14,600       12,045        3,555        2,498
                                        --------     --------     --------     --------
Total contract drilling services ..      139,405       93,090       61,941       25,249
Turnkey contract drilling services       114,948       71,273       34,171        6,802
Engineering and consulting services        2,445          457          956         (829)
Other revenue .....................        5,243          571        1,347         (344)
                                        --------     --------     --------     --------
         Total ....................     $262,041     $165,391     $ 98,415     $ 30,878
                                        ========     ========     ========     ========

OPERATING REVENUES. Domestic offshore contract drilling services revenues increased $43,760,000 in 1996 as compared to 1995 due to significantly higher utilization rates and higher average dayrates. The increases were attributable to overall increased drilling activity in the U.S. Gulf in 1996 as compared to 1995. Turnkey contract drilling services revenues increased $43,675,000 in 1996 as compared to 1995. There were 28 well completions in 1996 as compared to 27 in 1995, combined with contracts of longer duration and increased prices caused by growing demand for equipment and services in the U.S. Gulf.

20

GROSS MARGIN. Domestic offshore contract drilling services gross margin increased $35,635,000 in 1996 as compared to 1995 due to higher average dayrates. The average dayrate in 1996 was $23,332 compared to $16,376 in 1995. Turnkey drilling services gross margin increased $27,369,000 in 1996 as compared to 1995 due to an improved success rate on turnkey wells and increased turnkey activity. The turnkey gross margin was low in 1995, primarily because of significant operational problems on two wells which resulted in aggregate losses of $7,293,000.

OTHER OPERATING ITEMS

DEPRECIATION AND AMORTIZATION EXPENSE. Depreciation and amortization expense increased $12,317,000 (excluding non-recurring depreciation of $3,350,000) in 1996 as compared to 1995. Of this amount, $10,142,000 is attributable to the July 1, 1996 acquisition of Neddrill. The remaining increase is primarily attributable to increases resulting from rig acquisitions and refurbishments during late 1995 and 1996.

SELLING, GENERAL AND ADMINISTRATIVE EXPENSES. SG&A expenses were $54,504,000 in 1996 as compared to $40,139,000 in 1995. The increase is primarily attributable to the July 1, 1996 acquisition of Neddrill combined with other general increases resulting from the higher activity levels for 1996.

GAIN ON SALES OF PROPERTY AND EQUIPMENT, NET OF IMPAIRMENTS. In 1996, the Company sold its land drilling assets and the Gus Androes and Gene Rosser posted barge rigs, resulting in pre-tax gains of $45,414,000, $4,815,000 and $2,712,000, respectively, which have been partially offset by the recognition of impairment charges totaling $17,800,000. See "Results of Operations - Significant 1996 Events."

INTEREST EXPENSE. Interest expense increased to $18,758,000 in 1996 from $12,156,000 in 1995 due to the July 1, 1996 issuance of $125,000,000 principal amount of 9 1/8% Senior Notes. The proceeds from the issuance of the 9 1/8% Senior Notes were used to finance the Neddrill acquisition.

OTHER, NET. Other, net increased by $2,336,000 in 1996 as compared to 1995 due primarily to an increase in net realized gains on marketable investments and unrealized gains on marketable equity investments.

INCOME TAX PROVISION. Provisions for income taxes of $22,662,000 and $3,272,000 were recorded in 1996 and 1995, respectively. The increase is due primarily to taxes of $16,259,000 recorded for 1996 in connection with the gain on the sale of land drilling assets.

LIQUIDITY AND CAPITAL RESOURCES

OVERVIEW

The Company had working capital of $112,125,000 and $236,977,000 as of December 31, 1997 and December 31, 1996, respectively. Long-term debt as a percentage of long-term debt plus shareholders' equity was 11 percent at December 31, 1997, compared to 21 percent at December 31, 1996.

At December 31, 1997, the Company had cash, cash equivalents and marketable debt securities of $66,388,000 and had $202,603,000 of funds available under various lines of credit. The Company expects to generate positive cash flow from operations in 1998, assuming no material decrease in demand for contract drilling and turnkey drilling services. The Company will continue to have cash requirements for debt principal and interest payments; for 1998, cash requirements for currently outstanding debt principal and interest payments are estimated to be approximately $21,392,000. The Company expects to fund these payments out of cash and short-term investments as well as cash provided by operations.

Capital expenditures totaled $391,065,000 and $216,887,000 for the years ended December 31, 1997 and 1996, respectively. Capital expenditures for 1997 included approximately $164,000,000 for the EVA-4000(TM) semisubmersible rig conversions. Capital expenditures for 1998 are expected to total approximately $520,000,000, of which the majority relates to upgrades of existing equipment. This amount includes approximately $422,000,000 for the EVA-4000(TM) semisubmersible rig conversions, which are in process or planned for 1998. The Company has entered into contracts for three of these EVA-4000(TM) semisubmersible rigs, the Noble Paul Romano, Noble Paul Wolff and Noble Amos Runner, and the Company has commitments for two additional EVA-4000(TM) rigs, the Noble Jim Thompson and Noble Max Smith. The Company has entered into a letter of intent with two operators to utilize

21

the Noble Homer Ferrington (formerly the Shelf 4) in the Gulf of Mexico. The Company will be required to make significant capital expenditures to refurbish and upgrade the rig. The total cost of these six projects is expected to be approximately $800,000,000. Further, the Company is marketing additional rigs for conversion into deepwater design semisubmersible units. Because any such conversion would require substantial capital expenditures, such projects will not be completed except in connection with entering into a long-term drilling contract with an operator. However, given the strong demand for drilling rigs and related services, increasingly heavy backlogs for equipment and services required to complete the conversions could constrain the Company's ability to complete the conversions on a timely basis. The Company has entered into agreements with several vendors to purchase equipment or for the construction of equipment for the conversion of rigs, which agreements generally require non-refundable payments as certain milestones are met. The amount of such payments totaled $76,600,000 as of December 31, 1997. As of December 31, 1997, the Company also had purchase commitments of $27,700,000, which are subject to negotiation upon cancellation. These expenditures will be funded from operating cash flows, existing cash balances, available lines of credit and possibly from other sources of project financing. The Company is currently reviewing several proposals from financial institutions to provide project financing for the EVA-4000(TM) semisubmersible conversions.

The Noble Paul Romano and Noble Paul Wolff conversions are not expected to be available for work until the latter part of 1998. The Noble Amos Runner, Noble Jim Thompson, Noble Max Smith and Noble Homer Ferringon conversions are not expected to be completed until 1999. Certain conversion projects currently under consideration could require, if they materialize, capital expenditures or other cash requirements not included in the above estimate. Factors that could cause actual capital expenditures to exceed materially the planned capital expenditures include delays and cost overruns in shipyards, shortages and delays in the delivery of key rig equipment necessary for conversion projects, latent damage or deterioration to hulls, requirements for equipment and machinery in excess of engineering estimates and assumptions, and changes in design criteria or specifications during repair or construction.

On May 12, 1997, the Company announced that its Board of Directors authorized the repurchase of up to 10,000,000 shares of the Company's common stock, or approximately eight percent of its then outstanding common stock. As of December 31, 1997, the Company had repurchased 2,186,000 shares of common stock at a total cost of $52,181,000. Additional purchases, if any, would be made from time to time on the open market or in private transactions at prices determined by the Company.

Subsequent to December 31, 1997, the Company entered into various foreign currency exchange contracts in order to reduce its exposure to fluctuations in foreign exchange rates. These contracts expire monthly throughout 1998 and require the Company to exchange U.S. Dollars for Dutch Guilders and British Pounds Sterling totaling $33,800,000 and $24,700,000, respectively. Gains and losses, if any, on these contracts will be recognized pursuant to the provisions of Statement of Financial Accounting Standards ("SFAS") No. 52, Foreign Currency Translation.

CREDIT FACILITIES AND LONG-TERM DEBT

The Company entered into a credit agreement dated August 14, 1997 (the "Credit Agreement") with a group of banks. The Credit Agreement provides for a five-year unsecured revolving credit facility in the amount of $200,000,000. Loans under the Credit Agreement bear interest, at the option of the Company, at a base rate or LIBOR plus a margin (0.40 percent currently). The Credit Agreement provides for commitment fees of 0.125 percent on the unused portion of the facility. The interest rate and commitment fee rate vary depending on the Company's public senior secured debt rating or its funded debt to capital ratio. The Credit Agreement requires compliance with various covenants, including minimum consolidated net worth, interest coverage ratios, leverage ratios and fleet coverage ratios. At December 31, 1997, the Company had lines of credit totaling $205,000,000 of which $2,397,000 had been used to support outstanding letters of credit. Additionally, at December 31, 1997, $18,567,745 of outstanding letters of credit had been supported through a combination of unsecured letter of credit facilities and surety bonds. As of March 12, 1998, the Company had an outstanding balance of $60,000,000 under the Credit Agreement.

On May 14, 1997, the Company commenced a tender offer to purchase for cash all $84,445,000 principal amount then outstanding of its 9 1/4% Senior Notes. During 1997, the Company acquired $110,885,000 principal amount of its 9 1/4% Senior Notes, of which $81,330,000 was purchased pursuant to the tender offer. After giving effect to the purchases, the Company had $3,115,000 principal amount of 9 1/4% Senior Notes outstanding at December 31, 1997.

22

The Company believes that its cash and cash equivalents, cash generated from operations, borrowings under its lines of credit and access to other financing sources will be adequate to meet its anticipated short-term and long-term liquidity requirements, including scheduled debt repayments.

YEAR 2000

In 1996, the Company implemented a major computer software conversion for its management and accounting information systems. The new system is generally considered to be year 2000 compliant, however, the Company uses other systems which have not yet been reviewed to adequately determine whether or not they will function properly in the year 2000. In 1998, the Company will commence a project to assess all remaining systems for year 2000 compliance. The Company expects its year 2000 assessment to be completed on a timely basis and plans to review the compliance efforts of the entities it does business with. The discussion of the Company's efforts, and management's expectations, relating to Year 2000 compliance are forward-looking statements. The Company's ability to achieve Year 2000 compliance and the level of incremental costs associated therewith, could be adversely impacted by, among other things, the availability and cost of programming and testing resources, vendors' ability to modify proprietary software and unanticipated problems identified in the ongoing compliance review. The Company has limited or no control over the actions of proprietary software vendors and other entities with which it interacts.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

For information on certain foreign currency exchange contracts entered into by the Company after December 31, 1997, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resources - Overview". For information on the fair value of the Company's long-term debt at December 31, 1997, see Note 5 of Notes to Consolidated Financial Statements included elsewhere herein.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The following financial statements are filed in this Item 8:

Report of Independent Accountants

Consolidated Balance Sheets at December 31, 1997 and 1996

Consolidated Statements of Operations for each of the three years in the period ended December 31, 1997

Consolidated Statements of Cash Flows for each of the three years in the period ended December 31, 1997

Consolidated Statements of Shareholders' Equity for each of the three years in the period ended December 31, 1997

Notes to Consolidated Financial Statements

23

REPORT OF INDEPENDENT ACCOUNTANTS

To the Board of Directors and Shareholders of Noble Drilling Corporation

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of operations, of cash flows and of changes in shareholders' equity present fairly, in all material respects, the financial position of Noble Drilling Corporation and its subsidiaries (the "Company") at December 31, 1997 and 1996, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 1997, in conformity with generally accepted accounting principles. These financial statements are the responsibility of the Company's management; our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these statements in accordance with generally accepted auditing standards which require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for the opinion expressed above.

/s/ Price Waterhouse LLP

Houston, Texas
January 29, 1998

24

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
(In thousands, except par value amount)

                                                                                         DECEMBER 31,
                                                                                  ----------------------------
                                                                                     1997             1996
                                                                                  -----------      -----------
ASSETS
CURRENT ASSETS
  Cash and cash equivalents .................................................     $    49,917      $   149,632
  Restricted cash ...........................................................              --            2,000
  Investment in marketable equity securities ................................              --            2,533
  Investment in marketable debt securities ..................................          16,471           19,296
  Accounts receivable (net allowance of $1,380 and $1,494) ..................         135,716          101,619
  Costs of uncompleted contracts in excess of billings ......................             941           18,505
  Inventories ...............................................................           4,559            3,287
  Deferred income taxes .....................................................             391           39,248
  Prepaid expenses ..........................................................          21,569           19,572
  Other current assets ......................................................          35,451           32,785
                                                                                  -----------      -----------
Total current assets ........................................................         265,015          388,477
                                                                                  -----------      -----------

PROPERTY AND EQUIPMENT
  Drilling equipment and facilities .........................................       1,433,241        1,176,145
  Other .....................................................................          24,287           27,924
                                                                                  -----------      -----------
                                                                                    1,457,528        1,204,069
  Accumulated depreciation ..................................................        (256,613)        (247,035)
                                                                                  -----------      -----------
                                                                                    1,200,915          957,034
                                                                                  -----------      -----------
INVESTMENT IN AND NOTES RECEIVABLE FROM AFFILIATES ..........................          21,097            9,188
DEFERRED INCOME TAXES .......................................................           5,947            2,296

OTHER ASSETS ................................................................          12,837           10,178
                                                                                  -----------      -----------
                                                                                  $ 1,505,811      $ 1,367,173
                                                                                  ===========      ===========
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
  Short-term debt and current installments of long-term debt ................     $     9,698      $     3,622
  Accounts payable ..........................................................          77,366           66,906
  Accrued payroll and related costs .........................................          25,858           28,475
  Taxes payable .............................................................          23,708           20,304
  Interest payable ..........................................................           6,088            8,557
  Other current liabilities .................................................          10,172           23,636
                                                                                  -----------      -----------
Total current liabilities ...................................................         152,890          151,500

LONG-TERM DEBT ..............................................................         138,139          239,272
DEFERRED INCOME TAXES .......................................................          63,946           50,331
OTHER LIABILITIES ...........................................................           1,782              821
                                                                                  -----------      -----------
                                                                                      356,757          441,924
                                                                                  -----------      -----------
SHAREHOLDERS' EQUITY
  Common stock-par value $0.10; 200,000 shares authorized;
    133,335 issued and 130,988 outstanding in 1997; 132,189 issued
    and 131,980 outstanding in 1996 .........................................          13,334           13,219
  Capital in excess of par value ............................................         934,383          916,004
  Unrealized gains (losses) on marketable debt securities ...................              16              (35)
  Cumulative translation adjustment .........................................          (1,127)            (882)
  Retained earnings (accumulated deficit) ...................................         255,992           (1,205)
  Treasury stock, at cost ...................................................         (53,544)          (1,852)
                                                                                  -----------      -----------
                                                                                    1,149,054          925,249
                                                                                  -----------      -----------
COMMITMENTS AND CONTINGENCIES (Note 11) .....................................              --               --
                                                                                  -----------      -----------
                                                                                  $ 1,505,811      $ 1,367,173
                                                                                  ===========      ===========

See accompanying notes to the consolidated financial statements.

25

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share amounts)

                                                                 YEAR ENDED DECEMBER 31,
                                                       ------------------------------------------
                                                          1997            1996            1995
                                                       ----------      ----------      ----------
OPERATING REVENUES
  Contract drilling services .....................     $  468,980      $  350,008      $  205,110
  Labor contract drilling services ...............         49,076          33,425          35,136
  Turnkey drilling services ......................        180,863         114,948          71,273
  Engineering and consulting services ............          2,606           4,954          11,264
  Other revenue ..................................         11,670          10,918           5,185
                                                       ----------      ----------      ----------
                                                          713,195         514,253         327,968
                                                       ----------      ----------      ----------
OPERATING COSTS AND EXPENSES
  Contract drilling services .....................        179,319         216,597         138,340
  Labor contract drilling services ...............         34,536          25,310          26,540
  Turnkey drilling services ......................        164,913          80,777          64,471
  Engineering and consulting services ............          1,908           3,387           7,311
  Other expense ..................................          6,405           5,511           3,440
  Depreciation and amortization ..................         77,922          52,159          36,492
  Selling, general and administrative ............         64,777          54,504          40,139
  Minority interest ..............................           (256)           (428)           (214)
  Gains on sales of property and equipment,
     net of impairments ..........................       (197,676)        (36,115)           (829)
                                                       ----------      ----------      ----------
                                                          331,848         401,702         315,690
                                                       ----------      ----------      ----------

OPERATING INCOME .................................        381,347         112,551          12,278

OTHER INCOME (EXPENSE)
  Interest expense ...............................        (12,894)        (18,758)        (12,156)
  Interest income ................................          9,356           6,409           5,323
  Other, net .....................................          1,804           1,757            (579)
                                                       ----------      ----------      ----------

INCOME BEFORE INCOME TAXES AND
  EXTRAORDINARY CHARGE ...........................        379,613         101,959           4,866

INCOME TAX PROVISION .............................       (115,731)        (22,662)         (3,272)
                                                       ----------      ----------      ----------

INCOME BEFORE EXTRAORDINARY CHARGE ...............        263,882          79,297           1,594

EXTRAORDINARY CHARGE, NET OF TAX .................         (6,685)           (660)             --
                                                       ----------      ----------      ----------

NET INCOME .......................................        257,197          78,637           1,594

PREFERRED STOCK DIVIDENDS ........................             --          (6,040)         (7,199)
                                                       ----------      ----------      ----------

NET INCOME (LOSS) APPLICABLE TO
  COMMON SHARES ..................................     $  257,197      $   72,597      $   (5,605)
                                                       ==========      ==========      ==========

NET INCOME (LOSS) APPLICABLE TO COMMON
  SHARES PER SHARE-BASIC:
  Income (loss) before extraordinary charge ......     $     2.00      $     0.68      $    (0.08)
  Extraordinary charge ...........................          (0.05)          (0.01)             --
                                                       ----------      ----------      ----------
  Net income (loss) applicable to common shares ..     $     1.95      $     0.67      $    (0.08)
                                                       ==========      ==========      ==========

NET INCOME (LOSS) APPLICABLE TO COMMON
  SHARES PER SHARE-ASSUMING DILUTION:
  Income (loss) before extraordinary charge ......     $     1.98      $     0.67      $    (0.08)
  Extraordinary charge ...........................          (0.05)          (0.01)             --
                                                       ----------      ----------      ----------
  Net income (loss) applicable to common shares ..     $     1.93      $     0.66      $    (0.08)
                                                       ==========      ==========      ==========

See accompanying notes to the consolidated financial statements.

26

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)

                                                                                    YEAR ENDED DECEMBER 31,
                                                                           ------------------------------------------
                                                                              1997            1996            1995
                                                                           ----------      ----------      ----------
CASH FLOWS FROM OPERATING ACTIVITIES
  Net income .........................................................     $  257,197      $   78,637      $    1,594
  Adjustments to reconcile net income to net cash
    provided by operating activities:
    Depreciation and amortization ....................................         77,922          52,159          36,492
    Gains on sales of property and equipment, net of impairments .....       (197,676)        (36,115)           (829)
    Inventory charge .................................................             --          14,808              --
    Gain on foreign exchange .........................................             --            (310)           (206)
    Deferred income tax provision (benefit) ..........................         48,821           6,596            (917)
    Extraordinary charge, net of tax .................................          6,685             660              --
    Compensation expense from stock-based plans ......................          7,036             937              --
    Other ............................................................            738          (2,267)            300
    Changes in current assets and liabilities:
      Accounts receivable ............................................        (38,023)        (18,752)         (8,480)
      Proceeds from sale of marketable equity securities, net ........          2,353           5,615           3,398
      Other assets ...................................................         32,591          (6,783)        (17,061)
      Accounts payable ...............................................          6,217          16,178          11,356
      Other liabilities ..............................................            101          27,016           3,836
                                                                           ----------      ----------      ----------
       Net cash provided by operations ...............................        203,962         138,379          29,483
                                                                           ----------      ----------      ----------

CASH FLOWS FROM INVESTING ACTIVITIES
  Purchase of property and equipment .................................       (391,065)       (216,887)        (91,202)
  Acquisition of Neddrill, net of cash acquired ......................             --        (284,726)             --
  Proceeds from sale of property and equipment .......................        271,764         103,500           1,879
  Proceeds from sale of (investment in)
    marketable debt securities .......................................          2,870          (2,192)         24,374
  Proceeds from insurance settlement .................................             --          14,142              --
  Investment in and advances to unconsolidated affiliates ............        (11,831)           (410)             --
                                                                           ----------      ----------      ----------
       Net cash used by investing activities .........................       (128,262)       (386,573)        (64,949)
                                                                           ----------      ----------      ----------

CASH FLOWS FROM FINANCING ACTIVITIES
  Preferred stock conversion costs ...................................             --             (31)         (2,406)
  Proceeds from long-term debt .......................................             --         121,470              --
  Payment of long-term debt ..........................................       (128,787)        (26,130)           (520)
  Proceeds from issuance of common stock, net ........................          5,774         271,312             356
  Dividends paid on preferred stock ..................................             --          (7,549)         (8,881)
  Purchase of shares returned to treasury stock ......................        (52,181)         (2,250)             --
  Payment of short-term debt .........................................             --              --          (6,698)
  Other ..............................................................             --              --             898
                                                                           ----------      ----------      ----------
       Net cash (used) provided by financing activities ..............       (175,194)        356,822         (17,251)

EFFECT OF EXCHANGE RATE CHANGES ON CASH ..............................           (221)           (303)         (1,139)
                                                                           ----------      ----------      ----------

(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS .....................        (99,715)        108,325         (53,856)

CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR .........................        149,632          41,307          95,163
                                                                           ----------      ----------      ----------

CASH AND CASH EQUIVALENTS, END OF YEAR ...............................     $   49,917      $  149,632      $   41,307
                                                                           ==========      ==========      ==========

See accompanying notes to the consolidated financial statements.

27

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
(In thousands)

                                                          $2.25 PREFERRED STOCK     $1.50 PREFERRED STOCK       COMMON STOCK
                                                          ----------------------    ---------------------   ---------------------
                                                           SHARES       AMOUNT       SHARES      AMOUNT      SHARES      AMOUNT
                                                          ---------    ---------    ---------   ---------   ---------   ---------
JANUARY 1, 1995 .......................................       2,989    $   2,989        4,025   $   4,025      78,076   $   7,808

Net income ............................................          --           --           --          --          --          --
Conversion/redemption of preferred stock ..............      (2,989)      (2,989)          --          --      16,199       1,620
Preferred stock conversion costs ......................          --           --           --          --          --          --
Net unrealized losses on marketable securities ........          --           --           --          --          --          --
Minimum pension liability .............................          --           --           --          --          --          --
Translation adjustment ................................          --           --           --          --          --          --
Dividends on preferred stock ..........................          --           --           --          --          --          --
Issuance of stock:
  Exercise of stock options ...........................          --           --           --          --         109          11
  Contribution to benefit plans .......................          --           --           --          --         164          16
  Contribution of treasury stock to
    restricted stock plan .............................          --           --           --          --          --          --
  Restricted stock plan shares returned to treasury ...          --           --           --          --          --          --
                                                          ---------    ---------    ---------   ---------   ---------   ---------
DECEMBER 31, 1995 .....................................          --           --        4,025       4,025      94,548       9,455

Net income ............................................          --           --           --          --          --          --
Conversion/redemption of preferred stock ..............          --           --       (4,025)     (4,025)      9,836         984
Net unrealized losses on marketable securities ........          --           --           --          --          --          --
Minimum pension liability .............................          --           --           --          --          --          --
Translation adjustment ................................          --           --           --          --          --          --
Dividends on preferred stock ..........................          --           --           --          --          --          --
Issuance of stock:
  Sale of common stock ................................          --           --           --          --      21,850       2,185
  Purchase of Neddrill ................................          --                                             5,000         500
  Settlement of Triton purchase contingency ...........          --           --           --          --          67           7
  Exercise of stock options ...........................          --           --           --          --         602          60
  Contribution to benefit plans .......................          --           --           --          --         286          28
  Contribution of treasury stock to
    restricted stock plan .............................          --           --           --          --          --          --
  Restricted stock plan shares returned to treasury ...          --           --           --          --          --          --
                                                          ---------    ---------    ---------   ---------   ---------   ---------
DECEMBER 31, 1996 .....................................          --           --           --          --     132,189      13,219

Net income ............................................          --           --           --          --          --          --
Net unrealized losses on marketable securities ........          --           --           --          --          --          --
Translation adjustment ................................          --           --           --          --          --          --
Earned compensation from performance
    restricted stock ..................................          --           --           --          --          --          --
Issuance of stock:
  Settlement of Triton purchase contingency ...........          --           --           --          --          76           8
  Exercise of stock options ...........................          --           --           --          --         951          95
  Contribution to benefit plans .......................          --           --           --          --          60           6
  Issuance of restricted shares .......................          --           --           --          --          59           6
  Contribution of treasury stock to
    restricted stock plan .............................          --           --           --          --          --          --
  Restricted stock plan shares returned to treasury ...          --           --           --          --          --          --
  Repurchase common stock .............................          --           --           --          --          --          --
  Directors' fees paid with treasury stock ............          --           --           --          --          --          --
  Stock option tax deduction ..........................          --           --           --          --          --          --
                                                          ---------    ---------    ---------   ---------   ---------   ---------
DECEMBER 31, 1997 .....................................          --    $      --           --   $      --     133,335   $  13,334
                                                          =========    =========    =========   =========   =========   =========

See accompanying notes to the consolidated financial statements.

28

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (CONTINUED)
(In thousands)

                 UNREALIZED
                    GAINS                                         RETAINED
  CAPITAL        (LOSSES) ON      MINIMUM        CUMULATIVE       EARNINGS            TREASURY STOCK
IN EXCESS OF     MARKETABLE       PENSION       TRANSLATION     (ACCUMULATED    ----------------------------
 PAR VALUE       SECURITIES      LIABILITY       ADJUSTMENT       DEFICIT)         SHARES          AMOUNT
------------    ------------    ------------    ------------    ------------    ------------    ------------
$    590,733    $     (1,847)   $     (3,825)   $     (2,325)   $    (68,197)            250    $     (1,750)

          --              --              --              --           1,594              --              --
       1,369              --              --              --              --              --              --
      (2,406)             --              --              --              --              --              --
          --           1,732              --              --              --              --              --
          --              --             422              --              --              --              --
          --              --              --             244              --              --              --
          --              --              --              --          (7,199)             --              --

         345              --              --              --              --              --              --
       1,123              --              --              --              --              --              --

      (1,480)             --              --              --              --            (211)          1,480
         182              --              --              --              --              26            (182)
------------    ------------    ------------    ------------    ------------    ------------    ------------
     589,866            (115)         (3,403)         (2,081)        (73,802)             65            (452)

          --              --              --              --          78,637              --              --
       3,012              --              --              --              --              --              --
          --              80              --              --              --              --              --
          --              --           3,403              --              --              --              --
          --              --              --           1,199              --              --              --
          --              --              --              --          (6,040)             --              --

     266,261              --              --              --              --              --              --
      49,500              --              --              --              --              --              --
       1,003              --              --              --              --              --              --
       2,806              --              --              --              --              --              --
       4,406              --              --              --              --              --              --

        (850)             --              --              --              --            (109)            850
          --              --              --              --              --             253          (2,250)
------------    ------------    ------------    ------------    ------------    ------------    ------------
     916,004             (35)             --            (882)         (1,205)            209          (1,852)

          --              --              --              --         257,197              --              --
          --              51              --              --              --              --              --
          --              --              --            (245)             --              --              --

       3,256              --              --              --              --              --              --

       1,335              --              --              --              --              --              --
       5,679              --              --              --              --              --              --
       1,043              --              --              --              --              --              --
         826              --              --              --              --              --              --

        (793)             --              --              --              --             (88)            793
         423              --              --              --              --              44            (423)
          --              --              --              --              --           2,186         (52,181)
          --              --              --              --              --              (4)            119
       6,610              --              --              --              --              --              --
============    ============    ============    ============    ============    ============    ============
$    934,383    $         16    $         --    $     (1,127)   $    255,992           2,347    $    (53,544)
============    ============    ============    ============    ============    ============    ============

See accompanying notes to the consolidated financial statements.

29

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

NOTE 1 -- ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

ORGANIZATION AND BUSINESS

Noble Drilling Corporation ("Noble Drilling" or, together with its consolidated subsidiaries, unless the context requires otherwise, the "Company") is primarily engaged in domestic and international contract oil and gas drilling and workover operations. The Company's international operations are conducted in Canada, the North Sea, Mexico, Africa, South America, the Middle East and India.

CONSOLIDATION

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The equity method of accounting is used for investments in affiliates where the Company has a significant influence but not a controlling interest.

Certain reclassifications have been made in prior year consolidated financial statements to conform to the classifications used in the 1997 consolidated financial statements. These reclassifications have no impact on net income or loss.

FOREIGN CURRENCY TRANSLATION

The Company follows a translation policy in accordance with Statement of Financial Accounting Standards ("SFAS") No. 52, Foreign Currency Translation ("SFAS 52"). The U.S. dollar has been designated as the functional currency where appropriate based on an evaluation of such factors as the markets in which the subsidiary operates, generation of cash flow, financing activities and intercompany arrangements. Assets and liabilities are translated at the rates of exchange on the balance sheet date. Income and expense items are translated at average rates of exchange. The resulting gains or losses arising from the translation of accounts from the functional currency to the U.S. Dollar are included as a separate component of shareholders' equity designated as cumulative translation adjustment.

Subsequent to December 31, 1997, the Company entered into various foreign currency exchange contracts in order to reduce its exposure to fluctuations in foreign exchange rates. These contracts expire monthly throughout 1998 and require the Company to exchange U.S. Dollars for Dutch Guilders and British Pounds Sterling totaling $33,800,000 and $24,700,000, respectively. Gains and losses, if any, on these contracts will be recognized pursuant to the provisions of SFAS 52.

CASH AND CASH EQUIVALENTS

Cash and cash equivalents include cash on hand, demand deposits with banks and all highly liquid investments with original maturities of three months or less.

In accordance with SFAS No. 95, Statement of Cash Flows, cash flows from the Company's operations in the United Kingdom are calculated based on its functional currency. As a result, amounts related to assets and liabilities reported on the Consolidated Statements of Cash Flows will not necessarily agree with changes in the corresponding balances on the Consolidated Balance Sheets. The effect of exchange rate changes on cash balances held in foreign currencies is reported on a separate line below cash provided (used) by financing activities.

INVENTORIES

Inventories are stated principally at average cost. As a result of the Company's asset rationalization program and the July 1, 1996 acquisition of Neddrill (see Note 2), during the fourth quarter of 1996, the Company

30

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

reviewed the status of its inventories. The Company determined certain adjustments were appropriate to properly reflect the estimated net realizable value of these assets. These adjustments consisted primarily of write-downs for inventory obsolescence totaling approximately $14,808,000 and reclassifications of approximately $16,555,000 to property and equipment to better reflect their economic lives and to be consistent with other assets owned by the Company. The inventory write-down is included in "Contract drilling services" expense in the Consolidated Statement of Operations for the year ended December 31, 1996.

PROPERTY AND EQUIPMENT

Property and equipment is stated at cost, reduced by provisions to recognize economic impairment in value when management determines that such impairment has occurred. Maintenance and repair costs are charged to expense as incurred, while major replacements and improvements are capitalized. Total maintenance and repair expenses for the years ended December 31, 1997, 1996 and 1995, were approximately $44,100,000, $41,759,000 and $26,189,000, respectively. Included in costs of drilling equipment and facilities is an allocation of interest incurred during the period that rigs are under construction or refurbishment. Interest capitalized for the year ended December 31, 1997 totaled $4,218,000 and is shown net of interest expense in the Consolidated Statement of Operations. No interest was capitalized during 1996 and 1995. When assets are sold, retired or otherwise disposed of, the cost and related accumulated depreciation are eliminated from the accounts and the gain or loss is recognized.

Drilling equipment and facilities are depreciated using the straight-line method over estimated remaining useful lives as of the in-service date or date of major refurbishment. Estimated useful lives of the Company's drilling equipment and facilities range from three to twenty five years. Other property and equipment is depreciated using the straight-line method over useful lives ranging from two to twenty years.

Effective January 1, 1995, the Company revised its estimates of salvage values and remaining depreciable lives of certain rigs to better reflect their economic lives and to be consistent with other similar assets owned by the Company. The effect of this change in estimates was a reduction in the net loss applicable to common shares of $6,160,000, or $0.07 per common share, for the year ended December 31, 1995.

LONG-LIVED ASSETS

The Company evaluates the realizability of its long-lived assets, including property and equipment and goodwill, whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. An impairment loss is recognized when estimated cash flows expected to result from the use of the asset and its eventual disposition is less than its carrying amount.

In the fourth quarter of 1996, the Company reviewed the status of the NN-1. As of December 31, 1996, the NN-1 had not been under contract since March of 1993. Given the strength of the international markets in 1996 and the expected continued strength in 1997, coupled with the Company's unsuccessful marketing efforts with respect to the NN-1, recoverability of the NN-1 was considered doubtful. The Company considered expected future cash flows over the remaining life of the rig and determined that the NN-1 was impaired. Accordingly, an impairment charge of $10,200,000 (excluding a $289,000 reduction for minority interest) was recorded in the fourth quarter of 1996. The net book value of the NN-1 was $1,022,000 at December 31, 1996. The impairment charge is included in "Gains on sales of property and equipment, net of impairments" in the Consolidated Statement of Operations for the year ended December 31, 1996. The NN-1 was sold on May 7, 1997 as part of the mat rig sale to Pride Petroleum Services, Inc. ("Pride"). See Note 2.

In 1995, a jackup rig lost two legs during mobilization to West Africa. The third leg of the rig was removed prior to towing to the U.S. Gulf of Mexico for a complete damage evaluation. A charge of $1,778,000 related to the cost of mobilization was recorded in the fourth quarter of 1995. After evaluation of the rig, the Company negotiated a constructive total loss with its insurance underwriters and received $14,142,000 in net proceeds for the insurance settlement. There was no material gain or loss recorded as a result of the insurance settlement.

31

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

OTHER ASSETS

The excess of cost over the fair value of net tangible assets acquired in the acquisition of Triton Engineering Services Company ("Triton") is being amortized over nine years. Amortization expense for goodwill was $213,000, $213,000 and $70,000 for the years ended December 31, 1997, 1996 and 1995, respectively. Accumulated amortization of goodwill was $496,000 and $283,000 at December 31, 1997 and 1996, respectively. Prepaid insurance is amortized over the term of the insurance policy. Deferred debt issuance costs, which totaled $2,766,000 at December 31, 1997, are being amortized over the life of the debt securities. Amortization related to debt issuance costs was, $493,000, $526,000 and $404,000 for the years ended December 31, 1997, 1996 and 1995, respectively.

REVENUE RECOGNITION

Revenues generated from the Company's dayrate-basis drilling contracts are recognized as services are performed. The Company's turnkey drilling contracts are of a short-term, fixed fee nature, and accordingly, revenues and expenses are recognized using the completed contract method. The Company may receive lump-sum fees for the mobilization of equipment and personnel. The net of mobilization fees received and costs incurred to mobilize an offshore rig from one market to another is recognized over the term of the related drilling contract. Absent a contract, mobilization costs are recognized currently. Lump-sum payments received from customers relating to specific contracts are deferred and amortized to income over the term of the drilling contract. Provisions for future losses on turnkey contracts are recognized when it becomes apparent that expenses to be incurred on a specific contract will exceed the revenue from the contract.

CONCENTRATION OF CREDIT RISK

The primary market for the Company's services is the offshore oil and gas industry, and the Company's customers consist primarily of major oil companies, independent oil and gas producers and government-owned oil companies. The Company performs ongoing credit evaluations of its customers and generally does not require material collateral. The Company maintains reserves for potential credit losses when necessary. Results of operations and financial condition of the Company should be considered in light of the fluctuations in demand experienced by drilling contractors as changes in oil and gas producers' expectations and budgets occur. These fluctuations can impact the Company's results of operations and financial condition as supply and demand factors directly affect utilization and dayrates, which are the primary determinants of cash flow from the Company's operations.

There were no customers that accounted for more than 10 percent of the Company's consolidated operating revenues during 1997 and 1996. One customer accounted for approximately 11 percent of the Company's consolidated operating revenues during 1995.

NET INCOME (LOSS) APPLICABLE TO COMMON SHARES PER SHARE

The Company has adopted SFAS No. 128, Earnings Per Share ("SFAS 128"), which established new guidelines for computing and presenting earnings per share. All prior period earnings per share data have been restated to conform to the provisions of SFAS 128. Net income (loss) applicable to common shares per share has been computed on the basis of the weighted average number of common shares and, where dilutive, common share equivalents, outstanding during the indicated periods.

32

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

The following table reconciles the basic and diluted earnings per share computations for income before extraordinary charge for the years ended December 31, 1997, 1996 and 1995:

                                                           INCOME
                                                           (LOSS)
        INCOME BEFORE    PREFERRED       PREFERRED       APPLICABLE
        EXTRAORDINARY      STOCK         CONVERSION       TO COMMON         BASIC          BASIC          DILUTED          DILUTED
           CHARGE        DIVIDENDS        PAYMENT          SHARES          SHARES           EPS            SHARES            EPS
         --------------------------------------------------------------------------------------------------------------------------
1997     $  263,882      $       --      $       --      $  263,882         131,791      $     2.00         133,455      $     1.98
1996     $   79,297      $   (6,040)     $       --      $   73,257         108,290      $     0.68         109,581      $     0.67
1995     $    1,594      $   (7,199)     $   (1,524)     $   (7,129)         88,873      $    (0.08)         88,873      $    (0.08)

Included in diluted shares are common stock equivalents relating to outstanding stock options of 1,664,000 and 1,291,000 for the years ended December 31, 1997 and 1996, respectively.

Since the numerator of the basic earnings per share computation for the year ended December 31, 1995 is a loss applicable to common shares of $7,129,000, no potential common shares are included in the computation of diluted earnings per share because the effect is antidilutive. In March 1995, an aggregate of 923,862 shares of $2.25 Preferred Stock were converted into 5,006,830 shares of Noble Drilling common stock. The Company paid approximately $1,524,000 in cash ("Preferred Conversion Payment") in the first quarter of 1995 in connection with this conversion. The Preferred Conversion Payment was accounted for as a reduction of net earnings applicable to common shares for purposes of computing the net loss applicable to common shares per share for the year ended December 31, 1995.

SUPPLEMENTAL CASH FLOW INFORMATION

                                                        YEAR ENDED DECEMBER 31,
                                                  ----------------------------------
                                                    1997         1996         1995
                                                  --------     --------     --------
Cash paid during the period for:
  Interest (net of amounts capitalized) .....     $ 15,363     $ 13,061     $ 11,738
  Income taxes ..............................     $ 49,737     $  6,471     $  3,946
Noncash investing and financing activities:
  Insurance financing agreement .............     $ 26,120     $  1,214     $ 14,838
  Neddrill acquisition with common stock ....     $     --     $ 50,000     $     --

CERTAIN SIGNIFICANT ESTIMATES

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. Actual results could differ from those estimates.

ACCOUNTING PRONOUNCEMENTS

In June 1997, the FASB issued SFAS No. 130, Reporting Comprehensive Income ("SFAS 130") and SFAS No. 131, Disclosure about Segments of an Enterprise and Related Information ("SFAS 131"). SFAS 130 established standards for reporting and displaying comprehensive income and its components in general-purpose financial statements. Comprehensive income includes net income and several other items that current accounting standards require to be recognized outside of the Statement of Operations. SFAS 131 requires public business enterprises to report certain information about their operating segments; report certain enterprise-wide information about their products and services, their activities in different geographic areas, and their reliance on major customers; and disclose certain segment information in their interim financial statements. These statements are effective for fiscal years beginning after December 15, 1997 and will not have an effect on the Company's results of operations or financial position.

33

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

NOTE 2 -- ACQUISITIONS, MERGERS AND DISPOSITIONS

On July 1, 1996, the Company completed the agreement of sale and purchase with Royal Nedlloyd N.V. ("Nedlloyd") and its wholly owned subsidiary, Neddrill Holding B.V., to acquire the assets utilized in the offshore contract drilling, accommodation and other gas exploration and production related service businesses of Nedlloyd's offshore drilling division ("Neddrill"), including the acquisition of $28,000,000 in net working capital, and the personnel employed by Neddrill. The purchase price was $300,000,000 in cash plus 5,000,000 shares of Noble Drilling common stock. The cash portion of the purchase price was financed by the issuance and sale of 21,850,000 shares of Noble Drilling common stock and $125,000,000 principal amount of 9 1/8% Senior Notes due 2006 (the "9 1/8% Senior Notes"). The net proceeds from the public offerings of securities in excess of the $300,000,000 cash portion of the purchase price were added to the Company's working capital.

The Neddrill acquisition was accounted for using the purchase method of accounting and Neddrill's results of operations are included in the Consolidated Statements of Operations from the date of the acquisition. The respective assets and liabilities have been recorded at their estimated fair value at the date of acquisition, and the allocation of the purchase price is based on the best estimates of the Company.

The following table provides selected consolidated financial information for the Company on a pro forma basis assuming that the Neddrill acquisition, the issuance of 21,850,000 shares of common stock and $125,000,000 principal amount of the 9 1/8% Senior Notes and the application of the net proceeds therefrom had occurred on January 1, 1995. The unaudited pro forma information set forth below is not necessarily indicative of what the Company's results of operations would have been had the transactions been consummated as of January 1, 1995, nor is such information necessarily indicative of the Company's future results of operations.

                                                             YEAR ENDED DECEMBER 31,
                                                             ---------------------
                                                               1996         1995
                                                             --------     --------
                                                                 (Unaudited)
Operating revenues .......................................   $596,090     $449,493
Net income applicable to common shares ...................   $ 83,705     $  2,524
Net income applicable to common shares per share-Diluted..   $   0.68     $   0.01

The Company purchased the Noble Homer Ferrington (formerly the Shelf
4), a Friede & Goldman 9500 Enhanced Pacesetter semisubmersible rig, in December 1996 for $6,000,000 in cash. The rig is currently located in the U.S. Gulf of Mexico. The Company has entered into a letter of intent with two operators to utilize the unit in the Gulf of Mexico. Upon completion of an upgrade, the rig will be capable of drilling in water depths up to 6,000 feet in a moored configuration. The initial term of the drilling contract would be for five years. The Company will be required to make significant capital expenditures to refurbish and upgrade the rig. Completion of the upgrade and delivery of the unit is expected for the fourth quarter of 1999.

In December 1996, the Company purchased the Noble Jimmy Puckett (formerly the Essar Explorer), a 300-foot Friede & Goldman L-780 Mod II independent leg cantilevered unit built in 1982, for $35,400,000 in cash. The rig is currently operating under a charter agreement with the Oil and Natural Gas Corporation Ltd. of India through December 1998.

In September 1996, the Company purchased the Noble Kenneth Delaney (formerly the Miss Kitty), a Friede & Goldman L-780 Mod II independent leg cantilevered unit rated for a water depth of 300 feet, for $26,250,000 in cash. At December 31, 1997, the rig was undergoing refurbishment and upgrade prior to commencing work under a three-year contract for Qatar General Petroleum Corporation ("QGPC") in Qatar.

The Company purchased the Noble Chuck Syring (formerly the Dana), a Marathon LeTourneau 82-C independent leg cantilevered rig capable of drilling in 250 feet of water, in March 1996, for $15,800,000 in cash. The rig is currently operating under a long-term contract through October 1999 for QGPC in Qatar.

34

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

In February 1996, the Company purchased the Noble Gus Androes (formerly the Odin Explorer), a Levingston III-C independent leg cantilevered unit rated for a water depth of 300 feet, for $15,300,000 in cash. The rig has been refurbished and is under contract offshore Qatar with an international oil and gas company through October 1998.

On May 7, 1997, the Company completed the sale to Pride of its 12 mat supported jackup rigs for $268,818,000 in cash. The Company recognized a pre-tax gain of $197,676,000 in connection with the sale, which has been included in "Gains on asset sales, net of impairments" in the accompanying Consolidated Statement of Operations for the year ended December 31, 1997. Revenues, gross margin and operating income generated from the mat rigs were $35,155,000, $18,585,000 and $15,231,000, respectively, for the period from January 1, 1997 through May 7, 1997.

In December 1996, the Company completed the sale of its land drilling assets for $60,000,000 in cash to Nabors Industries, Inc. The assets sold consisted principally of ( i) 19 marketed land drilling rigs and 28 mothballed land drilling rigs, (ii) certain inventory related to the maintenance and operation of the rigs, (iii) leasehold interest and real property interest related to the maintenance and operation of the rigs and (iv) drilling contracts for the employment of the rigs in existence on the closing date. The Company recognized a pre-tax gain of $45,414,000 in connection with the sale which has been included in "Gains on sales of property and equipment, net of impairments" in the Consolidated Statement of Operations for the year ended December 31, 1996. Revenues, gross margin and operating income generated from the land drilling assets were $24,637,000, $6,733,000 and $3,025,000, respectively, for the year ended December 31, 1996.

The Company sold two of its posted barge rigs during the first quarter of 1996. The Gus Androes, located in the U.S. Gulf, was sold for $6,000,000. The Gene Rosser, located offshore Nigeria, was sold for $13,000,000. The Company recorded pre-tax gains of $4,815,000 and $2,712,000, respectively, related to the sales of these posted barge rigs. The Lewis Dugger and Chuck Syring posted barge rigs, which were located offshore Nigeria, were sold in August 1996 for $24,500,000 in cash and $7,500,000 in drill pipe credit. These two barges had been written down at March 31, 1996 to their estimated net realizable values based on then recent offers received for these assets from third parties, resulting in a pre-tax charge to earnings of $7,600,000. The gains on the sales of the four barge rigs net of the write-downs are included in "Gains on sales of property and equipment, net of impairments" in the Consolidated Statement of Operations for the year ended December 31, 1996.

NOTE 3 -- MARKETABLE SECURITIES

As of December 31, 1997, the Company classified all of its debt securities with original maturities of more than three months as available for sale. These investments are classified as marketable securities within current assets on the Consolidated Balance Sheets. The following table highlights information applicable to the Company's investments classified as available for sale as of December 31, 1997 and 1996:

                                                                           DECEMBER 31, 1997
                                                        ---------------------------------------------------------
                                                          AMORTIZED                             NET UNREALIZED
              DEBT SECURITY/MATURITY                        COST             FAIR VALUE             GAINS
---------------------------------------------------     --------------     ---------------    -------------------
U.S. Government Obligations
  Mature within 1 year..........................        $     16,455       $     16,471       $          16
                                                        ==============     ===============    ===================

                                                                           DECEMBER 31, 1996
                                                        ---------------------------------------------------------
                                                          AMORTIZED                             NET UNREALIZED
              DEBT SECURITY/MATURITY                        COST             FAIR VALUE         GAINS (LOSSES)
---------------------------------------------------     --------------     ---------------    -------------------
Corporate Obligations
  Mature within 1 year..........................        $      3,067       $      3,069       $           2

U.S. Government Obligations
  Mature within 1 year..........................              16,264             16,227                 (37)
                                                        ==============     ===============    ===================
Total...........................................        $     19,331       $     19,296       $         (35)
                                                        ==============     ===============    ===================

35

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

The net unrealized gains (losses) on debt securities of $16,000 and ($35,000) as of December 31, 1997 and 1996, respectively, are included as a reduction of shareholders' equity. Total realized losses related to short-term investments for the years ended December 31, 1997 and 1996 were $6,000 and $7,000, respectively.

The Company categorizes its investments in marketable equity securities as trading securities. There were no investments in marketable equity securities at December 31, 1997. Total proceeds from the sale of these securities were $2,353,000 and $5,615,000 for the years ended December 31, 1997 and 1996, respectively. Total realized gains on these equity investments for the years ended December 31, 1997 and 1996 were $1,168,000 and $669,000, respectively. Total net unrealized gains related to marketable equity investments for the year ended December 31, 1996, were $1,348,000.

NOTE 4 -- INVESTMENTS IN AFFILIATES

At December 31, 1997, the Company's investments in affiliates consisted of a 41 percent interest in Arktik Drilling Limited, Inc. ("Arktik") and a 50 percent interest in Noble Kvaerner Drilling Limited ("Noble Kvaerner"). The Company accounts for these investments using the equity method. Arktik is a Bahamian joint venture company that owns and operates the drillship Noble Muravlenko. Noble Kvaerner is a Bahamian joint venture company that operates an offshore jackup rig, the Noble Kolskaya. The total investment balance at December 31, 1997 was $688,000 and at December 31, 1996 was $410,000; equity in earnings was $78,000 and $0 for the years ended December 31, 1997 and 1996, respectively. There were no distributions or dividends received during the years ended December 31, 1997 and 1996.

The Noble Muravlenko refurbishment has been completed, with the exception of installing a blowout preventer, and it commenced operations as a workover unit in the fourth quarter of 1997 for Petroleo Brasiliero S.A. ("Petrobras"). Upon installation of a blowout preventer, the Noble Muravlenko will begin drilling operations with Petrobras under a five-year contract, with a one-year option to Petrobras. The total cost of the refurbishment is expected to be approximately $59,500,000. As of December 31, 1997, the Company had notes receivable from Arktik of $12,000,000 which are included in "Investment in and notes receivable from affiliates" in the accompanying Consolidated Balance Sheet. Such amount is expected to be repaid by Arktik over the term of the Petrobras contract.

The Noble Kolskaya was converted from accommodation mode into drilling mode during the second quarter of 1997, and it began working under a three-year contract in July 1997. The total cost of the conversion was approximately $18,800,000. As of December 31, 1997, the Company had notes receivable from Noble Kvaerner of $8,409,000 which are included in "Investment in and notes receivable from affiliates" in the accompanying Consolidated Balance Sheet. Noble Kvaerner is currently negotiating a credit agreement to provide for a $10,000,000 loan, the proceeds of which will be used to repay the Company's note receivable. Additionally, as of December 31, 1997, the Company had paid $3,900,000 of upgrade costs on behalf of one of the other Noble Kvaerner joint venturers. Such amount is included in "Other current assets" in the accompanying Consolidated Balance Sheet.

NOTE 5 -- DEBT

On July 1, 1996, in connection with the Neddrill acquisition and the issuance of 21,850,000 shares of Noble Drilling common stock in an underwritten public offering (the "1996 Stock Offering") (see Note 7), the Company issued $125,000,000 principal amount of 9 1/8% Senior Notes (the 1996 Stock Offering and the issuance of the 9 1/8% Senior Notes are collectively referred to as the "1996 Public Offerings"). The 9 1/8% Senior Notes will mature on July 1, 2006. Interest on the 9 1/8% Senior Notes is payable semi-annually on January 1 and July 1 of each year. The 9 1/8% Senior Notes are redeemable at the option of the Company, in whole or in part, at any time on or after July 1, 2001 at 104.56 percent of principal amount, declining ratably to par on or after July 1, 2004, plus accrued interest. The indenture governing the 9 1/8% Senior Notes contains certain restrictive covenants, including restrictions on dividends and certain investments and limitations on certain sale and lease-back transactions, transactions with affiliates, and mergers or consolidations.

36

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

In 1997, the Company entered into financing agreements with Transamerica Insurance Finance Corporation related to the renewal of its Marine Package, Protection and Indemnity and General Liability insurance policies for periods of 33 months, nine months and 21 months, respectively. Over the course of 1997, the Company financed a total of $26,120,000 related to these insurance polices. The fixed annual interest rates on the debt related to the Marine Package, Protection and Indemnity and General Liability insurance policies are 5.94 percent, 4.85 percent and 5.68 percent, respectively. The amount outstanding at December 31, 1997 includes $10,222,000, which is included in "Long-term debt", and $9,698,000, which is included in "Short-term debt and current installments of long-term debt", in the accompanying Consolidated Balance Sheet.

On October 7, 1993, the Company issued $125,000,000 principal amount of 9 1/4% Senior Notes Due 2003 (the "9 1/4% Senior Notes"). The 9 1/4% Senior Notes will mature on October 1, 2003. Interest on the 9 1/4% Senior Notes is payable semi-annually on April 1 and October 1 of each year. The 9 1/4% Senior Notes are redeemable at the option of the Company, in whole or in part, on or after October 1, 1998 at 103.47 percent of principal amount, declining ratably to par on or after October 1, 2001, plus accrued interest.

In November 1996, the Company purchased $11,000,000 principal amount of its 9 1/4% Senior Notes, which resulted in an extraordinary charge of $660,000, net of taxes of $355,000. The extraordinary charge represents the difference between the acquisition price and the net carrying value of the notes, including unamortized debt issuance costs. After giving effect to the purchase, the Company had $114,000,000 principal amount of 9 1/4% Senior Notes outstanding at December 31, 1996. During the first quarter of 1997, the Company purchased $29,555,000 principal amount of its 9 1/4% Senior Notes, which resulted in an extraordinary charge of $1,704,000, net of taxes of $918,000. On May 14, 1997, the Company announced a tender offer to purchase for cash all $84,445,000 principal amount then outstanding of its 9 1/4% Senior Notes. Pursuant to the tender offer, the Company purchased $81,330,000 principal amount of 9 1/4% Senior Notes during the second quarter of 1997, which resulted in an extraordinary charge of $4,981,000, net of taxes of $2,682,000. After giving effect to the purchases, the Company had $3,115,000 principal amount of 9 1/4% Senior Notes outstanding at December 31, 1997.

In connection with the initial construction of the jackup rig, NN-1, the predecessor of NN-1 Limited Partnership issued U.S. Government Guaranteed Ship Financing Sinking Fund Bonds, of which $1,026,000 principal amount was outstanding at December 31, 1996. On March 31, 1997, the Company redeemed the remaining $1,026,000 principal amount of U.S. Government Guaranteed Ship Financing Sinking Fund Bonds.

Annual maturities of long-term debt are $8,195,000 due in 1998, $7,991,000 due in 1999, $2,231,000 due in 2000, $3,115,000 due in 2003 and $125,000,000 due in 2006.

The following table summarizes the Company's long-term debt:

                                                                       DECEMBER 31,
                                                                 ------------------------
                                                                   1997            1996
                                                                 ---------      ---------
9 1/4% Senior Notes Due 2003 ................................... $   3,115      $ 114,000
9 1/8% Senior Notes due 2006, net of unamortized discount of
   $198 in 1997 and $234 in 1996 ...............................   124,802        124,766
U.S. Government Guaranteed Ship Financing Sinking Fund Bonds ...        --          1,026
Insurance financing ............................................    18,417          3,102
                                                                 ---------      ---------
                                                                   146,334        242,894
Current installments ...........................................    (8,195)        (3,622)
                                                                 ---------      ---------
                                                                 $ 138,139      $ 239,272
                                                                 =========      =========

37

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

The fair value of the Company's long-term debt at December 31, 1997 was $145,286,000, based on the quoted market prices for similar issues or on the current rates offered to the Company for debt of similar remaining maturities.

NOTE 6 -- CREDIT FACILITIES

The Company entered into a credit agreement dated August 14, 1997 (the "Credit Agreement") with a group of banks. The Credit Agreement provides for a five-year unsecured revolving credit facility in the amount of $200,000,000. Loans under the Credit Agreement bear interest, at the option of the Company, at either a base rate or LIBOR plus a margin (0.40 percent currently). The Credit Agreement provides for commitment fees of 0.125 percent on the unused portion of the facility. The interest rate and commitment fee rate vary depending on the Company's public senior secured debt rating or its funded debt to capital ratio. The Credit Agreement requires compliance with various covenants, including minimum consolidated net worth, interest coverage ratios, leverage ratios and fleet coverage ratios. At December 31, 1997, the Company had lines of credit totaling $205,000,000 of which $2,397,000 had been used to support outstanding letters of credit. Additionally, at December 31, 1997, $18,567,745 of outstanding letters of credit had been supported through a combination of unsecured letter of credit facilities and surety bonds. As of March 12, 1998, the Company had an outstanding balance of $60,000,000 under the Credit Agreement.

NOTE 7 -- SHAREHOLDERS' EQUITY

On July 1, 1996, the Company issued and sold 21,850,000 shares of common stock in the 1996 Stock Offering (see Note 5) at an initial price to the public of $13.00 per share. This resulted in net proceeds of $272,033,000, after deducting the underwriting discount and other related costs. The net proceeds of the 1996 Public Offerings (see Note 5) were used to purchase Neddrill as discussed previously in Note 2, with the balance of the proceeds, approximately $89,916,000, used for general corporate purposes.

On September 14, 1994, Chiles Offshore Corporation ("Chiles") merged with Noble Offshore Corporation ("NOC"), a wholly owned subsidiary of Noble Drilling (the "Chiles Merger"). In the Chiles Merger, 4,025,000 shares of $1.50 convertible preferred stock of Chiles were converted into and exchanged for an equivalent number of shares of $1.50 Convertible Preferred Stock of Noble Drilling ("$1.50 Preferred Stock") having substantially the same rights, privileges, preferences and voting power as the Chiles preferred stock. Holders of the $1.50 Preferred Stock received a cash dividend at an annual rate of $1.50 per share. In December 1996, 4,023,779 shares of $1.50 Preferred Stock were converted into 9,836,475 shares of Noble Drilling common stock. The remaining 1,221 shares of $1.50 Preferred Stock were redeemed at $26.05 per share, plus accrued dividends.

NOTE 8 -- STOCK-BASED COMPENSATION PLANS

The Company has several stock-based compensation plans, which are described below. The Company applies APB Opinion 25 and related Interpretations in accounting for its stock-based compensation plans. In 1995, SFAS No. 123, Accounting for Stock-Based Compensation ("SFAS 123") was issued which, if fully adopted by the Company, would change the methods the Company applies in recognizing the cost of its stock-based compensation plans. Adoption of the cost recognition provisions of SFAS 123 is optional and the Company has decided not to elect these provisions. However, pro forma disclosures as if the Company adopted the cost recognition provisions of SFAS 123 are required and are presented below.

NONQUALIFIED STOCK OPTIONS

1991 STOCK OPTION AND RESTRICTED STOCK PLAN

The Company's 1991 Stock Option and Restricted Stock Plan, as amended (the "1991 Plan"), provides for the granting of options to purchase the Company's common stock, with or without stock appreciation rights ("SAR's"), and the awarding of shares of restricted stock to selected employees. Options may be either incentive stock options (intended to qualify under Section 422 of the Internal Revenue Code of 1986, as amended) or

38

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

nonqualified stock options. The 1991 Plan provides that the exercise price of any nonqualified stock option may not be less than 50 percent of the fair market value of the common stock on the date of grant and the exercise price of any incentive stock option may not be less than the fair market value of the common stock on the date of grant. At December 31, 1997, 5,330,944 shares were available for grant under the 1991 Plan.

In 1997 and 1996, the Company granted only nonqualified stock options under the 1991 Plan. All such options have a term of 10 years and an exercise price equal to the fair market value of the common stock on the date of grant and vest at the rate of 33 1/3 percent on each anniversary of the date of grant, commencing on the first anniversary of the date of grant. The Company granted options on 1,787,000 shares in 1997, 1,358,600 shares in 1996 and 1,240,400 shares in 1995. In accordance with APB 25, the Company has not recognized any compensation cost for the options granted in 1997, 1996 and 1995 under the 1991 Plan.

OTHER PLANS AND AGREEMENTS

In 1987 the Company granted nonqualified stock options on 300,000 shares of common stock to certain non-employee directors of the Company pursuant to stock option agreements which were approved by stockholders. The exercise price of these options was the fair market value of the common stock on the date of grant. At December 31, 1997, all options to purchase shares under these agreements had been exercised or expired.

The Company's 1992 Nonqualified Stock Option Plan for Non-Employee Directors (the "1992 Plan") provides for the granting of nonqualified stock options to non-employee directors. Under the 1992 Plan, non-employee directors of the Company receive an annual grant of an option to purchase 3,500 shares of common stock. New non-employee directors receive a one-time grant of an option to purchase 10,000 shares of common stock immediately after the date of their first annual meeting of stockholders. The options are granted at fair market value on the grant date and are exercisable from time to time over a period commencing one year from the grant date and ending on the expiration of ten years from the grant date, unless terminated sooner as described in the 1992 Plan. Under the 1992 Plan, at December 31, 1997, options to purchase 140,000 shares were outstanding, of which 105,000 shares were exercisable. The Company granted options on 17,500 shares in 1997.

A summary of the status of the Company's stock options under the 1991 Plan as of December 31, 1997, 1996 and 1995 and the changes during the year ended on those dates is presented below (actual amounts):

                                             1997                          1996                            1995
                                  ------------------------       -----------------------         -----------------------
                                 NUMBER OF        WEIGHTED       NUMBER OF      WEIGHTED         NUMBER OF      WEIGHTED
                                  SHARES          AVERAGE         SHARES        AVERAGE           SHARES        AVERAGE
                                 UNDERLYING       EXERCISE       UNDERLYING     EXERCISE         UNDERLYING     EXERCISE
                                  OPTIONS          PRICE          OPTIONS        PRICE            OPTIONS        PRICE
                                 ----------       --------       ----------     --------         ----------     --------
Outstanding at beginning of
  the year.....................  3,484,903      $     7.11       2,799,747      $     5.38       1,810,472      $     5.45
Granted .......................  1,787,000           23.21       1,358,600            9.91       1,240,400            5.19
Exercised .....................   (858,213)           6.28        (515,281)           5.05        (109,150)           3.25
Forfeited .....................   (243,994)          11.97        (158,163)           7.36        (141,975)           6.30
                                 ---------      ----------       ---------      ----------       ---------      ----------
Outstanding at end of year ....  4,169,696      $    13.88       3,484,903      $     7.11       2,799,747      $     5.38
                                 =========      ==========       =========      ==========       =========      ==========

Exercisable at end of year ....  1,373,789      $     6.40       1,432,250      $     5.56       1,273,505      $     3.33
                                 =========      ==========       =========      ==========       =========      ==========

Weighted average fair value
  per share of the options
  granted during the year .....                 $    10.60                      $     4.36                      $     2.52
                                                ==========                      ==========                      ==========

The fair value of each stock option granted is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions for grants in 1997, 1996 and 1995, respectively:
dividend yield of 0.0 percent for both years; expected volatility of 41.27 percent for 1997, 40.85 percent for 1996 and 42.19 percent for 1995, respectively; different risk-free interest rates for each grant, ranging from 5.27 percent to 7.59 percent; and an expected life of the options of five years for all years.

39

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

The following table summarizes information about stock options outstanding at December 31, 1997 (actual amounts):

                                         OPTIONS OUTSTANDING                            OPTIONS EXERCISABLE
                         -----------------------------------------------------  -------------------------------------
                                              WEIGHTED
                             NUMBER            AVERAGE          WEIGHTED             NUMBER            WEIGHTED
  RANGE OF EXERCISE       OUTSTANDING         REMAINING          AVERAGE         EXERCISABLE AT         AVERAGE
        PRICES            AT 12/31/97       LIFE (YEARS)     EXERCISE PRICE         12/31/97        EXERCISE PRICE
------------------------ ----------------  ---------------- ------------------  -----------------  ------------------
$  1.72   to $  4.81          302,200            3.90       $      3.44              302,200       $       3.44
$  5.19   to $  7.69        1,131,119            6.44              6.00              805,722               6.33
$  9.81   to $ 14.00        1,024,127            8.09              9.94              265,867               9.96
$ 20.88   to $ 25.94        1,712,250            9.31             23.39                   --                 --
--------------------        ---------            ----       -----------            ---------       ------------

$  1.72   to $ 25.94        4,169,696            7.84       $     13.88            1,373,789       $       6.40
                            =========            ====       ===========            =========       ============

STOCK APPRECIATION RIGHTS

Effective as of July 25, 1996, a subsidiary of Noble Drilling granted stock appreciation rights covering 309,500 shares of Noble Drilling common stock. The stock appreciation rights, which are payable solely in cash, have a term of five years and an exercise price of fair market value on the date of grant and vested fully on July 25, 1997. There were 252,000 stock appreciation rights outstanding as of December 31, 1997, which had an intrinsic aggregate value of $4,158,000. In accordance with APB 25, the Company recognized compensation expense of approximately $3,500,000 and $776,000 for the years ended December 31, 1997 and 1996, respectively.

RESTRICTED STOCK

The Company has awarded restricted (i.e., nonvested) shares of Noble Drilling common stock pursuant to the 1991 Plan. A total of 58,863 shares of restricted common stock were awarded in July 1996 ("July 1996 Award") to selected employees. These shares will vest (subject only to future employment) 50 percent each year on a cumulative basis commencing one year from the date of award. In accordance with APB 25, the Company recognized compensation expense relating to the shares of the July 1996 Award in the amount of $468,000 and $161,000 for the years ended December 31, 1997 and 1996, respectively. The share price at date of grant for such 58,863 restricted shares was $14.13.

Additionally, in December 1994, January 1996 and January 1997, the Company awarded 185,500, 105,250 and 90,500 performance restricted shares, respectively. The share price at date of grant was $5.75, $8.88 and $21.00, respectively, for the December 1994, January 1996 and January 1997 awards. The vesting of these shares is dependent, among other things, on the achievement of certain specified corporate performance criteria. For the performance restricted shares awarded in 1994, the level of actual performance will be determined as of December 31, 1997 relative to the specified criteria, and the number of the performance restricted shares available for vesting will be determined under a schedule relating vesting to performance. The number of shares as so determined will then vest (subject only to future employment) at the rate of 33 1/3 percent thereof on March 31, 1998, March 31, 1999 and March 31, 2000. Nonvested shares will be forfeited. The vesting of the performance restricted shares awarded in 1996 and 1997 will be determined in a similar manner, substituting December 31, 1998 and 1999, respectively, as the performance evaluation dates and March 31, 1999 and 2000 as the first vesting dates. The number of shares available for vesting relating to the December 1994 award was 85,000 based on actual performance determined as of December 31, 1997. In accordance with APB 25, the Company recognized compensation expense of $3,068,000 for the year ended December 31, 1997 relating to all of the performance restricted share awards.

PRO FORMA NET INCOME AND NET INCOME PER COMMON SHARE

Pursuant to APB 25, the Company recognized charges of $7,036,000, $937,000 and $0 as compensation expense for equity-based compensation awarded in 1997, 1996 and 1995, respectively. Had the compensation cost

40

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

for the Company's stock-based compensation plans been determined consistent with SFAS 123, the Company would have recognized compensation expense of $13,374,000, $3,325,000 and $908,000 in 1997, 1996 and 1995, respectively. The Company's net income applicable to common shares and net income applicable to common shares per share for 1997 and 1996 would have approximated the pro forma amounts below (in millions except per share data):

                          As Reported      Pro Forma      As Reported      Pro Forma    As Reported     Pro Forma
                            12/31/97       12/31/97         12/31/96       12/31/96       12/31/95      12/31/95
                          -----------     -----------     -----------    -----------    -----------    -----------
Net Income Applicable
   to Common Shares ....  $   257,197     $   253,077     $    72,597    $    71,045    $    (5,605)   $    (6,195)
Net Income Applicable
   to Common Shares
   per Share-Diluted ...  $      1.93     $      1.90     $      0.66    $      0.65    $     (0.08)   $     (0.09)

The effects of applying SFAS 123 in this pro forma disclosure are not indicative of future amounts. SFAS 123 does not apply to awards prior to 1995, and the Company anticipates making awards in the future under its stock-based compensation plans.

STOCKHOLDER RIGHTS PLAN

The Company adopted a stockholder rights plan on June 28, 1995, designed to assure that the Company's stockholders receive fair and equal treatment in the event of any proposed takeover of the Company and to guard against partial tender offers and other abusive takeover tactics to gain control of the Company without paying all stockholders a fair price. The rights plan was not adopted in response to any specific takeover proposal. Under the rights plan, the Company declared a dividend of one right ("Right") on each share of Noble Drilling common stock. Each Right will entitle the holder to purchase one one-hundredth of a share of a new Series A Junior Participating Preferred Stock, par value $1.00 per share, at an exercise price of $120.00. The rights plan was amended on September 3, 1997 to increase the exercise price from $35.00 to $120.00. The Rights are not currently exercisable and will become exercisable only in the event a person or group acquires beneficial ownership of 15 percent or more of Noble Drilling common stock. The dividend distribution was made on July 10, 1995 to stockholders of record at the close of business on that date. The Rights will expire on July 10, 2005.

NOTE 9 -- INCOME TAXES

The Company follows SFAS No. 109, Accounting for Income Taxes, which requires the use of the liability method of accounting for deferred income taxes. Under SFAS No. 109, deferred tax assets and liabilities are recognized based upon differences between the financial statement and tax bases of assets and liabilities using presently enacted tax rates. If it is more likely than not that some portion or all of a deferred tax asset will not be realized, a valuation allowance is recognized.

Amounts of deferred tax assets and liabilities are as follows at:

DECEMBER 31,

                                                         1997          1996
                                                       --------      --------
[S]                                                    [C]           [C]
Deferred tax assets, net of valuation allowance of
  $0 in both 1997 and 1996 .........................   $  6,338      $ 41,544
Deferred tax liabilities ...........................    (64,231)      (50,616)
                                                       --------      --------
Net deferred tax liabilities .......................   $(57,893)     $ (9,072)
                                                       ========      ========

41

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

The components of and changes in the net deferred taxes were as follows:

                                                                        DEFERRED
                                                        DECEMBER 31,    (EXPENSE)   DECEMBER 31,
                                                            1997        CREDIT          1996
                                                        ------------    --------    ------------
Deferred tax assets:
  Domestic
    Net operating loss carryforwards .................... $     --      $(32,989)     $ 32,989
    Investment tax credit carryforward ..................       --          (699)          699
    Other ...............................................       --        (2,928)        2,928
    Book basis of assets in excess of tax basis .........       --        (2,241)        2,241
  International
    Net operating loss carryforwards ....................    4,580         3,208         1,372
    Tax basis of assets in excess of book basis .........    1,758           443         1,315
                                                          --------      --------      --------
Net deferred tax assets ................................. $  6,338      $(35,206)     $ 41,544
                                                          ========      ========      ========

Deferred tax liabilities:
  Domestic
    Excess of net book basis over remaining tax basis ... $(54,768)     $(11,834)     $(42,934)
    Other, net ..........................................   (1,951)          (89)       (1,862)
  International
    Excess of net book basis over remaining tax basis ...   (7,512)       (1,692)       (5,820)
                                                          --------      --------      --------
Deferred tax liabilities ................................ $(64,231)     $(13,615)     $(50,616)
                                                          ========      ========      ========

Income before income taxes and extraordinary items consisted of the following:

                                                                              YEAR ENDED DECEMBER 31,
                                                             ----------------------------------------------------------
                                                                   1997                1996                 1995
                                                             ------------------  ------------------   -----------------
Domestic.............................................        $     265,122       $      94,096        $      (9,578)
International........................................              114,491               7,863               14,444
                                                             -------------       -------------        -------------
Total................................................        $     379,613       $     101,959        $       4,866
                                                             =============       =============        =============

The income tax provision consisted of the following:

                                                                            YEAR ENDED DECEMBER 31,
                                                           -----------------------------------------------------------
                                                                 1997                 1996                 1995
                                                           -----------------    -----------------    -----------------
Current - domestic...................................      $      50,153        $       2,322        $      (2,093)
Current - international..............................             16,757               13,744                6,282
Deferred - domestic..................................             50,780                3,288                   --
Deferred - international.............................             (1,959)               3,308                 (917)
                                                           =============        =============        =============
Total ...............................................      $     115,731        $      22,662        $       3,272
                                                           =============        =============        =============

Included in the current domestic tax benefit for the year ended December 31, 1995, is $2,100,000 related to a separate return year loss carryback benefit recorded by Triton.

42

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

A reconciliation of Federal statutory and effective income tax rates is shown below:

                                                                         YEAR ENDED DECEMBER 31,
                                                                       --------------------------
                                                                       1997       1996       1995
                                                                       ----       ----       ----
Statutory rate ...................................................     35.0%      35.0%      35.0%
Effect of:
  U.S. operating loss generating no current tax benefit ..........       --         --       68.9
  U.S. operating loss carryforward/ carryback benefit ............       --       (29.1)     (43.1)
  Canadian operating loss carryforward benefit ...................       --       (0.7)        --
  International tax rates which are different than the U.S. rate .     (6.2)      14.7        6.4
  Other ..........................................................      1.7        2.3         --
                                                                       ----       ----       ----
Effective rate ...................................................     30.5%      22.2%      67.2%
                                                                       ====       ====       ====

The Company had available at December 31, 1996, unused investment tax credits of $669,000, which were used to offset 1997 U.S. taxes payable. In addition, Noble Drilling had net operating loss carryforwards ("NOL's") for tax purposes of approximately $94,253,000 at December 31, 1996, which were fully utilized in 1997.

Applicable U.S. income and foreign withholding taxes have not been provided on undistributed earnings of the Company's international subsidiaries. Management does not intend to repatriate such undistributed earnings for the foreseeable future except for distributions upon which incremental income taxes would not be material. At December 31, 1997, it was not practicable to estimate the deferred tax liability associated with the undistributed earnings of the Company's international subsidiaries.

NOTE 10 -- EMPLOYEE BENEFIT PLANS

The Company has a noncontributory defined benefit plan which covers substantially all salaried employees and a noncontributory defined benefit pension plan which covers certain field employees. The benefits from these plans are based primarily on years of service and employees' compensation near retirement. The Company's funding policy is consistent with funding requirements of applicable laws and regulations. The assets of these plans consist of corporate equity securities, municipal and government bonds, and cash equivalents. The Company, when required, makes contributions to the domestic plan in the form of Noble Drilling common stock. As of September 30, 1997, the domestic plan assets included $20,599,000 of Noble Drilling's common stock valued at fair value at that date. The Company changed the measurement date of the plan to September 30 beginning in 1995. This change did not have a material impact to the financial results of the Company.

Each of Noble Drilling (U.K.) Limited, Nedstaff Europe Ltd. and Noble Drilling (Nederland) B.V., wholly owned subsidiaries of Noble Drilling, maintains pension plans which cover all of its salaried, nonunion employees. Benefits are based on credited service and the average of the highest three years of qualified salary within the past ten years of participation.

43

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

Pension cost includes the following components:

                                                             YEAR ENDED DECEMBER 31,
                             --------------------------------------------------------------------------------
                                        1997                        1996                        1995
                             ------------------------    ------------------------    ------------------------
                             INTERNATIONAL   DOMESTIC    INTERNATIONAL   DOMESTIC    INTERNATIONAL   DOMESTIC
                             -------------   --------    -------------   --------    -------------   --------
Service costs (benefits
  earned during the year) ...  $  2,881      $  1,520      $    523      $  1,589      $    581      $  1,201
Interest cost on projected
  benefit obligation ........     1,087         2,094           726         2,023           702         1,890
Actual return on assets .....    (1,291)      (11,690)         (928)       (4,500)         (870)       (2,439)
Amortization of net loss
  (gain) at January 1 .......       158         8,971           (55)        2,607           (44)          757
                               --------      --------      --------      --------      --------      --------
Net pension expense .........  $  2,835      $    895      $    266      $  1,719      $    369      $  1,409
                               ========      ========      ========      ========      ========      ========

The funded status of the plans is as follows:

                                                                       DECEMBER 31,
                                                   ----------------------------------------------------
                                                              1997                      1996
                                                   ------------------------    ------------------------
                                                   INTERNATIONAL   DOMESTIC    INTERNATIONAL   DOMESTIC
                                                   -------------   --------    -------------   --------
Actuarial present value of benefit obligations
  Vested benefits .................................  $(14,002)     $(23,850)     $ (8,756)     $(21,869)
  Nonvested benefits ..............................    (2,799)       (1,524)           --          (988)
                                                     --------      --------      --------      --------
  Accumulated benefits ............................   (16,801)      (25,374)       (8,756)      (22,857)
  Effect of projected future compensation levels ..    (3,175)       (5,636)       (1,389)       (4,269)
                                                     --------      --------      --------      --------
Projected benefits ................................   (19,976)      (31,010)      (10,145)      (27,126)
Plan assets at fair value .........................    18,401        38,382        11,880        27,856
                                                     --------      --------      --------      --------
Plan assets in (shortfall) excess of
  projected benefit obligations ...................    (1,575)        7,372         1,735           730
Unrecognized net (loss) gain ......................    (2,401)       (3,051)       (2,169)        5,431
Unrecognized prior service cost ...................        --           801            --           (59)
Unrecognized transition obligation (asset) ........     3,184          (597)           95        (1,053)
Additional liability ..............................    (1,389)         (588)           --            --
                                                     ========      ========      ========      ========
(Accrued liability) prepaid asset .................  $ (2,181)     $  3,937      $   (339)     $  5,049
                                                     ========      ========      ========      ========

The projected benefit obligations for the international and domestic plans were determined using an assumed discount rate of 6.75 percent and 7.25 percent, respectively, in 1997, 8.25 percent and 7.5 percent, respectively, in 1996 and 8.5 percent and 7.5 percent, respectively, in 1995. Assumed long-term rate of return on international plan assets was 7.5 percent, 9.0 percent and 9.25 percent for 1997, 1996 and 1995, respectively. Assumed long-term rate of return on domestic plan assets was 9.0 percent in each of the years presented. The projected benefit obligations for the international plan assume a compensation increase of 4.5 percent, 6.0 percent and 6.25 percent for 1997, 1996 and 1995, respectively, and 6.0 percent per annum for the domestic plan in each of the years presented.

The Company presently sponsors medical and other plans for the benefit of its employees. The cost of maintaining these plans aggregated $11,868,000, $8,912,000 and $6,628,000 in 1997, 1996 and 1995, respectively.

The Company does not provide post-retirement benefits (other than pensions) or any post-employment benefits to its employees.

44

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

NOTE 11 -- COMMITMENTS, CONTINGENCIES AND OBLIGATIONS

On October 25, 1993, the Company purchased two submersible offshore drilling rigs from Portal Rig Corporation ("Portal") for 626,410 shares of Noble Drilling common stock. The Company acquired the rigs subject to certain federal income tax "safe harbor leases" and a related preferred ship mortgage relating to a tax benefit transaction entered into in 1982 by a predecessor of Portal. Portal has agreed to indemnify the Company for any potential liabilities as a result of this earlier tax benefit transaction.

The Company is a defendant in certain claims and litigation arising out of operations in the normal course of business. In the opinion of management, uninsured losses, if any, will not be material to the Company's financial position or results of operations.

The Company has entered into contracts for three EVA-4000(TM) semisubmersible rigs, the Noble Paul Romano, Noble Paul Wolff and Noble Amos Runner, and the Company has commitments for two additional EVA-4000(TM) rigs, the Noble Jim Thompson and Noble Max Smith. The Company has also entered into a letter of intent with two operators to utilize the Noble Homer Ferrington (formerly the Shelf 4) in the Gulf of Mexico. The Company will be required to make significant capital expenditures to refurbish and upgrade the rig. The total cost of these six projects is expected to be approximately $800,000,000. Further, the Company is marketing additional rigs for conversion into deepwater design semisubmersible units. Because any such conversion would require substantial capital expenditures, such projects will not be completed except in connection with entering into a long-term drilling contract with an operator. However, given the strong demand for drilling rigs and related services, increasingly heavy backlogs for equipment and services required to complete the conversions could constrain the Company's ability to complete the conversions on a timely basis. The Company has entered into agreements with several vendors to purchase equipment or for the construction of equipment for the conversion of rigs, which agreements generally require non-refundable payments as certain milestones are met. The amount of such payments totaled $76,600,000 as of December 31, 1997. As of December 31, 1997, the Company also had purchase commitments of $27,700,000, which are subject to negotiation upon cancellation. These expenditures will be funded from operating cash flows, existing cash balances, available lines of credit and possibly from other sources of project financing. The Company is currently reviewing several proposals from financial institutions to provide project financing for the EVA-4000(TM) semisubmersible conversions.

At December 31, 1997, the Company had certain noncancellable long-term operating leases, principally for office space and facilities, with various expiration dates. Future minimum rentals under such leases aggregate $6,640,000 for 1998, $5,952,000 for 1999, $5,468,000 for 2000, $4,998,000 for 2001, and $26,876,000 thereafter.

45

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

NOTE 12 -- UNAUDITED INTERIM FINANCIAL DATA

Unaudited interim financial information for the years ended December 31, 1997 and 1996 is as follows:

                                                                                  QUARTER ENDED
                                                       -----------------------------------------------------
                                                        MAR. 31        JUNE 30       SEPT. 30       DEC. 31
                                                       ---------      ---------      ---------     ---------
1997
Operating revenues ..................................  $ 168,715      $ 184,992      $ 171,636     $ 187,852
Operating income (1)(2) .............................  $  35,062      $ 242,877      $  43,647     $  59,761
Income before extraordinary charge ..................  $  23,648      $ 161,700      $  33,481     $  45,053
Extraordinary charge, net of tax (3) ................  $  (1,704)     $  (4,981)     $      --     $      --
Net income (5)(6) ...................................  $  21,944      $ 156,719      $  33,481     $  45,053
Net income per share-basic (1)(2)(3)(4)(5)(6)(7) ....  $    0.17      $    1.18      $    0.25     $    0.34
Net income per share-diluted (1)(2)(3)(4)(5)(6)(7) ..  $    0.16      $    1.17      $    0.25     $    0.34

                                                               QUARTER ENDED
                                           ------------------------------------------------------
                                            MAR. 31        JUNE 30       SEPT. 30        DEC. 31
                                           ---------      ---------      ---------      ---------
1996
Operating revenues ....................... $ 104,757      $ 109,686      $ 158,072      $ 141,738
Operating income (8)(9) .................. $  14,097      $  20,413      $  30,549      $  47,492
Income before extraordinary charge ....... $  10,726      $  16,253      $  25,221      $  27,097
Extraordinary charge, net of tax (10) ....        --             --             --      $    (660)
Net income (11) .......................... $  10,726      $  16,253      $  25,221      $  26,437
Preferred stock dividends ................ $  (1,511)     $  (1,509)     $  (1,509)     $  (1,511)
Net income applicable to common shares ... $   9,215      $  14,744      $  23,712      $  24,926
Net income applicable to common shares
   per share-basic (7)(8)(9)(10)(11) ..... $    0.10      $    0.16      $    0.19      $    0.20
Net income applicable to common shares
   per share-diluted (7)(8)(9)(10)(11) ... $    0.10      $    0.15      $    0.19      $    0.20


(1) Included in the quarter ended June 30, 1997 were non-recurring items consisting of $197,676,000 ($1.48 per share) of gain relating to the sale of the Company's 12 mat supported jackup rigs (plus the hull of one additional mat supported unit).
(2) Included in the quarter ended December 31, 1997, was a non-recurring charge of $2,313,000 ($0.02 per share) related to the disposition of certain non-core assets.
(3) Included in the quarter ended December 31, 1997, is an extraordinary charge of $1,704,000 (0.01 per share) related to the Company's purchase of $29,555,000 principal amount of it 9 1/4% Senior Notes. (4) Included in the quarter ended June 30, 1997, is an extraordinary charge of $4,981,000 ($0.04 per share) related to the Company's purchase of $81,330,000 principal amount of its 9 1/4% Senior Notes.
(5) Included in the quarter ended June 30, 1997 were taxes of $69,187,000 ($0.52 per share) related to the gain on the sale of mat rigs.
(6) Included in the quarter ended December 31, 1997, was a tax benefit of $810,000 ($0.01 per share) related to the disposition of non-core assets.
(7) The Company has adopted SFAS No. 128, Earnings Per Share ("SFAS 128"). All prior period earnings per share data have been restated to conform to the provisions of SFAS 128.
(8) Included in the quarter ended March 31, 1996, were non-recurring items consisting of $7,600,000 ($0.08 per share) of impairment charges and $7,527,000 ($0.08 per share) of gains on sales of posted barge rigs.
(9) Included in the quarter ended December 31, 1996, were non-recurring items consisting of $45,414,000 ($0.36 per share) of gain on the sale of the land drilling assets partially offset by $10,200,000 ($0.08 per share) of impairment charges, excluding a reduction of $289,000 relating to minority interest, $14,808,000 ($0.12 per share) of inventory charges and $3,350,000 ($0.03 per share) of adjustments to depreciation.
(10) Included in the quarter ended December 31, 1996, is an extraordinary charge of $660,000 ($0.01 per share) related to the Company's purchase of $11,000,000 principal amount of its 9 1/4% Senior Notes.
(11) Included in the quarter ended December 31, 1996, were taxes of $16,259,000 ($0.13 per share) related to the gain on the sale of the land drilling assets.

46

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

NOTE 13 - GEOGRAPHICAL INFORMATION

                             YEAR ENDED DECEMBER 31,
                        ----------------------------------
                          1997         1996         1995
                        --------     --------     --------
Operating revenues
  Domestic ...........  $254,213     $262,041     $165,391
  International
    Argentina ........        --        4,617           --
    Brazil ...........    33,312        8,722           --
    Canada ...........     8,153       10,107       13,929
    Congo ............        --        2,353           --
    Denmark ..........    23,513       11,414           --
    India ............    14,413        5,443        3,771
    Mexico ...........    44,373        9,807        9,398
    Nigeria ..........    82,067       57,158       45,860
    Qatar ............    34,951       15,825        2,452
    The Netherlands ..    57,179       29,350           --
    United Kingdom ...    71,120       52,297       37,891
    Venezuela ........    77,427       36,427       40,223
    Zaire ............    12,474        8,692        8,860
    Other ............        --           --          193
                        --------     --------     --------
       Total .........  $713,195     $514,253     $327,968
                        ========     ========     ========

                                     YEAR ENDED DECEMBER 31,
                            --------------------------------------
                               1997          1996           1995
                            ---------     ---------      ---------
Operating income (loss)
  Domestic ............     $ 253,873     $  90,413      $  (5,239)
  International
    Argentina .........            --        (1,755)            --
    Brazil ............         4,168        (1,183)            --
    Canada ............         2,190         9,899          2,521
    Congo .............            --          (835)            --
    Denmark ...........         1,469         1,831             --
    India .............         6,674           882            283
    Mexico ............        24,286         1,894             94
    Nigeria ...........        25,068        (6,703)         3,597
    Qatar .............         7,112        (6,756)        (2,455)
    The Netherlands ...        22,117         8,313             --
    United Kingdom ....        17,320        12,132          4,766
    Venezuela .........        13,074         5,819          7,178
    Zaire .............         3,996            68          2,139
    Other .............            --        (1,468)          (606)
                            ---------     ---------      ---------
       Total ..........     $ 381,347     $ 112,551      $  12,278
                            =========     =========      =========

47

NOBLE DRILLING CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS --(CONTINUED)

(Unless otherwise indicated, dollar amounts in tables are in thousands, except per share amounts)

DECEMBER 31,

                           1997           1996           1995
                        ----------     ----------     ----------
[S]                     [C]            [C]            [C]
Identifiable assets
  Domestic ...........  $  519,079     $  515,576     $  313,237
  International
    Argentina ........          --         48,936             --
    Brazil ...........     146,613         57,833             --
    Canada ...........      12,489          8,077         13,206
    Congo ............          --         40,038             --
    Denmark ..........      81,543         43,375             --
    India ............      85,037         81,749         21,104
    Mexico ...........      78,849         30,817         32,328
    Nigeria ..........     103,217        110,357        179,934
    Qatar ............      80,780         85,358         37,506
    The Netherlands ..     198,298        153,479             --
    United Kingdom ...      70,613         70,565         15,051
    Venezuela ........      93,337         85,988         84,042
    Zaire ............      22,542         25,571         25,023
    Other ............      13,414          9,454         21,099
                        ----------     ----------     ----------
      Total ..........  $1,505,811     $1,367,173     $  742,530
                        ==========     ==========     ==========

48

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
FINANCIAL DISCLOSURE

Not applicable.

PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

The sections entitled "Election of Directors" and "Section 16(a) Beneficial Ownership Reporting Compliance" appearing in Noble Drilling's proxy statement for the annual meeting of stockholders to be held on April 23, 1998 (the "1998 Proxy Statement"), set forth certain information with respect to the directors of Noble Drilling and with respect to reporting under Section 16(a) of the Securities Exchange Act of 1934, and are incorporated herein by reference.

Certain information with respect to the executive officers of Noble Drilling is set forth under the caption "Executive Officers of the Registrant" in Part I of this report.

ITEM 11. EXECUTIVE COMPENSATION

The section entitled "Executive Compensation" appearing in the 1998 Proxy Statement sets forth certain information with respect to the compensation of management of Noble Drilling, and, except for the report of the compensation committee of the board of directors of Noble Drilling on executive compensation and the information therein under "Performance Graph," is incorporated herein by reference.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

The sections entitled "Security Ownership of Certain Beneficial Owners" and "Security Ownership of Management" appearing in the 1998 Proxy Statement set forth certain information with respect to the ownership of voting securities and equity securities of Noble Drilling, and are incorporated herein by reference.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Not applicable.

49

PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K

(a) The following documents are filed as part of this report:

(1) A list of the financial statements filed as a part of this report is set forth in Item 8 on page 23 and is incorporated herein by reference.

(2) Financial Statement Schedules:

All schedules are omitted because they are either not applicable or the required information is shown in the financial statements or notes thereto.

(3) Exhibits:

The information required by this Item 14(a)(3) is set forth in the Index to Exhibits accompanying this Annual Report on Form 10-K and is incorporated herein by reference.

(4) Financial Statements required by Form 11-K for the fiscal year ended December 31, 1997, with respect to the Noble Drilling Corporation Thrift Plan (to be filed by amendment).

(b) No reports on Form 8-K were filed by the Company during the quarter ended December 31, 1997.

50

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

NOBLE DRILLING CORPORATION

Date: March 19, 1998
By: JAMES C. DAY
James C. Day, Chairman, President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following individuals on behalf of the Registrant and in the capacities and on the dates indicated.

            SIGNATURE                               CAPACITY IN WHICH SIGNED                         DATE
-----------------------------------     --------------------------------------------------    --------------------
JAMES C. DAY                            Chairman, President and Chief
-----------------------------------     Executive Officer and Director                        March 19, 1998
James C. Day

BYRON L. WELLIVER                       Senior Vice President - Finance,
-----------------------------------     Treasurer and Controller                              March 19, 1998
Byron L. Welliver                       (Principal Financial and Accounting Officer)


MICHAEL A. CAWLEY                       Director                                              March 19, 1998
-----------------------------------
Michael A. Cawley

LAWRENCE J. CHAZEN                      Director                                              March 19, 1998
-----------------------------------
Lawrence J. Chazen

TOMMY C. CRAIGHEAD                      Director                                              March 19, 1998
-----------------------------------
Tommy C. Craighead

WILLIAM J. DORE                         Director                                              March 19, 1998
-----------------------------------
William J. Dore

JAMES L. FISHEL                         Director                                              March 19, 1998
-----------------------------------
James L. Fishel

MARC E. LELAND                          Director                                              March 19, 1998
-----------------------------------
Marc E. Leland

WILLIAM A. SEARS                        Director                                              March 19, 1998
-----------------------------------
William A. Sears

51

INDEX TO EXHIBITS

   EXHIBIT
   NUMBER                                    EXHIBIT
--------------       -----------------------------------------------------------
 2.1           -     Agreement of Sale and Purchase dated as of April 25, 1996
                     between the Registrant and Royal Nedlloyd N.V. and Neddrill
                     Holding B.V. (filed as Exhibit 2.1 to the Registrant's
                     Registration Statement on Form S-3 (No. 333-2927) and
                     incorporated herein by reference).


 2.2           -     Asset Purchase Agreement dated November 15, 1996 by and
                     between the Registrant, Noble Properties, Inc. and Noble
                     Drilling (Canada) Ltd. and Nabors Industries, Inc. (filed
                     as Exhibit 2.1 to the Registrant's Form 8-K dated December
                     27, 1996 (date of event: December 13, 1996) and
                     incorporated herein by reference).


 2.3           -     Agreement dated December 13, 1996 by and among the
                     Registrant, Noble Properties, Inc., Noble Drilling (Canada)
                     Ltd., Noble Drilling (U.S.) Inc., and Noble Drilling Land
                     Limited and Nabors Industries, Inc., Nabors Drilling USA,
                     Inc. and Nabors Drilling Limited (filed as Exhibit 2.2 to
                     the Registrant's Form 8-K dated December 27, 1996 (date of
                     event: December 13, 1996) and incorporated herein by
                     reference).


 2.4           -     Asset Purchase Agreement dated as of February 19, 1997
                     between the Registrant, Noble Drilling (U.S.) Inc., Noble
                     Offshore Corporation, Noble Drilling (Mexico) Inc. and NN-1
                     Limited Partnership and Pride Petroleum Services, Inc.
                     (filed as Exhibit 2.10 in the Registrant's Annual Report on
                     Form 10-K for the year ended December 31, 1996 and
                     incorporated herein by reference.)


 2.5           -     Agreement dated April 10, 1997 by and between Noble
                     Drilling Corporation, Noble Drilling (U.S.) Inc., Noble
                     Offshore Corporation, Noble Drilling (Mexico) Inc. and NN-1
                     Limited Partnership, and Pride Petroleum Services, Inc.
                     (filed as Exhibit 2.2 to the Registrant's Form 8-K dated
                     May 21, 1997 (date of event: May 7, 1997) and incorporated
                     herein by reference).


 2.6           -     First Amendment to Asset Purchase Agreement dated as of May
                     7, 1997 by and between Noble Drilling Corporation, Noble
                     Drilling (U.S.) Inc., Noble Offshore Corporation, Noble
                     Drilling (Mexico) Inc., NN-1 Limited Partnership and Mexico
                     Drilling Partners Inc., and Pride Petroleum Services, Inc.,
                     Pride Offshore, Inc. and Forasol S.A. (filed as Exhibit 2.3
                     to the Registrant's Form 8-K dated May 21, 1997 (date of
                     event: May 7, 1997) and incorporated herein by reference).


 3.1           -     Restated Certificate of Incorporation of the Registrant
                     dated August 29, 1985 (filed as Exhibit 3.7 to the
                     Registrant's Registration Statement on Form 10 (No.
                     0-13857) and incorporated herein by reference).


 3.2           -     Certificate of Amendment of Restated Certificate of
                     Incorporation of the Registrant dated May 5, 1987 (filed as
                     Exhibit 4.2 to the Registrant's Registration Statement on
                     Form S-3 (No. 33-67130) and incorporated herein by
                     reference).

52

   EXHIBIT
   NUMBER                                    EXHIBIT
--------------       -----------------------------------------------------------
 3.3           -     Certificate of Amendment of Certificate of Incorporation of
                     the Registrant dated July 31, 1991 (filed as Exhibit 3.16
                     to the Registrant's Annual Report on Form 10-K for the year
                     ended December 31, 1991 and incorporated herein by
                     reference).


 3.4           -     Certificate of Amendment of Certificate of Incorporation of
                     the Registrant dated September 15, 1994 (filed as Exhibit
                     3.1 to the Registrant's Quarterly Report on Form 10-Q for
                     the three-month period ended March 31, 1995 and
                     incorporated herein by reference).


 3.5           -     Certificate of Designations of Series A Junior
                     Participating Preferred Stock, par value $1.00 per share,
                     of the Registrant dated as of June 29, 1995 (filed as
                     Exhibit 3.2 to the Registrant's Quarterly Report on Form
                     10-Q for the three-month period ended June 30, 1995 and
                     incorporated herein by reference).


 3.6           -     Certificate of Amendment of Certificate of Designations of
                     Series A Junior Participating Preferred Stock of Registrant
                     dated September 5, 1997.


 3.7           -     Composite copy of the Bylaws of the Registrant as currently
                     in effect.


 3.8           -     Amendment of Articles IV and VI of the Bylaws of the
                     Registrant adopted January 29, 1998.


 4.1           -     Indenture dated as of October 1, 1993 governing the 9 1/4%
                     Senior Notes due 2003 (filed as Exhibit 4.1 to the
                     Registrant's Quarterly Report on Form 10-Q for the
                     three-month period ended September 30, 1993 and
                     incorporated herein by reference).


 4.2           -     First Supplemental Indenture dated as of May 30, 1997 to
                     Indenture dated as of October 1, 1993 governing the 9 1/4%
                     Senior Notes due 2003.


 4.3           -     Indenture dated as of July 1, 1996 governing the 9-1/8%
                     Senior Notes due 2006 (including form of Note) (filed as
                     Exhibit 4.1 to the Registrant's Form 8-K dated July 16,
                     1996 (date of event: July 1, 1996) and incorporated herein
                     by reference).


 4.4           -     Credit Agreement, dated as of August 14, 1997, among Noble
                     Drilling Corporation, the lending institutions listed from
                     time to time on Annex I thereto, Credit Lyonnais New York
                     Branch, as Documentation Agent and Christiania Bank Og
                     Kreditkasse ASA, New York Branch, as Arranger and
                     Administrative Agent.


 4.5           -     Rights Agreement dated as of June 28, 1995 between the
                     Registrant and Liberty Bank and Trust Company of Oklahoma
                     City, N.A. (filed as Exhibit 4 to the Registrant's Form 8-K
                     dated June 29, 1995 (date of event: June 28, 1995) and
                     incorporated herein by reference).

53

   EXHIBIT
   NUMBER                                    EXHIBIT
--------------       -----------------------------------------------------------
 4.6           -     Amendment No. 1 to Rights Agreement, dated September 3,
                     1997, between Noble Drilling Corporation and Liberty Bank
                     and Trust Company of Oklahoma City, N.A. (filed as Exhibit
                     4.2 to the Registrant's Form 8-A/A (Amendment No. 1) dated
                     September 3, 1997 and incorporated herein by reference).


 4.7           -     Summary of Rights to Purchase Preferred Shares, as amended
                     as of September 3, 1997 to conform with Amendment No. 1 to
                     Rights Agreement, dated September 3, 1997 (filed as Exhibit
                     4.3 to the Registrant's Form 8-K dated September 3, 1997
                     (date of event: September 3, 1997) and incorporated herein
                     by reference).


10.1           -     Assets Purchase Agreement dated as of August 20, 1993 (the
                     "Portal Assets Purchase Agreement"), between the Registrant
                     and Portal Rig Corporation (filed as Exhibit 2.3 to the
                     Registrant's Registration Statement on Form S-3 (No.
                     33-67130) and incorporated herein by reference).


10.2           -     Agreement dated as of October 25, 1993, among the
                     Registrant, Noble (Gulf of Mexico) Inc. and Portal Rig
                     Corporation, amending the Portal Assets Purchase Agreement
                     (filed as Exhibit 2.5 to the Registrant's Quarterly Report
                     on Form 10-Q for the three-month period ended September 30,
                     1993 and incorporated herein by reference).


10.3           -     Amended and Restated Letter of Credit Agreement, dated as
                     of October 25, 1993, among Portal Rig Corporation, Noble
                     (Gulf of Mexico) Inc., NationsBank of Texas, N.A., as agent
                     and as one of the "Banks" thereunder, and Marine Midland
                     Bank, N.A., Bank of America National Trust and Savings
                     Association, and Norwest Bank Minnesota, National
                     Association (collectively, the "Banks") (filed as Exhibit
                     10.1 to the Registrant's Quarterly Report on Form 10-Q for
                     the three-month period ended September 30, 1993 and
                     incorporated herein by reference).


10.4           -     Assignment, Assumption and Amended and Restated Preferred
                     Ship Mortgage, dated October 25, 1993, by Noble (Gulf of
                     Mexico) Inc. to the Banks (filed as Exhibit 10.2 to the
                     Registrant's Quarterly Report on Form 10-Q for the
                     three-month period ended September 30, 1993 and
                     incorporated herein by reference).


10.5           -     Security Agreement and Assignment, dated October 25, 1993,
                     by Noble (Gulf of Mexico) Inc. to the Banks (filed as
                     Exhibit 10.3 to the Registrant's Quarterly Report on Form
                     10-Q for the three-month period ended September 30, 1993
                     and incorporated herein by reference).


10.6           -     Noble Support Agreement, dated October 25, 1993, among the
                     Registrant and the Banks (filed as Exhibit 10.4 to the
                     Registrant's Quarterly Report on Form 10-Q for the
                     three-month period ended September 30, 1993 and
                     incorporated herein by reference).


10.7           -     Stock Purchase Agreement dated April 22, 1994 among Joseph
                     E. Beall, George H. Bruce, Triton Engineering Services
                     Company and the Registrant (filed as Exhibit 2.1 to the
                     Registrant's Form 8-K dated May 6, 1994 (date of event:
                     April 22, 1994) and incorporated herein by reference).

54

   EXHIBIT
   NUMBER                                    EXHIBIT
--------------       -----------------------------------------------------------
10.8           -     Employment Agreement dated April 22, 1994 between Triton
                     Engineering Services Company and Joseph E. Beall (filed as
                     Exhibit 10.2 to the Registrant's Form 8-K dated May 6, 1994
                     (date of event: April 22, 1994) and incorporated herein by
                     reference).


10.9*          -     Noble Drilling Corporation 1987 Stock Option Plan (filed as
                     Exhibit 10.7 to the Registrant's Annual Report on Form 10-K
                     for the year ended December 31, 1986, as amended, and
                     incorporated herein by reference).


10.10*         -     Noble Drilling Corporation 1991 Stock Option and Restricted
                     Stock Plan (as amended and restated on January 30, 1997
                     (filed as Exhibit 10.2 to the Registrant's Annual Report on
                     Form 10-K for the year ended December 31, 1996 and
                     incorporated herein by reference).


10.11*         -     Noble Drilling Corporation 1992 Nonqualified Stock Option
                     Plan for Non-Employee Directors (filed as Exhibit 4.1 to
                     the Registrant's Registration Statement on Form S-8 (No.
                     33-62394) and incorporated herein by reference).


10.12*         -     Amendment No. 1 to the Noble Drilling Corporation 1992
                     Nonqualified Stock Option Plan for Non-Employee Directors
                     dated as of July 28, 1994 (filed as Exhibit 10.44 to the
                     Registrant's Annual Report on Form 10-K for the year ended
                     December 31, 1994 and incorporated herein by reference).


10.13*         -     Noble Drilling Corporation Equity Compensation Plan for
                     Non-Employee Directors (filed as Exhibit 10.1 to the
                     Registrant's Quarterly Report on Form 10-Q for the
                     three-month period ended September 30, 1996 and
                     incorporated herein by reference).


10.14*         -     Noble Drilling Corporation Short-Term Incentive Plan
                     (revised July 1997).


10.15*         -     Noble Drilling Corporation Amended and Restated Thrift
                     Restoration Plan (filed as Exhibit 10.46 to the
                     Registrant's Annual Report on Form 10-K for the year ended
                     December 31, 1994 and incorporated herein by reference).


10.16*         -     Amendment No. 1 to the Noble Drilling Corporation Amended
                     and Restated Thrift Restoration Plan dated January 29,
                     1998.


10.17*         -     Noble Drilling Corporation Retirement Restoration Plan
                     dated April 27, 1995 (filed as Exhibit 10.2 to the
                     Registrant's Quarterly Report on Form 10-Q for the
                     three-month period ended March 31, 1995 and incorporated
                     herein by reference).


10.18*         -     Amendment No. 1 to the Noble Drilling Corporation
                     Retirement Restoration Plan dated January 29, 1998.

55

   EXHIBIT
   NUMBER                                    EXHIBIT
--------------       -----------------------------------------------------------
10.19*         -     Form of Indemnity Agreement entered into between the
                     Registrant and each of the Registrant's directors and bylaw
                     officers (filed as Exhibit 10.46 to the Registrant's Annual
                     Report on Form 10-K for the year ended December 31, 1995
                     and incorporated herein by reference).


10.20          -     Guarantee dated August 26, 1994 between the Registrant and
                     Hibernia Management and Development Company Ltd. (filed as
                     Exhibit 10.45 to the Registrant's Annual Report on Form
                     10-K for the year ended December 31, 1994 and incorporated
                     herein by reference).


10.21          -     Registration Rights Agreement dated as of July 1, 1996
                     between the Registrant and Royal Nedlloyd N.V. (filed as
                     Exhibit 10.25 to the Registrant's Annual Report on Form
                     10-K for the year ended December 31, 1996 and incorporated
                     herein by reference).


21.1           -     Subsidiaries of the Registrant.


23.1           -     Consent of Price Waterhouse LLP.


27.1           -     Financial Data Schedule.


* Management contract or compensatory plan or arrangement required to be filed as an exhibit hereto.

56

EXHIBIT 3.6

STATE OF DELAWARE

OFFICE OF THE SECRETARY OF STATE


I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF DESIGNATION OF "NOBLE DRILLING CORPORATION", FILED IN THIS OFFICE ON THE FIFTH DAY OF SEPTEMBER, A.D. 1997, AT 10 O'CLOCK A.M.

A CERTIFIED COPY OF THIS CERTIFICATE HAS BEEN FORWARDED TO THE NEW

CASTLE COUNTY RECORDER OF DEEDS FOR RECORDING.

[SEAL]  /s/ EDWARD J. FREEL
        -----------------------------------------
        Edward J. Freel, Secretary of State

        AUTHENTICATION:   8637469

                  DATE:   09-05-97


CERTIFICATE OF AMENDMENT

OF

CERTIFICATE OF DESIGNATIONS

OF

SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

OF

NOBLE DRILLING CORPORATION


PURSUANT TO SECTION 151 OF THE
GENERAL CORPORATION LAW OF THE STATE OF DELAWARE


NOBLE DRILLING CORPORATION, a corporation organized and existing under and by virtue of the General Corporation Law of the State of Delaware (the "Corporation"),

DOES HEREBY CERTIFY:

FIRST: That, pursuant to the authority conferred on the Board of Directors of the Corporation by the Restated Certificate of Incorporation, as amended, of the Corporation (the "Certificate of Incorporation") and in accordance with Section 151 of the General Corporation Law of the State of Delaware, the Certificate of Designations ("Certificate of Designations") establishing and creating a series of Preferred Stock, par value $1.00 per share, of the Corporation designated as Series A Junior Participating Preferred Stock became effective on June 29, 1995.

SECOND: That, pursuant to the authority conferred on the Board of Directors of the Corporation by the Certificate of Incorporation and in accordance with Section 151 of the General Corporation Law of the State of Delaware, at a meeting of the Board of Directors of the Corporation, a resolution was duly adopted authorizing and directing an amendment of the Certificate of Designations to increase the number of shares of Series A Junior Participating Preferred Stock of the Corporation. The resolution setting forth the amendment is as follows:

RESOLVED, that the Certificate of Designations of Series A Junior Participating Preferred Stock of the Corporation be amended by changing Section 1 thereof so that, as amended, said Section shall be and read as follows:


SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

"Section 1. Designation and Amount. The shares of such series shall be designated as "Series A Junior Participating Preferred Stock" (the "Series A Preferred Stock"). The number of shares constituting the Series A Preferred Stock shall be 1,500,000; provided, however, that if more than a total of 1,500,000 shares of Series A Preferred Stock shall be issuable upon the exercise of Rights (the "Right") issued pursuant to the Rights Agreement dated as of June 28, 1995 between the Corporation and Liberty Bank and Trust Company of Oklahoma City, N.A., as Rights Agent (as the same may be amended from time to time in accordance with its terms, the "Rights Agreement"), the Board of Directors of the Corporation, pursuant to Section 151(g) of the General Corporation Law of the State of Delaware, shall direct by resolution or resolutions that a certificate be properly executed, acknowledged, filed and recorded, in accordance with the provisions of Section 103 thereof, providing for the total number of shares of Series A Preferred Stock authorized to be issued to be increased (to the extent that the Certificate of Incorporation then permits) to the largest number of whole shares (rounded up to the nearest whole share) issuable upon exercise of such Rights."

IN WITNESS WHEREOF, the Corporation has caused this Certificate of Amendment of Certificate of Designations to be duly executed in its corporate name on this 3rd day of September, 1997.

NOBLE DRILLING CORPORATION

By   /s/ JAMES C. DAY
     ----------------------------------
     James C. Day
     Chairman, President and
       Chief Executive Officer

2

EXHIBIT 3.7

BYLAWS

OF

NOBLE DRILLING CORPORATION

ARTICLE I

OFFICES

Section 1. Registered Office. The registered office of Noble Drilling Corporation (hereinafter called the "Corporation") in the State of Delaware shall be at Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County of New Castle, and the registered agent in charge thereof shall be The Corporation Trust Company.

Section 2. Other Offices. The Corporation may also have an office or offices, and keep the books and records of the Corporation, except as may otherwise be required by law, at such other place or places, either within or without the State of Delaware, as the Board of Directors may from time to time determine or the business of the Corporation require.

ARTICLE II

MEETINGS OF STOCKHOLDERS

Section 1. Place of Meeting. All meetings of the stockholders of the Corporation shall be held at the office of the Corporation or at such other places, within or without the State of Delaware, as may from time to time be fixed by the Board of Directors, the Chairman of the Board or the President.

Section 2. Annual Meetings. The annual meeting of the stockholders of the Corporation for the election of directors and for the transaction of such other business as may properly come before the meeting shall be held on the fourth Thursday in April in each year, if not a legal holiday under the laws of the place where the meeting is to be held, and, if a legal holiday, then on the next succeeding day not a legal holiday under the laws of such place, or on such other date and at such hour as may from time to time be fixed by the Board of Directors, the Chairman of the Board or the President.

In order for business to be properly brought before the meeting by a stockholder, the business must be legally proper and written notice thereof must have been filed with the Secretary of the Corporation not less than 60 nor more than 120 days prior to the meeting. Each such notice shall set forth: (a) the name and address of the stockholder who intends to make the proposal as the same appear in the Corporation's records; (b) the class and number of shares of stock of the Corporation that are beneficially owned, directly or indirectly, by such stockholder; and (c) a clear and concise statement of the proposal and the stockholder's reasons for supporting it.

The filing of a stockholder notice as required above shall not, in and of itself, constitute the making of the proposal described therein.

Article II, Section 2 amended effective as of January 31, 1991

-1-

If the chairman of the meeting determines that any proposed business has not been properly brought before the meeting, he shall declare such business out of order; and such business shall not be conducted at the meeting.

Section 3. Special Meetings. Except as otherwise required by law and subject to the rights of the holders of any class or series of stock having a preference over the Common Stock as to dividends or upon liquidation, special meetings of the stockholders for any purpose or purposes may be called only by
(i) the Chairman of the Board, (ii) the President, or (iii) a majority of the entire Board of Directors. Only such business as is specified in the notice of any special meeting of the stockholders shall come before such meeting.

Section 4. Notice of Meetings. Except as otherwise provided by law, written notice of each meeting of the stockholders, whether annual or special, shall be given, either by personal delivery or by mail, not less than 10 nor more than 60 days before the date of the meeting to each stockholder of record entitled to notice of the meeting. If mailed, such notice shall be deemed given when deposited in the United States mail, postage prepaid, directed to the stockholder at such stockholder's address as it appears on the records of the Corporation. Each such notice shall state the place, date and hour of the meeting, and the purpose or purposes for which the meeting is called. Notice of any meeting of stockholders shall not be required to be given to any stockholder who shall attend such meeting in person or by proxy without protesting, prior to or at the commencement of the meeting, the lack of proper notice to such stockholder, or who shall waive notice thereof as provided in Article X of these Bylaws. Notice of adjournment of a meeting of stockholders need not be given if the time and place to which it is adjourned are announced at such meeting, unless the adjournment is for more than 30 days or, after adjournment, a new record date is fixed for the adjourned meeting.

Section 5. Quorum. Except as otherwise provided by law or by the Certificate of Incorporation of the Corporation, the holders of a majority of the votes entitled to be cast by the stockholders entitled to vote, which if any vote is to be taken by classes shall mean the holders of a majority of the votes entitled to be cast by the stockholders of each such class, present in person or represented by proxy, shall constitute a quorum for the transaction of business at any meeting of the stockholders.

Section 6. Adjournments. In the absence of a quorum, the holders of a majority of the votes entitled to be cast by the stockholders, present in person or represented by proxy, may adjourn the meeting from time to time. At any such adjourned meeting at which a quorum may be present, any business may be transacted which might have been transacted at the meeting as originally called.

Section 7. Order of Business. At each meeting of the stockholders, the Chairman of the Board, or, in the absence of the Chairman of the Board, the President, shall act as chairman. The order of business at each such meeting shall be as determined by the chairman of the meeting. The chairman of the meeting shall have the right and authority to prescribe such rules, regulations and procedures and to do all such acts and things as are necessary or desirable for the proper conduct of the meeting, including, without limitation, the establishment of procedures for the maintenance of order and safety, limitations on the time allotted to questions or comments on the affairs of the Corporation, restrictions on entry to such meeting after the time prescribed for the commencement thereof, and the opening and closing of the voting polls. The chairman of the meeting shall announce at each such meeting the date and time of the opening and the closing of the voting polls for each matter upon which the stockholders will vote at such meeting.

Section 8. List of Stockholders. It shall be the duty of the Secretary or other officer of the Corporation who has charge of the stock ledger to prepare and make, at least 10 days before each meeting of the

Article II, Section 7 amended effective as of January 31, 1991

-2-

stockholders, a complete list of the stockholders entitled to vote thereat, arranged in alphabetical order, and showing the address of each stockholder and the number of shares registered in such stockholder's name. Such list shall be produced and kept available at the times and places required by law.

Section 9. Voting. Except as otherwise provided by law or by the Certificate of Incorporation of the Corporation, each stockholder of record of any class or series of stock having a preference over the Common Stock of the Corporation as to dividends or upon liquidation shall be entitled at each meeting of stockholders to such number of votes for each share of such stock as may be fixed in the Certificate of Incorporation or in the resolution or resolutions adopted by the Board of Directors providing for the issuance of such stock, and each stockholder of record of Common Stock shall be entitled at each meeting of stockholders to one vote for each share of such stock, in each case, registered in such stockholder's name on the books of the Corporation:

(a) on the date fixed pursuant to Section 6 of Article VII of these Bylaws as the record date for the determination of stockholders entitled to notice of and to vote at such meeting; or

(b) if no such record date shall have been so fixed, then at the close of business on the day next preceding the date on which notice of such meeting is given, or, if notice is waived, at the close of business on the day next preceding the day on which the meeting is held.

Each stockholder entitled to vote at any meeting of stockholders may authorize not in excess of three persons to act for such stockholder by a proxy signed by such stockholder or such stockholder's attorney-in-fact. Any such proxy shall be delivered to the secretary of such meeting at or prior to the time designated for holding such meeting but, in any event, not later than the time designated in the order of business for so delivering such proxies. No such proxy shall be voted or acted upon after three years from its date, unless the proxy provides for a longer period.

At each meeting of the stockholders, all corporate actions, other than the election of directors, to be taken by vote of the stockholders (except as otherwise required by law and except as otherwise provided in the Certificate of Incorporation) shall be authorized by a majority of the votes cast by the stockholders entitled to vote thereon, present in person or represented by proxy. Directors shall be elected by a plurality of the votes of the shares present in person or represented by proxy at the meeting and entitled to vote on the election of the directors. Where a separate vote by a class or classes is required, the affirmative vote of the majority of shares of such class or classes present in person or represented by proxy at the meeting shall be the act of such class.

Unless required by law or determined by the chairman of the meeting to be advisable, the vote on any matter, including the election of directors, need not be by written ballot. In the case of a vote by written ballot, each ballot shall be signed by the stockholder voting, or by such stockholder's proxy, and shall state the number of shares voted.

Section 10. Inspectors of Election. Either the Board of Directors or, in the absence of an appointment of inspectors by the Board, the Chairman of the Board or the President shall, in advance of each meeting of the stockholders, appoint one or more inspectors to act at such meeting and make a written report thereof. In connection with any such appointment, one or more persons may, in the discretion of the body or person making such appointment, be designated as alternate inspectors to replace any inspector who fails to act. If no inspector or alternate is able to act at any meeting of stockholders, the chairman of such meeting shall appoint

Article II, Section 9 amended effective as of October 29, 1987; Article II, Section 10 amended effective as of January 31, 1991

-3-

one or more inspectors to act at such meeting. Each such inspector shall perform such duties as are required by law and as shall be specified by the Board, the Chairman of the Board, the President or the chairman of the meeting. Each such inspector, before entering upon the discharge of his duties, shall take and sign an oath faithfully to execute the duties of inspector with strict impartiality and according to the best of his ability. Inspectors need not be stockholders. No director or nominee for the office of director shall be appointed such an inspector.

ARTICLE III

BOARD OF DIRECTORS

Section 1. General Powers. The business and affairs of the Corporation shall be managed by or under the direction of the Board of Directors, which may exercise all such powers of the Corporation and do all such lawful acts and things as are not by law or by the Certificate of Incorporation of the Corporation directed or required to be exercised or done by the stockholders.

Section 2. Number, Qualification and Election. Except as otherwise provided in any resolution or resolutions adopted by the Board of Directors pursuant to the provisions of Article IV of the Certificate of Incorporation of the Corporation relating to the rights of the holders of any class or series of stock having a preference over the Common Stock as to dividends or upon liquidation, the number of directors of the Corporation shall be fixed from time to time by resolution adopted by vote of a majority of the entire Board of Directors, provided that the number so fixed shall not be less than three.

The directors, other than those who may be elected by the holders of shares of any class or series of stock having a preference over the Common Stock as to dividends or upon liquidation pursuant to the terms of any resolution or resolutions providing for the issuance of such stock adopted by the Board, shall be classified, with respect to the time for which they severally hold office, into three classes as follows: one class of one director shall be originally elected for a term expiring at the annual meeting of stockholders to be held in 1986, another class of two directors shall be originally elected for a term expiring at the annual meeting of stockholders to be held in 1987, and another class of two directors shall be originally elected for a term expiring at the annual meeting of stockholders to be held in 1988, with each class to hold office until its successors are elected and qualified. Any newly created directorships resulting from any increase in the number of directors shall be allocated to the classes of directors described in the immediately preceding sentence in such manner so as to maintain, as nearly as possible, the equality in number of the directors in each class. At each annual meeting of the stockholders of the Corporation, the successors of the class of directors whose term expires at that meeting shall be elected to hold office for a term expiring at the annual meeting of stockholders held in the third year following the year of their election.

Each director shall be at least 21 years of age. A person shall be eligible to be elected a director of the Corporation until the annual meeting of stockholders of the Corporation next succeeding such person's 70th

Article III, Section 2 amended December 28, 1987, but effective as of January 29, 1988; amended effective as of February 4, 1988; amended January 30, 1992; amended effective as of February 10, 1993; amended effective as of July 29, 1993

-4-

birthday, and any person serving as a director on such director's 70th birthday shall be eligible to complete such director's term as such. Directors need not be stockholders of the Corporation.

Subject to the rights of the holders of any class or series of stock having a preference over the Common Stock as to dividends or upon liquidation, at each annual meeting of the stockholders, there shall be elected the directors of the class the term of office of which shall then expire.

In any election of directors, the persons receiving a plurality of the votes cast, up to the number of directors to be elected in such election, shall be deemed elected.

Section 3. Notification of Nominations. Subject to the rights of the holders of any class or series of stock having a preference over the Common Stock as to dividends or upon liquidation, nominations for the election of directors may be made by the Board of Directors or by any stockholder entitled to vote for the election of directors. Any stockholder entitled to vote for the election of directors at a meeting may nominate persons for election as directors only if written notice of such stockholder's intent to make such nomination is given, either by personal delivery or by United States mail, postage prepaid, to the Secretary of the Corporation not later than (i) with respect to an election to be held at an annual meeting of stockholders, 90 days in advance of such meeting, and (ii) with respect to an election to be held at a special meeting of stockholders for the election of directors, the close of business on the seventh day following the date on which notice of such meeting is first given to stockholders. Each such notice shall set forth: (a) the name and address of the stockholder who intends to make the nomination of the person or persons to be nominated; (b) a representation that the stockholder is a holder of record of stock of the Corporation entitled to vote at such meeting and intends to appear in person or by proxy at the meeting to nominate the person or persons specified in the notice; (c) a description of all arrangements or understandings between the stockholder and each nominee and any other person or persons (naming such person or persons) pursuant to which the nomination or nominations are to be made by the stockholder; (d) such other information regarding each nominee proposed by such stockholder as would have been required to be included in a proxy statement filed pursuant to the proxy rules of the Securities and Exchange Commission had each nominee been nominated, or intended to be nominated, by the Board of Directors; and (e) the consent of each nominee to serve as a director of the Corporation if so elected. The chairman of the meeting may refuse to acknowledge the nomination of any person not made in compliance with the foregoing procedure.

Section 4. Quorum and Manner of Acting. Except as otherwise provided by law, the Certificate of Incorporation of the Corporation or these Bylaws, a majority of the entire Board of Directors shall constitute a quorum for the transaction of business at any meeting of the Board, and, except as so provided, the vote of a majority of the directors present at any meeting at which a quorum is present shall be the act of the Board. In the absence of a quorum, a majority of the directors present may adjourn the meeting to another time and place. At any adjourned meeting at which a quorum is present, any business that might have been transacted at the meeting as originally called may be transacted.

Section 5. Place of Meeting. The Board of Directors may hold its meetings at such place or places within or without the State of Delaware as the Board may from time to time determine or as shall be specified or fixed in the respective notices or waivers of notice thereof.

Section 6. Regular Meetings. Regular meetings of the Board of Directors shall be held at such times and places as the Board shall from time to time by resolution determine. If any day fixed for a regular meeting shall be a legal holiday under the laws of the place where the meeting is to be held, the meeting that would otherwise be held on that day shall be held at the same hour on the next succeeding business day.

Section 7. Special Meetings. Special meetings of the Board of Directors shall be held whenever called by the Chairman of the Board or the President or by a majority of the directors.

-5-

Section 8. Notice of Meetings. Notice of regular meetings of the Board of Directors or of any adjourned meeting thereof need not be given. Notice of each special meeting of the Board shall be mailed or transmitted by delivery service to each director, addressed to such director at such director's residence or usual place of business, at least two days before the day on which the meeting is to be held or shall be sent to such director at such place by telegraph or facsimile telecommunication or be given personally or by telephone, not later than the day before the meeting is to be held, but notice need not be given to any director who shall, either before or after the meeting, submit a signed waiver of such notice or who shall attend such meeting without protesting, prior to or at its commencement, the lack of notice to such director. Every such notice shall state the time and place but need not state the purpose of the meeting.

Section 9. Rules and Regulations. The Board of Directors may adopt such rules and regulations not inconsistent with the provisions of law, the Certificate of Incorporation of the Corporation or these Bylaws for the conduct of its meetings and management of the affairs of the Corporation as the Board may deem proper.

Section 10. Participation in Meeting by Means of Communication Equipment. Any one or more members of the Board of Directors or any committee thereof may participate in any meeting of the Board or of any such committee by means of conference telephone or similar communications equipment by means of which all persons participating in the meeting can hear each other, and such participation in a meeting shall constitute presence in person at such meeting.

Section 11. Action Without Meeting. Any action required or permitted to be taken at any meeting of the Board of Directors or any committee thereof may be taken without a meeting if all of the members of the Board or of any such committee consent thereto in writing and the writing or writings are filed with the minutes of proceedings of the Board or of such committee.

Section 12. Resignations. Any director of the Corporation may at any time resign by giving written notice to the Board of Directors, the Chairman of the Board, the President or the Secretary of the Corporation. Such resignation shall take effect at the time specified therein or, if the time be not specified, upon receipt thereof; and unless otherwise specified therein, the acceptance of such resignation shall not be necessary to make it effective.

Section 13. Removal of Directors. Directors may be removed only as provided in Section 4 of Article VI of the Certificate of Incorporation of the Corporation.

Section 14. Vacancies. Subject to the rights of the holders of any class or series of stock having a preference over the Common Stock as to dividends or upon liquidation, any vacancies on the Board of Directors resulting from death, resignation, removal or other cause shall be filled only in the manner provided in Section 3 of Article VI of the Certificate of Incorporation of the Corporation, and newly created directorships resulting from any increase in the number of directors shall be filled in the manner provided in Section 3 of Article VI of the Certificate of Incorporation of the Corporation or, if not so filled, by the stockholders at the next annual meeting thereof or at a special meeting called for that purpose in accordance with Section 3 of Article II of these Bylaws.

Section 15. Compensation. Each director who shall not at the time also be a salaried officer or employee of the Corporation or any of its subsidiaries (hereinafter referred to as an "outside director"), in consideration of such person serving as a director, shall be entitled to receive from the Corporation such amount per annum and such fees for attendance at meetings of the Board of Directors or of committees of the Board, or both, as the Board shall from time to time determine. In addition, each director, whether or not an outside director, shall be entitled to receive from the Corporation reimbursement for the reasonable expenses incurred

Article III, Section 8 amended January 30, 1992

-6-

by such person in connection with the performance of such person's duties as a director. Nothing contained in this Section 15 shall preclude any director from serving the Corporation or any of its subsidiaries in any other capacity and receiving proper compensation therefor.

Section 16. Directors Emeritus. The Board of Directors may appoint one or more directors emeritus as it shall from time to time determine. Each director emeritus appointed shall hold office at the pleasure of the Board of Directors. A director emeritus shall be entitled, but shall have no obligation, to attend and be present at the meetings of the Board of Directors, although a meeting of the Board of Directors may be held without notice to any director emeritus and no director emeritus shall be considered in determining whether a quorum of the Board of Directors is present. A director emeritus shall advise and counsel the Board of Directors on the business and operations of the Corporation as requested by the Board of Directors; however, a director emeritus shall not be entitled to vote on any matter presented to the Board of Directors. A director emeritus, in consideration of such person serving as a director emeritus, shall be entitled to receive from the Corporation such fees for attendance at meetings of the Board of Directors as the Board shall from time to time determine. In addition, a director emeritus shall be entitled to receive from the Corporation reimbursement for the reasonable expenses incurred by such person in connection with the performance of such person's duties as a director emeritus.

ARTICLE IV

EXECUTIVE AND OTHER COMMITTEES

Section 1. Executive Committee. The Board of Directors may designate an Executive Committee which shall consist of three or more of the directors of the Corporation. The Board may designate one or more directors as alternate members of the Executive Committee, who may replace any absent or disqualified member at any meeting of the Executive Committee. In the absence or disqualification of a member of the Executive Committee, the member or members present at any meeting and not disqualified from voting, whether or not such member or members constitute a quorum, may unanimously appoint another member of the Board of Directors to act at the meeting in the place of any such absent or disqualified member. The Executive Committee shall have and may exercise all the powers and authority of the Board in the management of the business and affairs of the Corporation, and may authorize the seal of the Corporation to be affixed to all papers that may require it, except that neither the Executive Committee nor any other committee of the Board shall have the power or authority in reference to:

(a) approving or adopting, or recommending to the stockholders, any action or matter expressly required by the Delaware General Corporation Law to be submitted to stockholders for approval; or

(b) adopting, amending or repealing any Bylaw.

The Board shall have power at any time to change the membership of the Executive Committee, to fill all vacancies in it and to discharge it, either with or without cause.

Section 2. Other Committees. The Board of Directors may designate one or more committees other than the Executive Committee, each of which shall consist of one or more of the directors of the Corporation. The Board may designate one or more directors as alternate members of any such committee, who may replace any absent or disqualified member at any meeting of such committee. In addition, in the absence or

Article III, Section 16 added effective as of February 12, 1987; Article IV amended effective as of January 29, 1998

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disqualification of a member of any such committee, the member or members present at any meeting and not disqualified from voting, whether or not such member or members constitute a quorum, may unanimously appoint another member of the Board of Directors to act at the meeting in the place of any such absent or disqualified member. Each such committee of the Board, except as otherwise provided by law, the Certificate of Incorporation of the Corporation or these Bylaws, shall have and may exercise such authority of the Board as may be specified in the resolution or resolutions of the Board designating such committee. The Board shall have power at any time to change the membership of, to fill all vacancies in and to discharge any such committee, either with or without cause.

Section 3. Procedure; Meetings; Quorum. Regular meetings of any committee of the Board of Directors (including the Executive Committee), of which no notice shall be necessary, may be held at such times and places as shall be fixed by resolution adopted by a majority of the members thereof. Special meetings of any committee of the Board of Directors (including the Executive Committee) shall be called at the request of any member thereof. Notice of each special meeting of any committee of the Board of Directors (including the Executive Committee) shall be sent by mail, delivery service, facsimile telecommunication, telegraph or telephone, or be delivered personally to each member thereof not later than the day before the day on which the meeting is to be held, but notice need not be given to any member who shall, either before or after the meeting, submit a signed waiver of such notice or who shall attend such meeting without protesting, prior to or at its commencement, the lack of such notice to such member. Any special meeting of any committee of the Board (including the Executive Committee) shall be a legal meeting without any notice thereof having been given, if all the members thereof shall be present thereat. Notice of any adjourned meeting of any committee of the Board (including the Executive Committee) need not be given. Any committee of the Board (including the Executive Committee) may adopt such rules and regulations not inconsistent with the provisions of law, the Certificate of Incorporation of the Corporation or these Bylaws for the conduct of its meetings as such committee may deem proper. A majority of the members of any committee of the Board (including the Executive Committee) shall constitute a quorum for the transaction of business at any meeting, and the vote of a majority of the members thereof present at any meeting at which a quorum is present shall be the act of such committee. Each committee of the Board of Directors (including the Executive Committee) shall keep written minutes of its proceedings and shall report on such proceedings to the Board.

ARTICLE V

OFFICERS

Section 1. Number; Term of Office. The officers of the Corporation shall be a Chairman of the Board, a President, one or more Vice Presidents, a Treasurer, a Secretary, a Controller, and such other officers or agents with such titles and such duties as the Board of Directors may from time to time determine, each to have such authority, functions or duties as in these Bylaws provided or as the Board may from time to time determine, and each to hold office for such term as may be prescribed by the Board and until such person's successor shall have been chosen and shall qualify, or until such person's death or resignation, or until such person's removal in the manner hereinafter provided. The Chairman of the Board and the President shall be elected from among the directors. One person may hold the offices and perform the duties of any two or more of said officers; provided, however, that no officer shall execute, acknowledge or verify any instrument in more than one capacity if such instrument is required by law, the Certificate of Incorporation of the Corporation or these Bylaws to be executed, acknowledged or verified by two or more officers. The Board may from time to time authorize any officer to appoint and remove any such other officers and agents and to prescribe their powers and duties. The Board may require any officer or agent to give security for the faithful performance of such person's duties.

Article IV, Section 3 amended January 30, 1992

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Section 2. Removal. Any officer may be removed, either with or without cause, by the Board of Directors at any meeting thereof called for that purpose, or, except in the case of any officer elected by the Board, by any committee or superior officer upon whom such power may be conferred by the Board.

Section 3. Resignation. Any officer may resign at any time by giving notice to the Board of Directors, the President or the Secretary of the Corporation. Any such resignation shall take effect at the date of receipt of such notice or at any later date specified therein; and, unless otherwise specified therein, the acceptance of such resignation shall not be necessary to make it effective.

Section 4. Vacancies. A vacancy in any office because of death, resignation, removal or any other cause may be filled for the unexpired portion of the term in the manner prescribed in these Bylaws for election to such office.

Section 5. The President. The President shall be the chief executive officer of the Corporation and as such shall have general supervision and direction of the business and affairs of the Corporation, subject to the control of the Board of Directors. The President shall, if present and in the absence of the Chairman of the Board, preside at meetings of the stockholders, meetings of the Board and meetings of the Executive Committee. The President shall perform such other duties as the Board may from time to time determine. The President may sign and execute in the name of the Corporation deeds, mortgages, bonds, contracts or other instruments authorized by the Board or any committee thereof empowered to authorize the same.

Section 6. Chairman of the Board. The Chairman of the Board shall, if present, preside at meetings of the stockholders, meetings of the Board and meetings of the Executive Committee. The Chairman of the Board shall counsel with and advise the President and perform such other duties as the President or the Board or the Executive Committee may from time to time determine.

Section 7. Vice Presidents. Each Vice President shall have such powers and duties as shall be prescribed by the President, the Chairman of the Board or the Board of Directors. Any Vice President may sign and execute in the name of the Corporation deeds, mortgages, bonds, contracts or other instruments authorized by the Board or any committee thereof empowered to authorize the same.

Section 8. Treasurer. The Treasurer shall perform all duties incident to the office of Treasurer and such other duties as from time to time may be assigned to the Treasurer by the President, the Chairman of the Board or the Board of Directors.

Section 9. Secretary. It shall be the duty of the Secretary to act as secretary at all meetings of the Board of Directors, of the Executive Committee and of the stockholders and to record the proceedings of such meetings in a book or books to be kept for that purpose; the Secretary shall see that all notices required to be given by the Corporation are duly given and served; the Secretary shall be custodian of the seal of the Corporation and shall affix the seal or cause it to be affixed to all certificates of stock of the Corporation (unless the seal of the Corporation on such certificates shall be a facsimile, as hereinafter provided) and to all documents, the execution of which on behalf of the Corporation under its seal is duly authorized in accordance with the provisions of these Bylaws. The Secretary shall have charge of the stock ledger and also of the other books, records and papers of the Corporation and shall see that the reports, statements and other documents required by law are properly kept and filed; and the Secretary shall in general perform all the duties incident to the office of Secretary and such other duties as from time to time may be assigned to such person by the President, the Chairman of the Board or the Board of Directors.

Section 10. Controller. The Controller shall perform all of the duties incident to the office of the Controller and such other duties as from time to time may be assigned to such person by the President, the Chairman of the Board or the Board of Directors.

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Section 11. Assistant Treasurers, Secretaries and Controllers. The Assistant Treasurers, the Assistant Secretaries and the Assistant Controllers shall perform such duties as shall be assigned to them by the Treasurer, Secretary or Controller, respectively, or by the President, the Chairman of the Board or the Board of Directors.

ARTICLE VI

INDEMNIFICATION OF DIRECTORS, OFFICERS, EMPLOYEES AND AGENTS

Section 1. Third Party Actions. The Corporation shall indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the Corporation), by reason of the fact that such person is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the Corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe such person's conduct was unlawful. The termination of any action, suit or proceeding by judgment, order, settlement, conviction, or upon a plea of nolo contendere or its equivalent, shall not, of itself, create a presumption that the person did not act in good faith and in a manner which such person reasonably believed to be in or not opposed to the best interests of the Corporation, and, with respect to any criminal action or proceeding, had reasonable cause to believe that such person's conduct was unlawful.

Section 2. Derivative Actions. The Corporation shall indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the Corporation to procure a judgment in its favor by reason of the fact that such person is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees) actually and reasonably incurred by such person in connection with the defense or settlement of such action or suit if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the Corporation, except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to the Corporation unless and only to the extent that the Court of Chancery of Delaware or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery of Delaware or such other court shall deem proper.

Section 3. Determination of Indemnification. Any indemnification under Section 1 or 2 of this Article VI (unless ordered by a court) shall be made by the Corporation only as authorized in the specific case upon a determination that indemnification of the present or former director, officer, employee or agent is proper in the circumstances because such person has met the applicable standard of conduct set forth in Section 1 or 2 of this Article
VI. Such determination shall be made, with respect to a person who is a director or officer at

Article VI amended effective as of July 31, 1986; Article VI, Section 3 amended effective as of July 27, 1995; Article VI amended effective as of January 29, 1998

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the time of such determination, (i) by a majority vote of the directors who are not parties to such action, suit or proceeding, even though less than a quorum, or (ii) by a committee of such directors designated by majority vote of such directors, even though less than a quorum, or (iii) if there are not such directors, or if such directors so direct, by independent legal counsel in a written opinion, or (iv) by the stockholders.

Section 4. Right to Indemnification. Notwithstanding the other provisions of this Article VI, to the extent that a present or former director or officer of the Corporation has been successful on the merits or otherwise in defense of any action, suit or proceeding referred to in Section 1 or 2 of this Article VI, or in defense of any claim, issue or matter therein, such person shall be indemnified against expenses (including attorneys' fees) actually and reasonably incurred by such person in connection therewith.

Section 5. Advancement of Expenses. Expenses (including attorneys' fees) incurred by a present or former officer or director in defending any civil, criminal, administrative or investigative action, suit or proceeding shall be paid by the Corporation in advance of the final disposition of such action, suit or proceeding upon receipt by the Corporation of an undertaking by or on behalf of such officer or director to repay all such amounts advanced if it shall ultimately be determined that such person is not entitled to be indemnified by the Corporation under this Article VI or otherwise. Such expenses (including attorneys' fees) incurred by present or former employees or agents of the Corporation other than officers or directors may be so paid upon such terms and conditions, if any, as the Corporation deems appropriate.

Section 6. Indemnification and Advancement of Expenses Not Exclusive. The indemnification and advancement of expenses provided by, or granted pursuant to, the other Sections of this Article VI shall not be deemed exclusive of any other rights to which any person seeking indemnification or advancement of expenses may be entitled under any law, agreement, vote of stockholders or disinterested directors or otherwise, both as to action in such person's official capacity and as to action in another capacity while holding such office. All rights to indemnification and advancement of expenses under this Article VI shall be deemed to be provided by a contract between the Corporation and the director, officer, employee or agent, as the case may be, who served in such capacity at any time while these Bylaws and other relevant provisions of the Delaware General Corporation Law and other applicable law, if any, are in effect. Any repeal or modification thereof shall not affect any rights or obligations then existing.

Section 7. Insurance. The Corporation may purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against any liability asserted against such person and incurred by such person in any such capacity, or arising out of such person's status as such, whether or not the Corporation would have the power to indemnify such person against such liability under the applicable provisions of the Delaware General Corporation Law.

Section 8. Definitions of Certain Terms. For purposes of this Article VI, references to "the Corporation" shall include, in addition to the resulting corporation, any constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger which, if its separate existence had continued, would have had power and authority to indemnify its directors, officers, employees or agents, so that any person who is or was a director, officer, employee or agent of such constituent corporation, or is or was serving at the request of such constituent corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, shall stand in the same position under the provisions of this Article VI with respect to the resulting or surviving corporation as such person would have with respect to such constituent corporation if its separate existence had continued.

Article VI, Section 5 amended effective as of January 31, 1991; amended effective as of October 22, 1992

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For purposes of this Article VI, references to "other enterprise" shall include employee benefit plans; references to "fines" shall include any excise tax assessed on a person with respect to any employee benefit plan; and references to "serving at the request of the Corporation" shall include any service as a director, officer, employee or agent of the Corporation that imposes duties on, or involves services by, such director, officer, employee or agent with respect to an employee benefit plan, its participants or beneficiaries; and a person who acted in good faith and in a manner such person reasonably believed to be in the interest of the participants and beneficiaries of an employee benefit plan shall be deemed to have acted in a manner "not opposed to the best interests of the Corporation" as referred to in this Article VI.

Section 9. Continuation and Successors. The indemnification and advancement of expenses provided by, or granted pursuant to, this Article VI shall, unless otherwise provided when authorized or ratified, continue as to a person who has ceased to be a director, officer, employee or agent and shall inure to the benefit of the heirs, executors and administrators of such a person.

Section 10. Exclusive Jurisdiction. The Delaware Court of Chancery is vested with exclusive jurisdiction to hear and determine all actions for advancement of expenses or indemnification brought under this Article VI or under any statute, agreement, vote of stockholders or disinterested directors, or otherwise. The Delaware Court of Chancery may summarily determine the Corporation's obligation to advance expenses (including attorneys' fees).

ARTICLE VII

CAPITAL STOCK

Section 1. Certificates for Shares. Certificates representing shares of stock of each class of the Corporation, whenever authorized by the Board of Directors, shall be in such form as shall be approved by the Board. The certificates representing shares of stock of each class shall be signed by, or in the name of, the Corporation by the Chairman of the Board or the President or a Vice President and by the Secretary or an Assistant Secretary or the Treasurer or an Assistant Treasurer of the Corporation, and sealed with the seal of the Corporation, which may be by a facsimile thereof. Any or all such signatures may be facsimiles if countersigned by a transfer agent or registrar. Although any officer, transfer agent or registrar whose manual or facsimile signature is affixed to such a certificate ceases to be such officer, transfer agent or registrar before such certificate has been issued, it may nevertheless be issued by the Corporation with the same effect as if such officer, transfer agent or registrar were still such at the date of its issue.

The stock ledger and blank share certificates shall be kept by the Secretary or by a transfer agent or by a registrar or by any other officer or agent designated by the Board.

Section 2. Transfer of Shares. Transfer of shares of stock of each class of the Corporation shall be made only on the books of the Corporation by the holder thereof, or by such holder's attorney thereunto authorized by a power of attorney duly executed and filed with the Secretary of the Corporation or a transfer agent for such stock, if any, and on surrender of the certificate or certificates for such shares properly endorsed or accompanied by a duly executed stock transfer power and the payment of all taxes thereon. The person in whose name shares stand on the books of the Corporation shall be deemed the owner thereof for all purposes as regards the Corporation; provided, however, that whenever any transfer of shares shall be made for collateral security and not absolutely, and written notice thereof shall be given to the Secretary or to such transfer agent, such fact shall be stated in the entry of the transfer. No transfer of shares shall be valid as against the Corporation, its stockholders and creditors for any purpose, except to render the transferee liable for the debts of the Corporation to the extent provided by law, until it shall have been entered in the stock records of the Corporation by an entry showing from and to whom transferred.

Article VI, Section 10 added effective as of July 27, 1995

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Section 3. Address of Stockholders. Each stockholder shall designate to the Secretary or transfer agent of the Corporation an address at which notices of meetings and all other corporate notices may be served or mailed to such person, and, if any stockholder shall fail to designate such address, corporate notices may be served upon such person by mail directed to such person at such person's post office address, if any, as the same appears on the share record books of the Corporation or at such person's last known post office address.

Section 4. Lost, Destroyed and Mutilated Certificates. The holder of any share of stock of the Corporation shall immediately notify the Corporation of any loss, theft, destruction or mutilation of the certificate therefor; the Corporation may issue to such holder a new certificate or certificates for shares, upon the surrender of the mutilated certificate or, in the case of loss, theft or destruction of the certificate, upon satisfactory proof of such loss, theft or destruction; the Board of Directors, or a committee designated thereby, or the transfer agents and registrars for the stock, may, in their discretion, require the owner of the lost, stolen or destroyed certificate, or such person's legal representative, to give the Corporation a bond in such sum and with such surety or sureties as they may direct to indemnify the Corporation and said transfer agents and registrars against any claim that may be made on account of the alleged loss, theft or destruction of any such certificate or the issuance of such new certificate.

Section 5. Regulations. The Board of Directors may make such additional rules and regulations as it may deem expedient concerning the issue and transfer of certificates representing shares of stock of each class of the Corporation and may make such rules and take such action as it may deem expedient concerning the issue of certificates in lieu of certificates claimed to have been lost, destroyed, stolen or mutilated.

Section 6. Fixing Date for Determination of Stockholders of Record. In order that the Corporation may determine the stockholders entitled to notice of or to vote at any meeting of stockholders or any adjournment thereof, or entitled to receive payment of any dividend or other distribution or allotment of any rights, or entitled to exercise any rights in respect of any change, conversion or exchange of stock or for the purpose of any other lawful action, the Board of Directors may fix a record date, which record date shall not precede the date upon which the resolution fixing the record date is adopted by the Board of Directors, and which record date shall not be more than 60 nor less than 10 days before the date of such meeting, nor more than 60 days prior to any other action. A determination of stockholders entitled to notice of or to vote at a meeting of the stockholders shall apply to any adjournment of the meeting; provided, however, that the Board of Directors may fix a new record date for the adjourned meeting.

ARTICLE VIII

SEAL

The Board of Directors shall provide a corporate seal, which shall be in the form of a circle and shall bear the full name of the Corporation and the words and figures "Corporate Seal Delaware 1939", or such other words or figures as the Board of Directors may approve and adopt. The seal may be used by causing it or a facsimile thereof to be impressed or affixed or in any other manner reproduced.

ARTICLE IX

FISCAL YEAR

The fiscal year of the Corporation shall be fixed by resolution of the Board of Directors.

Article VII, Section 6 amended effective as of October 29, 1987

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ARTICLE X

WAIVER OF NOTICE

Whenever any notice whatsoever is required to be given by these Bylaws, by the Certificate of Incorporation of the Corporation or by law, the person entitled thereto may, either before or after the meeting or other matter in respect of which such notice is to be given, waive such notice in writing, which writing shall be filed with or entered upon the records of the meeting or the records kept with respect to such other matter, as the case may be, and in such event such notice need not be given to such person and such waiver shall be deemed equivalent to such notice.

ARTICLE XI

AMENDMENTS

Any Bylaw (other than this Article XI) may be adopted, repealed, altered or amended by a majority of the entire Board of Directors at any meeting thereof, provided that such proposed action in respect thereof shall be stated in the notice of such meeting. The stockholders of the Corporation shall have the power to adopt, repeal, alter or amend any provision of these Bylaws only to the extent and in the manner provided in the Certificate of Incorporation of the Corporation.

ARTICLE XII

MISCELLANEOUS

Section 1. Execution of Documents. The Board of Directors or any committee thereof shall designate the officers, employees and agents of the Corporation who shall have power to execute and deliver deeds, contracts, mortgages, bonds, debentures, notes, checks, drafts and other orders for the payment of money and other documents for and in the name of the Corporation and may authorize such officers, employees and agents to delegate such power (including authority to redelegate) by written instrument to other officers, employees or agents of the Corporation. Such delegation may be by resolution or otherwise and the authority granted shall be general or confined to specific matters, all as the Board or any such committee may determine. In the absence of such designation referred to in the first sentence of this Section 1, the officers of the Corporation shall have such power so referred to, to the extent incident to the normal performance of their duties.

Section 2. Deposits. All funds of the Corporation not otherwise employed shall be deposited from time to time to the credit of the Corporation or otherwise as the Board of Directors or any committee thereof or any officer of the Corporation to whom power in that respect shall have been delegated by the Board or any such committee shall select.

Section 3. Checks. All checks, drafts and other orders for the payment of money out of the funds of the Corporation, and all notes or other evidence of indebtedness of the Corporation, shall be signed on behalf of the Corporation in such manner as shall from time to time be determined by resolution of the Board of Directors or of any committee thereof.

Section 4. Proxies in Respect of Stock or Other Securities of Other Corporations. The Board of Directors or any committee thereof shall designate the officers of the Corporation who shall have authority from time to time to appoint an agent or agents of the Corporation to exercise in the name and on behalf of the Corporation the powers and rights that the Corporation may have as the holder of stock or other securities in

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any other corporation, and to vote or consent in respect of such stock or securities; such designated officers may instruct the person or persons so appointed as to the manner of exercising such powers and rights; and such designated officers may execute or cause to be executed in the name and on behalf of the Corporation and under its corporate seal, or otherwise, such written proxies, powers of attorney or other instruments as they may deem necessary or proper in order that the Corporation may exercise its said powers and rights.

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EXHIBIT 3.8

AMENDED BYLAWS
OF
NOBLE DRILLING CORPORATION

ARTICLE IV

EXECUTIVE AND OTHER COMMITTEES

Section 1. Executive Committee. The Board of Directors may designate an Executive Committee which shall consist of three or more of the directors of the Corporation. The Board may designate one or more directors as alternate members of the Executive Committee, who may replace any absent or disqualified member at any meeting of the Executive Committee. In the absence or disqualification of a member of the Executive Committee, the member or members present at any meeting and not disqualified from voting, whether or not such member or members constitute a quorum, may unanimously appoint another member of the Board of Directors to act at the meeting in the place of any such absent or disqualified member. The Executive Committee shall have and may exercise all the powers and authority of the Board in the management of the business and affairs of the Corporation, and may authorize the seal of the Corporation to be affixed to all papers that may require it, except that neither the Executive Committee nor any other committee of the Board shall have the power or authority in reference to:

(a) approving or adopting, or recommending to the stockholders, any action or matter expressly required by the Delaware General Corporation Law to be submitted to stockholders for approval; or

(b) adopting, amending or repealing any Bylaw.

The Board shall have power at any time to change the membership of the Executive Committee, to fill all vacancies in it and to discharge it, either with or without cause.

Section 2. Other Committees. The Board of Directors may designate one or more committees other than the Executive Committee, each of which shall consist of one or more of the directors of the Corporation. The Board may designate one or more directors as alternate members of any such committee, who may replace any absent or disqualified member at any meeting of such committee. In addition, in the absence or disqualification of a member of any such committee, the member or members present at any meeting and not disqualified from voting, whether or not such member or members constitute a quorum, may unanimously appoint another member of the Board of Directors to act at the meeting in the place of any such absent or disqualified member. Each such committee of the Board, except as otherwise provided by law, the Certificate of Incorporation of the Corporation or these Bylaws, shall have and may exercise such authority of the Board as may be specified in the resolution or resolutions of the Board designating such committee. The Board shall have power at any time to change the membership of, to fill all vacancies in and to discharge any such committee, either with or without cause.


Section 3. Procedure; Meetings; Quorum. Regular meetings of any committee of the Board of Directors (including the Executive Committee), of which no notice shall be necessary, may be held at such times and places as shall be fixed by resolution adopted by a majority of the members thereof. Special meetings of any committee of the Board of Directors (including the Executive Committee) shall be called at the request of any member thereof. Notice of each special meeting of any committee of the Board of Directors (including the Executive Committee) shall be sent by mail, delivery service, facsimile telecommunication, telegraph or telephone, or be delivered personally to each member thereof not later than the day before the day on which the meeting is to be held, but notice need not be given to any member who shall, either before or after the meeting, submit a signed waiver of such notice or who shall attend such meeting without protesting, prior to or at its commencement, the lack of such notice to such member. Any special meeting of any committee of the Board (including the Executive Committee) shall be a legal meeting without any notice thereof having been given, if all the members thereof shall be present thereat. Notice of any adjourned meeting of any committee of the Board (including the Executive Committee) need not be given. Any committee of the Board (including the Executive Committee) may adopt such rules and regulations not inconsistent with the provisions of law, the Certificate of Incorporation of the Corporation or these Bylaws for the conduct of its meetings as such committee may deem proper. A majority of the members of any committee of the Board (including the Executive Committee) shall constitute a quorum for the transaction of business at any meeting, and the vote of a majority of the members thereof present at any meeting at which a quorum is present shall be the act of such committee. Each committee of the Board of Directors (including the Executive Committee) shall keep written minutes of its proceedings and shall report on such proceedings to the Board.

ARTICLE VI

INDEMNIFICATION OF DIRECTORS, OFFICERS, EMPLOYEES AND AGENTS

Section 1. Third Party Actions. The Corporation shall indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the Corporation), by reason of the fact that such person is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the Corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe such person's conduct was unlawful. The termination of any action, suit or proceeding by judgment, order, settlement, conviction, or upon a plea of nolo contendere or its equivalent, shall not, of itself, create a presumption that the person did not act in good faith and in a manner which such person reasonably believed to be in or not opposed to the best interests of the Corporation, and, with

2

respect to any criminal action or proceeding, had reasonable cause to believe that such person's conduct was unlawful.

Section 2. Derivative Actions. The Corporation shall indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the Corporation to procure a judgment in its favor by reason of the fact that such person is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees) actually and reasonably incurred by such person in connection with the defense or settlement of such action or suit if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the Corporation, except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to the Corporation unless and only to the extent that the Court of Chancery of Delaware or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery of Delaware or such other court shall deem proper.

Section 3. Determination of Indemnification. Any indemnification under Section 1 or 2 of this Article VI (unless ordered by a court) shall be made by the Corporation only as authorized in the specific case upon a determination that indemnification of the present or former director, officer, employee or agent is proper in the circumstances because such person has met the applicable standard of conduct set forth in Section 1 or 2 of this Article
VI. Such determination shall be made, with respect to a person who is a director or officer at the time of such determination, (i) by a majority vote of the directors who are not parties to such action, suit or proceeding, even though less than a quorum, or (ii) by a committee of such directors designated by majority vote of such directors, even though less than a quorum, or (iii) if there are not such directors, or if such directors so direct, by independent legal counsel in a written opinion, or (iv) by the stockholders.

Section 4. Right to Indemnification. Notwithstanding the other provisions of this Article VI, to the extent that a present or former director or officer of the Corporation has been successful on the merits or otherwise in defense of any action, suit or proceeding referred to in Section 1 or 2 of this Article VI, or in defense of any claim, issue or matter therein, such person shall be indemnified against expenses (including attorneys' fees) actually and reasonably incurred by such person in connection therewith.

Section 5. Advancement of Expenses. Expenses (including attorneys' fees) incurred by a present or former officer or director in defending any civil, criminal, administrative or investigative action, suit or proceeding shall be paid by the Corporation in advance of the final disposition of such action, suit or proceeding upon receipt by the Corporation of an undertaking by or on behalf of such officer or director to repay all such amounts advanced if it shall ultimately be determined that such person is not entitled to be indemnified by the Corporation under this Article VI or otherwise. Such expenses (including attorneys' fees) incurred by present or former

3

employees or agents of the Corporation other than officers or directors may be so paid upon such terms and conditions, if any, as the Corporation deems appropriate.

Section 6. Indemnification and Advancement of Expenses Not Exclusive. The indemnification and advancement of expenses provided by, or granted pursuant to, the other Sections of this Article VI shall not be deemed exclusive of any other rights to which any person seeking indemnification or advancement of expenses may be entitled under any law, agreement, vote of stockholders or disinterested directors or otherwise, both as to action in such person's official capacity and as to action in another capacity while holding such office. All rights to indemnification and advancement of expenses under this Article VI shall be deemed to be provided by a contract between the Corporation and the director, officer, employee or agent, as the case may be, who served in such capacity at any time while these Bylaws and other relevant provisions of the Delaware General Corporation Law and other applicable law, if any, are in effect. Any repeal or modification thereof shall not affect any rights or obligations then existing.

Section 7. Insurance. The Corporation may purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against any liability asserted against such person and incurred by such person in any such capacity, or arising out of such person's status as such, whether or not the Corporation would have the power to indemnify such person against such liability under the applicable provisions of the Delaware General Corporation Law.

Section 8. Definitions of Certain Terms. For purposes of this Article VI, references to "the Corporation" shall include, in addition to the resulting corporation, any constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger which, if its separate existence had continued, would have had power and authority to indemnify its directors, officers, employees or agents, so that any person who is or was a director, officer, employee or agent of such constituent corporation, or is or was serving at the request of such constituent corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, shall stand in the same position under the provisions of this Article VI with respect to the resulting or surviving corporation as such person would have with respect to such constituent corporation if its separate existence had continued.

For purposes of this Article VI, references to "other enterprise" shall include employee benefit plans; references to "fines" shall include any excise tax assessed on a person with respect to any employee benefit plan; and references to "serving at the request of the Corporation" shall include any service as a director, officer, employee or agent of the Corporation that imposes duties on, or involves services by, such director, officer, employee or agent with respect to an employee benefit plan, its participants or beneficiaries; and a person who acted in good faith and in a manner such person reasonably believed to be in the interest of the participants and beneficiaries of an employee benefit plan shall be deemed to have acted in a manner "not opposed to the best interests of the Corporation" as referred to in this Article VI.

4

Section 9. Continuation and Successors. The indemnification and advancement of expenses provided by, or granted pursuant to, this Article VI shall, unless otherwise provided when authorized or ratified, continue as to a person who has ceased to be a director, officer, employee or agent and shall inure to the benefit of the heirs, executors and administrators of such a person.

Section 10. Exclusive Jurisdiction. The Delaware Court of Chancery is vested with exclusive jurisdiction to hear and determine all actions for advancement of expenses or indemnification brought under this Article VI or under any statute, agreement, vote of stockholders or disinterested directors, or otherwise. The Delaware Court of Chancery may summarily determine the Corporation's obligation to advance expenses (including attorneys' fees).

5

EXHIBIT 4.2


NOBLE DRILLING CORPORATION

to

TEXAS COMMERCE BANK NATIONAL ASSOCIATION,
Trustee

FIRST SUPPLEMENTAL INDENTURE

Dated as of May 30, 1997

to

INDENTURE

Dated as of October 1, 1993

$125,000,000

9 1/4% Senior Notes Due 2003



FIRST SUPPLEMENTAL INDENTURE (the "Supplemental Indenture"), dated as of May 30, 1997, between NOBLE DRILLING CORPORATION, a Delaware corporation (the "Company"), and TEXAS COMMERCE BANK NATIONAL ASSOCIATION, as trustee (the "Trustee"), under an Indenture dated as of October 1, 1993 (the "Indenture").

WITNESSETH:

WHEREAS, Section 9.02 of the Indenture provides, among other things, that, with the consent of the Holders of not less than a majority in principal amount of the Outstanding Notes, by Act of said Holders delivered to the Company and the Trustee, the Company, when authorized by a Board Resolution, and the Trustee may enter into an indenture or indentures supplemental to the Indenture for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of the Indenture or of modifying in any manner the rights of the Holders;

WHEREAS, all things necessary to make this Supplemental Indenture a valid supplement to the Indenture in accordance with its terms have been done;

WHEREAS, all capitalized terms used in this Supplemental Indenture which are defined in the Indenture, either directly or by reference therein, have the meanings ascribed to them therein, except to the extent such terms are defined in this Supplemental Indenture or the context clearly requires otherwise;

NOW, THEREFORE, the parties hereto hereby agree as follows:

Section 1.1. Amendment of SECTION 5.01. SECTION 5.01 of the Indenture is amended by deleting subsections (5) and (6) thereof and by deleting as "Events of Default" thereunder any default in the performance or breach of any of the provisions of the Indenture deleted by Section 1.2 of this Supplemental Indenture.

Section 1.2. Deletion of Certain Sections. SECTION 8.01, SECTIONS 10.07 through and including 10.11, SECTIONS 10.14 and 10.15, SECTIONS 10.17 and 10.18 and SECTIONS 12.01 through and including 12.03 of the Indenture are deleted in their entirety.

Section 2. Effectiveness of Supplemental Indenture. Pursuant to an Offer to Purchase and Consent Solicitation Statement dated May 14, 1997 (the "Offer to Purchase"), the Company has offered (the "Offer") to purchase for cash all $84,445,000 principal amount of the Outstanding Notes at a purchase price determined in the manner described therein. The Company shall pay to the Trustee for the account of each Holder ("Eligible Payment Recipient") who has tendered and not duly withdrawn its Notes in the Offer as of June 12, 1997, unless extended (such time and date, as the same may be extended, the "Expiration Date"), an amount equal to the Total Purchase Price or the Purchase Price (each as defined in the Offer to Purchase), as the case may be, plus accrued but unpaid interest to (but excluding) the Payment Date (as defined in the next sentence) (the "Tender Payments"). Notes purchased pursuant to the Offer will be paid for in immediately available funds on the third Business Day after the Expiration Date (or as soon as practicable thereafter) (the "Payment Date"), and the Trustee shall pay the aggregate Tender Payments to the Eligible Payment Recipients in accordance with their respective interests. The provisions of this Supplemental Indenture will not become operative until validly tendered Notes are accepted for payment by the Company. If the Offer is terminated or withdrawn, or the Notes not purchased pursuant to the Offer, the Supplemental Indenture will never become operative.

Section 3. Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

Section 4. Counterparts. This Supplemental Indenture may be signed in any number of counterparts, each of which shall be an original, with the same effect as if the signature thereto and hereto were upon the same instrument.

1

Section 5. Severability Clause. In case any provision in this Supplemental Indenture shall be invalid, illegal or unenforceable, to the extent permitted by law, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

Section 6. Ratification. Except as expressly amended by this Supplemental Indenture, each provision of the Indenture shall remain in full force and effect, and, as amended hereby, the Indenture is in all respects agreed to, ratified and confirmed by each of the Company and the Trustee.

* * *

IN WITNESS WHEREOF, the Company and the Trustee have caused this Supplemental Indenture to be duly executed by their respective officers thereunto duly authorized and their respective seals duly attested to be hereunto affixed all as of the day and year first above written.

"COMPANY"

NOBLE DRILLING CORPORATION

[SEAL]

Attest:                                 By: /s/ BYRON L. WELLIVER
                                            -----------------------------------
                                            Byron L. Welliver
                                            Senior Vice President - Finance
                                            and Treasurer
/s/ JULIE J. ROBERTSON
--------------------------------
Julie J. Robertson
Secretary

"TRUSTEE"

TEXAS COMMERCE BANK NATIONAL
ASSOCIATION, as Trustee

By: /s/ BRUCE C. BOYD
    -----------------------------------
    Name:  Bruce C. Boyd
    Title: Vice President

2

STATE OF TEXAS            )
                          )
COUNTY OF HARRIS          )

BEFORE ME, the undersigned authority, a Notary Public in and for said state, on this day personally appeared Byron L. Welliver and Julie J. Robertson, known to me to be the persons and officers whose names are subscribed to the foregoing instrument and acknowledged to me that the same was the act of the said NOBLE DRILLING CORPORATION, a Delaware corporation, and that they executed the same as the act of said corporation for the purposes and consideration therein expressed, and in the capacity therein stated.

GIVEN UNDER MY HAND AND SEAL OF OFFICE, this 30th day of May, 1997.

/s/ SYLVANA M. BROWNE
-------------------------------------------
Notary Public in and for the State of Texas

My commission expires:               Sylvana M. Browne
                                     -------------------------------------------
                                     Printed Name of Notary Public
July 29, 1997
----------------------------------


STATE OF TEXAS            )
                          )
COUNTY OF HARRIS          )

BEFORE ME, the undersigned authority, a Notary Public in and for said state, on this day personally appeared Bruce C. Boyd known to me to be the persons and officers whose names are subscribed to the foregoing instrument and acknowledged to me that the same was the act of the said TEXAS COMMERCE BANK NATIONAL ASSOCIATION, as trustee, a national banking association, and that they executed the same as the act of said national banking association for the purposes and consideration therein expressed, and in the capacity therein stated.

GIVEN UNDER MY HAND AND SEAL OF OFFICE, this 30th day of May, 1997.

/s/ LEAN E. FOSHEE
-------------------------------------------
Notary Public in and for the State of Texas

My commission expires:               Lean E. Foshee
                                     -------------------------------------------
                                     Printed Name of Notary Public
4/20/98
----------------------------------

3

EXHIBIT 4.4


CREDIT AGREEMENT

among

NOBLE DRILLING CORPORATION,

VARIOUS LENDING INSTITUTIONS,

CREDIT LYONNAIS NEW YORK BRANCH,
as DOCUMENTATION AGENT

and

CHRISTIANIA BANK OG KREDITKASSE ASA,
NEW YORK BRANCH,

as ARRANGER
and ADMINISTRATIVE AGENT


Dated as of August 14, 1997


$200,000,000



TABLE OF CONTENTS

                                                                            Page
                                                                            ----
SECTION 1.  Amount and Terms of Credit  . . . . . . . . . . . . . . . . . .    1
       1.01  Commitment   . . . . . . . . . . . . . . . . . . . . . . . . .    1
       1.02  Minimum Borrowing Amounts, etc.  . . . . . . . . . . . . . . .    1
       1.03  Notice of Borrowing  . . . . . . . . . . . . . . . . . . . . .    2
       1.04  Disbursement of Funds  . . . . . . . . . . . . . . . . . . . .    2
       1.05  Notes  . . . . . . . . . . . . . . . . . . . . . . . . . . . .    3
       1.06  Conversions  . . . . . . . . . . . . . . . . . . . . . . . . .    3
       1.07  Pro Rata Borrowings  . . . . . . . . . . . . . . . . . . . . .    4
       1.08  Interest   . . . . . . . . . . . . . . . . . . . . . . . . . .    4
       1.09  Interest Periods   . . . . . . . . . . . . . . . . . . . . . .    5
       1.10  Increased Costs, Illegality, etc.  . . . . . . . . . . . . . .    6
       1.11  Compensation   . . . . . . . . . . . . . . . . . . . . . . . .    8
       1.12  Change of Lending Office; Limitation on Indemnities  . . . . .    8
       1.13  Replacement of Banks   . . . . . . . . . . . . . . . . . . . .    9

SECTION 2.  Letters of Credit . . . . . . . . . . . . . . . . . . . . . . .   10
       2.01  Letters of Credit  . . . . . . . . . . . . . . . . . . . . . .   10
       2.02  Minimum Stated Amount  . . . . . . . . . . . . . . . . . . . .   10
       2.03  Letter of Credit Requests; Request for Issuance of Letter of
              Credit  . . . . . . . . . . . . . . . . . . . . . . . . . . .   10
       2.04  Agreement to Repay Letter of Credit Payments   . . . . . . . .   11
       2.05  Letter of Credit Participations  . . . . . . . . . . . . . . .   11
       2.06  Increased Costs  . . . . . . . . . . . . . . . . . . . . . . .   14
       2.07  Indemnities  . . . . . . . . . . . . . . . . . . . . . . . . .   14

SECTION 3.  Fees; Commitments . . . . . . . . . . . . . . . . . . . . . . .   15
       3.01  Fees   . . . . . . . . . . . . . . . . . . . . . . . . . . . .   15
       3.02  Voluntary Reduction of Commitments   . . . . . . . . . . . . .   16
       3.03  Mandatory Adjustments of Commitments, etc.   . . . . . . . . .   16

SECTION 4.  Payments  . . . . . . . . . . . . . . . . . . . . . . . . . . .   17
       4.01  Voluntary Prepayments  . . . . . . . . . . . . . . . . . . . .   17
       4.02  Mandatory Prepayments  . . . . . . . . . . . . . . . . . . . .   17
       4.03  Method and Place of Payment  . . . . . . . . . . . . . . . . .   19
       4.04  Net Payments   . . . . . . . . . . . . . . . . . . . . . . . .   19

(i)

                                                                            Page
                                                                            ----
SECTION 5.  Conditions Precedent  . . . . . . . . . . . . . . . . . . . . .   21
       5.01  Execution of Agreement   . . . . . . . . . . . . . . . . . . .   22
       5.02  No Default; Representations and Warranties   . . . . . . . . .   22
       5.03  Officer's Certificate  . . . . . . . . . . . . . . . . . . . .   22
       5.04  Opinions of Counsel  . . . . . . . . . . . . . . . . . . . . .   22
       5.05  Corporate Proceedings  . . . . . . . . . . . . . . . . . . . .   22
       5.06  Existing Indebtedness Agreements   . . . . . . . . . . . . . .   23
       5.07  Adverse Change, etc.   . . . . . . . . . . . . . . . . . . . .   23
       5.08  Litigation   . . . . . . . . . . . . . . . . . . . . . . . . .   23
       5.09  Approvals  . . . . . . . . . . . . . . . . . . . . . . . . . .   23
       5.10  Fees   . . . . . . . . . . . . . . . . . . . . . . . . . . . .   23
       5.11  Guaranty   . . . . . . . . . . . . . . . . . . . . . . . . . .   24
       5.12  Rig Reports  . . . . . . . . . . . . . . . . . . . . . . . . .   24
       5.13  Insurance Report   . . . . . . . . . . . . . . . . . . . . . .   24
       5.14  Projections  . . . . . . . . . . . . . . . . . . . . . . . . .   24
       5.15  Offshore Drilling Contracts  . . . . . . . . . . . . . . . . .   24

SECTION 6.  Representations, Warranties and Agreements  . . . . . . . . . .   25
       6.01  Corporate Status   . . . . . . . . . . . . . . . . . . . . . .   25
       6.02  Corporate Power and Authority  . . . . . . . . . . . . . . . .   25
       6.03  No Violation   . . . . . . . . . . . . . . . . . . . . . . . .   26
       6.04  Litigation   . . . . . . . . . . . . . . . . . . . . . . . . .   26
       6.05  Use of Proceeds; Margin Regulations  . . . . . . . . . . . . .   26
       6.06  Governmental Approvals   . . . . . . . . . . . . . . . . . . .   26
       6.07  Investment Company Act   . . . . . . . . . . . . . . . . . . .   27
       6.08  Public Utility Holding Company Act   . . . . . . . . . . . . .   27
       6.09  True and Complete Disclosure   . . . . . . . . . . . . . . . .   27
       6.10  Financial Condition; Financial Statements; Projections   . . .   27
       6.11  Tax Returns and Payments   . . . . . . . . . . . . . . . . . .   28
       6.12  Employee Benefit Plans   . . . . . . . . . . . . . . . . . . .   28
       6.13  Subsidiaries   . . . . . . . . . . . . . . . . . . . . . . . .   29
       6.14  Patents, etc.  . . . . . . . . . . . . . . . . . . . . . . . .   29
       6.15  Pollution and Other Regulations  . . . . . . . . . . . . . . .   29
       6.16  Properties   . . . . . . . . . . . . . . . . . . . . . . . . .   30
       6.17  Labor Relations  . . . . . . . . . . . . . . . . . . . . . . .   30
       6.18  Existing Indebtedness  . . . . . . . . . . . . . . . . . . . .   31
       6.19  Rig Classification   . . . . . . . . . . . . . . . . . . . . .   31

SECTION 7.  Affirmative Covenants . . . . . . . . . . . . . . . . . . . . .   31
       7.01  Information Covenants  . . . . . . . . . . . . . . . . . . . .   31

(ii)

                                                                            Page
                                                                            ----
       7.02  Books, Records and Inspections   . . . . . . . . . . . . . . .   34
       7.03  Maintenance of Property; Insurance   . . . . . . . . . . . . .   34
       7.04  Payment of Taxes   . . . . . . . . . . . . . . . . . . . . . .   34
       7.05  Consolidated Corporate Franchises  . . . . . . . . . . . . . .   35
       7.06  Compliance with Statutes, etc.   . . . . . . . . . . . . . . .   35
       7.07  Good Repair  . . . . . . . . . . . . . . . . . . . . . . . . .   35
       7.08  End of Fiscal Years; Fiscal Quarters   . . . . . . . . . . . .   35
       7.09  Use of Proceeds  . . . . . . . . . . . . . . . . . . . . . . .   35
       7.10  Rig Valuations   . . . . . . . . . . . . . . . . . . . . . . .   36
       7.11  Additional Guarantors  . . . . . . . . . . . . . . . . . . . .   36
       7.12  ERISA  . . . . . . . . . . . . . . . . . . . . . . . . . . . .   36

SECTION 8.  Negative Covenants  . . . . . . . . . . . . . . . . . . . . . .   36
       8.01  Changes in Business  . . . . . . . . . . . . . . . . . . . . .   36
       8.02  Consolidation, Merger, Sale of Assets, etc.  . . . . . . . . .   37
       8.03  Indebtedness   . . . . . . . . . . . . . . . . . . . . . . . .   37
       8.04  Liens  . . . . . . . . . . . . . . . . . . . . . . . . . . . .   38
       8.05  Restricted Payments  . . . . . . . . . . . . . . . . . . . . .   40
       8.06  Restrictions on Subsidiaries   . . . . . . . . . . . . . . . .   41
       8.07  Transactions with Affiliates   . . . . . . . . . . . . . . . .   42
       8.08  Fleet Rig Management   . . . . . . . . . . . . . . . . . . . .   42
       8.09  Interest Coverage Ratio  . . . . . . . . . . . . . . . . . . .   43
       8.10  Leverage Ratio   . . . . . . . . . . . . . . . . . . . . . . .   43
       8.11  Fleet Market Value   . . . . . . . . . . . . . . . . . . . . .   43
       8.12  Net Worth  . . . . . . . . . . . . . . . . . . . . . . . . . .   43

SECTION 9.  Events of Default . . . . . . . . . . . . . . . . . . . . . . .   43
       9.01  Payments   . . . . . . . . . . . . . . . . . . . . . . . . . .   43
       9.02  Representations, etc.  . . . . . . . . . . . . . . . . . . . .   43
       9.03  Covenants  . . . . . . . . . . . . . . . . . . . . . . . . . .   43
       9.04  Default Under Other Agreements   . . . . . . . . . . . . . . .   44
       9.05  Bankruptcy, etc.   . . . . . . . . . . . . . . . . . . . . . .   44
       9.06  Guaranty   . . . . . . . . . . . . . . . . . . . . . . . . . .   44
       9.07  Judgments  . . . . . . . . . . . . . . . . . . . . . . . . . .   45
       9.08  Employee Benefit Plans   . . . . . . . . . . . . . . . . . . .   45
       9.09  Change of Control  . . . . . . . . . . . . . . . . . . . . . .   45

SECTION 10.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .   46

(iii)

                                                                            Page
                                                                            ----
SECTION 11.  The Administrative Agent . . . . . . . . . . . . . . . . . . .   67
       11.01  Appointment   . . . . . . . . . . . . . . . . . . . . . . . .   67
       11.02  Nature of Duties  . . . . . . . . . . . . . . . . . . . . . .   67
       11.03  Lack of Reliance on the Administrative Agent  . . . . . . . .   68
       11.04  Certain Rights of the Administrative Agent  . . . . . . . . .   68
       11.05  Reliance  . . . . . . . . . . . . . . . . . . . . . . . . . .   68
       11.06  Indemnification   . . . . . . . . . . . . . . . . . . . . . .   69
       11.07  The Administrative Agent in Its Individual Capacity   . . . .   69
       11.08  Holders   . . . . . . . . . . . . . . . . . . . . . . . . . .   69
       11.09  Resignation by the Administrative Agent   . . . . . . . . . .   69

SECTION 12.  Miscellaneous  . . . . . . . . . . . . . . . . . . . . . . . .   70
       12.01  Payment of Expenses, etc.   . . . . . . . . . . . . . . . . .   70
       12.02  Right of Setoff   . . . . . . . . . . . . . . . . . . . . . .   71
       12.03  Notices   . . . . . . . . . . . . . . . . . . . . . . . . . .   72
       12.04  Benefit of Agreement  . . . . . . . . . . . . . . . . . . . .   72
       12.05  No Waiver; Remedies Cumulative  . . . . . . . . . . . . . . .   74
       12.06  Payments Pro Rata   . . . . . . . . . . . . . . . . . . . . .   74
       12.07  Calculations; Computations  . . . . . . . . . . . . . . . . .   75
       12.08  Governing Law; Submission to Jurisdiction; Venue;
              Waiver of Jury Trial  . . . . . . . . . . . . . . . . . . . .   75
       12.09  Counterparts  . . . . . . . . . . . . . . . . . . . . . . . .   76
       12.10  Effectiveness   . . . . . . . . . . . . . . . . . . . . . . .   76
       12.11  Headings Descriptive  . . . . . . . . . . . . . . . . . . . .   76
       12.12  Amendment or Waiver   . . . . . . . . . . . . . . . . . . . .   76
       12.13  Survival  . . . . . . . . . . . . . . . . . . . . . . . . . .   77
       12.14  Domicile of Loans   . . . . . . . . . . . . . . . . . . . . .   77
       12.15  Confidentiality   . . . . . . . . . . . . . . . . . . . . . .   77
       12.16  Registry  . . . . . . . . . . . . . . . . . . . . . . . . . .   77

ANNEX I       --     Commitments
ANNEX II      --     Bank Addresses
ANNEX III     --     Certain Non-Essential Rigs
ANNEX IV      --     Offshore Drilling Contracts
ANNEX V       --     Subsidiaries
ANNEX VI      --     Real Property
ANNEX VII     --     Rigs and Vessels
ANNEX VIII    --     Existing Indebtedness
ANNEX IX      --     Existing Liens
ANNEX X       --     Approved Rig Brokers
ANNEX XI      --     Subsidiary Guarantors

(iv)

EXHIBIT A     --     Form of Notice of Borrowing
EXHIBIT B     --     Form of Note
EXHIBIT C     --     Form of Letter of Credit Request
EXHIBIT D     --     Form of Section 4.04(b)(ii) Certificate
EXHIBIT E-1   --     Form of Opinion of Thompson & Knight, P.C.
EXHIBIT E-2   --     Form of Opinion of White & Case
EXHIBIT F     --     Form of Officers' Certificate
EXHIBIT G     --     Form of Guaranty
EXHIBIT H     --     Form of Compliance Certificate
EXHIBIT I     --     Form of Assignment and Assumption Agreement

(v)

CREDIT AGREEMENT, dated as August 14, 1997, among NOBLE DRILLING CORPORATION (the "Borrower"), a Delaware corporation, the lending institutions listed from time to time on Annex I hereto (each a "Bank" and, collectively, the "Banks"), CREDIT LYONNAIS NEW YORK BRANCH, as Documentation Agent and
CHRISTIANIA BANK OG KREDITKASSE ASA, NEW YORK BRANCH, as Arranger and Administrative Agent (the "Administrative Agent"). Unless otherwise defined herein, all capitalized terms used herein and defined in Section 10 are used herein as so defined.

W I T N E S S E T H :

WHEREAS, subject to the terms and conditions set forth herein, the Banks are willing to make available to the Borrower the credit facilities provided for herein:

NOW, THEREFORE, it is agreed:

SECTION 1. Amount and Terms of Credit.

1.01 Commitment. Subject to and upon the terms and conditions herein set forth, each Bank severally agrees to make a loan or loans (each a "Loan" and, collectively, the "Loans") under the Facility to the Borrower, which Loans (i) shall be made at any time and from time to time on and after the Effective Date and prior to the Maturity Date, (ii) except as hereinafter provided, may, at the option of the Borrower, be incurred and maintained as, and/or converted into, Base Rate Loans or Eurodollar Loans, provided that all Loans made as part of the same Borrowing shall, unless otherwise specifically provided herein, consist of Loans of the same Type, (iii) may be repaid and reborrowed in accordance with the provisions hereof, (iv) shall not exceed in the aggregate for all Banks at any time outstanding, the Total Commitment and
(v) shall not exceed for any Bank at any time outstanding that aggregate principal amount which, when combined with the aggregate outstanding principal amount of all other Loans of such Bank and with such Bank's Adjusted Percentage of the Letter of Credit Outstandings (exclusive of Unpaid Drawings which are repaid with the proceeds of, and simultaneously with the incurrence of, the respective incurrence of Loans) at such time, equals (1) if such Bank is a Non- Defaulting Bank, the Adjusted Commitment of such Bank at such time and (2) if such Bank is a Defaulting Bank, the Commitment of such Bank at such time.

1.02 Minimum Borrowing Amounts, etc. The aggregate principal amount of each Borrowing shall not be less than the Minimum Borrowing Amount for the Loans


constituting such Borrowing. More than one Borrowing may be incurred on any day, provided that at no time shall there be outstanding more than eight Borrowings of Eurodollar Loans.

1.03 Notice of Borrowing. Whenever the Borrower desires to incur Loans under the Facility, it shall give the Administrative Agent at its Notice Office, prior to 12:00 Noon (New York time), at least three Business Days' prior written notice (or telephonic notice promptly confirmed in writing) of each Borrowing of Eurodollar Loans and at least one Business Day's prior written notice (or telephonic notice promptly confirmed in writing) of each Borrowing of Base Rate Loans to be made hereunder. Each such notice (each a "Notice of Borrowing") shall be in the form of Exhibit A and shall be irrevocable and shall specify (i) the aggregate principal amount of the Loans to be made pursuant to such Borrowing, (ii) the date of Borrowing (which shall be a Business Day) and (iii) whether the respective Borrowing shall consist of Base Rate Loans or (to the extent permitted) Eurodollar Loans and, if Eurodollar Loans, the Interest Period to be initially applicable thereto. The Administrative Agent shall promptly give each Bank written notice (or telephonic notice promptly confirmed in writing) of each proposed Borrowing, of such Bank's proportionate share thereof and of the other matters covered by the Notice of Borrowing.

1.04 Disbursement of Funds. (a) No later than 1:00 P.M. (New York time) on the date specified in each Notice of Borrowing, each Bank will make available its pro rata share of each Borrowing requested to be made on such date in the manner provided below. All such amounts shall be made available to the Administrative Agent in Dollars and immediately available funds at the Payment Office and the Administrative Agent promptly will make available to the Borrower by depositing to its account at the Payment Office the aggregate of the amounts so made available in Dollars and immediately available funds. Unless the Administrative Agent shall have been notified by any Bank prior to the date of Borrowing that such Bank does not intend to make available to the Administrative Agent its portion of the Borrowing or Borrowings to be made on such date, the Administrative Agent may assume that such Bank has made such amount available to the Administrative Agent on such date of Borrowing, and the Administrative Agent, in reliance upon such assumption, may (in its sole discretion and without any obligation to do so) make available to the Borrower a corresponding amount. If such corresponding amount is not in fact made available to the Administrative Agent by such Bank and the Administrative Agent has made available same to the Borrower, the Administrative Agent shall be entitled to recover such corresponding amount from such Bank. If such Bank does not pay such corresponding amount forthwith upon the Administrative Agent's demand therefor, the Administrative Agent shall promptly (and in any event within two Business Days from the date the Administrative Agent made such funds available to the Borrower) notify the Borrower, and the Borrower shall (within two Business Days of receiving such demand) pay such corresponding amount to the Administrative Agent. The Administrative Agent shall also be entitled to recover on demand from such Bank or the Borrower, as the case may be, interest on such corresponding amount

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in respect of each day from the date such corresponding amount was made available by the Administrative Agent to the Borrower to the date such corresponding amount is recovered by the Administrative Agent, at a rate per annum equal to (x) if paid by such Bank, the overnight Federal Funds Effective Rate or (y) if paid by the Borrower, the then applicable rate of interest, calculated in accordance with Section 1.08, for the respective Loans.

(b) Nothing herein shall be deemed to relieve any Bank from its obligation to fulfill its commitments hereunder or to prejudice any rights which the Borrower may have against any Bank as a result of any default by such Bank hereunder.

1.05 Notes. (a) The Borrower's obligation to pay the principal of, and interest on, the Loans made to it by each Bank shall be evidenced by a promissory note substantially in the form of Exhibit B with blanks appropriately completed in conformity herewith (each a "Note" and, collectively, the "Notes").

(b) The Note issued to each Bank shall (i) be executed by the Borrower, (ii) be payable to the order of such Bank and be dated the Effective Date, (iii) be in a stated principal amount equal to the Commitment of such Bank on such date and be payable in the outstanding principal amount of the Loans evidenced thereby, (iv) mature on the Maturity Date, (v) bear interest as provided in the appropriate clause of Section 1.08 in respect of the outstanding Base Rate Loans and Eurodollar Loans, as the case may be, evidenced thereby, (vi) be subject to mandatory repayment as provided in Section 4.02 and
(vii) be entitled to the benefits of this Agreement and the other Credit Documents.

(c) Each Bank will note on its internal records the amount of each Loan made by it and each payment in respect thereof and will, prior to any transfer of any of its Notes, endorse on the reverse side thereof the outstanding principal amount of Loans evidenced thereby. Failure to make any such notation shall not affect the Borrower's obligations in respect of such Loans.

1.06 Conversions. The Borrower shall have the option to convert on any Business Day all or a portion at least equal to the applicable Minimum Borrowing Amount of the outstanding principal amount of the Loans owing pursuant to the Facility into a Borrowing or Borrowings pursuant to the Facility of another Type of Loan, provided that (i) except as otherwise provided in Section 1.10(b), Eurodollar Loans may be converted into Base Rate Loans only on the last day of an Interest Period applicable thereto and no partial conversion of a Borrowing of Eurodollar Loans shall reduce the outstanding principal amount of the Eurodollar Loans made pursuant to such Borrowing to less than the Minimum Borrowing Amount applicable thereto, (ii) no Base Rate Loans may be converted into Eurodollar Loans at any time when a Default or Event of Default is in existence on the date of the conversion if the Administrative Agent or the Required Banks have determined that such a conversion would be disadvantageous to the Banks and (iii) Borrowings of Eurodollar

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Loans resulting from this Section 1.06 shall be limited in number as provided in Section 1.02. Each such conversion shall be effected by the Borrower giving the Administrative Agent at its Notice Office, prior to 12:00 Noon (New York time), at least three Business Days' (or one Business Day's, in the case of a conversion into Base Rate Loans) prior written notice (or telephonic notice promptly confirmed in writing) (each a "Notice of Conversion") specifying the Loans to be so converted, the Type of Loans to be converted into and, if to be converted into a Borrowing of Eurodollar Loans, the Interest Period to be initially applicable thereto. The Administrative Agent shall give prompt notice of any such proposed conversion to each Bank with Loans affected thereby.

1.07 Pro Rata Borrowings. All Loans under this Agreement shall be made by the Banks pro rata on the basis of their Commitments. It is understood that no Bank shall be responsible for any default by any other Bank in its obligation to make Loans hereunder and that each Bank shall be obligated to make the Loans provided to be made by it hereunder, regardless of the failure of any other Bank to fulfill its commitments hereunder.

1.08 Interest. (a) The unpaid principal amount of each Base Rate Loan shall bear interest from the date of the Borrowing thereof until maturity (whether by acceleration or otherwise) at a rate per annum which shall at all times be the Base Rate in effect from time to time.

(b) The unpaid principal amount of each Eurodollar Loan shall bear interest from the date of the Borrowing thereof until maturity (whether by acceleration or otherwise) at a rate per annum which shall at all times be the Eurodollar Rate plus the Applicable Eurodollar Margin.

(c) All overdue principal and, to the extent permitted by law, overdue interest in respect of each Loan and any other overdue amount payable hereunder shall bear interest at a rate per annum equal to 2% per annum in excess of the rate otherwise applicable to such Loans from time to time, with such interest payable on demand, provided that no Loan shall bear interest after maturity (whether by acceleration or otherwise) at a rate per annum less than 2% plus the rate of interest applicable thereto at maturity.

(d) Interest shall accrue from and including the date of any Borrowing to but excluding the date of any repayment thereof and shall be payable (i) in respect of each Base Rate Loan, quarterly in arrears on the first day of each January, April, July and October, (ii) in respect of each Eurodollar Loan, on the last day of each Interest Period applicable thereto and, in the case of an Interest Period of six months, on the date occurring three months after the first day of such Interest Period, (iii) in respect of each Eurodollar Loan, on any prepayment or conversion (on the amount prepaid or converted) and (iv) in respect of each Loan, at maturity (whether by acceleration or otherwise) and, after such maturity, on demand.

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(e) All computations of interest hereunder shall be made in accordance with Section 12.07(b).

(f) The Administrative Agent, upon determining the interest rate for any Borrowing of Eurodollar Loans for any Interest Period, shall promptly notify the Borrower and the Banks thereof.

1.09 Interest Periods. (a) At the time the Borrower gives a Notice of Borrowing or Notice of Conversion in respect of the making of, or conversion into, a Borrowing of Eurodollar Loans (in the case of the initial Interest Period applicable thereto) or prior to 12:00 Noon (New York time) on the third Business Day prior to the expiration of an Interest Period applicable to an outstanding Borrowing of Eurodollar Loans, it shall have the right to elect by giving the Administrative Agent written notice (or telephonic notice promptly confirmed in writing) of the Interest Period applicable to such Borrowing, which Interest Period shall, at the option of the Borrower, be a one, two, three or six month period. Notwithstanding anything to the contrary contained above:

(i) the initial Interest Period for any Borrowing of Eurodollar Loans shall commence on the date of such Borrowing (including the date of any conversion from a Borrowing of Base Rate Loans) and each Interest Period occurring thereafter in respect of such Borrowing shall commence on the day on which the immediately preceding Interest Period expires;

(ii) if any Interest Period begins on a day for which there is no numerically corresponding day in the calendar month at the end of such Interest Period, such Interest Period shall end on the last Business Day of such calendar month;

(iii) if any Interest Period would otherwise expire on a day which is not a Business Day, such Interest Period shall expire on the next succeeding Business Day, provided that if any Interest Period would otherwise expire on a day which is not a Business Day but is a day of the month after which no further Business Day occurs in such month, such Interest Period shall expire on the immediately preceding Business Day;

(iv) no Interest Period shall extend beyond the Maturity Date;

(v) no Interest Period may be elected at any time when a Default or Event of Default is then in existence if the Administrative Agent or the Required Banks have determined that such an election at such time would be disadvantageous to the Banks; and

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(b) If upon the expiration of any Interest Period, the Borrower has failed to (or may not) elect a new Interest Period to be applicable to the respective Borrowing of Eurodollar Loans as provided above, the Borrower shall be deemed to have elected to convert such Borrowing into a Borrowing of Base Rate Loans effective as of the expiration date of such current Interest Period.

1.10 Increased Costs, Illegality, etc. (a) In the event that
(x) in the case of clause (i) below, the Administrative Agent or (y) in the case of clauses (ii) and (iii) below, any Bank shall have determined (which determination shall, absent demonstrable error, be final and conclusive and binding upon all parties hereto):

(i) on any date for determining the Eurodollar Rate for any Interest Period that, by reason of any changes arising after the date of this Agreement affecting the interbank Eurodollar market, adequate and fair means do not exist for ascertaining the applicable interest rate on the basis provided for in the definition of Eurodollar Rate; or

(ii) at any time, that such Bank shall incur actual increased costs or reductions in the amounts received or receivable hereunder with respect to any Eurodollar Loans (other than any increased cost or reduction in the amount received or receivable resulting from the imposition of or a change in the rate or basis of taxes or similar charges) because of (x) any change since the date of this Agreement in any applicable law, governmental rule, regulation, guideline or order (or in the interpretation or administration thereof and including the introduction of any new law or governmental rule, regulation, guideline or order) (such as, for example, but not limited to, a change in official reserve requirements, but, in all events, excluding reserves required under Regulation D to the extent included in the computation of the Eurodollar Rate) and/or (y) other circumstances occurring after the date of this Agreement and affecting the interbank Eurodollar market; or

(iii) at any time, that the making or continuance of any Eurodollar Loan has become unlawful by compliance by such Bank in good faith with any law, governmental rule, regulation, guideline (or would conflict with any such governmental rule, regulation, guideline or order not having the force of law but with which such Bank customarily complies even though the failure to comply therewith would not be unlawful);

then, and in any such event, such Bank (or the Administrative Agent in the case of clause (i) above) shall (x) on such date and (y) within ten Business Days of the date on which such event no longer exists, give notice (by telephone confirmed in writing) to the Borrower and to the Administrative Agent of such determination (which notice the Administrative Agent shall promptly transmit to each of the other Banks). Thereafter (x) in the case of clause (i)

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above, Eurodollar Loans shall no longer be available until such time as the Administrative Agent notifies the Borrower and the Banks that the circumstances giving rise to such notice by the Administrative Agent no longer exist, and any Notice of Borrowing or Notice of Conversion given by the Borrower with respect to Eurodollar Loans which have not yet been incurred shall be deemed rescinded by the Borrower, (y) in the case of clause (ii) above, the Borrower shall, subject to Section 1.12(b) (to the extent applicable), pay to such Bank, upon written demand therefor, such additional amounts (in the form of an increased rate of, or a different method of calculating, interest or otherwise as such Bank in its sole discretion shall determine) as shall be required to compensate such Bank for such increased costs or reductions in amounts receivable hereunder (a written notice as to the additional amounts owed to such Bank, showing the basis for the calculation thereof, submitted to the Borrower by such Bank shall, absent demonstrable error, be final and conclusive and binding upon all parties hereto) and (z) in the case of clause (iii) above, the Borrower shall take one of the actions specified in Section 1.10(b) as promptly as possible and, in any event, within the time period required by law.

(b) At any time that any Eurodollar Loan is affected by the circumstances described in Section 1.10(a)(ii) or (iii), the Borrower may (and in the case of a Eurodollar Loan affected pursuant to Section 1.10(a)(iii), the Borrower shall) either (i) if the affected Eurodollar Loan is then being made pursuant to a Borrowing, cancel said Borrowing by giving the Administrative Agent telephonic notice (confirmed promptly in writing) thereof on the same date that the Borrower was notified by a Bank pursuant to Section 1.10(a)(ii) or (iii), or (ii) if the affected Eurodollar Loan is then outstanding, upon at least three Business Days' notice to the Administrative Agent, require the affected Bank to convert each such Eurodollar Loan into a Base Rate Loan, provided that if more than one Bank is affected at any time, then all affected Banks must be treated the same pursuant to this Section 1.10(b).

(c) If any Bank shall have determined that after the date of this Agreement, the adoption or effectiveness of any applicable law, rule or regulation regarding capital adequacy, or any change therein, or any change in the interpretation or administration thereof by any governmental authority, central bank or comparable agency charged with the interpretation or administration thereof, or compliance by such Bank with any request or directive regarding capital adequacy (whether or not having the force of law but with which such Bank customarily complies even though the failure to comply therewith would not be unlawful) of any such authority, central bank or comparable agency, has or would have the effect of reducing the rate of return on such Bank's capital or assets as a consequence of its commitments or obligations hereunder to a level below that which such Bank could have achieved but for such adoption, effectiveness, change or compliance (taking into consideration such Bank's policies with respect to capital adequacy), then from time to time, within 15 days after demand by such Bank (with a copy to the Administrative Agent), the Borrower shall, subject to Section 1.12(b) (to the extent applicable), pay to such Bank such additional amount or amounts as will compensate such Bank for such reduction. Each Bank, upon

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determining in good faith that any additional amounts will be payable pursuant to this Section 1.10(c), will give prompt written notice thereof to the Borrower, which notice shall set forth the basis of the calculation of such additional amounts, although the failure to give any such notice shall not release or diminish any of the Borrower's obligations to pay additional amounts pursuant to this Section 1.10(c) upon the subsequent receipt of such notice.

1.11 Compensation. The Borrower shall compensate each Bank, upon its written request (which request shall set forth the basis for requesting such compensation), for all reasonable losses, expenses and liabilities (including, without limitation, any loss, expense or liability incurred by reason of the liquidation or reemployment of deposits or other funds required by such Bank to fund its Eurodollar Loans but excluding in any event the loss of anticipated profits) which such Bank may sustain: (i) if for any reason (other than a default by such Bank or the Administrative Agent) a Borrowing of Eurodollar Loans does not occur on a date specified therefor in a Notice of Borrowing or Notice of Conversion (whether or not withdrawn by the Borrower or deemed withdrawn pursuant to Section 1.10(a)); (ii) if any prepayment, repayment or conversion of any of its Eurodollar Loans occurs on a date which is not the last day of an Interest Period applicable thereto; (iii) if any prepayment of any of its Eurodollar Loans is not made on any date specified in a notice of prepayment given by the Borrower; or (iv) as a consequence of (x) any other default by the Borrower to repay its Eurodollar Loans when required by the terms of this Agreement or (y) an election made pursuant to Section 1.10(b).

1.12 Change of Lending Office; Limitation on Indemnities. (a) Each Bank agrees that, upon the occurrence of any event giving rise to the operation of Section 1.10(a)(ii) or (iii), 1.10(c), 2.06 or 4.04 with respect to such Bank, it will, if requested by the Borrower, use reasonable efforts (subject to overall policy considerations of such Bank) to designate another lending office for any Loan, Letters of Credit or Commitments affected by such event, provided that such designation is made on such terms that such Bank and its lending office suffer no economic, legal or regulatory disadvantage, with the object of avoiding the consequence of the event giving rise to the operation of any such Section. Nothing in this Section 1.12 shall affect or postpone any of the obligations of the Borrower or the right of any Bank provided in Section 1.10, 2.06 or 4.04.

(b) Notwithstanding anything in this Agreement to the contrary, to the extent any notice required by Section 1.10, 2.06 or 4.04 is given by any Bank more than 180 days after such Bank obtained, or reasonably should have obtained, knowledge of the occurrence of the event giving rise to the additional costs of the type described in such Section, such Bank shall not be entitled to compensation under Section 1.10, 2.06 or 4.04 for any amounts incurred or accruing prior to the giving of such notice to the Borrower.

1.13 Replacement of Banks. (x) Upon the occurrence of any event giving rise to the operation of Section 1.10(a)(ii) or (iii), Section 1.10(c), Section 2.06 or Section

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4.04 with respect to any Bank which results in such Bank charging to the Borrower increased costs in excess of those being generally charged by the other Banks or becoming incapable of making Eurodollar Loans, (y) if a Bank becomes a Defaulting Bank and/or (z) as provided in Section 12.12(b), in the case of a refusal by a Bank to consent to a proposed change, waiver, discharge or termination with respect to this Agreement which has been approved by the Required Banks, the Borrower shall have the right, if no Default or Event of Default then exists, to replace such Bank (the "Replaced Bank") with one or more other Eligible Transferee or Transferees reasonably acceptable to the Administrative Agent, none of which Transferees shall constitute a Defaulting Bank at the time of such replacement (collectively, the "Replacement Bank"), provided that (i) at the time of any replacement pursuant to this Section 1.13, the Replacement Bank shall enter into one or more Assignment and Assumption Agreements pursuant to Section 12.04(b) (and with all fees payable pursuant to said Section 12.04(b) to be paid by the Replacement Bank) pursuant to which the Replacement Bank shall acquire all of the Commitments and outstanding Loans of, and in each case participations in Letters of Credit by, the Replaced Bank and, in connection therewith, shall pay to (x) the Replaced Bank in respect thereof an amount equal to the sum of (A) an amount equal to the principal of, and all accrued interest on, all outstanding Loans of the Replaced Bank, (B) an amount equal to all Unpaid Drawings that have been funded by (and not reimbursed to) such Replaced Bank, together with all then unpaid interest with respect thereto at such time and (C) an amount equal to all accrued, but theretofore unpaid, Fees owing to the Replaced Bank pursuant to Section 3.01, and (y) the Letter of Credit Issuer an amount equal to such Replaced Bank's Percentage of any Unpaid Drawing (which at such time remains an Unpaid Drawing) to the extent such amount was not theretofore funded by such Replaced Bank, and (ii) all obligations of the Borrower owing to the Replaced Bank (other than those specifically described in clause (i) above in respect of which the assignment purchase price has been, or is concurrently being, paid) shall be paid in full to such Replaced Bank concurrently with such replacement. Upon the execution of the respective Assignment and Assumption Agreements, the payment of amounts referred to in clauses (i) and (ii) above and, if so requested by the Replacement Bank, delivery to the Replacement Bank of a Note executed by the Borrower, the Replacement Bank shall become a Bank hereunder and the Replaced Bank shall cease to constitute a Bank hereunder, except with respect to indemnification provisions applicable to the Replaced Bank under this Agreement, which shall survive as to such Replaced Bank.

SECTION 2. Letters of Credit.

2.01 Letters of Credit. (a) Subject to and upon the terms and conditions herein set forth, the Borrower may request the Letter of Credit Issuer to issue, at any time and from time to time on and after the Effective Date and prior to the Maturity Date, and subject to and upon the terms and conditions herein set forth, the Letter of Credit Issuer agrees to issue from time to time, (x) for the account of the Borrower and for the benefit of any holder (or any trustee, agent or other similar representative for any such holders) of L/C

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Supportable Obligations of the Borrower or any of its Subsidiaries, an irrevocable standby letter of credit, in a form customarily used by the Letter of Credit Issuer or in such other form as has been approved by the Letter of Credit Issuer (each such standby letter of credit, a "Standby Letter of Credit") in support of such L/C Supportable Obligations and/or (y) for the account of the Borrower and for the benefit of sellers of goods or materials to the Borrower or any of its Subsidiaries, an irrevocable sight documentary letter of credit in a form customarily used by the Letter of Credit Issuer or in such other form as has been approved by the Letter of Credit Issuer (each such documentary letter of credit, a "Trade Letter of Credit", and each such Trade Letter of Credit and each Standby Letter of Credit, a "Letter of Credit") in support of commercial transactions of the Borrower and its Subsidiaries.

(b) Notwithstanding the foregoing, (i) no Letter of Credit shall be issued, the Stated Amount of which, when added to the Letter of Credit Outstandings (exclusive of Unpaid Drawings which are repaid on the date of, and prior to the issuance of, the respective Letter of Credit) at such time, would exceed either (x) $40,000,000 or (y) when added to the aggregate principal amount of all Loans made by Non-Defaulting Banks then outstanding, the Adjusted Total Commitment at such time; and (ii) each Letter of Credit shall have an expiry date occurring not later than three years after such Letter of Credit's date of issuance although any Letter of Credit may be extendable for successive periods of up to 12 months, but not beyond the Business Day next preceding the Maturity Date, on terms acceptable to the Letter of Credit Issuer and in no event shall any Letter of Credit have an expiry date occurring later than the Business Day immediately preceding the Maturity Date.

2.02 Minimum Stated Amount. The initial Stated Amount of each Letter of Credit shall be not less than $50,000 or such lesser amount reasonably acceptable to the Letter of Credit Issuer.

2.03 Letter of Credit Requests; Request for Issuance of Letter of Credit. (a) Whenever it desires that a Letter of Credit be issued, the Borrower shall give the Administrative Agent and the Letter of Credit Issuer written notice (including by way of telecopier) in the form of Exhibit C prior to 2:00 P.M. (New York time) at least three Business Days (or such shorter period as may be acceptable to the Letter of Credit Issuer) prior to the proposed date of issuance (which shall be a Business Day) (each a "Letter of Credit Request"), which Letter of Credit Request shall include any documents that the Letter of Credit Issuer customarily requires in connection therewith. The Administrative Agent shall promptly notify each Bank of each Letter of Credit Request.

(b) The Letter of Credit Issuer shall, on the date of each issuance of a Letter of Credit by it, give each Bank and the Borrower written notice of the issuance of such Letter of Credit.

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2.04 Agreement to Repay Letter of Credit Payments. (a) The Borrower hereby agrees to reimburse the Letter of Credit Issuer, by making payment to the Administrative Agent at the Payment Office, for any payment or disbursement made by the Letter of Credit Issuer under any Letter of Credit
(each such amount so paid or disbursed until reimbursed, an "Unpaid Drawing") promptly on the date on which the Borrower is notified by the Letter of Credit Issuer of such payment or disbursement, with interest on the amount so paid or disbursed by the Letter of Credit Issuer, to the extent not reimbursed prior to 1:00 P.M. (New York time) on the date of such payment or disbursement, from and including the date paid or disbursed to but not including the date the Letter of Credit Issuer is reimbursed therefor at a rate per annum which shall be the Base Rate as in effect from time to time (plus an additional 2% per annum if not reimbursed by the third Business Day after the date of such notice of payment or disbursement), such interest also to be payable on demand.

(b) The Borrower's obligation under this Section 2.04 to reimburse the Letter of Credit Issuer with respect to Unpaid Drawings (including, in each case, interest thereon) shall be absolute and unconditional under any and all circumstances and irrespective of any setoff, counterclaim or defense to payment which the Borrower may have or have had against the Letter of Credit Issuer, the Administrative Agent or any Bank, including, without limitation, any defense based upon the failure of any drawing under a Letter of Credit to conform to the terms of the Letter of Credit (other than the failure of the Letter of Credit Issuer to determine that any documents required to be delivered under such Letter of Credit have been delivered and that they substantially comply on their face with the requirements of the Letter of Credit) or any non-application or misapplication by the beneficiary of the proceeds of such drawing; provided, however, that the Borrower shall not be obligated to reimburse the Letter of Credit Issuer for any wrongful payment made by the Letter of Credit Issuer under a Letter of Credit as a result of acts or omissions constituting willful misconduct or gross negligence on the part of the Letter of Credit Issuer.

2.05 Letter of Credit Participations. (a) Immediately upon the issuance by the Letter of Credit Issuer of any Letter of Credit, the Letter of Credit Issuer shall be deemed to have sold and transferred to each other Bank, and each such Bank (each a "Participant") shall be deemed irrevocably and unconditionally to have purchased and received from the Letter of Credit Issuer, without recourse or warranty, an undivided interest and participation, to the extent of such Bank's Adjusted Percentage, in such Letter of Credit, each substitute letter of credit, each drawing made thereunder and the obligations of the Borrower under this Agreement with respect thereto (although the Letter of Credit Fee shall be payable directly to the Administrative Agent for the account of the Banks as provided in Section 3.01(b) and the Participants shall have no right to receive any portion of any Facing Fees) and any security therefor or guaranty pertaining thereto. Upon any change in the Commitments or Adjusted Percentages of the Banks pursuant to Section 12.04(b) or upon a Bank Default, it is hereby agreed that, with respect to all outstanding Letters of Credit and Unpaid Drawings,

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there shall be an automatic adjustment to the participations pursuant to this
Section 2.05 to reflect the new Adjusted Percentages of the assigning and assignee Bank or of all Banks, as the case may be.

(b) In determining whether to pay under any Letter of Credit, the Letter of Credit Issuer shall not have any obligation relative to the Participants other than to determine that any documents required to be delivered under such Letter of Credit have been delivered and that they substantially comply on their face with the requirements of such Letter of Credit. Any action taken or omitted to be taken by the Letter of Credit Issuer under or in connection with any Letter of Credit, if taken or omitted in the absence of gross negligence or willful misconduct, shall not create for the Letter of Credit Issuer any resulting liability to the Participants.

(c) In the event that the Letter of Credit Issuer makes any payment under any Letter of Credit and the Borrower shall not have reimbursed such amount in full to the Letter of Credit Issuer pursuant to Section 2.04(a), the Letter of Credit Issuer shall promptly notify the Administrative Agent, and the Administrative Agent shall promptly notify each Participant of such failure, and each Participant shall promptly and unconditionally pay to the Administrative Agent for the account of the Letter of Credit Issuer, the amount of such Participant's Adjusted Percentage of such payment in Dollars and in same day funds; provided, however, that no Participant shall be obligated to pay to the Administrative Agent its Adjusted Percentage of such unreimbursed amount for any wrongful payment made by the Letter of Credit Issuer under a Letter of Credit as a result of acts or omissions constituting willful misconduct or gross negligence on the part of the Letter of Credit Issuer. If the Administrative Agent so notifies any Participant required to fund an Unpaid Drawing under a Letter of Credit prior to 12:00 Noon (New York time) on any Business Day, such Participant shall make available to the Administrative Agent for the account of the Letter of Credit Issuer such Participant's Adjusted Percentage of the amount of such payment on such Business Day in same day funds. If and to the extent such Participant shall not have so made its Adjusted Percentage of the amount of such Unpaid Drawing available to the Administrative Agent for the account of the Letter of Credit Issuer, such Participant agrees to pay to the Administrative Agent for the account of the Letter of Credit Issuer, forthwith on demand such amount, together with interest thereon, for each day from such date until the date such amount is paid to the Administrative Agent for the account of the Letter of Credit Issuer at the overnight Federal Funds Effective Rate. The failure of any Participant to make available to the Administrative Agent for the account of the Letter of Credit Issuer its Adjusted Percentage of any Unpaid Drawing under any Letter of Credit shall not relieve any other Participant of its obligation hereunder to make available to the Administrative Agent for the account of the Letter of Credit Issuer its Adjusted Percentage of any payment under any Letter of Credit on the date required, as specified above, but no Participant shall be responsible for the failure of any other Participant to make available to the Administrative

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Agent for the account of the Letter of Credit Issuer such other Participant's Adjusted Percentage of any such payment.

(d) Whenever the Letter of Credit Issuer receives a payment of a reimbursement obligation as to which the Administrative Agent has received for the account of the Letter of Credit Issuer any payments from the Participants pursuant to clause (c) above, the Letter of Credit Issuer shall pay to the Administrative Agent and the Administrative Agent shall promptly pay to each Participant which has paid its Adjusted Percentage thereof, in Dollars and in same day funds, an amount equal to such Participant's Adjusted Percentage of the principal amount thereof and interest thereon accruing at the overnight Federal Funds Effective Rate after the purchase of the respective participations.

(e) The obligations of the Participants to make payments to the Administrative Agent for the account of the Letter of Credit Issuer with respect to Letters of Credit shall be irrevocable and not subject to counterclaim, set-off or other defense or any other qualification or exception whatsoever (provided that no Participant shall be required to make payments resulting from the Letter of Credit Issuer's gross negligence or willful misconduct) and shall be made in accordance with the terms and conditions of this Agreement under all circumstances, including, without limitation, any of the following circumstances:

(i) any lack of validity or enforceability of this Agreement or any of the other Credit Documents;

(ii) the existence of any claim, set-off, defense or other right which the Borrower may have at any time against a beneficiary named in a Letter of Credit, any transferee of any Letter of Credit (or any Person for whom any such transferee may be acting), the Administrative Agent, the Letter of Credit Issuer, any Bank or other Person, whether in connection with this Agreement, any Letter of Credit, the transactions contemplated herein or any unrelated transactions (including any underlying transaction between the Borrower and the beneficiary named in any such Letter of Credit);

(iii) any draft, certificate or other document presented under the Letter of Credit proving to be forged, fraudulent, or invalid in any respect or any statement therein being untrue or inaccurate in any respect;

(iv) the surrender or impairment of any security for the performance or observance of any of the terms of any of the Credit Documents; or

(v) the occurrence of any Default or Event of Default.

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2.06 Increased Costs. If at any time after the date of the Agreement, the adoption or effectiveness of any applicable law, rule or regulation, or any change therein, or any change in the interpretation or administration thereof by any governmental authority, central bank or comparable agency charged with the interpretation or administration thereof, or compliance by the Letter of Credit Issuer or any Bank with any request or directive (whether or not having the force of law but with which such Bank customarily complies even though the failure to comply therewith would not be unlawful) by any such authority, central bank or comparable agency shall either
(i) impose, modify or make applicable any reserve, deposit, capital adequacy or similar requirement against Letters of Credit issued by the Letter of Credit Issuer or such Bank's participation therein, or (ii) shall impose on the Letter of Credit Issuer or any Bank any other conditions affecting this Agreement, any Letter of Credit or such Bank's participation therein; and the result of any of the foregoing is to increase the cost to the Letter of Credit Issuer or such Bank of issuing, maintaining or participating in any Letter of Credit, or to reduce the amount of any sum received or receivable by the Letter of Credit Issuer or such Bank hereunder (other than any increased cost or reduction in the amount received or receivable resulting from the imposition of or a change in the rate or basis of taxes or similar charges), then, upon demand to the Borrower by the Letter of Credit Issuer or such Bank (a copy of which notice shall be sent by the Letter of Credit Issuer or such Bank to the Administrative Agent), the Borrower shall, subject to Section 1.12(b) (to the extent applicable), pay to the Letter of Credit Issuer or such Bank such additional amount or amounts as will compensate the Letter of Credit Issuer or such Bank for such increased cost or reduction. A certificate submitted to the Borrower by the Letter of Credit Issuer or such Bank, as the case may be (a copy of which certificate shall be sent by the Letter of Credit Issuer or such Bank to the Administrative Agent), setting forth the basis for the determination of such additional amount or amounts necessary to compensate the Letter of Credit Issuer or such Bank as aforesaid shall be conclusive and binding on the Borrower absent demonstrable error, although the failure to deliver any such certificate shall not release or diminish any of the Borrower's obligations to pay additional amounts pursuant to this Section 2.06 upon the subsequent receipt thereof.

2.07 Indemnities. The Borrower hereby agrees to reimburse and indemnify the Letter of Credit Issuer for and against any and all liabilities, obligations, losses, damages, penalties, claims, actions, judgments, suits, costs, expenses or disbursements of whatsoever kind or nature which may be imposed on, asserted against or incurred by the Letter of Credit Issuer in performing its respective duties in any way relating to or arising out of its issuance of Letters of Credit; provided that the Borrower shall not be liable for any portion of such liabilities, obligations, losses, damages, penalties, actions, judgments, suits, costs, expenses or disbursements resulting from the Letter of Credit Issuer's gross negligence or willful misconduct. To the extent the Letter of Credit Issuer is not indemnified by the Borrower, the Participants will reimburse and indemnify the Letter of Credit Issuer, in proportion to their respective "percentages" of the Total Commitment, for and against any and all liabilities, obligations, losses, damages, penalties, claims, actions, judgments, suits, costs,

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expenses or disbursements of whatsoever kind or nature which may be imposed on, asserted against or incurred by the Letter of Credit Issuer in performing its respective duties in any way relating to or arising out of its issuance of Letters of Credit; provided that no Participants shall be liable for any portion of such liabilities, obligations, losses, damages, penalties, actions, judgments, suits, costs, expenses or disbursements resulting from the Letter of Credit Issuer's gross negligence or willful misconduct.

SECTION 3. Fees; Commitments.

3.01 Fees. (a) The Borrower agrees to pay to the Administrative Agent a commitment commission ("Commitment Commission") pro rata for the account of each Non-Defaulting Bank for the period from and including the Effective Date to, but not including, the date the Total Commitment has been terminated, which Commitment Commission shall be equal to the Applicable Commitment Commission Percentage, computed at such rate for each day, on the daily amount of such Bank's Available Unutilized Commitment. Such Commitment Commission shall be due and payable in arrears on the first day of each January, April, July and October and on the date upon which the Total Commitment is terminated.

(b) The Borrower agrees to pay to the Administrative Agent for the account of the Non-Defaulting Banks pro rata on the basis of their respective Adjusted Percentages, a fee in respect of each Letter of Credit (the "Letter of Credit Fee") computed at a rate per annum equal to the Applicable Eurodollar Margin then in effect on the daily Stated Amount of such Letter of Credit. Accrued Letter of Credit Fees shall be due and payable quarterly in arrears on the first day of each January, April, July and October of each year and on the date after the Total Commitment is terminated and no Letters of Credit remain outstanding.

(c) The Borrower agrees to pay to the Administrative Agent for the account of the Letter of Credit Issuer a fee in respect of each Letter of Credit issued by it (the "Facing Fee") computed at the rate of 1/10 of 1% per annum on the daily Stated Amount of such Letter of Credit, provided that in no event shall the annual Facing Fee to the Letter of Credit Issuer be less than $500. Accrued Facing Fees shall be due and payable quarterly in arrears on the first day of each January, April, July and October of each year and on the date after the Total Commitment is terminated and no Letters of Credit remain outstanding.

(d) The Borrower agrees to pay directly to the Letter of Credit Issuer upon each issuance of, payment under, and/or amendment of, a Letter of Credit issued by it such amount as shall have been agreed to between the Borrower and the Letter of Credit Issuer.

(e) The Borrower shall pay to the Administrative Agent (x) on the Effective Date for its own account and/or for distribution to the Banks such Fees as heretofore agreed in writing by the Borrower and the Administrative Agent and (y) for its own account such

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other fees as agreed to in writing between the Borrower and the Administrative Agent, when and as due.

(f) All computations of Fees shall be made in accordance with
Section 12.07(b).

3.02 Voluntary Reduction of Commitments. Upon at least three Business Days' prior written notice (or telephonic notice confirmed in writing) to the Administrative Agent at its Notice Office (which notice the Administrative Agent shall promptly transmit to each of the Banks), the Borrower shall have the right, without premium or penalty, to terminate or partially reduce the Total Unutilized Commitment, provided that (w) any such termination shall apply to proportionately and permanently reduce the Commitment of each Bank, (x) no such reduction shall reduce any Non-Defaulting Bank's Commitment to an amount that is less than the sum of (A) the outstanding Loans of such Bank plus (B) such Bank's Adjusted Percentage of Letter of Credit Outstandings and (y) any partial reduction pursuant to this Section 3.02 shall be in the amount of at least $500,000 or integral multiples of $100,000 in excess thereof.

3.03 Mandatory Adjustments of Commitments, etc. (a) The Total Commitment shall terminate on the earlier of (i) the Maturity Date and (ii) unless the Required Banks otherwise consent, the date on which any Change of Control occurs.

(b) In addition to any other mandatory commitment reductions pursuant to this Section 3.03, on the Business Day following the date of receipt thereof by the Borrower and/or any of its Subsidiaries of the Cash Proceeds and/or other consideration from any Fleet Rig Disposition, the Total Commitment shall be permanently reduced by an amount equal to 30% of the combined fair market value of the Net Cash Proceeds and other consideration arising from such Fleet Rig Disposition; provided that to the extent such proceeds are (i) reinvested within six months of such Fleet Rig Disposition in replacement assets owned by the Borrower or its Subsidiaries and/or (ii) applied within six months of such Fleet Rig Disposition to permanently reduce the outstanding principal balance under the Borrower's 9-1/8% Senior Notes and/or 9-1/4% Senior Notes, such proceeds shall not be required to be so applied to reduce the Total Commitment on such date.

(c) Each reduction of the Total Commitment pursuant to this
Section 3.03 shall apply proportionately to the Commitment of each Bank.

SECTION 4. Payments.

4.01 Voluntary Prepayments. The Borrower shall have the right to prepay Loans in whole or in part, without premium or penalty, from time to time on the following terms and conditions: (i) the Borrower shall give the Administrative Agent at the Payment

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Office written notice (or telephonic notice promptly confirmed in writing) of its intent to prepay the Loans, the amount of such prepayment and (in the case of Eurodollar Loans) the specific Borrowing or Borrowings pursuant to which made, which notice shall be given by the Borrower at least one Business Day prior to the date of such prepayment with respect to Base Rate Loans and five Business Days prior to the date of such prepayment with respect to Eurodollar Loans, which notice shall promptly be transmitted by the Administrative Agent to each of the Banks; (ii) each partial prepayment of any Borrowing shall be in an aggregate principal amount of at least $500,000 and, if greater in an integral multiple of $100,000, provided that no partial prepayment of Eurodollar Loans made pursuant to a Borrowing shall reduce the aggregate principal amount of the Loans outstanding pursuant to such Borrowing to an amount less than the Minimum Borrowing Amount applicable thereto; (iii) Eurodollar Loans may only be prepaid pursuant to this Section 4.01 on the last day of the Interest Period applicable thereto, unless prior prepayment is accompanied by all breakage costs owing pursuant to Section 1.11 in connection therewith; and (iv) each prepayment in respect of any Loans made pursuant to a Borrowing shall be applied pro rata among the Banks which made such Loans, provided that at the Borrower's election in connection with any prepayment of Loans pursuant to this Section 4.01, such prepayment shall not be applied to any Loans of a Defaulting Bank.

4.02 Mandatory Prepayments.

(A) Requirements:

(a) (i) If on any date the sum of the aggregate outstanding principal amount of Loans made by Non-Defaulting Banks (other than amounts made available by the Administrative Agent, on behalf of another Bank, pursuant to
Section 1.04(a) for which the Administrative Agent does not receive reimbursement due from such Bank, with repayment of such amounts to be governed by the provisions of Section 1.04(a) until the third Business Day after the failure of such Bank or the Borrower to repay such amount, whereupon such amounts shall be included in calculations made pursuant to this Section 4.02(A)(a)(i)) and the Letter of Credit Outstandings exceeds the Adjusted Total Commitment as then in effect, the Borrower shall repay on such date the principal of Loans of Non-Defaulting Banks, in an aggregate amount equal to such excess. If, after giving effect to the repayment of all outstanding Loans of Non-Defaulting Banks, the aggregate amount of Letter of Credit Outstandings exceeds the Adjusted Total Commitment then in effect, the Borrower shall pay to the Administrative Agent an amount in cash and/or Cash Equivalents equal to such excess (up to the aggregate amount of the Letter of Credit Outstandings at such time) and the Administrative Agent shall hold such payment as security for the obligations of the Borrower hereunder pursuant to a cash collateral agreement to be entered into in form and substance reasonably satisfactory to the Administrative Agent (which shall permit certain investments in Cash Equivalents satisfactory to the Administrative Agent, until the proceeds are applied to the secured obligations).

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(ii) If on any date the aggregate outstanding principal amount of the Loans made by a Defaulting Bank exceeds the Commitment of such Defaulting Bank, the Borrower shall repay the principal of Loans of such Defaulting Bank in an amount equal to such excess.

(b) Notwithstanding anything to the contrary contained elsewhere in this Agreement, all then outstanding Loans shall be repaid in full on the Maturity Date.

(c) On the date on which any Change of Control occurs, unless otherwise agreed by the Required Banks, the outstanding principal amount of the Loans, if any, shall become due and payable in full.

(B) Application:

With respect to each prepayment of Loans required by Section 4.02, the Borrower may designate the Types of Loans which are to be prepaid and the specific Borrowing or Borrowings under the Facility pursuant to which made, provided that (i) Eurodollar Loans may only be repaid if no Base Rate Loans of Non-Defaulting Banks remain outstanding; (ii) if any prepayment of Eurodollar Loans made pursuant to a single Borrowing shall reduce the outstanding Loans made pursuant to such Borrowing to an amount less than the Minimum Borrowing Amount for such Borrowing, such Borrowing shall be immediately converted into Base Rate Loans; and (iii) each prepayment of any Loans made by Non-Defaulting Banks pursuant to a Borrowing shall be applied pro rata among the Non- Defaulting Banks which made such Loans. In the absence of a designation by the Borrower as described in the preceding sentence, the Administrative Agent shall, subject to the above, make such designation in its sole discretion with a view, but no obligation, to minimize breakage costs owing under Section 1.11. Notwithstanding the foregoing provisions of this Section 4.02(B), if at any time the mandatory prepayment of Loans pursuant to Section 4.02(A) above would result, after giving effect to the procedures set forth above, in the Borrower incurring breakage costs under Section 1.11 as a result of Eurodollar Loans being prepaid other than on the last day of an Interest Period applicable thereto (the "Affected Eurodollar Loans"), then the Borrower may in its sole discretion initially deposit a portion (up to 100%) of the amounts that otherwise would have been paid in respect of the Affected Eurodollar Loans with the Administrative Agent (which deposit must be equal in amount to the amount of the Affected Eurodollar Loans not immediately prepaid) to be held as security for the obligations of the Borrower hereunder pursuant to a cash collateral agreement to be entered into in form and substance reasonably satisfactory to the Administrative Agent and shall provide for investments satisfactory to the Administrative Agent and the Borrower, with such cash collateral to be directly applied upon the first occurrence (or occurrences) thereafter of the last day of an Interest Period applicable to the relevant Loans that are Eurodollar Loans (or such earlier date or dates as shall be requested by the Borrower), to repay an aggregate principal amount of such Loans equal to the Affected Eurodollar Loans not initially prepaid pursuant to this sentence. Notwithstanding anything to the contrary

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contained in the immediately preceding sentence, all amounts deposited as cash collateral pursuant to the immediately preceding sentence shall be held for the sole benefit of the Banks whose Loans would otherwise have been immediately prepaid with the amounts deposited and upon the taking of any action by the Administrative Agent or the Banks pursuant to the remedial provisions of
Section 9, any amounts held as cash collateral pursuant to this Section 4.02(B) shall, subject to the requirements of applicable law, be immediately applied to the Loans.

4.03 Method and Place of Payment. Except as otherwise specifically provided herein, all payments under this Agreement shall be made to the Administrative Agent for the ratable (based on its pro rata share) account of the Banks entitled thereto, not later than 1:00 P.M. (New York time) on the date when due and shall be made in immediately available funds and in lawful money of the United States of America at the Payment Office, it being understood that written notice by the Borrower to the Administrative Agent to make a payment from the funds in the Borrower's account at the Payment Office shall constitute the making of such payment to the extent of such funds held in such account. Any payments under this Agreement which are made later than 1:00 P.M. (New York time) shall be deemed to have been made on the next succeeding Business Day. Whenever any payment to be made hereunder shall be stated to be due on a day which is not a Business Day, the due date thereof shall be extended to the next succeeding Business Day and, with respect to payments of principal, interest shall be payable during such extension at the applicable rate in effect immediately prior to such extension.

4.04 Net Payments. (a) All payments made by the Borrower hereunder or under any Note will be made without setoff, counterclaim or other defense. Except as provided in Section 4.04(b), all such payments will be made free and clear of, and without deduction or withholding for, any present or future taxes, levies, imposts, duties, fees, assessments or other charges of whatever nature now or hereafter imposed by any jurisdiction or by any political subdivision or taxing authority thereof or therein with respect to such payments (but excluding, except as provided in the second succeeding sentence, any tax imposed on or measured by the net income or net profits of a Bank pursuant to the laws of the jurisdiction in which it is organized or managed and controlled or the jurisdiction in which the principal office or applicable lending office of such Bank is located or any subdivision thereof or therein) and all interest, penalties or similar liabilities with respect thereto (all such non-excluded taxes, levies, imposts, duties, fees, assessments or other charges being referred to collectively as "Taxes"). If any Taxes are so levied or imposed, the Borrower agrees to pay the full amount of such Taxes, and such additional amounts, if any, as may be necessary so that every payment of all amounts due under this Agreement or under any Note, after withholding or deduction for or on account of any Taxes, will not be less than the amount provided for herein or in such Note. If any amounts are payable in respect of Taxes pursuant to the preceding sentence, the Borrower agrees to reimburse each Bank, upon the written request of such Bank, for taxes imposed on or measured by the net income or net

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profits of such Bank pursuant to the laws of the jurisdiction in which the principal office or applicable lending office of such Bank is located or under the laws of any political subdivision or taxing authority of any such jurisdiction in which the principal office or applicable lending office of such Bank is located and for any withholding of taxes as such Bank shall determine are payable by, or withheld from, such Bank in respect of such amounts so paid to or on behalf of such Bank pursuant to the preceding sentence and in respect of any amounts paid to or on behalf of such Bank pursuant to this sentence. The Borrower will furnish to the Administrative Agent within 45 days after the date the payment of any Taxes is due pursuant to applicable law certified copies of tax receipts evidencing such payment by the Borrower. The Borrower agrees to indemnify and hold harmless each Bank, and reimburse such Bank upon its written request, for the amount of any Taxes so levied or imposed and paid by such Bank.

(b) Each Bank that is not a United States person (as such term is defined in Section 7701(a)(30) of the Code) agrees to deliver to the Borrower and the Administrative Agent on or prior to the date of this Agreement, or in the case of a Bank that is an assignee or transferee of an interest under this Agreement pursuant to Section 1.13 or 12.04 (unless the respective Bank was already a Bank hereunder immediately prior to such assignment or transfer), on the date of such assignment or transfer to such Bank, (i) two accurate and complete original signed copies of Internal Revenue Service Form 4224 or 1001 (or successor forms) certifying to such Bank's entitlement to a complete exemption from United States withholding tax with respect to payments to be made under this Agreement and under any Note, or (ii) if the Bank is not a "bank" within the meaning of Section 881(c)(3)(A) of the Code and cannot deliver either Internal Revenue Service Form 1001 or 4224 pursuant to clause (i) above, (x) a certificate substantially in the form of Exhibit D (any such certificate, a "Section 4.04(b)(ii) Certificate") and (y) two accurate and complete original signed copies of Internal Revenue Service Form W-8 (or successor form) certifying to such Bank's entitlement to a complete exemption from United States withholding tax with respect to payments of interest to be made under this Agreement and under any Note. In addition, each Bank agrees that from time to time after the date of this Agreement, when a lapse in time or change in circumstances renders the previous certification obsolete or inaccurate in any material respect, it will deliver to the Borrower and the Administrative Agent two new accurate and complete original signed copies of Internal Revenue Service Form 4224 or 1001, or Form W-8 and a Section
4.04(b)(ii) Certificate, as the case may be, and such other forms as may be required in order to confirm or establish the entitlement of such Bank to a continued exemption from or reduction in United States withholding tax with respect to payments under this Agreement and any Note, or it shall immediately notify the Borrower and the Administrative Agent of its inability to deliver any such Form or Certificate. Notwithstanding anything to the contrary contained in Section 4.04(a), but subject to Section 12.04(b) and the immediately succeeding sentence, (x) the Borrower shall be entitled, to the extent it is required to do so by law, to deduct or withhold income or similar taxes imposed by the United States (or any political subdivision or taxing authority thereof or therein) from

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interest, fees or other amounts payable hereunder for the account of any Bank which is not a United States person (as such term is defined in Section 7701(a)(30) of the Code) for U.S. Federal income tax purposes to the extent that such Bank has not provided to the Borrower U.S. Internal Revenue Service Forms that establish a complete exemption from such deduction or withholding and (y) the Borrower shall not be obligated pursuant to Section 4.04(a) hereof to gross-up payments to be made to a Bank in respect of income or similar taxes imposed by the United States if (I) such Bank has not provided to the Borrower the Internal Revenue Service Forms required to be provided to the Borrower pursuant to this Section 4.04(b) or (II) in the case of a payment, other than interest, to a Bank described in clause (ii) above, to the extent that such Forms do not establish a complete exemption from withholding of such taxes. Notwithstanding anything to the contrary contained in the preceding sentence or elsewhere in this Section 4.04 and except as set forth in Section 12.04(b), the Borrower agrees to pay additional amounts and to indemnify each Bank in the manner set forth in Section 4.04(a) (without regard to the identity of the jurisdiction requiring the deduction or withholding) in respect of any amounts deducted or withheld by it as described in the immediately preceding sentence as a result of any changes after the date of this Agreement in any applicable law, treaty, governmental rule, regulation, guideline or order, or in the interpretation thereof, relating to the deducting or withholding of income or similar Taxes, provided such Bank shall provide to the Borrower and the Administrative Agent any reasonably available applicable IRS tax form
(reasonably similar in its simplicity and lack of detail to IRS Form 1001)
necessary or appropriate for the exemption or reduction in the rate of such U.S. federal withholding tax.

(c) The provisions of this Section 4.04 shall be subject to
Section 1.12(b) (to the extent applicable).

SECTION 5. Conditions Precedent. The occurrence of the Effective Date pursuant to Section 12.10 and the obligation of the Banks to make each Loan hereunder, and the obligation of the Letter of Credit Issuer to issue Letters of Credit hereunder, is subject, at the time of each such Credit Event (except as otherwise hereinafter indicated), to the satisfaction of each of the following conditions:

5.01 Execution of Agreement. (i) The Effective Date shall have occurred as provided in Section 12.10 and (ii) there shall have been delivered to the Administrative Agent for the account of each Bank the appropriate Note executed by the Borrower, and in the amount, maturity and as otherwise provided herein.

5.02 No Default; Representations and Warranties. At the time of each Credit Event and also after giving effect thereto, (i) there shall exist no Default or Event of Default and (ii) all representations and warranties contained herein or in the other Credit Documents in effect at such time shall be true and correct in all material respects with the same effect as though such representations and warranties had been made on and as of the

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date of such Credit Event (except to the extent that such representations and warranties expressly relate to an earlier date in which case they shall be true and correct in all material respects as of such earlier date).

5.03 Officer's Certificate. On the Effective Date, the Administrative Agent shall have received a certificate dated such date signed by the President, any Vice President or the Treasurer of the Borrower stating that all of the applicable conditions set forth in Sections 5.02 and 5.08(a) exist as of such date.

5.04 Opinions of Counsel. On the Effective Date, the Administrative Agent shall have received opinions, addressed to the Administrative Agent and each of the Banks and dated the Effective Date, from
(i) Thompson & Knight, P.C., counsel to the Borrower, which opinion shall cover the matters contained in Exhibit E-1 and (ii) White & Case, special counsel to the Administrative Agent, which opinion shall cover the matters contained in Exhibit E-2.

5.05 Corporate Proceedings. (a) On the Effective Date, the Administrative Agent shall have received from each Credit Party a certificate, dated the Effective Date, signed by the President, any Vice-President, the Treasurer or the Secretary or other appropriate representative of such Credit Party in the form of Exhibit F with appropriate insertions and deletions, together with copies of the resolutions, or such other administrative approval, of such Credit Party referred to in such certificate and all of the foregoing (including each such certificate of formation, certificate of incorporation and by-laws) shall be reasonably satisfactory to the Administrative Agent.

(b) On the Effective Date, all corporate and legal proceedings and all instruments and agreements in connection with the transactions contemplated by this Agreement and the other Credit Documents shall be reasonably satisfactory in form and substance to the Administrative Agent, and the Administrative Agent shall have received all information and copies of all certificates, documents and papers, including good standing certificates and any other records of corporate proceedings and governmental approvals, if any, which the Administrative Agent may have reasonably requested in connection therewith, such documents and papers, where appropriate, to be certified by proper corporate or governmental authorities.

5.06 Existing Indebtedness Agreements. On or prior to the Effective Date, there shall have been delivered to the Administrative Agent copies, certified as true and correct by an appropriate officer of the Borrower of all agreements evidencing or relating to Existing Indebtedness (the "Existing Indebtedness Agreements") all of which Existing Indebtedness Agreements shall be in form and substance reasonably satisfactory to the Administrative Agent.

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5.07 Adverse Change, etc. On the Effective Date, nothing shall have occurred since March 31, 1997 (and neither the Banks nor the Administrative Agent shall have become aware of any facts or conditions not previously known) which the Administrative Agent or the Required Banks shall determine (a) has, or is reasonably likely to have, a material adverse effect on the rights or remedies of the Banks hereunder or under any other Credit Document, or on the ability of the Borrower or any of the Guarantors to perform their respective obligations to them, or (b) has, or is reasonably likely to have, a Material Adverse Effect.

5.08 Litigation. On the Effective Date, there shall be no actions, suits or proceedings pending or threatened (a) with respect to this Agreement or any other Credit Document or the transactions contemplated hereby or thereby or (b) which the Administrative Agent or the Required Banks shall determine is reasonably likely to (i) have a Material Adverse Effect or (ii) have a material adverse effect on the rights or remedies of the Banks hereunder or under any other Credit Document or on the ability of the Borrower or any of the Guarantors to perform their respective obligations to the Banks hereunder or under any other Credit Document.

5.09 Approvals. On the Effective Date, all material necessary governmental and third party approvals in connection with the transactions contemplated by the Credit Documents and otherwise referred to herein or therein shall have been obtained and remain in effect, and all applicable waiting periods shall have expired without any action being taken by any competent authority which restrains or prevents such transactions or imposes, in the reasonable judgment of the Required Banks or the Administrative Agent, materially adverse conditions upon the consummation of such transactions.

5.10 Fees. On the Effective Date, the Borrower shall have paid to the Administrative Agent and the Banks all Fees and expenses agreed upon by such parties to be paid on or prior to such date.

5.11 Guaranty. On the Effective Date, each Guarantor shall have duly authorized, executed and delivered a counterpart to the Guaranty in the form of Exhibit G (as modified, amended or supplemented from time to time in accordance with the terms hereof and thereof, the "Guaranty"), and the Guaranty shall be in full force and effect.

5.12 Rig Reports. On or prior to the Effective Date, the Administrative Agent shall have received:

(i) evidence satisfactory to the Administrative Agent that each Fleet Rig (other than those appearing on Annex III hereto) is classified in the highest class available for rigs of its age and type with the American Bureau of Shipping, Inc. or another internationally recognized classification society acceptable to the

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Administrative Agent, free of any requirements or recommendations, other than such requirements or recommendations which if not cured by the owner thereof would not materially diminish such Fleet Rig's value; and

(ii) a report of recent date from an Approved Rig Broker setting forth the Market Value of each Fleet Rig.

5.13 Insurance Report. On or prior to the Effective Date, the Administrative Agent shall have received a detailed report from Aon or another firm of independent marine insurance brokers reasonably acceptable to the Administrative Agent with respect to the insurance maintained by the Borrower and its Subsidiaries in connection with the Fleet Rigs, together with a certificate from such broker certifying that such insurances are placed with such insurance companies and/or underwriters and/or clubs, in such amounts, against such risks, and in such form, as are normally insured against by similarly situated insureds.

5.14 Projections. On or prior to the Effective Date, the Administrative Agent shall have received (with sufficient copies for each of the Banks, and the Administrative Agent will promptly forward to each of the Banks) the Projections for the next four fiscal years beginning with the year ending December 31, 1997, which Projections, and the supporting assumptions and explanations thereto, shall be reasonably satisfactory in form and substance to the Administrative Agent and the Required Banks.

5.15 Offshore Drilling Contracts. On the Effective Date, all of the offshore drilling contracts described on Annex IV (which Annex IV sets forth each offshore drilling contract expiring on or after the second anniversary of the Effective Date) shall be in full force and effect.

The acceptance of the benefits of each Credit Event shall constitute a representation and warranty by the Borrower to the Administrative Agent and each of the Banks that all of the applicable conditions specified above exist as of that time. All of the certificates, legal opinions and other documents and papers referred to in this Section 5, unless otherwise specified, shall be delivered to the Administrative Agent at its Notice Office for the account of each of the Banks and, except for the Notes, in sufficient counterparts or copies for each of the Banks and shall be satisfactory in form and substance to the Administrative Agent.

SECTION 6. Representations, Warranties and Agreements. In order to induce the Banks to enter into this Agreement and to make the Loans and issue and/or participate in Letters of Credit provided for herein, the Borrower makes the following representations and warranties to, and agreements with, the Banks, all of which shall survive the execution and delivery of this Agreement and the making of the Loans (with the making of each Credit Event thereafter being deemed to constitute a representation and warranty that the

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matters specified in this Section 6 are true and correct in all material respects on and as of the date of each such Credit Event unless such representation and warranty expressly indicates that it is being made as of any specific date, in which case such representations and warranties shall be true and correct in all material respects as of such date):

6.01 Corporate Status. Each Credit Party (i) is a duly organized and validly existing corporation in good standing under the laws of the jurisdiction of its organization and has the corporate power and authority to own its property and assets and to transact the business in which it is engaged, except in such case where the failure to be so duly organized and validly existing in good standing and to have such corporate power and authority (x) is not reasonably likely to have a Material Adverse Effect and
(y) is not reasonably likely to have a material adverse effect on the rights or remedies of the Banks or on the ability of the Borrower or any Guarantor to perform its obligations to them hereunder and under the other Credit Documents to which it is a party, and (ii) has duly qualified and is authorized to do business and is in good standing in all jurisdictions where it is required to be so qualified and where the failure to be so qualified would have a Material Adverse Effect.

6.02 Corporate Power and Authority. Each Credit Party has the corporate power and authority to execute, deliver and carry out the terms and provisions of the Credit Documents to which it is a party and has taken all necessary corporate action to authorize the execution, delivery and performance of the Credit Documents to which it is a party. Each Credit Party has duly executed and delivered each Credit Document to which it is a party and each such Credit Document constitutes the legal, valid and binding obligation of such Credit Party enforceable against such Person in accordance with its terms, except to the extent that the enforceability thereof may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws generally affecting creditors' rights and by equitable principles (regardless of whether enforcement is sought in equity or at law).

6.03 No Violation. Neither the execution, delivery and performance by any Credit Party of the Credit Documents to which it is a party nor compliance with the terms and provisions thereof, nor the consummation of the transactions contemplated therein (i) will contravene any applicable provision of any law, statute, rule, regulation, order, writ, injunction or decree of any court or governmental instrumentality of the United States or any State thereof, (ii) will result in any breach of any of the terms, covenants, conditions or provisions of, or constitute a default under, or result in the creation or imposition of (or the obligation to create or impose) any Lien upon any of the property or assets of the Borrower or any of its Subsidiaries pursuant to the terms of, any indenture, mortgage, deed of trust, agreement or other instrument to which the Borrower or any of its Subsidiaries is a party or by which it or any of its property or assets are bound or to which it is subject or (iii) will violate any provision of the Certificate of Incorporation or By-Laws of the Borrower or any of its Subsidiaries.

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6.04 Litigation. There are no actions, suits or proceedings pending or, to the Borrower's knowledge, after due inquiry, threatened in writing with respect to the Borrower or any of its Subsidiaries (i) that are likely to have a Material Adverse Effect or (ii) that are reasonably likely to have a material adverse effect on the rights or remedies of the Banks or on the ability of the Borrower or any Guarantor to perform its obligations to them hereunder and under the other Credit Documents to which it is a party.

6.05 Use of Proceeds; Margin Regulations. (a) The proceeds of all Loans shall be utilized to provide for the general corporate purposes of the Borrower and its Subsidiaries.

(b) Neither the making of any Loan hereunder, nor the use of the proceeds thereof, will violate or be inconsistent with the provisions of Regulation G, T, U or X of the Board of Governors of the Federal Reserve System and no part of the proceeds of any Loan will be used to purchase or carry any Margin Stock in violation of Regulation U or to extend credit for the purpose of purchasing or carrying any Margin Stock.

6.06 Governmental Approvals. Except for the orders, consents, approvals, licenses, authorizations, validations, recordings, registrations and exemptions that have already been duly made or obtained and remain in full force and effect, no order, consent, approval, license, authorization, or validation of, or filing, recording or registration with, or exemption by, any foreign or domestic governmental or public body or authority, or any subdivision thereof, is required to authorize or is required in connection with
(i) the execution, delivery and performance of any Credit Document or (ii) the legality, validity, binding effect or enforceability of any Credit Document.

6.07 Investment Company Act. Neither the Borrower nor any of its Subsidiaries is an "investment company" or a company "controlled" by an "investment company," within the meaning of the Investment Company Act of 1940, as amended.

6.08 Public Utility Holding Company Act. Neither the Borrower nor any of its Subsidiaries is a "holding company," or a "subsidiary company" of a "holding company," or an "affiliate" of a "holding company" or of a "subsidiary company" of a "holding company," within the meaning of the Public Utility Holding Company Act of 1935, as amended.

6.09 True and Complete Disclosure. All factual information (taken as a whole) heretofore or contemporaneously furnished by or on behalf of the Borrower or any of its Subsidiaries in writing to the Administrative Agent or any Bank for purposes of or in connection with this Agreement or any transaction contemplated herein is, and all other such factual information (taken as a whole) hereafter furnished by or on behalf of any such Person in writing to any Bank will be, true and accurate in all material respects on the date as of

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which such information is dated or certified and not incomplete by omitting to state any material fact necessary to make such information (taken as a whole) not misleading at such time in light of the circumstances under which such information was provided. The Projections contained in such materials are based on good faith estimates and assumptions believed by such Persons to be reasonable at the time made, it being recognized by the Banks that such Projections as to future events are not to be viewed as facts and that actual results during the period or periods covered by any such Projections may differ from the projected results. There is no fact known to the Borrower which is reasonably likely to have a Material Adverse Effect, which has not been disclosed herein or in such other documents, certificates and statements furnished to the Administrative Agent and the Banks for use in connection with the transactions contemplated hereby.

6.10 Financial Condition; Financial Statements; Projections.
(a) On and as of the Effective Date, on a pro forma basis after giving effect to all Indebtedness incurred, and to be incurred, by the Borrower and its Subsidiaries in connection therewith, (x) the sum of the assets, at a fair valuation, of the Borrower and its Subsidiaries taken as a whole will exceed its debts, (y) the Borrower and its Subsidiaries taken as a whole will not have incurred or intended to, or believe that they will, incur debts beyond their ability to pay such debts as such debts mature and (z) the Borrower and its Subsidiaries taken as a whole will not have unreasonably small capital with which to conduct its business.

(b) (i) The consolidated balance sheet of the Borrower at December 31, 1996 and the related consolidated statements of operations and cash flows of the Borrower for the fiscal year, as the case may be, ended as of said date, which have been examined by Price Waterhouse LLP, independent certified public accountants, who delivered an unqualified opinion in respect therewith, and (ii) the consolidated balance sheet of the Borrower as of March 31, 1997, copies of which have heretofore been furnished to each Bank, present fairly the financial position of such entities at the dates of said statements and the results for the period covered thereby in accordance with GAAP, except to the extent provided in the notes to said financial statements and, in the case of the March 31, 1997 statements, subject to normal and recurring year-end audit adjustments. All such financial statements have been prepared in accordance with generally accepted accounting principles and practices consistently applied except to the extent provided in the notes to said financial statements. Nothing has occurred since December 31, 1996 that (x) has had or is reasonably likely to have a material adverse effect on the rights or remedies of the Banks hereunder or under any other Credit Document, or on the ability of the Borrower or any of the Guarantors to perform their respective obligations to them, or (y) has had or is reasonably likely to have a Material Adverse Effect.

(c) Except as reflected in the financial statements and the notes thereto described in Section 6.10(b) or in Annex VIII, there were as of the Effective Date no liabilities or obligations with respect to the Borrower or any of its Subsidiaries of a nature

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(whether absolute, accrued, contingent or otherwise and whether or not due)
which, either individually or in aggregate, would be material to the Borrower and its Subsidiaries taken as a whole, except as incurred subsequent to December 31, 1996 in the ordinary course of business consistent with past practices.

(d) On and as of the Effective Date, the Projections previously delivered to the Administrative Agent have been prepared on a basis consistent with the financial statements referred to in Section 6.10(a) (other than as set forth or presented in such Projections), and there are no statements or conclusions in any of the Projections which are based upon or include information known to the Borrower to be misleading in any material respect or which fail to take into account material information not otherwise disclosed in writing to the Administrative Agent and the Banks regarding the matters reported therein. On the Effective Date, the Borrower believed that the Projections were reasonable and attainable.

6.11 Tax Returns and Payments. Each of the Borrower and each of its Subsidiaries has filed all federal income tax returns and all other material tax returns, domestic and foreign, required to be filed by it and has paid all material taxes and assessments payable by it which have become due, other than those not yet delinquent and except for those contested in good faith. The Borrower and each of its Subsidiaries has paid, or has provided adequate reserves (in the good faith judgment of the management of the Borrower) for the payment of, all federal, state and foreign income taxes applicable for all prior fiscal years and for the current fiscal year to the date hereof.

6.12 Employee Benefit Plans. (a) Neither the Borrower nor any Subsidiary nor any ERISA Affiliate has ever maintained or contributed to (or had an obligation to contribute to) any Plan or any Foreign Pension Plan where any current or reasonably foreseeable liability of the Borrower with respect to such Plan or such Foreign Pension Plan would be reasonably likely to have a Material Adverse Effect. All contributions required to be made with respect to
(i) any employee pension benefit plan (as defined in Section 3(2) of ERISA) maintained or contributed to by (or to which there is an obligation to contribute of) the Borrower or a Subsidiary or an ERISA Affiliate and (ii) any Foreign Pension Plan have been timely made except any such failures to contribute which would not individually or in the aggregate be reasonably likely to have a Material Adverse Effect. The Borrower and its Subsidiaries may cease contributions to or terminate any employee benefit plan (within the meaning of Section 3(3) of ERISA) maintained or contributed to by (or to which there is an obligation to contribute of) any of them without incurring any liability which, individually or in the aggregate would be reasonably likely to have a Material Adverse Effect.

(b) Each Foreign Pension Plan has been maintained in substantial compliance with its terms and with the requirements of any and all applicable laws, statutes, rules, regulations and orders and has been maintained, where required, in good standing with applicable regulatory authorities.

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6.13 Subsidiaries. Annex V lists each Subsidiary of the Borrower (and the direct and indirect ownership interest of the Borrower therein), in each case existing on the Effective Date.

6.14 Patents, etc. The Borrower and each of its Subsidiaries has obtained all material patents, trademarks, service marks, trade names, copyrights, licenses and other rights, free from burdensome restrictions, that are necessary for the operation of their businesses taken as a whole as presently conducted.

6.15 Pollution and Other Regulations. (a) Each of the Borrower and its Subsidiaries is in compliance with all applicable Environmental Laws governing its business for which failure to comply is reasonably likely to have a Material Adverse Effect, and neither the Borrower nor any of its Subsidiaries is liable for any material penalties, fines or forfeitures for failure to comply with any of the foregoing. All licenses, permits, registrations or approvals required for the business of the Borrower and each of its Subsidiaries, as conducted as of the Effective Date, under any Environmental Law have been secured and the Borrower and each of its Subsidiaries is in substantial compliance therewith, except such licenses, permits, registrations or approvals the failure to secure or to comply therewith is not likely to have a Material Adverse Effect. Neither the Borrower nor any of its Subsidiaries is in any respect in noncompliance with, breach of or default under any applicable writ, order, judgment, injunction, or decree to which the Borrower or such Subsidiary is a party or which would affect the ability of the Borrower or such Subsidiary to operate any Real Property, Fleet Rig or other facility and no event has occurred and is continuing which, with the passage of time or the giving of notice or both, would constitute noncompliance, breach of or default thereunder, except in each such case, such noncompliance, breaches or defaults as are not likely to, in the aggregate, have a Material Adverse Effect. There are as of the Effective Date no Environmental Claims pending or, to the knowledge, after due inquiry, of the Borrower, threatened, against the Borrower or any of its Subsidiaries wherein an unfavorable decision, ruling or finding would be reasonably likely to have a Material Adverse Effect. There are no facts, circumstances, conditions or occurrences on any Real Property, Fleet Rig or other facility owned or operated by the Borrower or any of its Subsidiaries that is reasonably likely (i) to form the basis of an Environmental Claim against the Borrower, any of its Subsidiaries or any Real Property, Fleet Rig or other facility owned by the Borrower or any of its Subsidiaries, or (ii) to cause such Real Property, Fleet Rig or other facility to be subject to any restrictions on its ownership, occupancy, use or transferability under any Environmental Law, except in each such case, such Environmental Claims or restrictions that individually or in the aggregate are not reasonably likely to have a Material Adverse Effect.

(b) Hazardous Materials have not at any time been (i) generated, used, treated or stored on, or transported to or from, any Real Property, Fleet Rig or other facility at any time owned or operated by the Borrower or any of its Subsidiaries or (ii) released on

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or from any such Real Property, Fleet Rig or other facility, in each case where, to the Borrower's knowledge, after due inquiry, such occurrence or event individually or in the aggregate is reasonably likely to have a Material Adverse Effect.

6.16 Properties. (a) The Borrower and each of its Subsidiaries has title to all material properties owned by them including all property reflected in the consolidated balance sheet of the Borrower and its Subsidiaries as referred to in Section 6.10(b), free and clear of all Liens, other than (i) as referred to in the consolidated balance sheet or in the notes thereto or (ii) Permitted Liens.

(b) Annex VI sets forth all the Real Property owned or leased by the Borrower and each of its Subsidiaries on the Effective Date and identifies each such property by its street address.

(c) Annex VII sets forth all the Fleet Rigs owned or chartered by the Borrower and each of its Subsidiaries on the Effective Date, and identifies the registered owner, flag, official or patent number, as the case may be, the home port, class, location and operating status on the Effective Date, indicates which of such Fleet Rigs are Unencumbered Rigs, and, if chartered-in by the Borrower or any of its Subsidiaries, the name and address of the owner of such chartered-in vessel.

6.17 Labor Relations. Neither the Borrower nor its Subsidiaries is engaged in any unfair labor practice that is reasonably likely to have a Material Adverse Effect. There is (i) no unfair labor practice complaint pending against the Borrower or any of its Subsidiaries or threatened against any of them, before the National Labor Relations Board, and no grievance or arbitration proceeding arising out of or under any collective bargaining agreement is so pending against the Borrower or any of its Subsidiaries or, to the Borrower's knowledge, after due inquiry, threatened against any of them,
(ii) no strike, labor dispute, slowdown or stoppage pending against the Borrower or any of its Subsidiaries or, to the best of the Borrower's knowledge, threatened against the Borrower or any of its Subsidiaries and (iii) no union representation petition existing with respect to the employees of the Borrower or any of its Subsidiaries and no union organizing activities are taking place, except with respect to any matter specified in clause (i), (ii) or (iii) above, either individually or in the aggregate, such as is not reasonably likely to have a Material Adverse Effect.

6.18 Existing Indebtedness. Annex VIII sets forth a true and complete list of all Indebtedness of the Borrower and each of its Subsidiaries on the Effective Date and which is to remain outstanding after the Effective Date (excluding the Loans and the Letters of Credit, the "Existing Indebtedness"), in each case showing the aggregate principal amount thereof and the name of the respective borrower (or issuer) and any other entity which directly or indirectly guaranteed such debt.

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6.19 Rig Classification. Each Fleet Rig (except for such Fleet Rigs listed on Annex III) owned or leased by the Borrower and its Subsidiaries is classified in the highest class available for rigs of its age and type with the American Bureau of Shipping, Inc. or another internationally recognized classification society reasonably acceptable to the Administrative Agent, free of any material requirements or recommendations, provided that (i) the Submersible Rigs may be out of class as a result of, and pending the completion of, capital upgrades to such Submersible Rigs and (ii) Fleet Rigs acquired after the Effective Date which are scheduled to be upgraded may change class as a result of such upgrades and may be out of class as a result of, and pending the completion of, such upgrades.

SECTION 7. Affirmative Covenants. The Borrower covenants and agrees that on the Effective Date and thereafter for so long as this Agreement is in effect and until the Commitments have terminated, no Letters of Credit or Notes are outstanding and the Loans and Unpaid Drawings, together with interest, Fees and all other Obligations incurred hereunder, are paid in full:

7.01 Information Covenants. The Borrower will furnish to the Administrative Agent (with sufficient copies for each of the Banks, and the Administrative Agent will promptly forward to each of the Banks):

(a) Annual Financial Statements. Within 120 days after the close of each fiscal year of the Borrower, the consolidated balance sheet of the Borrower and its Subsidiaries, as at the end of such fiscal year and the related consolidated statements of income and retained earnings and of cash flows for such fiscal year, in each case setting forth comparative consolidated figures for the preceding fiscal year, and examined by independent certified public accountants of recognized national standing whose opinion shall not be qualified as to the scope of audit and as to the status of the Borrower and its Subsidiaries as a going concern, together with a certificate of such accounting firm stating that in the course of its regular audit of the business of the Borrower, which audit was conducted in accordance with generally accepted auditing standards, such accounting firm has obtained no knowledge of any Default or Event of Default which has occurred and is continuing or, if in the opinion of such accounting firm such a Default or Event of Default has occurred and is continuing, a statement as to the nature thereof.

(b) Quarterly Financial Statements. As soon as available and in any event within 60 days after the close of each of the first three quarterly accounting periods in each fiscal year, the consolidated balance sheet of the Borrower and its Subsidiaries, as at the end of such quarterly period and the related consolidated statements of income and retained earnings and of cash flows for such quarterly period and for the elapsed portion of the fiscal year ended with the last day of such quarterly period, including the amount of consolidated capital expenditures made during such period,

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and in each case setting forth comparative consolidated figures for the related period in the prior fiscal year, all of which shall be certified by the Senior Vice President-Finance or Controller of the Borrower, subject to changes resulting from audit and normal year-end audit adjustments.

(c) Rig Status Report. As soon as available and in any event within 60 days after the close of each quarterly accounting period, a report detailing (i) the then current location of each of the offshore drilling rigs owned or leased by the Borrower and its Subsidiaries, (ii) the then current term of and parties to any contract of any such Fleet Rigs and (iii) the day rate for each Fleet Rig on the date of such report.

(d) Annual Rig Valuation Report. At the time of the delivery of the financial statements provided for in Section 7.01(a), an updated rig valuation report from an Approved Rig Broker setting forth the current Market Value of each Fleet Rig.

(e) Budgets; Projections; etc. Not more than 60 days after the commencement of each fiscal year of the Borrower, (i) a budget, certified by the Senior Vice President-Finance or Controller of the Borrower, which includes an income statement, balance sheet and cash flow statement of the Borrower and its Subsidiaries for each of the four fiscal quarters of such fiscal year, including a breakdown of revenues, operating expenses, utilizations and capital expenditures by class of rig for the Fleet Rigs, and a general statement of allocations of revenues, expenses and capital expenditures to turnkey drilling operations, engineering and production management services operations and Small Scale Field Development activities and (ii) updated Projections for the four succeeding fiscal years, beginning with the then current fiscal year, in substantially the same form as the Projections delivered pursuant to Section 5.14.

(f) Compliance Certificate. At the time of the delivery of the financial statements provided for in Sections 7.01(a) and (b), a certificate of the Borrower signed by its Senior Vice President-Finance, Controller or other Authorized Officer in the form of Exhibit H to the effect that no Default or Event of Default exists or, if any Default or Event of Default does exist, specifying the nature and extent thereof, which certificate shall set forth the calculations required to establish whether the Borrower and its Subsidiaries were in compliance with the provisions of Section 8 as at the end of such fiscal period or year, as the case may be.

(g) At the time of the delivery of the financial statements provided for in Sections 7.01(a) and (b), a statement of the Borrower, signed by the Senior Vice President-Finance or Controller setting forth for each Project Finance Subsidiary, the then outstanding principal amount of Project Finance Indebtedness of such Subsidiary and the Fleet Rigs pledged in support of such Project Finance Indebtedness, including

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a statement of the Market Value of such Fleet Rigs (calculated as of the Effective Date for each such Fleet Rig owned on the Effective Date) pledged in support of such Project Finance Indebtedness and the then remaining unused portion of Permitted Liens allowed pursuant to Section 8.04(h).

(h) Notice of Default or Litigation. Promptly, and in any event within (x) seven Business Days after the Borrower obtains knowledge thereof, notice of the occurrence of any event which constitutes a Default or Event of Default, which notice shall specify the nature thereof, the period of existence thereof and what action the Borrower proposes to take with respect thereto and (y) ten Business Days after the Borrower obtains knowledge thereof, notice of the commencement of or any significant development in any litigation or governmental proceeding pending against the Borrower or any of its Subsidiaries which is likely to have a Material Adverse Effect or is likely to have a material adverse effect on the ability of the Borrower or any Guarantor to perform its obligations hereunder or under any other Credit Document.

(i) SEC Reports. Promptly upon transmission thereof, copies of any material filings and registration with, and reports to, the SEC by the Borrower or any of its Subsidiaries and copies of all financial statements, proxy statements, notices and reports as the Borrower or any of its Subsidiaries shall generally send to analysts or all holders of their capital stock in their capacity as such holders (in each case to the extent not theretofore delivered to the Administrative Agent pursuant to this Agreement).

(j) Credit Rating. As soon as possible and in any event within 10 days after any change in (i) the credit rating assigned by Moody's or S&P to any long-term unsecured debt of the Borrower (including, without limitation, any change in the Moody's Credit Rating or the S&P Credit Rating) and/or (ii) the stated implied senior debt rating assigned by Moody's or S&P with respect to the Borrower; notice of such change and the date on which it was first announced by the applicable rating agency.

(k) Other Information. From time to time, such other information or documents (financial or otherwise) as the Administrative Agent on its own behalf or on behalf of the Required Banks may reasonably request.

7.02 Books, Records and Inspections. The Borrower will, and will cause its Subsidiaries to, permit, upon reasonable notice to the Senior Vice President-Finance, Controller or any other Authorized Officer of the Borrower, officers and designated representatives of the Administrative Agent (at the expense of the Administrative Agent, but after the occurrence and during the continuance of an Event of Default, at the expense of the Borrower) or the Required Banks (at the expense of such Banks), to the extent necessary, to

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examine the books of account of the Borrower and any of its Subsidiaries and discuss the affairs, finances and accounts of the Borrower and of any of its Subsidiaries with, and be advised as to the same by, its and their officers and independent accountants, all at such reasonable times and intervals and to such reasonable extent as the Administrative Agent or the Required Banks may desire.

7.03 Maintenance of Property; Insurance. The Borrower will, and will cause each of its Subsidiaries to, at all times maintain in full force and effect insurance in such amounts with carriers of such insurance industry ratings, covering such risks and liabilities and with such deductibles or self-insured retentions as are in accordance with normal industry practice for similarly situated insureds. The Borrower will, and will cause each of its Subsidiaries to, furnish to the Administrative Agent on or before August 30th of each year, beginning with calendar year 1998, a summary of the insurance carried together with certificates of insurance and other evidence of such insurance.

7.04 Payment of Taxes. The Borrower will pay and discharge, and will cause each of its Subsidiaries to pay and discharge, all taxes, assessments and governmental charges or levies imposed upon it or upon its income or profits, or upon any properties belonging to it, prior to the date on which penalties attach thereto, and all lawful claims which, if unpaid, might become a Lien or charge upon any properties of the Borrower or any of its Subsidiaries, provided that neither the Borrower nor any Subsidiary shall be required to pay any such tax, assessment, charge, levy or claim which is being contested in good faith and by proper proceedings if it has maintained adequate reserves (in the good faith judgment of the management of the Borrower) with respect thereto in accordance with GAAP.

7.05 Consolidated Corporate Franchises. The Borrower will do, and will cause each Subsidiary to do, or cause to be done, all things necessary to preserve and keep in full force and effect its corporate existence, material rights and authority, unless the failure to do so is not reasonably likely to have a Material Adverse Effect, provided that any transaction permitted by
Section 8.02 will not constitute a breach of this Section 7.05.

7.06 Compliance with Statutes, etc. The Borrower will, and will cause each Subsidiary to, comply with all applicable statutes, regulations and orders of, and all applicable restrictions imposed by, all governmental bodies, domestic or foreign, in respect of the conduct of its business and the ownership of its property other than those the non- compliance with which would not have a Material Adverse Effect or would not have a material adverse effect on the ability of the Borrower or any Guarantor to perform its obligations under any Credit Document to which it is party.

7.07 Good Repair. Except for the Fleet Rigs currently under or scheduled to be repaired or which have been damaged or have suffered a casualty as to which (within a reasonable period of time) the Borrower has not made a determination whether to replace

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or repair, or if the determination to replace or repair has been made, as to which such replacement or repairs are being undertaken, subject to availability of equipment, materials and/or repair facilities, the Borrower will, and will cause each of its Subsidiaries to, keep its properties and equipment used or useful in its business, in whomsoever's possession they may be, in good repair, working order and condition, normal wear and tear excepted, and, subject to
Section 8.02, see that from time to time there are made in such properties and equipment all needful and proper repairs, renewals, replacements, extensions, additions, betterments and improvements thereto, (i) to the extent and in the manner useful or customary for companies in similar businesses and (ii) to the extent where the failure to do so is reasonably likely to cause a Material Adverse Effect.

7.08 End of Fiscal Years; Fiscal Quarters. The Borrower will, for financial reporting purposes, cause (i) each of its fiscal years to end on December 31 of each year and (ii) each of its fiscal quarters to end on March 31, June 30, September 30 and December 31 of each year.

7.09 Use of Proceeds. All proceeds of the Loans shall be used as provided in Section 6.05.

7.10 Rig Valuations. In addition to the valuation reports delivered pursuant to Section 7.01(d), at any time when in the reasonable judgment of the Administrative Agent or the Required Banks, there has been an adverse development in the market for offshore drilling rigs which is likely to adversely affect the aggregate Market Value of the Fleet Rigs, the Borrower, at the request of the Administrative Agent, or the Required Banks, will obtain an updated appraisal of the Fleet Rigs from an Approved Rig Broker, substantially in the form of the reports delivered pursuant to Section 5.12 and confirming compliance with Section 8.11 (a) and (b), provided that only one such additional Fleet appraisal per calendar year shall be obtained at the expense of the Borrower, with any subsequent appraisals during such calendar year to be for the account of the Banks pro rata according to their Commitments.

7.11 Additional Guarantors. The Borrower shall cause each Domestic Subsidiary (other than a Project Finance Subsidiary for so long as such Subsidiary remains a Project Finance Subsidiary) established or created after the Effective Date to execute and deliver a guaranty of all Obligations and all obligations under Interest Rate Agreements in substantially the form of the Guaranty.

7.12 ERISA. As soon as possible and, in any event, within 10 days after the Borrower, any Subsidiary or any ERISA Affiliate knows or has reason to know that: (a) a material contribution required to be made with respect to (i) any employee pension benefit plan (as defined in Section 3(2) of ERISA) maintained or contributed to by (or to which there is an obligation to contribute of) the Borrower or a Subsidiary or an ERISA Affiliate or (ii)

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any Foreign Pension Plan has not been timely made or (b) the Borrower or any Subsidiary may incur any material liability pursuant to any employee welfare benefit plan (as defined in Section 3(1) of ERISA) that provides benefits to retired employees or other former employees (other than as required by Section 601 of ERISA) or any employee pension benefit plan (as defined in Section 3(2) of ERISA), the Borrower will deliver to each of the Banks a certificate of the Senior Vice President-Finance or Controller of the Borrower setting forth details as to such occurrence and the action, if any, that the Borrower, such Subsidiary or such ERISA Affiliate is required or proposes to take, together with any notices required or proposed to be given to or filed with or by the Borrower, the Subsidiary, the ERISA Affiliate, a plan participant or the plan administrator.

SECTION 8. Negative Covenants. The Borrower hereby covenants and agrees that as of the Effective Date and thereafter for so long as this Agreement is in effect and until the Commitments have terminated, no Letters of Credit or Notes are outstanding and the Loans and Unpaid Drawings, together with interest, Fees and all other Obligations incurred hereunder, are paid in full:

8.01 Changes in Business. The Borrower will not, and will not permit any of its Subsidiaries to, materially alter the character of the business of the Borrower and its Subsidiaries taken as a whole from that conducted at the Effective Date (including any material expansion outside of the offshore contract drilling, turnkey drilling and engineering and production management services business), provided that this Section 8.01 shall not restrict the making of any investment expressly permitted by Section 8.05 or the engaging in or acquisition of any business or assets substantially ancillary to the offshore contract drilling, turnkey drilling and engineering and production management services business which shall in any event include floating production systems, well construction management, field management, multi-service vessels, joint venture engineering companies, Small Scale Field Development and floating production and storage operations.

8.02 Consolidation, Merger, Sale of Assets, etc. The Borrower will not, and will not permit any Subsidiary to, wind up, liquidate or dissolve its affairs, or enter into any transaction of merger or consolidation, sell or otherwise dispose of all or any part of its property or assets (other than inventory or obsolete equipment or excess equipment no longer needed in the conduct of the business in the ordinary course of business) or agree to do any of the foregoing at any future time, except that the following shall be permitted:

(a) (i) any Subsidiary of the Borrower may be merged or consolidated with or into, or be liquidated into, the Borrower (so long as the Borrower is the surviving corporation) or any Guarantor (so long as such Guarantor is the surviving corporation) or any other Person (so long as such Subsidiary is the surviving corporation or, if such Subsidiary is a Guarantor and is not the surviving corporation, the surviving corporation becomes a Guarantor hereunder), (ii) all or any part of the business,

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properties and assets of the Borrower or any of its Subsidiaries may be conveyed, leased, sold or transferred to the Borrower or any Guarantor,
(iii) so long as no Default or Event of Default exists or would result therefrom, the Borrower or any of its Subsidiaries may, subject to the provisions of Section 3.03(b), sell or dispose of any Fleet Rig which is not pledged in support of Project Finance Indebtedness pursuant to clause 8.04(h);

(b) Restricted Payments permitted pursuant to Section 8.05; and

(c) other sales or dispositions of assets, provided that (x) (A) the Total Commitment shall be reduced to the extent required by Section 3.03(b) upon the receipt of any Net Cash Proceeds and/or other consideration received from all such sales and dispositions and (B) all proceeds thereof shall be used without violating the provisions of
Section 8.01 and (y) each such sale or disposition shall be in an amount at least equal to the fair market value thereof (as determined by the Board of Directors of the Borrower in the case of sales in excess of $100,000,000).

8.03 Indebtedness. The Borrower will not, and will not permit any of its Subsidiaries to contract, create, incur, assume or suffer to exist any Indebtedness, except:

(a) Indebtedness incurred pursuant to this Agreement and the other Credit Documents;

(b) Indebtedness existing on the Effective Date and listed on Annex VIII, without giving effect to any subsequent extensions, refinancings or renewals thereof;

(c) Indebtedness consisting of intercompany loans and advances
(i) from the Borrower or any of its Subsidiaries to the Borrower or any Guarantor or from any Subsidiary which is not a Guarantor to another Subsidiary which is not a Guarantor, provided that all such Indebtedness is unsecured and expressly subordinate to any Obligations of the debtor with respect to such intercompany Indebtedness and (ii) from the Borrower or any Guarantor to a Subsidiary which is not a Guarantor, provided that such Indebtedness pursuant to this clause (ii) shall not exceed $294,000,000 in the aggregate at any time outstanding;

(d) Capitalized Lease Obligations and Purchase Money Indebtedness relating to assets other than Fleet Rigs in an aggregate amount not to exceed $5,000,000 at any one time.

(e) other Project Finance Indebtedness in an amount not to exceed at any one time $400,000,000 in the aggregate and guaranties by the Borrower of such Project Finance Indebtedness;

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(f) the Transamerica Financing, provided that such Indebtedness shall not exceed $20,000,000 in the aggregate at any time outstanding;

(g) the Triton Financing, provided that such Indebtedness shall not exceed $10,000,000 in the aggregate at any time outstanding; and

(h) other unsecured Indebtedness of the Borrower and its Subsidiaries not described in clauses (a) through (e) above in an aggregate outstanding amount not to exceed $1,000,000 at any one time.

8.04 Liens. The Borrower will not, and will not permit any of its Subsidiaries to, create, incur, assume or suffer to exist any Lien upon or with respect to any property or assets (real or personal, tangible or intangible) of the Borrower or any of its Subsidiaries, whether now owned or hereafter acquired or sell any such property or assets subject to an understanding or agreement, contingent or otherwise, to repurchase such property or assets (including sales of accounts receivable or notes with recourse to the Borrower or any Subsidiary of the Borrower) or assign any right to receive income, or file or permit the filing of any financing statement under the UCC or any other similar notice of Lien under any similar recording or notice statute, except:

(a) Liens for taxes not yet due or Liens for taxes being contested in good faith and by appropriate proceedings for which adequate reserves (in the good faith judgment of the management of the Borrower) have been established;

(b) Liens imposed by law or arising by operation of law which were incurred in the ordinary course of business, such as carriers', warehousemen's and mechanics' Liens, statutory landlord's Liens, maritime Liens and other similar Liens arising in the ordinary course of business, and (x) which do not in the aggregate materially detract from the value of the Borrower's or any Subsidiary's property or assets or materially impair the use thereof in the operation of the business of the Borrower or any Subsidiary or (y) which are being contested in good faith by appropriate proceedings (including the providing of bail), which proceedings have the effect of preventing the forfeiture or sale of the property or assets subject to such Lien or procuring the release of the property or assets subject to such Lien from arrest or detention;

(c) Liens created in favor of the Banks;

(d) Liens existing on the Effective Date and listed on Annex IX, without giving effect to any subsequent extensions, refinancings or renewals thereof;

(e) Liens arising from judgments, decrees or attachments (or securing of appeal bonds with respect thereto) to the extent not covered by insurance, so long as

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the obligations in connection therewith do not exceed $5,000,000 and otherwise in circumstances not constituting an Event of Default under
Section 9.07;

(f) any interest or title of a lessor or charterer under any lease permitted by this Agreement;

(g) immaterial Liens on any assets of the Borrower or any of its Subsidiaries other than the Fleet Rigs; or

(h) Liens on (i) Submersible Fleet Rigs and the earnings and insurances relating thereto, (ii) up to $400,000,000 in aggregate Market Value of additional Fleet Rigs owned on the Effective Date (without giving effect to any losses, sales or other dispositions with respect to such pledged assets), the earnings and insurances relating thereto and any replacement assets purchased solely with the Cash Proceeds of any sale and/or loss of any such pledged Fleet Rig; provided that Liens permitted by this clause (h) shall secure Project Finance Indebtedness permitted by Section 8.03(e).

(i) Liens existing on the Effective Date on accounts receivable of Triton to secure up to $10,000,000 in the aggregate of Indebtedness of Triton.

(j) Liens attaching to specific assets at the time acquired by the Borrower or any of its Subsidiaries (and not to all such assets generally), provided that (x) any such Liens, and the Indebtedness secured thereby, were not created at the time of or in contemplation of the acquisition of such assets by the Borrower or its Subsidiaries, (y) the Indebtedness secured by any such Lien does not exceed 100% of the fair market value of the asset to which such Lien is attached, determined at the time of the acquisition of such asset, and (z) the Indebtedness (if any) secured thereby is permitted by Section 8.03;

(k) Liens (other than any Lien imposed by ERISA) incurred or deposits made in the ordinary course of business consistent with past practices and securing obligations not to exceed $25,000,000 in the aggregate (i) in connection with workers' compensation, unemployment insurance and other types of social security or retirement benefits, or
(ii) to secure the performance of tenders, statutory obligations, surety bonds, appeal bonds, bids, leases (other than Capital Leases), performance bonds, purchase, construction or sales contracts and other similar obligations, in each case not incurred or made in connection with (x) the borrowing of money, (y) the obtaining of advances or credit or (z) the payment of the deferred purchase price of property;

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(l) leases or subleases granted to others, easements, rights- of-way, restrictions and other similar charges, encumbrances or minor title defects, in each case incidental to, and not interfering with, or reasonably likely to interfere with, the ordinary conduct of the business of the Borrower or any of its Subsidiaries;

(m) Liens securing Capitalized Lease Obligations and Purchase Money Indebtedness permitted by Section 8.03(d), provided such Liens shall extend solely to the property (or improvement thereon) financed; and

(n) Liens under the Safe Harbor Leases, the Letter of Credit Agreement and the Mortgage, as such terms are defined in, and as contemplated by, the Asset Purchase Agreement dated August 20, 1993 between the Borrower and Portal Rig Corporation, with respect to the property acquired pursuant thereto;

8.05 Restricted Payments. The Borrower will not, and will not permit any of its Subsidiaries to, make any Restricted Payments, except:

(a) So long as no Default or Event of Default exists or would result therefrom, the Borrower and its Subsidiaries may pay Dividends in an amount not to exceed in the aggregate $275,000,000 plus the Cumulative Net Income Amount then in effect, provided that the Borrower and its Subsidiaries may not pay any Dividend which, when combined with all previous Dividends paid by the Borrower and its Subsidiaries, the proceeds of which were not used to repurchase outstanding shares of common stock of the Borrower, would exceed the Cumulative Net Income Amount, except to the extent the proceeds of such Dividend are used solely to repurchase outstanding common stock of the Borrower;

(b) any Subsidiary of the Borrower may pay Dividends to the Borrower or to any Guarantor and any Subsidiary which is not a Guarantor may pay Dividends to any other Subsidiary which is not a Guarantor; and

(c) in addition to any dividends paid pursuant to clauses (a) and (b) above, the Borrower may redeem or repurchase common stock of the Borrower (or options to purchase such common stock) from (1) present or former officers, employees and directors (or their estates) upon the death, permanent disability, retirement or termination of employment of any such Person or otherwise in accordance with any stock option plan or any employee stock ownership plan, or (2) stockholders of the Borrower so long as the purpose of such purchase is to acquire common stock of the Borrower for reissuance to new officers, employees and directors (or their estates) of the Borrower to the extent so reissued within 6 months of any such purchase, provided that in all such cases (x) no Default or Event of Default is then in existence or would arise therefrom, (y) the aggregate amount of all

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cash paid in respect of all such shares so redeemed or repurchased in any calendar year does not exceed $1,000,000 plus proceeds of key man life insurance used for the purpose of repurchasing such common stock owned by such Person and, provided further, that in the event that the Borrower subsequently resells to any member of its, or any Subsidiary's management, any shares redeemed or repurchased pursuant to this clause
(ii), the amount of repurchases the Borrower may make from officers, employees and directors pursuant to this clause (ii) shall be increased by an amount equal to any cash received by the Borrower upon the resale of such shares.

8.06 Restrictions on Subsidiaries. The Borrower will not, and will not permit any of its Subsidiaries to, create or otherwise cause or suffer to exist any encumbrance or restriction which prohibits or otherwise restricts (A) the ability of any Subsidiary to (a) pay dividends or make other distributions or pay any Indebtedness owed to the Borrower or any Subsidiary,
(b) make loans or advances to the Borrower or any Subsidiary, (c) transfer any of its properties or assets to the Borrower or any Subsidiary or (B) the ability of the Borrower or any other Subsidiary of the Borrower to create, incur, assume or suffer to exist any Lien upon its property or assets to secure the Obligations, other than prohibitions or restrictions existing under or by reason of:

(i) this Agreement and the other Credit Documents;

(ii) applicable law;

(iii) customary non-assignment provisions entered into in the ordinary course of business and consistent with past practices;

(iv) any restriction or encumbrance with respect to a Subsidiary of the Borrower imposed pursuant to an agreement which has been entered into for the sale or disposition of all or substantially all of the capital stock or assets of such Subsidiary, so long as such sale or disposition is permitted under this Agreement; and

(v) Permitted Liens and any documents or instruments governing the terms of any Indebtedness or other obligations secured by any such Liens, provided that such prohibitions or restrictions apply only to the assets subject to such Liens.

8.07 Transactions with Affiliates. (a) The Borrower will not, and will not permit any Subsidiary to, enter into any transaction or series of transactions after the Effective Date whether or not in the ordinary course of business, with any Affiliate other than on terms and conditions substantially as favorable to the Borrower or such Subsidiary as would be obtainable by the Borrower or such Subsidiary at the time in a comparable arm's-length transaction with a Person other than an Affiliate, provided that the foregoing restrictions shall not apply to (i) employment arrangements entered into in the ordinary

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course of business with officers of the Borrower and its Subsidiaries, (ii) customary fees paid to members of the Board of Directors of the Borrower and of its Subsidiaries, (iii) immaterial transactions with the officers or members of the Board of Directors of the Borrower or its Subsidiaries and (iv) immaterial transactions with Affiliates; and

(b) the Borrower will not and will not permit any Guarantor to transfer any Fleet Rig to any Subsidiary which is not a Guarantor, provided that (i) any Guarantor may transfer any Submersible Rig or a Fleet Rig acquired after the Effective Date which does not constitute a replacement asset pursuant to Section 3.03(b)(i) to a Subsidiary which is not a Guarantor so long as any such transferred Fleet Rig is promptly thereafter pledged in support of Project Finance Indebtedness pursuant to Sections 8.03(e) and 8.04(h).

8.08 Fleet Rig Management. The Borrower shall not, and shall not permit any of its Subsidiaries to, contract out the management of Fleet Rigs with an aggregate Market Value exceeding 10% of the aggregate Market Value of the Fleet.

8.09 Interest Coverage Ratio. The Borrower shall not permit the ratio of (i) Adjusted Consolidated EBITDA to (ii) Consolidated Interest Expense for any period of four consecutive fiscal quarters of the Borrower to be less than 3.00:1.00.

8.10 Leverage Ratio. The Borrower shall not permit the Leverage Ratio at any time to be more than 0.40:1.00.

8.11 Fleet Market Value. (a) The Borrower shall not permit the aggregate Market Value of the Fleet at any time to be less than (i) 2.5 times the sum of (x) Consolidated Indebtedness plus (y) the Available Unutilized Total Commitment.

(b) The Borrower shall not permit the aggregate Market Value of the Unencumbered Fleet Rigs at any time to be less than 2.5 times the sum of
(x) Consolidated Unsecured Indebtedness and (y) the Available Unutilized Total Commitment.

8.12 Net Worth. The Borrower shall not permit Consolidated Net Worth at any time to be less than $750,000,000 plus 50% of Consolidated Net Income (determined on a cumulative basis) for all Cumulative Net Income Periods ending prior to the date of determination for which Consolidated Net Income was a positive number.

SECTION 9. Events of Default. Upon the occurrence of any of the following specified events (each an "Event of Default"):

9.01 Payments. The Borrower shall default in the payment when due of any principal of the Loans or default in the payment when due, and such default shall continue

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for more than two Business Days, of any interest, Fees, Unpaid Drawings or other amounts owing hereunder or under any other Credit Document; or

9.02 Representations, etc. Any representation, warranty or statement made by the Borrower herein or in any other Credit Document or in any statement or certificate delivered or required to be delivered pursuant hereto or thereto shall prove to be untrue in any material respect on the date as of which made or deemed made; or

9.03 Covenants. The Borrower shall (a) default in the due performance or observance by it of any term, covenant or agreement contained in
Section 7.08 or Section 8 or (b) default in the due performance or observance by it of any term, covenant or agreement (other than those referred to in
Section 9.01, 9.02 or clause (a) of this Section 9.03) contained in this Agreement and such default shall continue unremedied for a period of at least 30 days after notice to the Borrower by the Administrative Agent or the Required Banks; or

9.04 Default Under Other Agreements. (a) The Borrower or any of its Subsidiaries shall (i) default in any payment with respect to any Indebtedness (other than the Obligations) beyond the period of grace, if any, applicable thereto or (ii) default in the observance or performance of any agreement or condition relating to any such Indebtedness or contained in any instrument or agreement evidencing, securing or relating thereto, or any other event shall occur or condition exist, the effect of which default or other event or condition is to cause, or to permit the holder or holders of such Indebtedness (or a trustee or agent on behalf of such holder or holders) to cause any such Indebtedness to become due prior to its stated maturity; or (b) any such Indebtedness of the Borrower or any of its Subsidiaries shall be declared to be due and payable, or required to be prepaid other than by a regularly scheduled required prepayment, prior to the stated maturity thereof, provided that it shall not constitute an Event of Default pursuant to this
Section 9.04 unless the aggregate amount of all Indebtedness referred to in clauses (a) and (b) above exceeds $25,000,000 at any one time; or

9.05 Bankruptcy, etc. The Borrower or any Subsidiary shall commence a voluntary case concerning itself under Title 11 of the United States Code entitled "Bankruptcy", as now or hereafter in effect, or any successor thereto (the "Bankruptcy Code"); or an involuntary case is commenced against the Borrower or any other Credit Party and the petition is not controverted within 10 days, or is not dismissed within 60 days, after commencement of the case; or a custodian (as defined in the Bankruptcy Code) is appointed for, or takes charge of, all or substantially all of the property of the Borrower or any other Credit Party; or the Borrower or any other Credit Party commences any other proceeding under any reorganization, arrangement, adjustment of debt, relief of debtors, dissolution, insolvency or liquidation or similar law of any jurisdiction whether now or hereafter in effect relating to the Borrower or any other Credit Party; or there is commenced against the Borrower or any other Credit Party any such case or proceeding which remains undismissed

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for a period of 60 days; or the Borrower or any other Credit Party is adjudicated insolvent or bankrupt; or any order of relief or other order approving any such case or proceeding is entered; the Borrower or any other Credit Party suffers any appointment of any custodian or the like for it or any substantial part of its property to continue undischarged or unstayed for a period of 60 days; or the Borrower or any other Credit Party makes a general assignment for the benefit of creditors; or any corporate action is taken by the Borrower or any other Credit Party for the purpose of effecting any of the foregoing; or

9.06 Guaranty. The Guaranty or any provision thereof shall cease to be in full force and effect, or any Guarantor or any Person acting by or on behalf of such Guarantor shall deny or disaffirm all or any portion of such Guarantor's obligation thereunder, or any Guarantor shall default in the observance of any term, covenant or agreement on its part to be performed or observed pursuant thereto and such default (other than any default arising from a failure to make any payment thereunder) shall continue unremedied for a period of at least 30 days after notice to the Borrower by the Administrative Agent or the Required Banks; or

9.07 Judgments. One or more judgments or decrees shall be entered against the Borrower or any Subsidiary involving a liability of $10,000,000 or more in the aggregate for all such judgments and decrees for the Borrower and the other Credit Parties (not paid or to the extent not covered by insurance) and any such judgments or decrees shall not have been vacated, discharged or stayed or bonded pending appeal within 60 days from the entry thereof; or

9.08 Employee Benefit Plans. Each of the following shall occur:
(a)(i) A contribution required to be made with respect to any (x) employee pension benefit plan (as defined in Section 3(2) of ERISA) maintained or contributed to by (or to which there is an obligation to contribute of) the Borrower or a Subsidiary or an ERISA Affiliate or (y) Foreign Pension Plan has not been timely made or (ii) the Borrower or any Subsidiary has incurred or is likely to incur liabilities pursuant to one or more employee welfare benefit plans (as defined in Section 3(1) of ERISA) that provide benefits to retired employees or other former employees (other than as required by Section 601 of ERISA) or employee pension benefit plans (as defined in Section 3(2) of ERISA); and (b) there shall result from any such event or events the imposition of a Lien, the granting of a security interest, or a liability or a material risk of incurring a liability; and (c) which Lien, security interest or liability, individually, and/or in the aggregate, in the opinion of the Required Banks, will have a Material Adverse Effect;

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9.09 Change of Control. Any Change of Control shall occur; then, and in any such event, and at any time thereafter, if any Event of Default shall then be continuing, the Administrative Agent shall, upon the written request of the Required Banks, by written notice to the Borrower, take any or all of the following actions, without prejudice to the rights of the Administrative Agent or any Bank to enforce its claims against the Borrower, except as otherwise specifically provided for in this Agreement (provided that, if an Event of Default specified in Section 9.05 shall occur with respect to the Borrower or any Subsidiary, the result which would occur upon the giving of written notice by the Administrative Agent as specified in clauses (i) and (ii) below shall occur automatically without the giving of any such notice): (i) declare the Total Commitment terminated, whereupon the Commitment of each Bank shall forthwith terminate immediately and any Commitment Commission shall forthwith become due and payable without any other notice of any kind; (ii) declare the principal of and any accrued interest in respect of all Loans and all obligations owing hereunder (including Unpaid Drawings) and thereunder to be, whereupon the same shall become, forthwith due and payable without presentment, demand, protest or other notice of any kind, all of which are hereby waived by the Borrower; (iii) terminate any Letter of Credit which may be terminated in accordance with its terms; (iv) direct the Borrower to pay (and the Borrower hereby agrees upon receipt of such notice, or upon the occurrence of any Event of Default specified in Section 9.05 in respect of the Borrower, it will pay) to the Administrative Agent at the Payment Office such additional amounts of cash, to be held as security for the Borrower's reimbursement obligations in respect of Letters of Credit then outstanding equal to the aggregate Stated Amount of all Letters of Credit then outstanding; and (v) apply any amounts held as cash collateral pursuant to Section 4.02 or this Section 9 to repay Obligations.

SECTION 10. Definitions. As used herein, the following terms shall have the meanings herein specified unless the context otherwise requires. Defined terms in this Agreement shall include in the singular number the plural and in the plural the singular:

"Adjusted Commitment" for each Non-Defaulting Bank shall mean at any time the product of such Bank's Adjusted Percentage and the Adjusted Total Commitment.

"Adjusted Consolidated EBITDA" shall mean for any period Consolidated EBITDA for such period, less cash Dividends and cash taxes paid during such period, plus cash payments for the repurchase of common stock made pursuant to Section 8.05(a) and (b).

"Adjusted Percentage" shall mean (x) at a time when no Bank Default exists, for each Bank such Bank's Percentage and (y) at a time when a Bank Default exists (i) for each Bank that is a Defaulting Bank, zero and (ii) for each Bank that is a Non-Defaulting Bank, the percentage determined by dividing such Bank's Commitment at such time by the Adjusted Total Commitment at such time, it being understood that all references herein to Commitments and the Adjusted Total Commitment at a time when the Total Commitment or Adjusted Total Commitment, as the case may be, has been terminated shall be references to

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the Commitments or Adjusted Total Commitment, as the case may be, in effect immediately prior to such termination, provided that (A) no Bank's Adjusted Percentage shall change upon the occurrence of a Bank Default from that in effect immediately prior to such Bank Default if, after giving effect to such Bank Default and any repayment of Loans at such time pursuant to Section 4.02(A)(a) or otherwise, the sum of (i) the aggregate outstanding principal amount of Loans of all Non-Defaulting Banks plus (ii) the Letter of Credit Outstandings, exceeds the Adjusted Total Commitment; (B) the changes to the Adjusted Percentage that would have become effective upon the occurrence of a Bank Default but that did not become effective as a result of the preceding clause (A) shall become effective on the first date after the occurrence of the relevant Bank Default on which the sum of (i) the aggregate outstanding principal amount of the Loans of all Non-Defaulting Banks plus (ii) the Letter of Credit Outstandings is equal to or less than the Adjusted Total Commitment; and (C) if (i) a Non-Defaulting Bank's Adjusted Percentage is changed pursuant to the preceding clause (B) and (ii) any repayment of such Bank's Loans, or of Unpaid Drawings with respect to Letters of Credit, that were made during the period commencing after the date of the relevant Bank Default and ending on the date of such change to its Adjusted Percentage must be returned to the Borrower as a preferential or similar payment in any bankruptcy or similar proceeding of the Borrower, then the change to such Non-Defaulting Bank's Adjusted Percentage effected pursuant to said clause (B) shall be reduced to that positive change, if any, as would have been made to its Adjusted Percentage if (x) such repayments had not been made and (y) the maximum change to its Adjusted Percentage would have resulted in the sum of the outstanding principal of Loans made by such Bank plus such Bank's new Adjusted Percentage of the outstanding principal amount of Letter of Credit Outstandings equalling such Bank's Commitment at such time.

"Adjusted Total Commitment" shall mean at any time the Total Commitment less the aggregate Commitments of all Defaulting Banks.

"Administrative Agent" shall have the meaning provided in the first paragraph of this Agreement and shall include any successor to the Administrative Agent appointed pursuant to Section 11.09.

"Affected Eurodollar Loan" shall have the meaning provided in
Section 4.02(B).

"Affiliate" shall mean, with respect to any Person, any other Person directly or indirectly controlling (including but not limited to all directors and officers of such Person), controlled by, or under direct or indirect common control with such Person. A Person shall be deemed to control a corporation if such Person possesses, directly or indirectly, the power (i) to vote 10% or more of the securities having ordinary voting power for the election of directors of such corporation or (ii) to direct or cause the direction of the

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management and policies of such corporation, whether through the ownership of voting securities, by contract or otherwise.

"Agreement" shall mean this Credit Agreement, as the same may be from time to time further modified, amended and/or supplemented.

"Applicable Commitment Commission Percentage" shall be (i) at all times during which the Borrower's Credit Rating falls in category 1, 2 or 3, equal to the percentage per annum set forth below opposite the Borrowers' applicable Credit Rating:

                                           Applicable Commitment
Credit Rating                              Commission Percentage
-------------                              ----------------------
Category 1                                 0.100% per annum

Category 2                                 0.125% per annum

Category 3                                 0.150% per annum

and (ii) at all times during which the Borrowers Credit Rating falls in category 4, the percentage per annum set forth below opposite the Borrower's then applicable Pricing Ratio:

                                           Applicable Commitment
   Pricing Ratio                           Commissions Percentage
   -------------                           ----------------------
Less than 1.00:1.00                        0.175% per annum

Greater than or equal to
1.00:1.00 and less than 1.75:1             0.200% per annum

Greater than or equal
to 1.75:1.00                               0.250% per annum

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"Applicable Eurodollar Margin" shall be equal to (i) at all times during which the Borrower's Credit Rating falls in category 1, 2 or 3, the percentage per annum set forth below opposite the Borrowers' applicable Credit Rating:

                                               Applicable
Credit Rating                              Eurodollar Margin
-------------                              -----------------
Category 1                                 0.350% per annum

Category 2                                 0.400% per annum

Category 3                                 0.450% per annum

and (ii) at all times during which the Borrowers Credit Rating falls in category 4, the percentage per annum set forth below opposite the Borrower's then applicable Pricing Ratio:

                                               Applicable
   Pricing Ratio                           Eurodollar Margin
   -------------                           -----------------
Less than 1.00:1.00                        0.500% per annum

Greater than or equal to
1.00:1.00 and less than
1.75:1                                     0.700% per annum

Greater than or equal
to 1.75:1.00                               0.900% per annum

"Approved Bank" shall have the meaning provided in the definition of "Cash Equivalents."

"Approved Company" shall have the meaning provided in the definition of "Cash Equivalents."

"Approved Rig Broker" shall mean each of the international, independent, sale-and-purchase brokers of offshore drilling rigs listed on Annex X, as such Annex may be revised from time to time at the request of the Required Banks with the consent of the Borrower, which consent shall not be unreasonably withheld.

"Assignment and Assumption Agreement" shall mean the Assignment and Assumption Agreement substantially in the form of Exhibit I (appropriately completed).

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"Authorized Officer" shall mean any senior officer of the Borrower designated as such in writing to the Administrative Agent by the Borrower.

"Available Unutilized Commitment" for each Bank, shall mean the excess of (i) the Commitment of such Bank over (ii) the sum of (x) the aggregate outstanding principal amount of Loans made by such Bank plus (y) an amount equal to such Bank's Adjusted Percentage of the Letter of Credit Outstandings at such time.

"Available Unutilized Total Commitment" shall mean the excess of
(i) the Total Commitment over (ii) the sum of (x) the aggregate outstanding principal amount of Loans plus (y) the Letter of Credit Outstandings at such time.

"Bank" shall have the meaning provided in the first paragraph of this Agreement.

"Bank Default" shall mean (i) the refusal (which has not been retracted) of a Bank to make available its portion of any incurrence of Loans or to fund its portion of any unreimbursed payment under Section 2.05(c) or
(ii) a Bank having notified the Administrative Agent and/or the Borrower that it does not intend to comply with the obligations under Section 1.01 or under
Section 2.05(c), in the case of either (i) or (ii) as a result of the appointment of a receiver or conservator with respect to such Bank at the direction or request of any regulatory agency or authority.

"Bankruptcy Code" shall have the meaning provided in Section 9.05.

"Base Rate" at any time shall mean the higher of, (i) the rate which is 1/2 of 1% in excess of the Federal Funds Effective Rate, and (ii) the Prime Lending Rate.

"Base Rate Loan" shall mean each Loan bearing interest at the rates provided in Section 1.08(a).

"Borrower" shall have the meaning provided in the first paragraph of this Agreement.

"Borrowing" shall mean the incurrence of one Type of Loan pursuant to the Facility by the Borrower from all of the Banks with respect to such Facility on a pro rata basis on a given date (or resulting from conversions on a given date), having in the case of Eurodollar Loans the same Interest Period; provided that Base Rate Loans incurred pursuant to Section 1.10(b) shall be considered part of any related Borrowing of Eurodollar Loans.

"Business Day" shall mean (i) for all purposes other than as covered by clause (ii) below, any day excluding Saturday, Sunday and any day which shall be in the City of New York a legal holiday or a day on which banking institutions are authorized by law or

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other governmental actions to close and (ii) with respect to all notices and determinations in connection with, and payments of principal and interest on, Eurodollar Loans, any day which is a Business Day described in clause (i) and which is also a day for trading by and between banks in U.S. dollar deposits in the interbank Eurodollar market.

"Capital Lease" as applied to any Person shall mean any lease of any property (whether real, personal or mixed) by that Person as lessee which, in conformity with GAAP, is accounted for as a capital lease on the balance sheet of that Person.

"Capitalized Lease Obligations" shall mean all obligations under Capital Leases of the Borrower or any of its Subsidiaries in each case taken at the amount thereof accounted for as liabilities in accordance with GAAP.

"Cash Equivalents" shall mean (i) securities issued or directly and fully guaranteed or insured by the United States of America or any agency or instrumentality thereof (provided that the full faith and credit of the United States of America is pledged in support thereof) having maturities of not more than four years from the date of acquisition, or repurchase obligations with respect thereto, (ii) U.S. dollar denominated time deposits, certificates of deposit, bankers' acceptances and Eurocurrency deposits of (x) any Bank, (y) any domestic commercial bank of recognized standing having capital and surplus in excess of $100,000,000 or (z) any bank (or the parent company of such bank) whose short-term commercial paper rating from Standard & Poor's Corporation ("S&P") is at least A-1 or the equivalent thereof or from Moody's Investors Service, Inc. ("Moody's") is at least P-1 or the equivalent thereof (any such bank, an "Approved Bank"), in each case with maturities of not more than one year from the date of acquisition, (iii) repurchase obligations with a term of not more than seven days for underlying securities of the types described in clause (i) above entered into with any bank meeting the qualifications specified in clause (ii) above, (iv) commercial paper issued by any Bank or Approved Bank or by the parent company of any Bank or Approved Bank and commercial paper issued by, or guaranteed by, any corporation with a short-term commercial paper rating of at least A-1 or the equivalent thereof by S&P or at least P-1 or the equivalent thereof by Moody's (any such company, an "Approved Company"), or guaranteed by any industrial company with a long term unsecured debt rating of at least A or A2, or the equivalent of each thereof, from S&P or Moody's, as the case may be, and in each case maturing within one year after the date of acquisition and (v) investments in money market mutual funds having assets in excess of $100,000,000.

"Cash Proceeds" shall mean, with respect to any Fleet Rig Disposition, the aggregate cash payments (including any cash received by way of deferred payment pursuant to a note receivable issued in connection with such Fleet Rig Disposition, other than the portion of such deferred payment constituting interest, but only as and when so received) received by the Borrower and/or any Subsidiary from such Fleet Rig Disposition.

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"CBK" shall mean Christiania Bank og Kreditkasse ASA, New York Branch, in its individual capacity.

"CERCLA" shall mean the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended, 42 U.S.C. Section 9601 et seq.

"Change of Control" shall mean (a) any "person" (as such term is used in Sections 13(d) and 14(d) of the Exchange Act), is or becomes the beneficial owner (as defined in Rules 13d-3 and 13d-5 under the Exchange Act), directly or indirectly, of more than 50% of the total voting power of the Voting Stock of the Borrower or (b) during any period of two consecutive years individuals who at the beginning of such period constituted the Board of Directors of the Borrower (together with any new directors whose election by such Board of Directors or whose nomination for election by the stockholders of the Borrower was approved by a vote of a majority of the directors of the Borrower then still in office who were either directors at the beginning of such period or whose election or nomination for election was previously so approved) cease for any reason to constitute a majority of the Board of Directors of the Borrower then in office.

"Claims" shall have the meaning provided in the definition of "Environmental Claims."

"Code" shall mean the Internal Revenue Code of 1986, as amended from time to time and the regulations promulgated and the rulings issued thereunder. Section references to the Code are to the Code, as in effect on the Effective Date and any subsequent provisions of the Code, amendatory thereof, supplemental thereto or substituted therefor.

"Commitment" shall mean, with respect to each Bank, the amount set forth opposite such Bank's name in Annex I directly below the column entitled "Commitment," as the same may be (x) reduced from time to time pursuant to Sections 3.02, 3.03 and/or 9 or (y) adjusted from time to time as a result of assignments to or from such Bank pursuant to Section 12.04.

"Commitment Commission" shall have the meaning provided in
Section 3.01(a).

"Consolidated EBIT" shall mean, for any period, (A) the sum of the amounts for such period of (i) Consolidated Net Income, (ii) provisions for taxes based on income, (iii) Consolidated Interest Expense, (iv) amortization or write-off of deferred financing costs to the extent deducted in determining Consolidated Net Income and (v) losses on sales of assets (excluding sales in the ordinary course of business) and other extraordinary losses less (B) the amount for such period of gains on sales of assets (excluding sales in the ordinary course of business) and other extraordinary gains, all as determined on a consolidated basis in accordance with GAAP.

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"Consolidated EBITDA" shall mean, for any period, the sum of the amounts for such period of (i) Consolidated EBIT, (ii) depreciation expense of the Borrower and its Subsidiaries and (iii) amortization expense of the Borrower and its Subsidiaries, all as determined on a consolidated basis in accordance with GAAP.

"Consolidated Indebtedness" shall mean, as at any date of determination, the aggregate stated balance sheet amount of all Indebtedness (including the Loans) of the Borrower and its Subsidiaries on a consolidated basis as determined in accordance with GAAP, excluding all Contingent Obligations relating to the Indebtedness of any Person which is included in the calculation of Consolidated Indebtedness of the Borrower and its Subsidiaries.

"Consolidated Interest Expense" shall mean, for any period, total interest expense (including that attributable to Capital Leases) of the Borrower and its Subsidiaries in accordance with GAAP on a consolidated basis with respect to all outstanding Indebtedness of the Borrower and its Subsidiaries.

"Consolidated Net Income" shall mean for any period, the net income (or loss) of the Borrower and its Subsidiaries on a consolidated basis for such period taken as a single accounting period determined in conformity with GAAP.

"Consolidated Net Worth" shall mean, at any time, shareholder's equity of the Borrower and its Subsidiaries on a consolidated basis determined in accordance with GAAP.

"Consolidated Unsecured Indebtedness" shall mean, as at any date of determination, the aggregate stated balance sheet amount of all unsecured Indebtedness (including the Loans) of the Borrower and its Subsidiaries on a consolidated basis as determined in accordance with GAAP, excluding all Contingent Obligations relating to the unsecured Indebtedness of any Person which is included in the calculation of Consolidated Indebtedness of the Borrower and its Subsidiaries.

"Contingent Obligations" shall mean as to any Person any obligation of such Person guaranteeing or intending to guarantee any Indebtedness, leases, dividends or other obligations ("primary obligations") of any other Person (the "primary obligor") in any manner, whether directly or indirectly, including, without limitation, any obligation of such Person, whether or not contingent, (a) to purchase any such primary obligation or any property constituting direct or indirect security therefor, (b) to advance or supply funds (i) for the purchase or payment of any such primary obligation or
(ii) to maintain working capital or equity capital of the primary obligor or otherwise to maintain the net worth or solvency of the primary obligor, (c) to purchase property, securities or services primarily for the purpose of assuring the owner of any such primary obligation of the ability of the primary obligor to make payment of such primary obligation or (d) otherwise to assure or hold harmless the

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owner of such primary obligation against loss in respect thereof, provided, however, that the term Contingent Obligation shall not include endorsements of instruments for deposit or collection in the ordinary course of business. The amount of any Contingent Obligation shall be deemed to be an amount equal to the stated or determinable amount of the primary obligation in respect of which such Contingent Obligation is made or, if not stated or determinable, the maximum reasonably anticipated liability in respect thereof (assuming such Person is required to perform thereunder) as determined by such Person in good faith.

"Credit Documents" shall mean this Agreement, the Notes and each Guaranty and any documents executed in connection therewith.

"Credit Event" shall mean and include the making of a Loan or the issuance of a Letter of Credit.

"Credit Party" shall mean the Borrower and each Guarantor.

"Credit Rating" shall mean the Borrowers credit rating in respect of its senior unsecured long term debt obligations as determined by S&P and Moody's, there being four categories for purposes of this Agreement:

                       S&P Credit Rating             Moody's Credit Rating
                       -----------------             ---------------------
Category 1             BBB+, or higher               Baa1, or higher

Category 2             BBB                           Baa2

Category 3             BBB-                          Baa3

Category 4             lower than BBB-               lower than Baa3

In the event that none of the Borrower's senior unsecured debt is rated by the Rating Agencies, the Borrower shall be deemed to have a category 4 Credit Rating. If only one of a Moody's Credit Rating or an S&P Credit Rating exists at any time, then such Credit Rating shall be utilized. In the event of a split rating of two or more rating levels, the rating level one below the higher rating will apply. In the event that the ratings as determined by S&P and Moody's differ by one rating category, the higher of the two shall apply. In the event that either S&P or Moody's revises its rating system as in effect on the Effective Date, the Borrower's Credit Rating shall be determined based on the rating which is most analogous to the applicable rating set forth above.

If any credit rating shall be downgraded by Moody's or S&P, such change shall be effective for purposes of this definition as of the Business Day on which such change in credit rating is announced by Moody's and/or S&P, as the case may be, provided that nothing herein shall relieve the Borrower of its obligation to notify the Banks of any such change pursuant to

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Section 7.01(j). If any credit rating shall be upgraded by Moody's or S&P, such change shall be effective for purposes of this definition as of the Business Day upon which the Banks receive notice of any such change pursuant to
Section 7.01(j).

"Cumulative Net Income Amount" shall mean on any date of determination, an amount equal to, (i) 50% of Consolidated Net Income (determined on a cumulative basis) for all Cumulative Net Income Periods ending prior to such date of determination for which Consolidated Net Income was a positive number, minus (ii) 100% of Consolidated Net Income (determined on a cumulative basis) for all Cumulative Net Income Periods ending prior to such date of determination for which Consolidated Net Income was a negative number.

"Cumulative Net Income Period" shall mean each period consisting of a fiscal quarter of the Borrower ending after June 30, 1997.

"Default" shall mean any event, act or condition which with notice or lapse of time, or both, would constitute an Event of Default.

"Defaulting Bank" shall mean any Bank with respect to which a Bank Default is in effect.

"Dividends" shall mean to declare or pay on the part of the Borrower or any of its Subsidiaries any dividends (other than dividends payable solely in capital stock of such Person) or return any capital to, its stockholders or authorize or make any other distribution, payment or delivery of property or cash to its stockholders as such, or redeem, retire, purchase or otherwise acquire, directly or indirectly, for a consideration, any shares of any class of its capital stock now or hereafter outstanding (or any warrants for or options or stock appreciation rights in respect of any of such shares), or set aside any funds for any of the foregoing purposes, or permit any of its Subsidiaries to purchase or otherwise acquire for consideration any shares of any class of the capital stock of the Borrower or any other Subsidiary, as the case may be, now or hereafter outstanding (or any options or warrants or stock appreciation rights issued by such Person with respect to its capital stock).

"Dollars" shall mean freely transferable lawful money of the United States.

"Domestic Subsidiary" shall mean, as to any Person, any Subsidiary that is incorporated under the laws of the United States of America, any State thereof or any territory thereof.

"Effective Date" shall have the meaning provided in Section 12.10.

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"Eligible Transferee" shall mean and include a commercial bank, financial institution or other "accredited investor" (as defined by Regulation D of the Securities Act of 1933).

"Environmental Claims" means any and all administrative, regulatory or judicial actions, suits, demands, demand letters, claims, liens, notices of noncompliance or violation, investigations (other than internal reports prepared by the Borrower or any of its Subsidiaries solely in the ordinary course of such Person's business and not in response to any third party action or request of any kind) or proceedings relating in any way to any Environmental Law or any permit issued, or any approval given, under any such Environmental Law (hereafter, "Claims"), including, without limitation, (a) any and all Claims by governmental or regulatory authorities for enforcement, cleanup, removal, response, remedial or other actions or damages pursuant to any applicable Environmental Law, and (b) any and all Claims by any third party seeking damages, contribution, indemnification, cost recovery, compensation or injunctive relief resulting from Hazardous Materials arising from alleged injury or threat of injury to health, safety or the environment.

"Environmental Law" means any applicable Federal, state, foreign or local statute, law, rule, regulation, ordinance, code, guide, policy and rule of common law now or hereafter in effect and in each case as amended, and any judicial or administrative interpretation thereof, including any judicial or administrative order, consent decree or judgment, relating to the environment, or Hazardous Materials, including, without limitation, CERCLA; RCRA; the Federal Water Pollution Control Act, as amended, 33 U.S.C. Section 1251 et seq.; the Toxic Substances Control Act, 15 U.S.C. Section 7401 et seq.; the Clean Air Act, 42 U.S.C. Section 7401 et seq.; the Safe Drinking Water Act, 42 U.S.C. Section 3808 et seq.; the Oil Pollution Act of 1990, 33 U.S.C. Section 2701 et seq. and any applicable state and local or foreign counterparts or equivalents.

"ERISA" shall mean the Employee Retirement Income Security Act of 1974, as amended from time to time, and the regulations promulgated and rulings issued thereunder. Section references to ERISA are to ERISA, as in effect at the Effective Date and any subsequent provisions of ERISA, amendatory thereof, supplemental thereto or substituted therefor.

"ERISA Affiliate" shall mean each person (as defined in Section 3(9) of ERISA) which together with the Borrower or any Subsidiary would be deemed to be a "single employer" (i) within the meaning of Sections 414(b),
(c), (m) and (o) of the Code or (ii) as a result of the Borrower or any Subsidiary being or having been a general partner of such person.

"Eurodollar Loans" shall mean each Loan bearing interest at the rates provided in Section 1.08(b).

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"Eurodollar Rate" shall mean with respect to each Interest Period for a Loan, the offered rate (rounded upward to the nearest 1/16 of one percent) for deposits of Dollars for a period equivalent to such period at or about 11:00 A.M. (London time) on the second London Banking Day before the first day of such period as is displayed on Telerate page 3750 (British Bankers' Association Interest Settlement Rates) (or such other page as may replace such page 3750 on such system or on any other system of the information vendor for the time being designated by the British Bankers' Association to calculate the BBA Interest Settlement Rate (as defined in the British Bankers' Association's Recommended Terms and Conditions ("BBAIRS" terms) dated August 1985)), provided that if on such date no such rate is so displayed, the Eurodollar Rate for such period shall be the rate quoted to the Administrative Agent as the offered rate for deposits of Dollars in an amount approximately equal to the amount in relation to which the Eurodollar Rate is to be determined for a period equivalent to such period by prime banks in the London Interbank Market at or about 11:00 A.M. (London time) on the second Banking Day before the first day of such period.

"Event of Default" shall have the meaning provided in Section 9.

"Existing Indebtedness" shall have the meaning provided in
Section 6.18.

"Existing Indebtedness Agreements" shall have the meaning provided in Section 5.06(i).

"Facility" shall mean the credit facility established under this Agreement, evidenced by the Notes.

"Facing Fee" shall have the meaning provided in Section 3.01(c).

"Federal Funds Effective Rate" shall mean for any period, a fluctuating interest rate equal for each day during such period to the weighted average of the rates on overnight Federal Funds transactions with members of the Federal Reserve System arranged by Federal Funds brokers, as published for such day (or, if such day is not a Business Day, for the next preceding Business Day) by the Federal Reserve Bank of New York, or, if such rate is not so published for any day which is a Business Day, the average of the quotations for such day on such transactions received by the Administrative Agent from three Federal Funds brokers of recognized standing selected by the Administrative Agent.

"Fees" shall mean all amounts payable pursuant to, or referred to in, Section 3.01.

"Fleet" shall mean all Fleet Rigs taken as a whole.

"Fleet Rig" shall mean any offshore drilling rig or vessel wholly-owned from time to time by the Borrower and its Wholly-Owned Subsidiaries.

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"Fleet Rig Disposition" shall mean (i) the sale, transfer or other voluntary disposition (x) by the Borrower or any Guarantor to any Person other than the Borrower or any Guarantor or (y) by any Subsidiary which is not a Guarantor to any Person other than the Borrower or a Subsidiary, of any Fleet Rig of the Borrower or such Subsidiary not subject to a first priority Lien permitted pursuant to Section 8.04(h) or (ii) any Recovery Event arising as a result of a Total Loss.

"Foreign Pension Plan" means any plan, fund (including, without limitation, any superannuation fund) or other similar program established or maintained outside the United States of America by the Borrower or any one or more of its Subsidiaries primarily for the benefit of employees of the Borrower or such Subsidiaries residing outside the United States of America, which plan, fund or other similar program provides, or results in, retirement income, a deferral of income in contemplation of retirement or payments to be made upon termination of employment, and which plan is not subject to ERISA or the Code.

"GAAP" shall mean generally accepted accounting principles in the United States of America as in effect on the date of this Agreement; it being understood and agreed that determinations in accordance with GAAP for purposes of Section 8, including defined terms as used therein, are subject (to the extent provided therein) to Section 12.07(a).

"Guarantor" shall mean each Domestic Subsidiary of the Borrower from time to time party to the Guaranty.

"Guaranty" shall have the meaning provided in Section 5.11.

"Hazardous Materials" means (a) any petroleum or petroleum products, radioactive materials, asbestos in any form that is or could become friable, urea formaldehyde foam insulation, transformers or other equipment that contained electric fluid containing levels of polychlorinated biphenyls, and radon gas; (b) any chemicals, materials or substances defined as or included in the definition of "hazardous substances," "hazardous waste," "hazardous materials," "extremely hazardous waste," "restricted hazardous waste," "toxic substances," "toxic pollutants," "contaminants," or "pollutants," or words of similar import, under any applicable Environmental Law; and (c) any other chemical, material or substance, exposure to which is prohibited, limited or regulated by any governmental authority.

"Indebtedness" of any Person shall mean without duplication (i) all indebtedness of such Person for borrowed money, (ii) the deferred purchase price of assets or services which in accordance with GAAP would be shown on the liability side of the balance sheet of such Person, (iii) the face amount of all letters of credit issued for the account of such Person and, without duplication, all drafts drawn thereunder, (iv) all Indebtedness of a second Person secured by any Lien on any property owned by such first Person, whether or not such indebtedness has been assumed, (v) all Capitalized Lease Obligations of such Person, (vi) all obligations of such Person to pay a specified purchase price for goods or

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services whether or not delivered or accepted, i.e., take-or-pay and similar obligations, (vii) all net obligations of such Person under Interest Rate Agreements and (viii) all Contingent Obligations of such Person (other than Contingent Obligations arising from the guaranty by such Person of Permitted Indebtedness of the Borrower and/or its Subsidiaries) provided that Indebtedness shall not include trade payables and accrued expenses, in each case arising in the ordinary course of business.

"Interest Period" with respect to any Loan shall mean the interest period applicable thereto, as determined pursuant to Section 1.09.

"Interest Rate Agreement" shall mean any interest rate swap agreement, any interest rate cap agreement, any interest rate collar agreement or other similar agreement or arrangement designed to protect the Borrower or any Subsidiary against interest rate risk.

"Investments" shall mean and include (i) lending money or credit or making advances to any Person (net of any repayments or returns thereof),
(ii) purchasing or acquiring any stock, obligations or securities of, or any other interest in, or making capital contributions to any Person, or (iii) guaranteeing the debt or obligations of any other Person.

"Kolskaya" shall mean the offshore drilling vessel "Kolskaya", official no. 8752207.

"Leasehold" of any Person means all of the right, title and interest of such Person as lessee or licensee in, to and under leases or licenses of land, improvements and/or fixtures.

"L/C Supportable Obligations" shall mean such obligations of the Borrower or its Subsidiaries as are not inconsistent with the policies of the Letter of Credit Issuer.

"Letter of Credit" shall have the meaning provided in Section 2.01(a).

"Letter of Credit Fee" shall have the meaning provided in Section 3.01(b).

"Letter of Credit Issuer" shall mean Christiania Bank og Kreditkasse ASA, New York Branch.

"Letter of Credit Outstandings" shall mean, at any time, the sum of, without duplication, (i) the aggregate Stated Amount of all outstanding Letters of Credit and (ii) the aggregate amount of all Unpaid Drawings in respect of all Letters of Credit.

"Letter of Credit Request" shall have the meaning provided in
Section 2.03(a).

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"Leverage Ratio" shall mean, at any date of determination, the ratio of Consolidated Indebtedness on such date to Total Capitalization on such date.

"Lien" shall mean any mortgage, pledge, security interest, security title, encumbrance, lien or charge of any kind (including any agreement to give any of the foregoing, any conditional sale or other title retention agreement or any lease in the nature thereof).

"Loan" shall have the meaning provided in Section 1.01.

"Margin Stock" shall have the meaning provided in Regulation U.

"Market Value" shall mean as of any date of calculation (unless otherwise indicated) the value as of such date of any Fleet Rig provided in the most recent valuation report delivered in connection with Section 5.12(ii) or
Section 7.10.

"Material Adverse Effect" shall mean a material adverse effect on the business, property, assets, liabilities, operations, financial condition or prospects of the Borrower and its Subsidiaries taken as a whole.

"Maturity Date" shall mean the date that is the fifth anniversary of the Effective Date.

"Minimum Borrowing Amount" shall mean (i) for Loans maintained as Base Rate Loans, $1,000,000, and (ii) for Loans maintained as Eurodollar Loans, $5,000,000.

"Moody's" shall mean Moody's Investors Service, Inc. and its successors.

"Moody's Credit Rating" shall mean the rating level (it being understood that a rating level shall include numerical modifiers and (+) and (- ) modifiers) assigned by Moody's to the senior unsecured long term debt of the Borrower.

"Muravlenko" shall mean the offshore drilling vessel "Muravlenko", official no. 7907178.

"Net Cash Proceeds" shall mean, with respect to any Fleet Rig Disposition, the Cash Proceeds resulting therefrom net of expenses of sale or disposition and net of taxes payable as a result thereof.

"9-1/4% Senior Note Indenture" shall mean the Indenture, dated as of October 1, 1993, among the Borrower and Texas Commerce Bank National Association, as Trustee, governing the 9-1/4%% Senior Notes, as supplemented by the First Supplemental

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Indenture dated as of May 30, 1997, as the same may be amended, modified, restated or supplemented from time to time in accordance with the provisions thereof and hereof.

"9-1/4% Senior Notes" shall mean the Borrower's 9-1/4% Senior Notes due 2003 issued pursuant to the 9-1/4% Senior Note Indenture.

"9-1/8% Senior Note Indenture" shall mean the Indenture, dated as of July 1, 1996 between the Borrower and Texas Commerce Bank National Association, as Trustee, governing the 9-1/8% Senior Notes, as the same may be amended, modified, restated or supplemented from time to time in accordance with the provisions thereof and hereof.

"9-1/8% Senior Notes" shall mean the Borrower's 9-1/8% Senior Notes due 2006 issued pursuant to the 9-1/8% Senior Note Indenture.

"Non-Defaulting Bank" shall mean each Bank other than a Defaulting Bank.

"Note" shall have the meaning provided in Section 1.05(a).

"Notice of Borrowing" shall have the meaning provided in Section 1.03.

"Notice of Conversion" shall have the meaning provided in Section 1.06.

"Notice Office" shall mean the office of the Administrative Agent at 11 West 42nd Street, New York, New York or such other office as the Administrative Agent may designate to the Borrower from time to time.

"Obligations" shall mean all amounts, direct or indirect, contingent or absolute, of every type or description, and at any time existing, owing to the Administrative Agent or any Bank pursuant to the terms of this Agreement or any other Credit Document.

"Participant" shall have the meaning provided in Section 2.05(a).

"Payment Office" shall mean the office of the Administrative Agent at 11 West 42nd Street, New York, New York or such other office as the Administrative Agent may designate to the Borrower from time to time.

"Percentage" shall mean for each Bank the percentage obtained by dividing such Bank's Commitment by the Total Commitment, provided that if the Total Commitment has been terminated, the Percentage of each Bank shall be determined by dividing such Bank's Commitment immediately prior to such termination by the Total Commitment immediately prior to such termination.

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"Permitted Indebtedness" shall mean Indebtedness described in
Section 8.03 (a) through (h).

"Permitted Investments" shall mean and include the following:

(a) the Borrower or any Subsidiary may make Investments in cash and Cash Equivalents;

(b) the Borrower and any Subsidiary may acquire and hold receivables owing to them, if created or acquired in the ordinary course of business and payable or dischargeable in accordance with customary trade terms;

(c) the Borrower and its Subsidiaries may make loans and advances (i) to employees in the ordinary course of business or in connection with employee relocation in an aggregate principal amount not to exceed $500,000 at any time outstanding and (ii) to management employees to finance their purchases of common stock of the Borrower in an aggregate amount not to exceed $750,000 at any time outstanding;

(d) the Borrower and each Subsidiary may acquire and own investments (including debt obligations) received in connection with the bankruptcy or reorganization of suppliers and customers and in settlement of delinquent obligations of, and other disputes with, customers and suppliers arising in the ordinary course of business;

(e) the Borrower may hold treasury stock received by it in connection with the repurchase of stock from employees pursuant to
Section 8.05;

(f) the Borrower may make contributions to an employee stock ownership plan provided such contributions are made solely in the form of the Borrower's common stock;

(g) the Borrower and its subsidiaries may make intercompany loans permitted by Section 8.03(c);

(h) the Borrower and any Subsidiary may make Investments in Guarantors and Persons which, after giving effect to such Investments, become Guarantors;

(i) the Borrower and any Subsidiary may collectively maintain a 41% interest in Arktik Drilling Company, Ltd., provided such Investment does not exceed $15,000,000 in the aggregate;

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(j) the Borrower and its Subsidiaries may lend (A) up to $20,000,000 in the aggregate to any Subsidiary for the purpose of financing capital improvements to the Muravlenko and (B) up to $20,000,000 in the aggregate to any Subsidiary for the purpose of financing improvements to the Kolskaya; provided that such loans shall mature and the principal amount thereof shall be repaid or converted into investments permitted by preceding clause (i) not later than (x) in the case of clause (A) above, December 31, 1997 and (y) in the case of clause (B) above, December 31, 1998.

(k) the Borrower and any Subsidiary may invest in other non Wholly-Owned Subsidiaries and joint ventures, provided that such Investments do not exceed in the aggregate 10% of Consolidated Net Worth;

(l) the Borrower and its Subsidiaries may maintain Investments existing on the Effective Date in foreign Subsidiaries, without giving effect to any increases in the amount thereof;

(m) the Borrower and any Subsidiary may make investments in Persons to the extent that such investments shall be made solely with the capital stock of the Borrower.

"Permitted Liens" shall mean Liens described in Section 8.04(a) through (i).

"Person" shall mean any individual, partnership, joint venture, firm, corporation, association, limited liability company, trust or other enterprise or any government or political subdivision or any agency, department or instrumentality thereof.

"Plan" shall mean any multiemployer or single-employer plan as defined in Section 4001 of ERISA, which is maintained or contributed to by (or to which there is an obligation to contribute of) the Borrower or a Subsidiary of the Borrower or an ERISA Affiliate.

"Pricing Ratio" shall mean, at any date of determination, the ratio of Consolidated Indebtedness on such date to EBITDA for the four consecutive fiscal quarters then last ended.

"Prime Lending Rate" shall mean the rate which CBK announces from time to time as its prime lending rate, the Prime Lending Rate to change when and as such prime lending rate changes. The Prime Lending Rate is a reference rate and does not necessarily represent the lowest or best rate actually charged to any customer. CBK may make commercial loans or other loans at rates of interest at, above or below the Prime Lending Rate.

"Project Finance Indebtedness" shall mean any Indebtedness the proceeds of which will be used solely to make capital expenditures to construct, repair, refurbish, upgrade or improve one or more Fleet Rigs owned or acquired (or to be owned or acquired)

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by the Borrower and any Subsidiary, provided that such Indebtedness shall only be incurred by one or more Project Finance Subsidiaries of the Borrower.

"Project Finance Subsidiary" shall mean a special purpose Subsidiary of the Borrower whose only material assets are Fleet Rigs pledged pursuant to Section 8.04(h) in support of Project Finance Indebtedness, provided that (i) the Indebtedness of such Subsidiary shall not be guaranteed by any other Subsidiary or, except in the case of Project Finance Indebtedness, the Borrower and (ii) such Subsidiary shall be a Project Finance Subsidiary for purposes of this definition only for so long as such Project Finance Indebtedness of such Subsidiary remains outstanding.

"Projections" shall mean detailed consolidated financial projections (including, but not limited to, forecasted statements of net income, cash flow, balance sheets and financial covenants), for the Borrower and its Subsidiaries to be delivered pursuant to Sections 5.14 and 7.01(e).

"Purchase Money Indebtedness" shall mean purchase money Indebtedness not in excess of the purchase price of the asset acquired therewith, which may be secured only with such acquired asset.

"Rating Agencies" shall mean each of Moody's and S&P.

"RCRA" shall mean the Resource Conservation and Recovery Act, as amended, 42 U.S.C. Section 6901 et seq.

"Real Property" of any Person shall mean all of the right, title and interest of such Person in and to land, improvements and fixtures, including Leaseholds.

"Recovery Event" shall mean the receipt by the Borrower or any of its Subsidiaries of any cash insurance proceeds or condemnation award (excluding the proceeds of any business interruption insurance) payable (i) by reason of theft, loss, physical destruction or damage or any other similar event with respect to any property or asset of the Borrower or any of its Subsidiaries or (ii) by reason of any condemnation, taking, seizing or similar event with respect to any property or asset of the Borrower or any of its Subsidiaries.

"Register" shall have the meaning provided in Section 12.16.

"Regulation D" shall mean Regulation D of the Board of Governors of the Federal Reserve System as from time to time in effect and any successor to all or a portion thereof establishing reserve requirements.

"Regulation U" shall mean Regulation U of the Board of Governors of the Federal Reserve System as from time to time in effect and any successor to all or a portion thereof establishing margin requirements.

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"Replaced Bank" shall have the meaning provided in Section 1.13.

"Replacement Bank" shall have the meaning provided in Section 1.13.

"Required Banks" shall mean Non-Defaulting Banks whose outstanding Commitments (or, if after the Total Commitment has been terminated, outstanding Loans and Adjusted Percentage of Letter of Credit Outstandings) constitute greater than 50% of the sum of the Adjusted Total Commitment (or, if after the Total Commitment has been terminated, the total outstanding Loans of Non-Defaulting Banks and the aggregate Adjusted Percentages of all Non- Defaulting Banks of the total Letter of Credit Outstandings at such time).

"Restricted Payments" shall mean any Dividend or Investment, other than Permitted Investments.

"S&P" shall mean Standard & Poor's Ratings Group and its successors.

"S&P Credit Rating" shall mean the rating level (it being understood that a rating level shall include numerical modifiers and (+) and (- ) modifiers) assigned by S&P to the senior unsecured long-term debt of the Borrower.

"SEC" shall mean the Securities and Exchange Commission or any successor thereto.

"Section 4.04(b)(ii) Certificate" shall have the meaning provided in Section 4.04(b)(ii).

"Senior Indebtedness" shall mean Indebtedness of the Borrower or any of its Subsidiaries which ranks pari-passu in repayment priority with Indebtedness of the Borrower and the Guarantors under the Facility.

"Small Scale Field Development" shall mean field development activities which involve an aggregate field cost to the Borrower and its Subsidiaries for all such fields not to exceed $50,000,000.

"Standby Letter of Credit" shall have the meaning provided in
Section 2.01(a).

"Stated Amount" of each Letter of Credit shall mean the maximum available to be drawn thereunder (regardless of whether any conditions for drawing could then be met).

"Submersible Fleet Rigs" shall mean and include each of the following submersible Fleet Rigs owned on the Effective Date: Amos Runner (official no. CG000268), Jim Thompson (official no. CG000245), Max Smith (official no. CG027797), Joe Alford

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(official no. 652439), Lester Pettus (official no. 650227), Fri Rodli (official no. CG000082), Paul Wolff (official no. CG000108) and Paul Romano (official no. CG000103).

"Subsidiary" of any Person shall mean and include (i) any corporation more than 50% of whose stock of any class or classes having by the terms thereof ordinary voting power to elect a majority of the directors of such corporation (irrespective of whether or not at the time stock of any class or classes of such corporation shall have or might have voting power by reason of the happening of any contingency) is at the time owned by such Person directly or indirectly through Subsidiaries and (ii) any partnership, association, joint venture, a limited liability company or other entity in which such Person directly or indirectly through Subsidiaries, has more than a 50% equity interest at the time. Unless otherwise expressly provided, all references herein to "Subsidiary" shall mean a Subsidiary of the Borrower.

"Taxes" shall have the meaning provided in Section 4.04(a).

"Total Capitalization" shall mean, at any time, the sum of Consolidated Indebtedness and Consolidated Net Worth at such time.

"Total Commitment" shall mean, at any time, the sum of the Commitments of each of the Banks.

"Total Loss" shall mean (i) the actual, constructive, arranged, agreed, or compromised total loss of any Unencumbered Fleet Rig; (ii) the requisition for title or other compulsory acquisition or forfeiture of any Unencumbered Fleet Rig otherwise than by requisition for hire; (iii) the capture, seizure, arrest, detention or confiscation of any Unencumbered Fleet Rig by any government or by persons acting or purporting to act on behalf of any government unless such Unencumbered Fleet Rig is released from such capture, seizure, arrest or detention within 60 days after the occurrence thereof.

"Total Unutilized Commitment" shall mean, at any time, (i) the Total Commitment at such time less (ii) the sum of the aggregate principal amount of all Loans at such time plus the Letter of Credit Outstandings at such time.

"Trade Letter of Credit" shall have the meaning provided in
Section 2.01(a).

"Transamerica Financing" shall mean the insurance financing provided to the Borrower by Transamerica, or another nationally recognized insurance company, so long as such financing is provided on substantially the same terms as in effect on the Effective Date.

"Triton" shall mean Triton Engineering Services Company, a Texas corporation.

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"Triton Financing" shall mean the line of credit issued by Southwest Bank of Texas in favor of Triton, as the same may be extended on substantially the same terms as in effect on the Effective Date.

"Type" shall mean any type of Loan determined with respect to the interest option applicable thereto, i.e., a Base Rate Loan or Eurodollar Loan.

"UCC" shall mean the Uniform Commercial Code.

"Unencumbered Fleet Rig" shall mean each Fleet Rig which is not subject to a first priority Lien permitted pursuant to Section 8.04.

"Unpaid Drawing" shall have the meaning provided in Section 2.04(a).

"Voting Stock" shall mean, with respect to any corporation, the outstanding stock of all classes (or equivalent interests) which ordinarily, in the absence of contingencies, entitles holders thereof to vote for the election of directors (or Persons performing similar functions) of such corporation, even though the right so to vote has been suspended by the happening of such a contingency.

"Wholly-Owned Domestic Subsidiary" of any Person shall mean each Wholly-Owned Subsidiary which is organized under the laws of the United States of America, any state thereof or any territory thereof.

"Wholly-Owned Subsidiary" of any Person shall mean any Subsidiary of such Person to the extent all of the capital stock or other ownership interests in such Subsidiary, other than directors' qualifying shares, is owned directly or indirectly by such Person.

"Written" or "in writing" shall mean any form of written communication or a communication by means of telex or facsimile transmission.

SECTION 11. The Administrative Agent.

11.01 Appointment. The Banks hereby designate Christiania Bank og Kreditkasse ASA, New York Branch as Administrative Agent to act as specified herein and in the other Credit Documents. Each Bank hereby irrevocably authorizes, and each holder of any Note by the acceptance of such Note shall be deemed irrevocably to authorize, the Administrative Agent to take such action on its behalf under the provisions of this Agreement, the other Credit Documents and any other instruments and agreements referred to herein or therein and to exercise such powers and to perform such duties hereunder and thereunder as are specifically delegated to or required of the Administrative Agent by the terms hereof and thereof and such other powers as are reasonably incidental thereto. The Administrative Agent may perform any of its duties hereunder by or through its respective officers, directors, agents, employees or Affiliates.

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11.02 Nature of Duties. The Administrative Agent shall not have any duties or responsibilities except those expressly set forth in this Agreement and the other Credit Documents. Neither the Administrative Agent nor any of its respective officers, directors, agents, employees or Affiliates shall be liable for any action taken or omitted by it or them hereunder or under any other Credit Document or in connection herewith or therewith, unless caused by its or their gross negligence or willful misconduct. The duties of the Administrative Agent shall be mechanical and administrative in nature; the Administrative Agent shall not have by reason of this Agreement or any other Credit Document a fiduciary relationship in respect of any Bank or the holder of any Note; and nothing in this Agreement or any other Credit Document, expressed or implied, is intended to or shall be so construed as to impose upon the Administrative Agent any obligations in respect of this Agreement or any other Credit Document except as expressly set forth herein or therein.

11.03 Lack of Reliance on the Administrative Agent. Independently and without reliance upon the Administrative Agent, each Bank and the holder of each Note, to the extent it deems appropriate, has made and shall continue to make (i) its own independent investigation of the financial condition and affairs of the Borrower and its Subsidiaries in connection with the making and the continuance of the Loans and issuance and/or participation in Letters of Credit and the taking or not taking of any action in connection herewith and (ii) its own appraisal of the creditworthiness of the Borrower and its Subsidiaries and, except as expressly provided in this Agreement, the Administrative Agent shall not have any duty or responsibility, either initially or on a continuing basis, to provide any Bank or the holder of any Note with any credit or other information with respect thereto, whether coming into its possession before the making of the Loans or at any time or times thereafter. The Administrative Agent shall not be responsible to any Bank or the holder of any Note for any recitals, statements, information, representations or warranties herein or in any document, certificate or other writing delivered in connection herewith or for the execution, effectiveness, genuineness, validity, enforceability, perfection, collectibility, priority or sufficiency of this Agreement or any other Credit Document or the financial condition of the Borrower and its Subsidiaries or be required to make any inquiry concerning either the performance or observance of any of the terms, provisions or conditions of this Agreement or any other Credit Document, or the financial condition of the Borrower and its Subsidiaries or the existence or possible existence of any Default or Event of Default.

11.04 Certain Rights of the Administrative Agent. If the Administrative Agent shall request instructions from the Required Banks with respect to any act or action (including failure to act) in connection with this Agreement or any other Credit Document, the Administrative Agent shall be entitled to refrain from such act or taking such action unless and until the Administrative Agent shall have received instructions from the Required Banks; and the Administrative Agent shall not incur liability to any Person by reason of so refraining. Without limiting the foregoing, neither any Bank nor the holder of any Note shall have any right of action whatsoever against the Administrative Agent as a result of the Administrative Agent acting or refraining from acting hereunder or under any other Credit Document in accordance with the instructions of the Required Banks.

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11.05 Reliance. The Administrative Agent shall be entitled to rely, and shall be fully protected in relying, upon any note, writing, resolution, notice, statement, certificate, telex, teletype or telecopier message, cablegram, radiogram, order or other document or telephone message signed, sent or made by any Person that the Administrative Agent believed to be the proper Person, including, without limitation, counsel to the Borrower and its Subsidiaries, and, with respect to all legal matters pertaining to this Agreement and any other Credit Document and its duties hereunder and thereunder, upon advice and statements of legal counsel.

11.06 Indemnification. To the extent the Administrative Agent is not reimbursed and indemnified by the Borrower, the Banks will reimburse and indemnify the Administrative Agent, in proportion to their respective "percentages" as used in determining the Required Banks, for and against any and all liabilities, obligations, losses, damages, penalties, claims, actions, judgments, costs, expenses or disbursements of whatsoever kind or nature which may be imposed on, asserted against or incurred by the Administrative Agent in performing its respective duties hereunder or under any other Credit Document, in any way relating to or arising out of this Agreement or any other Credit Document; provided that no Bank shall be liable for any portion of such liabilities, obligations, losses, damages, penalties, actions, judgments, suits, costs, expenses or disbursements resulting from the Administrative Agent's gross negligence or willful misconduct.

11.07 The Administrative Agent in Its Individual Capacity. With respect to its obligation to make Loans under this Agreement, the Administrative Agent shall have the rights and powers specified herein for a "Bank" and may exercise the same rights and powers as though it were not performing the duties specified herein; and the term "Banks," "Required Banks," "holders of Notes" or any similar terms shall, unless the context clearly otherwise indicates, include the Administrative Agent in its individual capacity. The Administrative Agent may accept deposits from, lend money to, and generally engage in any kind of banking, trust or other business with the Borrower or its Subsidiaries or any Affiliate thereof as if it were not performing the duties specified herein, and may accept fees and other consideration from the Borrower or any of its Subsidiaries for services in connection with this Agreement and otherwise without having to account for the same to the Banks.

11.08 Holders. The Administrative Agent may deem and treat the payee of any Note as the owner thereof for all purposes hereof unless and until a written notice of the assignment, transfer or endorsement thereof, as the case may be, shall have been filed with the Administrative Agent. Any request, authority or consent of any Person who, at the time of making such request or giving such authority or consent, is the holder of any Note shall be conclusive and binding on any subsequent holder, transferee, assignee or indorsee, as the case may be, of such Note or of any Note or Notes issued in exchange therefor.

11.09 Resignation by the Administrative Agent. (a) The Administrative Agent may resign from the performance of all its functions and duties hereunder and/or under the other Credit Documents at any time by giving 15 Business Days' prior written notice to

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the Borrower and the Banks. Such resignation shall take effect upon the appointment of a successor Administrative Agent pursuant to clauses (b) and (c) below or as otherwise provided below.

(b) Upon any such notice of resignation, the Required Banks shall appoint a successor Administrative Agent hereunder or thereunder who shall be a commercial bank or trust company reasonably acceptable to the Borrower.

(c) If a successor Administrative Agent shall not have been so appointed within such 15 Business Day period, the Administrative Agent, with the consent of the Borrower, shall then appoint a successor Administrative Agent who shall serve as Administrative Agent hereunder or thereunder until such time, if any, as the Required Banks appoint a successor Administrative Agent as provided above.

(d) If no successor Administrative Agent has been appointed pursuant to clause (b) or (c) above by the 20th Business Day after the date such notice of resignation was given by the Administrative Agent, the Administrative Agent's resignation shall become effective and the Required Banks shall thereafter perform all the duties of the Administrative Agent hereunder and/or under any other Credit Document until such time, if any, as the Required Banks appoint a successor Administrative Agent as provided above.

SECTION 12. Miscellaneous.

12.01 Payment of Expenses, etc. The Borrower agrees to (and to cause each other Credit Party, in respect of the Credit Document to which it is a party, to): (i) whether or not the transactions herein contemplated are consummated, pay all reasonable out-of-pocket costs and expenses of the Administrative Agent in connection with the negotiation, preparation, execution and delivery of the Credit Documents and the documents and instruments referred to therein and any amendment, waiver or consent relating thereto (including, without limitation, the reasonable fees and disbursements of White & Case) and of the Administrative Agent and, after the occurrence and during the continuance of an Event of Default, each of the Banks in connection with the enforcement of the Credit Documents and the documents and instruments referred to therein (including, without limitation, the actual reasonable fees and disbursements of counsel for the Administrative Agent and, after the occurrence and during the continuance of an Event of Default for each of the Banks), provided that to the extent it is feasible and a conflict of interest does not exist in the reasonable discretion of the Administrative Agent, the Banks and their counsel, the Banks shall use the same counsel in connection with the foregoing; (ii) pay and hold each of the Banks harmless from and against any and all present and future stamp and other similar taxes with respect to the foregoing matters and save each of the Banks harmless from and against any and all liabilities with respect to or resulting from any delay or omission (other than to the extent attributable to such Bank) to pay such taxes; and (iii) indemnify each Bank (including in its capacity as the Administrative Agent or Letter of Credit Issuer), its officers, directors, employees, representatives and agents from and hold each of them harmless against

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any and all losses, liabilities, claims, damages or expenses incurred by any of them as a result of, or arising out of, or in any way related to, or by reason of, (a) any investigation, litigation or other proceeding (whether or not any Bank is a party thereto) related to the entering into and/or performance of any Credit Document or the use of the proceeds of any Loans hereunder or the consummation of any transactions contemplated in any Credit Document, whether initiated by the Borrower or any other Person, including, without limitation, the actual reasonable fees and disbursements of counsel incurred in connection with any such investigation, litigation or other proceeding (but excluding any such losses, liabilities, claims, damages or expenses to the extent incurred by reason of the gross negligence, willful misconduct, unlawful act or material breach of the terms of this Agreement of the Person to be indemnified) or (b) the actual or alleged presence of Hazardous Materials in the air, surface water, groundwater, surface or subsurface of any Real Property, Fleet Rig, facility or location at any time owned or operated by the Borrower or any of its Subsidiaries, the generation, storage, transportation or disposal of Hazardous Materials at any Real Property, Fleet Rig, facility or location at any time owned or operated by the Borrower or any of its Subsidiaries, the non- compliance of any Real Property, Fleet Rig, facility or location at any time owned or operated by the Borrower or any of its Subsidiaries with federal, state and local laws, regulations, and ordinances (including applicable permits thereunder) applicable to any such Real Property, Fleet Rig, facility or location, or any Environmental Claim asserted against the Borrower, any of its Subsidiaries, or any Real Property, Fleet Rig, facility or location at any time owned or operated by the Borrower or any of its Subsidiaries, including, in each case, without limitation, the actual reasonable fees and disbursements of counsel and other consultants incurred in connection with any such investigation, litigation or other proceeding (but excluding any losses, liabilities, claims, damages or expenses to the extent incurred by reason of the gross negligence, willful misconduct, unlawful act or material breach of the terms of this Agreement of the Person to be indemnified). To the extent that the undertaking to indemnify, pay or hold harmless the Administrative Agent or any Bank set forth in the preceding sentence may be unenforceable because it is violative of any law or public policy, the Borrowers shall make the maximum contribution to the payment and satisfaction of each of the indemnified liabilities which is permissible under applicable law.

12.02 Right of Setoff. In addition to any rights now or hereafter granted under applicable law or otherwise, and not by way of limitation of any such rights, if an Event of Default then exists, each Bank is hereby authorized at any time or from time to time, without presentment, demand, protest or other notice of any kind to the Borrower or to any other Person, any such notice being hereby expressly waived, to set off and to appropriate and apply any and all deposits (general or special) and any other Indebtedness at any time held or owing by such Bank (including without limitation by branches and agencies of such Bank wherever located) to or for the credit or the account of the Borrower against and on account of the Obligations and liabilities of the Borrower to such Bank under this Agreement or under any of the other Credit Documents, including, without limitation, all interests in Obligations of the Borrower purchased by such Bank pursuant to
Section 12.06(b), and all other claims of any nature or description arising out of or connected with

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this Agreement or any other Credit Document, irrespective of whether or not such Bank shall have made any demand hereunder and although said Obligations, liabilities or claims, or any of them, shall be contingent or unmatured. Without limiting the foregoing, each Bank agrees to use reasonable efforts to notify the Borrower of any exercise of such Bank's right of setoff granted hereby.

12.03 Notices. (a) Except as otherwise expressly provided herein, all notices and other communications provided for hereunder shall be in writing (including telex or telecopier communication) and mailed, telexed, telecopied or delivered, if to the Borrower or its Subsidiaries, at the address specified opposite its signature below or in the other relevant Credit Documents, as the case may be; if to any Bank, at its address specified for such Bank on Annex II; or, at such other address as shall be designated by any party in a written notice to the other parties hereto. All such notices and communications shall be effective when received and, in the case of notice by telecopier, after confirmation of such receipt has been given by the recipient, excluding by way of automatic receipt produced by telecopier.

(b) Without in any way limiting the obligation of the Borrower to confirm in writing any telephonic notice permitted to be given hereunder, the Administrative Agent or the Letter of Credit Issuer, as the case may be, may prior to receipt of written confirmation act without liability upon the basis of such telephonic notice, believed by the Administrative Agent or the Letter of Credit Issuer in good faith to be from an Authorized Officer of the Borrower. In each such case, the Borrower hereby waives the right to dispute the Administrative Agent's or the Letter of Credit Issuer's record of the terms of such telephonic notice.

12.04 Benefit of Agreement. (a) This Agreement shall be binding upon and inure to the benefit of and be enforceable by the respective successors and assigns of the parties hereto, provided that the Borrower may not assign or transfer any of its rights or obligations hereunder without the prior written consent of the Banks. Each Bank may at any time grant participations in any of its rights hereunder or under any of the Notes to another financial institution, provided that in the case of any such participation, the participant shall not have any rights under this Agreement or any of the other Credit Documents (the participant's rights against such Bank in respect of such participation to be those set forth in the agreement executed by such Bank in favor of the participant relating thereto) and all amounts payable by the Borrower hereunder shall be determined as if such Bank had not sold such participation, except that the participant shall be entitled to the benefits of Sections 1.10 and 4.04 of this Agreement to the extent that such Bank would be entitled to such benefits if the participation had not been entered into or sold, and, provided further, that no Bank shall transfer, grant or assign any participation under which the participant shall have rights to approve any amendment to or waiver of this Agreement or any other Credit Document except to the extent such amendment or waiver would (i) extend the final scheduled maturity of any Loan or Note in which such participant is participating or reduce the rate or extend the time of payment of interest or Fees thereon (except in connection with a waiver of the

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applicability of any post-default increase in interest rates), or reduce the principal amount thereof, or increase such participant's participating interest in any Commitment over the amount thereof then in effect (it being understood that a waiver of any Default or Event of Default or of a mandatory reduction in the Total Commitment, or a mandatory prepayment, shall not constitute a change in the terms of any Commitment) or (ii) consent to the assignment or transfer by the Borrower of any of its rights and obligations under this Agreement.

(b) Notwithstanding the foregoing, (x) any Bank may assign all or a portion of its outstanding Commitment and its rights and obligations hereunder to its Affiliate or to another Bank, and (y) with the consent of the Administrative Agent, the Letter of Credit Issuer and the Borrower (which consent shall not be unreasonably withheld), any Bank may assign all or a portion of its outstanding Commitment and its rights and obligations hereunder to one or more Eligible Transferees. No assignment pursuant to the immediately preceding sentence shall to the extent such assignment represents an assignment to an institution other than one or more Banks hereunder, be in an aggregate amount less than $10,000,000 unless the entire Commitment of the assigning Bank is so assigned. If any Bank so sells or assigns all or a part of its rights hereunder or under the Notes, any reference in this Agreement or the Notes to such assigning Bank shall thereafter refer to such Bank and to the respective assignee to the extent of their respective interests and the respective assignee shall have, to the extent of such assignment (unless otherwise provided therein), the same rights and benefits as it would if it were such assigning Bank. Each assignment pursuant to this Section 12.04(b) shall be effected by the assigning Bank and the assignee Bank executing an Assignment and Assumption Agreement. In the event of any such assignment (x) to a commercial bank or other financial institution not previously a Bank hereunder, either the assigning or the assignee Bank shall pay to the Administrative Agent a nonrefundable assignment fee of $3,500 and (y) to a Bank, either the assigning or assignee Bank shall pay to Administrative Agent a nonrefundable assignment fee of $1,500, and at the time of any assignment pursuant to this
Section 12.04(b), (i) Annex I shall be deemed to be amended to reflect the Commitment of the respective assignee (which shall result in a direct reduction to the Commitment of the assigning Bank) and of the other Banks, and (ii) if any such assignment occurs after the Effective Date, if requested by the assigning Bank and the assignee Bank, the Borrower will issue new Notes to the respective assignee and to the assigning Bank in conformity with the requirements of Section 1.05. Each Bank and the Borrower agree to execute such documents (including, without limitation, amendments to this Agreement and the other Credit Documents) as shall be necessary to effect the foregoing. Nothing in this clause (b) shall prevent or prohibit any Bank from pledging its Notes or Loans to a Federal Reserve Bank in support of borrowings made by such Bank from such Federal Reserve Bank.

(c) Notwithstanding any other provisions of this Section 12.04, no transfer or assignment of the interests or obligations of any Bank hereunder or any grant of participation therein shall be permitted if such transfer, assignment or grant would require the

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Borrower to file a registration statement with the SEC or to qualify the Loans under the "Blue Sky" laws of any State.

(d) Each Bank initially party to this Agreement hereby represents, and each Person that became a Bank pursuant to an assignment permitted by this Section 12 will, upon its becoming party to this Agreement, represent that it is a commercial lender, other financial institution or other "accredited" investor (as defined in SEC Regulation D) which makes loans in the ordinary course of its business and that it will make or acquire Loans for its own account in the ordinary course of such business, provided that subject to the preceding clauses (a) and (b), the disposition of any promissory notes or other evidences of or interests in Indebtedness held by such Bank shall at all times be within its exclusive control.

12.05 No Waiver; Remedies Cumulative. No failure or delay on the part of the Administrative Agent or any Bank in exercising any right, power or privilege hereunder or under any other Credit Document and no course of dealing between the Borrower or any of its Subsidiaries and the Administrative Agent or any Bank shall operate as a waiver thereof; nor shall any single or partial exercise of any right, power or privilege hereunder or under any other Credit Document preclude any other or further exercise thereof or the exercise of any other right, power or privilege hereunder or thereunder. The rights and remedies herein expressly provided are cumulative and not exclusive of any rights or remedies which the Administrative Agent or any Bank would otherwise have. No notice to or demand on the Borrower or any of its Subsidiaries in any case shall entitle the Borrower or any of its Subsidiaries to any other or further notice or demand in similar or other circumstances or constitute a waiver of the rights of the Administrative Agent or the Banks to any other or further action in any circumstances without notice or demand.

12.06 Payments Pro Rata. (a) The Administrative Agent agrees that promptly after its receipt of each payment from or on behalf of the Borrower or any of its Subsidiaries in respect of any Obligations of the Borrower or any of its Subsidiaries hereunder, it shall distribute such payment to the Banks (other than any Bank that has expressly waived its right to receive its pro rata share thereof) pro rata based upon their respective shares, if any, of the Obligations with respect to which such payment was received.

(b) Each of the Banks agrees that, if it should receive any amount hereunder (whether by voluntary payment, by realization upon security, by the exercise of the right of setoff or banker's lien, by counterclaim or cross action, by the enforcement of any right under the Credit Documents, or otherwise) which is applicable to the payment of the principal of, or interest on, the Loans, Unpaid Drawings or Fees, of a sum which with respect to the related sum or sums received by other Banks is in a greater proportion than the total of such Obligation then owed and due to such Bank bears to the total of such Obligation then owed and due to all of the Banks immediately prior to such receipt, then such Bank receiving such excess payment shall purchase for cash without recourse or warranty from the other Banks an interest in the Obligations of the Borrower or any of its Subsidiaries, respectively, to such Banks in such amount as shall result in a proportional participation by all of the

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Banks in such amount, provided that if all or any portion of such excess amount is thereafter recovered from such Bank, such purchase shall be rescinded and the purchase price restored to the extent of such recovery, but without interest.

(c) Notwithstanding anything to the contrary contained herein, the provisions of the preceding Sections 12.06(a) and (b) shall be subject to the express provisions of this Agreement which require, or permit, differing payments to be made to Non-Defaulting Banks as opposed to Defaulting Banks.

12.07 Calculations; Computations. (a) The financial statements to be furnished to the Banks pursuant hereto shall be made and prepared in accordance with GAAP consistently applied throughout the periods involved (except as set forth in the notes thereto or as otherwise disclosed in writing by the Borrower to the Banks), provided that (x) except as otherwise specifically provided herein, all computations determining compliance with
Section 8, including definitions used therein, shall utilize accounting principles and policies in effect at the time of the preparation of, and in conformity with those used to prepare, the December 31, 1996 and March 31, 1997 historical financial statements of the Borrower delivered to the Banks pursuant to Section 6.10(b), and (y) that if at any time the computations determining compliance with Section 8 utilize accounting principles different from those utilized in the financial statements furnished to the Banks, such financial statements shall be accompanied by reconciliation work-sheets.

(b) All computations of interest relating to Eurodollar Loans shall be made on the actual number of days elapsed over a year of 360 days. All other computations of interest hereunder and Fees shall be made on the actual number of days elapsed over a year of 365 days.

12.08 Governing Law; Submission to Jurisdiction; Venue; Waiver of Jury Trial. (a) This Agreement and the other Credit Documents and the rights and obligations of the parties hereunder and thereunder shall be construed in accordance with and be governed by the law of the state of New York. Any legal action or proceeding with respect to this Agreement or any other Credit Document may be brought in the courts of the state of New York or of the United States for the Southern District of New York, and, by execution and delivery of this Agreement, the Borrower hereby irrevocably accepts for itself and in respect of its property, generally and unconditionally, the non- exclusive jurisdiction of the aforesaid courts. The Borrower further irrevocably consents to the service of process out of any of the aforementioned courts in any such action or proceeding by the mailing of copies thereof by registered or certified mail, postage prepaid, to the Borrower located outside New York City and by hand delivery to the Borrower located within New York City, at its address for notices pursuant to Section 12.03, such service to become effective 30 days after such mailing. Nothing herein shall affect the right of the Administrative Agent, any Bank to serve process in any other manner permitted by law or to commence legal proceedings or otherwise proceed against the Borrower in any other jurisdiction.

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(b) The Borrower hereby irrevocably waives any objection which it may now or hereafter have to the laying of venue of any of the aforesaid actions or proceedings arising out of or in connection with this Agreement or any other Credit Document brought in the courts referred to in clause (a) above and hereby further irrevocably waives and agrees not to plead or claim in any such court that any such action or proceeding brought in any such court has been brought in an inconvenient forum.

(c) Each of the parties to this agreement hereby irrevocably waives all right to a trial by jury in any action, proceeding or counterclaim arising out of or relating to this agreement, the other credit documents or the transactions contemplated hereby or thereby.

12.09 Counterparts. This Agreement may be executed in any number of counterparts and by the different parties hereto on separate counterparts, each of which when so executed and delivered shall be an original, but all of which shall together constitute one and the same instrument. A set of counterparts executed by all the parties hereto shall be lodged with the Borrower and the Administrative Agent.

12.10 Effectiveness. This Agreement shall become effective on the date (the "Effective Date") on which (i) the Borrower and each of the Banks shall have signed a copy hereof (whether the same or different copies) and shall have delivered the same to the Administrative Agent at the Payment Office of the Administrative Agent or, in the case of the Banks, shall have given to the Administrative Agent telephonic (confirmed in writing), written telex or facsimile transmission notice (actually received) at such office that the same has been signed and mailed to it and (ii) the Borrower shall have fully complied with each of the conditions set forth in Section 5.

12.11 Headings Descriptive. The headings of the several sections and subsections of this Agreement are inserted for convenience only and shall not in any way affect the meaning or construction of any provision of this Agreement.

12.12 Amendment or Waiver. (a) Neither this Agreement nor any other Credit Document nor any terms hereof or thereof may be changed, waived, discharged or terminated unless such change, waiver, discharge or termination is in writing signed by the Borrower and the Required Banks, provided that no such change, waiver, discharge or termination shall, without the consent of each Bank (other than a Defaulting Bank) affected thereby, (i) extend the Maturity Date, or reduce the rate or extend the time of payment of interest (other than as a result of waiving the applicability of any post-default increase in interest rates) or Fees thereon, or reduce the principal amount thereof, (ii) increase the Commitment of any Bank over the amount thereof then in effect (it being understood that a waiver of any Default or Event of Default or of a mandatory reduction in the Total Commitment shall not constitute a change in the terms of any Commitment of any Bank), (iii) amend, modify or waive any provision of this Section, (iv) reduce the percentage specified in the definition of Required Banks or (v) consent to the assignment or transfer by the Borrower of any of its rights and obligations under this Agreement. No provision of Sections 2 or 11, or any other

-75-

provisions relating to the Letter of Credit Issuer or the Administrative Agent may be modified without the consent of the Letter of Credit Issuer or the Administrative Agent, respectively.

(b) If, in connection with any proposed change, waiver, discharge or termination to any of the provisions of this Agreement as contemplated by clauses (i) through (v), inclusive, of the first proviso to
Section 12.12(a), the consent of the Required Banks is obtained but the consent of one or more of such other Banks whose consent is required is not obtained, then the Borrower shall have the right to replace each such non-consenting Bank or Banks (so long as all non-consenting Banks are so replaced) with one or more Replacement Banks pursuant to Section 1.13, so long as at the time of such replacement, each such Replacement Bank consents to the proposed change, waiver, discharge or termination, provided that the Borrower shall not have the right to replace a Bank solely as a result of the exercise of such Bank's rights (and the withholding of any required consent by such Bank) pursuant to
Section 12.12(a)(ii).

12.13 Survival. All indemnities set forth herein including, without limitation, in Section 1.10, 1.11, 4.04, 11.07 or 12.01 shall survive the execution and delivery of this Agreement and the making and repayment of the Loans.

12.14 Domicile of Loans. Each Bank may transfer and carry its Loans at, to or for the account of any branch office, subsidiary or Affiliate of such Bank, provided that the Borrower shall not be responsible for costs arising under Section 1.10 or 4.04 resulting from any such transfer (other than a transfer pursuant to Section 1.12(a)) to the extent not otherwise applicable to such Bank prior to such transfer.

12.15 Confidentiality. Subject to Section 12.04, the Banks shall hold all non-public information obtained pursuant to the requirements of this Agreement in accordance with its customary procedure for handling confidential information of this nature and in accordance with safe and sound banking practices and in any event may make disclosure reasonably required by any bona fide transferee or participant in connection with the contemplated transfer of any Loans or participation therein (so long as such transferee or participant agrees in writing to be bound by the provisions of this Section 12.15) or as required or requested by any governmental agency or representative thereof or pursuant to legal process, provided that, unless specifically prohibited by applicable law or court order, each Bank shall notify the Borrower of any request by any governmental agency or representative thereof (other than any such request in connection with an examination of the financial condition of such Bank by such governmental agency) for disclosure of any such non-public information prior to disclosure of such information, and provided further that in no event shall any Bank be obligated or required to return any materials furnished by the Borrower or any Subsidiary.

12.16 Registry. The Borrower hereby designates the Administrative Agent to serve as the Borrower's agent, solely for purposes of this Section 12.16, to maintain a

-76-

register (the "Register") on which it will record the Commitments from time to time of each of the Banks, the Loans made by each of the Banks and each repayment in respect of the principal amount of the Loans of each Bank. Failure to make any such recordation, or any error in such recordation shall not affect the Borrower's obligations in respect of such Loans. With respect to any Bank, the transfer of the Commitments of such Bank and the rights to the principal of, and interest on, any Loan made pursuant to such Commitments shall not be effective until such transfer is recorded on the Register maintained by the Administrative Agent with respect to ownership of such Commitments and Loans and prior to such recordation all amounts owing to the transferor with respect to such Commitments and Loans shall remain owing to the transferor. The registration of assignment or transfer of all or part of any Commitments and Loans shall be recorded by the Administrative Agent on the Register only upon the acceptance by the Administrative Agent of a properly executed and delivered Assignment and Assumption Agreement pursuant to Section 12.04(b). Coincident with the delivery of such an Assignment and Assumption Agreement to the Administrative Agent for acceptance and registration of assignment or transfer of all or part of a Loan, or as soon thereafter as practicable, the assigning or transferor Bank shall surrender the Note evidencing such Loan, and thereupon one or more new Notes in the same aggregate principal amount shall be issued to the assigning or transferor Bank and/or the new Bank.

* * *

-77-

IN WITNESS WHEREOF, each of the parties hereto has caused a counterpart of this Agreement to be duly executed and delivered as of the date first above written.

Address:                           NOBLE DRILLING CORPORATION


10370 Richmond Avenue
Suite 400                          By   /s/  BYRON L. WELLIVER
                                     -------------------------------------
Houston, TX  77042
Attn:  Byron S. Welliver,              Title: Sr. Vice President
       Senior Vice President-
       Finance, Treasurer
       and Controller
Telephone:  (713) 974-3131
Facsimile:  (713) 974-3181


CHRISTIANIA BANK OG KREDITKASSE ASA,
NEW YORK BRANCH,
Individually and as Administrative Agent

By  /s/ Carl-Peter Svendsen
  ----------------------------------------
Title: First Vice President


By  /s/  Hans Chr Kjelsrud
  ----------------------------------------
Title: First Vice President


THE BANK OF NOVA SCOTIA

By /s/ E.C.H. Ashby
  ----------------------------------------
   Title: Sr. Manager


THE BANK OF TOKYO-MITSUBISHI, LTD., HOUSTON
AGENCY

By /s/ John W. McGhee
  ----------------------------------------
   Title: Vice President


CREDIT LYONNAIS NEW YORK BRANCH

By     /s/ Pascal Poupelle
  ----------------------------------------
   Title:  Executive Vice President


THE FUJI BANK, LIMITED, HOUSTON AGENCY

By     /s/ Nate Ellis
  ----------------------------------------
   Title:  Vice President


KREDIETBANK N.V., GRAND CAYMAN BRANCH

By     /s/ Tod R. Angus
  ----------------------------------------
   Title:  Vice President


By     /s/ Kurt Barkley
  ----------------------------------------
   Title:  Vice President


FIRST NATIONAL BANK OF COMMERCE

By /s/ JOSHUA CUMMINGS
  ----------------------------------------
   Title: Assistant Vice President


MEESPIERSON CAPITAL CORPORATION

By /s/ JOHN T. CONNORS
  ----------------------------------------
   Title: Executive Vice President


By /s/ SVEIN ENGH
  ----------------------------------------
   Title: Vice President


ROYAL BANK OF CANADA

By /s/ LINDA M. STEPHENS
  ----------------------------------------
   Title: Manager


THE SANWA BANK, LIMITED

By /s/ MATTHEW G. PATRICK
  ----------------------------------------
   Title: Vice President


SKANDINAVISKA ENSKILDA BANKEN AB (Publ.)

By /s/ MAGNE HAGA
  ----------------------------------------
   Title: Head of Unit


By /s/ BJARTE BOE
  ----------------------------------------
   Title: Authorized Signatory


WELLS FARGO BANK (TEXAS) NATIONAL
ASSOCIATION

By       /s/ FRANK SCHAGEMAN
  ----------------------------------------
   Title: Vice President


WESTDEUTSCHE LANDESBANK GIROZENTRALE, NEW
YORK BRANCH

By         /s/ ALAN S. BOOKSPAN
  ----------------------------------------
   Title:  Vice President


By         /s/ THOMAS LEE
  ----------------------------------------
   Title:  Associate


ANNEX I

COMMITMENTS

              Bank                                                    Commitment
              ----                                                    ----------
Christiania Bank og Kreditkasse,                                     $29,000,000
  New York Branch

Credit Lyonnais New York Branch                                      $17,000,000

Bank of Tokyo-Mitsubishi, Ltd.,                                      $16,500,000
  Houston Agency

The Fuji Bank Limited, Houston                                       $16,500,000
  Agency

Kredietbank N.V., Grand Cayman Branch                                $16,500,000

MeesPierson Capital Corporation                                      $16,500,000

Royal Bank of Canada                                                 $16,500,000

Wells Fargo Bank (Texas) National                                    $16,500,000
  Association

Westdeutsche Landesbank Girozentrale,                                $16,500,000
  New York Branch

The Bank of Nova Scotia                                              $11,500,000

Skandinaviska Enskilda Banken AB (Publ.)                             $11,500,000

The Sanwa Bank, Limited                                               $8,500,000

First National Bank of Commerce                                       $7,000,000
                                                                    ------------
TOTAL                                                               $200,000,000


ANNEX II

BANK ADDRESSES

Christiania Bank og                        11 West 42nd Street
Kreditkasse ASA, New York Branch           7th Floor
                                           New York, New York  10036

                                           Attention: Loan Administration
                                           Tel: (212) 827-4800
                                           Fax: (212) 827-4888

Credit Lyonnais Houston                    1000 Louisiana, Suite 5360
  Representative Office                    Houston, TX  77002

                                           W. Thomas Byargeon
                                           T: (713) 753-8706
                                           F: (713) 751-0307/0421


The Bank of Tokyo-Mitsubishi, Ltd         1100 Louisiana Street, 2800
  Houston Agency                          Houston, TX  77002-5216

                                          Jason York
                                          Tel: (713) 655-3809
                                          Fax: (713) 658-0116

The Fuji Bank Limited                     One Houston Center, Suite 4100
Houston Agency                            1221 McKinney
                                          Houston, TX  77010

                                          Mark Polasek
                                          Tel: (713) 650-7863
                                          Fax: (713) 759-0048

Kredietbank N.V.                          1349 West Peachtree Street
                                          Suite 1750
                                          Atlanta, GA  30309

                                          Michael Sawicki/Kojo Asakura
                                          T: (404) 876-2556
                                          F: (404) 876-3212

Mees Pierson Capital Corporation          445 Park Avenue
                                          New York, NY  10022

                                          Svein Engh
                                          T: (212) 801-0415
                                          F: (212) 801-0420

Royal Bank of Canada                      12450 Greenspoint Drive,
                                          Suite 1450
                                          Houston, TX  77060

                                          Linda M. Stephens
                                          T: (281) 874-5669
                                          F: (281) 874-0081


Wells Fargo Bank (TX) National            1000 Louisiana, 3rd Floor
  Association                             Houston, TX  77002

                                          Frank W. Schageman
                                          T: (713) 250-4352
                                          F: (713) 250-7912

Westdeutsche Landesbank                   1211 Avenue of the Americas
  Girozentrale                            New York, NY  10036

                                          Richard Newman
                                          T: (212) 852-6120
                                          F: (212) 852-6307

The Bank of Nova Scotia                   1100 Louisiana, Suite 3000
                                          Houston, TX  77002

                                          Jamie Conn
                                          T: (713) 752-0900
                                          F: (713) 752-2425

Skandinaviska Enskilda                    Rosenkrantzgate 22
  Banken AB (publ.)                       N-0123 Oslo, NORWAY

                                          Bjarte Bee
                                          T: (47) 22-82-70-04
                                          F: (47) 22-82-71-31


The Sanwa Bank, Limited                   2200 Ross Avenue, Suite 4100W
                                          Dallas, TX  75201

                                          Matthew Patrick,
                                          Vice President
                                          T: (214) 665-0217
                                          F: (214) 953-3936

First National Bank of Commerce           201 St. Charles Avenue
                                          28th Floor
                                          New Orleans, LA  70170

                                          Joshua C. Cummings
                                          T: (504) 623-1497
                                          F: (504) 623-1497


EXHIBIT 10.14

NOBLE DRILLING CORPORATION
SHORT TERM INCENTIVE PLAN

Revised: July 1997*

PURPOSE

The success of Noble Drilling Corporation ("Noble Drilling") and its subsidiaries (collectively, unless the context otherwise requires, the "Company") is a result of the collective efforts of all employees. Each position within the Company has the ability to make a positive contribution to key factors making up the components used to measure a successful year. Those components include factors such as increase in shareholder value and increase in net income, year to year. In order to intensify each employee's attention on available opportunities to increase revenues, control costs and seek out profitable ventures, the Company maintains a bonus program that rewards employees for successful achievement of specific goals. It is management's belief that shareholders will benefit from the creation of an environment that ties employee compensation to the success of the Company.

PARTICIPATION AND ELIGIBILITY

The bonus plan covers all full-time employees in salary classifications 18 and higher who have completed one year of service at the close of the bonus plan year, which will be a calendar year. The bonus earned by employees with less than two full years of service will be adjusted based upon the number of full months employed compared to twenty-four months. Additionally, no bonus payments will be made for a partial year of service. Eligibility will be determined from the employee roster at close of the bonus plan year and employees must be actively employed with the Company on the day which bonus payments are made to receive a bonus payment.

STRUCTURE
TARGET BONUS

The target bonus amount shall be determined on an aggregate basis for each operating region and department. The target bonus shall be the base salary at year end of eligible employees multiplied times the appropriate percentage factor assigned to the salary classification. Salary classifications and target bonus factors are as follows:

*Established 1977

- 1 -

Salary Classification1                          Target Factor
---------------------                           -------------

  18N through 19N                                     10%
  20N through 23N*                                    15%
  24N through 25N                                     25%
  26N through 27N                                     30%
  28N through 32N                                     35%
  30C through 32C                                     45%
  33C through 36C                                     55%
  37C                                                 75%

There is some grade classification variance by division.

GOALS

At the end of each year, the total bonus pool will be determined by the Board of Directors, considering target bonus levels, the Board's assessment of overall company results, and attainment of specific, predetermined division or corporate goals. Goals in the following categories will be recommended each year by the Chief Executive Officer of Noble Drilling Corporation and approved by the Board of Directors for the Corporation and for each hemisphere and operating region. The percentage weighting assigned to each goal shall be as follows subject to annual review by the Board of Directors.

Corporate Goals Assigned Weight

1. Total shareholder return 50%
2. Return on invested capital 50%

Division Goals                               Assigned Weight
--------------                               ---------------
(Gulf Coast Marine, Middle East, Venezuela,

Nigeria, Angola, Nedscan, Brazil and Hibernia)

1. Return on invested capital 35%
2. Budgeted total daily operating costs 35%
3. Budgeted capital expenditures 10%
4. Safety results 10%
5. Rig maintenance and appearance 10%

* Toolpushers in all divisions, except the U.K., will be in a 10% bonus category. Platform Superintendents and Toolpushers in the U.K. division will be in a special 5% bonus category.

- 2 -


U.K. and Triton Goals Assigned Weight

1. Net income improvement 80%
2. Safety results 20%

The goal weighting percentage will be used in measuring overall performance, considering measurement of actual results measured against the goal for each factor. The adjustment to the goal weighting will be based upon the following schedule.

Goal Achievement Range                       Adjustment Factor
----------------------                       -----------------

Greater than 135%                                     2.00
126--135%                                             1.75
116--125%                                             1.50
106--115%                                             1.25
 96--105%                                             1.00
 86-- 95%                                              .75
 76-- 85%                                              .50
Less than 75%                                          .00

The target bonus for corporate employees will be adjusted to reflect the combined percentage of achievement of all assigned corporate goals. The target bonus for operating region employees will be adjusted to reflect the combined percentage of achievement of all assigned goals using the ratio of 50 percent for operating region goal achievement and 50 percent for corporate goal achievement. Accordingly, the bonus payable to operating region employees is dependent on the level of achievement of both hemisphere, operating region and corporate goals. The dollar amount of the bonus payable, if any, will be calculated using the target bonus amount times the applicable multiplier determined under the following adjustment schedule:

    Combined                                   Target Bonus
Goal Achievement                                  Payable
----------------                                  -------

Greater than 160%                                   2.00
141--160%                                           1.75
131--140%                                           1.50
121--130%                                           1.40
106--120%                                           1.20
 96--105%                                           1.00
 76-- 95%                                            .75
 66-- 75%                                            .25
Below 65%                                            .00

- 3 -

BONUS ALLOCATION

All employees in salary classifications 18N through 37C shall receive a bonus (assuming a bonus is payable) as calculated using the target bonus times the applicable multiplier. The remaining bonus pool shall be allocated to eligible employees within the hemispheres, regions or departments based upon merit. Deviation above or below the target bonus percent must be justified in writing by the employee's supervisor. Hemisphere Managing Directors, Region Managers and department heads shall submit the allocated bonus listing to the Chief Executive Officer of Noble Drilling for review and approval. All bonus calculations, allocations and recommendations are subject to review and approval by the Compensation Committee of the Board of Directors. The Committee and the Chief Executive Officer have the ability to adjust individual bonus calculations as deemed to be appropriate for any reason.

GOAL FLEXIBILITY

It is intended that the total bonus pool will reflect the best judgment of the Board of Directors in determining overall Company performance for the year. In determining overall Company performance, the Board will consider the Company's performance in relation to the pre-determined goals and market conditions. However, because the goals are established in November/December of the preceding plan year, some consideration to subsequent budget revisions may be given. It is expected that the Company will prepare budgets and forecasts in October/November of the plan year. If such budgets have substantially changed due to subsequent events, then the Chief Executive Officer of Noble Drilling Corporation shall, at his discretion, submit revised goals to the Board of Directors of Noble Drilling for its approval. Revision(s) to the goals can be considered subsequent to April at the Board's discretion.

- 4 -

EXHIBIT 10.16

AMENDMENT NO. 1 TO THE
NOBLE DRILLING CORPORATION
AMENDED AND RESTATED THRIFT RESTORATION PLAN

Pursuant to the provisions of Section 4.1 thereof, the Noble Drilling Corporation Amended and Restated Thrift Restoration Plan as executed on March 17, 1995, to be effective as of April 5, 1994 (the "Plan"), is hereby amended in the following respects only:

FIRST: Section 1.1(h) of the Plan is hereby amended by restatement in its entirety to read as follows:

(h) "Eligible Employee" means, with respect to a Plan Year, any employee of an Employer (i) whose annual base salary as of the first day of such year (as estimated by the Committee during the Election Period for such year) will be at least equal to the greater of $80,000 or the compensation threshold amount applicable in determining a highly compensated employee for such year under Section 414(q)(1) of the Internal Revenue Code, and (ii) who is designated by the Committee as an Eligible Employee for such year for the purposes of this Plan.

SECOND: The reference to "10%" in Section 3.1(ii) of the Plan is hereby amended to refer to "12%".

THIRD: Section 4.1 of the Plan is hereby amended by restatement in its entirety to read as follows:

Section 4.1 Amendment and Termination. The Board of Directors of the Company shall have the right and power at any time and from time to time to amend this Plan, in whole or in part, on behalf of all Employers, and at any time to terminate this Plan or any Employer's participation hereunder; provided, however, that no such amendment or termination shall reduce the amounts actually credited to a Participant's Accounts as of the date of such amendment or termination, or further defer the dates for the payment of such amounts, without the consent of the affected Participant. Any amendment to or termination of this Plan shall be made by or pursuant to a resolution duly adopted by the Board of Directors of the Company, and shall be evidenced by such resolution or by a written instrument executed by such person as the Board of Directors of the Company shall authorize for such purpose.


IN WITNESS WHEREOF, this Amendment has been executed this 29th day of January, 1998, to be effective as of January 1, 1998.

NOBLE DRILLING CORPORATION

By /s/ James C. Day
   --------------------------------
   Title:  Chairman, President and
   Chief Executive Officer


EXHIBIT 10.18

AMENDMENT NO. 1 TO THE
NOBLE DRILLING CORPORATION
RETIREMENT RESTORATION PLAN

Pursuant to the provisions of Section 7 thereof, the Noble Drilling Corporation Retirement Restoration Plan as executed on April 27, 1995 (the "Plan"), is hereby amended in the following respect only:

Section 1.1(e) of the Plan is hereby amended by restatement in its entirety to read as follows:

(e) "Participant" means any employee of an Employer (i) who is a participant in the Retirement Plan, (ii) whose annual base salary from an Employer at the time such employee is designated by the Committee to be a Participant in this Plan is at least equal to the greater of $150,000 or the maximum amount of compensation that may be taken into account under the compensation limitation imposed under the Retirement Plan in order to comply with Section 401(a)(17) of the Code, and (iii) who has been designated by the Committee to be a Participant in this Plan.

IN WITNESS WHEREOF, this Amendment has been executed this 29th day of January, 1998, to be effective as of January 1, 1998.

NOBLE DRILLING CORPORATION

By /s/ James C. Day
   -------------------------------------
   Title: Chairman, President and
          Chief Executive Officer


EXHIBIT 21.1

SUBSIDIARIES

The following table sets forth the subsidiaries of Noble Drilling Corporation as of March 13, 1998 (excluding certain subsidiaries that, if considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary (as defined in Rule 1-02(w) of Regulation S-X) as of December 31, 1997):

SUBSIDIARY NAME                                                     INCORPORATED OR ORGANIZED IN:
---------------                                                     -----------------------------
Noble Drilling International Inc. (1)                                                    Delaware
Noble Drilling Land Inc. (1)                                                               Nevada
Noble Drilling Services Inc. (1)                                                         Delaware
Noble Drilling (U.S.) Inc. (1)                                                           Delaware
Noble Offshore Corporation (1)                                                           Delaware
Triton Engineering Services Company (1)                                                  Delaware
Noble Drilling International (Cayman) Ltd. (2)                                     Cayman Islands
Noble Drilling (Canada) Ltd. (2)                                                          Alberta
Mexico Drilling Partners Inc. (3)                                                          Nevada
Noble Drilling Land Ltd. (3)                                            Texas Limited Partnership
Noble Drilling (Mexico) Inc. (3)                                                         Delaware
Noble (Gulf of Mexico) Inc. (3)                                                          Delaware
Noble Offshore Africa Inc. (4)                                                     Cayman Islands
Triton International, Inc. (5)                                                           Delaware
Triton Tool & Supply, Inc. (5)                                                              Texas
Triton USA, Inc. (5)                                                                     Delaware
International Directional Services Ltd. (6)                                               Bermuda
Neddrill do Brasil S/C Ltda. (6)                                                           Brazil
Noble Asset Company Limited (6)                                                    Cayman Islands
Noble Asset (U.K.) Limited (6)                                                     Cayman Islands
Noble Contracting GmbH (6)                                                            Switzerland
Noble Drilling (Nederland) B.V. (6)                                               The Netherlands
Noble Drilling (Nigeria) Ltd. (6)                                                         Nigeria
Noble Drilling (TVL) Ltd. (6)                                                      Cayman Islands
Noble Drilling (U.K.) Ltd. (6)                                                               U.K.
Noble Drilling (West Africa) Ltd. (6)                                              Cayman Islands
Noble Drilling de Venezuela C.A. (6)                                                    Venezuela
Noble Enterprises Limited (6)                                                      Cayman Islands
Noble International Limited (6)                                                    Cayman Islands
Noble Mexico Limited (6)                                                           Cayman Islands
Noble-Neddrill International Limited (6)                                           Cayman Islands
Bawden Drilling Inc. (7)                                                                 Delaware
Bawden Drilling International Ltd. (7)                                                    Bermuda
Triton Drilling (Nigeria) Ltd. (8)                                                        Nigeria
Triton International de Mexico, S.A. de C.V. (8)                                           Mexico
Arktik Drilling Limited, Inc. (10)                                                        Bahamas
Noble Kvaerner Drilling Limited (11)                                                      Bahamas
Noble Drilling (Europe) Ltd. (12)                                                         Bermuda
Noble Land Support Limited (12)                                                              U.K.
Rigquip Ltd. (12)                                                                            U.K.
Noble Drilling International Ltd. (13)                                                    Bermuda
Noble Drilling International Services Pte. Ltd. (13)                                    Singapore
Noble Drilling (Malaysia) Sdn. Bhd. (13)                                                 Malaysia
Noble Drilling Arabia Limited (14)                                                   Saudi Arabia
Resolute Insurance Group Ltd. (15)                                                        Bermuda


(1) 100% owned by Noble Drilling Corporation
(2) 100% owned by Noble Drilling International Inc.
(3) 100% owned by Noble Drilling (U.S.) Inc.
(4) 100% owned by Noble Offshore Corporation
(5) 100% owned by Triton Engineering Services Company
(6) 100% owned by Noble Drilling International (Cayman) Ltd.
(7) 100% owned by Noble Drilling (Canada) Ltd.
(8) 100% owned by Triton International, Inc.
(9) 100% owned by Noble Asset Company Limited
(10) Joint venture (owned 41% by Noble Drilling (Nederland) B.V.)
(11) Joint venture (owned 50% by Noble Drilling (Nederland) B.V.)
(12) 100% owned by Noble Drilling (U.K.) Ltd.
(13) 100% owned by Noble Enterprises Limited (70% in the case of Noble Drilling Malaysia Sdn. Bhd.)
(14) 100% owned by Noble International Limited
(15) 100% owned by Bawden Drilling International Ltd.


EXHIBIT 23.1

CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 33-3289), Form S-8 (33-15269), Form S-8 (No. 33-18966), Form S-8 (33-46724), Form S-8 (33-50270), Form S-8 (33-50272), Form S-8 (33-62394) and Form S-3 (333-43183) of Noble Drilling Corporation of our report dated January 29, 1998, appearing on page 24 of this Form 10-K.

/s/ PRICE WATERHOUSE LLP

    Houston, Texas


    March 25, 1998


ARTICLE 5
MULTIPLIER: 1,000


PERIOD TYPE 12 MOS
FISCAL YEAR END DEC 31 1997
PERIOD END DEC 31 1997
CASH 49,917
SECURITIES 16,471
RECEIVABLES 137,096
ALLOWANCES 1,380
INVENTORY 4,559
CURRENT ASSETS 265,015
PP&E 1,457,528
DEPRECIATION 256,613
TOTAL ASSETS 1,505,811
CURRENT LIABILITIES 152,890
BONDS 138,139
PREFERRED MANDATORY 0
PREFERRED 0
COMMON 13,334
OTHER SE 1,135,720
TOTAL LIABILITY AND EQUITY 1,505,811
SALES 0
TOTAL REVENUES 713,195
CGS 0
TOTAL COSTS 387,081
OTHER EXPENSES (55,233)
LOSS PROVISION 0
INTEREST EXPENSE 12,894
INCOME PRETAX 379,613
INCOME TAX 115,731
INCOME CONTINUING 0
DISCONTINUED 0
EXTRAORDINARY (6,685)
CHANGES 0
NET INCOME 257,197
EPS PRIMARY 1.95
EPS DILUTED 1.93