RISK FACTORS

Common units are inherently different from the capital stock of a corporation, although many of the business risks to which we are subject are similar to those that would be faced by a corporation engaged in a similar business. You should carefully consider the following risk factors together with all of the other information included in this prospectus in evaluating an investment in our common units.

If any of the following risks were actually to occur, our business, financial condition, results of operations and cash flows could be materially adversely affected. In that case, we might not be able to make distributions on our common units, the trading price of our common units could decline, and you could lose all or part of your investment.

Risks Inherent in Our Business

Because our ownership interest in OPCO currently represents our only cash-generating asset, our cash flow initially will depend completely on OPCO’s ability to make distributions to its owners, including us.

Our cash flow initially will depend completely on OPCO’s distributions to us as one of its owners. The amount of cash OPCO can distribute to its owners will principally depend upon the amount of cash it generates from its operations, which may fluctuate from quarter to quarter based on, among other things:

The actual amount of cash OPCO will have available for distribution also will depend on other factors such as:

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OPCO’s operating agreements provide that it will distribute its available cash to its owners on a quarterly basis. OPCO’s available cash includes cash on hand less any reserves that may be appropriate for operating its business. The amount of OPCO’s quarterly distributions, including the amount of cash reserves not distributed, will be determined by our board of directors.

The amount of cash OPCO generates from operations may differ materially from its profit or loss for the period, which will be affected by non-cash items. As a result of this and the other factors mentioned above, OPCO may make cash distributions during periods when it records losses and may not make cash distributions during periods when it records net income.

We may not have sufficient cash from operations following the establishment of cash reserves and payment of fees and expenses to enable us to pay the minimum quarterly distribution on our common units and subordinated units.

The source of our earnings and cash flow initially will consist exclusively of cash distributions from OPCO. Therefore, the amount of cash distributions we are able to make to our unitholders will fluctuate, initially, based on the level of distributions made by OPCO to its owners, including us, and, in the future, based on the level of cash distributions made by OPCO and any other subsidiaries through which we later conduct operations. OPCO or any such operating subsidiaries may make quarterly distributions at levels that will not permit us to make distributions to our common unitholders at the minimum quarterly distribution level or to increase our quarterly distributions in the future. In addition, while we would expect to increase or decrease distributions to our unitholders if OPCO increases or decreases distributions to us, the timing and amount of any such increased or decreased distributions will not necessarily be comparable to the timing and amount of the increase or decrease in distributions made by OPCO to us.

Our ability to distribute to our unitholders any cash we may receive from OPCO or any future operating subsidiaries is or may be limited by a number of factors, including, among others:

Many of these factors will reduce the amount of cash we may otherwise have available for distribution. We may not be able to pay distributions, and any distributions we make may not be at or above our minimum quarterly distribution. The actual amount of cash that is available for distribution to our unitholders will depend on several factors, many of which are beyond our control.

The assumptions underlying our forecast of cash available for distribution are inherently uncertain and are subject to risks and uncertainties that could cause actual results to differ materially from those forecasted.

The forecast of cash available for distribution set forth in “Our Cash Distribution Policy and Restrictions on Distributions” includes our forecast of operating results and cash flows for the twelve months ending September 30, 2013. The financial forecast has been prepared by management and we have not received an

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opinion or report on it from our or any independent auditor. The assumptions underlying the forecast are inherently uncertain and are subject to significant business, economic, regulatory and competitive risks and uncertainties that could cause actual results to differ materially from those forecasted. If we do not achieve the forecasted results, we may not be able to pay the full minimum quarterly distribution or any amount on our common units or subordinated units, in which event the market price of our common units may decline materially.

The amount of available cash we need to pay the minimum quarterly distribution for four quarters on the common units and the subordinated units to be outstanding immediately after this offering is $         million. During the twelve months ended June 30, 2012, the year ended December 31, 2011 and the six months ended June 30, 2012, we would have had cash available for distribution of $48.1 million, $44.3 million and $26.4 million, respectively, which would not have been sufficient to pay the minimum quarterly distribution on all of our common units and subordinated units, as the historical periods did not include results, except for pre-commencement revenue in June 2012, for the West Capricorn , which commenced operations in July 2012. Please read “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Items You Should Consider When Evaluating Our Historical Financial Performance and Assessing Our Future Prospects.” For a forecast of our ability to pay the full minimum quarterly distribution on our common units and subordinated units for the twelve months ending September 30, 2013, please read “Our Cash Distribution Policy and Restrictions on Distributions.”

Our ability to grow may be adversely affected by our cash distribution policy. OPCO’s ability to meet its financial needs and grow may be adversely affected by its cash distribution policy.

Our cash distribution policy, which is consistent with our operating agreement, requires us to distribute all of our available cash each quarter. Accordingly, our growth may not be as fast as businesses that reinvest their available cash to expand ongoing operations.

In addition, OPCO’s cash distribution policy requires it to distribute all of its available cash each quarter. In determining the amount of cash available for distribution by OPCO, our board of directors will approve the amount of cash reserves to set aside for us and OPCO, including reserves for anticipated maintenance and replacement capital expenditures, working capital and other matters. OPCO will also rely upon external financing sources, including commercial borrowings, to fund its capital expenditures. Accordingly, to the extent OPCO does not have sufficient cash reserves or is unable to obtain financing, its cash distribution policy may significantly impair its ability to meet its financial needs or to grow.

OPCO must make substantial capital and operating expenditures to maintain the operating capacity of its fleet, which will reduce cash available for distribution. In addition, each quarter we are required to deduct estimated maintenance and replacement capital expenditures from operating surplus, which may result in less cash available to unitholders than if actual maintenance and replacement capital expenditures were deducted.

OPCO must make substantial capital and operating expenditures to maintain and replace, over the long-term, the operating capacity, of its fleet. We estimate that maintenance and replacement capital expenditures for OPCO will average approximately $76.7 million per year, including $47.2 million for replacing current drilling rigs at the end of their useful lives. Maintenance and replacement capital expenditures include capital expenditures for maintenance (including special classification surveys) and capital expenditures associated with modifying an existing drilling rig, including to upgrade its technology, acquiring a new drilling rig or otherwise replacing current drilling rigs at the end of their useful lives to the extent these expenditures are incurred to maintain or replace the operating capacity of OPCO’s fleet. These expenditures could vary significantly from quarter to quarter and could increase as a result of changes in:

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Our operating agreement requires our board of directors to deduct estimated maintenance and replacement capital expenditures, instead of actual maintenance and replacement capital expenditures, from operating surplus each quarter in an effort to reduce fluctuations in operating surplus as a result of variations in actual maintenance and replacement capital expenditures each quarter. The amount of estimated maintenance and replacement capital expenditures deducted from operating surplus is subject to review and change by our conflicts committee at least once a year. In years when estimated maintenance and replacement capital expenditures are higher than actual maintenance and replacement capital expenditures, the amount of cash available for distribution to unitholders will be lower than if actual maintenance and replacement capital expenditures were deducted from operating surplus. If our board of directors underestimates the appropriate level of estimated maintenance and replacement capital expenditures, we may have less cash available for distribution in future periods when actual capital expenditures exceed our previous estimates.

If capital expenditures are financed through cash from operations or by issuing debt or equity securities, our ability to make cash distributions may be diminished, our financial leverage could increase or our unitholders could be diluted.

Use of cash from operations to expand or maintain OPCO’s fleet will reduce cash available for OPCO to distribute to us and us to distribute to our unitholders. Our ability and that of OPCO to obtain bank financing or our ability to access debt and equity capital markets may be limited by our financial condition or that of OPCO, respectively, at the time of any such financing or offering as well as by adverse market conditions resulting from, among other things, general economic conditions, changes in the offshore drilling industry and contingencies and uncertainties that are beyond our control. Failure to obtain the funds for future capital expenditures could have a material adverse effect on our business, results of operations and financial condition and on our ability to make cash distributions. Even if we are successful in obtaining necessary funds, the terms of any debt financings could limit OPCO’s ability to pay distributions to us and our ability to pay cash distributions to unitholders. In addition, incurring additional debt may significantly increase our interest expense and financial leverage, and issuing additional equity securities may result in significant unitholder dilution and would increase the aggregate amount of cash required to pay the minimum quarterly distribution to unitholders, both of which could have a material adverse effect on our ability to make cash distributions.

OPCO’s debt levels may limit its or our flexibility in obtaining additional financing, pursuing other business opportunities and paying distributions to unitholders.

Upon completion of this offering and the related transactions, we estimate that our consolidated debt (including indebtedness outstanding under OPCO’s financing agreements) will be approximately $           million. Following this offering, we will continue to have the ability to incur additional debt. Please read “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources.”

OPCO’s level of debt could have important consequences to it and us, including the following:

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Our ability to service our consolidated debt will depend upon, among other things, our future financial and operating performance, which will be affected by prevailing economic conditions and financial, business, regulatory and other factors, some of which are beyond our control. If our operating results are not sufficient to service our consolidated current or future indebtedness, we will be forced to take actions such as reducing distributions, reducing or delaying our business activities, acquisitions, investments or capital expenditures, selling assets, restructuring or refinancing our consolidated debt, or seeking additional equity capital or bankruptcy protection. We may not be able to effect any of these remedies on satisfactory terms, or at all.

Furthermore, OPCO’s financing agreements contain cross-default clauses which are linked to other indebtedness of Seadrill. In the event of a default by Seadrill under one of its other credit facilities, we could be adversely affected by the cross-default clauses, even if Seadrill cures any such default.

Financing agreements containing operating and financial restrictions and other covenants may restrict OPCO’s and our business and financing activities.

The operating and financial restrictions and covenants in the financing agreements of Seadrill, OPCO or us and any future financing agreements of Seadrill, OPCO or us, could adversely affect our ability and that of OPCO, respectively, to finance future operations or capital needs or to engage, expand or pursue our business activities. For example, subject to certain exceptions, the financing agreements may restrict our ability or that of OPCO to:

For more information, please read “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources.”

OPCO’s ability to comply with the restrictions and covenants, including financial ratios and tests, contained in any financing agreements of Seadrill, OPCO or us is dependent on future performance and may be affected by events beyond its control, including prevailing economic, financial and industry conditions. If market or other economic conditions deteriorate, OPCO’s ability to comply with these covenants may be impaired. If OPCO is

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unable to comply with the restrictions and covenants in the agreements governing its indebtedness or in current or future debt financing agreements, there could be a default under the terms of those agreements. If a default occurs under these agreements, lenders could terminate their commitments to lend and/or accelerate the outstanding loans and declare all amounts borrowed due and payable. OPCO pledges its drilling rigs as security for its indebtedness. If OPCO’s lenders were to foreclose on OPCO’s drilling rigs in the event of a default, this may adversely affect its and our ability to finance future operation or capital needs or to engage, expand or pursue our business activities. In addition, all of OPCO’s loan agreements contain cross-default provisions, meaning that if OPCO is in default under one of its loan agreements, amounts outstanding under its other loan agreements may also be accelerated and become due and payable. If any of these events occur, we cannot guarantee that OPCO’s assets will be sufficient to repay in full all of its outstanding indebtedness, and OPCO may be unable to find alternative financing. Even if OPCO could obtain alternative financing, that financing might not be on terms that are favorable or acceptable. Any of these events would adversely affect our ability to make distributions to our unitholders and cause a decline in the market price of our common units. Please read “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Borrowing Activities.”

Restrictions in OPCO’s debt agreements may prevent it or us from paying distributions.

The payment of principal and interest on OPCO’s debt will reduce cash available for distribution to us and to our unitholders. In addition, OPCO’s current financing agreements contain provisions that, upon the occurrence of certain events, permit lenders to terminate their commitments and/or accelerate the outstanding loans and declare all amounts due and payable, which may prevent us from paying distributions to our unitholders. These events include, among others:

In connection with this offering, OPCO will enter into a $300 million revolving credit facility with Seadrill, as the lender, which we refer to as the sponsor credit facility. The sponsor credit facility will contain customary covenants and provisions relating to events of default. Furthermore, we expect that OPCO’s future financing agreements will contain similar provisions. For more information regarding these financing agreements, please read “Management’s Discussion and Analysis of Financial Conditions and Results of Operations—Liquidity and Capital Resources—Borrowing Activities.”

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Seadrill’s failure to comply with covenants and other provisions in its existing or future financing agreements could result in cross-defaults under OPCO’s existing financing agreements, which would have a material adverse effect on us.

OPCO’s existing financing agreements contain cross-default provisions that may be triggered if Seadrill defaults under the terms of its existing or future financing agreements. In the event of a default by Seadrill under one of its financing agreements, the lenders under OPCO’s existing financing agreements could determine that OPCO is in default under its financing agreements. This could result in the acceleration of the maturity of such debt under these agreements and the lenders thereunder may foreclose upon any collateral securing that debt, including OPCO’s drilling rigs, even if Seadrill were to subsequently cure its default. In the event of such acceleration and foreclosure, OPCO might not have sufficient funds or other assets to satisfy all of its obligations, which would have a material adverse effect on our business, results of operations and financial condition and would significantly reduce our ability, or make us unable, to make distributions to our unitholders for so long as such default is continuing.

The failure to consummate or integrate acquisitions in a timely and cost-effective manner could have an adverse effect on our financial condition and results of operations.

Acquisitions that expand our drilling operations are an important component of our business strategy. For example, we intend to purchase the T-15 and the T-16 from Seadrill if we are able to reach an agreement with Seadrill regarding their purchase price. Under the omnibus agreement that we will enter into with Seadrill in connection with the closing of this offering, we and OPCO will have the right to purchase the T-15 and the T-16 from Seadrill at any time within 24 months after their respective acceptance by the customer under the applicable drilling contract. We will not be obligated to purchase either of these drilling rigs at the applicable determined price, and, accordingly, we may not complete the purchase of either of such drilling rigs.

We believe that other acquisition opportunities may arise from time to time, and any such acquisition could be significant. Any acquisition could involve the payment by us of a substantial amount of cash, the incurrence of a substantial amount of debt or the issuance of a substantial amount of equity. Certain acquisition and investment opportunities may not result in the consummation of a transaction. In addition, we may not be able to obtain acceptable terms for the required financing for any such acquisition or investment that arises. We cannot predict the effect, if any, that any announcement or consummation of an acquisition would have on the trading price of our common units. Our future acquisitions could present a number of risks, including the risk of incorrect assumptions regarding the future results of acquired operations or assets or expected cost reductions or other synergies expected to be realized as a result of acquiring operations or assets, the risk of failing to successfully and timely integrate the operations or management of any acquired businesses or assets and the risk of diverting management’s attention from existing operations or other priorities. We may also be subject to additional costs related to compliance with various international laws in connection with such acquisition. If we fail to consummate and integrate our acquisitions in a timely and cost-effective manner, our financial condition, results of operations and cash available for distribution could be adversely affected.

Our growth depends on the level of activity in the offshore oil and natural gas industry, which is significantly affected by, among other things, volatile oil and natural gas prices, and may be materially and adversely affected by a decline in the offshore oil and natural gas industry.

The offshore drilling industry is cyclical and volatile. Our growth strategy focuses on expansion in the offshore drilling sector, which depends on the level of activity in oil and natural gas exploration, development and production in offshore areas worldwide. The availability of quality drilling prospects, exploration success, relative production costs, the stage of reservoir development and political and regulatory environments affect customers’ drilling programs. Oil and natural gas prices and market expectations of potential changes in these prices also significantly affect this level of activity and demand for drilling rigs.

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Oil and natural gas prices are extremely volatile and are affected by numerous factors beyond our control, including the following:

Declines in oil and natural gas prices for an extended period of time, or market expectations of potential decreases in these prices, could negatively affect our future growth. Sustained periods of low oil and natural gas prices typically result in reduced exploration and drilling because oil and natural gas companies’ capital expenditure budgets are subject to cash flow from such activities and are therefore sensitive to changes in energy prices. These changes in commodity prices can have a dramatic effect on rig demand, and periods of low demand can cause excess rig supply and intensify the competition in the industry which often results in drilling rigs, particularly older and less technologically-advanced drilling rigs, being idle for long periods of time. We cannot predict the future level of demand for drilling rigs or future conditions of the oil and natural gas industry. Any decrease in exploration, development or production expenditures by oil and natural gas companies could reduce our revenues and materially harm our business, results of operations and cash available for distribution.

In addition to oil and natural gas prices, the offshore drilling industry is influenced by additional factors, including: