Document:

EX-10.4

 Exhibit 10.4 

FORM OF 
 OMNIBUS
AGREEMENT 
 AMONG 

OCEAN RIG UDW INC. 

OCEAN RIG MLP HOLDINGS INC. 

OCEAN RIG PARTNERS GP LLC 

OCEAN RIG PARTNERS LP 

OCEAN RIG OPERATING PARTNERS GP LLC 

OCEAN RIG OPERATING LP 

 TABLE OF CONTENTS 

ARTICLE I 
 DEFINITIONS 

 

							
			
	 Section 1.1
	 	Definitions	  	 	1	  
		
	ARTICLE II	  			
		
	THREE-YEAR DRILLING UNIT RESTRICTED BUSINESS OPPORTUNITIES	  			
			
	 Section 2.1
	 	Three-Year Drilling Unit Restricted Businesses	  	 	6	  
			
	 Section 2.2
	 	Permitted Exceptions	  	 	7	  
		
	ARTICLE III	  			
		
	BUSINESS OPPORTUNITIES PROCEDURES	  			
	 Section 3.1
	 	Procedures	  	 	8	  
			
	 Section 3.2
	 	Scope of Prohibition	  	 	9	  
			
	 Section 3.3
	 	Enforcement	  	 	9	  
		
	ARTICLE IV	  			
		
	RIGHTS OF FIRST OFFER	  			
	 Section 4.1
	 	Rights of First Offer	  	 	9	  
			
	 Section 4.2
	 	Procedures for Rights of First Offer	  	 	10	  
		
	ARTICLE V	  			
		
	RIGHTS TO PURCHASE ADDITIONAL INTERESTS IN OPCO, WHICH OWNS THE OCEAN RIG ATHENA, OCEAN RIG MYLOS AND OCEAN RIG SKYROS	  			
			
	 Section 5.1
	 	Rights to Purchase Additional Interests in OPCO, which owns the Ocean Rig Athena, Ocean Rig Mylos and Ocean Rig Skyros	  	 	10	  
			
	 Section 5.2
	 	Procedures	  	 	10	  
		
	ARTICLE VI	  			
		
	RIGHTS TO PURCHASE THE OCEAN RIG CORCOVADO, OCEAN RIG OLYMPIA, OCEAN RIG POSEIDON, OCEAN RIG MYKONOS, THE LEIV EIRIKSSON AND THE EIRIK RAUDE	  			
			
	 Section 6.1
	 	Rights to Purchase the Ocean Rig Corcovado, the Ocean Rig Olympia, the Ocean Rig Poseidon, the Ocean Rig Mykonos, the Leiv Eiriksson and the Eirik Raude	  	 	12	  
			
	 Section 6.2
	 	Procedures	  	 	12	  

  
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	ARTICLE VII	  
	
	RIGHTS TO PURCHASE ANY FUTURE NEWBUILDINGS AND SECONDHAND VESSELS OF OCEAN RIG	  
			
	 Section 7.1
	 	Rights to Purchase Any Future Newbuildings and Secondhand Vessels of Ocean Rig	  	 	14	  
			
	 Section 7.2
	 	Procedures	  	 	14	  
		
	ARTICLE VIII I	  			
		
	INDEMNIFICATION	  			
			
	 Section 8.1
	 	Ocean Rig Indemnification	  	 	16	  
			
	 Section 8.2
	 	Limitation Regarding Indemnification	  	 	17	  
			
	 Section 8.3
	 	Indemnification Procedures	  	 	17	  
		
	ARTICLE IX	  			
		
	MISCELLANEOUS	  			
			
	 Section 9.1
	 	Choice of Law; Submission To Jurisdiction	  	 	18	  
			
	 Section 9.2
	 	Notice	  	 	18	  
			
	 Section 9.3
	 	Entire Agreement	  	 	19	  
			
	 Section 9.4
	 	Termination	  	 	19	  
			
	 Section 9.5
	 	Waiver; Effect of Waiver or Consent	  	 	19	  
			
	 Section 9.6
	 	Amendment or Modification	  	 	19	  
			
	 Section 9.7
	 	Assignment	  	 	19	  
			
	 Section 9.8
	 	Counterparts	  	 	20	  
			
	 Section 9.9
	 	Severability	  	 	20	  
			
	 Section 9.10
	 	Gender, Parts, Articles and Sections	  	 	20	  
			
	 Section 9.11
	 	Further Assurances	  	 	20	  
			
	 Section 9.12
	 	Withholding or Granting of Consent	  	 	20	  
			
	 Section 9.13
	 	Laws and Regulations	  	 	20	  
			
	 Section 9.14
	 	Negotiation of Rights of Ocean Rig, Partners, Assignees and Third Parties	  	 	20	  

  
 ii 

 OMNIBUS AGREEMENT 

THIS OMNIBUS AGREEMENT is entered into on, and effective as of, the Closing Date (as defined herein), among Ocean Rig UDW Inc.,
a corporation organized under the laws of the Marshall Islands (“Ocean Rig”), Ocean Rig MLP Holdings, Inc., a corporation organized under the laws of the Marshall Islands, Ocean Rig Partners LP, a
Marshall Islands limited partnership (the “Partnership”), Ocean Rig Partners GP LLC, a Marshall Islands limited liability company and general partner of the Partnership (including any permitted
successors and assigns under the Operating Agreement (as defined herein)) (the “Ocean Rig General Partner”), Ocean Rig Operating LP, a Marshall Islands limited partnership
(“OPCO”) and Ocean Rig Operating Partners GP LLC, a Marshall Islands limited liability company and the general partner of OPCO (“OPCO GP”).

 R E C I T A L S: 

1. The Parties desire by their execution of this Agreement to evidence their understanding, as more fully set forth in Articles II
and III, with respect to (a) those business opportunities that the Ocean Rig Entities (as defined herein) will not pursue during the term of this Agreement and (b) the procedures whereby such business opportunities are to be offered
to the Partnership Group (as defined herein). 
 2. The Parties desire by their execution of this Agreement to evidence their understanding,
as more fully set forth in Article IV, with respect to the Company’s right of first offer relating to Three-Year Drilling Units (as defined herein) that Ocean Rig might own. 

3. The Parties desire by their execution of this Agreement to evidence their understanding, as more fully set forth in
Article V, with respect to the rights of the Partnership to purchase additional interests in OPCO, which indirectly owns the Ocean Rig Athena, Ocean Rig Mylos and Ocean Rig Skyros, from Ocean Rig. 

4. The Parties desire by their execution of this Agreement to evidence their understanding, as more fully set forth in
Article VI, with respect to the rights of the Partnership to purchase interests in the Ocean Rig Corcovado, the Ocean Rig Olympia, the Ocean Rig Poseidon, the Ocean Rig Mykonos, the Leiv Eiriksson and
the Eirik Raude from Ocean Rig. 
 5. The Parties desire by their execution of this Agreement to evidence their understanding,
as more fully set forth in Article VII, with respect to the rights of the Partnership to purchase interests in the certain newbuilding and secondhand vessels that Ocean Rig may acquire in the future, including but not limited to the
Ocean Rig Apollo, the Ocean Rig Santorini and two additional drilling units to be named from Ocean Rig. 
 6. The Parties
desire by their execution of this Agreement to evidence their understanding, as more fully set forth in
 Section 5.2(b)(ii), Section 6.2(b)(ii), Section 7.2(b)(ii) and Article VIII, with respect to
certain indemnification obligations of Ocean Rig. 
 In consideration of the premises and the covenants, conditions, and agreements
contained herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows: 

ARTICLE I 
 DEFINITIONS

 Section 1.1 Definitions. 

As used in this Agreement, the following terms shall have the respective meanings set forth below: 

“Affiliate” means, with respect to any Person, any other Person that directly
or indirectly through one or more intermediaries controls, is controlled by or is under common control with, the Person in question. As used herein, the term “control” means the possession, direct or indirect, of the power to
direct or cause the direction of the management and policies of a Person, whether through ownership of voting securities, by contract or otherwise. 

 “Additional Fleet Interests”
has the meaning given such term in Section 5.1. 
 “Agreement”
means this Omnibus Agreement, as it may be amended, modified, or supplemented from time to time in accordance with Section 8.6 hereof. 

“Board” means the Board of Directors of the Ocean Rig General Partner.

 “Break-up Costs” means the aggregate amount of any and all additional taxes,
flag administration, financing, legal and other similar costs (except with respect to Section 2.2(b) where Break-up Costs shall be deemed to include only administrative costs associated with transfer and re-flagging, including related
legal costs) to the Ocean Rig Entities that would be required to transfer Three-Year Drilling Units acquired by the Ocean Rig Entities as part of a larger transaction to a Partnership Group Member pursuant to Section 2.2(b) or
Section 2.2(d)(i). 
 “Change of Control” means, with respect
to any Person (the “Applicable Person”), any of the following events: (a) any sale, lease, exchange or other transfer (in one transaction or a series of related transactions) of all or
substantially all of the Applicable Person’s assets to any other Person, unless immediately following such sale, lease, exchange or other transfer such assets are owned, directly or indirectly, by the Applicable Person; (b) the
consolidation or merger of the Applicable Person with or into another Person pursuant to a transaction in which the outstanding Voting Securities of the Applicable Person are changed into or exchanged for cash, securities or other property, other
than any such transaction where (i) the outstanding Voting Securities of the Applicable Person are changed into or exchanged for Voting Securities of the surviving Person or its parent and (ii) the holders of the Voting Securities of the
Applicable Person immediately prior to such transaction own, directly or indirectly, not less than a majority of the outstanding Voting Securities of the surviving Person or its parent immediately after such transaction; or (c) a
“person” or “group” (within the meaning of Sections 13(d) or 14(d)(2) of the Exchange Act), other than Ocean Rig or its Affiliates with respect
to the Ocean Rig General Partner, being or becoming the “beneficial owner” (as defined in Rules 13d-3 and 13d-5 under the Exchange Act) of more than 50% of all of the then outstanding Voting
Securities of the Applicable Person, except in a merger or consolidation which would not constitute a Change of Control under clause (b) above. 

“Closing Date” means the date of the closing of the initial public offering
of common units representing limited partner interests in the Partnership. 

“Conflicts Committee” means the Conflicts Committee of the Board of the
Ocean Rig General Partner. 
 “ConocoPhillips” means
ConocoPhillips Angola 36 and ConocoPhillips Angola 36, which are currently the charterers of the Ocean Rig Athena. 

“Contribution Assets” has the meaning given such term in
Section 7.1. 
 “Covered Environmental Losses”
means all Losses suffered or incurred by the Partnership Group by reason of, arising out of or resulting from: 

(a) any violation or correction of violation of Environmental Laws; or 

  
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 (b) any event or condition relating to environmental or human health and safety
matters, in each case, associated with the ownership or operation by the Partnership Group or the Ocean Rig Entities of the Contribution Assets (including, without limitation, the presence of Hazardous Substances on, under, about or migrating to or
from the Contribution Assets or the disposal or release of, or exposure to, Hazardous Substances generated by or otherwise related to operation of the Contribution Assets), including, without limitation, the reasonable and documented cost and
expense of (i) any investigation, assessment, evaluation, monitoring, containment, cleanup, repair, restoration, remediation or other corrective action required or necessary under Environmental Laws, (ii) the preparation and implementation
of any closure, remedial, corrective action or other plans required or necessary under Environmental Laws and (iii) any environmental or toxic tort (including, without limitation, personal injury or property damage claims) pre-trial, trial or
appellate legal or litigation support work; 
 but only to the extent that such violation complained of under clause (a), or such events or
conditions included in clause (b), occurred before the Closing Date; and, provided, that in no event shall Losses to the extent arising from a change in any Environmental Law after the Closing Date be deemed
“Covered Environmental Losses.” 

“ENI” means ENI Angola S.p.A, which is currently the charterer of the Ocean Rig Poseidon.

 “Environmental Laws” means all international, federal, state,
foreign and local laws, statutes, rules, regulations, treaties, conventions, orders, judgments and ordinances having the force and effect of law and relating to protection of natural resources, health and safety and the environment, each in effect
and as amended through the Closing Date. 
 “Eirik Raude”
means the rig which will be under charter with Lukoil. 
 “Eirik Raude
Interests” means all of Ocean Rig’s rights, title and interests in the Eirik Raude, including shares of capital stock of any Ocean Rig Entity holding ownership interests in the
Eirik Raude and including any drilling contracts or other agreements relating to the operation or ownership of the Eirik Raude then in effect. 

“Exchange Act” means the Securities Exchange Act
of 1934, as amended. 
 “First Offer Negotiation Period” has
the meaning given such term in Section 4.2(b). 
 “Hazardous
Substances” means (a) each substance defined, designated or classified as a hazardous waste, hazardous substance, hazardous material, solid waste, contaminant or toxic substance under Environmental Laws;
(b) petroleum and petroleum products, including crude oil and any fractions thereof; (c) natural gas, synthetic gas and any mixtures thereof; (d) any radioactive material; and (e) any asbestos-containing materials in a friable
condition. 
 “Leiv Eiriksson” means the rig currently under
charter with Rig Management Norway. 
 “Leiv Eiriksson
Interests” means all of Ocean Rig’s rights, title and interests in the Leiv Eiriksson, including shares of capital stock of any Ocean Rig Entity holding ownership
interests in the Leiv Eiriksson and including any drilling contracts or other agreements relating to the operation or ownership of the Leiv Eiriksson then in effect.

 “Losses” means losses, damages, liabilities, claims, demands, causes of
action, judgments, settlements, fines, penalties, costs and expenses (including, without limitation, court costs and reasonable attorneys’ and experts’ fees) of any and every kind or character; provided, however, that such
term shall not include any special, indirect, incidental or consequential damages. 

  
 3 

 “Lukoil” means Lukoil Overseas
Ivory Coast, which is currently the charter of the Eirik Raude. 

“Non-Three-Year Drilling Unit” means any drilling rig or drillship that is
not a Three-Year Drilling Unit. 
 “Ocean Rig Apollo” means
the drillship to be delivered to Ocean Rig in 2015 and which will be under charter with Total E&P Congo. 

“Ocean Rig Apollo Interests” means all of Ocean Rig’s rights, title and
interests in the Ocean Rig Apollo, including shares of capital stock of any Ocean Rig Entity holding ownership interests in the Ocean Rig Apollo and including any drilling
contracts or other agreements relating to the operation or ownership of the Ocean Rig Apollo then in effect. 

“Ocean Rig Athena” means the drillship currently under charter with
ConocoPhillips. 
 “Ocean Rig Athena Interests” means all of
Ocean Rig’s rights, title and interests in the Ocean Rig Athena, including shares of capital stock of any Ocean Rig Entity holding ownership interests in the Ocean Rig Athena
and including any drilling contracts or other agreements relating to the operation or ownership of the Ocean Rig Athena then in effect. 

“Ocean Rig Corcovado” means the drillship currently under charter with
Petrobras. 
 “Ocean Rig Corcovado Interests” means all of
Ocean Rig’s rights, title and interests in the Ocean Rig Corcovado, including shares of capital stock of any Ocean Rig Entity holding ownership interests in the Ocean Rig
Corcovado and including any drilling contracts or other agreements relating to the operation or ownership of the Ocean Rig Corcovado then in effect. 

“Ocean Rig Entities” means Ocean Rig and any Person controlled, directly or
indirectly, by Ocean Rig, other than the Partnership Entities. 
 “Ocean Rig General
Partner” is defined in the introduction to this Agreement. 

“Ocean Rig Management” means Ocean Rig Management Inc, a wholly owned
subsidiary of Ocean Rig. 
 “Ocean Rig Mykonos” means the
drillship currently under charter with Petrobras. 
 “Ocean Rig Mykonos
Interests” means all of Ocean Rig’s rights, title and interests in the Ocean Rig Mykonos, including shares of capital stock of any Ocean Rig Entity holding ownership interests in the
Ocean Rig Mykonos and including any drilling contracts or other agreements relating to the operation or ownership of the Ocean Rig Mykonos then in effect. 

“Ocean Rig Mylos” means the drillship currently under charter with
Repsol. 
 “Ocean Rig Mylos Interests” means all of Ocean
Rig’s rights, title and interests in the Ocean Rig Mylos, including shares of capital stock of any Ocean Rig Entity holding ownership interests in the Ocean Rig Mylos and
including any drilling contracts or other agreements relating to the operation or ownership of the Ocean Rig Mylos then in effect. 

“Ocean Rig Olympia” means the drillship currently under charter with
Total. 

  
 4 

 “Ocean Rig Olympia Interests”
means all of Ocean Rig’s rights, title and interests in the Ocean Rig Olympia, including shares of capital stock of any Ocean Rig Entity holding ownership interests in the Ocean Rig
Olympia and including any drilling contracts or other agreements relating to the operation or ownership of the Ocean Rig Olympia then in effect. 

“Ocean Rig Poseidon” means the drillship currently under charter with
Eni. 
 “Ocean Rig Poseidon Interests” means all of Ocean
Rig’s rights, title and interests in the Ocean Rig Poseidon, including shares of capital stock of any Ocean Rig Entity holding ownership interests in the Ocean Rig Poseidon
and including any drilling contracts or other agreements relating to the operation or ownership of the Ocean Rig Poseidon then in effect. 

“Ocean Rig Santorini” means the drillship expected to be delivered to Ocean
Rig in 2016. 
 “Ocean Rig Santorini Interests” means all of
Ocean Rig’s rights, title and interests in the Ocean Rig Santorini, including shares of capital stock of any Ocean Rig Entity holding ownership interests in the Ocean Rig
Santorini and including any drilling contracts or other agreements relating to the operation or ownership of the Ocean Rig Santorini then in effect. 

“Ocean Rig Skyros” means the drillship currently under charter with Total
and Total E&P Angola. 
 “Ocean Rig Skyros Interests”
means all of Ocean Rig’s rights, title and interests in the Ocean Rig Skyros, including shares of capital stock of any Ocean Rig Entity holding ownership interests in the Ocean Rig
Skyros and including any drilling contracts or other agreements relating to the operation or ownership of the Ocean Rig Skyros then in effect. 

“Offer” has the meaning given such term in Section 3.1. 

“Offered Assets” has the meaning given such term in
Section 3.1. 
 “Offeree” has the meaning given such term in
Section 3.1. 
 “Offer Period” has the meaning
given such term in Section 3.1. 
 “OPCO” is
defined in the introduction to this Agreement. 
 “OPCO GP”
is defined in the introduction to this Agreement. 
 “Operating
Agreement” means the Second Amended and Restated Limited Partnership Agreement of the Partnership, dated as of ,              2014, as such agreement is in
effect on the Closing Date, to which reference is hereby made for all purposes of this Agreement. No amendment or modification to the Partnership Agreement subsequent to the Closing Date shall be given effect for purposes of this Agreement unless
consented to by each of the Parties to this Agreement. 
 “Optional Drilling Unit
Interests” has the meaning given such term in Section 6.1. 

“Parties” means the parties to this Agreement and their successors and
permitted assigns. 
 “Partnership” is defined in the
introduction to this Agreement. 
 “Partnership Entities”
means the Ocean Rig General Partner, the Partnership, OPCO GP and OPCO and any Person controlled by any such entity. 

  
 5 

 “Partnership Group” means the
Partnership, OPCO and any Person controlled by any such entity. 
 “Partnership Group
Member” means any Person in the Partnership Group. 

“Person” means an individual, corporation, partnership, joint venture,
trust, limited liability company, unincorporated organization or any other entity. 

“Petrobras” means Petrobras Brazil, which is currently the charterer of the
Ocean Rig Corcovado and the Ocean Rig Mykonos. 

“Potential Transferee” has the meaning given such term in
Section 4.2(a). 
 “Premier Oil” means Premier
Oil Exploration and Production Ltd., which will be the charter of the Eirik Raude. 

“Repsol” means Repsol Sinopec Brasil S.A., which is currently the charterer
of the Ocean Rig Mylos.  
 “Rig Management
Norway” means Rig Management Norway AS, which is currently the charter of the Leiv Eiriksson. 

“Sale Assets” has the meaning given such term in Section 4.2(a). 

“Three-Year Drilling Units” means any drilling unit or drillship operating
under a charter for three or more years, together with the related charter. 

“Total” means Total E&P Angola and Total E&P Angola Block 32, which
is currently the charterer of the Ocean Rig Skyros and the Ocean Rig Olympia.  

“Total Congo” means Total E&P Congo, which will be the
charterer for the Ocean Rig Apollo. 

“Transfer” means any transfer, assignment, sale or other disposition of any
(a) Three-Year Drilling Unit by any Ocean Rig Entity, (b) equity interest in OPCO by Ocean Rig; provided, however, that such term shall not include (i) transfers, assignments, sales or other dispositions from a Ocean Rig
Entity to another Ocean Rig Entity, or from a Partnership Group Member to another Partnership Group Member, (ii) transfers, assignments, sales or other dispositions pursuant to the terms of any related charter or other agreement with a charter
party; (iii) transfers, assignments, sales or other dispositions pursuant to Article II of this Agreement; or (iv) grants of security interests in or mortgages or liens on such Three-Year Drilling Units in favor of a bona fide third party
lender (but not the foreclosing of any such security interest, mortgage or lien). 

“Transfer Notice” has the meaning given such term in
Section 4.2(a). 
 “Transferring Party” has the
meaning given such term in Section 4.2(a). 
 “Voting
Securities” means securities of any class of Person entitling the holders thereof to vote in the election of members of the board of directors or other similar governing body of the Person. 

ARTICLE II 
 THREE-YEAR
DRILLING UNIT RESTRICTED BUSINESS OPPORTUNITIES 
 Section 2.1 Three-Year Drilling Unit Restricted Businesses. 

Subject to Section 9.4 and except as permitted by Section 2.2, each of the Ocean Rig Entities shall be prohibited from
acquiring, owning, operating or chartering Three-Year Drilling Units. 

  
 6 

 Section 2.2 Permitted Exceptions. 

Notwithstanding any provision of Section 2.1 to the contrary, the restrictions in this Agreement shall not prevent any Ocean Rig
Entity from: 
 (a) acquiring, owning, operating or chartering any Non-Three-Year Drilling Unit; 

(b) acquiring one or more Three-Year Drilling Units if such Ocean Rig Entity offers to sell to such Three-Year Drilling Unit to the
Partnership for the acquisition price plus any Break-up Costs in accordance with the procedures set forth in Section 3.1; 
 (c)
putting a Non-Three-Year Drilling Unit under charter for three or more years if such Ocean Rig Entity offers to sell such Non-Three-Year Drilling Unit to the Partnership for fair market value (x) after the time it becomes a Three-Year Drilling
Unit and (y) at each renewal or extension of that charter for three or more years, in each case in accordance with the procedures set forth in Section 3.1; 

(d) acquiring one or more Three-Year Drilling Units as part of the acquisition of a controlling interest in a business or pack Three-Year age
of assets and owning, operating or chartering such Three-Year Drilling Unit(s); provided, however, that: 
 (i)
if less than a majority of the value of the business or assets acquired is attributable to Three-Year Drilling Units, as determined in good faith by Ocean Rig’s board of directors, the Ocean Rig Entity must offer to sell such Three-Year
Drilling Unit(s) to the Partnerships for their fair market value plus any Break-up Costs in accordance with the procedures set forth in Section 3.1; and 

(ii) if a majority or more of the value of the business or assets acquired is attributable to Three-Year Drilling Units, as
determined in good faith by Ocean Rig’s board of directors, Ocean Rig shall notify the Partnership of the proposed acquisition in writing. The Partnership shall, not later than the 10th
calendar day following receipt of such notice, notify Ocean Rig if it or any other Partnership Group Member wishes to acquire any Three-Year Drilling Unit forming part of that business or package of assets in cooperation and simultaneously with the
Ocean Rig Entity acquiring the Non-Three-Year Drilling Units forming part of that business or package of assets. If the Partnership does not notify Ocean Rig of its intent to pursue the acquisition within such 10 calendar days, the Ocean Rig Entity
may proceed with the acquisition and then offer to sell Three-Year Drilling Units to the Partnership as provided in subsection (i) above; 

(e) acquiring a non-controlling interest in any company, business or pool of assets; 

(f) acquiring, owning, operating or chartering any Three-Year Drilling Unit if the Partnership does not fulfill its obligation to purchase
such Three-Year Drilling Unit in accordance with the terms of any existing or future agreement; 
 (g) acquiring, owning, operating or
chartering any Three-Year Drilling Unit that is subject to an offer to purchase by a Partnership Group Member as described in paragraphs (b), (c) and (d) above, in each case pending the offer of such Three-Year Drilling Unit to the
Partnership and the Partnership’s determination pursuant to Section 3.1 whether to purchase the Three-Year Drilling Unit and, if the Partnership has determined to purchase or to cause any Partnership Group Member to purchase such
Three-Year Drilling Unit, pending the closing of such purchase; 
 (h) providing ship management services relating to any drilling rig or
drillship; or 

  
 7 

 (i) acquiring, owning, operating or chartering any Three-Year Drilling Unit if the Partnership
has previously advised Ocean Rig that it consents to such acquisition, operation or charter. 
 ARTICLE III 

BUSINESS OPPORTUNITIES PROCEDURES 

Section 3.1 Procedures. 

In the event that an Ocean Rig Entity acquires, operates or puts under charter Three-Year Drilling Units in accordance with Sections
2.2(b), 2.2(c) or 2.2(d)(i), then not later than 15 calendar days after the consummation of the acquisition or the commencement of operations or charter, such acquiring Party (the “Acquiring Party”) shall notify
the Board and offer the Board (an “Offeree”) the opportunity for any Partnership Group Member to purchase such Three-Year Drilling Units (the “Offered Assets”), for their fair market value (or, in the case of an
acquisition in accordance with Section 2.2(b), the acquisition price) plus, in the case of an acquisition in accordance with Sections 2.2(b),or 2.2(d)(i), any applicable Break-up Costs, in each case on commercially
reasonable terms in accordance with this Section 3.1 (the “Offer”). The Offer shall set forth the Acquiring Party’s proposed terms relating to the purchase of the Offered Assets by the applicable Partnership Group
Member, including any liabilities to be assumed by the applicable Partnership Group Member as part of the Offer. As soon as practicable after the Offer is made, the Acquiring Party will deliver to the Offeree all information prepared by or on behalf
of or in the possession of such Acquiring Party relating to the Offered Assets and reasonably requested by the Offeree. As soon as practicable, but in any event, within 15 calendar days after receipt of the Offer, the Offeree shall notify the
Acquiring Party in writing that either: 
 (a) The Board has elected not to cause any Partnership Group Member to purchase such Offered
Assets, in which event the Acquiring Party and its Affiliates shall, (including Section 2.2(b)), be forever free, subject to the provisions of this Agreement, to continue to own, operate and charter such Offered Assets; or 

(b) The Board has elected to cause any Partnership Group Member to purchase such Offered Assets, in which event the following procedures shall
be followed: 
 (i) After the receipt of the Offer by the Offeree, the Acquiring Party and the Offeree shall negotiate in
good faith regarding the fair market value (and any applicable Break-up Costs) of the Offered Assets that are subject to the Offer and the other terms of the Offer on which the Offered Assets will be sold to the applicable Partnership Group Member.
If the Acquiring Party and the Offeree agree on the fair market value (and any applicable Break-up Costs) of the Offered Assets that are subject to the Offer and the other terms of the Offer during the 15-day period (the “Offer
Period”) after receipt by the Acquiring Party of the Board’s election to cause any Partnership Group Member to purchase the Offered Assets, the Board shall cause any Partnership Group Member to purchase the Offered Assets on such terms
as soon as commercially practicable after such agreement has been reached. 
 (ii) If the Acquiring Party and the Offeree are
unable to agree on the fair market value (and any applicable Break-up Costs) of the Offered Assets that are subject to the Offer or on any other terms of the Offer during the Offer Period, the Acquiring Party and the Offeree will engage a
mutually-agreed-upon independent investment banking firm, rig broker or other expert advisor prior to the end of the Offer Period to determine the fair market value of the Offered Assets and/or the other terms on which the Acquiring Party and the
Offeree are unable to agree. In determining the fair market value of the Offered Assets and other terms on which the Offered Assets are to be sold, the independent investment banking firm, rig broker, firm generally recognized in the offshore
drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor, as applicable, will have access to the proposed sale and purchase values and terms for the Offer submitted by the
Acquiring Party and the Offeree, respectively, and to all information prepared by or on behalf of the Acquiring Party relating to the Offered Assets and reasonably requested by such independent 

  
 8 

 
investment banking firm, rig broker or other expert advisor. Such independent investment banking firm, rig broker or other expert advisor will determine the fair market value (and any applicable
Break-up Costs) of the Offered Assets and/or the other terms on which the Acquiring Party and the Offeree are unable to agree within 15 calendar days of its engagement and furnish the Acquiring Party and the Offeree its determination in writing. The
fees and expenses of the independent investment banking firm, rig broker or other expert advisor, as applicable, will be divided equally between the Acquiring Party and the Offeree. Upon receipt of such determination, the Offeree will have the
option, but not the obligation: 
 (A) to cause any Partnership Group Member to purchase the Offered Assets for the fair
market value (and any applicable Break-up Costs), and on the other terms determined by the independent investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform the tasks
for which such firm has been engaged or other expert advisor, as soon as commercially practicable after determinations have been made; or 

(B) not to cause any Partnership Group Member to purchase such Offered Assets, in which event the Acquiring Party and its
Affiliates shall, subject to the other terms of this Agreement, be forever free to continue to own and operate such Offered Assets. 

Section 3.2 Scope of Prohibition. 

If any Ocean Rig Entity or its Affiliates engages in the ownership or operation of Three-Year Drilling Units pursuant to any of the exceptions
described in Section 2.2, the Ocean Rig Entity and its Affiliates may not subsequently expand that portion of their business other than pursuant to the exceptions contained in such Section 2.2. Except as otherwise provided in
this Agreement or the Operating Agreement, each Party and its Affiliates shall be free to engage in any business activity whatsoever, including those that may be in direct competition with the Ocean Rig Entities or the Partnership Group Members.

 Section 3.3 Enforcement. 

Each Party agrees and acknowledges that the other Parties do not have an adequate remedy at law for the breach by any such Party of its
covenants and agreements set forth in this Article III, and that any breach by any such Party of its covenants and agreements set forth in this Article III would result in irreparable injury to such other Parties. Each Party further
agrees and acknowledges that any other Party may, in addition to the other remedies which may be available to such other Party, file a suit in equity to enjoin such Party from such breach, and consent to the issuance of injunctive relief to enforce
the provisions of Article III of this Agreement. 
 ARTICLE IV 

RIGHTS OF FIRST OFFER 

Section 4.1 Rights of First Offer. 

(a) The Ocean Rig Entities hereby grant the Partnership a right of first offer on any proposed Transfer of any Three-Year Drillships owned or
acquired by any Ocean Rig Entity after the Closing Date. The Parties acknowledge and agree that nothing in this Section 4.1 shall prevent or restrict the Transfer of the capital stock, equity ownership interests or other securities of
the Ocean Rig Member or the Company. 
 (b) The Parties acknowledge that all potential Transfers of Three-Year Drillships are subject to
(i) obtaining any and all written consents of governmental authorities and other non-affiliated third parties; (ii) the terms and conditions in the outstanding debt agreements of the Ocean Rig Entities and (iii) to the terms of all
other existing agreements, in respect of such Three-Year Drillship or partnership interests of OPCO, as applicable. 

  
 9 

 Section 4.2 Procedures for Rights of First Offer. 

(a) In the event that an Ocean Rig Entity (a “Transferring Party”) proposes to Transfer any
Three-Year Drilling Unit (the “Sale Assets”), prior to committing to a sale for such Transfer with any non-affiliated third party or otherwise offering to Transfer the Sale Assets to any
non-affiliated third party, such Transferring Party shall give the Partnership (a “Potential Transferee”) written notice setting forth all material terms and conditions (including, without
limitation, the purchase price or the terms of the agreement and a description of the Sale Asset(s) on which such Transferring Party desires to Transfer the Sale Assets) (a “Transfer Notice”). 

(b) After delivery of a Transfer Notice, the Transferring Party then shall be obligated to negotiate in good faith for a maximum 30-day period
following the delivery by the Transferring Party of the Transfer Notice (the “First Offer Negotiation Period”) to reach an agreement for the Transfer of such Sale Assets to the Potential Transferee
or any of its Affiliates on the terms and conditions set forth in the Transfer Notice. If no such agreement with respect to the Sale Assets is reached during the First Offer Negotiation Period, and the Transferring Party has not Transferred, or
agreed in writing to Transfer, such Sale Assets to a third party within 180 calendar days after the end of the First Offer Negotiation Period on terms generally no less favorable to the Transferring Party than those included in the Transfer Notice,
then the Transferring Party shall not thereafter Transfer any of the Sale Assets without first offering such assets to the applicable Potential Transferee in the manner provided above. Any such Transfer shall be approved by the Conflicts Committee
in accordance with the methods set forth in the Partnership’s organizational documents. 
 ARTICLE V 

Rights to Purchase Additional Interests in OPCO, which owns the Ocean Rig Athena, Ocean Rig Mylos and Ocean Rig Skyros 

Section 5.1 Rights to Purchase Additional Interests in OPCO, which owns the Ocean Rig Athena, Ocean Rig Mylos and Ocean
Rig Skyros. 
 (a) Ocean Rig hereby grants to the Partnership Group the unconditional right and option to purchase for a
respective purchase price to be agreed upon by Ocean Rig and the Partnership Group, at any time within 60 months following the Closing Date, additional interests in OPCO which owns the Ocean Rig Athena, Ocean Rig Mylos and Ocean Rig Skyros
(“Additional Fleet Interests”). 
 (b) The Parties acknowledge that the potential
transfer of the Additional Fleet Interests pursuant to this Article V is subject to (i) obtaining any and all written consents of governmental authorities and other non-affiliated third parties; (ii) the terms and conditions in
the outstanding debt agreement of the Ocean Rig entities and (iii) the terms of all other agreements existing as of the date hereof in respect of the Additional Fleet Interests including, without limitation, any rights of first refusal of the
parties to such agreements to purchase the Additional Fleet Interests. Ocean Rig hereby covenants and agrees to use its reasonable efforts to obtain any such consents required to be obtained by it in connection with the transfer of the Additional
Fleet Interests pursuant to this Article V. 
 Section 5.2 Procedures. 

(a) If a Partnership Group Member decides to exercise the option to purchase the Additional Fleet Interests, it will provide written notice to
Ocean Rig of such exercise, the purchase price it proposes to pay for the applicable Additional Fleet Interests, and the other material terms of the purchase. The decision to purchase the applicable Additional Fleet Interests, the purchase price to
be paid for the applicable Additional Fleet Interests, and the other terms of the purchase shall be approved by the Conflicts Committee. If the Partnership 

  
 10 

 
Group Member and Ocean Rig are unable to agree on the purchase price of the applicable Additional Fleet Interests and/or the other material terms, the Partnership Group Member and Ocean Rig shall
engage a mutually-agreed-upon independent investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor
to determine the fair market value of the applicable Additional Fleet Interests and/or any other material terms on which the Partnership Group Member and Ocean Rig are unable to agree. In determining the fair market value of the applicable
Additional Fleet Interests and/or the other material terms on which the applicable Additional Fleet Interests will be sold, the investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as
qualified to perform the tasks for which such firm has been engaged or other expert advisor, as applicable, will have access to the proposed sale and purchase values and terms for the offer submitted by the Partnership Group Member and Ocean Rig,
respectively, and to all information prepared by or on behalf of the Partnership Group Member and Ocean Rig with respect to the Additional Fleet Interests and reasonably requested by such investment banking firm, broker or other expert advisor. Such
investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor will determine the fair market value of the
applicable Additional Fleet Interests and/or the other terms on which the Partnership Group Member and Ocean Rig are unable to agree within 30 calendar days of its engagement and furnish the Partnership Group Member and Ocean Rig its determination
in writing. The fees and expenses of the investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor,
as applicable, will be divided equally between the Partnership Group Member and Ocean Rig. Upon receipt of such determination in writing, the Partnership Group Member will have the option, but not the obligation to purchase the applicable Additional
Fleet Interests for the fair market value and on the other terms determined by the investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform the tasks for which such firm
has been engaged or other expert advisor, as soon as commercially practicable after determinations have been made. 
 (b) If a Partnership
Group Member chooses to exercise its option to purchase the Additional Fleet Interests under Section 5.2(a), the applicable parties shall enter into a purchase and sale agreement for the purchase and sale of the applicable Additional Fleet
Interests pursuant to which Ocean Rig shall be obligated to sell the applicable Additional Fleet Interests to the Partnership Group Member and the Partnership Group Member shall be obligated to purchase such Additional Fleet Interests from Ocean
Rig. The terms of the purchase and sale agreement will include the following: 
 (i) the Partnership Group Member will
deliver a cash purchase price (unless the Partnership Group Member and Ocean Rig agree that the consideration will be paid by means of equity of the Partnership, an interest-bearing promissory note or other form of consideration); 

(ii) the Partnership Group will be entitled to the benefit of the indemnification contained in Article VIII of this
Agreement for the remaining term of such indemnification with respect to events or conditions associated with the operation of the Additional Fleet Interests and occurring before the date of acquisition of the applicable Additional Fleet Interests
by the Partnership Group Member; 
 (iii) Ocean Rig will provide customary representations and warranties with respect to
title to the applicable Additional Fleet Interests and any other such matters as the Partnership Group Member may approve, which approval will not be unreasonably withheld; 

(iv) Ocean Rig will grant to the Partnership Group Member the right, exercisable at the Partnership Group Member’s risk
and expense, to make such surveys, tests and inspections of the Ocean Rig Athena, Ocean Rig Mylos and Ocean Rig Skyros as the Partnership Group Member may deem desirable, so long as such surveys, tests or inspections do not damage the
Ocean Rig Athena, Ocean Rig  

  
 11 

 
Mylos and Ocean Rig Skyros or interfere with the activities of the Ocean Rig Entities or the chareters of the Ocean Rig Athena, Ocean Rig Mylos and Ocean Rig Skyros
thereon and so long as the Partnership Group Member has furnished Ocean Rig with evidence that adequate liability insurance is in full force and effect; 

(v) the Partnership Group Member will have the right to terminate its obligation to purchase the Additional Fleet Interests
under this Article V and the related purchase and sale agreement if the results of any searches, surveys, tests or inspections conducted pursuant to paragraph (iv) above are, in the reasonable opinion of the Partnership Group,
unsatisfactory; and 
 (vi) neither Ocean Rig nor the applicable Partnership Group Member shall have any obligation to sell
or buy the Additional Fleet Interests if any of the consents referred to in Section 5.1(b) above have not been obtained. 
 (c)
If a Partnership Group Member chooses or is deemed to have chosen not to exercise its option to purchase the Additional Fleet Interests at the price determined by the independent investment banking firm, rig broker, firm generally recognized in the
offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor under Section 5.2(a), all future rights to purchase such Additional Fleet Interests by the
Partnership Group will be extinguished. 
 ARTICLE VI 

Rights to Purchase the Ocean Rig Corcovado, Ocean Rig Olympia, Ocean Rig Poseidon, Ocean Rig Mykonos, the Leiv
Eiriksson and the Eirik Raude 
 Section 6.1 Rights to Purchase the Ocean Rig Corcovado, the
Ocean Rig Olympia, the Ocean Rig Poseidon, the Ocean Rig Mykonos, the Leiv Eiriksson and the Eirik Raude. 

(a) Ocean Rig hereby grants to the Partnership Group the unconditional right and option to purchase for a respective purchase price to be
agreed upon by Ocean Rig and the Partnership Group, at any time within 60 months following the Closing Date, Interests in the Ocean Rig Corcovado, Ocean Rig Olympia, Ocean Rig Poseidon, the Ocean Rig Mykonos, the Leiv Eiriksson
and the Eirik Raude (the “Optional Drilling Unit Interests”). Interests in the Ocean Rig Corcovado, Ocean Rig Olympia, Ocean Rig Poseidon, the Ocean Rig Mykonos shall only be sold together for these
vessels together, as a group, and not individually. 
 (b) The Parties acknowledge that the potential transfer of the Optional Drilling Unit
Interests pursuant to this Article VI is subject to: (i) obtaining any and all written consents of governmental authorities and other non-affiliated third parties; the terms and conditions in the outstanding debt agreement of the Ocean
Rig entities and (iii) the terms of all other agreements existing as of the date hereof in respect of the Optional Drilling Unit Interests including, without limitation, any rights of first refusal of the parties to such agreements to purchase
the Optional Drilling Unit Interests. Ocean Rig hereby covenants and agrees to use its reasonable efforts to obtain any such consents required to be obtained by it in connection with the transfer of the Optional Drilling Unit Interests pursuant to
this Article VI. 
 Section 6.2 Procedures. 

(a) If a Partnership Group Member decides to exercise the option to purchase the Optional Drilling Unit Interests, it will provide written
notice to Ocean Rig of such exercise, the purchase price it proposes to pay for the applicable Optional Drilling Unit Interests, and the other material terms of the purchase. The decision to purchase the applicable Optional Drilling Unit Interests,
the purchase price to be paid for the applicable Optional Drilling Unit Interests, and the other terms of the purchase shall be approved by the Conflicts Committee. If the Partnership Group Member and Ocean Rig are unable to agree on the purchase
price of the applicable Optional Drilling Unit Interests and/or the other material terms, the Partnership Group Member and 

  
 12 

 
Ocean Rig shall engage a mutually-agreed-upon independent investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform
the tasks for which such firm has been engaged or other expert advisor to determine the fair market value of the applicable Optional Drilling Unit Interests and/or any other material terms on which the Partnership Group Member and Ocean Rig are
unable to agree. In determining the fair market value of the applicable Optional Drilling Unit Interests and/or the other material terms on which the applicable Optional Drilling Unit Interests will be sold, the independent investment banking firm,
rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor, as applicable, will have access to the proposed sale and purchase
values and terms for the offer submitted by the Partnership Group Member and Ocean Rig, respectively, and to all information prepared by or on behalf of the Partnership Group Member and Ocean Rig with respect to the Optional Drilling Unit Interests
and reasonably requested by such independent investment banking firm, broker or other expert advisor. Such independent investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to
perform the tasks for which such firm has been engaged or other expert advisor will determine the fair market value of the applicable Optional Drilling Unit Interests and/or the other terms on which the Partnership Group Member and Ocean Rig are
unable to agree within 30 calendar days of its engagement and furnish the Partnership Group Member and Ocean Rig its determination in writing. The fees and expenses of the independent investment banking firm, rig broker, firm generally recognized in
the offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor, as applicable, will be divided equally between the Partnership Group Member and Ocean Rig. Upon receipt of
such determination in writing, the Partnership Group Member will have the option, but not the obligation to purchase the applicable Optional Drilling Unit Interests for the fair market value and on the other terms determined by the independent
investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor, as soon as commercially practicable after
determinations have been made. 
 (b) If a Partnership Group Member chooses to exercise its option to purchase the Optional Drilling Unit
Interests under Section 6.2(a), the applicable parties shall enter into a purchase and sale agreement for the purchase and sale of the applicable Optional Drilling Unit Interests pursuant to which Ocean Rig shall be obligated to sell the
applicable Optional Drilling Unit Interests to the Partnership Group Member and the Partnership Group Member shall be obligated to purchase such Optional Drilling Unit Interests from Ocean Rig. The terms of the purchase and sale agreement will
include the following: 
 (i) the Partnership Group Member will deliver a cash purchase price (unless the Partnership Group
Member and Ocean Rig agree that the consideration will be paid by means of equity of the Company, an interest-bearing promissory note or other form of consideration); 

(ii) the Partnership Group will be entitled to the benefit of the indemnification contained in Article VIII of this
Agreement for the remaining term of such indemnification with respect to events or conditions associated with the operation of the Ocean Rig Corcovado, Ocean Rig Olympia, Ocean Rig Poseidon, the Ocean Rig Mykonos, the Leiv
Eiriksson and the Eirik Raude and occurring before the date of acquisition of the applicable Optional Drilling Unit Interests by the Partnership Group Member; 

(iii) Ocean Rig will provide customary representations and warranties with respect to title to the applicable Optional Drilling
Unit Interests and any other such matters as the Partnership Group Member may approve, which approval will not be unreasonably withheld; 

(iv) Ocean Rig will grant to the Partnership Group Member the right, exercisable at the Partnership Group Member’s risk
and expense, to make such surveys, tests and inspections of the Ocean Rig Corcovado, Ocean Rig Olympia, Ocean Rig Poseidon, the Ocean Rig Mykonos, the Leiv Eiriksson and the Eirik Raude as the Partnership Group Member may
deem desirable, so long as such surveys, 

  
 13 

 
tests or inspections do not damage the Ocean Rig Corcovado, Ocean Rig Olympia, Ocean Rig Poseidon, the Ocean Rig Mykonos, the Leiv Eiriksson and the Eirik Raude or
interfere with the activities of the Ocean Rig Entities or charters of the Ocean Rig Corcovado, Ocean Rig Olympia, Ocean Rig Poseidon, the Ocean Rig Mykonos, the Leiv Eiriksson and the Eirik Raude thereon and so long as
the Partnership Group Member has furnished Ocean Rig with evidence that adequate liability insurance is in full force and effect; 

(v) the Partnership Group Member will have the right to terminate its obligation to purchase the Optional Drilling Unit
Interests under this Article VI and the related purchase and sale agreement if the results of any searches, surveys, tests or inspections conducted pursuant to paragraph (iv) above are, in the reasonable opinion of the Partnership
Group, unsatisfactory; and 
 (vi) neither Ocean Rig nor the applicable Partnership Group Member shall have any obligation to
sell or buy the Optional Drilling Unit Interests if any of the consents referred to in Section 6.1(b) above have not been obtained. 

(c) If a Partnership Group Member chooses or is deemed to have chosen not to exercise its option to purchase the Optional Drilling Unit
Interests at the price determined by the independent investment banking firm, broker or other expert advisor under Section 6.2(a), all future rights to purchase such Optional Drilling Unit Interests by the Partnership Group will be
extinguished. 
 ARTICLE VII 

Rights to Purchase Any Future Newbuildings and Secondhand Vessels of Ocean Rig 

Section 7.1 Rights to Purchase Any Future Newbuildings and Secondhand Vessels of Ocean Rig Including, but Not Limited to, the Ocean
Rig Apollo, Ocean Rig Santorini and Two other Vessels to be Named under hulls 2119 and 2120. 
 (a) Ocean Rig hereby grants to
the Partnership Group the unconditional right and option to purchase for a respective purchase price to be agreed upon by Ocean Rig and the Partnership Group, at any time within 36 months following the respective acquisition of the drilling unit by
Ocean Rig, Interests in the any newbuilding or secondhand vessel to be acquired by Ocean Rig, including but not limited to, the Ocean Rig Apollo, the Ocean Rig Santorini, and two additional vessels to be named under hulls 2119 and 2120
(the “Optional New Acquisition Interests”). 
 (b) The Parties acknowledge that the
potential transfer of the Optional New Acquisition Interests pursuant to this Article VIII is subject to: (i) obtaining any and all written consents of governmental authorities and other non-affiliated third parties; the terms and
conditions in the outstanding debt agreement of the Ocean Rig entities and (iii) the terms of all other agreements existing as of the date hereof in respect of the Optional New Acquisition Interests including, without limitation, any rights of
first refusal of the parties to such agreements to purchase the Optional New Acquisition Interests. Ocean Rig hereby covenants and agrees to use its reasonable efforts to obtain any such consents required to be obtained by it in connection with the
transfer of the Optional New Acquisition Interests pursuant to this Article VII. 
 Section 7.2 Procedures. 

(a) If a Partnership Group Member decides to exercise the option to purchase the Optional New Acquisition Interests, it will provide written
notice to Ocean Rig of such exercise, the purchase price it proposes 

  
 14 

 
to pay for the applicable Optional New Acquisition Interests, and the other material terms of the purchase. The decision to purchase the applicable Optional New Acquisition Interests, the
purchase price to be paid for the applicable Optional New Acquisition Interests, and the other terms of the purchase shall be approved by the Conflicts Committee. If the Partnership Group Member and Ocean Rig are unable to agree on the purchase
price of the applicable Optional New Acquisition Interests and/or the other material terms, the Partnership Group Member and Ocean Rig shall engage a mutually-agreed-upon independent investment banking firm, rig broker, firm generally recognized in
the offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor to determine the fair market value of the applicable Optional New Acquisition Interests and/or any other
material terms on which the Partnership Group Member and Ocean Rig are unable to agree. In determining the fair market value of the applicable Optional New Acquisition Interests and/or the other material terms on which the applicable Optional New
Acquisition Interests will be sold, the independent investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert
advisor, as applicable, will have access to the proposed sale and purchase values and terms for the offer submitted by the Partnership Group Member and Ocean Rig, respectively, and to all information prepared by or on behalf of the Partnership Group
Member and Ocean Rig with respect to the Optional New Acquisition Interests and reasonably requested by such independent investment banking firm, broker or other expert advisor. Such independent investment banking firm, rig broker, firm generally
recognized in the offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor will determine the fair market value of the applicable Optional New Acquisition Interests
and/or the other terms on which the Partnership Group Member and Ocean Rig are unable to agree within 30 calendar days of its engagement and furnish the Partnership Group Member and Ocean Rig its determination in writing. The fees and expenses of
the independent investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform the tasks for which such firm has been engaged or other expert advisor, as applicable, will be
divided equally between the Partnership Group Member and Ocean Rig. Upon receipt of such determination in writing, the Partnership Group Member will have the option, but not the obligation to purchase the applicable Optional New Acquisition
Interests for the fair market value and on the other terms determined by the independent investment banking firm, rig broker, firm generally recognized in the offshore drilling or shipping industries as qualified to perform the tasks for which such
firm has been engaged or other expert advisor, as soon as commercially practicable after determinations have been made. 
 (b) If a
Partnership Group Member chooses to exercise its option to purchase the Optional New Acquisition Interests under Section 7.2(a), the applicable parties shall enter into a purchase and sale agreement for the purchase and sale of the applicable
Optional New Acquisition Interests pursuant to which Ocean Rig shall be obligated to sell the applicable Optional New Acquisition Interests to the Partnership Group Member and the Partnership Group Member shall be obligated to purchase such Optional
New Acquisition Interests from Ocean Rig. The terms of the purchase and sale agreement will include the following: 
 (i) the
Partnership Group Member will deliver a cash purchase price (unless the Partnership Group Member and Ocean Rig agree that the consideration will be paid by means of equity of the Company, an interest-bearing promissory note or other form of
consideration); 
 (ii) the Partnership Group will be entitled to the benefit of the indemnification contained in Article
VIII of this Agreement for the remaining term of such indemnification with respect to events or conditions associated with the operation of any future newbuilding and secondhand vessels to be acquired by Ocean Rig, including but not limited to
Ocean Rig Apollo, Ocean Rig Santorini, and two other vessels to be named presently under hulls 2119 and 2120 , and occurring before the date of acquisition of the applicable Optional New Acquisition Interests by the Partnership Group Member;

  
 15 

 (iii) Ocean Rig will provide customary representations and warranties with
respect to title to the applicable Optional New Acquisition Interests and any other such matters as the Partnership Group Member may approve, which approval will not be unreasonably withheld; 

(iv) Ocean Rig will grant to the Partnership Group Member the right, exercisable at the Partnership Group Member’s risk
and expense, to make such surveys, tests and inspections of the vessels as the Partnership Group Member may deem desirable, so long as such surveys, tests or inspections do not damage the vessels or interfere with the activities of the Ocean Rig
Entities or construction or charters of the vessels thereon and so long as the Partnership Group Member has furnished Ocean Rig with evidence that adequate liability insurance is in full force and effect; 

(v) the Partnership Group Member will have the right to terminate its obligation to purchase the Optional New Acquisition
Interests under this Article VII and the related purchase and sale agreement if the results of any searches, surveys, tests or inspections conducted pursuant to paragraph (iv) above are, in the reasonable opinion of the
Partnership Group, unsatisfactory; and 
 (vi) neither Ocean Rig nor the applicable Partnership Group Member shall have any
obligation to sell or buy the Optional New Acquisition Interests if any of the consents referred to in Section 7.1(b) above have not been obtained. 

(c) If a Partnership Group Member chooses or is deemed to have chosen not to exercise its option to purchase the Optional New Acquisition
Interests at the price determined by the independent investment banking firm, broker or other expert advisor under Section 7.2(a), all future rights to purchase such Optional New Acquisition Interests by the Partnership Group will be
extinguished. 
 ARTICLE VIII 

INDEMNIFICATION 

Section 8.1 Ocean Rig Indemnification. 

Subject to the provisions of Section 8.2 and Section 8.3, Ocean Rig shall indemnify, defend and hold harmless the Partnership Group
from and against (a) any Covered Environmental Losses relating to the assets contributed by the Ocean Rig Entities to the Partnership Group prior to or on the Closing Date (the “Contribution
Assets”) to the extent that Ocean Rig is notified by the Partnership of any such Covered Environmental Losses within 5 years after the Closing Date and (b) Losses to the Partnership Group arising from
(i) the failure of the Partnership Group, immediately after the Closing Date, to be the owner of such valid leasehold interests or fee ownership interests in and to the Contribution Assets as are necessary to enable the Partnership Entities to
own and operate the Contribution Assets in substantially the same manner that the Contribution Assets were owned and operated by the Ocean Rig Entities immediately prior to the respective dates on which each such Contribution Asset was acquired by
the Partnership Entities or (ii) the failure of the Partnership Entities to have by the Closing Date any consent or governmental permit necessary to allow the Partnership Entities to own or operate the Contribution Assets in substantially the
same manner that the Contribution Assets were owned and operated by the Ocean Rig Entities immediately prior to the respective dates on which each such Contribution Asset was acquired by the Partnership Entities, in each of clauses (b)(i) and
(b)(ii) above, to the extent that Ocean Rig is notified by the Partnership of such Losses within three (3) years after the Closing Date; and (c) all federal, state, foreign and local income tax liabilities attributable to the operation of
the Contribution Assets prior to the Closing Date, including any such income tax liabilities of the Ocean Rig Entities that may result from the consummation of the formation transactions for the Partnership Group and the Partnership, but excluding
any federal, state, foreign and local income taxes reserved on the books of the Partnership Group on the Closing Date. 

  
 16 

 Section 8.2 Limitation Regarding Indemnification. 

The aggregate liability of Ocean Rig under Section 8.1(a) above shall not exceed $10,000,000. Furthermore, no claim may be made against
Ocean Rig for indemnification pursuant to Section 7.1(a), unless the aggregate dollar amount of all claims for indemnification pursuant to such section shall exceed $500,000, in which case Ocean Rig shall be liable for claims for
indemnification only to the extent such aggregate amount exceeds $500,000. 
 Section 8.3 Indemnification Procedures. 

(a) The Partnership Group Members agree that within one month after they become aware of facts giving rise to a claim for indemnification
pursuant to Section 8.1, they will provide notice thereof in writing to Ocean Rig specifying the nature of and specific basis for such claim. 

(b) Ocean Rig shall have the right to control all aspects of the defense of (and any counterclaims with respect to) any claims brought against
the Partnership Group that are covered by the indemnification set forth in Section 7.1, including, without limitation, the selection of counsel, determination of whether to appeal any decision of any court and the settling of any such
matter or any issues relating thereto; provided, however, that no such settlement shall be entered into without the consent (which consent shall not be unreasonably withheld) of the Partnership Group unless it includes a full release
of the Partnership Group from such matter or issues, as the case may be. 
 (c) The Partnership Group Members agree to cooperate fully with
Ocean Rig with respect to all aspects of the defense of any claims covered by the indemnification set forth in Section 8.1, including, without limitation, the prompt furnishing to Ocean Rig of any correspondence or other notice relating
thereto that the Partnership Group may receive, permitting the names of the members of the Partnership Group to be utilized in connection with such defense, the making available to Ocean Rig of any files, records or other information of the
Partnership Group that Ocean Rig considers relevant to such defense and the making available to Ocean Rig of any employees of the Partnership Group; provided, however, that in connection therewith Ocean Rig agrees to use reasonable
efforts to minimize the impact thereof on the operations of the Partnership Group and further agrees to maintain the confidentiality of all files, records and other information furnished by a Partnership Group Member pursuant to this
Section 8.3. In no event shall the obligation of the Partnership Group to cooperate with Ocean Rig as set forth in the immediately preceding sentence be construed as imposing upon the Partnership Group an obligation to hire and pay for
counsel in connection with the defense of any claims covered by the indemnification set forth in this Article VIII; provided, however, that the Partnership Group Members may, at their own option, cost and expense, hire and pay
for counsel in connection with any such defense. Ocean Rig agrees to keep any such counsel hired by the Partnership Group reasonably informed as to the status of any such defense (including providing such counsel with such information related to any
such defense as such counsel may reasonably request) but Ocean Rig shall have the right to retain sole control over such defense. 
 In
determining the amount of any Loss for which any of the members of the Partnership Group is entitled to indemnification under this Agreement, the gross amount of the indemnification will be reduced by (a) any insurance proceeds realized by the
Partnership Group, and such correlative insurance benefit shall be net of any incremental insurance premium that becomes due and payable by the Partnership Group as a result of such claim, and (b) all amounts recovered by the Partnership Group
under contractual indemnities from third Persons. The Partnership Group hereby agrees to use commercially reasonable efforts to realize any applicable insurance proceeds or amounts recoverable under such contractual indemnities; provided,
however, that the costs and expenses (including, without limitation, court costs and reasonable attorneys’ fees) of the Partnership Group in connection with such efforts shall reimbursed by Ocean Rig within a year of the determination of
a Loss for which such indemnification claim is made. 

  
 17 

 ARTICLE IX 

MISCELLANEOUS 

Section 9.1 Choice of Law; Submission To Jurisdiction. 

This Agreement shall be subject to and governed by the laws of the State of New York. Each party hereby submits to the jurisdiction of the
state and federal courts located in the State of New York and to venue in New York, New York. 
 Section 9.2 Notice. 

All notices, requests or consents provided for or permitted to be given pursuant to this Agreement must be in writing and must be given by
depositing the same in the mail, addressed to the Person to be notified, postpaid, and registered or certified with return receipt requested or by delivering such notice in person or by private-courier, prepaid, or by telecopier to such party.
Notice given by personal delivery or mail shall be effective upon actual receipt. Couriered notices shall be deemed delivered on the date the courier represents that delivery will occur. Notice given by telecopier shall be effective upon actual
receipt if received during the recipient’s normal business hours, or at the beginning of the recipient’s next business day after receipt if not received during the recipient’s normal business hours. All notices to be sent to a party
pursuant to this Agreement shall be sent to or made at the address set forth below such party’s signature to this Agreement, or at such other address as such party may stipulate to the other parties in the manner provided in this
Section 9.2. 
 Ocean Rig UDW Inc. 

Address for Notice: 
 Tribune
House 
 10 Skopa Street, Nicosia, Cyprus 

Tel.: (+357) 22767515 
 Fax:
(+357) 22767542 
 Attention: Mr. Savvas Georghiades 

Ocean Rig Partners LP 
 Address
for Notice: 
 Tribune House 

10 Skopa Street, Nicosia, Cyprus 

Tel.: (+357) 22767515 
 Fax:
(+357) 22767542 
 Attention: 

Ocean Rig General Partners GP LLC 

Address for Notice: 
 Tribune
House 
 10 Skopa Street, Nicosia, Cyprus 

Tel.: (+357) 22767515 
 Fax:
(+357) 22767542 
 Ocean Rig Operating Partners GP LLC 

Address for Notice: 
 Tribune
House 

  
 18 

 10 Skopa Street, Nicosia, Cyprus 

Tel.: (+357) 22767515 
 Fax:
(+357) 22767542 
 Ocean Rig Operating LP 

Address for Notice: 
 Tribune
House 
 10 Skopa Street, Nicosia, Cyprus 

Tel.: (+357) 22767515 
 Fax:
(+357) 22767542 
 Section 9.3 Entire Agreement. 

This Agreement constitutes the entire agreement of the parties relating to the matters contained herein, superseding all prior contracts or
agreements, whether oral or written, relating to the matters contained herein. 
 Section 9.4 Termination. 

Upon a Change of Control of the Ocean Rig General Partner or of the Partnership, the provisions of Articles II, III and IV, of this Agreement
(but not less than all of such Articles) shall terminate immediately. Upon a Change of Control of Ocean Rig, the provisions of Articles II, III and IV of this Agreement applicable to Ocean Rig (but not less than all of such Articles) shall terminate
at the time that is the later of (a) the date on which all of the Company’s outstanding subordinated units have converted to common units of the Partnership and (b) the date of the Change of Control of Ocean Rig. 

Section 9.5 Waiver; Effect of Waiver or Consent. 

Any party hereto may (a) extend the time for the performance of any obligation or other act of any other party hereto or (b) waive
compliance with any agreement or condition contained herein. Except as otherwise specifically provided herein, any such extension or waiver shall be valid only if set forth in a written instrument duly executed by the party or parties to be bound
thereby; provided, however, that the Partnership may not, without the prior approval of the Conflicts Committee, agree to any extension or waiver of this Agreement that, in the reasonable discretion of the Board, will adversely affect
the holders of common units of the Company. No waiver or consent, express or implied, by any party of or to any breach or default by any Person in the performance by such Person of its obligations hereunder shall be deemed or construed to be a
waiver or consent of or to any other breach or default in the performance by such Person of the same or any other obligations of such Person hereunder. Failure on the part of a party to complain of any act of any Person or to declare any Person in
default, irrespective of how long such failure continues, shall not constitute a waiver by such party of its rights hereunder until the applicable statute of limitations period has run. 

Section 9.6 Amendment or Modification. 

This Agreement may be amended or modified from time to time only by the written agreement of all the parties hereto; provided, however, that
the Partnership may not, without the prior approval of the Conflicts Committee, agree to any amendment or modification of this Agreement that, in the reasonable discretion of the Board, will adversely affect the holders of common units of the
Partnership. 
 Section 9.7 Assignment. 

No party shall have the right to assign its rights or obligations under this Agreement without the consent of the other parties hereto. 

  
 19 

 Section 9.8 Counterparts. 

This Agreement may be executed in any number of counterparts with the same effect as if all signatory parties had signed the same document. All
counterparts shall be construed together and shall constitute one and the same instrument. 
 Section 9.9 Severability. 

If any provision of this Agreement or the application thereof to any Person or circumstance shall be held invalid or unenforceable to any
extent, the remainder of this Agreement and the application of such provision to other Persons or circumstances shall not be affected thereby and shall be enforced to the greatest extent permitted by law. 

Section 9.10 Gender, Parts, Articles and Sections. 

Whenever the context requires, the gender of all words used in this Agreement shall include the masculine, feminine and neuter, and the number
of all words shall include the singular and plural. All references to Article numbers and Section numbers refer to Articles and Sections of this Agreement. 

Section 9.11 Further Assurances. 

In connection with this Agreement and all transactions contemplated by this Agreement, each signatory party hereto agrees to execute and
deliver such additional documents and instruments and to perform such additional acts as may be necessary or appropriate to effectuate, carry out and perform all of the terms, provisions and conditions of this Agreement and all such transactions.

 Section 9.12 Withholding or Granting of Consent. 

Each party may, with respect to any consent or approval that it is entitled to grant pursuant to this Agreement, grant or withhold such consent
or approval in its sole and uncontrolled discretion, with or without cause, and subject to such conditions as it shall deem appropriate. 

Section 9.13 Laws and Regulations. 

Notwithstanding any provision of this Agreement to the contrary, no party to this Agreement shall be required to take any act, or fail to take
any act, under this Agreement if the effect thereof would be to cause such party to be in violation of any applicable law, statute, rule or regulation. 

Section 9.14 Negotiation of Rights of Ocean Rig, Partners, Assignees and Third Parties. 

The provisions of this Agreement are enforceable solely by the parties to this Agreement, and no shareholder of Ocean Rig and no partner,
assignee or other Person of the Partnership shall have the right, separate and apart from Ocean Rig or the Partnership, as applicable, to enforce any provision of this Agreement or to compel any party to this Agreement to comply with the terms of
this Agreement. 
 [SIGNATURE PAGES FOLLOW] 

  
 20 

 IN WITNESS WHEREOF, the Parties have executed this Agreement on, and effective as of, the Closing
Date. 
  

			
	OCEAN RIG UDW INC.
		
	By:	 	  

		 	Name:
		 	Title:
	
	OCEAN RIG PARTNERS LP
		
	By:	 	Ocean Rig Partners GP LLC, its general partner
		
	By:	 	  

		 	Name:
		 	Title:
	
	OCEAN RIG PARTNERS GP LLC
		
	By:	 	  

		 	Name:
		 	Title:
	
	OCEAN RIG OPERATING PARTNERS GP LLC
		
	By:	 	  

		 	Name:
		 	Title:
	
	OCEAN RIG OPERATING LP
	
	By: Ocean Rig Operating Partners GP LLC, its general partner
		
	By:	 	  

		 	Name:
		 	Title:

 [Signature Page to Omnibus Agreement] 

  
 21 

 
			
	OCEAN RIG MLP HOLDINGS INC.
		
	By:	 	  

		 	Name:
		 	Title:

 [Signature Page to Omnibus Agreement] 

  
 22EX-10.5

 Exhibit 10.5 

FORM OF CONTRIBUTION, ASSUMPTION AND PURCHASE AGREEMENT 

THIS CONTRIBUTION, ASSUMPTION AND PURCHASE AGREEMENT made as of this [—], 2014, by and
among Ocean Rig UDW Inc., a Marshall Islands corporation (“Ocean Rig”), Ocean Rig Partners GP LLC, a Marshall Islands limited liability company (the “MLP GP”), Ocean Rig Partners LP, a Marshall Islands limited partnership (the
“MLP”), Ocean Rig Holdings Inc., a Marshall Islands corporation (“OPCO Holdings”), Ocean Rig MLP Holdings Inc., a Marshall Islands corporation (“MLP Holdings”), Ocean Rig Operating Partners GP LLC, a Marshall Islands
limited liability company ( “OPCO GP”), Ocean Rig Operating LP, a Marshall Islands limited partnership (“OPCO”), DrillShips Ocean Ventures Inc., a Marshall Islands corporation (“DOV I”), Drillship Skiathos Shareholders
Inc., a Marshall Islands corporation (“Skiathos Shareholders”), Drillship Skiathos Owners Inc., a Marshall Islands corporation (“Skiathos Owners”), Drillship Skyros Shareholders Inc., a Marshall Islands corporation (“Skyros
Shareholders”), Drillship Skyros Owners Inc., a Marshall Islands corporation (“Skyros Owners”), Drillship Kythnos Shareholders Inc., a Marshall Islands corporation (“Kythnos Shareholders” and together with Skiathos
Shareholders and Skyros Shareholders, the “DOV I Fleet Shareholders”), Drillship Kythnos Owners Inc., a Marshall Islands corporation (“Kythnos Owners” and together with Skiathos Owners and Skyros Owners, the “DOV I Fleet
Owners”), Drillships Ocean Ventures II Inc., a Marshall Islands corporation (“DOV II”), Drillship Skiathos Shareholders II Inc., a Marshall Islands corporation (“Skiathos II Shareholders”), Drillship Skiathos Owners II Inc.,
a Marshall Islands corporation (“Skiathos II Owners”), Drillship Skyros Shareholders II Inc., a Marshall Islands corporation (“Skyros II Shareholders”), Drillship Skyros Owners II Inc., a Marshall Islands corporation
(“Skyros II Owners”), Drillship Kythnos Shareholders II Inc., a Marshall Islands corporation (“Kythnos II Shareholders” and together with Skiathos II Shareholders and Skyros II Shareholders, the “DOV II Fleet
Shareholders”), Drillship Kythnos Owners II Inc., a Marshall Islands corporation (“Kythnos II Owners” and together with Skiathos II Owners and Skyros II Owners, the “DOV II Fleet Owners”), Drillships Ocean Ventures
Operations Inc., a Marshall Islands corporation (“DOV Operations”) and Ocean Rig Block 33 Brasil Cooperatief UA, a Dutch company (“Cooperatief”)(each, a “Party” and collectively, the “Parties”). 

RECITALS 
 WHEREAS,
Ocean Rig and the MLP GP have formed the MLP pursuant to the Marshall Islands Limited Partnership Act (the “MILPA”) for the purpose of owning and operating drilling rigs and any other lawful act or activity for which limited partnerships
may be formed under the MILPA. 
 WHEREAS, pursuant to this Contribution, Assumption and Purchase Agreement, the following actions
have been taken as of or prior to the date of this Contribution, Assumption and Purchase Agreement: 
  

	 	1.	Ocean Rig formed the MLP GP pursuant to the Marshall Islands Limited Liability Company Act (the “Marshall Islands LLC Act”) and contributed $5,000 in exchange for all of the membership interests in the MLP GP;

  

	 	2.	Ocean Rig and the MLP GP formed the MLP pursuant to the MILPA, Ocean Rig contributed $1,000,000 in exchange for the initial limited partner interests in the MLP (the “Initial LP Interests”) and the MLP GP
received a non-economic general partner interest in the MLP (the “General Partner Interests”); 

  
 1 

	 	3.	Ocean Rig formed MLP Holdings pursuant to the Marshall Islands Business Corporations Act and contributed all of the membership interests in the MLP GP and the Initial LP Interests in exchange for all of its outstanding
share capital; 

  

	 	4.	Ocean Rig formed OPCO Holdings pursuant to the Marshall Islands Business Corporations Act, and subscribed for all of its issued and outstanding share capital; 

 

	 	5.	The MLP formed OPCO GP pursuant to the Marshall Islands LLC Act and the MLP contributed $1,000 in exchange for all of the membership interests in the OPCO GP; 

 

	 	6.	The MLP and OPCO GP formed OPCO under the terms of the MILPA, the MLP contributed $1,000 in exchange for all of the limited partner interests in the OPCO and OPCO GP received a non-economic general partner interest in
OPCO; 

  

	 	7.	OPCO formed DOV II, pursuant to the Marshall Islands Business Corporations Act, and OPCO subscribed for all of its issued and outstanding share capital; 

 

	 	8.	DOV II formed each of the DOV II Fleet Shareholders, pursuant to the Marshall Islands Business Corporations Act, being Skiathos II Shareholders, Skyros II Shareholders and Kythnos II Shareholders, and subscribed for all
of their issued and outstanding share capital; 

  

	 	9.	Skiathos II Shareholders formed Skiathos II Owners pursuant to the Marshall Islands Business Corporations Act and subscribed for all of its issued and outstanding share capital, Skyros II Shareholders formed Skyros II
Owners pursuant to the Marshall Islands Business Corporations Act and subscribed for all of its issued and outstanding share capital, and Kythnos II Shareholders formed Kythnos II Owners pursuant to the Marshall Islands Business Corporations Act and
subscribed for all of its issued and outstanding share capital; 

  

	 	10.	The board of directors of Ocean Rig designated each of the MLP GP, the MLP, MLP Holdings, OPCO Holdings, OPCO GP, OPCO, DOV II, the DOV II Fleet Shareholders, the DOV II Fleet Owners, DOV Operations and each of DOV
Operation’s subsidiaries as Unrestricted Subsidiaries as such term is defined under and pursuant to the terms and subject to the conditions of (as applicable) (i) the indentures relating to the $800 million aggregate principal amount 6.50%
Senior Secured Notes due 2017, the $500 million aggregate principal amount 7.25% Senior Notes due 2019, and (ii) the Credit Agreement dated July 12, 2013, as amended and restated February 7, 2014, by and among Drillships Financing
Holding Inc. and the other parties thereto (and together with the DOV I Facility (defined below), collectively, the “Debt Agreements”). 

  

	 	11.	The agreements of limited partnership and the limited liability company agreements as well as the articles of incorporation and bylaws of the aforementioned entities will be amended and restated to the extent necessary
to reflect the applicable matters set forth above. 

  
 2 

 WHEREAS, pursuant to this Contribution, Assumption and Purchase Agreement, the Fleet
Purchase Agreement dated as of [—], 2014, by and among, Ocean Rig UDW Inc., DOV I, DOV II, OPCO and the MLP (the “Fleet Purchase Agreement”), and certain ancillary agreements described in
the Fleet Purchase Agreement, each of the following transactions (the “Transactions”) shall occur simultaneously with the closing of the IPO (the “Effective Time”) in the following order: 

 

	 	1.	Ocean Rig’s guarantee under the $1.3 billion Credit Agreement, dated July 25, 2014, among, inter alia, DOV I, as Borrower, and Deutsche Bank AG New York Branch, as Administrative Agent and Pari Passu
Collateral Agent (the “DOV I Facility”) shall be released in accordance with the terms of the DOV I Facility. 

  

	 	2.	DOV II will assume $[—] billion of principal indebtedness under the DOV I Facility (the “Assumed Debt”) and any accrued interest under the DOV I Facility
through the Effective Time will be paid by DOV I. 

  

	 	3.	Each of DOV I Fleet Owners shall cause the release of the Vessels Ocean Rig Mylos, Ocean Rig Skyros, and Ocean Rig Athena (each, a “Vessel” and, collectively, the “Initial
Fleet”) from the liens of the Ship Mortgages as defined in the DOV I Facility. 

  

	 	4.	DOV I shall cause the release of the equity interests of Drillships Operations and Cooperatief from the liens of the Security Agreement and other Collateral Documents as such terms are defined in the DOV Facility.

  

	 	5.	Skiathos Owners, Skyros Owners and Kythnos Owners shall sell to Skiathos II Owners, Skyros II Owners and Kythnos II Owners the Vessels Ocean Rig Mylos, Ocean Rig Skyros, and Ocean Rig Athena,
respectively, in each case free and clear of taxes, debts and liens. 

  

	 	6.	DOV I shall convey to DOV II 100% of the equity interests of DOV Operations and 1% of the equity interests of Cooperatief (such interests, the “Operation SPV Interests” and the contribution of the Operations
SPV Interests and the purchase and sale of the Initial Fleet, the “Fleet Sale”) free and clear of all liens (other than restrictions on transfer under applicable securities laws). 

 

	 	7.	DOV II shall pledge Operation SPV Interests to Deutsche Bank AG New York Branch, as the Pari Passu Collateral Agent with respect to the Assumed Debt under the DOV I Facility (the “Pari Passu Collateral Agent”)
and the DOV II Fleet Owners shall grant mortgages over the Vessels to the Pari Passu Collateral Agent as security trustee; 

  

	 	8.	The MLP shall transfer and convey to OPCO Holdings [—] % of the limited partner interests in OPCO (the “OPCO Interests”). 

 

	 	9.	In connection solely with the IPO and in consideration thereof, the MLP will redeem the Initial LP Interests held by MLP Holdings and will refund the initial contribution in the amount of $1,000,000 made in connection
with MLP’s formation, (ii) will issue to MLP Holdings [—] common units and [—] subordinated units of the MLP (such units shall have
such rights and privileges as set forth in the MLP’s registration statement on Form F-1), and (iii) issue to the MLP GP all of the incentive distribution rights. 

 

	 	10.	The MLP shall issue [—] common units to the public in an underwritten public offering (the “IPO”) in exchange for
$[—] million (the “IPO Proceeds”). 

  
 3 

	 	11.	The MLP shall use a portion of the IPO Proceeds to fund (a) underwriting discounts and commissions of $[—] million, (b) other transaction expenses incurred
in connection with the IPO of approximately $[—] million, and (c) the Cash Payment (defined below). 

  

	 	12.	The MLP, on behalf of DOV II, shall pay to DOV I the balance of the consideration for the Fleet Sale of $[—] million from the IPO Proceeds (the “Cash
Payment” and together with the other consideration to be paid pursuant to Fleet Purchase Agreement , the “Consideration,”) 

WHEREAS, Ocean Rig and the MLP have determined it is in their best interests to cause each of Drillship Skyros Owners II Inc. and Ocean
Rig Global Chartering Inc. to enter into the Bareboat Charterparty Agreement regarding Ocean Rig Skyros in the form previously presented to the MLP (the “Bareboat Agreement”) in connection with the IPO. 

WHEREAS, Ocean Rig and the MLP have determined it is in their best interests to cause each of Ocean Rig Management Inc. and the MLP to
enter into the Management and Administrative Services Agreement in the form previously presented to the MLP (the “Management and Administrative Services Agreement”) in connection with the IPO. 

WHEREAS, each of the Parties have been, prior to the date of this Contribution, Assumption and Purchase Agreement, authorized to effect
the actions set forth below at the times and in the order set forth below. 
 NOW, THEREFORE, in consideration of the
foregoing and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, and intending to be legally bound hereby, the Parties undertake and agree as follows: 

ARTICLE I 
 THE
CONTRIBUTIONS, ASSUMPTIONS AND PURCHASES 
 1.1 The Parties acknowledge and agree that the Transactions shall occur simultaneously,
pursuant to this Contribution, Assumption and Purchase Agreement and the Fleet Purchase Agreement in the order listed above effective as of the Effective Time. 

ARTICLE II 
 THE IPO AND
CONCURRENT TRANSACTIONS 
 2.1 The IPO. The MLP shall issue [—] common units
to the public in the IPO pursuant to an underwriting agreement by and among the MLP and the underwriters of the IPO. 
 2.2 Use of the
IPO Proceeds. The MLP shall use a portion of the IPO Proceeds to fund (a) underwriting discounts and commissions of approximately $[—] million, (b) other transaction expenses incurred
in connection with the IPO of approximately $[—] million and (c) the Cash Payment. 

2.3 Bareboat Charter. The MLP and Ocean Rig shall cause each of Drillship Skyros Owners II Inc. and Ocean Rig Global Chartering Inc.,
respectively, to enter into the Bareboat Agreement immediately prior to the Effective Time. 
 2.4 Management and Administrative
Services Agreement. The MLP shall and Ocean Rig shall cause Ocean Rig Management Inc. to enter into the Management and Administrative Services Agreement immediately prior to the Effective Time. 

ARTICLE III 

REPRESENTATIONS AND WARRANTIES; DISCLAIMER 

3.1 General Representations and Warranties. Each of the Parties hereby represents and warrants that: 

(a) The execution and delivery of this Contribution, Assumption and Purchase Agreement and all documents, instruments and agreements required
to be executed and delivered by it pursuant to this Contribution, Assumption and Purchase Agreement in connection with the completion of the transactions contemplated by this Contribution, Assumption and Purchase Agreement, have been duly authorized
by all necessary actions by such Party, and this Contribution, Assumption and Purchase Agreement has been duly executed and delivered by such Party and constitutes a legal, valid and binding obligation of such Party enforceable in accordance with
its terms, except as may be limited by bankruptcy, insolvency, liquidation, reorganization, reconstruction and other similar laws of general application affecting the enforceability of remedies and rights of creditors and except that equitable
remedies such as specific performance and injunction are in the discretion of a court; 

  
 4 

 (b) The execution, delivery and performance by it of this Contribution, Assumption and Purchase
Agreement will not conflict with or result in any violation of or constitute a breach of any of the terms or provisions of, or result in the acceleration of any obligation under, or constitute a default under any provision of: (i) any of such
Party’s partnership agreement, limited liability company agreement, articles of association, articles of incorporation, by-laws or other organizational documents as the case may be; (ii) any lien, encumbrance, security interest, pledge,
mortgage, charge, other claim, bond, indenture, agreement, contract, franchise license, permit or other instrument or obligation to which such Party is a party or is subject or by which any of such Party’s assets or properties may be bound; or
(iii) any laws, statutes, ordinances, rules or regulations promulgated by a governmental authority, orders of a governmental authority, judicial decisions, decisions of arbitrators or determinations of any governmental authority or court
(“Laws”) applicable to such Party; and 
 (c) Except as have already been obtained or that will be obtained in the ordinary course
of business, no consent, permit, approval or authorization of, notice or declaration to or filing with any governmental authority or any other person, including those related to any environmental laws or regulations or the Drilling Contracts
described below or services agreements or management agreements related to the rigs in the Initial Fleet, is required in connection with the execution and delivery by such Party of this Contribution, Assumption and Purchase Agreement or the
consummation by such Party of the Transactions contemplated hereunder. 
 3.2 Representations and Warranties of Ocean Rig, DOV I, the
DOV I Fleet Shareholders and the DOV I Fleet Owners. Ocean Rig, DOV I, the DOV I Fleet Shareholders and the DOV I Fleet Owners hereby represent and warrant that: 

(a) The Skiathos Owners, Skyros Owners and Kythnos Owners own the Vessels, the Ocean Rig Mylos, Ocean Rig Skyros, and Ocean Rig
Athena, respectively, Initial Fleet and have good legal title to the same, free and clear of all liens, encumbrances, security interests, pledges, mortgages, charges or other claims (other than pursuant to the Ship Mortgages defined in the DOV I
Facility); 
 (b) There is no outstanding agreement, contract, option, commitment or other right or understanding in favor of, or held by,
any person other than the MLP, OPCO and DOV II pursuant to the Fleet Purchase Agreement and the DOV II Fleet Owners pursuant to the related memorandum of agreement (“MOA”) to acquire, directly or indirectly, the Initial Fleet, that has not
been terminated or otherwise waived; 
 (c) Except as enforceability may be limited by bankruptcy, insolvency, fraudulent transfer,
moratorium or similar laws, laws of general applicability relating to or affecting creditors’ rights, and to general equity principles, the Charter Contract No. RSB-DRI-01C-12, dated August 17, 2012, between Repsol Sinopec Brasil S.A. and
Ocean Rig Block 33 Brasil B.V. (the “Ocean Rig Mylos Drilling Contract”) is a valid and binding agreement of Ocean Rig Block 33 Brasil B.V. enforceable against Ocean Rig Block 33 Brasil B.V. in accordance with its terms and, to the
knowledge of Ocean Rig, is a valid and binding agreement of Repsol Sinopec Brasil S.A. enforceable against Repsol Sinopec Brasil S.A. in accordance with its terms, and the consummation of the Transactions will not cause the Ocean Rig Mylos Drilling
Contract to become unenforceable. 

  
 5 

 (d) Except as enforceability may be limited by bankruptcy, insolvency, fraudulent transfer,
moratorium or similar laws, laws of general applicability relating to or affecting creditors’ rights, and to general equity principles, the Contract No FCP-0455, dated July 10, 2013, among Total E&P Angola, Ocean Rig Cubango Operations
Inc. and Olympia Rig Angola LDA (the “Ocean Rig Skyros Drilling Contract”) is a valid and binding agreement of Ocean Rig Cubango Operations Inc. enforceable against Ocean Rig Cubango Operations Inc. in accordance with its terms and,
to the knowledge of Ocean Rig, is a valid and binding agreement of all other parties thereto enforceable against each of them in accordance with its terms, and the consummation of the Transactions will not cause the Ocean Rig Skyros Drilling
Contract to become unenforceable. 
 (e) Except as enforceability may be limited by bankruptcy, insolvency, fraudulent transfer, moratorium
or similar laws, laws of general applicability relating to or affecting creditors’ rights, and to general equity principles, the Drilling Service Agreement, dated November 15, 2012, among ConocoPhillips Angola 36 Ltd, ConocoPhillips Angola
37 Ltd, Ocean Rig Cunene Operations Inc. and Olympia Rig Angola LDA (the “Ocean Rig Athena Drilling Contract” and together with the Ocean Rig Mylos Drilling Contract and the Ocean Rig Skyros Drilling Contract, the
“Drilling Contracts”) is a valid and binding agreement of Ocean Rig Cunene Operations Inc. enforceable against Ocean Rig Cunene Operations Inc. in accordance with its terms and, to the knowledge of Ocean Rig, is a valid and binding
agreement of all other parties thereto enforceable against each of them in accordance with its terms, and the consummation of the Transactions will not cause the Ocean Rig Athena Drilling Contract to become unenforceable. 

(f) Copies of each of the Drilling Contracts, service agreements and management agreements and all other material contracts related to the
Initial Fleet have been made available to the MLP, other than the services agreement related Ocean Rig Mylos; 
 (g) Ocean Rig and
its affiliated parties have fulfilled all material obligations required pursuant to the Drilling Contracts, service agreements, management agreements and the other material contracts described in the MLP’s registration statement to have been
performed by them prior to the date of this Contribution, Assumption and Purchase Agreement and have not waived any material rights thereunder; and no material default or breach exists in respect thereof on their part or, to their knowledge, any of
the other parties thereto and, to their knowledge, no event has occurred which, after giving of notice or the lapse of time, or both, would constitute such a material default or breach; 

(h) Except for such liabilities, debts obligations, encumbrances, defects, restrictions or claims of a general nature and magnitude that would
arise in connection with the operation of drillships of the same type as the Initial Fleet in the ordinary course of business, there are no liabilities, debts or obligations of, encumbrances, defects or restrictions with respect to, or claims
against the Initial Fleet, other than those arising under the Assumed Debt; 
 (i) Each vessel is (i) adequate and suitable, in all
material respects, for use by the MLP and its subsidiaries in their business as described in the MLP’s registration statement, ordinary wear and tear excepted; (ii) seaworthy, in all material respects, for hull and machinery insurance
warranty purposes and is in good running order and repair; (iii) insured against all material risks, and in amounts consistent with common industry practices; (iv) in compliance with maritime laws and regulations; (v) duly registered
under the flag of the Marshall Islands; and (vi) in compliance, in all material respects, with the requirements of its present class and classification society; and all class certificates of each of the Vessels in the Initial Fleet are clean
and valid and free of recommendations affecting class; and 
 (j) All representations and warranties contained in the Fleet Purchase
Agreement and separate MOA are true and correct in all material respects as of the date hereof and the Effective Time, as applicable. 

  
 6 

 3.3 Disclaimer of Warranties. EXCEPT TO THE EXTENT EXPRESSLY PROVIDED IN THIS
CONTRIBUTION, ASSUMPTION AND PURCHASE AGREEMENT OR IN ANY OTHER DOCUMENT EXECUTED OR DELIVERED IN CONNECTION WITH THIS CONTRIBUTION, ASSUMPTION AND PURCHASE AGREEMENT, INCLUDING THE FLEET PURCHASE AGREEMENT AND RELATED MOA, THE PARTIES ACKNOWLEDGE
AND AGREE THAT NONE OF THE PARTIES HAS MADE, DOES NOT MAKE, AND EACH SUCH PARTY SPECIFICALLY NEGATES AND DISCLAIMS, ANY REPRESENTATIONS, WARRANTIES, PROMISES, COVENANTS, AGREEMENTS OR GUARANTIES OF ANY KIND OR CHARACTER WHATSOEVER, WHETHER EXPRESS,
IMPLIED OR STATUTORY, ORAL OR WRITTEN, PAST OR PRESENT, REGARDING (A) THE VALUE, NATURE, QUALITY OR CONDITION OF THE VESSELS IN THE INITIAL FLEET, INCLUDING THE ENVIRONMENTAL CONDITION OF SUCH VESSELS GENERALLY, INCLUDING THE PRESENCE OR LACK
OF HAZARDOUS SUBSTANCES OR OTHER MATTERS ON SUCH VESSELS, (B) THE INCOME TO BE DERIVED FROM SUCH VESSELS, (C) THE SUITABILITY OF SUCH VESSELS FOR ANY AND ALL ACTIVITIES AND USES THAT MAY BE CONDUCTED THEREON OR THEREWITH, (D) THE
COMPLIANCE OF OR BY SUCH VESSELS OR THEIR OPERATION WITH ANY LAWS (INCLUDING ANY ZONING, ENVIRONMENTAL PROTECTION, POLLUTION OR LAND USE LAWS, RULES, REGULATIONS, ORDERS OR REQUIREMENTS), OR (E) THE HABITABILITY, MERCHANTABILITY, MARKETABILITY,
PROFITABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF SUCH VESSELS. EXCEPT TO THE EXTENT PROVIDED IN ANY OTHER DOCUMENT EXECUTED OR DELIVERED IN CONNECTION WITH THIS CONTRIBUTION, ASSUMPTION AND PURCHASE AGREEMENT, INCLUDING THE FLEET PURCHASE
AGREEMENT AND RELATED MOA, EACH PARTY ACKNOWLEDGES AND AGREES THAT SUCH PARTY HAS HAD THE OPPORTUNITY TO INSPECT THE VESSELS IN THE INITIAL FLEET, AND SUCH PARTY IS RELYING SOLELY ON ITS OWN INVESTIGATION OF SUCH VESSELS AND NOT ON ANY INFORMATION
PROVIDED OR TO BE PROVIDED BY ANY OF THE OTHER PARTIES. EXCEPT TO THE EXTENT PROVIDED IN THIS CONTRIBUTION, ASSUMPTION AND PURCHASE AGREEMENT AND ANY OTHER DOCUMENT EXECUTED OR DELIVERED IN CONNECTION WITH THIS CONTRIBUTION, ASSUMPTION AND PURCHASE
AGREEMENT, NONE OF THE PARTIES IS LIABLE OR BOUND IN ANY MANNER BY ANY VERBAL OR WRITTEN STATEMENTS, REPRESENTATIONS OR INFORMATION PERTAINING TO THE VESSELS IN THE INITIAL FLEET FURNISHED BY ANY AGENT, EMPLOYEE, SERVANT OR THIRD PARTY. THIS SECTION
SHALL SURVIVE THE CONTRIBUTION AND CONVEYANCE OF THE VESSELS OR THE TERMINATION OF THIS CONTRIBUTION, ASSUMPTION AND PURCHASE AGREEMENT. THE PROVISIONS OF THIS SECTION HAVE BEEN NEGOTIATED BY THE PARTIES AFTER DUE CONSIDERATION AND ARE INTENDED TO
BE A COMPLETE EXCLUSION AND NEGATION OF ANY REPRESENTATIONS OR WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, WITH RESPECT TO THE VESSELS IN THE INITIAL FLEET THAT MAY ARISE PURSUANT TO ANY LAW NOW OR HEREAFTER IN EFFECT, OR OTHERWISE, EXCEPT AS
SET FORTH IN THIS CONTRIBUTION, ASSUMPTION AND PURCHASE AGREEMENT OR THE FLEET 

  
 7 

 
PURCHASE AGREEMENT AND RELATED MOA, OR ANY OTHER DOCUMENT EXECUTED OR DELIVERED IN CONNECTION WITH THIS CONTRIBUTION, ASSUMPTION AND PURCHASE AGREEMENT. 

ARTICLE IV 
 FURTHER
ASSURANCES 
 4.1 Further Assurances. From time to time after the date of this Contribution, Assumption and Purchase Agreement,
and without any further consideration, the Parties agree to execute, acknowledge and deliver all such additional deeds, assignments, bills of sale, conveyances, instruments, notices, releases, acquittances and other documents, and will do all such
other acts and things, all in accordance with applicable Law, as may be necessary or appropriate to (a) more fully to assure that the applicable Parties own all of the assets, properties, rights, titles, interests, estates, remedies, powers and
privileges granted by this Contribution, Assumption and Purchase Agreement, or which are intended to be so granted, (b) more fully and effectively to vest in the applicable Parties and their respective successors and assigns beneficial and
record title to the assets and interests contributed and assigned by this Contribution, Assumption and Purchase Agreement or intended so to be and (c) to more fully and effectively carry out the purposes and intent of this Contribution,
Assumption and Purchase Agreement. 
 4.2 Power of Attorney. Each Party that has conveyed any assets or interests as reflected by
this Contribution, Assumption and Purchase Agreement (collectively, the “Conveying Parties”) hereby constitutes and appoints the MLP GP (the “Attorney-in-Fact”) its true and lawful attorney-in-fact with full power of substitution
for it and in its name, place and stead or otherwise on behalf of the applicable Conveying Party and its successors and assigns, and for the benefit of the Attorney-in-Fact to demand and receive from time to time the assets and interests contributed
and conveyed by this Contribution, Assumption and Purchase Agreement (or intended so to be) and to execute in the name of the applicable Conveying Party and its successors and assigns instruments of conveyance, instruments of further assurance and
to give receipts and releases in respect of the same, and from time to time to institute and prosecute in the name of the applicable Conveying Party for the benefit of the Attorney-in-Fact, any and all proceedings at law, in equity or otherwise
which the Attorney-in-Fact may deem proper in order to (a) collect, assert or enforce any claims, rights or titles of any kind in and to the assets and interests, (b) defend and compromise any and all actions, suits or proceedings in
respect of any of the assets and interests, and (c) do any and all such acts and things in furtherance of this Contribution, Assumption and Purchase Agreement as the Attorney-in-Fact shall deem advisable. Each Conveying Party hereby declares
that the appointment hereby made and the powers hereby granted are coupled with an interest and are and shall be irrevocable and perpetual and shall not be terminated by any act of any Conveying Party or its successors or assigns or by operation of
law. 
 ARTICLE V 

MISCELLANEOUS 
 5.1
Survival of Representations and Warranties. The representations and warranties of the Parties in this Contribution, Assumption and Purchase Agreement and in or under any documents, instruments and agreements delivered pursuant to this
Contribution, Assumption and Purchase Agreement, will survive the completion of the transactions contemplated hereby regardless of any independent investigations that the MLP may make or cause to be made, or knowledge it may have, prior to the date
of this Contribution, Assumption and Purchase Agreement and will continue in full force and effect for a period of one year from 

  
 8 

 
the date of this Contribution, Assumption and Purchase Agreement. At the end of such period, such representations and warranties will terminate, and no claim may be brought by any Party
thereafter in respect of such representations and warranties, except for claims that have been asserted by a Party prior to the date of such termination. 

5.2 Costs. Ocean Rig shall pay any and all sales, use and similar taxes arising out of the contributions, conveyances and deliveries
to be made hereunder, and shall pay all documentary, filing, recording, transfer, deed, and conveyance taxes and fees required in connection therewith. 

5.3 Headings; References; Interpretation. All Article and Section headings in this Contribution, Assumption and Purchase Agreement are
for convenience only and shall not be deemed to control or affect the meaning or construction of any of the provisions hereof. The words “hereof,” “herein” and “hereunder” and words of similar import, when used in this
Contribution, Assumption and Purchase Agreement, shall refer to this Contribution, Assumption and Purchase Agreement as a whole and not to any particular provision of this Contribution, Assumption and Purchase Agreement. All references herein to
Articles and Sections shall, unless the context requires a different construction, be deemed to be references to the Articles and Sections of this Contribution, Assumption and Purchase Agreement, respectively. All personal pronouns used in this
Contribution, Assumption and Purchase Agreement, whether used in the masculine, feminine or neuter gender, shall include all other genders, and the singular shall include the plural and vice versa. The use herein of the word “including”
following any general statement, term or matter shall not be construed to limit such statement, term or matter to the specific items or matters set forth immediately following such word or to similar items or matters, whether or not non-limiting
language (such as “without limitation,” “but not limited to,” or words of similar import) is used with reference thereto, but rather shall be deemed to refer to all other items or matters that could reasonably fall within the
broadest possible scope of such general statement, term or matter. 
 5.4 Successors and Assigns. The Agreement shall be binding
upon and inure to the benefit of the Parties and their respective successors and assigns. 
 5.5 No Third Party Rights. The
provisions of this Contribution, Assumption and Purchase Agreement are intended to bind the Parties as to each other and are not intended to and do not create rights in any other person or confer upon any other person any benefits, rights or
remedies and no person is or is intended to be a third party beneficiary of any of the provisions of this Contribution, Assumption and Purchase Agreement. 

5.6 Counterparts. This Contribution, Assumption and Purchase Agreement may be executed in any number of counterparts, all of which
together shall constitute one agreement binding on the parties hereto. 
 5.7 Governing Law. This Contribution, Assumption and
Purchase Agreement shall be governed by and construed in accordance with the laws of the State of New York without giving effect to any choice of law rules or provisions (whether of the State of New York or any other jurisdiction) that would cause
the application of the laws of any jurisdiction other than the State of New York. Each of the parties hereto submits to the exclusive jurisdiction of the United States District Court for the Southern District of New York (or, if jurisdiction in that
court is not available, then any state court located within the Borough of Manhattan, City of New York) for any and all legal actions arising out of or in connection with this Agreement, and each party agrees not to assert, by way of motion, as a
defense or otherwise, in any such claim, that it 

  
 9 

 
is not subject personally to the jurisdiction of such court, that the claim is brought in an inconvenient forum, that the venue of the claim is improper or that this Agreement or the subject
matter hereof may not be enforced in or by such court 
 5.8 Severability. If any of the provisions of this Contribution, Assumption
and Purchase Agreement are held by any court of competent jurisdiction to contravene, or to be invalid under, the laws of any governmental body having jurisdiction over the subject matter hereof, such contravention or invalidity shall not invalidate
the entire Agreement. Instead, this Contribution, Assumption and Purchase Agreement shall be construed as if it did not contain the particular provision or provisions held to be invalid, and an equitable adjustment shall be made and necessary
provision added so as to give effect, as nearly as possible, to the intention of the Parties as expressed in this Contribution, Assumption and Purchase Agreement at the time of execution of this Contribution, Assumption and Purchase Agreement. 

5.9 Deed; Bill of Sale; Assignment. To the extent required and permitted by applicable Law, this Contribution, Assumption and Purchase
Agreement shall also constitute a “deed,” “bill of sale” or “assignment” of the Initial Fleet. 
 5.10
Amendment or Modification. This Contribution, Assumption and Purchase Agreement may be amended or modified from time to time only by the written agreement of all the Parties hereto. 

5.11 Integration. This Contribution, Assumption and Purchase Agreement and the instruments referenced herein supersede all previous
understandings or agreements among the Parties, whether oral or written, with respect to its subject matter hereof. This Contribution, Assumption and Purchase Agreement and such instruments contain the entire understanding of the Parties with
respect to the subject matter hereof and thereof. No understanding, representation, promise or agreement, whether oral or written, is intended to be or shall be included in or form part of this Contribution, Assumption and Purchase Agreement unless
it is contained in a written amendment hereto executed by the Parties hereto after the date of this Contribution, Assumption and Purchase Agreement. 

[Remainder of Page Intentionally Left Blank] 

  
 10 

 IN WITNESS WHEREOF, this Contribution and, Assumption and Purchase Agreement has been duly
executed by the parties set forth below. 
  

			
	OCEAN RIG UDW INC.
		
	By:	 	  

	Name:	 	
	Title	 	Authorized Signatory
	
	OCEAN RIG PARTNERS GP LLC
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	OCEAN RIG PARTNERS LP
	
	By: Ocean Rig Partners GP LLC, as general partner
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	OCEAN RIG HOLDINGS INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	OCEAN RIG MLP HOLDINGS INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory

 (Signature page to the Contribution, Assumption and Purchase Agreement) 

 
			
	OCEAN RIG OPERATING PARTNERS GP LLC
		
	By:	 	  

	Name:	 	
	Title	 	Authorized Signatory
	
	OCEAN RIG OPERATING LP
	By: Ocean Rig Operating Partners GP LLC, as general partner
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIPS OCEAN VENTURES INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIP SKIATHOS SHAREHOLDERS INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIP SKIATHOS OWNERS INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory

  
 (Signature page to the
Contribution, Assumption and Purchase Agreement) 

 
			
	DRILLSHIP SKYROS SHAREHOLDERS INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIP SKYROS OWNERS INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIP KYTHNOS SHAREHOLDERS INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIP KYTHNOS OWNERS INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIPS OCEAN VENTURES II INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory

  
 (Signature page to the
Contribution, Assumption and Purchase Agreement) 

			
	DRILLSHIP SKIATHOS SHAREHOLDERS II INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIP SKIATHOS OWNERS II INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIP SKYROS SHAREHOLDERS II INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIP SKYROS OWNERS II INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIP KYTHNOS SHAREHOLDERS II INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	DRILLSHIP KYTHNOS OWNERS II INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory

  
 (Signature page to the
Contribution, Assumption and Purchase Agreement) 

 
			
	DRILLSHIPS OCEAN VENTURES OPERATIONS INC.
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory
	
	OCEAN RIG BLOCK 33 BRASIL COOPERATIEF UA
		
	By:	 	  

	Name:	 	
	Title:	 	Authorized Signatory

  
 (Signature page to the
Contribution, Assumption and Purchase Agreement)

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