0001193125-12-153540 Sample Contracts

OFFSHORE GROUP INVESTMENT LIMITED AND EACH OF THE GUARANTORS PARTY HERETO FOURTH SUPPLEMENTAL INDENTURE Dated as of April 2, 2012 Wells Fargo Bank, National Association, as Trustee and Noteholder Collateral Agent

Fourth Supplemental Indenture • April 6th, 2012 • Vantage Drilling CO • Drilling oil & gas wells • New York

• Contract Type
  Fourth Supplemental Indenture
• Filed
  April 6th, 2012
• Company
  Vantage Drilling CO
• Industry
  Drilling oil & gas wells
• Jurisdiction
  New York

THIS FOURTH SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of April 2, 2012, is by and among Offshore Group Investment Limited, a Cayman Islands exempted company (the “Company”), Vantage Drilling Company, a Cayman Islands exempted company (“Parent”), as a guarantor, Dragonquest Holdings Company, a Cayman Islands exempted company (“Dragonquest Holdings”), Valencia Drilling Poland sp. z o.o. (to be renamed Vantage Drilling Poland sp. z o.o.) (“Vantage Drilling Poland”), Dragonquest Holdings Cyprus ODC Limited (to be renamed Vantage Holdings Cyprus ODC Limited), a company incorporated in the Republic of Cyprus (“Vantage Holdings Cyprus”, and together with Dragonquest Holdings and Vantage Drilling Poland, the “Additional Guarantors”), the other existing guarantors to the Indenture (as defined below) (the “Existing Guarantors”, together with Parent and the Additional Guarantors, the “Guarantors”) and Wells Fargo Bank, National Association, and any and all successors theret

THIRD SUPPLEMENTAL INDENTURE Dated as of June 29, 2011 Wells Fargo Bank, National Association, as Trustee and Noteholder Collateral Agent

Third Supplemental Indenture • April 6th, 2012 • Vantage Drilling CO • Drilling oil & gas wells • New York

• Contract Type
  Third Supplemental Indenture
• Filed
  April 6th, 2012
• Company
  Vantage Drilling CO
• Industry
  Drilling oil & gas wells
• Jurisdiction
  New York

THIS THIRD SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of June 29, 2011, is by and among Offshore Group Investment Limited, a Cayman Islands exempted company (the “Company”), Vantage Driller III Co., a Cayman Islands exempted company (the “Additional Guarantor”), Vantage Drilling Company, a Cayman Islands exempted company (“Parent”), as a guarantor, together with the other existing guarantors to the Indenture (as defined below) (the “Existing Guarantors,” and together with Parent and the Additional Guarantor, the “Guarantors ”) and Wells Fargo Bank, National Association, and any and all successors thereto, as trustee (in such capacity, the “Trustee”) and as collateral agent (in such capacity, the “Noteholder Collateral Agent ”).