Entities as of December 31, 2011 Jurisdiction Registered City Share Capital Currency Interest Transocean Investments S.a.r.l. Luxembourg Luxembourg 12,500.00 (European Union) Euro 100.00 Transocean Jupiter LLC Delaware Dover 1,000.00 (United States) Dollar 100.00 Transocean Key Hawaii Limited Cayman Islands Grand Cayman 1,000.00 (United States) Dollar 100.00 Transocean Key Singapore Limited Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean Labrador Limited Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean LR34 LLC Delaware Dover 1,000.00 (United States) Dollar 100.00 Transocean Magellan Limited Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean Management Inc. Delaware Dover 10.00 (United States) Dollar 100.00 Transocean Management Ltd. Switzerland Vernier 100,000.00 (Switzerland) Franc 100.00 Transocean Marine Limited Cayman Islands Grand Cayman 0.01 (United States) Dollar 100.00 Transocean Mediterranean LLC Delaware Dover 1,000.00 (United States) Dollar 100.00 Transocean Nautilus Limited Cayman Islands Grand Cayman 1,000.00 (United States) Dollar 100.00 Transocean North Sea Limited Bahamas Nassau 10.00 (United States) Dollar 100.00 Transocean Norway Drilling AS Norway Stavanger 299,194,832.00 (Norway) Krone 100.00 Transocean Norway Operations AS Norway Stavanger 1,000,000.00 (Norway) Krone 100.00 Transocean Norway Operations Support AS Norway Stavanger 100,000.00 (Norway) Krone 100.00 Transocean Offshore (Cayman) Inc. Cayman Islands Grand Cayman 1,000.00 (United States) Dollar 100.00 Transocean Offshore (North Sea) Ltd. Cayman Islands Grand Cayman 100.00 (United States) Dollar 100.00 Transocean Offshore (U.K.) Inc. Delaware Wilmington 1,000.00 (United States) Dollar 100.00 Transocean Offshore Canada Services Ltd. Nova Scotia Halifax 0.00 (United States) Dollar 100.00 Transocean Offshore Caribbean Sea, L.L.C. Delaware Wilmington 1,000.00 (United States) Dollar 100.00 Transocean Offshore D.V. Inc. Delaware Wilmington 10.00 (United States) Dollar 100.00 Transocean Offshore Deepwater Drilling Inc. Delaware Wilmington 10.00 (United States) Dollar 100.00 Transocean Offshore Deepwater Holdings Limited Cayman Islands Grand Cayman 1,000.00 (United States) Dollar 100.00 Transocean Offshore Drilling Holdings Limited Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean Offshore Drilling Limited England London 2,000,002.00 (Great Britain) Pound 100.00 Transocean Offshore Drilling Services LLC Delaware Dover 1,000.00 (United States) Dollar 100.00 Transocean Offshore Europe Limited Cayman Islands Grand Cayman 4,384.30 (United States) Dollar 100.00 Transocean Offshore Gulf of Guinea II Limited British Virgin Islands Tortola 10.00 (United States) Dollar 100.00 Transocean Offshore Gulf of Guinea III Limited British Virgin Islands Tortola 10.00 (United States) Dollar 100.00 Transocean Offshore Gulf of Guinea IV Limited British Virgin Islands Tortola 10.00 (United States) Dollar 100.00 Transocean Offshore Gulf of Guinea Limited British Virgin Islands Tortola 10.00 (United States) Dollar 100.00 Transocean Offshore Holdings Limited Cayman Islands Grand Cayman 1,000.00 (United States) Dollar 100.00 Transocean Offshore International Limited Cayman Islands Grand Cayman 2,500.00 (United States) Dollar 100.00 Transocean Offshore International Ventures Limited Cayman Islands Grand Cayman 591,504,000.00 (United States) Dollar 100.00 Transocean Offshore Limited Cayman Islands Grand Cayman 3.36 (United States) Dollar 100.00 Transocean Offshore Management Services Limited Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean Offshore Nigeria Limited Nigeria Lagos 1,250,000.00 (Nigeria) Naira 100.00 Transocean Offshore Norway Inc. Delaware Wilmington 10,000.00 (United States) Dollar 100.00 Transocean Offshore Norway Services AS Norway Stavanger 1,000,000.00 (Norway) Krone 100.00 Transocean Offshore PR Limited Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean Offshore Resources Limited Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean Offshore Resources Limited II Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean Offshore Services Ltd. Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean Offshore USA Inc. Delaware Wilmington 10,000.00 (United States) Dollar 100.00 Transocean Offshore Ventures Inc. Delaware Wilmington 10,000.00 (United States) Dollar 100.00 Transocean Onshore Support Services Limited Scotland Aberdeen 1.00 (Great Britain) Pound 100.00 Transocean Pacific Drilling Holdings Limited Cayman Islands Grand Cayman 10.00 (United States) Dollar 100.00 Transocean Pacific Drilling Inc. British Virgin Islands Tortola 500.00 (United States) Dollar 50.00 Transocean Payroll Services SRL Barbados St. Michael 1,000.00 (Barbados) Dollar 100.00 Transocean Perfuracoes Ltda. Brazil Macae 1,000.00 (Brazil) Real 100.00 Transocean Rig 140 Limited Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean Rig Management Limited Cayman Islands Grand Cayman 1.00 (United States) Dollar 100.00 Transocean Rig Services Offshore LLC Delaware Wilmington 1,000.00 (United States) Dollar 100.00 Transocean Sedco Forex Ventures Limited Cayman Islands Grand Cayman 1,000.00 (United States) Dollar 100.00

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