EXHIBIT 21.1

GLOBALSANTAFE CORPORATION

AND SUBSIDIARIES

February 24, 2006



|                                                      |  |                                              |  |                                               |     
|----------------------------------------------------- |  | -------------------------------------------- |  | --------------------------------------------- | ----
|Name of Company                                       |  | State or Other Jurisdiction of Incorporation |  | Percent ofVoting StockOwned byImmediateParent |     
|GlobalSantaFe Corporation                             |  | Cayman Islands                               |  |                                               |     
|Entities Holdings, Inc.                               |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Holding Company                         |  | Delaware                                     |  | 100                                           | %   
|Key Perfuracoes Maritimas Limitada                    |  | Brazil                                       |  | 100                                           | %   
|Santa Fe Braun Inc.                                   |  | Delaware                                     |  | 100                                           | %   
|Santa Fe Drilling Company of Venezuela, C.A.          |  | California                                   |  | 100                                           | %   
|Santa Fe Servicos de Perfuracao Limitada              |  | Brazil                                       |  | 100                                           | %   
|GlobalSantaFe International Drilling Corporation      |  | Bahamas                                      |  | 100                                           | %   
|GlobalSantaFe International Operations Corporation    |  | British Virgin Islands                       |  | 77.51                                         | %(a)
|GlobalSantaFe Services (BVI) Inc.                     |  | British Virgin Islands                       |  | 100                                           | %   
|GlobalSantaFe International Drilling Inc.             |  | British Virgin Islands                       |  | 100                                           | %   
|Global Offshore Drilling Limited                      |  | Nigeria                                      |  | 70                                            | %   
|GlobalSantaFe Denmark Holdings ApS                    |  | Denmark                                      |  | 100                                           | %   
|GlobalSantaFe B.V.                                    |  | Netherlands                                  |  | 100                                           | %   
|Challenger Minerals (Nigeria) Limited                 |  | NIgeria                                      |  | 99                                            | %(b)
|GlobalSantaFe International (Canada) Drilling Company |  | Nova Scotia                                  |  | 100                                           | %   
|GlobalSantaFe Servicios de Venezuela, C.A.            |  | Venezuela                                    |  | 99.01                                         | %(c)
|GlobalSantaFe do Brasil Ltda.                         |  | Brazil                                       |  | 99                                            | %(d)
|GlobalSantaFe North Sea Limited                       |  | Bahamas                                      |  | 100                                           | %   
|GlobalSantaFe Operations (Australia) Pty Ltd          |  | Australia                                    |  | 100                                           | %   
|GlobalSantaFe Overseas Limited                        |  | Bahamas                                      |  | 100                                           | %   
|GlobalSantaFe Services (Egypt) LLC                    |  | Egypt                                        |  | 75                                            | %   
|GlobalSantaFe South America LLC                       |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Campeche Holdings LLC                   |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Drilling Mexico, S. de R.L. de C.V.     |  | Mexico                                       |  | 99.99                                         | %(e)
|GlobalSantaFe Mexico Holdings LLC                     |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Operations (Mexico) LLC                 |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Tampico, S. de R.L. de C.V.             |  | Mexico                                       |  | 99.99                                         | %(f)
|GlobalSantaFe Southeast Asia (Drilling) Pte. Ltd.     |  | Singapore                                    |  | 100                                           | %   
|Intermarine Services (International) Limited          |  | Bahamas                                      |  | 100                                           | %   
|GlobalSantaFe Drilling (N.A.) N.V.                    |  | Netherlands Antilles                         |  | 100                                           | %   
|GlobalSantaFe Services Netherlands B.V.               |  | Netherlands                                  |  | 100                                           | %   
|P.T. Santa Fe-Pomeroy Indonesia                       |  | Indonesia                                    |  | 70                                            | %   
|P.T. Santa Fe Supraco Indonesia                       |  | Indonesia                                    |  | 95                                            | %   

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|                                                              |  |                                              |  |                                               |     
|------------------------------------------------------------- |  | -------------------------------------------- |  | --------------------------------------------- | ----
|Name of Company                                               |  | State or Other Jurisdiction of Incorporation |  | Percent ofVoting StockOwned byImmediateParent |     
|                                                              |  |                                             
|GlobalSantaFe Corporation (continued)                         |  |                                              |  |                                               |     
|                                                              |  |                                             
|GlobalSantaFe Drilling Operations Inc.                        |  | Cayman Islands                               |  | 100                                           | %   
|GlobalSantaFe (Africa) Inc.                                   |  | Cayman Islands                               |  | 100                                           | %   
|GlobalSantaFe (Labuan) Inc.                                   |  | Malaysia                                     |  | 100                                           | %   
|GlobalSantaFe Offshore Services Inc.                          |  | Cayman Islands                               |  | 100                                           | %   
|GlobalSantaFe International Services Inc.                     |  | Panama                                       |  | 100                                           | %   
|GlobalSantaFe Drilling Venezuela, C.A.                        |  | Venezuela                                    |  | 100                                           | %   
|GlobalSantaFe Operations (BVI) Inc.                           |  | British Virgin Islands                       |  | 100                                           | %   
|GlobalSantaFe Leasing Limited                                 |  | British Virgin Islands                       |  | 100                                           | %   
|GlobalSantaFe Hungary Services Limited Liability Company      |  | Hungary                                      |  | 99.3                                          | %(g)
|Platform Capital N.V.                                         |  | Netherlands Antilles                         |  | 100                                           | %   
|GlobalSantaFe Nederland B.V.                                  |  | Netherlands                                  |  | 100                                           | %   
|GlobalSantaFe AG                                              |  | Switzerland                                  |  | 100                                           | %   
|GlobalSantaFe Drilling Company (Canada) Limited               |  | Nova Scotia                                  |  | 100                                           | %   
|GlobalSantaFe Drilling Company (Overseas) Limited             |  | England                                      |  | 100                                           | %   
|GlobalSantaFe Drilling U.K. Limited                           |  | Scotland                                     |  | 100                                           | %   
|Challenger Minerals (North Sea) Limited                       |  | Scotland                                     |  | 100                                           | %   
|GlobalSantaFe Onshore Services Limited                        |  | Scotland                                     |  | 100                                           | %   
|GlobalSantaFe Holding Company (North Sea) Limited             |  | England                                      |  | 100                                           | %   
|GlobalSantaFe Drilling Company (North Sea) Limited            |  | England                                      |  | 100                                           | %   
|GlobalSantaFe Drilling Services (North Sea) Limited           |  | England                                      |  | 100                                           | %   
|GlobalSantaFe Techserv (North Sea) Limited                    |  | England                                      |  | 100                                           | %   
|GlobalSantaFe Drilling (South Atlantic) Inc.                  |  | British Virgin Islands                       |  | 75                                            | %(h)
|GlobalSantaFe West Africa Drilling Limited                    |  | Bahamas                                      |  | 100                                           | %   
|GlobalSantaFe (Norge) AS                                      |  | Norway                                       |  | 100                                           | %   
|Platform Financial N.V.                                       |  | Netherlands Antilles                         |  | 100                                           | %   
|SantaFe Drilling Company (U.K.) Limited                       |  | England                                      |  | 100                                           | %   
|GlobalSantaFe Operations (Barbados) Inc.                      |  | Cayman Islands                               |  | 100                                           | %   
|Covent GardenServicos de Marketing LDA                       |  | Portugal                                     |  | 98                                            | %(i)
|GlobalSantaFe Financial Services (Luxembourg) S.a.r.l.        |  | Luxembourg                                   |  | 99.93                                         | %(j)
|GlobalSantaFe Group Financing Limited Liability Company       |  | Hungary                                      |  | 100                                           | %   
|GlobalSantaFe Holdings Delaware LLC                           |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe U.S. Holdings Inc.                              |  | Delaware                                     |  | 100                                           | %   
|Oilfield Services, Inc.                                       |  | Cayman Islands                               |  | 100                                           | %   
|Global Marine Inc.                                            |  | Delaware                                     |  | 100                                           | %   
|(See separate section for subsidiaries of Global Marine Inc.) |  |                                              |  |                                               |     
|Santa Fe Drilling (Nigeria) Limited                           |  | Nigeria                                      |  | 60                                            | %   
|Santa Fe Operations (Nigeria) Limited                         |  | Nigeria                                      |  | 60                                            | %   
|Saudi Drilling Company Limited                                |  | Saudi Arabia                                 |  | 90                                            | %(k)

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|                                                        |  |                                              |  |                                               |     
|------------------------------------------------------- |  | -------------------------------------------- |  | --------------------------------------------- | ----
|Name of Company                                         |  | State or Other Jurisdiction of Incorporation |  | Percent ofVoting StockOwned byImmediateParent |     
|                                                        |  |                                             
|Separate Section for Subsidiaries of Global Marine Inc. |  |                                              |  |                                               |     
|                                                        |  |                                             
|Applied Drilling Technology Inc.                        |  | Texas                                        |  | 100                                           | %   
|Eaton Industries of Houston, Inc.                       |  | Texas                                        |  | 100                                           | %   
|Campeche Drilling Services Inc.                         |  | Delaware                                     |  | 100                                           | %   
|Challenger Minerals Inc.                                |  | California                                   |  | 100                                           | %   
|GlobalSantaFe Arctic Ltd.                               |  | Canada                                       |  | 100                                           | %   
|GlobalSantaFe Corporate Services Inc.                   |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe de Venezuela Inc.                         |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Drilling Company                          |  | Delaware                                     |  | 100                                           | %   
|Global Marine do Brasil Perfuracoes Ltda.               |  | Brazil                                       |  | 50                                            | %(l)
|GlobalSantaFe Caribbean Inc.                            |  | California                                   |  | 100                                           | %   
|GlobalSantaFe Deepwater Drilling Inc.                   |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Beaufort Sea Inc.                         |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Development Inc.                          |  | California                                   |  | 100                                           | %   
|GlobalSantaFe GOM Services Inc.                         |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Leasing Corporation                       |  | Bahamas                                      |  | 100                                           | %   
|GlobalSantaFe C.R. Luigs Limited                        |  | England                                      |  | 100                                           | %   
|GlobalSantaFe U.S. Drilling Inc.                        |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Drilling Trinidad LLC                     |  | Delaware                                     |  | 100                                           | %   
|Resource Rig Supply Inc.                                |  | Delaware                                     |  | 100                                           | %   
|GlobalSantaFe Communications, Inc.                      |  | Delaware                                     |  | 100                                           | %   
|Santa Fe Construction Company                           |  | Delaware                                     |  | 100                                           | %   
|Intermarine Services Inc.                               |  | Texas                                        |  | 100                                           | %   
|Turnkey Ventures de Mexico Inc.                         |  | Delaware                                     |  | 100                                           | %   

NOTES:



|(a) | The remaining 22.49% is owned directly by GlobalSantaFe Corporation.
|--- | --------------------------------------------------------------------

|(b) | The remaining 1% is owned directly by GlobalSantaFe International Drilling Inc.
|--- | -------------------------------------------------------------------------------

|(c) | The remaining 0.99% is owned directly by GlobalSantaFe Services (BVI) Inc.
|--- | --------------------------------------------------------------------------

|(d) | The remaining 1% is owned directly by GlobalSantaFe Overseas Limited.
|--- | ---------------------------------------------------------------------

|(e) | Less than .01% is owned directly by GlobalSantaFe Mexico Holdings LLC.
|--- | ----------------------------------------------------------------------

|(f) | Less than .01% is owned directly by GlobalSantaFe Mexico Holdings LLC.
|--- | ----------------------------------------------------------------------

|(g) | The remaining 0.7% is owned directly by GlobalSantafe Services (BVI) Inc.
|--- | -------------------------------------------------------------------------

|(h) | The remaining 25% is owned by GlobalSantaFe Drilling U.K. Limited and a de minimis amount (1 share) is owned by GlobalSantaFe Overseas Limited.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------

|(i) | The remaining 2% is owned directly by GlobalSantaFe Holdings Delaware LLC.
|--- | --------------------------------------------------------------------------

|(j) | Approximately .06% is owned by GlobalSantaFe Operations (Barbados) Inc. and less than .01% is owned directly by GlobalSantaFe Holdings Delaware LLC.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------

|(k) | The remaining 10% is owned directly by GlobalSantaFe Nederland B.V.
|--- | -------------------------------------------------------------------

|(l) | The remaining 50% is owned directly by Global Marine Inc.
|--- | ---------------------------------------------------------

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