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EXHIBIT 21.1 GLOBALSANTAFE CORPORATION
AND SUBSIDIARIES
March 11, 2004 PERCENT OFSTATE OR OTHER
    
    VOTING STOCKJURISDICTION OF
    
    OWNED BYNAME OF COMPANY
    
    INCORPORATION
    
    IMMEDIATEGlobalSantaFe Corporation
    
    Cayman IslandsEntities Holdings, Inc.
    
    Delaware
    
    
    100
    %Key Perfuracoes Maritimas Limitada
    
    Brazil
    
    
    100
    %MSF Offshore Services India Private Limited
    
    India
    
    
    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
    %Geothermal Royalty Holdings, Inc.
    
    Delaware
    
    
    100
    %GlobalSantaFe Asset Holdings Inc.
    
    British Virgin Islands
    
    
    100
    %GlobalSantaFe International Drilling Corporation
    
    Bahamas
    
    
    57.6
    %(a)Global Offshore Drilling Limited
    
    Nigeria
    
    
    65
    %GlobalSantaFe Holdings ApS
    
    Denmark
    
    
    100
    %GlobalSantaFe Drilling Adriatic AS
    
    Norway
    
    
    100
    %GlobalSantaFe Drilling Norway AS
    
    Norway
    
    
    100
    %GlobalSantaFe Drilling Services AS
    
    Norway
    
    
    100
    %GlobalSantaFe High Island III AS
    
    Norway
    
    
    100
    %GlobalSantaFe International Operations Corporation
    
    British Virgin Islands
    
    
    77.51
    %(b)GlobalSantaFe Services (BVI) Inc.
    
    British Virgin Islands
    
    
    100
    %GlobalSantaFe Drilling (BVI) Inc.
    
    British Virgin Islands
    
    
    100
    %GlobalSantaFe Denmark Holdings ApS
    
    Denmark
    
    
    100
    %GlobalSantaFe B.V.
    
    Netherlands
    
    
    100
    %GlobalSantaFe International (Canada) Drilling Company
    
    Nova Scotia
    
    
    100
    %GlobalSantaFe Norway AS
    
    Norway
    
    
    100
    %GlobalSantaFe do Brasil Ltda.
    
    Brazil
    
    
    96.8
    %(c)GlobalSantaFe Drilling (South Atlantic) Inc.
    
    British Virgin Islands
    
    
    100
    %GlobalSantaFe Drilling U.K. Limited
    
    Scotland
    
    
    100
    %GlobalSantaFe Onshore Services Limited
    
    Scotland
    
    
    100
    %GlobalSantaFe North Sea Limited
    
    Bahamas
    
    
    100
    %GlobalSantaFe Operations (Australia) Pty Ltd
    
    Australia
    
    
    100
    %GlobalSantaFe Overseas Limited
    
    Bahamas
    
    
    100
    %GlobalSantaFe West Africa Drilling Limited
    
    Bahamas
    
    
    100
    %GlobalSantaFe South America LLC
    
    Delaware
    
    
    100
    %GlobalSantaFe Campeche Holdings LLC
    
    Delaware
    
    
    100
    %GlobalSantaFe Mexico Holdings LLC
    
    Delaware
    
    
    100
    %GlobalSantaFe Operations (Mexico) LLC
    
    Delaware
    
    
    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
    %GlobalSantaFe Drilling Operations Inc.
    
    Cayman Islands
    
    
    100
    %Desert Rig 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 Company (Overseas) Limited
    
    England
    
    
    100
    %GlobalSantaFe Drilling Venezuela, C.A.
    
    Venezuela
    
    
    100
    %SantaFe Drilling Company (U.K.) Limited
    
    England
    
    
    100
    %GlobalSantaFe Operations (BVI) Inc.
    
    British Virgin Islands
    
    
    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 Operations (Barbados) Inc.
    
    Cayman Islands
    
    
    100
    %Covent Garden  Servicos de Marketing LDA
    
    Portugal
    
    
    98
    %(d)GlobalSantaFe Financial Services (Luxembourg) S.a.r.l.
    
    Luxembourg
    
    
    99.8
    %(e)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.)Key International Drilling Company Limited
    
    Bermuda
    
    
    100
    %Platform Capital N.V.
    
    Netherlands Antilles
    
    
    100
    %GlobalSantaFe Nederland B.V.
    
    Nertherlands
    
    
    100
    %GlobalSantaFe AG
    
    Switzerland
    
    
    100
    %GlobalSantaFe Drilling Company (Canada) Limited
    
    Nova Scotia
    
    
    100
    %GlobalSantaFe (Norge) AS
    
    Norway
    
    
    100
    %Platform Financial N.V.
    
    Netherlands Antilles
    
    
    100
    %Santa Fe Drilling Company (Italy) S.r.l.
    
    Italy
    
    
    100
    %Santa Fe Drilling (Nigeria) Limited
    
    Nigeria
    
    
    60
    %Santa Fe Operations (Nigeria) Limited
    
    Nigeria
    
    
    60
    %Saudi Drilling Company Limited
    
    Saudi Arabia
    
    
    90
    %(f)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
    %Global Marine Drilling (Malaysia) Sdn. Bhd.
    
    Malaysia
    
    
    100
    %GlobalSantaFe Arctic Ltd.
    
    Canada
    
    
    100
    %GlobalSantaFe Capital Investments Inc.
    
    Delaware
    
    
    100
    %GlobalSantaFe Beaufort Sea Inc.
    
    Delaware
    
    
    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
    %(g)GlobalSantaFe Caribbean Inc.
    
    California
    
    
    100
    %GlobalSantaFe Development Inc.
    
    California
    
    
    100
    %GlobalSantaFe Drilling Trinidad LLC
    
    Delaware
    
    
    100
    %GlobalSantaFe GOM Services Inc.
    
    Delaware
    
    
    100
    %GlobalSantaFe Leasing Corporation
    
    Bahamas
    
    
    100
    %GlobalSantaFe C.R. Luigs Limited
    
    England
    
    
    100
    %Resource Rig Supply Inc.
    
    Delaware
    
    
    100
    %GlobalSantaFe Communications, Inc.
    
    Delaware
    
    
    100
    %Santa Fe Construction Co.
    
    Delaware
    
    
    100
    %Intermarine Services Inc.
    
    Texas
    
    
    100
    %Turnkey Ventures de Mexico Inc.
    
    Delaware
    
    
    100
    %
 NOTES:  (a)
    
    The remaining 42.4% is owned directly by GlobalSantaFe Drilling Company.(b)
    
    The remaining 22.49% is owned directly by GlobalSantaFe Corporation.(c)
    
    The remaining 3.2% is owned directly by GlobalSantaFe Overseas Limited.(d)
    
    The remaining 2% is owned directly by GlobalSantaFe Holdings Delaware LLC.(e)
    
    The remaining 0.20% is owned directly by GlobalSantaFe Holdings Delaware LLC.(f)
    
    The remaining 10% is owned directly by GlobalSantaFe Nederland B.V.(g)
    
    The remaining 50% is owned directly by Global Marine Inc.