EXHIBIT 21.1 SUBSIDIARIES The following table sets forth the subsidiaries of Noble Corporation as of March 1, 2004 excluding certain subsidiaries that, if considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary (as defined in Rule 1-02 (W) of Regulation S-X): SUBSIDIARY NAME INCORPORATED OR ORGANIZED IN: - ---------------------------------------------------------------------------------------------------- Noble Holding (U.S.) Corporation (1) Delaware Noble Drilling Holding Limited (1) Cayman Islands Noble Drilling (Cyprus) Limited (1) Cyprus Noble Engineering & Development Limited (1) Cayman Islands Noble Downhole Technology Ltd. (1) Cayman Islands Noble Drilling Corporation (2) Delaware Noble Wellbore Technologies Inc. (2) Delaware Noble Drilling Holding LLC (3) Delaware Noble Drilling Americas LLC (3) Delaware Noble International Services LLC (3) Delaware Noble Engineering & Development de Venezuela C.A. (4) Venezuela Noble Drilling (Deutschland) GmbH (5) Germany Noble Technology (Canada) Ltd. (5) Canada Noble Drilling International Inc.(6) Delaware Noble Drilling Services Inc. (6) Delaware Noble Drilling (U.S.) Inc. (6) Delaware Noble Earl Frederickson LLC (6) Delaware Triton Engineering Services Company (6) Delaware Noble Drilling (Denmark) Holding ApS (7) Denmark Noble (Middle East) Limited (7) Cayman Islands WELLDONE Engineering GmbH (8) Germany Noble Drilling International (Cayman) Ltd. (9) Cayman Islands Noble Drilling (Canada) Ltd. (9) Alberta Noble Drilling (Jim Thompson) Inc. (10) Delaware Noble Drilling (Paul Romano) Inc. (10) Delaware Noble (Gulf of Mexico) Inc. (10) Delaware Noble Drilling Exploration Company (10) Delaware Noble Asset Mexico LLC (10) Delaware Noble Bill Jennings LLC (10) Delaware Noble Johnnie Hoffman LLC (10) Delaware Noble John Sandifer LLC (10) Delaware Noble Leonard Jones LLC (10) Delaware Triton Engineering Services Company, S.A.(11) Venezuela Triton International, Inc. (11) Delaware Noble Drilling (Norway) A S (12) Norway Noble Drilling Services (Norge) A S (12) Norway International Directional Services Ltd. (13) Bermuda Johnson Trading Holdings S A R L (13) Luxembourg Noble do Brasil S/C Ltda. (13) Brazil Noble Asset Company Limited (13) Cayman Islands Noble Asset (U.K.) Limited (13) Cayman Islands Noble Contracting GmbH (13) Switzerland Noble Drilling (Nigeria) Ltd. (13) Nigeria Noble Drilling (Paul Wolff) Ltd. (13) Cayman Islands Noble Drilling (TVL) Ltd. (13) Cayman Islands Noble Enterprises Limited (13) Cayman Islands Noble International Finance Company (13) Cayman Islands Noble International Limited (13) Cayman Islands Noble Mexico Limited (13) Cayman Islands Noble-Neddrill International Limited (13) Cayman Islands Noble Drilling (N.S.) Limited (13) U.K. Noble Drilling (Denmark) ApS (13) Denmark Noble Offshore Real Estate Ltd. (13) Cayman Islands Noble Campeche Limited (13) Cayman Islands Noble Deepwater Mexico Limited (13) Cayman Islands SUBSIDIARIES SUBSIDIARY NAME INCORPORATED OR ORGANIZED IN: - ---------------------------------------------------------------------------------------------------- Noble Drilling (Carmen) Limited (13) Cayman Islands Noble Gene Rosser Limited (13) Cayman Islands Noble Mexico Services Limited (13) Cayman Islands Noble Offshore Contracting Limited (13) Cayman Islands Noble Offshore Mexico Limited (13) Cayman Islands 372733 Alberta Inc. (14) Alberta Bawden Drilling Inc. (14) Delaware Bawden Drilling International Ltd. (14) Bermuda Noble International Services Ltd. (14) Bermuda Triton Drilling Services Nigeria Limited (15) Nigeria Triton International de Mexico, S.A. de C.V. (15) Mexico TSIA International (Antilles) N.V. (16) Antilles Noble Rochford Drilling Ltd. (16) Cayman Islands Noble Rochford Drilling (North Sea) Ltd. (16) Cayman Islands Arktik Drilling Limited, Inc. (17) Bahamas Noble Drilling (U.K.) Ltd. (18) U.K. Noble Drilling (Land Support) Limited (18) U.K. Noble Drilling International Ltd. (19) Bermuda Noble Drilling International Services Ptd. Ltd. (19) Singapore Noble Drilling (Malaysia) Sdn. Bhd. (19) Malaysia Noble Drilling Arabia Limited (20) Saudi Arabia Noble Drilling de Venezuela C.A. (20) Venezuela Noble Offshore de Venezuela C.A. (20) Venezuela Resolute Insurance Group Ltd. (21) Bermuda Noble Drilling (Nederland) B.V. (22) The Netherlands Noble CROSCO Drilling Ltd. (23) Cayman Islands Maragem A S (24) Norway Noble CROSCO Operating Ltd. (25) Cayman Islands Sedco Dubai LLC (26) Dubai Maurer Technology Incorporated (27) Delaware (1) 100% owned by Noble Corporation (2) 100% owned by Noble Holding (U.S.) Corporation (3) 100% owned by Noble Drilling Holding Limited (4) 100% owned by Noble Engineering & Development Limited (5) 100% owned by Noble Downhole Technology Ltd. (6) 100% owned by Noble Drilling Corporation (7) 100% owned by Noble Drilling Holding LLC (8) 100% owned by Noble Drilling (Deutschland) GmbH (9) 100% owned by Noble Drilling International Inc. (95% in the case of Noble Drilling International (Cayman) Ltd.) (10) 100% owned by Noble Drilling (U.S.) Inc. (11) 100% owned by Triton Engineering Services Company (12) 100% owned by Noble Drilling (Denmark) Holding ApS (13) 100% owned by Noble Drilling International (Cayman) Ltd. (14) 100% owned by Noble Drilling (Canada) Ltd. (15) 100% owned by Triton International Inc. (16) 100% owned by Noble Asset Company Limited (17) Joint venture (owned 82% by Noble Asset Company Limited) (18) 100% owned by Noble Drilling (N.S.) Limited (19) 100% owned by Noble Enterprises Limited (70% in the case of Noble Drilling (Malaysia) Sdn. Bhd.) (20) 100% owned by Noble International Limited (21) 100% owned by Bawden Drilling International Ltd. (22) 100% owned by Noble Drilling (Denmark) ApS (23) Joint venture (owned 50% by Noble Asset Company Limited) (24) 11% owned by Noble Drilling Services (Norge) A S (25) 100% owned by Noble CROSCO Drilling Ltd. (26) Joint venture (owned 49% by Noble Drilling Holding LLC) (27) 100% owned by Noble Wellbore Technologies Inc.