Exhibit 21 HALLIBURTON COMPANY SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 1996 State Or Country Of Name Of Company Incorporation Avalon Financial Services, Ltd. Cayman Islands Breswater Marine Contracting BV Netherlands Brown & Root (Overseas) Limited United Kingdom Brown & Root A/S Norway Brown & Root Corporate Services, Inc. Delaware Brown & Root Ealing Technical Services Limited United Kingdom Brown & Root Energy Services A/S Norway Brown & Root Far East Engineers Pte Ltd. Delaware Brown & Root Highlands Fabricators Limited United Kingdom Brown & Root Holdings, Inc. Delaware Brown & Root Industrial Services, Inc. Delaware Brown & Root International, Inc. Delaware Brown & Root International, Inc. (Panama) Panama Brown & Root Limited United Kingdom Brown & Root NA Limited British Virgin Islands Brown & Root Projects Limited United Kingdom Brown & Root Pty Limited Australia Brown & Root Saudi Limited Co. Saudi Arabia Brown & Root Services Corporation Delaware Brown & Root Skoda SRO Ltd. Czech Republic Brown & Root Technical Services, Inc. Delaware Brown & Root Toll Road Investment Partners, Inc. Delaware Brown & Root, Inc. Delaware Dawson Group Pty Ltd. Australia European Marine Contractors Limited United Kingdom G&H Management Company Delaware Gearhart (United Kingdom) Limited United Kingdom Halliburton (Proprietary) Limited South Africa Halliburton Affiliates Corporation Delaware Halliburton Argentina SA Argentina Halliburton Australia Pty Ltd. Australia Halliburton BV Netherlands Halliburton Canada Inc. Canada Halliburton Company Germany GmbH Germany Halliburton de Mexico, SA de CV Mexico Halliburton Delaware, Inc. Delaware Halliburton Energy Services Asia, Inc. Texas Halliburton Energy Services Nigeria Limited Nigeria Halliburton Energy Services, Inc. Delaware Halliburton Equipment Company SAE Egypt Halliburton Global, Ltd. Cayman Islands Halliburton Holdings Limited United Kingdom Halliburton Holdings, Inc. Delaware Halliburton International, Inc. Delaware Halliburton Italiana SpA Italy Halliburton Latin America SA Panama Halliburton Limited United Kingdom Halliburton Manufacturing and Services Limited United Kingdom Exhibit 21 (Cont.) HALLIBURTON COMPANY SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 1996 State Or Country Of Name Of Company Incorporation Halliburton Norway, Inc. Delaware Halliburton NUS Corporation Delaware Halliburton Offshore Services, Inc. Delaware Halliburton Overseas Limited Cayman Islands Halliburton Products & Services Limited Cayman Islands Halliburton SAS France Halliburton Servicos Ltda Brazil Halliburton Singapore Pte Ltd. Singapore Halliburton West Africa Ltd. Delaware Halliburton Worldwide Limited Cayman Islands HLS (West Africa) Holdings, Inc. Texas HLS Well Evaluation Limited United Kingdom Howard Humphreys & Partners Limited United Kingdom Howard Humphreys Group Limited United Kingdom Hunting- Brae Limited United Kingdom Landmark EAME, Ltd. United Kingdom Landmark Graphics Corporation Delaware Landmark Graphics Europe/Africa, Inc. Delaware Laurel Financial Services BV Netherlands MIHC, Inc. Delaware Overseas Marine Leasing Company Delaware PT Gema Sembrown Indonesia PT Halliburton Indonesia Indonesia PT Halliburton Logging Services Indonesia Indonesia Rockwater Holdings Limited United Kingdom Rockwater Limited United Kingdom Rockwater, Inc. Delaware Seaforth Maritime Limited United Kingdom Servicios Halliburton de Venezuela, SA Delaware (1) Each of the subsidiaries named conducts its business under its corporate name and, in a few instances, under a shortened form of its corporate name. (2) Registrant has 100% direct or indirect ownership in the subsidiaries named except for the following: Brown & Root NA Limited, 50%; Brown & Root Saudi Limited Co., 49%; Brown & Root Skoda SRO Ltd., 66%; European Marine Contractors Ltd., 50%; Halliburton Energy Services Nigeria Limited, 80%; European Marine Contractors Ltd., 50%; Halliburton Energy Services Nigeria Limited, 80%; European Marine Contractors Ltd., 50%; Halliburton Energy Services Nigeria Limited, 80%; Halliburton Equipment Company SAE, 75%; Hunting-Brae Limited, 31%; PT Gema Sembrown, 45%; Brown & Root Energy Services A/S, 75%; PT Halliburton Indonesia, 80%; and PT Halliburton Logging Services Indonesia, 80%. (3) The names of approximately 146 subsidiaries have been omitted since the unnamed subsidiaries considered in the aggregate would not constitute a significant subsidiary as defined by Item 601(b)(21).