Exhibit 21 HALLIBURTON COMPANY SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 1998 STATE OR OWNERSHIP COUNTRY OF NAME OF COMPANY PERCENTAGE INCORPORATION 2W Underwater Contractors Limited 100.0 United Kingdom American Thai Barite Limited 100.0 Thailand AOC Australia Pty. Ltd. 100.0 Australia AOC International Limited 100.0 United Kingdom AOC Wood Contractors Limited 50.0 United Kingdom Asian Marine Contractors Limited 100.0 Mauritius Atlantic Minerals and Products Corporation 100.0 Florida AVA (U.K.) Limited 100.0 England AVA S.A.R.L. 100.0. France Avalon Financial Services, Ltd. 100.0 Cayman Islands Axelson Pump Company 100.0 Delaware Axelson, Inc. 100.0 Delaware Baroid (Far East) Pte. Ltd. 100.0 Singapore Baroid Caribbean Limited 50.0 Cayman Islands Baroid Corporation 100.0 England Baroid Corporation of Canada Ltd. 100.0 Canada Baroid de Venezuela, S.A. 99.73 Venezuela Baroid Equipment, Inc. 100.0 California Baroid GmbH 100.0 Germany Baroid International Inc. 100.0 Delaware Baroid International Trading Corporation 100.0 Delaware Baroid Limited 100.0 England Baroid Middle East, Inc. 100.0 Delaware Baroid Nigeria, Inc. 100.0 Delaware Baroid of Nigeria Limited 60.0 Nigeria Baroid Sales Export Corporation 100.0 Delaware Baroid Technology, Inc. 100.0 Delaware Basin Surveys, Inc. 100.0 West Virginia Breswater Marine Contracting BV 100.0 Netherlands Brown & Root (Overseas) Limited 100.0 United Kingdom Brown & Root AOC Limited 100.0 United Kingdom Brown & Root Condor SPA 49.0 Algeria Brown & Root Ealing Technical Services Limited 100.0 United Kingdom Brown & Root Energy Services A/S 100.0 Norway Brown & Root Energy Services Pty. Ltd. 100.0 Australia Brown & Root Far East Engineers Pte. Ltd. 100.0 Delaware Brown & Root Highlands Fabricators Limited 100.0 United Kingdom Brown & Root Holdings, Inc. 100.0 Delaware Brown & Root International, Inc. 100.0 Delaware 21-1 Exhibit 21 HALLIBURTON COMPANY SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 1998 STATE OR OWNERSHIP COUNTRY OF NAME OF COMPANY PERCENTAGE INCORPORATION Brown & Root International, Inc. 100.0 Panama Brown & Root Limited 100.0 United Kingdom Brown & Root McDermott Fabricators 50.0 United Kingdom Brown & Root NA Limited 50.0 British Virgin Islands Brown & Root Projects Limited 100.0 United Kingdom Brown & Root Pty Limited 100.0 Australia Brown & Root Saudi Limited Co. 49.0 Saudi Arabia Brown & Root Services Corporation 100.0 Delaware Brown & Root Technical Services, Inc. 100.0 Delaware Brown & Root Technology Limited 100.0 United Kingdom Brown & Root, Inc. 100.0 Delaware Canadian Baroid Sales Ltd. 100.0 Canada CEBO International B.V. 50.0 Netherlands Compania Transandina de Exportacion, Inc. 100.0 Delaware Conkel, S. de R.L. de C.V. 100.0 Mexico Dawson Group Pty. Ltd. 100.0 Australia DB Stratabit GmbH 100.0 Germany DB Stratabit Limited 100.0 Scotland DB Stratabit Pte. Ltd. 100.0 Singapore DB Stratabit S. A. R. L. 100.0 Tunisia DB Stratabit S.A. 100.0 Belgium DBS - Tunisie 100.0 Tunisia Devonport Royal Dockyard Limited 51.0 United Kingdom Dorhold Limited 51.0 United Kingdom Dressbi, L.L.C. 100.0 Texas Dresser (Algeria), Inc. 100.0 Delaware Dresser (Holdings) Limited 100.0 England Dresser Acquisitions Limited 100.0 England Dresser AG 100.0 Liechtenstein Dresser Anstalt 100.0 Liechtenstein Dresser Argentina S.A. 100.0 Argentina Dresser AS 100.0 Norway Dresser Australia Pty. Ltd. 100.0 Australia Dresser B.V. 100.0 Netherlands Dresser Canada, Inc. 100.0 Canada Dresser Caspian, Inc. 100.0 Delaware Dresser Corporation 100.0 Nevada Dresser de Venezuela, C.A. 100.0 Venezuela Dresser Europe S.A. 100.0 Belgium 21-2 Exhibit 21 HALLIBURTON COMPANY SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 1998 STATE OR OWNERSHIP COUNTRY OF NAME OF COMPANY PERCENTAGE INCORPORATION Dresser Far East, Inc. 100.0 Delaware Dresser Foreign Sales Corporation Limited 100.0 Guam Dresser Group Pension Trustee Limited 100.0 England Dresser Holding, Inc. 100.0 Delaware Dresser Holmes Limited 100.0 England Dresser Industria e Comercio Ltda. 100.0 Brazil Dresser Industrial Products B.V. 100.0 Netherlands Dresser International Sales Corporation 100.0 Delaware Dresser International, Ltd. 100.0 Delaware Dresser Investments N.V. 100.0 Netherlands Antilles Dresser Ireland Finance Company 100.0 Ireland Dresser Italia S.p.A. 100.0 Italy Dresser Japan Ltd. 100.0 Japan Dresser Kellogg Energy Services Limited 100.0 England Dresser Kellogg Energy Services, Inc. 100.0 Delaware Dresser Korea, Inc. 100.0 Korea Dresser Minerals International, Inc. 100.0 Texas Dresser Netherlands B.V. 100.0 Netherlands Dresser Oil Tools, Inc. 100.0 Delaware Dresser Oilfield Gabon S.a.r.L. 100.0 Gabon Dresser Oilfield Operations (Nigeria) Limited 100.0 Nigeria Dresser Oilfield Operations (Nigeria), Inc. 100.0 Delaware Dresser Oilfield Services B.V. 100.0 Netherlands Dresser Oilfield Services, Inc. 100.0 Delaware Dresser Polska Sp. z o. o 100.0 Poland Dresser Produits Industriels 100.0 France Dresser Russia, Inc. 100.0 Delaware Dresser Services, Inc. 100.0 Delaware Dresser Singapore Pte. Ltd. 100.0 Singapore Dresser South Africa (Pty.) Ltd. 100.0 South Africa Dresser U.K. Limited 100.0 England Dresser U.K. Pensions Limited 100.0 England Dresser Wayne AB 100.0 Sweden Dresser-Nagano, Inc. 71.04 Delaware Dresser-Rand (Nigeria) Ltd. 60.0 Nigeria Dresser-Rand (U.K.) Ltd. 100.0 England Dresser-Rand A/S 100.0 Norway Dresser-Rand B.V. 100.0 Netherlands Dresser-Rand Canada, Inc. 51.0 Canada 21-3 Exhibit 21 HALLIBURTON COMPANY SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 1998 STATE OR OWNERSHIP COUNTRY OF NAME OF COMPANY PERCENTAGE INCORPORATION Dresser-Rand Company (Partnership) 51.0 New York Dresser-Rand Compression Services, S.A. 100.0 Switzerland Dresser-Rand de Venezuela S.A. 100.0 Venezuela Dresser-Rand GmbH 100.0 Germany Dresser-Rand Holding Company 100.0 Delaware Dresser-Rand International B.V. 100.0 Netherlands Dresser-Rand Italia S.r.L. 100.0 Italy Dresser-Rand Japan Ltd. 100.0 Japan Dresser-Rand Overseas Sales Company 100.0 Delaware Dresser-Rand Power, Inc. 100.0 Delaware Dresser-Rand S.A. 100.0 France Dresser-Rand Sales Company, S.A. 100.0 Switzerland Dresser-Rand Services B.V. 100.0 Netherlands DRSS Company (Partnership) 100.0 New York European Marine Contractors Limited 50.0 United Kingdom Fann Instrument Company 100.0 Delaware G&H Management Company 100.0 Delaware GAZDMD Avtomatika 100.0 Russia GeoGraphix, Inc. 100.0 Colorado Granherne (Holdings) Ltd. 100.0 England Granherne Information Systems Limited 100.0 England Granherne International (Holdings) Ltd. 100.0 England Granherne International Limited 100.0 England Granherne Limited 100.0 England Grove Foreign Sales Corporation 100.0 Barbados Halliburton (Proprietary) Limited 100.0 South Africa Halliburton A/S 100.0 Norway Halliburton Affiliates Corporation 100.0 Delaware Halliburton Argentina SA 100.0 Argentina Halliburton Australia Pty. Ltd. 100.0 Australia Halliburton BV 100.0 Netherlands Halliburton Canada Inc. 100.0 Canada Halliburton Company Germany GmbH 100.0 Germany Halliburton de Mexico, SA de CV 100.0 Mexico Halliburton Delaware, Inc. 100.0 Delaware Halliburton Denmark A/S 100.0 Denmark Halliburton Energy Services Nigeria Limited 80.0 Nigeria Halliburton Energy Services, Inc. 100.0 Delaware Halliburton Equipment Company SAE 75.0 Egypt 21-4 Exhibit 21 HALLIBURTON COMPANY SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 1998 STATE OR OWNERSHIP COUNTRY OF NAME OF COMPANY PERCENTAGE INCORPORATION Halliburton Global, Ltd. 100.0 Cayman Islands Halliburton Holdings Limited 100.0 United Kingdom Halliburton Holdings, Inc. 100.0 Delaware Halliburton International, Inc. 100.0 Delaware Halliburton Italiana SpA 100.0 Italy Halliburton Latin America SA 100.0 Panama Halliburton Limited 100.0 United Kingdom Halliburton Manufacturing and Services Limited 100.0 United Kingdom Halliburton Norway, Inc. 100.0 Delaware Halliburton NUS Corporation 100.0 Delaware Halliburton Offshore Services, Inc. 100.0 Delaware Halliburton Overseas Limited 100.0 Cayman Islands Halliburton Products & Services Limited 100.0 Cayman Islands Halliburton SAS 100.0 France Halliburton Servicos Ltda. 100.0 Brazil Halliburton Singapore Pte. Ltd. 100.0 Singapore Halliburton Trinidad Limited 100.0 Trinidad Halliburton West Africa Ltd. 100.0 Delaware Halliburton Worldwide Limited 100.0 Cayman Islands HBR Energy, Inc. 100.0 Delaware Howard Humphreys & Partners Limited 100.0 United Kingdom Howard Humphreys Group Limited 100.0 United Kingdom Hunting-Brae Limited 31.0 United Kingdom Intercontinental Services Limited 100.0 Virgin Islands International Administrative Services, Ltd. 100.0 Cayman Islands K.R.S.A. Limited 100.0 England KCI Constructors, Inc. 100.0 Delaware Kellogg (Malaysia) Sdn. Bhd. 100.0 Malaysia Kellogg Algeria, Inc. 100.0 Delaware Kellogg Cardon, C.A. 100.0 Venezuela Kellogg China, Inc. 100.0 Delaware Kellogg Construction Limited 100.0 England Kellogg Development Corporation 100.0 Delaware Kellogg Far East, Inc. 100.0 Delaware Kellogg Foreign Sales Corporation 100.0 Barbados Kellogg Holland B.V. 100.0 Netherlands Kellogg India Limited 100.0 Delaware Kellogg Indonesia, Inc. 100.0 Delaware Kellogg International Corporation 100.0 Delaware 21-5 Exhibit 21 HALLIBURTON COMPANY SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 1998 STATE OR OWNERSHIP COUNTRY OF NAME OF COMPANY PERCENTAGE INCORPORATION Kellogg International Services Corporation 100.0 Delaware Kellogg International Services Limited 100.0 Cayman Islands Kellogg Iran, Inc. 100.0 Delaware Kellogg ISL Limited 100.0 Cayman Islands Kellogg Italy, Inc. 100.0 Delaware Kellogg Korea, Inc. 100.0 Delaware Kellogg Malaysia, Inc. 100.0 Delaware Kellogg Mexico, Inc. 100.0 Delaware Kellogg Middle East Limited 100.0 Delaware Kellogg Middle East Services, Inc. 100.0 Delaware Kellogg Nigeria, Inc. 100.0 Delaware Kellogg Offshore Limited 100.0 England Kellogg Overseas Construction Corporation 100.0 Delaware Kellogg Overseas Corporation 100.0 Delaware Kellogg Overseas Services Corporation 100.0 Panama Kellogg Pan American Corporation 100.0 Delaware Kellogg Pan American, C.A. 100.0 Venezuela Kellogg Plant Services Limited 100.0 England Kellogg Plant Services, Inc. 100.0 Delaware Kellogg Rust Services, Inc. 100.0 Delaware Kellogg Rust Synfuels, Inc. 100.0 Delaware Kellogg Saudi Arabia Limited 100.0 Delaware Kellogg Services, Inc. 100.0 Delaware KESA Limited 100.0 England Kinhill Holdings Pty. Ltd. 100.0 Australia KPA, S.A. de C.V. 100.0 Mexico KRW Energy Systems, Inc. 80.0 Delaware Kuwait Kellogg Ltd. 100.0 Delaware Landmark America Latina, SA 100.0 Delaware Landmark EAME, Limited 100.0 United Kingdom Landmark Graphics Corporation 100.0 Delaware Landmark Graphics Europe/Africa, Inc. 100.0 Delaware Landmark Graphics International, Inc. 100.0 Texas Landmark Sales Corporation 100.0 Barbados Laurel Financial Services BV 100.0 Netherlands M. W. Kellogg Company Limited 100.0 Canada M. W. Kellogg Constructors, Inc. 100.0 Delaware M. W. Kellogg Holdings, Inc. 100.0 Delaware M. W. Kellogg Technology Company 100.0 Delaware 21-6 Exhibit 21 HALLIBURTON COMPANY SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 1998 STATE OR OWNERSHIP COUNTRY OF NAME OF COMPANY PERCENTAGE INCORPORATION M. W. Kellogg-Delaware, Inc. 100.0 Delaware M.W. Kellogg (Eastern Hemisphere) Limited 100.0 England M.W. Kellogg (Pensions) Limited_ 100.0 England M.W. Kellogg Group Limited 100.0 England M.W. Kellogg International Limited 100.0 England M.W. Kellogg Limited 100.0 England Malaysian Barite Sdn. Bhd. 100.0 Malaysia Management Logistics, Inc. 100.0 Delaware Masoneilan (S.E.A.) Private Limited 100.0 Singapore Masoneilan HP + HP GmbH 100.0 Germany Masoneilan Interacional, S.A. de C.V. 100.0 Mexico Masoneilan International, Inc. 100.0 Delaware Masoneilan S.A. 100.0 Spain Middle East Technologies, Inc. 100.0 Delaware MIHC, Inc. 100.0 Delaware Mono Group 100.0 Scotland Mono Pumps (Australia) Pty. Limited 100.0 Australia Mono Pumps (Manufacturing) Limited 100.0 England Mono Pumps Limited 100.0 England Monoflo, Inc. 100.0 Delaware MWKL Field Services Limited 100.0 Cayman Islands MWKL Middle East Limited 100.0 England NMR Corporation 100.0 Delaware Norsk Modifikajon og Vedikehold Service AS 100.0 Norway North Sea Assets Limited 100.0 Scotland NUMAR Corporation 100.0 Pennsylvania NUMAR Oilfield Services, Inc. 100.0 Pennsylvania OGC International 100.0 United Kingdom Overseas Marine Leasing Company 100.0 Delaware Petroleum Information & Equipment Services Pte. Ltd. 100.0 Singapore Property and Casualty Insurance Ltd. - U.S. 100.0 Vermont Property and Casualty Insurance, Limited 100.0 Bermuda PT Gema Sembrown 45.0 Indonesia PT Halliburton Drilling Systems Indonesia 80.0 Indonesia PT Halliburton Indonesia 80.0 Indonesia PT Halliburton Logging Services Indonesia 80.0 Indonesia Pullman Incorporated Capital Corporation 100.0 Delaware Pullman Kellogg Plant Services Algeria, Inc. 100.0 Delaware 21-7 Exhibit 21 HALLIBURTON COMPANY SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 1998 STATE OR OWNERSHIP COUNTRY OF NAME OF COMPANY PERCENTAGE INCORPORATION Quimicas do Brazil Limitada 100.0 Brazil Rockwater Holdings Limited 100.0 United Kingdom Rockwater Limited 100.0 United Kingdom Rockwater Offshore Contractors 2 BV 100.0 Netherlands Rockwater, Inc. 100.0 Delaware Seaforth Maritime Limited 100.0 United Kingdom Security DBS B.V. 100.0 Netherlands Servicios Halliburton de Venezuela, SA 100.0 Delaware Societe Kellogg 100.0 Delaware Southwest Industries, Inc. 100.0 Delaware Sperry-Sun (U.K.) Limited 100.0 England Sperry-Sun International, Inc. 100.0 Delaware Sperry-Sun Saudia Company Limited 75.0 (3) Saudi Arabia Studebaker-Worthngton (U.K.) Limited 100.0 England Sub Sea International, Inc. 100.0 Delaware Sub Sea Offshore (Holdings) Limited 100.0 England Sub Sea Offshore Limited 100.0 England Sub Sea Offshore Pte. Ltd. 100.0 Singapore Symington Wayne Overseas, Ltd. 100.0 Canada T. K. Valve Holdings 100.0 England The M. W. Kellogg Company 100.0 Delaware TK Valve Limited 100.0 England TSKJ Nigeria, Limited 100.0 Nigeria Turbodyne Electric Power Corporation 100.0 Delaware Wellstream International, Inc. 100.0 Delaware Wellstream, Inc. 100.0 Delaware Wheatley Pump Incorporated 100.0 Delaware Worthington-Simpson Ltd. 100.0 England <FN> (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) The names of approximately 270 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). (3) Shares held in trust by NL Industries, Inc. </FN> 21-8