LIST OF OILFIELD SERVICE COMPANIES

The 'list of oilfield service companies' includes companies that provide services to the petroleum exploration and production industry but that do not typically produce petroleum themselves. Given the many mergers and acquisitions that have occurred in this sector, acquired companies are listed as sub-lists of their (current) parent companies, as nearly as can be determined.

★ Aker Kvaerner

★ Baker Hughes

★ Baker International

★ Hughes Tool Company

★ Western Atlas (renamed to ''Baker Atlas'') - well logging and data analyses

★ Baker Hughes Inteq - diversified drilling solutions

★ Benoit Machine

★ BJ Services

★ Calfrac Well Services

★ Cameron

★ Ceca specialty chemicals

★ Champion Technologies

★ Clariant

★ Clariant Oil Services

★ Compagnie Générale de Géophysique

★ Cyntech

★ Dresser Inc.

★ Engineering Seismology Group (ESG)

★ Expro Group

★ Fluor Corp.

★ First Corp International inc.

★ Geokinetics Inc.

★ Geophysical Development Corporation (GDC)

★ Gly-Tech Services

★ Quantum Geophysical

★ Geoservices

★ Advanced Mud Logging

★
★ Well Intervention

★
★ Field Services

★ Halliburton

★ Integrated Production Services

★
★ Dresser Industries

★ Horizon Well Logging, Inc.

★ Hydraulic Rod Pumps, Intl.

★ J-W Operating Company - Energy Services

★
★ J-W Power Company - Natural Gas Compression

★
★ J-W Wireline Company - Cased-hole Wireline Services

★
★ J-W Measurement Company - Natural Gas Measurement and Supplies

★
★ J-W Gathering Company - Natural Gas Gathering and Transmission

★
★ J-W Custom Manufacturing Company - Oilfield Equipment Manufacturing

★ Kodiak Coil Tubing

★ OilfieldPros.com Oilfield Company Directory

★ Pathfinder Security Services

★ Petroleum Geo-Services (PGS)

★ Precision Coatings, Inc.

★ Precision Drilling Corporation - drilling rig and oil field equipment

★
★ United Diamonds - PDC drilling bits

★ PSL Energy Services

★ Pacific Process Systems (PPS)

★ [1]

★ Qserv

★ Sanjel Corporation

★ Schlumberger Limited

★ Seaboard International

★
★ Seaboard Wireline

★ Smith International

★ Superior Well Services

★ T3 Energy Services

★ Transocean

★ Tri-Energy Services

★ Trican Well Services

★ National Oilwell Varco

★
★ Varco

★
★ Varco Tuboscope

★ Veco Corp

★ Weatherford

★
★ Precision Energy

★
★ Computalog Ltd - MWD and wireline logging

★
★ Reeves Wireline - wireline and pipe conveyed logging

★ Welltec - wireline tractor supplier

★ Well Service of Virginia

★ WesternGeco

★
★ Geco-Prakla

★
★ Western Geophysical

★
★ Geophysical Service Incorporated

★ W.W.Wireline