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
• APPCO[1]
• Arrow Energy Services[2]
• 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
• [Hawk International Finance & Constructions Co. Ltd.][3]
• BJ Services
• Calfrac Well Services
• Cameron
• Ceca specialty chemicals
• Challenger LTD, Libya
• Champion Technologies
• Clariant
• Clariant Oil Services
• Compagnie Générale de Géophysique
• Cyntech
• Dresser Inc.
• Dynawell GmbH & Co. KG, Germany DW Oilfield
• Engineering Seismology Group (ESG)
• Expro Group
• FMC Technologies
• Fluor Corp.
• First Corp International inc.
• Franklin Well Services, Inc.
• Geokinetics Inc.
• Geophysical Development Corporation (GDC)
• Gly-Tech Services
• Quantum Geophysical
• Geoservices
• Advanced Mud Logging
  • Well Intervention
  • Field Services
• GrantPrideco Inc.
• Guardian Wellhead Protection
• Halliburton
• Integrated Production Services
  • Dresser Industries
• Horizon Well Logging, Inc.
• Hydraulic Rod Pumps, Intl.
• J&L Supply Co.
• 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
• Ocean Flow International LLC.
• OilfieldPros.com Oilfield Company Directory
• Oil Tools International Services Pvt. Ltd. (OTI)
• Nabors Industries (Nabors Production Services)
• Pathfinder Energy Services
• Pathfinder Security Services
• Petroleum Geo-Services (PGS)
• Petrolink - information and communications technology services
• Pioneer Oil Field Services, LLC
• Precision Coatings, Inc.
• Precision Drilling Corporation - drilling rig and oil field equipment
  • United Diamonds - PDC drilling bits
• PSL Energy Services
• Pacific Process Systems (PPS)
• [4]
• PumpReports.com
• Qserv
• Roxar reservoir maximizing
• Sanjel Corporation
• Schlumberger Limited
• Seaboard International
  • Seaboard Wireline
• Smith International
• Superior Well Services
• Stratagraph Inc
• T3 Energy Services
• TecWel
• Tesco Corporation
• Transocean
• Tri-Energy Services
• Trican Well Service Ltd
• Trinidad Energy 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
• Well Ops - Leader in rigless well intervention
• Welltec - wireline tractor supplier
• Well Service of Virginia
• WesternGeco
  • Geco-Prakla
  • Western Geophysical
  • Geophysical Service Incorporated
• Wood Group
• W.W.Wireline