List
- ABB Group
- Abbot Group
- Acteon
- Aibel
- Aker Solutions
- Baker Hughes
- BGR Energy Systems
- Calfrac Well Services
- Canary, LLC (formerly Frontier Energy Group)
- CGG
- Challenger Limited
- Champion X
- China Oilfield Services
- Clough Group
- Core Laboratories
- Cyntech
- DCP Midstream Partners
- Diamond Offshore Drilling
- DOF Subsea
- Engineers India
- ESG Solutions
- Eversource Energy
- Expro
- Fairfield Geotechnologies
- Fern Communications
- Flowserve
- Fluor Corporation
- Fugro
- Gaia Earth Sciences
- Geokinetics
- Geophysical Service
- Gibson Energy
- GlobaLogix
- Grant Prideco
- Grup Servicii Petroliere
- Gyrodata
- Halliburton
- Helix Energy Solutions Group
- Helmerich & Payne
- Hill International
- Hunting plc
- Hytera
- ION Geophysical
- J&L Supply Co.
- Jacobs Engineering Group
- Key Energy Services
- Larsen & Toubro
- McDermott International
- MODEC
- Nabors Industries
- Nalco Champion
- National Oilwell Varco
- Neuman & Esser
- Newpark Resources
- Noble Corporation
- Oceaneering International
- Odfjell Drilling
- OneSubsea
- Petrofac
- Petroleum Geo-Services
- PJP4
- Polarcus
- Precision Drilling
- Rosneft
- Saipem
- Sapura Energy
- SBM Offshore
- Schlumberger
- Schoeller-Bleckmann
- Scomi
- Seaboard International
- Seadrill
- Shawcor
- Siemens
- Stewart & Stevenson
- Subsea 7
- Superior Energy Services
- Swire
- TAM International
- TechnipFMC
- Tecnicas Reunidas
- Tracerco
- Transocean
- Trican Well Service
- Trinidad Drilling
- Valaris Limited
- Wasco Energy
- Weatherford International
- Weir Group
- Welltec
- Wood Group
- Worley