Baker Hughes, Inc. is a private company headquartered in Houston, TX. The firm manufactures oilfield equipment.

welltec GmbH is a German private company located in Osnabr��ck that manufactures water glasses. Peter Liebisch is the current CEO of the firm.

Halliburton Energy Services, Inc. provides oilfield services. It offers technical products and services for petroleum, natural gas exploration and production. The company is headquartered in Houston, TX.

Part of Schlumberger NV, Schlumberger Technologies, Inc. is a company headquartered in Moorestown, NJ, that provides oilfield services such as distributing oil and gas information technologies and providing consulting services.

Stimline AS provides equipment for wire line and coiled tubing interventions. The firm repairs engine, transmission, triplex and quintaplex, centrifugal pumps, hydraulic and pneumatic systems, lifting and overhead machinery and draw works for all stimulation and drilling equipment. It develops modern wire line and coiled tubing equipment for offshore applications. The company was founded by Tom Fedog and Erik Heimar Zachariasen in 2010 and is headquartered in Kristiansand, Norway.

Devin International, Inc. manufactures and provides rental equipment to the oil and gas industry. It offers a large inventory of equipment rental tools such as lift frames, elevator bails, crossover subs and safety valves. The company was founded in 1979 and is headquartered in Lafayette, LA.

Weatherford Technology Holdings LLC engages in the provision of scientific and technological services. The company is headquartered in Houston, TX.

Part of Exxon Mobil Corp., Exxonmobil Upstream Research Co. is a company headquartered in Houston, TX, that engages in exploration of oil and gas.

Schlumberger Technology BV, a subsidiary of Schlumberger NV, is a Dutch company located in The Hague. The firm provides gas and oil exploration services.

Services Petroliers Schlumberger SA provides engineering services. The company was founded on September 30, 1954 and is headquartered in Paris, France.

Helix Energy Solutions Group, Inc. is an international offshore energy company. It focuses on subsea construction, maintenance and salvage services to the offshore natural gas and oil industry. The firm also provides specialty services to the offshore energy industry, with a focus on well intervention and robotics operations. The company operates through the following business segments: Well Intervention, Robotics and Production Facilities. The Well Intervention segment offers vessels and related equipment that are used to perform well intervention services primarily in the Gulf of Mexico and North Sea regions. The Robotics segment involves four chartered vessels and also includes ROVs, trenchers and ROVDrills designed to complement offshore construction and well intervention services. The Production Facilities segment includes its investment in the Helix Producer I and Kommandor LLC. The company was founded in 1979 and is headquartered in Houston, TX.

FMC Kongsberg Subsea AS supplies subsea and platform-based design systems. It provides control and monitoring systems and other equipment to offshore or land-based activities. The firm also engages in the construction of oil platforms and modules. The company was founded on September 5, 2003 and is headquartered in Kongsberg, Norway.

Quality Intervention AS operates, repairs, trades, and leases equipment and machineries to the oil industry. The company was founded by Jostein Alværn and Bjarne Langeteig in 2008 and is headquartered in Balestrand, Norway.

Part of Weatherford International plc, Weatherford/Lamb, Inc. is a company headquartered in Houston, TX, that engages in oil and gas extraction services.

CapWell AS engages in the provision of oilfield equipment. Its products include open platform, optical logging, tension head, and capline rope. The company was founded in 2011 and is headquartered in Sandnes, Norway.