Davis Larssen

Proserv Group, Inc. manufactures production equipment for the oil and gas industry. The firm offers drilling and production technology products, including control systems, regulators, and fluid sampling technology systems; check, relief, shuttle, SPM, directional control, and instrumentation valves; and chemical injection equipment, systems, panels, and skids. It also provides subsea control systems, installation and intervention control systems, and subsea dredging and sampling systems; and BOP stack and tree refurbishment, assembly, FAT, and SIT solutions for subsea and offshore renewable markets. The company was founded in 1974 and is headquartered in Westhill, the United Kingdom.

Vetco Gray, Inc. provides oil and gas drilling equipment. It offers equipment and services for onshore and offshore drilling and production, single well onshore drilling projects, multiple well deep water facilities, and subsea production systems. The company was founded on February 5, 1986 and is headquartered in Dallas, TX.

Part of SLB NV, Schlumberger Plc is a British technology company that specializes in oilfield services. The company is based in Horley, UK. The company provides effective fracturing services to help connect wellbores to more reservoir rock. Founded in 1977, the company achieves accurate depth control and ensures target zone coverage while controlling hydrostatic balance.

Bateman Litwin NV supplies technology, engineering, procurement and project management services to world's oil and gas, power, renewable energy, minerals, phosphate and solvent extraction dependent industries. The Group operates under three industry-recognized brands which, include Bateman, Litwin and Delta-T. It was founded in 1919 and is headquartered in Amsterdam, Netherlands.

Gilmore Valve Co. designs and manufactures hydraulic valves. It offers check, relief, shuttle, SPM, control, dirty fluid, pilot, solenoid, trigger, 4-way pilot, dump, cartridge, miscellaneous valves and regulators. The company was founded by Sam E. Gilmore in 1969 and is headquartered in Houston, TX.

KRG Industries Ltd. provides subcontract engineering services. The company was founded in 1983 and is headquartered in Aberdeen, the United Kingdom.

Proserv (1) Ltd. is a holding company, which engages in investment purposes. The company was founded on February 11, 2010 and is headquartered in Aberdeen, the United Kingdom.

Proserv UK Ltd. provides and develops technology solutions to drilling, decommissioning, and offshore wind markets. It offers drilling controls, production controls, subsea controls, field technology services, and renewable services. The company was founded on December 20, 1989 and is headquartered in Aberdeen, the United Kingdom.

Part of Proserv Holdings, Inc., Proserv Holdings Ltd. provides investment and financing activities. The company is based in Aberdeen, UK. Founded in 2012.