Jan van Gaalen

Part of SLB NV, Schlumberger Plc is a British technology company that specializes in oilfield services. The private 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.

Vale Ltd. engages in the mining, processing, and marketing of nickel. The firm produces nickel, copper, cobalt, platinum, rhodium, ruthenium, iridium, gold, and silver. The company was founded in 1901 and is headquartered in Toronto, Canada.

C&J Energy Services, Inc. engages in the provision of on-shore well construction, well completions, and well services to the oil and gas industry. It also offers manufacturing, research, and technology services to oil and gas production companies. It operates through the following segments: Completion Services, and Well Support Services. The Completion Service segment engages in hydraulic fracturing and cased-hole wireline and pump down services. The Well Support Services segment focuses on post-completion activities at the well site, and includes rig services, including workover, plugging and abandonment, fluids management, coiled tubing, artificial lift applications, and other specialized well site services. The company was founded by Joshua E. Comstock in 1997 and is headquartered in Houston, TX.

NexTier Oilfield Solutions, Inc.is an oilfield service company. It offers completion solutions, hydraulic fracturing, wire line, pump down, coiled tubing, cementing, rig services, special services, and fluids management services. The company operates through the following segments: Completion Services, Well Construction and Intervention Services, and Well Support Services. The Completion Services segment consists of fracturing services, wireline and pumping services, and completion support services, which includes the research and technology (R&T) department. The Well Construction and Intervention Services segment consists of cementing services and coiled tubing services. The Well Support Services segment consists of rig services, fluids management services, and specialty well site services. The company was founded on October 13, 2016 and is headquartered in Houston, TX.