Noble Corporation plc operates as an offshore drilling contractor for the oil and gas industry worldwide. The company provides contract drilling services to the oil and gas industry through its fleet of mobile offshore drilling units. It operates drilling rigs, such as floaters and jackups. Noble Corporation plc was founded in 1921 and is headquartered in Sugar Land, Texas.

Valaris Limited, together with its subsidiaries, provides offshore contract drilling services Gulf of Mexico, South America, North Sea, the Middle East, Africa, and the Asia Pacific. The company operates through four segments: Floaters, Jackups, ARO, and Other. It owns an offshore drilling rig fleet, which include drillships, dynamically positioned semisubmersible rigs, moored semisubmersible rig, and jackup rigs. It serves international, government-owned, and independent oil and gas. Valaris Limited was founded in 1975 and is based in Hamilton, Bermuda.

Patterson-UTI Energy, Inc., through its subsidiaries, engages in the provision of contract drilling services to oil and natural gas operators in the United States and internationally. It operates through three segments: Drilling Services, Completion Services, and Drilling Products. The Contract Drilling Services segment provides contract and directional drilling services in onshore oil and natural gas basins, as well as engages in the service and re-certification of equipment for drilling contractors, and provision of electrical controls and automation to the energy, marine and mining industries. The Completion Services segment offers services for hydraulic fracturing, wireline and pumping, completion support, and cementing; and involved in the power solutions natural gas fueling, and logistics and storage businesses. The Drilling Products segment manufactures and distributes drill bits for energy and mining markets. It also provides software and services, such as MWD Survey FDIR, a data analytics technology to analyze MWD survey data in real-time and identify the position of a well; HiFi Nav, which enhances FDIR by targeting improved vertical placement of the directional well within the reservoir; HiFi Guidance, utilizes trajectory optimization to determine optimal steering recommendations and placement within the reservoir; and rents oilfield tools. The company was founded in 1978 and is headquartered in Houston, Texas.

Tidewater Inc., together with its subsidiaries, provides offshore support vessels and marine support services to the offshore energy industry through the operation of a fleet of marine service vessels worldwide. It provides services in support of offshore oil and gas exploration, field development, and production, as well as windfarm development and maintenance, including towing of and anchor handling for mobile offshore drilling units; transporting supplies and personnel necessary to sustain drilling, workover, and production activities; offshore construction, and seismic and subsea support; geotechnical survey support for windfarm construction; and various specialized services, such as pipe and cable laying. The company operates anchor handling towing supply vessels, platform supply vessels, crew boats, utility vessels, and offshore tugs. The company serves integrated and independent oil and gas exploration, field development, and production companies; mid-sized and smaller independent exploration and production companies; foreign government-owned or government-controlled organizations, and other related companies; offshore drilling contractors; and other companies, such as offshore construction, windfarm development, diving, and well stimulation companies. Tidewater Inc. was incorporated in 1956 and is headquartered in Houston, Texas.

Transocean Ltd., together with its subsidiaries, provides offshore contract drilling services for oil and gas wells worldwide. It contracts mobile offshore drilling rigs, related equipment, and work crews to drill oil and gas wells. The company operates a fleet of mobile offshore drilling units, consisting of ultra-deepwater floaters and harsh environment floaters. It serves integrated energy companies, government-owned or government-controlled energy companies, and other independent energy companies. The company was founded in 1926 and is based in Steinhausen, Switzerland.

Seadrill Limited provides offshore contract drilling services to the oil and gas industry worldwide. The company owns and operates drill ships, semi-submersible rigs, and jack-up rigs for operations in shallow and ultra-deep-water in benign and harsh environments. It serves oil super-majors, state-owned national oil companies, and independent oil and gas companies. Seadrill Limited was formerly known as Seadrill 2021 Limited. The company was founded in 2005 and is based in Hamilton, Bermuda.

SEACOR Marine Holdings Inc. provides marine and support transportation services to offshore oil, natural gas, and windfarm facilities worldwide. Its offshore support and specialty vessels deliver cargo and personnel to offshore installations, including offshore wind farms; handle anchors and mooring equipment for offshore rigs and platforms; assist offshore operations for production and storage facilities; provide construction, well work-over, and offshore wind farm installation and decommissioning support; and carry and launch equipment used underwater in drilling and well installation, maintenance, inspection, and repair, as well as offer accommodations for technicians and specialists, safety support, and emergency response services. As of December 31, 2023, the company operated a fleet of 58 support vessels, of which 55 were owned or leased-in, and three were managed on behalf of unaffiliated third parties. It serves integrated national and international oil companies, independent oil and natural gas exploration and production companies, and oil field service and construction companies, as well as offshore wind farm operators and offshore wind farm installation and maintenance companies. SEACOR Marine Holdings Inc. was founded in 1989 and is headquartered in Houston, Texas.

Independence Contract Drilling, Inc. provides land-based contract drilling services for oil and natural gas producers in the United States. It operates a fleet of pad-optimal and superspec AC powered rigs in the Permian Basin and the Haynesville Shale. The company was incorporated in 2011 and is headquartered in Houston, Texas.