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Core Laboratories Inc. provides reservoir description and production enhancement services and products to the oil and gas industry in the United States, and internationally. It operates through Reservoir Description and Production Enhancement segments. The Reservoir Description segment includes the characterization of petroleum reservoir rock and reservoir fluid samples to enhance production and improve recovery of crude oil and gas from its clients' reservoirs. It offers laboratory-based analytical and field services to characterize properties of crude oil and oil delivered products; and proprietary and joint industry studies, as well as services that support carbon capture, utilization and storage, geothermal projects, and the evaluation and appraisal of mining activities. The Production Enhancement segment provides services and products relating to reservoir well completions, perforations, stimulations, production, and well abandonment. It offers integrated diagnostic services to evaluate and monitor the effectiveness of well completions and to develop solutions to improve the effectiveness of enhanced oil recovery projects. The company markets and sells its products through a combination of sales representatives, technical seminars, trade shows, and print advertising, as well as through distributors. Core Laboratories Inc. was founded in 1936 and is based in Houston, Texas.

Helix Energy Solutions Group, Inc., together with its subsidiaries, an offshore energy services company, provides specialty services to the offshore energy industry in Brazil, the Gulf of Mexico, the East Coast of the United States, North Sea, the Asia Pacific, and West Africa regions. The company operates through four segments: Well Intervention, Robotics, Production Facilities, and Shallow Water Abandonment segments. It engages in the installation of flowlines, control umbilicals, and manifold assemblies and risers; trenching and burial of pipelines; installation and tie-in of riser and manifold assembly; commissioning, testing, and inspection activities; and provision of cable and umbilical lay, and connection services. The company also provides well intervention, intervention engineering, and production enhancement services; coiled tubing operations; inspection, repair, and maintenance of production structures, trees, jumpers, risers, pipelines, and subsea equipment; and related support services. In addition, it offers reclamation and remediation services; well plug and abandonment services; pipeline, cable and umbilical abandonment services; and site inspections. Additionally, the company offers oil and natural gas processing facilities and services; and fast response system, as well as site clearance and subsea support services. Further, it provides offshore oilfield decommissioning and reclamation, project management, engineered solutions, intervention, maintenance, repair, heavy lift, and commercial diving services. It serves independent oil and gas producers and suppliers, pipeline transmission companies, renewable energy companies, and offshore engineering and construction firms. The company was formerly known as Cal Dive International, Inc. and changed its name to Helix Energy Solutions Group, Inc. in March 2006. Helix Energy Solutions Group, Inc. was incorporated in 1979 and is headquartered in Houston, Texas.

Liberty Energy Inc. provides hydraulic services and related technologies to onshore oil and natural gas exploration, and production companies in North America. The company offers hydraulic fracturing services, including complementary services, such as wireline services, proppant delivery solutions, field gas processing and treating, compressed natural gas (CNG) delivery, data analytics, related goods comprising sand mine operations, and technologies; and well site fueling and logistics. As of as of December 31, 2023, the company owned and operated a fleet of approximately 40 active hydraulic fracturing; and two sand mines in the Permian Basin. In addition, the company provides services primarily in the Permian Basin, the Williston Basin, the Eagle Ford Shale, the Haynesville Shale, the Appalachian Basin (Marcellus Shale and Utica Shale), the Western Canadian Sedimentary Basin, the Denver-Julesburg Basin (the DJ Basin), and the Anadarko Basin. Liberty Energy Inc. was formerly known as Liberty Oilfield Services Inc. and changed its name to Liberty Energy Inc. in April 2022. The company was founded in 2011 and is headquartered in Denver, Colorado.

National Energy Services Reunited Corp. provides oilfield services to oil and gas companies in the Middle East, North Africa, and internationally. The company's Production Services segment offers hydraulic fracturing services; coiled tubing services, including nitrogen lifting, fishing, milling, clean-out, scale removal, and other well applications; stimulation and pumping services; primary and remedial cementing services; nitrogen services; filtration services, as well as frac tanks and pumping units; and pipeline and industrial services, such as water filling and hydro testing, nitrogen purging, and de-gassing and pressure testing, as well as cutting/welding and cooling down piping/vessels systems. This segment also provides production assurance chemicals; integrated project management projects; artificial lift services; and surface and subsurface safety systems, high-pressure packer systems, flow controls, service tools, expandable liner technology, vacuum insulated tubing technology for steam applications, and engineering capabilities with manufacturing capacity and testing facilities, as well as sources and treats water for oil and gas, municipal, and industrial use. Its Drilling and Evaluation Services segment offers drilling and workover rigs; rigs and integrated services; fishing and remediation solutions; directional and turbines drilling; drilling fluid systems and related technologies; wireline logging; slickline services for removal of scale, wax and sand build-up, setting plugs, changing out gas lift valves, and fishing and other well applications; and well testing services to measure solids, gas, and oil and water produced from well, as well as rents drilling tools. This segment also provides oilfield solutions for thru-tubing intervention; tubular running services; and a range of wellhead products, flow control equipment, and frac equipment. National Energy Services Reunited Corp. was incorporated in 2017 and is headquartered in Houston, Texas.

RPC, Inc., through its subsidiaries, engages provision of a range of oilfield services and equipment for the oil and gas companies involved in the exploration, production, and development of oil and gas properties. The company operates through Technical Services and Support Services segments. The Technical Services segment offers pressure pumping, fracturing, acidizing, cementing, downhole tools, coiled tubing, snubbing, nitrogen, well control, wireline, pump down, and fishing services that are used in the completion, production, and maintenance of oil and gas wells. The Support Services segment provides a range of rental tools for onshore and offshore oil and gas well drilling, completion, and workover activities. This segment also offers oilfield pipe inspection, and pipe management and storage services, as well as well control training and consulting services. It operates in the United States, Africa, Canada, Argentina, China, Mexico, Latin America, the Middle East, and internationally. The company was incorporated in 1984 and is headquartered in Atlanta, Georgia.