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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.

Public Joint Stock Company Gazprom Neft, an integrated oil company, engages in the exploration, development, production, and sale of crude oil and gas in Russia, the CIS countries, and internationally. The company operates in two segments, Upstream and Downstream. It holds interests in approximately 104 license blocks in Russia; and projects in Angola, Belarus, Bulgaria, Iraq, Italy, Kazakhstan, Tajikistan, Kyrgyzstan, Latvia, Estonia, Bosnia and Herzegovina, Hungary, Romania, Serbia, and Venezuela. As of December 31, 2020, the company had total proved and probable hydrocarbons reserves of 3.9 billion tons of oil equivalent. Public Joint Stock Company Gazprom Neft is also involved in the production, distribution, and marketing of refined petroleum products. In addition, it produces and sells motor and jet fuels, lubricants, bitumen products, and petrochemical products, as well as provides bunkering services. The company also distributes and markets its fuel through 1,870 filling stations. The company was incorporated in 1995 and is based in St. Petersburg, Russia. Public Joint Stock Company Gazprom Neft is a subsidiary of PJSC Gazprom.

Halliburton Company provides products and services to the energy industry worldwide. It operates through two segments, Completion and Production, and Drilling and Evaluation. The Completion and Production segment offers production enhancement services that include stimulation and sand control services; cementing services, such as well bonding and casing, and casing equipment; and completion tools that offer downhole solutions and services, including well completion products and services, intelligent well completions, and service tools, as well as liner hanger, sand control, and multilateral systems. This segment also provides electrical submersible pumps, as well as artificial lift services; production solutions comprising coiled tubing, hydraulic workover units, downhole tools, and pumping and nitrogen services; pipeline and process services, such as pre-commissioning, commissioning, maintenance, and decommissioning; and specialty chemicals and services. The Drilling and Evaluation segment offers drilling fluid systems, performance additives, completion fluids, solids control, specialized testing equipment, and waste management services; drilling systems and services; wireline and perforating services consists of open-hole logging, and cased-hole and slickline; and drill bits and services comprising roller cone rock bits, fixed cutter bits, hole enlargement, and related downhole tools and services, as well as coring equipment and services. This segment also provides cloud based digital services and artificial intelligence solutions on an open architecture for subsurface insights, integrated well construction, and reservoir and production management; testing and subsea services, such as acquisition and analysis of reservoir information and optimization solutions; and project management and integrated asset management services. Halliburton Company was founded in 1919 and is based in Houston, Texas.

Oceaneering International, Inc. provides engineered services and products, and robotic solutions to the offshore energy, defense, aerospace, manufacturing, and entertainment industries worldwide. It operates through Subsea Robotics, Manufactured Products, Offshore Projects Group, Integrity Management & Digital Solutions, and Aerospace and Defense Technologies segments. The company offers remotely operated vehicles (ROVs) for drill support and vessel-based services, including subsea hardware installation, construction, pipeline inspection, survey and facilities inspection, maintenance, and repair; ROV tooling; and survey services, such as hydrographic survey, positioning services, and autonomous underwater vehicles for geoscience. It also provides distribution and connection systems, including production control umbilicals and field development hardware, pipeline connection, and repair systems to the energy industry; and autonomous mobile robotic technology and entertainment systems to various industries. In addition, the company offers subsea installation and intervention, including riserless light well intervention inspection, maintenance, and repair services; installation and workover control systems, and ROV workover control systems; diving services; project management and engineering; and drill pipe riser services and systems, and wellhead load relief solutions. Further, it provides asset integrity management, software and analytical solutions for the bulk cargo maritime industry, and software, digital, and connectivity solutions for the energy industry, as well as government services and products, including engineering and related manufacturing in defense and space exploration activities to the United States' government agencies and their prime contractors. Oceaneering International, Inc. was founded in 1964 and is headquartered in Houston, Texas.

Subsea 7 S.A. delivers offshore projects and services for the energy industry worldwide. It provides subsea field development products and services, including project management, design and engineering, procurement, fabrication, survey, installation, and commissioning of production facilities on the seabed and the tie-back of its facilities to fixed or floating platforms or to the shore. The company also offers engineering, procurement, commissioning, and installation of subsea umbilicals, risers, and flowlines; inspection, repair, maintenance, remote intervention, and integrity management of subsea infrastructure services; conventional services comprising fabrication, installation, extension, and refurbishment of fixed and floating platforms and associated pipelines in shallow water; and hook-up services. In addition, it operates heavy lifting operations and heavy transportation services for renewables structures; and installs offshore wind turbine foundations, as well as engages in the decommissioning of redundant offshore structures. Further, the company provides remotely operated vehicles (ROVs) and tooling services to support exploration and production activities, as well as engineering and advisory services for customers in the oil and gas, renewables, and utilities industries. The company was incorporated in 1993 and is based in Luxembourg City, Luxembourg.