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Patterson-UTI Energy is one of the largest land rig drilling contractors in the United States. Its 2023 merger with NexTier greatly expanded its pressure pumping operations, as well, and the firm now controls nearly 20% of the North American market for drilling and completions services. It also provides directional drilling services and tool rental services in most US onshore oil and gas basins.

Core Laboratories is the premier provider of reservoir description and production enhancement services for oil and gas exploration and production. It provides data and analytics to aid well operators in determining optimal methods for recovering, processing, and refining hydrocarbons from a well. It also manufactures the associated lab equipment for its services.

Liberty Energy is an oilfield services company that provides hydraulic fracturing services—mainly pressure pumping—in major basins throughout North America. Its 2020 acquisition of Schlumberger’s OneStim business segment made Liberty one of the largest pressure pumpers in North America. It also added wireline operations, two Permian frac sand mines, and an expanded technological portfolio.

Expro Group offers products and services that span the well life cycle, including well construction, well flow management, well intervention and integrity, and subsea well access. It maintains operations around the world and specializes in offshore production solutions, capabilities enhanced by the 2021 merger with Frank’s International. It also provides production optimization for both onshore and offshore applications. The majority of its business relies on international and offshore markets, representing about 80% and 70% of annual revenue, respectively.