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Schlumberger is among the largest oil equipment and service providers in the world based on the number of employees. As of 2025, the U.S. oilfield service company employed ** people. By comparison, fellow U.S.-based competitor Baker Hughes had a workforce roughly half that size.

Energy Transfer - largest company by revenue

While employment numbers provide insight into company scale, revenue figures offer a different perspective on industry leadership. Energy Transfer, a U.S.-based company, generated revenues of billion U.S. dollars by August 2025, based on a rolling 12-month period. This positions Energy Transfer as one of the largest oil equipment and service providers worldwide, showcasing the diverse nature of industry leadership across different metrics. The company's extensive pipeline infrastructure, responsible for transporting roughly ** percent of all natural gas and crude oil across the United States, underscores its significant market presence.

Offshore drilling and industry trends

The oil equipment and services sector extends beyond land-based operations, with offshore drilling playing a crucial role. Transocean Ltd, the largest offshore drilling contractor globally, reported revenues of *** billion U.S. dollars in 2024. The industry has seen a shift towards mobile rigs in recent years, offering more flexibility in operations. As of 2024, the global offshore oil rig count stood at 213 units, significantly lower than the more than 1,400 land-based oil rigs. This disparity highlights the continued dominance of onshore drilling activities in the global oil and gas industry.