List of oilfield service companies

This is a list of oilfield service companies – which provide services to the petroleum exploration and production industry but do not typically produce petroleum. In the list, notable subsidiary companies and divisions are listed as sub-lists of their current parent companies.

Oilfield service companies may produce, maintain, and repair equipment used in oil extraction and oil transportation.^[1] In 2019, the global oilfield services market was US $ 267.8 billion.^[2]

• List of oil exploration and production companies
• List of largest oil and gas companies by revenue