This is alist of oilfield service companies – which provide services to thepetroleum exploration andproduction 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]
