Ranger Energy Services Inc is a provider of onshore high-specification (high-spec) well service rigs, wireline services, and additional processing solutions and ancillary services in the United States. It offers a range of well-site services to U.S. exploration and production (E&P) companies that are fundamental to establishing and enhancing the flow of oil and natural gas throughout the productive life of a well. The segments of the group are High Specification Rigs, Wireline Services and Processing Solutions, and Ancillary Services, of which key revenue is derived from the High Specification Rigs segment.