Provider of cased-hole wireline services to the domestic natural gas and oil production industry. The company's cased-hole wireline services that are delivered from electric-line and slickline units, includes logging, perforating, pipe recovery, and other mechanical services which are provided to the domestic natural gas and oil production industry. It provides of a full range of case hole wireline services in the Permian basin in Texas and in unconventional plays such as the Barnett, Marcellus, Haynesville, Bakken, Eagle Ford and Woodford oil and natural gas shales, located throughout the U.S. Gray has a total of 110 wireline units and operates in 18 district locations, providing access to approximately 85% of all active U.S. drilling rigs and generating a balanced revenue stream from liquids and gas.