Union Drilling, Inc. provides contract land drilling services and equipment primarily to independent natural gas producers in the United States. The company offers drilling rigs, as well as the drilling crews and ancillary equipment to operate its drilling rigs. The company provides drilling services to customers primarily engaged in developing unconventional natural gas formations. It has principal operations in the Appalachian Basin; the Arkoma Basin in eastern Oklahoma and Arkansas; and the Fort Worth Basin in northern Texas. As of December 31, 2009, it owned and operated a fleet of 71 land drilling rigs. The company was founded in 1997 and is based in Fort Worth, Texas.