Ensign Drilling

Ensign United States Drilling (formerly Caza Drilling) serves oil and gas companies exploring in the Western US. A subsidiary of Ensign Energy Services, the company provides contract drilling services primarily in the Rocky Mountain region. It claims to be the second-largest and most active land-based drilling contractor in the Rockies. Ensign United States has 56 drilling rigs in operation in Colorado, Nebraska, Oklahoma, North Dakota, Utah, and Wyoming. In California the drilling contractor operates more than 20 drilling rigs, primarily in the San Joaquin, Los Angeles, and Sacramento basins.