Patterson-UTI Energy, Inc. (Patterson-UTI) owns and operates fleets of land-based drilling rigs in the United States. The Company�s contract drilling business operates in the continental United States, Alaska, and western and northern Canada. The Company operates in three segments, including contract drilling, pressure pumping services and oil and natural gas. The Company conducts its contract drilling operations in the continental United States, Alaska and western and northern Canada. The Company provides pressure pumping services to oil and natural gas operators in Texas and the Appalachian region. The Company also invests in oil and natural gas assets as a non-operating working interest owner. The Company�s oil and natural gas working interests are located in producing regions of Texas and New Mexico.