Precision Drilling Corporation provides contract drilling, and completion and production services to oil and natural gas exploration and production companies. Its Contract Drilling Services segment offers land drilling, directional drilling, and turnkey drilling services; trucking services for the movement of precision rigs; and procures and distributes oilfield supplies, as well as manufactures and refurbishes drilling and service rig equipments. As of December 31, 2011, this segment operated 188 land drilling rigs in Canada, 143 land drilling rigs in the United States, 3 land drilling rigs in Saudi Arabia, 2 land drilling rigs in Mexico, and 1 land drilling rig in Colombia. The company’s Completion and Production Services segment offers service rigs for well completion and workover services; snubbing services; camp and catering services; and wastewater treatment services, as well as is involved in the rental of oilfield surface equipment, tubulars, well control equipment, wellsite accommodations, and drilling camps. As of December 31, 2011, this segment operated 189 well completion and workover service rigs and 17 snubbing units in Canada; 1 snubbing unit in the United States; 232 wellsite accommodation units in Canada; 28 wellsite accommodation units in the United States; 86 small-flow wastewater treatment units, 4 large-flow wastewater treatment units, and 3 potable water production units in Canada; 56 drilling camps and 2 base camps in Canada; and 4 drilling camps in the United States, as well as provided approximately 11,100 oilfield rental items, including well control equipment, surface equipment and specialty tubulars in Canada. Precision Drilling Corporation was founded in 1951 and is headquartered in Calgary, Canada.