CanElson Drilling Inc. (CanElson) is a Canada-based company is engaged in operating land-based contract drilling rigs in Canada, the United States and Mexico for oil and natural gas exploration and development companies. CanElson�s Drilling Services operates in two geographic segments: Canada (Domestic) and United States/Mexico (Foreign). The Drilling Services Division operates drilling rigs and sells interests in drilling rigs to selected business relationships involving the Company. The business of Drilling Services also includes assembling new drilling rigs at a facility in Nisku, Alberta and the operation of contract oil and gas service rigs in Mexico. The Company also operates a compressed natural gas (CNG) and raw gas (RGT) transportation related services business through its wholly owned subsidiary CanGas Solutions Inc. (CanGas). In July 2013, Calmena Energy Services Inc sold the remaining Canadian Contract Drilling assets to CanElson Drilling Inc.