|Ensco plc (Ensco), formerly Ensco International plc, is a global offshore contract drilling company. The Company's business operates in four segments: Deepwater, Asia Pacific, Europe and Africa and North and South America. Each of its four operating segments provides one service, contract drilling. The Company is engaged in the drilling of offshore oil and natural gas wells by providing its drilling rigs and crews under contracts with major international, government-owned and independent oil and gas companies. As of February 15, 2011, its offshore rig fleet included 40 jackup rigs, five ultra-deepwater semisubmersible rigs and one barge rig. Additionally, the Company had three ultra-deepwater semisubmersible rigs and two ultra-high specification harsh environment jackup rigs under construction. The Company provides of offshore contract drilling services to the international oil and gas industry.