SandRidge Energy, Inc. is an independent oil and natural gas company. The Company is engaged in development and production activities in the Mid-Continent, Gulf of Mexico and Permian Basin in west Texas. Its primary area of focus is the Mississippian formation, a shallow hydrocarbon system in the Mid-Continent area of northern Oklahoma and Kansas. The Company also operates businesses that are complementary to its primary development and production activities, including gas gathering and processing facilities, an oil and natural gas marketing business and an oil field services business, including its wholly owned drilling rig business, Lariat Services, Inc. (Lariat). As of December 31, 2012, the Company's drilling rig fleet consisted of 30 operational rigs. The Company operates in three segments: exploration and production, drilling and oil field services and midstream services. In April 2012, it acquired Dynamic Offshore Resources, LLC (Dynamic).