SandRidge Energy, Inc. is an oil and natural gas company. The Company operates in three business segments: exploration and production, drilling and oil field services, and midstream services. The exploration and production segment explores for, develops and produces oil and natural gas in the Mid-Continent. The drilling and oil field services segment performs services for third parties, including third-party working interests in wells that it operates. The midstream services segment is engaged in gas marketing. The Company focuses on exploration and production activities in the Mid-Continent region of the United States. It also operates businesses and infrastructure systems, including gas gathering and processing facilities, marketing operations, a saltwater disposal system, an electrical transmission system and a drilling rig and related oil field services business. As of December 31, 2014, the Company’s drilling rig fleet consisted of 25 operational rigs.