Basic Energy Services, Inc. provides various well site services to oil and natural gas drilling and producing companies in the United States. Its Completion and Remedial Services segment provides pressure pumping services, such as cementing, acidizing, fracturing, coiled tubing, nitrogen, and pressure testing; rental and fishing tools; coiled tubing; snubbing services; thru-tubing; cased-hole wireline services; and underbalanced drilling in low pressure and fluid sensitive reservoirs. This segment operates 222 pressure pumping units. As of December 31, 2011, it operated 12 coiled tubing units; 49 air compressor packages; 12 wireline units; and 26 snubbing units. The company’s Fluid Services segment offers oilfield fluid supply, transportation, storage, and construction services, which comprise the transportation of fluids and salt water; sale and transportation of fresh and brine water; rental of portable frac tanks and test tanks; operation of company-owned fresh water and brine source wells and non-hazardous wastewater disposal wells; and preparation, construction, and maintenance of access roads, drilling locations, and production facilities. This segment operates 890 fluid services trucks. Its Well Servicing segment provides various services performed with a mobile well servicing rig and ancillary equipment, such as maintenance work, hoisting tools and equipment required by the operation, and plugging and abandonment services, as well as manufactures and sells workover rigs. It operates a fleet of 417 well servicing rigs and related equipment. The company’s Contract Drilling segment employs drilling rigs and related equipment to penetrate the earth to a desired depth and initiate production. This segment owns and operates 12 land drilling rigs. The company was formerly known as Sierra Well Service, Inc. and changed its name to Basic Energy Services, Inc. in 2000. Basic Energy Services, Inc. was founded in 1992 and is based in Midland, Texas.