Founded in 1968, Williams Tool Company designs, manufactures, supplies and services the global drilling industry with a full range of Rotating Control Heads and accessories for well control and other uses when drilling for oil, gas, coal bed methane, and geothermal resources. Also known as rotating blowout preventers, diverter-preventers, or control heads, Williams' products serve as key well control and drilling efficiency tools when drilling in a wide range of surface pressures, down hole conditions, and drilling fluids. Williams rotating control heads provide complete containment and diversion of drilling fluids and gas or air blows, dust, cuttings and steam to reduce operating costs, reduce environmental impact and improve safety for all types of wells - vertical, horizontal, multi-lateral, overbalanced, and underbalanced.