DUAL BALL UPPER INTERNAL BLOW OUT PREVENTER VALVE

摘要

An internal blowout preventer used in drilling rigs for the discovery and production of hydrocarbons from the earth ( 20 ) is disclosed. The internal blowout preventer has two independently and remotely operable blowout preventer valves ( 22, 23 ) in the same body ( 23 ), providing for greater service life and higher reliability during drilling operations. The two valves are loaded into the internal blowout preventer housing ( 23 ) from a single end, and are operable by an actuator assembly.