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 is disclosed. The internal blowout preventer has two independently and remotely operable blowout preventer valves in the same body, providing for greater service life and higher reliability during drilling operations. The two valves are loaded into the internal blowout preventer housing from a single end, and are operable by an actuator assembly.

主权项

1. An internal blowout preventer for use in drilling operations, comprising:
a housing having first and second openings at opposite first and second ends of the housing, and having a flow passage between the openings; first and second valves located in the flow passage in the housing, each valve being movable between an open position in which the flow passage is open and a closed position in which the flow passage is closed; and an actuator assembly coupled to the housing for independently operating the first or second valve, wherein the first and second valves are received into the housing through the first opening, and wherein each valve comprises a ball valve seated between a fixed seat and a spring loaded floating seat, and wherein, for each valve, the fixed seat is between the ball valve and the second opening and the spring loaded floating seat is between the ball valve and the first opening.