Blowout preventer valve and bop stack

Details Blowout preventer valve and bop stack Blowout preventer valve and bop stack

E - Fixed Constructions

21

B

166/50

E21B 33/06 (2006.01) E21B 33/035 (2006.01) E21B 33/064 (2006.01)

Patent

CA 1239091

Abstract of the Disclosure A novel blowout preventer valve is provided herein for connection between a riser connector and a wellhead connector of a sub-sea well. The valve includes a generally cylindrical body connectable in a riser string as a replacement for a riser, the generally cylindrical body being provided with an access opening through the wall thereof, the access opening being closed by cover plate. Two segments of a hollow sphere are rotationally mounted within the generally cylind- rical body, each such segment having a driven shaft projecting outwardly from the generally cylindrical body. Positively actuatable means, e.g. a rotary hydraulic actuator, is provided for rotating the segments towards and away from one another between an open position, where there is free access to the borehole of the well, and a closed position, where a sealed closure is provided on the drill pipe. The valve so provided is smaller in size and lighter in weight than conventional BOP valves, and has less assemblege com- ponents.

472500

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