Split-stack blowout prevention system

Details Split-stack blowout prevention system Split-stack blowout prevention system

E - Fixed Constructions

21

B

166/50

E21B 7/12 (2006.01) E21B 17/01 (2006.01) E21B 33/037 (2006.01) E21B 33/06 (2006.01) E21B 33/064 (2006.01)

Patent

CA 1095401

ABSTRACT OF THE DISCLOSURE SPLIT-STACK BLOWOUT PREVENTION SYSTEM A blowout prevention system for an offshore structure positioned on the underwater bottom in a body of water which con- tains moving ice masses that could force the structure off location wherein a surface blowout preventer stack for conventional well control is connected to the upper end of a riser with the lower end of the riser being disconnectably connected to a subsurface flowout preventer stack which provides the necessary well control should the structure be forced off location. The subsurface stack is positioned on a wellhead located in a chamber in the subsea bottom and is disconnectably connected to the riser so that the riser may be quickly removed from the subsea bottom should the structure be forced off location.

317414

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