Control valve system for blowout preventers

Details Control valve system for blowout preventers Control valve system for blowout preventers

E - Fixed Constructions

21

B

166/50

E21B 33/06 (2006.01) E21B 34/16 (2006.01) F15B 11/024 (2006.01)

Patent

CA 1157768

ABSTRACT OF THE DISCLOSURE A control valve system and method are disclosed for blowout preventers having an actuating piston for actuating the closing of the blowout preventer whereby the piston has an opening side and a closing side. The control valve system and method include a means for selectively directing fluid from the opening side of the actuating piston to the closing side of the actuating piston in order to reduce the fluid re- quirements for closing the blowout preventer and reduce in stalled horsepower requirements thereby. Applicant: H. John Bates Title of Invention: Control Valve System for Blowout Preventers -38-

358516

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