Pressure actuated tubing safety valve

Details Pressure actuated tubing safety valve Pressure actuated tubing safety valve

E - Fixed Constructions

21

B

E21B 34/10 (2006.01) E21B 34/06 (2006.01) F16K 17/04 (2006.01)

Patent

CA 2521934

The present invention generally provides a downhole valve for selectively sealing a bore. The downhole valve generally includes a closing member for seating in and closing the bore, and a pressure-actuated, retention member having first and second opposed piston surfaces for initially holding the valve in an open position but, in the event of a pressure differential between the piston surfaces, permits the closing member to operate and close the valve.

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