Downhole safety valve

Details Downhole safety valve Downhole safety valve

E - Fixed Constructions

21

B

E21B 34/10 (2006.01)

Patent

CA 2540997

The present invention generally provides a method and apparatus for selectively sealing a bore. The tubular 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 opening and closing the valve. The tubular valve prevents sudden loss of pressure in the tubular and is controllable from the surface.

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