Valve having releasable latch mechanism

Details Valve having releasable latch mechanism Valve having releasable latch mechanism

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 11/065 (2006.01) E21B 21/10 (2006.01)

Patent

CA 2100389

ABSTRACT A VALVE HAVING RELEASABLE LATCH MECHANISM A valve having a releasable latch mechanism and serving to control the flow of liquid within an outer conduit, and comprising: an inner conduit positionable substantially coaxially within the outer conduit and defining an annulus between the outer conduit and the inner conduit; a first port formed in the wall of the inner conduit for communicating annulus pressure into the inner conduit; a piston movable axially within the inner conduit between a closed position and an open position, the piston comprises a second port allowing passage of fluid from within the piston into the inner conduit, and further comprising a passage extending through the piston; latching means for holding the piston in the closed position; and biasing means for biasing the piston to the closed position, and a third port formed in the wall of the inner conduit; whereby when the piston is in the open position the second and third ports are aligned, allowing passage of fluid from within the piston to the outer conduit, thereby by-passing the inner conduit.

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