Patent ID: 8424611

Claim:
A downhole valve, comprising: a housing having a bore; a closure device actuatable between opened and closed conditions in the bore and having at least one flapper, the closure device in the closed condition disposed across the bore to isolate the bore in first and second directions; and an actuating sleeve axially movable in the bore between first and second positions and actuating the closure device, the actuating sleeve having: an internal profile engageable in the first direction and moving the actuating sleeve to the first position to actuate the closure device to the closed condition, and at least one moveable dog movable axially in the bore with the actuating sleeve and movable between extended and retracted conditions relative to the bore, the at least one movable dog having the extended condition extended into the bore when the actuating sleeve has the first position, the at least one movable dog having the retracted condition retracted from the bore when the actuating sleeve has the second position, wherein the at least one movable dog in the extended condition engages a tool passing in the second direction in the bore and moves the actuating sleeve to the second position to actuate the closure device to the opened condition, and wherein the at least one movable dog, upon the actuating sleeve reaching the second position, moves to the retracted condition retracted from the bore and releases passage of the tool in the second direction through the closure device in the open condition.