Patent ID: 8181701
Filing Date: 2012-05-22
Classification: E21B

Abstract:
1. A downhole tool including a closure seat for receiving a closure and thereby increasing fluid pressure above the closure seat to perform an operation on the downhole tool and/or another downhole tool, comprising: a tool mandrel having a central throughbore for providing fluid communication between a running string and an interior bore of the tool mandrel; an axially movable closure seat positioned within the tool mandrel for seating with the closure while in a restricted portion of the interior bore in the tool mandrel to restrict radial expansion of the closure seat; a seal body supporting and axially movable with the closure seat, the seal body including a lower body portion below the closure seat; a restriction sleeve supporting the one or more fluid restrictions; a stop for limiting downward movement of the restriction sleeve; a connector for temporarily limiting axial movement of the closure seat with respect to the tool mandrel; another connector interconnecting another sleeve and the lower portion of the seal body; and an actuating piston axially movable with respect to the tool mandrel when the connector is disabled to axially move the closure seat, the actuating piston pressuring a fluid chamber within the tool mandrel such that fluid passes from the fluid chamber through one or more fluid restrictions while the actuating piston moves to reduce the fluid chamber volume and thereby axially move the closure seat to a radially expanded position within the tool mandrel to allow the closure seat to release the closure.