A downhole flow control system utilizes a tubing pressure operated valve to selectively open and close fluid flow across the system. The tubing pressure operated valve includes a piston responsive to tubing pressure, and a valve element responsive to piston movement. The valve element can be moved rotationally, longitudinally, or both, in response to the piston movement. The valve is movable between a closed and at least one open position. The piston and valve elements can be releasably attachable, such as by a one-way ratchet. The valve element can be a rotating valve operable by a J-slot mechanism to rotate to multiple positions in response to movement of the piston element.

A tool includes a housing between an outer wall and an inner wall that surrounds a longitudinal tool bore. First and second axially spaced ports connect the housing to the tool bore. An unlocking piston seals across the first port and an arming sleeve seats across the second port. A locking ring is held in place by a retaining ring and prevents the arming sleeve from sliding towards the unlocking piston to open the second port. An unlocking tool bore pressure at the first port moves the unlocking piston axially to displace the retaining ring and unlock the tool. A lower, arming tool bore pressure moves the arming sleeve in the unlocked tool to open the second port and arms the tool. An actuating tool bore pressure, which is less that the unlocking pressure, actuates a valve piston via the open second port.

An oil field tubular for use as part of a well string, includes a hollow tube that forms a passage, each end of the tube configured for connection to the end of an adjacent string section to form a continuous string; a flapper, integrally connected within the hollow tube so that the flapper can move between an open position where the flapper allows fluids to pass through the hollow tube and a closed position where the flapper closes the passage and prevents passage of fluids therethrough, the flapper spaced away from the end connections of the hollow tube, the hollow tube further including a recess formed into part of the side wall, the flapper and tube configured so that in the open position the flapper locates into the recess.

An assembly and a method for stopping a fluid flow through a stuck open inflow control device are described. An inflow control valve includes a valve body with an inlet, an inner sleeve, and an outer sleeve, and an actuation mechanism. The inner sleeve is movably coupled to an inner surface of the valve body to control fluid flow through the valve body. The outer sleeve is coupled to an outer surface of the valve body to stop the fluid flow through the inlet when the inner sleeve is stuck open. The outer sleeve is movable from a position allowing fluid flow through the valve body to a locked position stopping fluid flow through the valve body. The actuation mechanism moves the outer sleeve from the position offset from the inlet to the locked position.

A flow control apparatus with a guide housing having one or ports, a breakable bond, and a platform with an upper surface having one or more pistons. The platform and guide housing have a first bonded configuration where the pistons are received in the ports, a breaking configuration, an opening configuration where the platform is movable away from the guide housing, and a misaligned configuration where the platform is displaced with respect to the guide housing. The guide housing has a guide bore and the platform has a guide projection extending into the guide bore. The guide bore has a groove and the guide projection has an extension extending in the groove for transitioning between configurations.

A flapper valve assembly that includes a tubular forming an interior passageway and comprising an internal shoulder; a valve seat forming a portion of the interior passageway and spaced from the internal shoulder to form a flapper chamber; a flapper plate that is pivotably mounted to the tubular at a pivot point and positioned within the flapper chamber; wherein the flapper plate is pivotable within the flapper chamber between a valve closed and valve open position; and a first spring extending within the flapper chamber and engaging the flapper plate such that the flapper plate is biased towards the valve closed position; wherein the first spring comprises spaced right and left arms that are in contact with the flapper plate; and wherein, when the flapper plate is in the valve closed position, each of the right and left arms extends away from the flapper plate and towards the internal shoulder.

A plug with a resettable closure member including a body defining a flow bore and a closure member seat, a closure assembly connected to the body, the assembly includes a closure member and a magnetic catch disposed to hold the closure member in an open position, the magnetic catch being configured to release the closure member upon a selected hydrodynamic load upon the closure member.

A downhole tool includes a tubular having an outer surface and an inner surface defining a flowbore having a longitudinal axis, and a backpressure valve arranged in the flowbore. The backpressure valve includes a flapper valve having a first side and an opposing second side pivotally mounted to the inner surface to selectively extend across the flowbore and a locking system mounted to the inner surface in the flowbore and snap-fittingly engageable with the flapper valve. The flapper valve is pivotable between a first position, wherein the flapper valve is free to pivot relative to the inner surface, and a second position, wherein the flapper valve is pivoted away from the flowbore and locked open by the locking system such that the first side forms part of the flowbore.

A downhole tool includes a tubular having an outer surface and an inner surface defining a flowbore having a longitudinal axis. A backpressure valve is arranged in the flowbore. The backpressure valve includes a flapper valve including a first side and an opposing second side pivotally mounted to the inner surface to selectively extend across the flowbore and a locking system including a spring clip mounted to the inner surface. The flapper valve is pivotable between a first position, wherein the flapper valve is free to pivot relative to the inner surface, and a second position, wherein the flapper valve is pivoted away from the flowbore and locked open by the spring clip such that the first side forms part of the flowbore.

A downhole tool includes a tubular having an outer surface and an inner surface defining a flowbore having a longitudinal axis and a backpressure valve arranged in the flowbore. The backpressure valve includes a flapper valve including a hinge end, a cantilevered end, a first side and an opposing second side pivotally mounted to the inner surface at the hinge end to selectively extend across the flowbore, and a locking system mounted to the inner surface adjacent to the hinge end of the flapper valve in the flowbore. The flapper valve is pivotable between a first position, wherein the flapper valve is free to pivot relative to the inner surface between an open configuration and a closed configuration, and a second position, wherein the hinge end of the flapper valve activates the locking system to lock the flapper valve in the open configuration.