Abstract: 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.

Abstract: 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 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 selectively 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.

Abstract: 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 cartridge arranged in the flowbore. The backpressure valve cartridge includes a valve seat and a flapper valve pivotally mounted relative to the valve seat. The backpressure valve cartridge is shiftable along the longitudinal axis to shift the flapper valve between a first position, wherein the flapper valve rests on the valve seat, and a second position, wherein the flapper valve is pivoted away from the valve seat.

Abstract: 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 cartridge arranged in the flowbore. The backpressure valve cartridge includes a passage, a valve seat arranged in the passage, and a flapper valve pivotally mounted relative to the valve seat in the passage. The valve seat is shiftable within the backpressure valve cartridge along the longitudinal axis to shift the flapper valve between a first position, wherein the flapper valve is free to pivot relative to the valve seat, and a second position, wherein the flapper valve is pivoted away from the valve seat and maintained in an open configuration.

Abstract: 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.

Abstract: 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.

Abstract: 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 cartridge arranged in the flowbore. The backpressure valve cartridge includes a passage, a valve seat arranged in the passage, a flapper valve pivotally mounted relative to the valve seat in the passage, and a piston member configured to shift the flapper valve between a first position, wherein the flapper valve is free to pivot relative to the valve seat, and a second position, wherein the flapper valve is pivoted away from the valve seat and maintained in an open configuration.

Abstract: 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.

Abstract: 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 cartridge arranged in the flowbore. The backpressure valve cartridge includes a passage, a valve seat arranged in the passage, and a flapper valve pivotally mounted relative to the valve seat in the passage. The valve seat is shiftable within the backpressure valve cartridge along the longitudinal axis to shift the flapper valve between a first position, wherein the flapper valve is free to pivot relative to the valve seat, and a second position, wherein the flapper valve is pivoted away from the valve seat and maintained in an open configuration.

Abstract: 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.

Abstract: 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 cartridge arranged in the flowbore. The backpressure valve cartridge includes a valve seat and a flapper valve pivotally mounted relative to the valve seat. The backpressure valve cartridge is shiftable along the longitudinal axis to shift the flapper valve between a first position, wherein the flapper valve rests on the valve seat, and a second position, wherein the flapper valve is pivoted away from the valve seat.

Abstract: 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 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 selectively 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.

Abstract: 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.

Abstract: 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 cartridge arranged in the flowbore. The backpressure valve cartridge includes a passage, a valve seat arranged in the passage, a flapper valve pivotally mounted relative to the valve seat in the passage, and a piston member configured to shift the flapper valve between a first position, wherein the flapper valve is free to pivot relative to the valve seat, and a second position, wherein the flapper valve is pivoted away from the valve seat and maintained in an open configuration.

Abstract: A connector for a coiled tubing end anchors internally and seals externally. The anchor profile is split with a gap to clear an internal spline without need to remove the spline to allow a seal to enter the coiled tubing since the seal is mounted internally to a sleeve that envelops the end of the coiled tubing. Component relative rotation extends the internal anchor radially against the coiled tubing inner wall to secure the connection with the seal engaged to the coiled tubing outer wall.

Abstract: A circulation sub and method of operating a circulation sub. The circulation sub includes a support member having a longitudinal axis and a piston movable along the longitudinal axis of the support member. A release member secures the piston to the support member. A force is applied along a length axis of the release member greater than a selected decoupling force threshold to decouple the support member from the piston, thereby allowing the piston to move along the longitudinal axis of the member.

Abstract: A connector for a coiled tubing end anchors internally and seals externally. The anchor profile is split with a gap to clear an internal spline without need to remove the spline to allow a seal to enter the coiled tubing since the seal is mounted internally to a sleeve that envelops the end of the coiled tubing. Component relative rotation extends the internal anchor radially against the coiled tubing inner wall to secure the connection with the seal engaged to the coiled tubing outer wall.

Abstract: A connector for a coiled tubing end anchors internally and seals externally. The anchor profile is split with a gap to clear an internal spline without need to remove the spline to allow a seal to enter the coiled tubing since the seal is mounted internally to a sleeve that envelops the end of the coiled tubing. Component relative rotation extends the internal anchor radially against the coiled tubing inner wall to secure the connection with the seal engaged to the coiled tubing outer wall.

Abstract: A system and method for adjusting or controlling at least one milling operating feature of a cutting mill assembly within a wellbore includes sensing at least one milling operating parameter with a sensor that is operably associated with the cutting mill assembly that is run into the wellbore. At least one milling operating feature of the cutting mill assembly is adjusted or controlled in response to the at least one milling operating parameter that is sensed.