Schlumberger Technology Corporation

Brian Walther

Bo Chen

Rannie Dong

Ashish Sharma

Steven E Buchanan

Brad Swenson

Yann Dufour

Venkata Siva Reddy Battula

Cassius Elston

Maria Tafur

William Ryan Sisak

Diana Orzechowski

A redundant trigger section that actuates a device between operational positions in response to a controlled signal includes a housing including an internal through passage and a plurality of chambers formed in a wall of the housing, a pilot piston disposed within the internal through passage, an actuating piston connected to the pilot piston, and a plurality of triggers connected to the actuating piston. Upon receipt of the controlled signal by a first tubing pressure chamber of the plurality of chambers, at least one trigger of the plurality of triggers activates the actuating piston, which pushes the pilot piston within the internal through passage from an initial position to a final position.

Redundant trigger system

A shifting tool for use with an isolation valve. The shifting tool may include a mandrel and a first shifting assembly positioned about the mandrel. The first shifting assembly may include a shifting member engageable with a profile of the isolation valve to shift the isolation valve into at least one of an open position or a closed position, a sleeve engageable with the shifting member to prevent disengagement between the shifting member and the isolation valve, and a detent mechanism engageable with the shifting member to prevent disengagement between the sleeve and the shifting member. The detent mechanism may engage with the shifting member when the shifting tool initially engages with an isolation valve and relative movement of the shifting tool with respect to the isolation valve may disengage the detent mechanism from the shifting member when the detent mechanism reaches predetermined location within isolation valve.

Positional-release mechanism for a downhole tool

A core rod has internal and external profiles disposed in a housing assembly. A power spring in cooperation with the core rod within the housing assembly is connected to a power spring stopper that is fixed to the housing assembly with at least one shear screw. An inner axial cycling piston bar includes an external profile for mating engagement with the internal profile of the core rod. The inner axial cycling piston bar is connected to a piston in cooperation with a cycling spring, and the piston is configured to move in an upward direction. When a downward force exerted by the cycling spring exceeds the upwardly applied cycling force, the piston, the inner axial cycling piston bar, and the external profile move in a downward direction, thereby causing the core rod to move an incremental distance in the downward direction, which compresses the power spring by the incremental distance.

Hydraulic trigger for isolation valves

A system includes a compression spring having a latch sleeve, a piston rod including a groove section, and a ratchet assembly that progressively moves the piston rod in a downward direction. A latch collet on the latch sleeve sits on the groove section of the piston rod in a first position of the system. The latch collet locks a spring force of the compression spring as the ratchet assembly progressively moves the piston rod in the downward direction. The latch collet becomes unsupported from the groove section when the piston rod has progressively moved a predetermined distance, causing the compression spring to release and provide a push force that actuates a hydraulic valve from the first position to a second position.

Hydraulic trigger with locked spring force

An isolation valve includes a ball valve element, an actuation section to rotate the ball valve element, and a trigger section that actuates the actuation section in response to a pressure differential. The actuation section includes an actuation mandrel, a piston housing that at least partially encases the actuation mandrel, a collet piston, and a holding collet. The piston housing and the actuation mandrel define a hydraulic chamber, and the collet piston separates the hydraulic chamber into an upper hydraulic chamber and a lower hydraulic chamber. The holding collet supports the collet piston during a stroke of the actuation mandrel that is triggered by the trigger section. The collet piston is configured to assume a rest position on the actuation mandrel before and during the stroke of the actuation mandrel, and the collet piston is configured to disengage from the actuation mandrel after the stroke of the actuation mandrel.

Disengaging piston for linear actuation

An isolation valve system includes a well string having an isolation valve including a ball rotatably mounted to a pair of inserts for rotation about a fixed axis, an arm coupled to the ball at a position offset from the fixed axis, and a mandrel connected to an actuation end of the arm, the mandrel and the actuation end of the arm being disposed uphole of the ball. Via the actuation end of the arm, the mandrel forces rotation of the ball from a closed position to an open position by moving in a linear direction away from the ball, which allows flow of fluid along a through hole of the ball.

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Houston, TX, United States of America

Brian Walther