US 12,297,929 B2
Hydraulic trigger for isolation valves
Bo Chen, Houston, TX (US); and Brian Walther, Missouri City, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Jul. 1, 2024, as Appl. No. 18/760,634.
Application 18/760,634 is a continuation of application No. 17/760,114, granted, now 12,025,238, previously published as PCT/US2021/018278, filed on Feb. 17, 2021.
Claims priority of provisional application 62/978,085, filed on Feb. 18, 2020.
Prior Publication US 2024/0353023 A1, Oct. 24, 2024
Int. Cl. F16K 31/163 (2006.01); E21B 21/10 (2006.01); E21B 23/00 (2006.01); E21B 34/10 (2006.01); E21B 34/14 (2006.01); F15B 15/06 (2006.01); F16K 17/04 (2006.01); F16K 31/122 (2006.01)
CPC F16K 31/163 (2013.01) [E21B 21/10 (2013.01); E21B 23/004 (2013.01); E21B 34/10 (2013.01); E21B 34/103 (2013.01); E21B 34/14 (2013.01); F15B 15/06 (2013.01); F16K 31/122 (2013.01); F16K 17/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydraulic trigger system, comprising:
a housing assembly;
a core rod disposed in the housing assembly, the core rod comprising an internal profile and an external profile;
a power spring in cooperation with the core rod within the housing assembly, the power spring connected to a power spring stopper that is fixed to the housing assembly with at least one shear mechanism;
an inner axial cycling piston bar comprising an external profile for mating engagement with the internal profile of the core rod;
wherein, upon application of a cycling force on one end of the inner axial cycling piston bar in a downward direction, the inner axial cycling piston bar moves in the downward direction by an increment distance, thereby causing the core rod to move an incremental distance in the downward direction, which compresses the power spring by the incremental distance,
wherein the inner axial cycling piston bar is configured to move in an upward direction when the cycling force changes to the upward direction,
wherein movement of the inner axial cycling piston bar in the upward direction also moves the external profile of the inner axial cycling piston bar in the upward direction, which causes the external profile of the inner axial cycling piston bar to collapse, disengage from the internal profile of the core rod, and skip to re-engage the internal profile of the core rod at a location measuring the incremental distance away, and
wherein an outer ring prevents the core rod from moving in the upward direction.