US 12,276,352 B2
Hydraulic trigger with locked spring force
Bo Chen, Houston, TX (US); Brian Walther, Missouri City, TX (US); and Rannie Dong, Houston, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Aug. 25, 2023, as Appl. No. 18/455,996.
Application 18/455,996 is a continuation of application No. 17/995,939, granted, now 11,774,002, previously published as PCT/US2021/027951, filed on Apr. 19, 2021.
Claims priority of provisional application 63/011,478, filed on Apr. 17, 2020.
Prior Publication US 2023/0400118 A1, Dec. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F16K 31/163 (2006.01); E21B 34/06 (2006.01); E21B 34/08 (2006.01); F16K 11/044 (2006.01); F16K 31/363 (2006.01)
CPC F16K 31/163 (2013.01) [F16K 11/044 (2013.01); F16K 31/363 (2013.01); E21B 34/06 (2013.01); E21B 34/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system, comprising:
a compression spring having a compressed state and an expanded state;
a piston rod coupled to the compression spring, wherein the piston rod is movable from a first position to a second position; and
a ratchet assembly, wherein the ratchet assembly is engaged with the piston rod and is configured to move the piston rod from the first position to the second position, wherein:
the compression spring is locked in the compressed state when the piston rod is in the first position;
the compression spring is released and is allowed to expand to the expanded state when the piston rod is in the second position; and
when the compression spring expands to the expanded state, the compression spring moves the piston rod to a third position to actuate a hydraulic valve.