US 12,442,276 B2
Redundant trigger system
Maria Fernanda Tafur, Houston, TX (US); Bo Chen, Stanford, CA (US); Yann Dufour, Houston, TX (US); Brian Walther, Missouri City, TX (US); Brad Swenson, Friendswood, TX (US); and Steven E. Buchanan, Pearland, TX (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 18/552,475
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Mar. 23, 2022, PCT No. PCT/US2022/021548
§ 371(c)(1), (2) Date Sep. 26, 2023,
PCT Pub. No. WO2022/204284, PCT Pub. Date Sep. 29, 2022.
Claims priority of provisional application 63/166,506, filed on Mar. 26, 2021.
Prior Publication US 2024/0368968 A1, Nov. 7, 2024
Int. Cl. E21B 34/14 (2006.01)
CPC E21B 34/14 (2013.01) [E21B 2200/04 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A system for use in a well, comprising:
a well string having an isolation valve disposed along the well string to selectively block or allow fluid flow along an interior of the well string, the isolation valve comprising:
a ball section having a ball valve element rotatable between a closed position and an open position;
a mechanical section coupled with the ball section to rotate the ball valve element; and
a redundant trigger section that actuates the mechanical section, and thus the ball section, in response to a controlled signal, the redundant trigger section having:
a valve block having a housing comprising a first end and a second end, the valve block further comprising:
a pilot piston disposed within an internal through passage of the housing between the first and second ends of the housing, the pilot piston having an initial position;
a plurality of chambers formed in a wall of the housing, the plurality of chambers including:
 a first tubing pressure chamber; an atmospheric pressure chamber;
 a lower chamber; and
 an upper chamber,
 wherein the upper chamber is disposed at the second end of the housing, the upper chamber being coaxial with the internal through passage of the housing; and
an actuating piston connected to the pilot piston at the first end of the housing;
a plurality of triggers connected to the actuating piston;
wherein, upon receipt of the controlled signal by the first tubing pressure chamber, at least one trigger of the plurality of triggers activates the actuating piston, which pushes the pilot piston within the internal through passage of the housing from the initial position to a final position; and
a lower coupling disposed at the upper chamber that couples the valve block to the mechanical section.