US 11,808,110 B2
System and methodology for actuating a downhole device
Cassius Elston, Taubate (BR); Thomas Meeks, Houston, TX (US); Venkata Siva Reddy Battula, Houston, TX (US); and Ashish Sharma, Houston, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Appl. No. 17/594,336
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Apr. 21, 2020, PCT No. PCT/US2020/029097
§ 371(c)(1), (2) Date Oct. 12, 2021,
PCT Pub. No. WO2020/219435, PCT Pub. Date Oct. 29, 2020.
Claims priority of provisional application 62/837,786, filed on Apr. 24, 2019.
Prior Publication US 2022/0186585 A1, Jun. 16, 2022
Int. Cl. E21B 34/10 (2006.01); E21B 34/14 (2006.01)
CPC E21B 34/10 (2013.01) [E21B 34/14 (2013.01); E21B 2200/04 (2020.05)] 20 Claims
OG exemplary drawing
 
18. A method, comprising:
providing an isolation valve with an actuation piston slidably disposed along an internal through passage of a surrounding housing;
creating an intermediate chamber between the actuation piston and the surrounding housing such that pressure in the intermediate chamber acts on the actuation piston in a first direction;
exposing the actuation piston to tubing pressure in a second direction opposite the first direction;
preventing the actuation piston from actuating the isolation valve by blocking communication between the intermediate chamber and an atmospheric pressure chamber formed within a wall of the surrounding housing; and
causing shifting of the actuation piston by opening communication between the intermediate chamber and the atmospheric pressure chamber, and transferring fluid from the intermediate chamber into the atmospheric pressure chamber.