US 12,305,466 B2
Liner hanger system and method with non-pressure sensitive actuation
Juan Pablo Macin Moreno, Rosharon, TX (US); Jose Hurtado, Houston, TX (US); Mikhail Gotlib, Houston, TX (US); George Telfer, Aberdeen (GB); and Stephen Lewis, Aberdeen (GB)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 17/758,655
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Jan. 18, 2021, PCT No. PCT/US2021/013824
§ 371(c)(1), (2) Date Jul. 12, 2022,
PCT Pub. No. WO2021/150458, PCT Pub. Date Jul. 29, 2021.
Claims priority of provisional application 62/963,334, filed on Jan. 20, 2020.
Prior Publication US 2023/0055946 A1, Feb. 23, 2023
Int. Cl. E21B 43/10 (2006.01); E21B 33/04 (2006.01)
CPC E21B 33/0422 (2013.01) 17 Claims
OG exemplary drawing
 
9. A method, comprising:
deploying a liner hanger assembly downhole via a running tool;
locking a liner hanger of the liner hanger assembly in a radially collapsed configuration via a locking dog mounted in and retained by the liner hanger, wherein the locking of the liner hanger comprises:
using a plurality of the locking dogs held in a radially outward position to block actuation of the liner hanger; and
holding the plurality of the locking dogs in engagement with an inner surface of a corresponding hydraulic cylinder of the liner hanger via a sleeve coupled to a piston of the running tool;
dropping a ball down to a ball seat in the liner hanger assembly to enable creation of a pressure differential between an inner pressure region of the running tool and an intermediate pressure region surrounding the running tool; and
using the pressure differential to shift the piston of the running tool so as to release the locking dog.