Schlumberger Technology Corporation

Michael Jasper

Jerome Prost

David Clayton

Brad Swenson

Gabriel Isaicu

Julia Huynh

Emrah Gokdag

Ron Perez

Dongyang Chen

A technique facilitates actuation of flow control valves or other types of downhole devices. According to an embodiment, the downhole devices are coupled with corresponding first hydraulic control lines for hydraulically actuating each downhole device to a first operational position. The downhole devices also are coupled to a common second hydraulic control line which may be used in cooperation with selective hydraulic circuits to actuate individual downhole devices to a second operational position. For example, an individual selective hydraulic circuit may be coupled between each first hydraulic control line and the common second hydraulic control line at each downhole device. The selective hydraulic circuit is configured to enable actuation of the corresponding downhole device to the second operational position.

System and methodology for selective actuation of a downhole device

A technique provides a desired control over incremental actuation of hydraulic devices. A hydraulically actuated tool is combined with a control module. The hydraulically actuated tool has an actuator piston positioned in a piston chamber and movable between operating positions. The control module comprises a hydraulic indexing circuit arranged to enable incremental movement of the actuator piston in a first direction and full stroke movement in a second direction based on hydraulic input delivered via control lines. The hydraulic indexing circuit comprises an indexing piston system and at least one check valve working in cooperation with the indexing piston system to enable the incremental and full stroke movements.

Hydraulic indexing system

A technique facilitates actuation of a downhole device, e.g. a flow control valve. The downhole device is shifted between positions by an actuator piston, which is movable in a first direction via hydraulic actuating fluid supplied by a first control line and in a second direction via hydraulic actuating fluid supplied by a second control line. A hydraulic circuit is coupled between the first control line and the second control line to enable a complete stroke of the actuator piston in one direction, e.g. the second direction, while limiting movement of the actuator piston to incremental movements in the other direction, e.g. the first direction. The hydraulic circuit employs a hydraulic enabled regulator having a plurality of pistons arranged to control the supply of hydraulic actuating fluid to achieve the desired incremental movements of the actuator piston.

System and methodology for controlling actuation of devices downhole

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Saint Johns, FL, United States of America

Michael Jasper