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US 10,208,568 B2Granted
Downhole tool with an isolated actuator
AssigneeSchlumberger Technology Corporation
InventorsSteven Nicholas Hill, Geoffrey Pinard, Megan Laura Buchheit
Life of this patent
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Abstract
A downhole tool in accordance to aspects of the disclosure includes a housing forming a bore to convey a wellbore fluid, an actuating piston moveably disposed in a cylinder located in the housing adjacent to the bore and a barrier fluid isolating the actuating piston from the bore. The downhole tool may include a compensator piston in communication with the barrier fluid and the bore that is moveable to balance the pressure between the barrier fluid and the bore.
Claims13
A downhole tool, the downhole tool comprising:
- a housing forming a bore to convey a wellbore fluid;
- an actuating piston moveably disposed in a cylinder located in the housing adjacent to the bore;
- a barrier fluid isolating the actuating piston from the bore;
- a compensator piston in communication with the barrier fluid and the bore, the compensator piston moveable to balance the pressure between the barrier fluid and the bore;
- and
- a check valve device adapted to selectively allow fluid to flow across the compensator piston between the bore and the barrier fluid.
3 more elements
A method, comprising:
- utilizing a downhole tool in a wellbore, the downhole tool comprising a housing forming a bore to convey a wellbore fluid, an actuating piston moveably disposed in a cylinder located in the housing, a barrier fluid isolating the piston from the bore;
- balancing pressure between the barrier fluid and the bore in response to moving a compensator piston in communication between the barrier fluid and the bore;
- and
- selectively allowing fluid to flow across the compensator piston between the bore and the barrier fluid.
1 more element
A well system, the system comprising:
- a downhole tool connected in a tubular string and disposed in a wellbore, the downhole tool comprising:
- a housing forming a bore to convey a wellbore fluid;
- an actuating piston moveably disposed in a cylinder located in the housing adjacent to the bore;
- a barrier fluid isolating the actuating piston from the bore;
- a compensator piston in communication with the barrier fluid and the bore, the compensator piston moveable to balance the pressure between the barrier fluid and the bore;
- and
- a check valve device adapted to selectively allow fluid to flow across the compensator piston between the bore and the barrier fluid.
4 more elements
Dependencies are inferred from the claim text.