Interventionless operation of downhole tool
AssigneeSchlumberger Technology Corporation
InventorDinesh R. Patel
Life of this patent
Estimating the term…
Abstract
A technique facilitates actuation of a downhole tool, such as a valve, in a simple, rapid, and cost-effective manner. The technique comprises installing the downhole tool with a trip saver. The trip saver can be actuated by increasing a tubing pressure or other suitable pressure source beyond a threshold level. Once the trip saver is actuated, a fluid under suitable pressure is provided to a downhole tool through a passageway opened via the trip saver. This enables actuation of the downhole tool to a desired state.
Claims20
A valve system, comprising:
- an actuation component coupled to formation pressure and comprising:
- a compensating piston;
- and
- an oil chamber;
- a trip saver component coupled to tubing pressure and comprising:
- one or more rupture discs configured to burst upon reaching a threshold pressure;
- and
- a pressure isolation piston temporarily retained within a valve block via a shear member;
- and
- an actuator comprising an operating piston fluidly coupled to the valve block;
- wherein after the tubing pressure reaches the threshold pressure, the one or more rupture discs are burst, translating the pressure isolation piston within the valve block, shearing the shear member, and establishing communication between the oil chamber and the actuator to actuate a device to a desired state.
A method of downhole actuation, comprising:
- providing an actuation component with a compensating piston acting against a liquid in a liquid chamber;
- forming a trip saver component with a rupture member and a pressure isolation piston;
- exposing the compensating piston to a first wellbore region subjected to pressure and exposing the rupture member to a second wellbore region subjected to pressure;
- and
- using the pressure isolation piston to block flow of the liquid against an actuator of a downhole tool prior to rupturing the rupture member.
A method of operating a well system, comprising:
- installing a valve comprising a trip saver;
- actuating the trip saver by increasing a tubing pressure beyond a threshold level;
- providing pressure to a valve actuator through a passageway opened via actuating the trip saver;
- and
- actuating the valve to a desired state.
Dependencies are inferred from the claim text.