Gas lift valve
AssigneeWeatherford/Lamb, Inc.
InventorsStephen David LONG, Zlatko SALIHBEGOVIC, J. Michael HOPE
Life of this patent
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Abstract
A method for performing downhole gas lift operations includes coupling a gas lift valve to a tubing, wherein the gas lift valve includes an actuator, a flow control device disposed in the actuator, and a closure member that is initially in an open position; injecting a gas downhole and exterior to the tubing; urging the gas to enter the tubing via the gas lift valve; and creating a sufficient pressure differential across the gas lift valve to move the actuator, thereby causing the closure member to close the gas lift valve.
Claims20
A method for performing downhole gas lift operations, comprising:
- coupling a gas lift valve to a tubing, wherein the gas lift valve comprises an actuator, a flow control member disposed in the actuator, and a closure member that is initially in an open position;
- injecting a gas downhole and exterior to the tubing;
- urging the gas to enter the tubing via the gas lift valve;
- and
- creating a sufficient pressure differential across the gas lift valve to move the actuator, thereby causing the closure member to close the gas lift valve.
A method for performing downhole gas lift operations, comprising:
- coupling a gas lift valve to a tubing, wherein the gas lift valve comprises an actuator, a flow control member disposed in the actuator, and a closure member that is initially in an open position;
- injecting a gas downhole and interior to the tubing;
- urging the gas to exit the tubing via the gas lift valve;
- and
- creating a sufficient pressure differential across the gas lift valve to move the actuator, thereby causing the closure member to close the gas lift valve.
A valve for controlling fluid flow, comprising:
- a housing having a bore in fluid communication with an inflow port and an outlet port;
- a closure member configured to close fluid communication through the bore;
- a flow tube movable between an extended position and a retracted position;
- and
- a flow control device disposed in the flow tube, wherein when in the extended position, the flow tube retains the closure member in an open position, and wherein the flow tube is movable to the retracted position in response to a predetermined pressure differential across the bore.
Dependencies are inferred from the claim text.