Patent ID: 7647975

Claim:
An apparatus usable with a well, comprising: a gas lift valve comprising a check valve element located between an annulus and a passageway of a tubing, the check valve element adapted to selectively allow a flow through the check valve element from an inlet side of the check valve element to an outlet side of the check valve element and biased to prevent a leakage flow through the check valve element from the outlet side to the inlet side; and an isolation member adapted to: be run downhole in a first state in which the isolation member isolates the outlet of the check valve element from a fluid pressure exerted by fluid in the annulus or the passageway to prevent the leakage flow, and in response to a magnitude of the fluid pressure exceeding a threshold, transition to a second state in which the isolation member allows communication of the fluid pressure through the isolation member regardless of the magnitude of the fluid pressure, wherein the check valve is oriented such that the isolation member is located on the outlet side of the check valve.