Remotely operated isolation valve

摘要

A method of operating an isolation valve can include continuously transmitting a signal to a detector section, and a control system operating an actuator in response to the detector section detecting cessation of the signal transmission. A well system can include an isolation valve which selectively permits and prevents fluid communication between sections of a wellbore, a remotely positioned signal transmitter, and the isolation valve including a control system which operates an actuator in response to detection of a signal by a detector section. Another well system can include an isolation valve interconnected in a tubular string, and the tubular string being cemented in a wellbore, with cement being disposed in an annulus formed radially between the isolation valve and the wellbore.

主权项

1. A method of operating an isolation valve in a subterranean well, the method comprising:
interconnecting the isolation valve between ends of a casing string located in the wellbore; continuously transmitting a signal to a detector section of the isolation valve; and energizing an actuator of the isolation valve via a control system in response to the detector section detecting that continuous transmission of the signal has ceased.