Remotely operated isolation valve

A well system, comprising:

• an isolation valve which selectively permits and prevents fluid communication between sections of a wellbore;
• a signal transmitter which transmits a signal, the signal transmitter being positioned remotely from the isolation valve;
• the isolation valve including a detector section which detects the signal;
• and
• the isolation valve further including a control system which operates an actuator of the isolation valve in response to detection of the signal by the detector section.

A well system, comprising:

• an isolation valve which selectively permits and prevents fluid communication between sections of a wellbore;
• the isolation valve being interconnected in a tubular string;
• and
• the tubular string being cemented in the wellbore, with cement being disposed in an annulus formed radially between the isolation valve and the wellbore.