Compliance telemetry

摘要

A communication system for communicating information with a compliant medium is disclosed, the communication device includes a constrained fluid, a valve, a modulator, a sensor and a demodulator. The constrained is fluid distributed along a length. The valve is configured to operatively engage a second point relative to the length. The modulator configured to actuate the valve according to information. The sensor configured to measure pressure at a first point relative to the length, where the first point is distant from the second point. The demodulator is coupled to the sensor to recover the information.

主权项

1. A method for transmitting information with a compliant medium in a wellbore extending below ground from a surface location, the compliant medium comprising a wire extending from a first point which is at the surface to a second point which is below ground and onwards towards a termination below ground, the method comprising steps of:
biasing the wire, wherein the biasing is performed by applying tension to the wire at the first point which is at the surface; intermittently gripping the wire at the second point which is below ground so as to restrain the wire at the second point against displacement by the applied tension, wherein:
the first point is distant from the second point, andthe intermittent gripping modulates information onto the wire; making measurements of one of a magnitude of displacement or a rate of displacement of the wire at the first point which is at the surface, in response to the applied tension, so as to observe changes in compliance of the wire resulting from the intermittent gripping of the wire at the second point, and recovering the information from the measurements.