Borehole telemetry system

Details Borehole telemetry system Borehole telemetry system

2011-08-09

2011-08-09

Edwards, Jr., Timothy (Department: 2612)

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

C340S853400, C367S081000, C367S083000

Reexamination Certificate

active

07994932

ABSTRACT:
An acoustic telemetry apparatus and method for communicating encoded digital data from a down-hole location through a borehole to the surface is described including an acoustic channel terminated at a down-hole end by a reflecting terminal (133, 134), an acoustic wave generator (140) located at the surface and providing an acoustic wave carrier signal through said acoustic, channel, a modulator (162, 163) located down-hole to modulate amplitude and/or phase of said carrier wave in response to an encoded digital signal and one or more sensors (150) located at the surface adapted to detect amplitude and/or phase related information of acoustic waves traveling within said acoustic channel to determine the encoded digital data.

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