Downhole communication

Details Downhole communication Downhole communication

2005-11-17

2009-06-30

Edwards, Jr., Timothy (Department: 2612)

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

C340S854400, C340S855800, C166S250150, C166S242100, C166S242600

Reexamination Certificate

active

07554458

ABSTRACT:
Methods of and apparatus for a downhole communication in a well. The well has a metallic structure which includes an insulated metallic, fluid carrying, control line. The method comprises the steps of applying signals to the control line at a first location and extracting the signals from the control line at a second location.There is also provided a downhole communication system for use in a well having a metallic structure. The metallic structure includes an insulated metallic, fluid carrying, control line. The system comprises means for applying signals to the control line at a first location and means for extracting the signals from the control line at a second location. The control line acts as a signal channel.Other methods and apparatus making use of control line carrying no fluid and/or the metallic shielding of cable having insulated metallic shield are also described.

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