Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Patent
1987-06-10
1989-06-13
Kyle, Deborah L.
Communications: electrical
Wellbore telemetering or control
Using a specific transmission medium
340855, 166250, 175 40, G01V 100
Patent
active
048396443
ABSTRACT:
A system and method are disclosed for wireless two-way communication in a cased borehole having tubing extending therethrough. A downhole communications subsystem is mounted on the tubing. The downhole subsystem includes a downhole antenna for coupling electromagnetic energy in a TEM mode to and/or from the annulus between the casing and the tubing. The downhole subsystem further includes a downhole transmitter/receiver coupled to the downhole antenna, for coupling signals to and/or from the antenna. An uphole communications subsystem is located at the earth's surface, and includes an uphole antenna for coupling electromagnetic energy in a TEM mode to and/or from the annulus, and an uphole receiver/transmitter coupled to the uphole antenna, for coupling the signals to and/or from the uphole antenna. In accordance with a feature of the invention, the annulus contains a substantially non-conductive fluid (such as diesel, crude oil, or air) in at least the region of the downhole antenna and above.
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McBride Roger W.
Safinya Kambiz A.
Eldred J. Woodrow
Kyle Deborah L.
Lee Peter
Novack Martin
Schlumberger Technology Corp.
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