RF transmission line and drill/pipe string switching...

Details RF transmission line and drill/pipe string switching... RF transmission line and drill/pipe string switching...

2007-08-14

2007-08-14

Wong, Albert K. (Department: 2612)

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

C340S854500, C367S082000, C455S041200, C455S041300, C455S106000

Reexamination Certificate

active

10872054

ABSTRACT:
A modulated reflectance well telemetry apparatus having an electrically conductive pipe extending from above a surface to a point below the surface inside a casing. An electrical conductor is located at a position a distance from the electrically conductive pipe and extending from above the surface to a point below the surface. Modulated reflectance apparatus is located below the surface for modulating well data into a RF carrier transmitted from the surface and reflecting the modulated carrier back to the surface. A RF transceiver is located at the surface and is connected between the electrically conductive pipe and the electrical conductor for transmitting a RF signal that is confined between the electrically conductive well pipe and the electrical conductor to the modulated reflectance apparatus, and for receiving reflected data on the well from the modulated reflectance apparatus.

REFERENCES:
patent: 4939325 (1990-07-01), Wendel et al.
patent: 6434372 (2002-08-01), Neagley et al.
patent: 6898149 (2005-05-01), Hill et al.
U.S. Appl. No. 10/187,025, filed Jun. 28, 2002, Scott Briles.

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