System and method for determining downhole conditions

Wells – Processes – With indicating – testing – measuring or locating

Reexamination Certificate

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Details

C166S051000, C166S066000, C166S227000, C166S278000

Reexamination Certificate

active

10868695

ABSTRACT:
The present invention provides a system for determining downhole conditions including a time domain reflectometer (172) that is operable to generate a transmission signal and receive a reflected signal. A tubular (192) is positioned downhole in a downhole medium (214, 216, 218, 220, 222) and a waveguide (186), which is in electrical communication with the time domain reflectometer (172), is operably contacting the downhole (214, 216, 218, 220, 222). The waveguide (186) is operable to propagate the transmission signal and operable to propagate the reflected signal that is generated responsive to an electromagnetic property of the downhole medium (214, 216, 218, 220, 222).

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Dowding et al.; Real Time Monitoring of Infrastructure using TDR Technology; Structural Materals Technology NDT Conference 2000; 8 pages.
‘Time Domain Reflectometry’; Campbell Scientific; 4 pages.
‘Time-Domain Reflectometry’; 4 pages.

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