Electromagnetic wellbore telemetry system for tubular strings

Details Electromagnetic wellbore telemetry system for tubular strings Electromagnetic wellbore telemetry system for tubular strings

2006-07-10

2009-10-20

Wong, Albert K (Department: 2612)

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

C340S854600, C439S191000, C174S047000, C367S082000

Reexamination Certificate

active

07605715

ABSTRACT:
A coaxial transmission line for an electromagnetic wellbore telemetry system comprises an outer conductive pipe, an inner conductive pipe disposed coaxially inside an axial bore of the outer conductive pipe, a first electrical contact having a first contact face disposed at a first end of the inner conductive pipe, a second electrical contact having a second contact face disposed at a second end of the inner conductive pipe, wherein at least one of the first and second contact faces includes at least one slot, and an insulator disposed between the outer conductive pipe and the inner conductive pipe.

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