Apparatus for wellbore communication

Details Apparatus for wellbore communication Apparatus for wellbore communication

2008-08-19

2010-06-08

Neuder, William P (Department: 3672)

Boring or penetrating the earth

With signaling, indicating, testing or measuring

C175S048000

Reexamination Certificate

active

07730968

ABSTRACT:
Methods and apparatus for communicating between surface equipment and downhole equipment. One embodiment of the invention provides a wellhead assembly that allows electrical power and signals to pass into and out of the well during drilling operations, without removing the valve structure above the wellhead. Another embodiment of the invention provides an electromagnetic casing antenna system for two-way communication with downhole tools. Another embodiment of the invention provides an antenna module for a resistivity sub that effectively controls and seals the primary/secondary interface gap.

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Downhole Deployment Valve Bulletin, Weatherford International Ltd. (online), Jan. 2003, p. 1.
Nimir Field in Omar Proves the Downhole Deployment Valve a Vital Technological Key to Success, Weatherford International Inc., 2003, p. 1.

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