Boring or penetrating the earth – With signaling – indicating – testing or measuring
Reexamination Certificate
2005-08-09
2005-08-09
Bagnell, David (Department: 3672)
Boring or penetrating the earth
With signaling, indicating, testing or measuring
C175S320000, C340S854600
Reexamination Certificate
active
06926098
ABSTRACT:
Devices and methods for incorporating a gap sub assembly into a drill string to electrically isolate portions of a transmitter assembly within, for example, an MWD tool located within the drill string. The gap sub assembly incorporates upper and lower subs having an insulated interconnection. A central conductor assembly is axially disposed within the lower sub and does not extend through the length of the gap sub. The central conductor assembly is used to transmit electrical power and data across the gap sub assembly between the upper portions of the drill string and transmitter components housed within the MWD tool disposed below the gap sub assembly.
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Bagnell David
Baker Hughes Incorporated
Madan Mossman & Sriram P.C.
Thompson K.
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