Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Reexamination Certificate
2006-07-11
2006-07-11
Thompson, Kenneth (Department: 3672)
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Indicating, testing or measuring a condition of the formation
C166S254200
Reexamination Certificate
active
07073609
ABSTRACT:
A resistivity logging sensor for logging while drilling a well using an oil-based mud includes a sensor body; a first current injector electrode disposed on the sensor body, wherein the first current injector electrode is electrically insulated from the sensor body; at least two current return electrodes disposed on the sensor body at a selected distance from the first current injector electrode, wherein the at least two current return electrodes are disposed proximate to each other and are electrically insulated from the sensor body; and an electrical source configured to energize the first current injector electrode with a current having a voltage of no less than 50 mvolts and a frequency of no less than 1 KHz.
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Omeragic Dzevat
Pisoni Attilio C.
Seydoux Jean
Tabanou Jacques R.
McEnaney Kevin P.
Schlumberger Technology Corporation
Segura Victor H.
Thompson Kenneth
White Bryan L.
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