Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Reexamination Certificate
2008-03-26
2011-10-04
Patidar, Jay (Department: 2858)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
Reexamination Certificate
active
08030938
ABSTRACT:
An apparatus for imaging a subsurface material traversed by a borehole, the apparatus including an imaging pad deployed by a logging instrument, the pad including a plurality of measuring sets, each measuring set including a first current injector electrode, a second current injector electrode, a pair of sensor electrodes disposed between the first current injector electrode and the second current injector electrode, and an output for coupling to an electronics unit adapted for producing the imaging of the subsurface material.
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International Search Report for International Application No. PCT/US2009/038267. Mailed Nov. 11, 2009.
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Cheung, Philip; Hayman, Andrew; Laronga, Rob; Cook, Greg; Flournoy, Greg; Goetz, Peter; Hansen, Steve; Lamb, Malcolm; Li, Bingjian; Larsen, Mark; Orgren, Mark; and Redden, Jim (Schlumberger et al). A Clear Picture in Oil-Base Muds. Oilfield Review, Winter 2001/ 2002, V. 13, No. 4.
Beard David R.
Bespalov Alexandre N.
Gold Randy
Itskovich Gregory B.
Wang Tsili
Baker Hughes Incorporated
Cantor & Colburn LLP
Patidar Jay
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