Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Reexamination Certificate
2007-07-10
2007-07-10
Patidar, Jay M. (Department: 2862)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
C324S367000
Reexamination Certificate
active
10844173
ABSTRACT:
A resistivity tool for investigating a wall of a borehole drilled with a non-conductive mud includes a tool body adapted to be incorporated in a logging-while-drilling tool assembly; a resistivity sensor disposed on the tool body, wherein the resistivity sensor comprises a sensor pad supporting a current injector electrode, a current return electrode, and an array of measurement electrodes, and a circuitry for controlling current injection from the current injector electrode and for measuring voltage difference between electrodes in the array of measurement electrodes, wherein the current injector electrode and the current return electrode are disposed near opposite ends of the sensor pad and the array of measurement electrodes is disposed between the current injector electrode and the current return electrode, wherein the sensor pad is constructed of an insulating material and includes a conductive shielding member, or wherein the sensor pad is constructed of a conducting material and includes insulating sections around the electrodes.
REFERENCES:
patent: 2712629 (1955-07-01), Doll
patent: 2961600 (1960-11-01), Tanguy
patent: 3017566 (1962-01-01), Schuster
patent: 3132298 (1964-05-01), Dumanoir et al.
patent: 3462678 (1969-08-01), Eaton
patent: 3818324 (1974-06-01), Espinasse
patent: 3973181 (1976-08-01), Calvert
patent: 4361808 (1982-11-01), Kern et al.
patent: 4468623 (1984-08-01), Gianzero et al.
patent: 4511842 (1985-04-01), Moran et al.
patent: 4567759 (1986-02-01), Ekstrom et al.
patent: 4738812 (1988-04-01), Raynal
patent: 4962707 (1990-10-01), Claussen
patent: 5235285 (1993-08-01), Clark et al.
patent: 5339037 (1994-08-01), Bonner et al.
patent: 6173793 (2001-01-01), Thompson et al.
patent: 6191588 (2001-02-01), Chen
patent: 6230557 (2001-05-01), Ciglenec et al.
patent: 6564883 (2003-05-01), Fredericks et al.
patent: 6600321 (2003-07-01), Evans
patent: 2002/0062992 (2002-05-01), Fredericks et al.
patent: 2003/0173968 (2003-09-01), Cheung et al.
patent: 2003/0222651 (2003-12-01), Tabanou
patent: 2 130 379 (1984-05-01), None
patent: 2 391 070 (2004-01-01), None
patent: 2 401 185 (2004-11-01), None
patent: WO 01/77710 (2001-10-01), None
patent: WO 01/77711 (2001-10-01), None
Cheung Philip
Hayman Andrew J.
Gaudier Dale V.
McEnaney Kevin P.
Patidar Jay M.
Schlumberger Technology Corporation
White Bryan L.
LandOfFree
Formation imaging while drilling in non-conductive fluids does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Formation imaging while drilling in non-conductive fluids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation imaging while drilling in non-conductive fluids will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3734571