Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Reexamination Certificate
2008-06-17
2008-06-17
Assouad, Patrick J. (Department: 2862)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
C324S355000, C324S370000, C324S375000
Reexamination Certificate
active
07388382
ABSTRACT:
An instrument is disclosed for measuring resistivity of Earth formations from within a conductive pipe inside a wellbore drilled through the formations. The instrument includes a plurality of housings connected end to end and adapted to traverse the wellbore. At least one electrode is disposed on each housing. Each electrode is adapted to be placed in electrical contact with the inside of the pipe. The instrument includes a source of electrical current, a digital voltage measuring circuit and a switch. The switch is arranged to connect the source of electrical current between one of the electrodes and a current return at a selectable one of the top of the pipe and a location near the Earth's surface at a selected distance from the top of the pipe, and to connect selected pairs of the electrodes to the digital voltage measuring circuit. The pairs are selected to make voltage measurements corresponding to selected axial distances and selected lateral depths in the Earth formations.
REFERENCES:
patent: 2459196 (1949-01-01), Stewart
patent: 2729784 (1956-01-01), Fearon
patent: 2891215 (1959-06-01), Fearon
patent: 4524325 (1985-06-01), Moore et al.
patent: 4532614 (1985-07-01), Peppers
patent: 4600356 (1986-07-01), Bridges et al.
patent: 4796186 (1989-01-01), Kaufman
patent: 4820989 (1989-04-01), Vail, III
patent: 4837518 (1989-06-01), Gard et al.
patent: 4857831 (1989-08-01), Davies et al.
patent: 4882542 (1989-11-01), Vail, III
patent: 5043668 (1991-08-01), Vail, III
patent: 5075626 (1991-12-01), Vail, III
patent: 5223794 (1993-06-01), Vail, III
patent: 5510712 (1996-04-01), Sezginer et al.
patent: 5543715 (1996-08-01), Singer et al.
patent: 5563514 (1996-10-01), Moulin
patent: 5570024 (1996-10-01), Vail, III
patent: 5608323 (1997-03-01), Koelman
patent: 5633590 (1997-05-01), Vail, III
patent: 5654639 (1997-08-01), Locatelli et al.
patent: 5680049 (1997-10-01), Gissler et al.
patent: 5809458 (1998-09-01), Tamarchenko
patent: 5960370 (1999-09-01), Towle et al.
patent: 5987385 (1999-11-01), Varsamis et al.
patent: 6025721 (2000-02-01), Vail, III
patent: 6025722 (2000-02-01), Evans et al.
patent: 6157195 (2000-12-01), Vail, III
patent: 6246240 (2001-06-01), Vail, III
patent: 6501276 (2002-12-01), Bosnar
patent: 6603314 (2003-08-01), Kostelnicek et al.
patent: 6667621 (2003-12-01), Benimeli
patent: 6975121 (2005-12-01), Strack et al.
patent: 2001/0033164 (2001-10-01), Vinegar et al.
patent: 2001/0038287 (2001-11-01), Amini
patent: 2002/0062992 (2002-05-01), Fredericks et al.
patent: 2002/0105333 (2002-08-01), Amini
patent: 2003/0038634 (2003-02-01), Strack
patent: 2003/0042016 (2003-03-01), Vinegar et al.
patent: 2006/0028208 (2006-02-01), Strack et al.
Rueter Horst
Strack Kurt M.
Assouad Patrick J.
Fagin Richard A
KJT Enterprises, Inc.
Schindler David M.
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