Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Reexamination Certificate
2005-05-17
2005-05-17
Deb, Anjan K. (Department: 2858)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
C324S355000, C324S357000
Reexamination Certificate
active
06894499
ABSTRACT:
The invention relates to a device for measuring an electrical parameter through electrically-conductive casing, said device including a current injection electrode (3) and a measurement electrode (7) on one side of the wall of the casing (1). According to the invention, the injection electrode (3) is associated via a first magnetic coupler (4) with a current source (2) and the measurement electrode (7) is associated via a second magnetic coupler (6) with a measurement device (5) situated on the other side of the wall.
REFERENCES:
patent: 4901023 (1990-02-01), Vail, III
patent: 5642051 (1997-06-01), Babour et al.
patent: 6064210 (2000-05-01), Sinclair
patent: 6633164 (2003-10-01), Vinegar et al.
patent: 2 338 253 (1999-12-01), None
patent: WO 0041006 (2000-07-01), None
Dumont Alain
Renoux Nicolas
Salamitou Philippe
Deb Anjan K.
Echols Brigitte L.
Salazar Jennie
Schlumberger Technology Corporation
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