G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/18 (2006.01) E21B 47/026 (2006.01) G01V 3/20 (2006.01)
Patent
CA 2081785
A disclosed embodiment utilizes one or more toroidal coil antennas mounted, in an insulating medium, on a drill collar to induce currents which travel in a path that includes the drill collar and earth formations around the drill collar. At least one array of electrodes is provided on at least one stabilizer blade of the drill collar and is utilized to detect currents transmitted by toroidal coil antennas which return via the formations to the electrodes laterally; that is, approximately normal to the axis of the drill collar. Signal traces are obtained from measurements taken at respective ones of the transducers, and a dip characteristic of the formations is determined from the signal traces and from signals representing the rotational orientation of the drill collar.
Bonner Stephen D.
Clark Brian
Jundt Jacques
Luling Martin
Rosthal Richard A.
Schlumberger Canada Limited
Smart & Biggar
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