Logging tool having shielded triaxial antennas

Details Logging tool having shielded triaxial antennas Logging tool having shielded triaxial antennas

E - Fixed Constructions

21

B

E21B 47/00 (2006.01) E21B 47/12 (2006.01)

Patent

CA 2701680

The present invention relates to a downhole logging tool having on its tool body a set of co-located antennas, one or more additional antennas spaced longitudinally apart from the set of co-located antennas, an electromagnetically transparent shield circumferentially surrounding the set of co-located antennas, and an electromagnetically transparent shield circumferentially surrounding each of the one or more additional antennas. The downhole logging tool may be a wireline or while-drilling tool, and it may be an induction or propagation tool. The shields may have slots that are locally perpendicular to the windings of underlying coil antennas.

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