Well logging tool for bore hole investigations

Details Well logging tool for bore hole investigations Well logging tool for bore hole investigations

1993-05-07

1994-07-26

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using well logging device

324300, G01R 3320

Patent

active

053329678

ABSTRACT:
The invention concerns a nuclear resonance well logging tool for insertion into a borehole with a permanent magnet which is magnetized perpendicularly to its axis and with means to transmit and to detect high frequency signals whereby the transmission and detection coils are orthogonal. The arrangement is configured for CW operation. The permanent magnet or the transmission and detection coil arrangement may rotate around the axis in order to modulate the nuclear resonance signals.

REFERENCES:
patent: 3617867 (1971-11-01), Herzog
patent: 4717877 (1988-01-01), Taicher et al.
patent: 5280243 (1994-01-01), Miller

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