BOREHOLE DEVICE FOR MEASURING THE ELECTRICAL CONDUCTIVITY AND MAGNETIC SUSCEPTIBILITY OF ROCKS Russian patent published in 2021 - IPC G01V3/28 

FIELD: geophysical exploration.

SUBSTANCE: invention relates to geophysical studies of wells during field exploration at operating mining enterprises, measuring the magnetic susceptibility and electrical conductivity of the studied array. Essence: the device contains a second generator coil and a second receiving coil, wound respectively on top of the first generator and first receiving coils, two band-pass amplifiers, the first and second generators of a multipolar current, two variable resistors, the third and fourth phase shifters. The signal voltages from the resistors are fed through the third and fourth phase shifter to the inputs of the first and second receiving coils, the outputs of which are connected to the inputs of the first and second bandpass amplifiers. The outputs of the multipolar current generators are connected to the first and second generator coils, and their inputs are connected to the corresponding generator outputs via analog switches. The control unit alternately connects the inputs of the multipolar current shapers to the signals of the 300 Hz and 30 kHz master generator, and also controls the inputs and operation of the ADC.

EFFECT: expansion of the range of systems for measuring electrical conductivity and magnetic susceptibility of rocks.

1 cl, 2 dwg