FIELD: measuring techniques.
SUBSTANCE: invention can be used for nuclear magnetic well logging. The nuclear magnetic logging device for surveying a slim hole well has a direct current source, an amplifier, a switch, a main inductance coil connected through the switch to the direct current source. The device also has at least two additional inductance coils, connected in pairs and in series with the main inductance coil, lying symmetrically about its middle point, with their inputs connected to the main inductance coil through the switch, and their outputs - to the amplifier.
EFFECT: increased overall Q-factor of the measuring circuit, reduced noise level, increased reliability and accuracy of measuring the signal.
2 cl, 3 dwg
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