UNIT OF PRIMARY CONVERTERS OF BOREHOLE MAGNITOMETER-INCLINOMETER Russian patent published in 1996 - IPC

FIELD: geophysics. SUBSTANCE: invention is intended for determination of spatial position of hole within large range of zenith angles, unit of primary converters includes three stationary ferroprobes rigidly anchored in case of down-hole logging instrument, rotary frame with weight arranged eccentrically, pendulum with coil vertically put on its axis, system of three mutually orthogonal output coils. Coil anchored on pendulum can turn about its axis through 360 deg and is inductively coupled to A.C. generator which makes it possible to exclude axial collector of rotary frame, to enhanced accuracy of its orientation and to enlarge range of zenith angles. System of three single coils enables accuracy of computation of zenith angle and turn angle of case relative to inclination plane to be enhanced. EFFECT: enhanced accuracy of orientation and of computation of zenith angles. 1 dwg