FIELD: physics; mining.
SUBSTANCE: proportionality coefficient is evaluated by ratio of radial component and extraneous magnetic field angular component gradient variations in varying magnetisation of packed-hole assembly. Magnetic field components are measured twice in one well point at various magnetisation of packed-hole assembly, e.g. before and after adding. Radial component is measured with axial magnet-sensitive sensor (MS). Angular component gradient is measured with additional MS connected in gradiometer circuit and arranged within the plane perpendicular to the inclinometer axis. Corrections to axial MS reading are determined by multiplying angular component gradient by correcting factor.
EFFECT: improved correction of ferromagnetic field exposure in azimuth measurement.
| Title | Year | Author | Number |
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| INCLINOMETER | 1998 |
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| SELF-SUSTAINING INCLINOMETER | 0 |
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SU1146425A1 |
