FIELD: mining.
SUBSTANCE: method for zenith angle and drift direction determination by gyroscopic inclinometer is proposed. It consists in continuous measuring of stress proportional to angle of platform stabilisation error upon initial azimuthal orientation of gyroscopic inclinometer and upon movement of well-logging tool in well. Obtained stress is used for determination of angular rate by angular rate sensor sensitivity axis without errors from angle of stabilisation error. The angular rate is used for estimation of azimuth angle of accelerometer sensitivity axes at the moment of completion of initial azimuthal orientation. For implementation of proposed method developed is a device in which additional output connected to additional channel of data processing introduced in digital processing unit is introduced in electric circuit of platform stabilisation channel amplifier.
EFFECT: improving accuracy of path of extended inclined and horizontal wells determination.
3 cl, 1 dwg
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|---|---|---|---|
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