GYROINCLINOMETER Russian patent published in 1997 - IPC

FIELD: instruments for determination of the spatial position of the axis of drilled wells. SUBSTANCE: gyroinclinometer ground surface apparatuses and downhole instrument. Downhole instrument includes free gyro, units of multicomponent accelerometer and two-component gyro transducer of angular velocity. Under conditions of adjustment, analytic gyrocompassing is carried out with immovable instrument and with help of units of accelerometer and transducer of angular velocity, and computer included in the ground surface apparatuses. In so doing, the azimuth of the main axis free gyro is determined whose value is used in operation of gyroinclinometer in conditions of motion. To reduce error in determination of the azimuth of inclination plane under conditions of adjustment, the information coming from units of multicomponent accelerometer and two-component gyro transducer of angular velocity is analyzed by analyzer unit. In case of failure of information repetition, the analyzer controls the two-channel switch member which prevents such information from entering the computer. EFFECT: higher efficiency. 1 dwg