FIELD: drilling equipment. SUBSTANCE: this is intended for control of driving incline-directed wells. System is provided with cable adapter which ensures hermetic introduction of cable in drill string. This allows for extending drilling tool in usual manner without removing bottom-hole measuring unit. Design of setting adapter permits quick and accurate seating and orientation of measuring unit. Measuring unit accommodates gyroscope with magnetic suspension of rotor in function of sensor of three values - deflector setting angle, zenith angle and azimuth of well and this substantially simplifies entire bottom-hole unit and reduces its overall dimensions. EFFECT: high efficiency. 3 dwg
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