FIELD: mining.
SUBSTANCE: in compliance with first version, borehole tractor comprises two draw blocks including cylindrical bodies connected by coupling and propulsors. Propulsors include screw with kinematic thread coupled via turn-slide levers with studded press-on bush to interact with the screw, and buffer bush via two parallel levers. Buffer bush comprises spring-loaded brake shoes and is fitted on the screw by its central opening. Lengthwise grooves are made in said bodies to accommodated press-on bush studs, buffer bush shoes and riffled slips with turn-slide levers to be displaced over the screw. Said bodies accommodate reversible motors to transmit torque via magnetic coupling arranged in sealed shell to screws. Motors are interconnected and connected with the surface logging cable control station.
EFFECT: higher reliability of instruments delivery into horizontal wells.
5 cl, 2 dwg
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