Method and apparatus for directional drilling in underground rock formations

摘要

A drilling tool with direct bit drive for deep bores, with a straight tubular housing and a motor arranged on it comprises an output shaft, connected to the rotor of the motor and mounted in the housing, and a rotary drill bit at the bottom output-shaft end coming out of the housing. The axis of rotation of this output shaft is orientated at an angle to the axis of the housing.