SPINDLE OF BOTTOM-HOLE MOTOR Russian patent published in 1999 - IPC

FIELD: drilling machinery and equipment. SUBSTANCE: this relates to drilling bore-holes by means of bottom-hole motors and particularly and particularly relates to lower supporting units such as spindles. Spindle has body, shaft, axial support and radial support. Axial and radial supports are located relative to each other with at least partial axial overlapping at different sides of body. One of supports is located inside body, other support is located outside. Embracing part of external support is included in shaft assembly. Internal part is included in body assembly. Application of aforesaid embodiment of bottom-hole motor spindle ensures efficient control of preset trajectory of bore-hole at drilling within wide range of intensive deviation. This is achieved due to reduced length of lower part of motor by wise positioning of supports relative to each other. EFFECT: higher efficiency. 4 cl, 3 dwg