WHIPSTOCK SPINDLE Russian patent published in 1999 - IPC

FIELD: drilling equipment. SUBSTANCE: this relates to drilling intervals of bore-hole deviation in zenith angle and azimuth. It is also used for drilling up new side bore-holes and bore-holes in emergency cases. Whipstock spindle has sections of screw working pair and spindle section which is made up of upper part with installed set of axial and radial supports and lower extension. Their shafts are interconnected by cam half-couplings having thrust end-faces for transmitting axial thrust. Radial support of extension is seated in nipple nut. Application of aforesaid embodiment of whipstock spindle allows for enhancing efficiency of drilling directed bore-holes due to intensive reaction to azimuth angle. EFFECT: higher efficiency. 2 dwg