SPINDLE OF SCREW DOWNHOLE MOTOR Russian patent published in 2020 - IPC E21B4/02 E21B7/08 

FIELD: soil or rock drilling.

SUBSTANCE: invention relates to drilling equipment and is intended for use in spindle structures in order to increase reliability of their operation. Spindle of screw downhole motor includes housing made of interconnected tubular upper part and lower part, installed in radial upper and lower supports spindle shaft, located in axial bearing and connected to cardan shaft, ends of which are connected to upper and lower casings of cardan shaft, spindle gear shaft axis deflection angle regulator. On the conical end of the upper part of the body there is a thread for connection of the spindle to the screw motor section, inside this conic end a cylindrical cavity is formed. At the end of lower part of spindle shaft thread is made for connection with bit. Lower part of the casing performing the functions of the lower sub is elongated so that in this part of the casing the axial support, radial supports, spindle shaft, ends of the deflection angle controller and cardan shaft with the lower support of the cardan shaft are located. Upper housing of the cardan shaft is located in the upper part of the housing performing the function of the upper sub. Upper and lower parts of the spindle housing are connected to the tubular housing of the deflection angle controller, on which the ring of the rerun control valve is located between ends of the upper and lower parts of the spindle housing. End of the upper housing of the cardan shaft is located in the cylindrical cavity of the upper part of the housing. Deflection controller is made with external thread on upper and lower ends connected to threaded ends of upper and lower parts of housing. Improved spindle reliability is provided.

EFFECT: spindle of screw downhole motor is proposed.

3 cl, 3 dwg