SUBMERSIBLE DOUBLE SCREW ELECTRIC PUMP Russian patent published in 2002 - IPC

FIELD: oil producing industry. SUBSTANCE: invention is used in screw pumps producing high-viscosity oil and in drilling rings. Screw transmitting torque from electric motor through reduction gear is connected with eccentric clutch housing by means of two steel bushings of height less than or equal to half of pitch of screw working surface and inner surface follows the surface of screw. Bushings enclose edge of screw and they are installed together with screw in eccentric clutch housing first bushing is connected with screw provided with flat by key, and second bushing is connected with eccentric clutch housing by key. Both bushings are pressed from end face to inner end face surface of eccentric clutch housing by clamping bushing and locking ring. EFFECT: provision of low-yield high-pressure pump with balanced system, with improved reliability and preservation of technology of assembling owing to increased eccentricity and reduced screw speeds at equal strength of connection of screw and eccentric clutch housing. 4 cl, 2 dwg