MULTISTAGE IMMERSION VIBRATORY PUMP WITH AXIAL CONNECTION Russian patent published in 2014 - IPC F04F7/00 

FIELD: engines and pumps.

SUBSTANCE: device housing consists in section cases 1, 2. Pump section has inlet valve 3 with its own body. Disc piston 5 is fitted at rod 6 engaged with electromagnet armature 7 integrated with vibrator. Plate spring 9 is used as the armature return mechanism arranged in oil-filled chamber 10 to compensate for external pressure. Pump sections are interconnected by pipelines 11. Upper outlet part of pipeline 11 features the shape of diffuser 12 accommodating the inlet of inlet valve of the next pump section. Inlet valve of every section has intrinsic body threaded to pump section housing to allow the suction chamber volume. Seat with ball is fitted in the valve body. Electromagnet windings and control signals are fed via multiple-strand armoured cable 17.

EFFECT: lift of formation fluid from 3 km deep wells, power savings.

3 cl, 2 dwg