DOWNHOLE ELECTRIC PLUNGER PUMP Russian patent published in 2017 - IPC F04B47/06 

FIELD: oil and gas industry.

SUBSTANCE: downhole electric plunger pump includes an electric motor, a reducer, a rod, a cylinder and a hollow plunger, made with a closed series of internal helical grooves. Pin-key reciprocates in grooves, freely rotating in slot of nut with bores. The nut is rigidly articulated with a rod, which is connected to electric motor reducer. At the top, cylinder is provided with a guide slot in which a guide pin, fixed to the upper part of hollow plunger, is moving. In the lower part, the hollow plunger is articulated with a dischange valve.

EFFECT: rodless operation of deep plunger pump, lack of beam unit.

4 dwg