ELECTRIC DEEP PUMPING PLANT Russian patent published in 1999 - IPC

FIELD: lifting of fluids from deep wells. SUBSTANCE: electric deep pumping plant includes hydraulic pump with hydraulic motor placed in one housing under electric motor and having one shaft. Hydraulic motor is manufactured in the form of piston of hydraulic pump and is fitted with valve controlling motion of working fluid. Well pump has plunger located under electric motor. It is provided with spring of back stroke of plunger, thrust bearing in space of plunger and non-return valve in inlet chamber. Shaft of electric motor has spline grooves and links shaft of hydraulic pump with plunger via thrust bearing. EFFECT: increased operational efficiency of pumping plant. 1 dwg