OIL-WELL ELECTRIC PLUNGER PUMP Russian patent published in 2001 - IPC

FIELD: oil producing industry; pumps for oil wells. SUBSTANCE: pump consists of electric motor, reversible transfer mechanism and plunger pump. Rotation of electric motor shaft is transmitted through gear trains to two similar parallel wheels of last stage. These wheels have common axle of rotation, equal gear rations from wheels to electric motor shaft and they are mounted on separate axle on bearings together with common tenon and connecting rod, thus playing the part of paired crank mechanism converting rotation of last stage wheels into reciprocating motion of plunger pump movable part. EFFECT: provision of pump with low plunger of pump with low plunger stroke frequency. 1 dwg