HYDRAULIC SUBMERSIBLE PUMP WITH ELECTRIC MOTOR DRIVE

摘要

A hydraulic submersible pump with electric motor drive including a master cylinder and at least one slave cylinder in axial alignment with the master cylinder, each having a piston. Each slave piston is connected by a rigid linkage to the master piston, such that movement of the master piston results in movement of each of the slave pistons. Hydraulic fluid is driven through hydraulic fluid conduits by a hydraulic pump selectively supply hydraulic fluid to and draws hydraulic fluid from different portions of the master cylinder. An intake port with a one way valve is on the at least one slave cylinder permits entry of well fluids from the well into the at least one slave cylinder via the intake port and preventing well fluids from exiting the at least one slave cylinder via the intake port. An exhaust port controlled by a one way exhaust valve is on the at least one slave cylinder adapted to be connected by conduit to surface. An electric motor drives the hydraulic pump.