Oil-submersible linear motor oil extraction system

A submersible linear motor oil pumping system, comprising:

• a submersible linear motor, an oil pump, a sealing device, and a balance assembly, which are disposed underground;
• wherein the submersible linear motor comprises a stator and a mover that moves reciprocally inside the stator;
• wherein the oil pump comprises a barrel, a piston, an outer sleeve, and an oil feeding sieve tube, the barrel is positioned in the outer sleeve, the piston is connected to an upper end of the mover and is reciprocally movable inside the barrel, the piston and the barrel form an oil discharging chamber therebetween, the outer sleeve and the barrel form a first reflux chamber therebetween, the oil feeding sieve tube is positioned at a lower end of the outer sleeve and is in communication with an oil pumping chamber located in the piston;
• wherein the sealing device is positioned between the submersible linear motor and the oil pump;
• and
• wherein the balance assembly is positioned at a lower end of the submersible linear motor and is configured to balance pressure inside and outside the submersible linear motor.