Abstract: A submersible linear motor (100) comprising a stator (10) and a mover (20) moving in a linear motion arranged within the stator (10). The stator comprising a stator inner pipe (14), a stator outer pipe (13), and a plurality of windings (11) disposed between the stator inner pipe and outer pipe. The mover comprises a mover inner pipe (21), a plurality of permanent magnets (23), a plurality of magnetic rings (24), and a plurality of wearing rings (25). The plurality of permanent magnets and magnetic rings being sleeved onto the mover inner pipe. Each magnetic ring arranged between two adjacent permanent magnets. The plurality of permanent magnets being arranged between every two wearing rings. The plurality of wearing rings forming a friction pair with the stator inner tube, ensuring the smooth operation of the motor and reducing vibration.

Abstract: A submersible linear motor oil pumping system includes a submersible linear motor (100), an oil pump (200), a sealing device (300), and a balance assembly (400) installed underground. The submersible linear motor (100) includes a stator (10) and a mover (20) moving reciprocally inside the stator (10). The oil pump (200) includes a barrel (32), a piston (34), an outer sleeve (36), and a oil feeding sieve tube (38). The sealing device (300) is positioned between the submersible linear motor (100) and the oil pump (200). The balance assembly (400) is positioned at a lower end of the submersible linear motor (100) and is configured to balance pressure inside and outside the submersible linear motor (100). The present system omits the sucker rod of existing oil pumping systems, avoiding stroke loss caused by sucker rod elongation and energy loss caused by the weight of the sucker rod and pipe rod offset grinding, thereby improving the efficiency of the system.