Oil Pump.

The submersible part of the ESP equipment is a pumping unit vertically lowered into the well on a tubing string, consisting of a submersible motor (submersible electric motor), a hydraulic protection unit, a liquid intake module, the ESP itself, a check valve, a drain (drain) valve. The bodies of all units of the submersible part of the ESP are pipes with flanged connections for mating with each other, with the exception of the check and drain valves, which are threaded to the tubing.