The workflow of the electric submersible pump system

Electric submersible pump system equipment, typical electric submersible pump systems can be divided into underground and surface parts. There are underground parts; Monitoring device, motor, protector, oil gas separator, multi-stage centrifugal pump, pump suction port, single flow valve, relief valve, power cable; The ground part includes motor controllers (such as frequency converters), junction boxes, transformers, flange joints, flow meters, etc.

The complete working process of the submersible pump is as follows: the three-phase dynamic voltage of the power grid is transformed into the input voltage of the submersible pump frequency converter through a transformer, and then transmitted to the control cabinet, which is equipped with frequency converters, downhole status monitoring instruments and other devices. The Three-phase electric power power source output end in the control cabinet is connected to the submersible cable through the junction box to provide power for the downhole submersible pump and submersible motor. The height of the produced crude oil level submerged the casing of underground monitoring devices, submersible motors, motor protectors, and other devices.

The produced fluid enters the oil-gas separator after passing through the suction port. The well fluid backflow and centrifugal movement separate part of the free gas from the front of the pump suction port into the annulus and then enters the pump. The pump and motor are always isolated and sealed, and the produced fluid will flow axially and radially, forming a spiral upward flowing liquid and pumping it into a higher level electric submersible pump.