The working principle of electric submersible oil pump oil recovery

Rod pump oil production is the most commonly used mechanical oil production method, it has the advantages of simple equipment, small investment, convenient operation and maintenance, etc.
, but the displacement is limited, and it is difficult to
apply in inclined wells.
Therefore, at present, the use of large-displacement electric submersible pump (referred to as electric submersible pump, electric pump) for oil production is an important means
to maintain stable production and high yield of oilfield.
Electric submersible pump oil production belongs to the rodless pump oil production method, that is, the pumping equipment
that does not require a sucker rod to transmit power.

The electric pump device is composed of three parts:
downhole, middle and surface.
The underground part mainly has four major parts: electric submersible pump, motor, protector and separator, which are connected to the lower end of the pipeline into the well: the middle part is mainly a special cable for transmitting electric energy; The ground floor part is mainly composed of two parts:
a control screen and a transformer.

After the transformer on the ground converts the grid voltage into the voltage required for the electric submersible pump device, the electric energy is input into the control screen, and then transmitted to the underground motor through the cable: the motor turns the electrical energy into mechanical energy to drive the electric submersible pump and the separator to rotate together: the separator draws the liquid in the well into the separator through the suction inlet, and after the gas-liquid separation, the well liquid is lifted into the electric submersible spring: The electric submersible pump transmits mechanical energy to the well liquid, improves the pressure energy of the well liquid, and thus lifts the well liquid to the surface
through the oil pipe.