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METHOD FOR OIL EXTRACTION USING A SUBMERSIBLE LINEAR ELECTRIC MOTOR

11/19/2019

A method for oil extraction using a submersible linear electric motor, comprising:

  • entering parameters of a submersible linear electric motor and a pump associated with the motor into a microcontroller;
  • setting a maximum number of the motor reciprocating strokes based on the measurements of the motor temperature, the pump intake pressure, and electric current consumed by the submersible linear electric motor;
  • maintaining the maximum number of the motor reciprocating strokes in a range which limit does not exceed values of an emergency levels of the motor temperature and the pressure at the pump intake: increasing or decreasing in the number of the motor reciprocating strokes depending on cooling, normal operation, heating, or overheating of the motor; increasing or decreasing in the number of the motor reciprocating strokes depending on saturation, normal operation, initial decompression, or complete decompression at the pump intake;
  • determining metering values of the load and displacement of a plunger of the submersible pump associated with the linear submersible electric motor by taking the metering values from current sensors associated with the linear submersible electric motor: increasing or decreasing in the number of the motor reciprocating strokes depending on fullness of the plunger of the submersible pump, which is determined by the obtained metering values of the load and the displacement of the plunger of the submersible pump.

The method for oil extraction using a submersible linear electric motor is characterized in that the validity of the obtained metering values is determined by the microcontroller. Correspondence of the obtained metering values to a pre-formed range of valid metering values is set, whereby time intervals for changing the motor reciprocating strokes are adjusted taking into account conditions for obtaining the metering values. Formation of the range of the metering values is carried out based on a sample of previously obtained data which is formed taking into account a pre-set permissible error and the number of the values in the range of values. Every obtained value that repeats a previous value or exceeds the pre-set permissible error is not taken into account. Each new range of the metering values is formed after receiving several progressively metering values that exceed the pre-set permissible error with respect to a previous range of metering values and do not exceed the pre-set permissible error with respect to this range. The pre-set permissible error is maintained during the oil extraction process regardless of the average value of the obtained metering values of each range.

The method for oil extraction using a submersible linear electric motor is characterized in that the reproduction of the metering values of the load and displacement of the plunger of the submersible pump is carried out in a graphic form. The parameters of the submersible linear electric motor and the pump associated with the linear submersible electric motor are previously entered into the microcontroller.

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