A complete set of drive control device for submersible screw pump

Abstract

The invention relates to the technical field of oil extraction equipment, in particular to a complete drive control device set for an oil-submersible screw pump. The complete drive control device setcomprises a control module, an oil extraction mechanism module and a downhole detection module, wherein the oil extraction mechanism module comprises the oil-submersible screw pump, an oil-submersiblepermanent magnet motor and a composite oil pipe; the downhole detection module comprises a flow sensor, a temperature sensor and a pressure sensor; the control module comprises a high-precision vector frequency converter, a detection signal feedback device and a real-time monitoring control unit; the detection signal feedback device receives downhole first oil temperature, downhole second oil temperature and flow monitoring signals and transmits the downhole first oil temperature, downhole second oil temperature and flow monitoring signals to the real-time monitoring control unit; and the high-precision vector frequency converter carries out vector control on the oil-submersible motor according to the working condition and combined with the magnitude of output currents of the high-precision vector frequency converter. The complete drive control device set for the oil-submersible screw pump solves the problem that power cables in a traditional oil extraction system are easily abraded and corroded. Meanwhile, the problem of oil paraffin deposit at the low temperature is solved, faults are effectively reduced, and an oil well is maintained.

Description

technical field [0001] The invention relates to the technical field of oil extraction equipment, in particular to a complete drive and control device for a submersible screw pump. Background technique [0002] The traditional oil production mechanism uses an asynchronous motor to drive the kowtow machine and then drives the sucker rod to perform oil production with up and down strokes. In this structure, the effective oil production volume of one cycle stroke is only a few hundredths of the length of the overall sucker rod and the motor is in working state during the up and down strokes. Different, it will cause impact on the power grid. Although the surface direct drive screw pump device solves the problem of low oil production efficiency, its driving method is also the rotation of the surface motor to drive the rotation of the sucker rod. The driving link of several kilometers long will affect the kinetic energy. Cause huge waste, if do not take braking measure when motor ...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a complete set of drive and control device for submersible screw pump to overcome the problems of low system life and high failure rate of oil production in the prior art

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