Frequency-conversing compensating and energy saving control apparatus of oil pumping unit in oil fields

Abstract

The invention discloses a frequency-conversing compensating and energy saving control apparatus of an oil pumping unit in oil fields. The apparatus is composed of a motor, a sensor, a data acquisition unit, and a frequency-conversing compensating control unit. The sensor and the data acquisition unit transmit the collected data signals to the frequency-conversing compensating control unit. The shut down or starting of the motor is controlled by the frequency-conversing compensating control unit through a discontinuously-pumping control switch, and the speed of the motor is changed by frequency conversion and speed regulation. The frequency-conversing compensating control unit is controlled by a closed loop feedback system, and is composed of a frequency converter, a programmable logic controller (PLC), a temperature control module, a position detection module, a brake module, an operation panel and a parameter adjusting panel. The energy saving effect is realized by controlling the discontinuously-pumping and frequency conversion and speed regulation of the motor of the oil pumping unit through the frequency-conversing compensating control unit. The technical scheme of the invention employs the frequency conversion control, ensures the accurate match of an output power of the motor and load demands, and dynamically adjusts the pumping speed according to a real feed flow capability of oil wells. The electric energy is saved, the crude oil output is increased, and the service life of the apparatuses is prolonged.

Description

technical field [0001] The invention belongs to the control field of oil field pumping units, and in particular relates to a frequency conversion compensation energy-saving control device for oil field pumping units. Background technique [0002] The method of extracting oil in the formation can be divided into two categories: one is to use the energy of the formation itself to lift crude oil, which is called the self-spraying oil recovery method; the other is to artificially use mechanical equipment to pump oil into the well due to the lack of energy in the formation itself. Liquid supplement energy can lift crude oil to the ground, which is called artificial lift oil recovery method or mechanical oil recovery method. Most countries in the world use mechanical oil recovery, and the percentage of beam pumping units in mechanical oil recovery is the highest. Conventional beam pumping units have the advantages of simple structure, easy manufacture, high reliability, good dura...

AI Technical Summary

Problems solved by technology

Domestic oil fields have also used energy-saving devices on some oil wells, but none of the products have been widely used. The main reason is the price problem. Products with good effects are often expensive, and the cost recovery period is too long. Products with low prices Energy saving effect is not obvious

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