Intelligent energy-saving device of pumping unit

Abstract

The invention discloses an intelligent energy-saving device of a pumping unit. The energy-saving device comprises a signal receiving module, a main control module, a signal analysis module and an upper computer, wherein the signal receiving module is connected with the main control module, and the main control module is connected with the signal analysis module and the upper computer. The energy-saving device provided by the invention has the following advantages that: 1, a sensor monitoring technology is applied, the load change of the pumping unit is accurately perceived, and a control mode is optimized to adjust the open-stop time and operating voltage of an alternating current motor along with a load change trend; 2, electric energy waste of the pumping unit caused by empty fishing or pump cavitation is reduced, and the electricity saving ratio achieves 30%-80%; 3, fault is monitored in time, fault occurrence rate is reduced, and the relative yield of an oil well is effectively improved; 4, no-load operation is avoided, parts abrasion is reduced, and plant maintenance cost is reduced; and 5, a data acquisition and memory function, network and communication as well as remote control telemetry function are realized, the device can be adjusted in real time according to the specific running state, the operation is simple, and intellectualization degree is high.

Description

technical field [0001] The invention relates to a pumping unit, in particular to an intelligent power saver for the pumping unit. Background technique [0002] With the continuous extraction of crude oil in oilfields, there are more and more low-yield wells in old oilfields. The use of oil wells with poor oil, uneven oil layers or uneven viscosity of crude oil makes the phenomenon of oil well pumping or emptying more and more serious. Reasonable control The operating conditions of the pumping unit can achieve the purpose of saving electricity, preventing the breakage of the oil rod caused by liquid hammer and reducing the wear of the pumping unit. The AC motor drives the pumping unit to pump crude oil to the ground through the up and down movement of the sucker rod. The overall efficiency of the pumping unit is very low, and the power consumption of the pumping unit accounts for about 35% of the cost of crude oil extraction, which is the high cost of oil extraction. Therefo...

AI Technical Summary

Problems solved by technology

This method is simple to control, but the power saving effect is not obvious

[0007] 4. Thyristor voltage regulation: It is generally called the soft start of the motor. By using the thyristor voltage regulation circuit to control the voltage, the power saving effect is better, but the power supply current waveform is distorted, and the harmonic pollution of the power grid is serious. Under the harsh environment of the oil field, its reliability is restricted, and at the same time, the structure is complex and the cost is high

It was found that adopting these methods either cannot save electricity to the maximum extent or cannot exert the maximum production capacity of the oil well.

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