Indicator diagram-based oil pumping machine regulating and controlling method

Abstract

The invention relates to an indicator diagram-based oil pumping machine regulating and controlling method. The method comprises the following steps: acquiring production parameters of an oil pumping machine well in real time; drawing an indicator diagram of an oil producing well by combining the parameters of the pump hanging, the pump diameter, the stroke, the stroke frequency and the liquid production capacity of an oil well, and calculating the saturation degree of the indicator diagram; performing analysis processing on the data of the indicator diagram and drawing a static load line; solving dynamic fluid level data of the oil well by utilizing dynamic fluid level calculating software; determining the reasonable submergence depth of the oil well according to the dynamic fluid level data of the oil well; performing analysis and calculation on the real-time production parameters of the oil well through a computer to obtain reasonable operating parameters of an oil pumping machine; remotely and intelligently regulating output frequency by utilizing a frequency conversion technology; changing the operating rotating speed of a motor of the oil pumping machine, so that the real-time closed-loop regulation of the working conditions of the oil well is realized. The regulating and controlling method disclosed by the invention is mainly used for optimizing the operating parameters of the oil pumping machine; the operating parameters of the oil pumping machine are regulated in real time; the automatic closed-loop control is realized.

Description

technical field [0001] The invention relates to a control method for a pumping unit in oilfield development, in particular to an intelligent automatic control method for a pumping unit. Background technique [0002] In the process of oil production, since the energy and fluid supply volume of the underground layer of the oil well are a dynamic process, if the pumping unit operates with a fixed stroke and stroke times, it will cause the difference between the fluid supply capacity of the oil well and the lifting capacity of the pump. Matching, and then there will be problems of reduced pump efficiency and waste of energy. The traditional control method of the pumping unit is to adjust the pumping unit stroke and stroke times by adjusting the pulley and the transmission gear to achieve the mechanism of adjusting the work of the pumping unit so that it can meet the dynamic fluid supply changes of the oil well. The application of frequency conversion speed regulation technology...

AI Technical Summary

Problems solved by technology

The application of frequency conversion speed regulation technology and speed regulation motor provides a technical guarantee for the real-time dynamic adjustment of pumping unit stroke times. At present, a number of pumping unit control technologies based on this technology have been formed. A Chinese utility model patent specification CN201650237U discloses a An energy-saving electric control device for a pumping unit, which can realize open-loop control, but cannot realize closed-loop control; a kind of intelligent drag device for pumping units is disclosed in the Chinese utility model patent specification CN201802359U, although it can realize closed-loop control, but due to The technical limitations of sensors in key parts limit the function of the overall system

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