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本文根据能量守恒原理及多相流体流动规律，结合抽油机井的生产特点， 通过建立泵排量系数、泵效等参数与泵吸入口压力之间的关系和引入当量直径的方 法，得出了一种新的抽油机井井筒压力计算方法，并以此计算了抽油机井流出曲线。 应用节点系统分析方法分析油井的实践表明，该方法的计算精度较高，满足工程计 算要求。
In this paper, according to the principle of energy conservation and multiphase fluid flow, combined with the production characteristics of pumping well, through the establishment of pump displacement coefficient, pump efficiency and other parameters of the relationship between the inlet pressure and the introduction of equivalent diameter method, obtained a A new calculation method of wellbore pressure of wellbore and calculates outflow curve of wellbore. The application of node analysis method to analyze oil well shows that the method has higher calculation accuracy and meets the engineering calculation requirements.