根据油井供、排平衡原则，得出了抽油泵排量系数相对稳定状态下产量预测的关系；
According to the principle of supply and discharge balance, the method to predict oil yield is presented.
本文以大量的现场测试数据为基础，建立了抽油机井排量系数、井下功率损失及地面效率的回归方程；
On the basis of a large number of field data, the regression equations of displacement coefficient, down-hole power loss and surface efficiency for pumping wells are established.
本文对三种典型结构的安全阀进行了排量系数与开启高度关系的试验，并对试验结果进行了分析和讨论。
The correlation between discharge coefficient and lift was tested for three typical safety valves, and the experimental results were analysed and discussed in this paper.
本文在抽油机井大量现场测试数据的基础上，建立了抽油机井系统效率、排量系数这两个重要指标与诸影响因素之间的回归方程。
On the basis of a large number of field test data, the regression of the displacement coefficient and system efficiency for pumping unit wells were established.
在此基础上，采用数值积分方法分析了凸轮泵的理论排量、容积利用系数等特性。
On this basis, the theoretical flow and effective volumetric rate are calculated with digital integration.
在此基础上，采用数值积分方法分析了凸轮泵的理论排量、容积利用系数等特性。
On this basis, the theoretical flow and effective volumetric rate are calculated with digital integration.
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