By this method, when the surfacedynamometercard is known, the dynagraph at the pump can be accurately determined;
用这种方法，在地面示功图已知时，可以精确地确定井下泵的示功图；
2
The results show that the predicting surfacedynamometercard is consistent with the measured card and can be used to analyze the data of pumping Wells.
实例计算表明，预测示功图与实测示功图基本相符，可以用于分析抽油机井的工作状况。
3
Surface liquid yield measurement using dynamometercard (SLYMUDC) is a method of computing surface liquid yield of Wells by analyzing polished rod load and displacement.