By this method, when the surface dynamometer card 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；
The results show that the predicting surface dynamometer card 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。
Surface liquid yield measurement using dynamometer card (SLYMUDC) is a method of computing surface liquid yield of Wells by analyzing polished rod load and displacement.
示功图量油就是通过对悬点载荷与悬点位移进行分析，计算井口产液量的一种方法。
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