Abstract: Based on the principle of spring equation, the graphic method is used to study the load-position diagram of pumping wells in respect to the utilization of stroke and the operation of pump at the bottom. A set of formulas have been derived for calculating fluid gravity in the bole. The resultsof calculation using these formulas have been proved to be practical in the main.

摘要： 本文用弹簧方程的原理,应用图解法对抽油井示功图进行冲程利用的分析和泵在井下技术状况的诊断。推导出的一套井下流体比重的计算公式,经实践核对,基本相符。