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为了探究抽油井油管断裂的原因和破坏机理，采用油管柱载荷传感器对悬挂和抽油状态下的油管载荷进行了测试。根据测试结果分析可知，油管柱悬挂在井口及抽油过程中所受扭矩很小，可忽略不计；油管弯曲应力随机性很大，因受油井狗腿度、油管弯曲度和工人操作技术等影响，油管悬挂在井口有时会出现较大弯曲应力；油管受力复杂，在同一截面上各点的应力大小不同，既要考虑最大拉弯组合应力引起的油管破坏，还要考虑循环特征值较小时油管的疲劳问题。
In order to explore the reason and failure mechanism of tubing fracture in pumping well, the tubing load in suspension and pumping condition was tested by tubing string load cell. According to the analysis of the test results, it can be seen that the torque suffered by the tubing string suspended in the wellhead and the pumping process is negligible. The bending stress of the tubing is very random. Due to the influence of the dogleg of the well, the curvature of the tubing and the operation technique of the worker , Tubing hanging at the wellhead sometimes appear greater bending stress; tubing stress complex, the same cross-section of the stress at each point of different sizes, it is necessary to consider the combination of the maximum tension and compression pipe damage caused by stress, but also consider the smaller cycle characteristic value Tubing fatigue problems.