电泵井分离器壳体断裂原因分析及对策

Results Interpretation and Measures for Separator Shell Crack in Electric Pump Well

根据现场鉴定分离器壳体断裂的情况,即断裂位置都在分离器的下部1／3处,内部对应的是分离器的旋转部件叶轮部分,断裂处的形状均呈非常规则的圆形,呈十分锋利的刀刃状,结合近年来分离器壳体断裂电泵井的生产运行情况,否认了上述两种传统观点,提出了分离器扶正体失效导致叶轮与壳体发生偏磨、叶轮在高速旋转时(2900 r／min)将分离器壳体磨断的新观点。根据此观点,提出了解决分离器壳体断裂问题的思路与对策,并就其现场应用的可行性进行了论证。同时,总结分析了1998年以来第三采油厂在27口低含气电泵井上取消分离器使用吸入口的现场应用情况,对吸入口的推广应用提出了相应的建议。

According to the field identification of separator shell crack, it can be found that the crack part lies in 1/3 part in the bottom, and correspondingly it is the leaf cycle part of the separator ' s circle assemblage inside the separator. The crack part is very regular circular, like sharp knife edge. In this paper, it is believed that the ineffective setting upright of separator results in the eccentric wear between the leaf cycle and shell, and then the leaf cycle polishes the separator shell into break during high velocity rotation (2900 rotation/min). Based on this opinion, the idea and measures to solve the crack of separator shell have been established, and their feasibility of applying to the field is demonstrated. From 1998 , separators have been not used while induction ports have been used in 27 low gas bearing electric pump wells in No. 3 Oil Production Company. The application results of these 27 wells are analyzed, and suggestions to the application of induction ports are established.