组合式整形打捞筒的研制

Development of the combined shaping overshot

针对修井作业过程中腐蚀油管强度差,打捞成功率低,施工周期长等难题,研制了一种组合式整形打捞筒。应用三维制图Solidworks软件建立了组合式整形打捞筒的实体模型,并详述了工具的主要结构、工作原理、技术参数以及性能特点,应用有限元分析软件ANSYS Workbench模拟了组合式整形打捞筒的卡瓦打捞过程,得到了等效应力云图。在大港油田枣X井进行现场应用,成功捞获了原井腐蚀管柱,提高了一次打捞成功率。该组合式整形打捞筒可有效缩短施工周期,降低作业成本,具有良好的推广应用前景。

Aiming at the issue that the poor strength of corroded tubing,the low success rate of fishing and long construction period during the process of workover operations,a type of combined shaping overshot was developed.The entity model of the combined shaping overshot was established by the 3D drawing Solidworks software.The main structure and working principle as well as main technical parameters and performance characteristics of the tool was detailed.The finite element analysis software ANSYS Workbench is used to simulate the slip fishing process of the combined shaping overshot,and the equivalent stress cloud diagram is obtained.The technical solution has been applied in Dagang Oilfield Zao X well.The corroded pipe string of original well was successfully recovered,increase the success rate of the once fishing.The combined shaping overshot has a good prospect of popularization and application,with effectively shorten the construction period,reduce activity costs.