大尺寸井眼一体化打捞工具的研制与应用

Development and Application of Large-Borehole Integrated Fishing Tool

相较于传统打捞作业,大尺寸井眼打捞成功率一直较低,主要原因在于井眼尺寸与落鱼尺寸相比过大,且落鱼钻具倾斜靠边,打捞工具无法有效笼获鱼头并引导鱼头进入打捞工具内部。文章根据打捞工具、鱼头和井眼尺寸三者的关系,通过建立几何与受力状态模型,分析得到了影响打捞成功率的相关参数和要点,为科学设计打捞工具提供了理论支撑。同时,在制造打捞工具规范化方面,以一体化打捞工具组件集成的方式,实现了规范且快速投入使用的目的,从而提高工具可靠性并节约准备时间。通过现场试验,优化改进后的大井眼一体化打捞工具能显著的提高打捞成功率,对今后同类事故的处理具有推广和指导意义。

Compared with fishing operations,the large-borehole fishing success rate has been low.The main reason is that the hole size is too large compared with the fish size,and the fish drilling tool is tilted to the side,and the fishing tool can not effectively trap the fish head and guide the fish head into the fishing tool.In this paper,according to the relationship between fishing tools,fish head and borehole size,the relevant parameters and key points affecting the success rate of fishing are obtained by establishing the geometric and force state model,which provides theoretical support for the scientific design of fishing tools.Meanwhile,in the standardization of manufacturing fishing tools,the purpose of standardization and rapid use is realized by integrating fishing tool components,so as to improve tool reliability and save preparation time.Through field tests,the optimized and improved large-borehole integrated fishing tool have significantly improved the success rate of fishing,and has promotion and guiding significance for the treatment of similar accidents in the future.