某火山监测站流体观测井修复工程施工技术

Construction Technology for Restoration of Fluid Observation Well at a Volcanic Monitoring Station

摘要:

为解决某火山监测站流体观测井事故加事故的复杂修复难题，施工团队在前期充分准备多种钻井事故处理工具，还与厂家定制特殊套铣工具，并结合现场灵活加工工具，以此支撑捞、反、磨、套铣等多种事故处理方法的实施。施工中，借助井下电视系统精准观察井内状况，清晰掌握落物位置与状态；同时采用泥浆不落地工艺，构建冲洗液循环系统，避免泥浆污染环境，实现绿色施工。最终，团队成功完成观测井修复，将井内落物全部打捞，且未对井壁造成二次损伤，修复后的观测井可正常放置指定规格的探头监测仪器，不仅取得显著经济效益，挽回近二百万元损失，还保障了火山监测工作的后续开展，具备良好社会效益。

Abstract:

To solve the complex repair problem of"accident plus accident"in a fluid observation well of a volcanic monitoring station,the construction team fully prepared a variety of drilling accident handling tools in the early stage,customized special casing milling tools with the manufacturer,and combined with on-site flexible tool processing to support the implementation of various accident handling methods such as"fishing,reversing,grinding,and casing milling".During the construction,the downhole TV system was used to accurately observe the conditions in the well,clearly grasping the position and state of the fallen objects;at the same time,the"mud non-landing"process was adopted to build a flushing fluid circulation system to avoid mud polluting the environment and realize green construction.Finally,the team successfully completed the repair of the observation well,fished out all the fallen objects in the well without causing secondary damage to the well wall.The repaired observation well can be used normally to place the probe monitoring instruments of the specified specifications into the well.This not only achieved significant economic benefits and restored nearly 2 million yuan from losses,but also ensured the subsequent development of volcanic monitoring work,with good social benefits.