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在煤层气集输管网运行中,多次出现煤层气、排采水泄漏事件,严重时甚至造成部分井台、集输主管网放空。针对集输管网出现的气、水泄漏问题,在管线抢修的过程中,我们发现部分集输管线内介质长时间无法排除干净,而对于常用的电热熔等工艺维修而言,其对于外界环境的因素较为敏感,管道内存在的介质会对抢修的工程质量造成极大的影响,且介质放空时间的过长,导致维修时间长,因此我们需要考虑一种无需排空管道内气、液就可以进行维修的工艺。
During the operation of CBM network, CBM and drainage water leaks occurred several times, and in some serious cases, some wells and gathering pipe networks were left empty. In view of the problems of gas and water leakage in the gathering and transportation network, during the repair of the pipeline, we found that some mediums in the gathering pipeline can not be ruled out for a long time. However, for the maintenance of commonly used electrofusion and the like, Of the factors are more sensitive to the existence of the pipeline medium will repair the project quality has a tremendous impact, and the media is too long time to vent, resulting in a long time to repair, we need to consider a need to empty the pipe gas, liquid on the Can be repaired process.