Treatment and Precaution Measures for Natural Gas Hydrate of Shannxi-Beijing Gas Transmission Pipeline

Taking the Shannxi-Beijing Gas Transmission Pipeline as an example, formation condition of NGH is discussed, influence of NGH on safe running of gas pipeline is analyzed.The paper probes into the origin of free water within pipeline, gives methods to judge and predict the position where NGH formed and NGH plugged oriceblock, which prove that results of judgement and prediction is in accordance with actual running status of gas pipeline.Specific steps and measures to treat and prevent NGH plug for Shannxi-Beijing Gas Transmission Pipeline are put forward.