高原冻土区含缺陷天然气管道现场应力检测和分析  

Stress Detection and Analysis of Defective Natural Gas Pipelines in Plateau Frozen Soil Area

作　　者：张良 惠文颖 徐琳 方卫林 李玉坤[4] ZHANG Liang;HUI Wenying;XU Lin;FANG Weilin;LI Yukun(CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China;PipeChina West Pipeline Company,Urumqi,Xinjiang 830013,China;PetroChina Changqing Oilfield Company,Xi′an,Shaanxi 710299,China;China University of Petroleum,Qingdao,Shandong 266580,China)

机构地区：[1]中国石油集团工程材料研究院有限公司,陕西西安710077 [2]国家管网西部管道公司,新疆乌鲁木齐830013 [3]中国石油长庆油田公司,陕西西安710299 [4]中国石油大学(华东),山东青岛266580

出　　处：《石油管材与仪器》2022年第5期57-59,65,共4页Petroleum Tubular Goods & Instruments

摘　　要：高原冻土区铺设的油气管线易受冻胀融沉影响而发生管道变形和失效。采用基于声弹性理论的超声波应力测试方法,对某输气管道褶皱缺陷和变形处进行了轴向应力测试。结果表明:超声波应力检测技术是针对变形管线在线应力测量的一种有效手段,可为变形管道的维修维护提供数据参考。建议对类似冻土区域的管线开展应力应变监测和防控治理。此外,进一步开展管线屈曲变形的临界应力值研究对后期预防管道发生屈曲变形有重要意义。The oil and gas pipelines laid in the frozen soil area of the plateau are susceptible to frost heave and thaw settlement,which may cause pipeline deformation and failure.The ultrasonic stress test method based on acoustic elasticity theory was used to test axial stress of the fold defects and deformation of a gas pipeline.The results show that ultrasonic stress detection technology is an effective method for online stress measurement of deformed pipelines,and can provide data support for the repair and maintenance of deformed pipelines.It is recommended to carry out stress monitoring and prevention and control treatment for pipelines in similar frozen soil areas.Further research on the critical stress value of pipeline buckling deformation is of great significance to the subsequent prevention of pipeline buckling deformation.

关 键 词：管道 冻胀 缺陷 轴向力 应力测试 

分 类 号：TE973[石油与天然气工程—石油机械设备]