There are high stress risk points in oilfield gathering and transmission crossing pipelines lo-cated in complex terrain,which have great impact on the environment in case of leakage.It is necessary to analyze and study the distribution of high stress points in the pipeline crossing section.For a certain oilfield gathering and transmission crossing pipeline in a loess plateau area,finite element analysis meth-od is used to study the distribution of stress risk points of crossing pipeline under the effect of self-weight of pipe body and medium,soil movement,and superposition of both,which reveals its distribution law.Then,a portable ultrasonic stress detector is used to test and verify the stress risk points of the typi-cal crossing section simulated by finite elements.The results show that the influence of soil movement on the stress concentration degree of the crossing pipeline is greater than that of the pipe body and medium self-weight,and the stress concentration degree at the corner of the foot of the crossing pipeline under the action of soil movement is greater than that at the corner of the top of the hill.The research result can provide key directions for daily maintenance and operation in oilfields.
关键词
跨越段管线/高应力风险点/有限元分析/应力集中
Key words
crossing pipelines/high stress risk points/finite element analysis/stress concentration
维普
万方数据