上扣扭矩对储气井疲劳性能的影响  

Influence of Make-up Torque on Fatigue Performance of Gas Storage Well

作　　者：宋利滨[1] 马源[1] 张烟生[1] 

机构地区：[1]大连理工大学

出　　处：《化工机械》2013年第6期776-779,共4页Chemical Engineering & Machinery

基　　金：质检公益性行业科研专项资助项目(201010222)

摘　　要：采用有限元法对不同载荷工况下的储气井进行应力计算,得到了交变应力幅值的分布云图。通过分析储气井上最大交变应力幅值可能出现的位置,得到了上口扭矩(过盈圈数)对储气井疲劳性能的影响规律。研究认为:外露螺纹槽内或套管与管箍啮合的第一螺纹牙根部易发生疲劳失效;上扣扭矩对疲劳失效出现的位置影响较大,对最大交变应力幅值的变化影响较小;将过盈圈数控制在3圈之内,储气井不易出现疲劳失效现象。Making use of the FEA method, the stress of gas storage well under different load cases was calcu- lated to obtain the distribution of cyclic stress amplitude. Through analyzing the possible position of largest cy- clic stress amplitude in gas storage well, the influence of make-up torque on the fatigue performance of gas storage well was caught. The research results show that the fatigue failure usually appears on the exposed thread groove or the first thread root of the mesh point between casing and pipe hoop; and the make-up torque greatly influences the position where fatigue failure appeared and it influences the range of the largest cyclic stress amplitude little. Having interference ring number controlled within 3 rings doesn＇ t result in fatigue fail- ure in the gas storage well.

关 键 词：高压容器 储气井 疲劳 上扣扭矩 交变应力幅值 有限元分析 

分 类 号：TQ051.3[化学工程]