固井过程套管串屈曲变形分析  

Analysis of Buckling Deformation about Casing in Cementing

作　　者：王秀文[1] 刘巨保[1] 黄金波 岳欠杯[1] 

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]大庆钻探钻井生产技术服务一公司,黑龙江大庆163411

出　　处：《石油矿场机械》2011年第4期17-21,共5页Oil Field Equipment

摘　　要：针对深井固井过程套管串失稳变形现象,选取垂直井眼内轴向零点以下套管串为研究对象,考虑套管与井壁的接触摩擦以及套管串的变截面结构,采用有限元结构稳定性分析方法对受压套管串进行失稳计算。将求得的多阶失稳波形叠加值作为套管的初始位移值,再采用接触非线性分析方法模拟套管串与井壁之间的接触摩擦,分析了变截面对套管屈曲变形的影响。对管柱受压屈曲分析具有重要的理论意义和应用价值。In order to solve the instability phenomenon about casing in cementing,select the casing string that below zero axial as object in vertical well,considering the contact about the casing with wellbore and the variable cross-section of structure,the casing post-buckling and contact with wellbore are solved by using nonlinear method of contact,and the initial displacement of casing is obtained from the multi-band instability wave superposition value to be calculated using structure stability analysis,analysis the influence on the variable cross-section for the buckling deformation,its have important theoretical significance and application value for the buckling analysis of string.

关 键 词：套管 后屈曲 有限元 失稳 

分 类 号：TE931.201[石油与天然气工程—石油机械设备]