316L不锈钢膨胀筛管基管井下膨胀有限元分析  

A finite element analysis of the downhole expansion of the base tube of the 316L stainless steel expandable screen

作　　者：杨立辉[1] 李春福[1] 宋开红[1] 王燕群[2] 陈功剑[1] 贾平[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室 [2]天津大学机械学院

出　　处：《石油机械》2011年第8期11-15,2,共5页China Petroleum Machinery

基　　金：国家"863"计划项目"膨胀管钻井技术"(2006AA06A105)

摘　　要：针对膨胀筛管膨胀变形涉及到材料、几何和结构的非线性接触大变形难以运用现有理论精确求解的问题,利用ANSYS有限元分析技术,分析了316L不锈钢膨胀筛管井下工作的力学性能。选取适当的约束条件,模拟计算了φ114.3 mm(4 12英寸)316L不锈钢膨胀筛管基管在不同井下温度时的不同膨胀率膨胀和膨胀后的抗挤毁过程。分析结果表明,膨胀率和膨胀温度对膨胀前后基管的最大等效应力分布的影响不大,残余应力的峰值随膨胀温度的升高而下降;井下温度一定时,Bauschinger效应是降低抗挤毁性能的主要因素。The expansion of expandable screen involves the large nonlinear contact deformation of materials, geometry and structure, and it is difficult to use the existing theory to obtain the precise solution to the problem. Therefore, the ANSYS finite element analysis technology was used to analyze the mechanical properties of stainless steel expandable screen in downhole operation. Then proper constraints were selected to simulate the calculation of the base tube expansion of φ 114.3 mm 316L stainless steel expandable screen under different expansion rates as well as the anti-collapse process after expansion. The result showed that expansion rate and expansion temperature did not have remarkable effect on the distribution of the maximum equivalent stress of the base tube before and after expansion. The peak value of residual stress decreased with the increase of temperature. When the downhole temperature was fixed, the Bauschinger effect was the major factor to decrease the collapsing performance.

关 键 词：316L不锈钢 膨胀筛管 基管 非线性 有限元分析 残余应力 抗挤毁强度 

分 类 号：TG142.71[一般工业技术—材料科学与工程]