深井、超深井套管柱强度设计磨损分析  

Wear Analysis for Strength Design of Casing Strings in Deep and Ultra-deep Wells

作　　者：杜聪 张建兵[1] 鞠录岩 罗楚 DU Cong;ZHANG Jianbing;JU Luyan;LUO Chu(Xi'an Petroleum University,Xi'an 710065,China)

机构地区：[1]西安石油大学,陕西西安710065

出　　处：《钢管》2021年第1期18-22,共5页Steel Pipe

基　　金：国家自然科学基金"膨胀管金属密封结构扩径变形过程的工作机理研究"(51974251);中国石油科技创新基金"用于水平井套变治理的新型膨胀套管接头金属密封研究"(2019D-5007-0305);陕西省重点研发计划项目“膨胀套管接头金属密封面设计关键技术研究”(2020KW-015)。

摘　　要：结合深井、超深井套管柱的服役环境与实际力学载荷,分析了国外先进套管柱设计规范,重点研究了深井、超深井建井中钻进和生产过程中的套管柱磨损导致的套管强度降低等问题。从均匀磨损模型和偏心筒模型两个方面对磨损套管的力学性能进行分析,并通过有限元软件对这两种计算方法的精度进行比较。发现采用偏心筒模型计算的结果更贴合实际,能提高套管柱强度设计质量。With consideration of the service conditions and actual mechanical loads of the casing string working in the deep and ultra-deep wells,the advanced casing string design codes as made abroad are analyzed.Also studied as the focus are the problems like casing strength reduction as caused by wear of the casing string which occurs during the process of drilling-in operation when building a deep or ultra-deep well,or during the production process.Based on the even-wear model and the eccentric cylinder model,the mechanical properties of the worn casing are analyzed,and the accuracies of the two computation methods are compared with relevant FEA software.As a result,it is identified that the calculation result from the eccentric cylinder model is more practical,being capable of improving the strength design quality of the casing string.

关 键 词：套管 磨损 环向应力 抗挤强度 抗内压强度 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]