非均匀载荷下磨损套管抗挤强度研究  

Research on the Collapse Resistance of Crescent-shaped Worn Casings Under Non-uniform Loading

作　　者：林元华[1] 曾德智[1] 施太和[1] 周小燕 林凯[3] 韩新利[3] 

机构地区：[1]西南石油学院石油管力学和环境行为重点实验室,成都610500 [2]中石化西北分公司,乌鲁木齐830011 [3]石油管材研究所,西安710065

出　　处：《机械科学与技术》2006年第5期557-559,共3页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50074025);中国石油天然气集团公司中青年创新基金项目;石油管力学和环境行为重点实验室项目"套管钻井管柱力学"和"复杂工况下钻柱安全性关键因素研究"资助

摘　　要：针对非均匀载荷下套管磨损后抗挤强度降低的问题,将磨损简化为套管的壁厚不均度和内壁不圆度几何缺陷。在此基础上,建立了非均匀载荷下磨损套管抗挤强度计算方程。该方程计算值与试验值的对比表明,该方程计算结果是可靠的,可为复杂地层磨损套管柱设计提供理论依据。研究表明,当载荷不均匀程度较小时,磨损对套管抗挤强度的影响较大;当载荷不均匀程度较大时,磨损对套管抗挤强度的影响较小。Non-uniform loading can reduce the collapse resistance of worn casings.For the purpose of finding an algorithm to compute it, worn casings are looked at as geometry imperfections such as ovality and eccentricity. Hence new equations for computing the collapse resistance of crescent-shaped worn casings under non-uniform loading are established. The comparison of different equations with experimental data that the new equations are more reliable and provides theoretical basis for the design of casings in ultra-deep wells. The research indicates that wear has much key factor for its reduction when the non-uniform loading smaller effects on the collapse resistance. larger effects on the collapse resistance and is a coefficient is smaller and that wear has much smaller effects on the collapse resistance.

关 键 词：非均匀载荷 套管 磨损 抗挤强度 计算方程 

分 类 号：TE931.2[石油与天然气工程—石油机械设备] TB64[一般工业技术—制冷工程]