拉伸载荷下非金属敷缆复合连续油管力学行为模拟研究  

Simulation Study on Mechanical Behavior of a Nonmetallic Composite Coiled Tubing with Cable Laying under Tension Load

作　　者：张学敏[1] 张雪茹 李厚补 齐国权 高雄 ZHANG Xuemin;ZHANG Xueru;LI Houbu;QI Guoquan;GAO Xiong(School of Materials Science and Engineering,Chang’an University,Xi’an,Shaanxi,710064,China;State Key Laboratory of Oil and Gas Equipment,Xi’an,Shaanxi,710077,China;Shaanxi Yanchang Petroleum Northwest Rubber Co.,Ltd.,Xianyang,Shaanxi,712023,China)

机构地区：[1]长安大学材料科学与工程学院,陕西西安710064 [2]油气钻采输送装备全国重点实验室,陕西西安710077 [3]陕西延长石油西北橡胶有限责任公司,陕西咸阳712023

出　　处：《石油钻探技术》2025年第1期94-101,共8页Petroleum Drilling Techniques

基　　金：国家自然科学基金面上项目“基于气体渗透的热塑性塑料内衬管径向屈曲失效机制及定量风险评价研究”(编号:52274069);陕西省重点研发计划项目“内穿插修复聚乙烯内衬管屈曲失效风险评估技术研究及应用”(编号:2023-YBGY-177)资助。

摘　　要：非金属敷缆复合连续油管在起下及采油过程中因自重而承受拉伸载荷,明确敷缆管在该载荷下的力学行为,可以为敷缆管的安全服役提供指导。采用有限元软件,构建了非金属敷缆复合连续油管的三维数值模型,分析了敷缆管在拉伸载荷下的力学行为及其各结构层的力学响应,探究了敷缆工艺参数(缆线缠绕及分布角度)对敷缆管力学特性的影响。研究表明:在拉伸载荷下,敷缆管所有结构层的应力均因缆线缠绕呈螺旋式分布;敷缆管拉伸至失效时,会经历弹性变形、过渡和屈服变形3个阶段,此时管内缆线处于小塑性均匀变形状态;减小缆线缠绕角度,可以提高敷缆管的弹性模量及其轴向承载能力,但会使敷缆管提前进入过渡阶段,进而发生屈服;缆线分布角度对敷缆管力学特性的影响不大。因此,在生产制造该类敷缆管时应着重考虑管内缆线的缠绕角度,该参数与敷缆管在拉伸载荷下力学性能的相关性较大。Nonmetallic composite coiled tubing with cable laying is subjected to tension load due to its selfweight in the process of frequent lifting and lowering of wells for oil extraction,and clarifying the mechanical behavior of the pipe under this load can provide guidance for the safe service of the pipe.A three-dimensional numerical model of nonmetallic composite coiled tubing with cable laying was constructed by finite element software,and the mechanical behavior of the pipe under tension load and the mechanical response of each structural layer were analyzed.The influence of cable laying process parameters,such as cable winding and distribution angles,on the mechanical properties of the pipe was explored.The results indicate that under tension load,the stresses in all structural layers of the pipe with cable laying exhibit a spiral distribution because of cable winding.When the pipe is stretched to failure,it undergoes three stages:elastic deformation,transition stage,and yield deformation.Meanwhile,the cables are in a state of small plastic uniform deformation.Reducing the cable winding angle can enhance the elastic modulus and axial loadbearing capacity of the pipe with cable laying.However,it may cause the pipe to enter into the transition stage prematurely and then yield in advance.The cable distribution angle has a minimal impact on the mechanical properties of the pipe.Therefore,when this type of pipe is manufactured,special emphasis should be placed on the cable winding angle,as this parameter is highly correlated with the mechanical properties of the pipe under tension loads.

关 键 词：非金属敷缆 连续油管 拉伸载荷 力学特性 缆线 有限元分析 

分 类 号：TE933.8[石油与天然气工程—石油机械设备]