含残余变形的连续油管下入过程载荷特性分析  

Analysis of Load Characteristics of Coiled Tubing in the Process of Entering the Tubing with Residual Deformation

作　　者：刘超 魏文澜 白鹏巨 姚磊 曹银萍[1] Liu Chao;Wei Wenlan;Bai Pengju;Yao Lei;Cao Yinping(Mechanical Engineering College,Xi'an Shiyou University,Xi'an 710065,China;Xi'an Key Laboratory of Integrity Evaluation of Difficult and Complex Oil and Gas Wells,Xi'an 710065,China)

机构地区：[1]西安石油大学机械工程学院,西安710065 [2]西安市高难度复杂油气井完整性评价重点实验室,西安710065

出　　处：《机电工程技术》2025年第1期96-101,共6页Mechanical & Electrical Engineering Technology

基　　金：国家自然科学基金青年科学基金(51901180);陕西省教育厅青年创新团队建设科研计划(21JP096)。

摘　　要：由于连续油管作业特点使其在入井初始阶段与井壁存在显著的摩阻,从而使作业载荷控制与紧急情况井口截断存在一定的安全风险,此外,研究还发现,连续油管的残余变形不仅影响初始悬重载荷,还会对连续油管在井筒内的运行稳定性产生显著影响。通过合理设计导向架半径,不仅可以减小连续油管的入井摩阻,还能够降低其因残余应力引起的变形累积。同时,导向架半径的优化设计有助于减少作业载荷的不确定性。针对连续油管的地面结构开展了其残余变形及其入井载荷特性研究,建立了理论解析模型。研究结果表明,连续油管的残余变形与井口导向架半径存在相关性。连续油管下入过程中含残余变形的连续油管初始悬重载荷随着导向架弯曲半径的增大而减小,通过控制连续油管的地面导向架半径,能够有效降低其入井摩阻,从而实现对作业安全性的有效提升。Due to the characteristics of coiled tubing operation,there is significant friction between it and the borehole wall during the initial stage of entry into the well,which poses certain safety risks in the control of operating load and the interception of the wellhead in emergencies.In addition,the study also finds that the residual deformation of the coiled tubing not only affects the initial hanging load,but also has a significant impact on the operating stability of the coiled tubing in the wellbore.By reasonably designing the radius of the guide frame,not only can the friction resistance of coiled tubing into the well be reduced,but also the deformation accumulation caused by residual stress can be reduced.At the same time,the optimal design of the guide frame radius helps reduce the uncertainty of the operating load.The residual deformation and its entry load characteristics of the surface structure of coiled tubing are studied,and a theoretical analytical model is established.The research results show that there is a correlation between the residual deformation of the coiled tubing and the radius of the wellhead guide frame.The initial hanging load of the coiled tubing with residual deformation decreases with the increase of the bending radius of the guide frame during running in the coiled tubing.By controlling the radius of the ground guide frame of the coiled tubing,the friction resistance to the wellbore can be effectively reduced,thereby achieving effective improvement of operation safety.

关 键 词：连续油管 残余变形 油井 管柱力学 入井摩阻 

分 类 号：TE358[石油与天然气工程—油气田开发工程]