滚筒处连续油管疲劳寿命有限元分析  

Finite element analysis on fatigue life of coiled tubing near the drum

作　　者：贺海军[1] 韩璐[2] 窦益华[2] 曹银萍[2] 曹立虎 HE Haijun HAN Lu DOU Yihua CAO Yinping CAO Lihu(Research Institute of Oil Production Engineering, Daqing Oilfield Co. ,Ltd. , Heilongjiang Daqing, 163453, China School of Mechanical Engineering, Xi＇an Shiyou University, Shaanxi Xi＇an, 710065, China Research Institute of Petroleum Engineering Technology, Tarim Oilfield Co. , of PetroChina, Xinjiang Kuerle, 841000, China)

机构地区：[1]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453 [2]西安石油大学机械工程学院,陕西西安710065 [3]中国石油塔里木油田分公司工程技术研究院,新疆库尔勒841000

出　　处：《机械设计与制造工程》2017年第9期31-34,共4页Machine Design and Manufacturing Engineering

基　　金：国家科技重大专项资助项目(2016ZX05051-19)

摘　　要：为了弥补解析计算难以准确预测连续油管疲劳寿命的不足,用ANSYS Workbench有限元分析软件建立了滚筒处的连续油管三维有限元力学分析模型,分析了不同内压作用下连续油管的疲劳寿命,考察了壁厚对连续油管疲劳寿命的影响,并与之前文献通过实验方法得到的结果进行比较。结果表明,不同内压作用下,不同壁厚连续油管疲劳寿命有限元分析结果与实验结果趋势相同,最大误差小于8.46%,平均误差为5.84%~7.04%,满足石油工程10%的精度要求,因此可以使用有限元软件对不同规格、不同工况下的连续油管进行疲劳寿命分析。随着壁厚的增加,连续油管疲劳寿命呈非线性增加,因此增加壁厚是提高连续油管疲劳寿命的有效手段。The fatigue life of coiled tubing is a key parameter to influence its widespread application,and does not be accurately calculated.Based on the finite element method,it establishes the three-dimensional finite element model of coiled tubing near the drum,analyzes the fatigue life of coiled tubing of different wall thicknesses exerted by different inner pressures.Comparing with experiment results,it shows that the relationships between fatigue life and wall thickness is very similar and the relative error is less than 8.46%,the average error is 5.84% - 7.04%,which is less than 10% and acceptable for petroleum engineering.So,it proves that the method can be used to analyze the fatigue life of coiled tubing of different diameter and wall thickness loaded by different inner pressures.The fatigue life of coiled tubing increases non-linearly with the increase of wall thickness.It proposes that means thick walled coiled tubing is an effective measure to increase the fatigue life.

关 键 词：疲劳寿命 连续油管 有限元分析 应变-疲劳特性 

分 类 号：TE932[石油与天然气工程—石油机械设备]