连续管磨损程度及剩余抗内压强度敏感性分析  

Analysis of Wear Degree and Sensitivity to Residual Internal Compressive Strength of Coiled Tubing

作　　者：曹银萍[1] 潘莹 窦益华[1] 郑杰[1] CAO Yin-ping;PAN Ying;DOU Yi-hua;ZHENG Jie(School of Mechanical Engineering,Xi’an Shiyou University,Shaanxi Xi’an 710065,China)

机构地区：[1]西安石油大学机械工程学院,陕西西安710065

出　　处：《机械设计与制造》2024年第8期80-83,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金青年基金—附加牵引力与减阻效应的大位移水平井连续油管极限下入机理研究(52004215)。

摘　　要：针对连续管在水平井中下入起出时与套管内壁产生摩擦磨损的问题,借鉴钻杆-套管磨损模型建立思路,采用“磨损-效率”模型,研究下入起出时连续管摩擦磨损,获得了连续管外壁磨损深度的计算方法与公式;利用ANSYS Workbench有限元软件分析了连续管外径、壁厚、钢级、磨损率等敏感性因素对磨损连续管剩余抗内压强度的影响规律。研究表明:磨损率不同,井下磨损连续管最先屈服的部位亦不同;Φ44.45mm×3.96mm的QT-900连续管磨损率从0%到25%时,剩余抗内压强度下降率为35%;磨损连续管剩余抗内压强度随壁厚和钢级的增加而非线性增大,随外径和磨损率的增大而非线性降低;磨损率对连续管剩余抗内压强度的影响最强。研究结果可为磨损后连续管施工参数提供指导。In order to solve the friction and wear problem between coiled tubing and casing inner wall when running and tripping of horizontal Wells.The friction and wear of coiled tubing during running and tripping of horizontal Wells was studied by referring to the idea of drillpipe-casing wear model and adopting the"wear-efficiency"model,then the calculation method and formula of the wear depth of coiled tubing outer wall were obtained.The influence of sensitivity factors such as outer diameter,wall thickness,steel grade and wear rate on the residual internal compressive strength of worn coiled tubing was analyzed by using ANSYS Workbench finite element software.Studies have shown that the first yielding position of the worn coiled tubing is different with different wear rates.When the wear rate ofΦ44.45mm×3.96mm of QT-900 coiled tubing ranges from 0%to 25%,the residual internal compressive strength decreases by 35%.The residual internal compressive strength of worn coiled tubing increases non-linearly with the increase of wall thickness and steel grade,and decreases non-linearly with the increase of outer diameter and wear rate.The wear rate has the strongest effect on the residual internal compressive strength of coiled tubing.The research results can provide guidance for the construction parameters of coiled tubing after wear.

关 键 词：连续管 磨损程度 剩余强度 有限元 敏感性分析 

分 类 号：TH16[机械工程—机械制造及自动化] TE93[石油与天然气工程—石油机械设备] TH114TH6