井下油管切割工具的设计与力学分析  

Design and mechanical analysis of downhole tubing cutting tool

作　　者：伊西锋 张峰[1] 刘玉国 李玉坤[2] 曹小建 YI Xifeng;ZHANG Feng;LIU Yuguo;LI Yukun;CAO Xiaojian(Sinopec Shengli Oilfield Company,Petroleum Engineering Technology Research Institute,Dongying,Shandong 257088,China;College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580,China)

机构地区：[1]中国石化胜利油田分公司石油工程技术研究院,山东东营257088 [2]中国石油大学(华东)储运与建筑工程学院,山东青岛266580

出　　处：《油气井测试》2023年第6期20-28,共9页Well Testing

摘　　要：油气田开采中后期易发生油管砂埋、砂卡事故,不仅影响单井产量,严重时易造成油水井报废,有效的油管切割工具是应对卡井事故最高效的方法。研制了一套油管切割工具,全套机械系统包含锚固模块、驱动模块和进给模块等部分。建立了锚爪锚固的有限元模型,分析了锚固状态下锚爪和油管的应力与变形情况,并对不同切削速度、进给量、刀尖半径下的切割工具和油管进行了结构强度分析,由仿真结果选择出了最优切削速度、进给量和刀尖半径。最后对切割装置的壳体进行了振动和模态分析,获得了切割工具的固有频率等振动属性。经实验室切割实验,整个切割流程平稳流畅,割刀完整性好,无明显磨损,实验油管管柱断面光滑平整,整体效果良好。该分析为在实际操作中有效避开油管切割工具的共振区间提供了可靠的理论依据。In the middle and later stages of oil and gas field development,accidents such as sand burial and sand jamming of oil pipes are prone to occur,which not only affects the production of a single well,but also causes the scrapping of oil and water wells in severe cases.Effective oil pipe cutting tools are the most efficient way to deal with well jamming accidents.A set of oil pipe cutting tools has been developed,and the complete mechanical system includes anchoring module,driving module,and feeding module.A finite element model of anchor anchorage was established to analyze the stress and deformation of anchor and oil pipe under anchorage state.Structural strength analysis was conducted on cutting tools and oil pipes under different cutting speeds,feed rates,and tool tip radii.The optimal cutting speed,feed rates,and tool tip radii were selected based on the simulation results.Finally,vibration and modal analysis were conducted on the shell of the cutting device,and vibration properties such as the natural frequency of the cutting tool were obtained.Through laboratory cutting experiments,the entire cutting process is smooth and smooth,with good integrity of the cutting blade and no obvious wear.The cross-section of the experimental oil pipe string is smooth and flat,and the overall effect is good.This analysis provides a reliable theoretical basis for effectively avoiding the resonance range of tubing cutting tools in practical operations.

关 键 词：修井作业 井下油管 切割工具设计 切削速度 模态分析 有限元分析 力学分析 

分 类 号：TE931[石油与天然气工程—石油机械设备]