摘要
针对现有水平井轮式牵引器存在的牵引力不足、齿顶磨屑排出不及时易加剧磨损、齿面残留磨屑容易划伤齿面及越障性能差等问题,创新性提出一种仿生耦合驱动轮。根据黏着理论建立了轮式牵引器的轮壁接触模型,推导出犁沟摩擦因数计算表达式;利用数值模拟分析了耦元体直径、嵌入深度与犁沟摩擦因数之间的关系,并在有限元软件Workbench中设定轮壁接触条件为摩擦接触进行动态分析;研究了仿生耦合驱动轮的牵引特性,并与常规驱动轮进行了模拟对比。模拟结果表明:均布的球体结构最大犁沟摩擦因数为0.424,柱体结构的犁沟摩擦因数恒大于方形结构;且当楔深为0.2 mm时,仿生耦合驱动轮犁沟摩擦因数为2.5,传统驱动轮的最大犁沟摩擦因数为1.6,仿生耦合驱动轮相比传统驱动轮牵引能力可提高89%;在相同正压力条件下,仿生驱动轮既不会对管壁造成破坏,也不会影响套管的后续使用,并且比常规驱动轮更易获得较大驱动力。研究结果可为后续轮式牵引器牵引力的提高及驱动轮的优化设计提供一定的理论支持。
In order to solve the problems existing in wheel tractor of horizontal well,such as insufficient traction,delayed discharge of abrasive dusts at tooth top easily aggravating wear,abrasive dusts remained at tooth surface easily scratching tooth surface,and poor obstacle crossing performance,a bionic coupling driving wheel was innovatively proposed.Based on the adhering theory,a wheel-wall contact model of wheel tractor was built,the calculation expression of furrow friction factor was derived,and the numerical simulation was used to analyze the relation between the diameter and embedded depth of coupling element and the furrow friction factor.The wheel-wall contact condition was set as frictional contact in the finite element software Workbench to conduct dynamic analysis,and the tractive characteristics of the bionic coupling driving wheel were studied and compared in numerical simulation with those of the conventional driving wheel.The simulation results show that the maximum furrow friction factor of the uniformly distributed spherical structure is 0.424,the furrow friction factor of the cylindrical structure is always greater than that of the square structure.When the wedge depth is 0.2 mm,the furrow friction factor of the bionic coupling driving wheel is 2.5,that of the traditional driving wheel is 1.6,and the tractive capacity of bionic coupling driving wheel is enhanced by 89%than that of traditional driving wheel.Under the condition of the same positive pressure,the bionic driving wheel neither damages the pipe wall nor affects the subsequent use of the casing,and is easier to obtain a larger driving force than the conventional driving wheel.The study results provide certain theoretical support for the subsequent improvement of the traction of wheel tractor and the optimization design of the driving wheel.
作者
吴伟
李超
魏航信
王金超
王方
Wu Wei;Li Chao;Wei Hangxin;Wang Jinchao;Wang Fang(Mechanical Engineering College,Xi'an Shiyou University)
出处
《石油机械》
北大核心
2022年第10期119-126,共8页
China Petroleum Machinery
基金
西安石油大学研究生创新与实践能力培养计划立项项目(YCS21213232)。
关键词
轮式牵引器
驱动轮
越障
脱黏减附
仿生耦合
摩擦因数
wheel tractor
driving wheel
obstacle crossing
abhesion and desorption
bionic coupling
friction factor
