井下管柱局部强迫振动对轴向力传递效率的影响

发布时间：2018-03-12 23:00

本文选题：水平井　切入点：管柱　出处：《东北石油大学学报》2017年03期 　论文类型：期刊论文

【摘要】：大位移水平井管柱下放时需要克服管柱与井壁之间的摩阻力,限制作业管柱的入井深度及大位移水平段的延伸距离,振动工具虽然可以在一定程度上降低管柱摩阻力,但其工程应用依据还不充分。根据不同工况,运用数值仿真方法,分析横向、轴向、扭转及其组合振源对管柱轴向力传递效率的影响规律。结果表明,单一振源对管柱轴向力传递效率在12.5%~64.5%之间,其中效果显著的振源频率为1Hz、线位移幅值为3mm的横向X振动或角位移幅值为π/6的扭转振动,计算得到两种及三种振源组合传递效率在44.0%~85.0%之间;两种振源的最佳组合为轴向加扭转,最大传递效率为74.0%,三种振源的最佳组合为横向X加轴向加扭转,最大传递效率为85.5%;比单一振源提升21.0%~31.5%,其中无间隙状态下提升幅度最大。该结果可为大位移水平井作业管柱振动减阻技术的应用提供技术参考。
[Abstract]:It is necessary to overcome the frictional resistance between the string and the shaft wall when the pipe string is lowered, and to limit the depth of the working string and the extended distance of the horizontal section of the extended displacement. Although the vibration tool can reduce the friction of the string to a certain extent, However, the engineering application is not sufficient. According to different working conditions, the influence of transverse, axial, torsional and combined vibration sources on the axial force transfer efficiency of pipe string is analyzed by numerical simulation method. The axial force transfer efficiency of a single vibration source to the string is between 12.5% and 64.5%, in which the effective vibration source frequency is 1Hz, the transverse X vibration with a linear displacement amplitude of 3 mm or the torsional vibration with the angular displacement amplitude 蟺 / 6. The results show that the transfer efficiency of two or three kinds of combination is between 44.0% and 85.0%, the best combination of two kinds of vibration sources is axial torsion, the maximum transfer efficiency is 74.0, the best combination of three kinds of vibration sources is transverse X plus axial torsion. The maximum transfer efficiency is 85.5, 21.0% higher than that of a single vibration source, 31.5% higher than that of a single vibration source, among which the lifting amplitude is the largest in the condition of no gap. The results can provide a technical reference for the application of vibration drag reduction technology in long reach horizontal wells.
【作者单位】：东北石油大学机械科学与工程学院;大庆油田创业集团华谊实业公司;
【基金】：国家自然科学基金项目(51674088)
【分类号】：TE921

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