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中文摘要：
在大位移井、水平井中，无论是常规管柱还是连续管作业时，由于管柱与井壁接触面大、管柱不旋转等因素，管柱与井壁之间摩阻都很大。井下振动减摩技术利用流体能量通过一定方式使管柱产生振动，从而减小管柱与井壁之间的摩擦力，增加钻头的有效钻压，提高机械钻速，延伸管柱入井位移，可有效降低油田开发成本。介绍了连续管减摩器、声波流动脉冲方法和装置、轴向振荡发生器、降摩阻短节、井下振动减摩器以及水力振动减摩加压器等国内外各种井下振动减摩技术和装置，包括原理、结构设计、特性研究以及现场应用等方面。随着我国复杂结构井的钻井和后续作业陆续出现管柱与井壁摩阻大的问题，对减摩技术的需求也越来越多，井下振动减摩技术发展前景广阔。
英文摘要：
There is a remarkable friction between string and borehole wall due to the large contact surface between string and borehole wall when conventional string or coiled tubing is in operation in horizontal and extended-reach wells. The downhole vibration friction-reducing technology makes use of fluid energy to make the string vibrate in a certain way so as to reduce the friction between string and borebole wall, increase the effective WOB, improve the rate of penetration and extend the displacement of string in the well. This can effectively decrease the development costs of oilfields. The paper introduces all kinds of downhole vibration antifriction technologies and devices at home and abroad, such as CT friction drag reducer, acoustic flow pulse method and device, axial oscilla- tion generator tool, friction drag decreasing sub, downhole vibration friction reducer and hydraulic vibration antifriction thruster from the aspects of principle, structural design and characteristic research. A great deal of field application of the axial oscillation generator has been conducted, achieving the desirable effect.
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