Ø127型水力振荡减摩装置的研制及特性分析

Development and characteristic analysis of Ø127 hydraulic oscillation friction reduction tool

摘要:

针对水平井、定向井等钻井过程中摩阻大、托压等问题，研制了?127型水力振荡减摩装置，可减小管柱与井壁或套管壁之间的摩擦力，有效改善钻压传递，延伸大位移井、长水平井等井眼长度，提高机械钻速。首先分析了水力振荡减摩钻井技术机理，对水力振荡减摩装置的主要部件进行了技术分析，介绍了该装置的工作原理。通过数值模拟、室内试验和现场试验相结合的方法，验证了减摩装置设计的可行性和振动的稳定性。研究结果表明，该装置性能可靠，其脉动压力频率和幅值、轴向振动位移均随排量的增大而增大。研究成果可为钻井减摩降阻、提高机械钻速等相关技术与工具研究提供参考。

Abstract:

With regard to the challenges of high friction， drag force， etc. during drilling directional and horizontal wells， ??127 hydraulic oscillation friction reduction tool was developed， which is able to effectively reduce the friction force between the drill string and the wellbore or inner wall of casing， improve weight on bit transfer， extend the length of directional and horizontal sections， and increase the rate of penetration. The mechanism of hydraulic oscillation antifriction drilling technology is introduced. The main parts of the tool are analyzed， and the operating principle is studied. The feasibility and the vibration stability of the tool were verified by numerical simulation， laboratory test and field test. The results showed that the performance of the device was reliable， and the hydraulic pulse frequency， pressure fluctuation amplitude and axial vibration displacement increased with flow rates. The results can provide references for research and development of related drilling tools and technologies for friction reduction， ROP improvement， etc.