摘要
为了解决水平井、大位移井等复杂井钻进过程中出现的大摩阻、钻压拖拽等问题,设计了一种新型水力振荡器。根据水力振荡器的内部结构和工作特性,结合流体力学原理,对水力振荡器过流面积、压降、总轴向力关键力学参数的变化规律进行理论分析。选取某一规格水力振荡器的不同静阀孔径进行算例分析,结果表明在水力振荡器输入流量和入口压力一定时,静阀孔径大小与过流面积呈正比,与压降、总的轴向力呈反比;此外,通过改变流量至25L/s,进一步分析水力振荡器关键参数的变化规律。研究结论可为水力振荡器轴向振动分析提供理论支撑,为实现水力振荡器减摩降阻的功能提供技术指导。
To solve the problems of large friction and weight of bit（WOB ） drag in drilling a horizontal well, large displace well and other complex wells,a new type of hydraulic oscillator is desigued.According to the internal structure and working characteristics of the hydraulic oscillator,and combined with the fluid mechanics principle, the change rules of hydraulic oscillator pressure drop, flow area, and total axial force are analyzed in theory. By analyzing a size of hydraulic oscillator with different static valve diameters,the results shows that when the input flow and inlet pressure are constant, the static valve diameter is proportional to the flow area, and inversely proportional to the pressure drop and total axial force ; Besides, the change rules of the three key parameters are further analyzed by regulating the flow to 25L/s.The research conclusions can provide the theoretical support for the axial vibration analysis of hydraulic oscillator and the technique guide for realizing the drag reduction funetion.
出处
《机械设计与制造》
北大核心
2017年第1期87-90,共4页
Machinery Design & Manufacture
基金
基金项目:中石化集团公司先导科技项目-水力振荡器工具先导性试验(JPJ11003)
关键词
内部结构
工作特性
压降
过流面积
轴向力
水力振荡器
Internal Structure
Working Characteristics
Pressure Drop
Flow Area
Axial Force
Hydraulic Oscillator
