摘要
针对大位移井和水平井钻柱与井壁摩阻大的问题,提出一种具有轴向振动减摩作用的水力振荡器。在水力振荡器结构设计、工作原理分析的基础上,建立其运动方程和力学特征模型,确定马达转子和动阀板运动关系,进行马达转子和阀片部分的受力分析,并建立水力振荡器在水平井的振动方程。通过算例分析得到过流面积变化频率与流量成正比,过流面积随静阀孔直径增大而增大,总轴向力随静阀孔直径增大而减小,振动位移随静阀孔直径、安装位置和井壁摩擦系数的增大而减小。现场试验表明,水力振荡器的使用可以减小井壁摩擦,改善钻压传递,钻井提速效果明显。
Aiming at the problem of large friction between the drill string and borehole, a hydraulic oscillator ofaxial vibration antifriction was put forward in this paper. According to the working principles and structural design ofhydraulic oscillator, its equations of motion and mechanical properties were analyzed, and the vibration equation ofhydraulic oscillator was established in the horizontal well. The analysis of calculation example indicated thefrequency of flow area change was proportional to the flow rate, the flow area increased with the increase of thestatic valve hole diameter, the total axial force decreased with the increase of the static valve hole diameter, thevibration displacement decreased with the increase of static valve hole diameter and installation location andcoefficient of friction. The conclusions provide importantapplications of hydraulic oscillator.references for reducing friction, increasing speed and field
出处
《机械科学与技术》
CSCD
北大核心
2017年第5期690-696,共7页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51674216)
国家科技重大专项(2016ZX05038)
国家留学基金项目(201608515039)资助
关键词
水力振荡器
振动
钻井
提速
水平井
摩擦
hydraulic oscillator
vibrations
drilling
friction
design
mechanical properties
equations of motion
calculation
