摘要
在石油钻采工程中,受旋转杆管柱的作用,流体做偏心环空螺旋流动,其流动特性及界面力影响杆管柱的运动状态及安全性.以牛顿流体为研究对象,建立牛顿流体等截面偏心和变截面偏心的三维有限元模型,对牛顿流体偏心环空螺旋流进行数值模拟,分析偏心度和转速对流动特性及界面力的影响.结果表明:随着偏心度和转速的增大,界面横向力增大,轴向力几乎不变,弯矩和转矩逐渐增大.该结果可为定向井、水平井钻井施工中的水力参数设计提供参考.
In the oil drilling project,under the action of the rotating rod string,the fluid in eccentric annulus helical flow,the flow characteristics and interface force affect the motion state of rod string and safety evaluation.In this paper,Newtonian fluid as the research object,we established a three-dimensional finite element model for Newtonian fluid by uniform section eccentric and variable cross-section eccentric.Numerical simulation of the helical flow of Newtonian fluid in eccentric annulus,the flow characteristics and interface force affected by eccentricity and rotation velocity are studied emphatically.The results showed that the interface lateral force will be increased but the axial force is almost unchanged with the increase of the eccentricity and rotation velocity.Moment and torque are increased gradually.This study will provide reference for directional wells,horizontal well drilling operation and hydraulic parameter design.
出处
《大庆石油学院学报》
CAS
北大核心
2010年第1期63-67,79,共6页
Journal of Daqing Petroleum Institute
基金
国家自然科学基金项目(10672037)
关键词
牛顿流体
偏心度
转速
偏心环空螺旋流
Newtonian fluid
eccentricity
rotation velocity
eccentric annulus helical flow
作者简介
罗敏（1968-），女，博士，教授，主要从事计算力学方面的研究
