随钻测量仪扶正器的流场数值模拟与分析  

Numerical Simulation and Analysis for the Flow Field of the Centralizer in Measurement While Drilling Apparatus

作　　者：赵博[1,2] 史宏江[2] 孙雪冬[3] 张勇[2] 李铁军[2] 

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]北京石油机械厂,北京100083 [3]大庆油田有限责任公司第八采油厂,黑龙江大庆163514

出　　处：《石油矿场机械》2016年第4期19-24,共6页Oil Field Equipment

基　　金：国家自然科学基金重点资助项目(51134004)

摘　　要：为了解决随钻测量仪橡胶扶正器受到泥浆的冲蚀造成脱落失效的问题,应用流体力学模拟软件对扶正器在钻铤水眼中的流场进行数值模拟和分析。通过模拟不同扶正器的导流角、过流截面、迎流面坡度等结构参数以及变换不同钻井液密度和黏度的情况,得到了流场压力与速度矢量的变化趋势。结果表明:冲击压力随扶正翼导流角和迎流面坡度减小以及过流截面积的增大而减小;钻井液密度和黏度的增加,冲击压力增大;在合理的钻井液密度和黏度条件下,减小扶正翼导流角和迎流面坡度、增大过流截面,能降低流阻,提高扶正器的抗冲蚀能力。To solve the problem of shed and invalidation of the centralizer caused by drilling mud e-rosion in measurement while drilling apparatus,the fluid dynamics analysis software was applied to conduct a numerical simulation and analysis for the flow field of the Centralizer in the non-mag-netic drill collar.The variation trend of flow field pressure and velocity has obtained by simulating different structural parameters of centralizer wing including diversion angle,flow section,slope of incident flow and the different drilling fluid density and viscosity.The research findings show that the impact pressure and the maximum velocity of the centralizer between centralizer wing decrea-ses with the decrease of diversion-angle and slope of incident flow of the centralizer wing and de-creases with the increase of slope of incident flow.The impact pressure increases with the increase of drilling fluid density and viscosity.Therefore,reducing the diversion angle and slope of incident flow and increasing the flow section can be reduced the flow resistance and improved the erosion resistibility of centralizer under the condition of reasonable drilling fluid density and viscosity.

关 键 词：随钻测量 扶正器 数值模拟 流场分析 

分 类 号：TE927.6[石油与天然气工程—石油机械设备]