摘要
针对降落中的虹吸测斜 仪与钻具内壁所形成的仪 器环 空的特 点，应用 粘性流 体层 流的运 动规律， 建立了 仪器环空内流体运动的微分方程，推导 出了速度分布、速度梯度、流量、平 均流速、压差及雷 诺数的精 确表达式 ，并通过 受力分析 获得了仪器自由降落速度的层流解 析解． 同时 ，定义了仪器环空断 面阻降系 数，制作 了相应的 表格，系 数值越大 ，仪器环空断面面积越小，仪器环空阻降 力越强，在同一种钻井液中的降速 越慢． 应用示例表明：当 Ｒｅ ＜ ２ １００ 时 ，仪器环空内流体流动为层流．
Considering the character of the apparatus annulus formed by the falling siphon\|measuring slant apparatus and the inner wall of drilling rod, based on the rule of the laminar flow of viscous fluid, the differential motion equations of the fluid in the apparatus annulus are constructed. The velocity profile function, velocity gradient, flow rate, average velocity, pressure drop and exact expression of Reynolds number are derived. Finally, through force analysis, the analysis solution to the free\|fall velocity of the laminar flow of the apparatus is obtained. Meanwhile, the coefficient of resistance to the pressure drop on the annular cross section of the apparatus is defined, appropriate table is listed and an applied example is given.
出处
《大庆石油学院学报》
EI
CAS
北大核心
1999年第3期19-22,共4页
Journal of Daqing Petroleum Institute
关键词
虹吸测斜仪
自由降落速度
井眼
测量
钻井
油井
siphon\|measuring slant apparatus
apparatus annulus
laminar flow
free\|fall velocity
coefficient of resistance to pressure drop on the annular cross section
