幂律钻井液管流的f因子

Determining the Fanning friction factors of power-law drilling fluid flow in pipe and annular

依据幂律流体层流运动的基本规律和修正的Blasius紊流阻力公式,利用当量直径和当量雷诺数的概念,推导出两种流态(层流和紊流)、三种过流断面(圆形、同心环空及偏心环空)六种不同形式f因子的数学表达式,为幂律钻井液管流摩阻的实用计算提供了理论依据和简捷方法。

Based on the basic laws of laminar flow of power-law fluid and Blasius' formula of turbulent drag, six different Fanning friction factors of two flow types (laminar and turbulent flow), and three flow cross sections (circular, concentric and eccentric annular) are inferred by the concepts of equivalent diameter and Reynolds. This is helpful in counting the friction drag of power-law drilling fluid in drill pipe and annu- ?lar.