Velocity of fluid in annulus
Input(s)
\(Q\): Flow rate \((\mathrm{gpm})\)
\(D_{o}\): Open Hole Diameter (in.)
\(D_{p}\): Outside Diameter of Pipe (in.)
Output(s)
\(v_{a}\): Velocity of Fluid in Annulus (ft/s)
Formula(s)
\[
v_{a}=\frac{Q}{2.448 *\left(D_{o}^{2}-D_{p}^{2}\right)}
\]
Reference(s)
Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015. Houston, Texas, Page: 321.