Annular velocity - Using pump output in bbl/min
Input(s)
Q: Circulation Rate (gpm)
\(D_{h}\): Inside Diameter of Casing or Hole Size (in.)
\(D_{p}\): Outside Diameter of Pipe, Tubing or Collars (in.)
Output(s)
AV: Annular Velocity (ft/min)
Formula(s)
\[
A V=\frac{[24.5 * Q]}{\left[\left(D_{h}\right)^{2}-\left(D_{p}\right)^{2}\right]}
\]
Reference(s)
Lyons, W. C., Carter, T., and Lapeyrouse, N. J., 2012, Formulas and Calculations for Drilling, Production and Workover, Third Edition, Gulf Professional Publishing, Page: 10.