Annular velocity for a given circulation rate
Input(s)
Q: Circulation Rate (gpm)
\(\mathrm{d}_{\mathrm{h}}\): Inner Diameter of Casing (in.)
\(\mathrm{d}_{\mathrm{p}}\): Outer Diameter of Casing (in.)
Output(s)
AV: Annular Velocity (ft/min)
Formula(s)
\[
\mathrm{AV}=\frac{24.5 * \mathrm{Q}}{\left(\mathrm{d}_{\mathrm{h}}^{2}-\mathrm{d}_{\mathrm{p}}^{2}\right)}
\]
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: 21.