Maximum drilling rate - Larger holes
Input(s)
MW \(_{\mathrm{o}}\): Mud Weight out (ppg)
\(\mathrm{MW}_{\mathrm{i}}\): Mud Weight in (ppg)
\(\mathrm{q}_{\mathrm{c}}\): Circulation Rate \((\mathrm{gpm})\)
\(\mathrm{D}_{\mathrm{h}}\): Hole Size (in.)
Output(s)
MDR: Maximum Drilling Rate (ft/h)
Formula(s)
\[
\mathrm{MDR}=\frac{67 *\left(\mathrm{MW}_{\mathrm{o}}-\mathrm{MW}_{\mathrm{i}}\right) * \mathrm{q}_{\mathrm{c}}}{\mathrm{D}_{\mathrm{h}}^{2}}
\]
Reference(s)
Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition, Gulf Professional Publishing, Page: 19.