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.