Rock removal rate

Input(s)

$d_{b}$: Bit Diameter (in.)

$R$: Penetration Rate $(\mathrm{ft} / \mathrm{h})$

Output(s)

$q_{r}$: Rock Removal Rate $(\mathrm{SCF} / \mathrm{min})$

Formula(s)

$$ q_{r}=\frac{\pi}{4} \frac{d_{b}^{2} R(12)}{(1,728)(60)}=\frac{d_{b}^{2} R}{11000} $$

Reference(s)

Watson, D., Brittenham, T., \& Moore, P. L. (2003). Advanced Well Control (Vol. 10). Society of Petroleum Engineers., Page: 19.