Bit nozzle pressure loss

Input(s)

$\mathrm{N}_{\mathrm{a}}$: Nozzle Area (in. ${ }^{2}$ )

Q: Flow Rate (gpm)

MW: Mud Weight (ppg)

Output(s)

$\mathrm{P}_{\mathrm{b}}$: Bit Nozzle Pressure Loss (psi)

Formula(s)

$$ \mathrm{P}_{\mathrm{b}}=\left(\mathrm{Q}^{2}\right) * \frac{\mathrm{MW}}{10858 *\left(\mathrm{~N}_{\mathrm{a}}\right)^{2}} $$

Reference(s)

Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition, Gulf Professional Publishing, Page: 165.