Percentage of bit nozzle pressure loss

Input(s)

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

P: Surface Pressure (psi)

Output(s)

$\% \psi \mathrm{b}$: Percent Pressure Loss (fraction)

Formula(s)

$$ \% \psi \mathrm{b}=\left(\frac{\mathrm{P}_{\mathrm{b}}}{\mathrm{P}}\right) * 100 $$

Reference(s)

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