# Difference in pressure gradient between the cement and mud

## Input(s)

\(\mathrm{W}_{\mathrm{c}}\): Cement Weight \((\mathrm{ppg})\)

\(\mathrm{W}_{\mathrm{m}}\): Mud Weight (ppg)

## Output(s)

PG: Pressure Gradient between Cement and Mud (psi/ft)

## Formula(s)

\[
\mathrm{PG}=\left(\mathrm{W}_{\mathrm{c}}-\mathrm{W}_{\mathrm{m}}\right) * 0.052
\]

## Reference(s)

Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition Gulf Professional, Publishing, Page: 66.