Mud weight increase required to balance pressure

Input(s)

F: Differential Force (lb)

A: Area Below Casing Shoe (in. ${ }^{2}$ )

$\mathrm{L}_{\mathrm{c}}$: Casing Length $(\mathrm{ft})$

Output(s)

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

Formula(s)

$$ \mathrm{W}_{\mathrm{m}}=\frac{\mathrm{F}}{\mathrm{A} * 0.052 * \mathrm{~L}_{\mathrm{c}}} $$

Reference(s)

Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition, Gulf Professional Publishing, Page: 67.