Subsea considerations - Casing burst pressure-subsea stack

Input(s)

YP: Internal Yield Pressure (psi)

SF: Safety Factor (fraction)

$W_{u}$: Mud Weight in use (ppg)

$\mathrm{H}$: Depth from Rotary Kelly Bushing to Mudline (ft)

$H_{s}$: Depth of Seawater $(\mathrm{ft})$

$W_{s}$: Seawater Weight $(\mathrm{ppg})$

Output(s)

$Y P_{c}$: Corrected Internal Yield Pressure (psi)

HP: Hydrostatic Pressure of Mud in Use (psi)

$H P_{s w}$: Hydrostatic Pressure exerted by sea water (psi)

CBP: Casing Burst Pressure (psi)

Formula(s)

$$ \begin{gathered} Y P_{c}=Y P * S F \\ H P=W_{u} * 0.052 * H \\ H P_{s w}=H_{s} * 0.052 * W_{s} \\ \mathrm{CBP}=Y P_{c}-H P+\left(H P_{s w}\right) \end{gathered} $$

Reference(s)

Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 146.