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.