Stripping/snubbing calculations - Maximum Allowable surface pressure governed by casing burst pressure
Input(s)
\(W_{o}\): Mud Weight behind casing (ppg)
\(W_{u}\): Mud Weight in use (ppg)
\(\mathrm{H}\): Casing Shoe TVD \((\mathrm{ft})\)
\(P_{b c}\): Casing Burst Pressure (psi)
S: Safety Factor (e.g., 80% represent 0.8 ) (dimensionless)
Output(s)
MASP: Maximum Allowable Surface Pressure governed by Casing Burst Pressure (psi)
Formula(s)
\[
M A S P=\left(P_{b c} * S\right)-\left(W_{u}-W_{o}\right) * 0.052 * H
\]
Reference(s)
Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 143.