Stripping/snubbing calculations - Minimum surface pressure before stripping
Input(s)
\(W_{c}\): Weight per feet of one stand of Drill Collar (lb/ft)
\(\mathrm{L}\): Length of one stand (feet)
D: Drill Collar Dia (in.)
Output(s)
\(P_{\min }\): Minimum surface Pressure before stripping is possible (psi)
Formula(s)
\[
P_{\min }=W_{c} * \frac{L}{D^{2} * 0.7854}
\]
Reference(s)
Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 141.