Hydrostatic pulling wet pipe out of the hole
Input(s)
NS: Number of Stands Pulled (number)
Lavg: Average length per stand (ft)
mw: Mud Weight (ppg)
cc: Casing Capacity (bbl/ft)
\(\mathrm{pd}\): Pipe disp. (bbl/ft)
pc: Pipe capacity. (bbl/ft)
Output(s)
BD: Barrel Displaced (bbl)
HP: Hydrostatic Pressure Decrease (Pulling Wet Pipe out of the Hole) (psi)
Formula(s)
\[
\begin{gathered}
B D=N S * \operatorname{Lavg} *(p d+p c) \\
H P=B D * 0.052 * \frac{m w}{c c-(p d+p c)}
\end{gathered}
\]
Reference(s)
Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 21.