Plug length to set a balanced cement plug

Input(s)

$\mathrm{N}_{\mathrm{s}}$: Number of Sacks of Cement to be Used (stroke)

AC: Annular Capacity $\left(\mathrm{ft}^{3} / \mathrm{ft}\right)$

$\mathrm{P}_{\mathrm{c}}$: Pipe or Tubing Capacity $\left(\mathrm{ft}^{3} / \mathrm{ft}\right)$

E: Original+extra Volume Req in Percentage (fraction) $\mathrm{Y}_{\mathrm{s}}$ :Yield of Slurry $\left(\mathrm{ft}^{3} /\right.$ stroke $)$

Output(s)

$\mathrm{L}_{\mathrm{p}}$: Length of Plug (stroke)

Formula(s)

Reference(s)

Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition, Gulf Professional Publishing, Page: 61.