# Total number of sacks of tail cement required

## Input(s)

\(\mathrm{N}_{\mathrm{a}}\): Sacks Required by Annulus (unitless)

\(\mathrm{N}_{\mathrm{c}}\): Sacks Required by Casing (unitless)

## Output(s)

N: Total Number of Sacks of Tail Cement Required (unitless)

## Formula(s)

\[
\mathrm{N}=\mathrm{N}_{\mathrm{a}}+\mathrm{N}_{\mathrm{c}}
\]

## Reference(s)

Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition, Gulf Professional Publishing, Page: 55.