Drilling ton miles - Coring operation ton miles

Input(s)

$\mathrm{T}_{4}$: Ton Miles for One Round Trip-depth Where Coring Stopped Before Coming out of Hole (ton miles)

$\mathrm{T}_{3}$: Ton-miles for One Round Trip-depth Where Coring Started After Going in Hole (ton miles)

Output(s)

$\mathrm{T}_{\mathrm{c}}$: Coring Operation Ton Miles (ton miles)

Formula(s)

$$ \mathrm{T}_{\mathrm{c}}=2 *\left(\mathrm{~T}_{4}-\mathrm{T}_{3}\right) $$

Reference(s)

Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition, Gulf Professional Publishing, Page: 46