# Drilling ton miles - Round trip ton miles

## Input(s)

$$\mathrm{W}_{\mathrm{p}}$$: Buoyed Weight of Drill Pipe $$(\mathrm{lb} / \mathrm{ft})$$

D: Depth of Hole (ft)

$$\mathrm{L}_{\mathrm{p}}$$: Length of One Stand of Drill Pipe (ft)

$$\mathrm{W}_{\mathrm{b}}$$: Weight of Travelling Block (lb)

Wdc: Weight of Drill Collar Per Feet (lb/ft)

Wdp: Drill Pipe Weight Per Feet (lb/ft)

L: Drill Collar Length $$(\mathrm{ft})$$

BF: Buoyancy Factor (dimensionless)

## Output(s)

$$\mathrm{W}_{\mathrm{c}}$$: Buoyed Weight of Drill Collars-buoyed Weight of Drill Pipe (lb)

$$\mathrm{RT}_{\mathrm{TM}}$$: Round Trip Ton Miles (ton miles)

## Formula(s)

$\begin{gathered} \mathrm{W}_{\mathrm{c}}=\mathrm{L} * \mathrm{BF} *(\mathrm{Wdc}-\mathrm{Wdp}) \\ \mathrm{RT}_{\mathrm{TM}}=\frac{\mathrm{W}_{\mathrm{p}} * \mathrm{D} *\left(\mathrm{~L}_{\mathrm{p}}+\mathrm{D}\right)+(2 * \mathrm{D}) *\left(2 * \mathrm{~W}_{\mathrm{b}}+\mathrm{W}_{\mathrm{c}}\right)}{5280 * 2000} \end{gathered}$

## Reference(s)

Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition, Gulf Professional Publishing, Page: 44.

## Related

### Drilling ton miles - Setting casing ton miles

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