Drilling and Connection Ton Miles Formula
Drilling and Connection Ton Miles calculates drilling and connection ton miles for drillstring and rig mechanics workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (T_2, T_1) are known and the assumptions behind the cited drillstring and rig mechanics relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, T_D equals 180 ton miles.
560
500
Inputs
T_2
ton milesRound-trip ton miles at depth where drilling stopped
T_1
ton milesRound-trip ton miles at depth where drilling started
Outputs
T_D
Drilling and connection ton miles
T_2
Round-trip ton miles at depth where drilling stopped
T_1
Round-trip ton miles at depth where drilling started
Source and review
reviewedFormulas and Calculations for Drilling, Production and Workover, Lapeyrouse, N.J. (2002)
Lapeyrouse, N.J. 2002. Formulas and Calculations for Drilling, Production and Workover, 2nd Edition, Gulf Professional Publishing, Page 46.
Source