Drilling EngineeringDrilling Hydraulics
Drill Pipe or Drill Collar Capacity Formula
Drill Pipe or Drill Collar Capacity calculates drill pipe or drill collar capacity for drilling hydraulics workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (ID) are known and the assumptions behind the cited drilling hydraulics 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, C equals 0.015543 bbl/ft.
IDin
4
Inputs
ID
inInner Diameter
Outputs
C
bbl/ft
Drill Pipe or Drill Collar Capacity
ID
in
Inner Diameter
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 25.
Source