Drilling EngineeringDrilling Hydraulics
Maximum Drilling Rate for Larger Holes Formula
Maximum Drilling Rate for Larger Holes calculates maximum drilling rate for drilling hydraulics workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (MW_o, MW_i, q_c, D_h) 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, MDR equals 53.577676 ft/h.
MW_oppg
10.2
MW_ippg
10
q_cgpm
600
D_hin
12.25
Inputs
MW_o
ppgMud Weight Out
MW_i
ppgMud Weight In
q_c
gpmCirculation Rate
D_h
inHole Size
Outputs
MDR
ft/h
Maximum Drilling Rate
MW_o
ppg
Mud Weight Out
MW_i
ppg
Mud Weight In
q_c
gpm
Circulation Rate
D_h
in
Hole Size
Source and review
reviewedLapeyrouse, N.J. 2002. Formulas and Calculations for Drilling, Production and Workover, 2nd Edition, Page 19.
Source