Depth of a Washout - Method 2 Calculator
Enter the declared drilling engineering inputs below to solve D_w. Variable definitions, units, the default calculation, and the available source trail are included on this page.
What is available in this record
This record provides the functioning calculator, formula, declared variables and units, a reproducible default result, and the available citation metadata. A separately written engineering interpretation has not yet been published for this calculation.
Formula, variables, and default calculation
Reproducible default result
With the default values shown below, the calculation returns D_w = 796.178344 ft. Defaults demonstrate the implementation; they are not recommended field values.
500
0.1
0.0178
0.045
Input definitions
N_s
strokesNumber of Strokes Required
P_o
bbl/strokePump Output per Stroke
C_p
bbl/ftDrillpipe Capacity
C_a
bbl/ftAnnular Capacity
Output definitions
D_w
Depth of Washout
N_s
Number of Strokes Required
P_o
Pump Output per Stroke
C_p
Drillpipe Capacity
C_a
Annular Capacity
Source and record status
Source metadata identifies the relationship implemented by the calculator. Check the cited edition, unit basis, and scope against the engineering case before operational use.
Formulas 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 70.
Open source reference