Drilling EngineeringDrilling HydraulicsCalculation record

Depth of a Washout - Method 1 Calculator

D_w=\frac{N_sP_o}{C_p}

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.

Tabular solver

Extended guidance in preparation

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 reference

Formula, variables, and default calculation

D_w=\frac{N_sP_o}{C_p}

Reproducible default result

With the default values shown below, the calculation returns D_w = 2,808.988764 ft. Defaults demonstrate the implementation; they are not recommended field values.

N_sstrokes

500

P_obbl/stroke

0.1

C_pbbl/ft

0.0178

Input definitions

N_s

strokes

Number of Strokes Required

P_o

bbl/stroke

Pump Output per Stroke

C_p

bbl/ft

Drillpipe Capacity

Output definitions

D_w

Depth of Washout

N_s

strokes

Number of Strokes Required

P_o

bbl/stroke

Pump Output per Stroke

C_p

bbl/ft

Drillpipe 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.

reviewed

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