d exponent calculator
enter the value and click "calculate", the calculation result will be displayed.
`d=([log R/[60×N]]/[log [12×W]/[1000×D]])×(ρ_n/ρ_m)^c `
r = permeability n = rotational speed
w = bit weight d = drill diameter
ρn = mud weight equivalent ρm = weight of mud used
c = shale compaction coefficient