D Exponent Formula - Classical Physics

Formula


d = [ (log ( R / (60 × N) ) / log ( (12 × W) / (1000 × D) ) ] × ( Pn / Pm )c

Where,

d = d-exponent value
R = Penetration Rate
N = Rotary Speed
W = Weight on Bit
D = Drill Bit Diameter
Pn = Mud Weight Equivalent
Pm = Mud Weight Used
C = Shale Compactibility Coefficient

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