Table 2 Range of intervals for the values of the coefficients of rate of penetration equation.
From: An analytical model for quantitative evaluation of friction drag in directional sliding drilling
Model | Formula | Parameter Settings | |
|---|---|---|---|
Variable | Interval | ||
MSE | \(\frac{{13.33 \cdot \mu \cdot RPM}}{{{D_B} \cdot \left( {\frac{{CCS}}{{EF{F_M} \cdot WOB}} - \frac{1}{{{A_B}}}} \right)}}\) | \(\mu\) | (0,1) |
\({D_B}\) | Bit Size(inches) | ||
Rock Breaking Efficiency | (0.001,0.5) | ||
Variable | Interval | ||
Motahhari | \({W_f} \cdot \left( {\frac{{G \cdot RP{M^y} \cdot WO{B^\alpha }}}{{{D_B} \cdot S}}} \right)\) | G | (0.001) |
\(\alpha\) | (-10,100) | ||
\(\gamma\) | (-10,100) | ||
