Maximum Drilling Rate
Maximum Drilling Rate - Large hole formula |
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| \( MDR \;=\; 67 \; ( MW_o - MW_i ) \; C_r \;/\; D_h^2 \) | ||
| Symbol | English | Metric |
| \( MDR \) = maximum drilling rate | \(ft\;/\;hr \) | - |
| \( MW_o \) = mud weight out (ppg) | \(lbm \;/\; gal\) | - |
| \( MW_i \) = mud weight in (ppg) | \(lbm \;/\; gal\) | - |
| \( C_r \) = circulation rate (gpm) | \(gal \;/\; min\) | - |
| \( D_h \) = drill hole size | \(in\) | - |
Tags: Drilling