Maximum Weight of a Bit
Maximum weight of a Bit formula |
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\( WOB \;=\; L_c \; W_c \; BF \; cos(\alpha) \;/\; SF \) (Maximum Weight of a Bit) \( L_c \;=\; WOB \; SF \;/\; W_c \; BF \; cos(\alpha) \) \( W_c \;=\; WOB \; SF \;/\; L_c \; BF \; cos(\alpha) \) \( BF \;=\; WOB \; SF \;/\; L_c \; W_c \; cos(\alpha) \) \( cos(\alpha) \;=\; WOB \; SF \;/\; L_c \; W_c \; BF \) \( SF \;=\; L_c \; W_c \; BF \; cos(\alpha) \;/\; WOB \) |
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| Symbol | English | Metric |
| \( WOB \) = maximum weight of a bit | \(lbf\) | - |
| \( L_c \) = length of drill collar | \(ft\) | - |
| \( W_c \) = weigth of drill collar | \(lbf\) | - |
| \( BF \) = bouyancy factor | \(dimensionless\) | - |
| \( \alpha \) (Greek symbol alpha) = wellbore inclination | \(rad\) | - |
| \( FS \) = safety factor | \(dimensionless\) | - |
Tags: Drilling Drilling Bit