Cost of Drilling Per Foot Formula
|
| \( C_d \;=\; \dfrac{ ( C_b + C_{to} + C_m ) + ( T_d + T_t + T_c ) \cdot ( C_r + C_s + C_t ) }{ F \cdot T_d }\) |
| Symbol |
English |
Metric |
| \( C_d \) = Cost of Drilling per Foot |
\(cost\;/\;hr \) |
- |
| \( C_b \) = Bit Cost |
\( cost \) |
- |
| \( C_{to} \) = Tool Cost |
\( cost \) |
- |
| \( C_m \) = Mud Cost |
\( cost \) |
- |
| \( T_d \) = Drilling Time |
\(hr\) |
- |
| \( T_t \) = Trip Time |
\(hr\) |
- |
| \( T_c \) = Connection Time and Extras |
\(hr\) |
- |
| \( C_r \) = Rig Rate |
\( cost\;/\;hr \) |
- |
| \( C_s \) = Support Rate |
\( cost\;/\;hr \) |
- |
| \( C_t \) = Tool Rental Rate |
\( cost\;/\;hr \) |
- |
| \( F \) = Footage |
\( ft\;/\;hr \) |
- |
