The Cost of Bore Drilling calculator computes the cost per unit length for a core drilled and recovered.
INSTRUCTIONS: Choose units and enter the following:
- (Cb) This is the cost of core bit
- (Cs) This is the cost of coring service from a service company
- (Cr,) This is the rig day rate
- (tt) This is the trip time
- (tc,) This is the core recovering time
- (trc) This is the core barrel handling time
- (L) This is the length of core recovered
- (Rc) This is the percentage of core recover
Cost Per unit Length(Cc): The calculator returns the cost in U.S. dollars per foot. However this can be automatically converted to compatible units (e.g. Euro/meter) via the pull-down menu.
Related Calculators
The Math / Science
The formula to compute the cost per length recovered in a bore rock drill in the well is:
`C_c = ((C_b+C_s+C_r*(T_t+T_c+T_(rc)))/L)* 1/(R_c)`
Where:
- Cc = coring cost per foot
- Cb = cost of core bit
- Cs = cost of coring service from a service company
- Cr = rig day rate
- tt = trip time
- tc = core recovering time
- trc = core barrel handling time
- L = length of core recovered
- Rc = percentage of core recover
Figure 1: Coring cost equation