Total-Drill-Cost-Calculator by huanglianjiang1

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									                TDC CALCULATION FOR THE DETERMINATION OF DRILL BIT PERFORMANCE.
                                           Provided by: Varel International.



Total Drill Cost per foot or meter

TDC=      Cost of Bit               +      Cost of Rig / Hour
          Total feet or meters             Bit Penetration Rate


Varel                                                 Brand X


Cost of Bit =                                                     Cost of Bit =

Total Feet or Meters =                                            Total Feet or Meters =

Cost of Rig / Hour =                                              Cost of Rig / Hour =

Bit Penetration =                                                 Bit Penetration =

TDC =                            #DIV/0!                           TDC =                   #DIV/0!
Brand Y                                               Brand Z


Cost of Bit =                                                     Cost of Bit =

Total Feet or Meters =                                            Total Feet or Meters =

Cost of Rig / Hour =                                              Cost of Rig / Hour =

Bit Penetration =                                                 Bit Penetration =

TDC =                            #DIV/0!                           TDC =                   #DIV/0!
                    TDC CALCULATION FOR THE DETERMINATION OF DRILL BIT PERFORMANCE.
                                               Provided by: Varel International.



Total Drill Cost per foot or meter

TDC=        Cost of Bit                 +      Cost of Rig / Hour
            Total Feet or Meters =             Bit Penetration Rate


Varel                                                     Brand X


Cost of Bit =                                                         Cost of Bit =            $1,566.00


Total Feet or Meters =                                                Total Feet or Meters =    25000.00

Cost of Rig / Hour =                                                  Cost of Rig / Hour =       $150.00

Bit Penetration =                                                     Bit Penetration =            240.00

 TDC =                               #DIV/0!                           TDC =                      $0.69
Brand Y                                                   Brand Z


Cost of Bit =                                                         Cost of Bit =

Total Feet or Meters =                                                Total Feet or Meters =

Cost of Rig / Hour =                                                  Cost of Rig / Hour =

Bit Penetration =                                                     Bit Penetration =

 TDC =                               #DIV/0!                           TDC =                   #DIV/0!
                    TDC CALCULATION FOR THE DETERMINATION OF DRILL BIT PERFORMANCE.
                                                    Provided by: Varel International.



Total Drill Cost per foot or meter

TDC=        Cost of Bit                 +           Cost of Rig / Hour
            Total Feet or Meters =                  Bit Penetration Rate


Varel                                                          Brand X


Cost of Bit =                        $3,000.00                             Cost of Bit =            $2,800.00

Total Feet or Meters =                 1800.00                             Total Feet or Meters =     1800.00

Cost of Rig / Hour =                   $200.00                             Cost of Rig / Hour =       $200.00

Bit Penetration =                           19.00                          Bit Penetration =             18.00

 TDC =                                 $12.19                               TDC =                     $12.67
Brand Y                                                        Brand Z


Cost of Bit =                        $2,600.00                             Cost of Bit =            $2,400.00

Total Feet or Meters =                 1800.00                             Total Feet or Meters =     1800.00

Cost of Rig / Hour =                   $200.00                             Cost of Rig / Hour =       $200.00

Bit Penetration =                           18.00                          Bit Penetration =            18.00

 TDC =                                 $12.56                               TDC =                     $12.44




Total drilling cost (TDC) can be calculated in several ways, but it is not always the cheapest bit
which offers the lowest cost. A small increase in penetration rate can significantly affect the results.


                                     EVEN WITH A HIGHER BIT COST

								
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