Update for Drilling Cost for iPad, release 2.0, now available on iTunes App Store

Drilling Cost for iPad 2.0

The Drilling Cost provides to the drillers, toolpushers, drilling engineers, students and other professionals in the petroleum industry a productivity tool helpful in drilling operation to calculate the drilling cost per length unit drilled, analize of drill bit performance and to use in planning phase of oil wells.

On iTunes App Store: http://itunes.apple.com/app/drilling-costs-for-ipad/id418482575?mt=8#

Formula:

Drilling Cost = (Bit Cost + Rig Cost x (Drilling Time + Trip Time)) ÷ (Lengt Drilled)

Drilling Cost => drilling cost $ per length unit ($/ft, $/m)
Bit Cost => bit cost, $
Rig Cost => rig cost per hour, $ / hour
Drilling Time => total drilling time, hour
Trip Time => trimp time, hour
Length Drilled => total length drilled by drill bit, ft or m

The Advanced Feature:

This application provides an advanced feature that is the modeling of data Drilling Cost vs. Drilling Time using quadratic regression. The minimum point of the parable may correspond to the operation time of the drill bit, where will occur the minimum cost. The more the R squared is close to 1, the result will be better.

Quadratic regressions:

1) Drilling Cost = c + b (LD) + a (LD)*(LD), LD = total Length Drilled by the dril bit
2) Drilling Cost = c + b (DT) + a (DT)*(DT), DT = total drilling time by the drill bit

Multiple Files:

The user can work with multiple files that must correspond to the drill bits used in each phase of drilling.

What’s New in Version 2.0

1) Was Included toolbar in all views;
2) Ability to send data and Screenshots by email;
3) Ability to print Screenshots;
4) Improvements to edit data items: ADD, EDIT, INSERT and REMOVE.
5) Improvements in the graphics: Options With or Without Quadratic Regression, Line or Points Only, Select the types to points;
6) Improvement of performance after revision the code;
7) Improvements to save data files.

8) Tested in iOS 4.2.1, 4.3 and 4.3.1;