Drilling Formula Calculation Sheet 
Update … I add all drilling formulas together into one file which allows me to update it and share with you all easily. Please find the drilling formula calculation sheet.
Drilling Formula Calculation Sheet This is version no.1 which was distributed on 28-Mar-11 .
You can read all detail of this file via this link https://www.drillingformulas.com/drilling-formula-calculation-sheet/
Please feel free to give me feedback.
