Hi.. To all the petroleum engineering and well geologists, I have made an open source drilling calculator. I would like to share it with all.... It actually calculates all the numericals related to the subject of Drilling, which otherwise on paper would take up a significant amount of time. I have made it for the aide of the students. Please people go through it and post your opinion... Application download: http://www.softpedia.com/get/Science-CAD/Drilling-Calculator.shtml Source Forge Project Page: http://sourceforge.net/projects/drillingcalc/ The coding is done on C# compiler - Visual Studio 2010 -It requires .NET 4.0 The project is right now still in development stage.. As new lessons would be taught in my class, more features would be added.. Thank You..