The fields with the red border are required.
    Air Velocity Calculator Change the numbers in the blue boxes to your application (inches only)
    Hole Diameter Drill Pipe O.D. C.F.M. Uphole Velocity (FPM)  
    America West Drilling Supply (800) 800-8444
    3000 FPM is the preferred minimum

                If 3000 FPM cannot be acheived, try using foam.