TOTAL FLOW AREA (TFA) FOR DRILLING BITS JET NOZZLES DEFINITION, CALCULATIONS, CALCULATOR AND MOBILE APPLICATION
Introduction To Drilling Bit Jet Nozzles Total Flow Area
What Is The Drilling Bit Jet Nozzles?
Why This Drilling bit jet Nozzles are necessary?Drilling fluids circulate through a drill string to nozzles at the bit and back to the surface via the system annulus. They provide three crucial functions to drilling:
- Cleaning of the cutting structure.
- Cuttings removal from the hole bottom.
- Efficient cuttings evacuation to the surface.
What is The Definition Of Total Flow Area (TFA) ?Total Flow Area (TFA) is a term related to drilling bits jet nozzles which can be defined as the summation of all the areas of the drilling bit jet nozzles areas which fluid can go through while circulating .
How To Calculate Drilling bits Total Flow Area (TFA) ?So it is simple all you have to do is to count all the drilling bit jet nozzles. Accordingly, you can determine flow area with a simple equation.
But we have to take in our consideration that diameter of the drilling bits jet nozzles is reported on xx/32 inch.
N is nozzle size in number/32 inch. Area in square inch
Example on Drilling bits Total Flow Area (TFA) CalculationsFor Example, a drilling bit ahs 5 jet nozzles. 3 x 10/32 in & 2 x 12/32in . To calculate the total flow area (TFA) of the drilling bit, we will use this equation for each nozzle size and then make a summation for all of them.
So solving above equation we will have 0.451 inch2