Annular Velocity Calculation Spreadsheet ^Popular

As a function drilling fluid (mud) to carried cutting from bottom hole drilling well to the surface for cleaning the hole. They have one parameter vital to keep drilling running well, and the parameter is annular velocity. When we do drilling we need pumping power to support mud function to carried cutting. Flow rate and pressure of the pump has an important role to support the smooth running of the drilling work.

If we chose the wrong rate and pumping pressure we will get more problem like re grinding, or others problem.

Component Input And Output In Annular Velocity Spreadsheet

Input data

• Bit Diameter, in
• Drill Pipe Diameter, in
• Pumping Output, gpm

Output Data

• Annular Velocity Ft/mn

And the suggestion the range of annular velocity is between 60 and 120.

Sample problem

Bid diameter/hole size = 10 inch

Drill pipe Outside diameter = 5 inch

Pumping Output = 400 gpm

Output / result of the annular velocity calculation spreadsheet is 130, 7 ft/minutes and the optimum range is 183 – 367 ft/ minutes.