How Does 1029.4 Come From?

1029.4 is used in several calculations in the oilfield and we’ve been asked about what is 1029.4, how it comes from, why it needs to be this figure so in this article, we will show you how 1029.4 comes from.

how-does-1029.4-come-from

First of all, we would like to give someone about the background of this figure. The 1029.4 is widely used for capacity calculations. The following equations utilizing 1029.4 are listed below;

Annular capacity, bbl/ft = (OD2 – ID2) ÷ 1029.4

Internal capacity, bbl/ft = ID2 ÷ 1029.4

Where;

ID, OD are in inch.

Annular capacity and internal capacity are in bbl/ft.

As you can see, 1029.4 is the unit conversion used to convert square inch into bbl/ft.

Let’s see how we can find this figure mathematically.

Area of circle (square inch) = (π÷4) x D2

D is diameter in inch.

For oilfield unit, the diameter (D) is inch.

In term of mathematic, Area (square inch) is equal to Volume per Height, cubic inch (in3) per inch (in).

Cubic inch per inch is not typically used in oilfield and oilfield unit usually uses bbl for volume and ft for length. Therefore, we need to convert from in3/in to bbl/ft.

The following figures are unit conversions used for the calculation.

1 bbl = 9702 cubic inch (in3)

1 inch = 0.08333 ft

Based on the unit conversions and Area of circle formula, we can put everything together like this.

1029.4 comes from-1

This is the final formula.

1029.4 comes from-2

You can see that 1029.4 is the final conversion unit for this formula.

Ref Book -> Applied Drilling Engineering Book special offer 

 

Related Post

Drilling Formula Excel Sheet Version 1.2 Free Down... This is the second up date of drilling formula spread sheet, Drilling Formula Excel Sheet Version 1.2. Drillingformulas.com distributed the first v...
Coring Cost Per Footage Drilled Coring is a special process to recover wellbore rock in the well. Figure 1 - Core from the well. Credit – Wikipedia This article will demonstrate ...
Heavy Lifting ‘Mariner A’ Platform Topside Install... Norwegian energy company Statoil has completed the installation of the 38,000-tonne topside of its Mariner A production, drilling and quarters (PDQ) p...
Decrease oil/water ratio Decrease oil/water ratio: The concept of decrease oil water ratio is to increase water volume in the system without any changes in oil volume to meet ...
Share the joy
  • 2.5K
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
    2.5K
    Shares
Tagged , , , . Bookmark the permalink.

About DrillingFormulas.Com

Working in the oil field and loving to share knowledge.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.