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Field service & billing software for oilfield service companies — capture tickets at the wellsite, bill in days not weeks.
Capacity between hole and pipe.
bbl/ft = (Dh² − Dp²) ÷ 1029.4Diameters in inches. The 1029.4 constant gives capacity in barrels per foot. Leave pipe OD at 0 for open-hole volume.
The annulus is the space between the drill pipe (or casing) and the wellbore wall. Knowing its volume is essential for cementing, displacements, and tracking circulation. Annular capacity in barrels per foot is (Dh² − Dp²) ÷ 1029.4, where Dh is the hole or casing inside diameter and Dp is the pipe outside diameter, both in inches.
Multiply capacity by the length of the annular section to get the total volume in barrels — the number you need to know how much cement or fluid to pump.
Field service & billing software for oilfield service companies — capture tickets at the wellsite, bill in days not weeks.