# Annular capacity between casing or hole and drill pipe tubing or casing

1029.4

Example: Hole size (Dh) = 12-1/4 in. Drill pipe OD (Dp) = 5.0 in.

1029.4

Annular capacity = 0.12149 bbl/ft b) Annular capacity, ft/bbl = 1029.4

Example: Hole size (Dh) = 12-1/4 in. Drill pipe OD (Dp) = 5.0 in.

Annular capacity, ft/bbl = 1029.4

Annular capacity = 8.23 ft/bbl c) Annular capacity, gal/ft = Dh2 — Dp2

24.51

Example: Hole size (Dh) = 12-1/4 in. Drill pipe OD (Dp) = 5.0 in.

24.51

Annular capacity = 5.1 gal/ft d) Annular capacity, ft/gal = 24.51

Example: Hole size (Dh) = 12-1/4 in. Drill pipe OD (Dp) = 5.0 in.

Annular capacity, ft/gal = 24.51

Annular capacity, ft/gal = 0.19598 ft/gal e) Annular capacity, ft3/Iinft — Dh2 — Dp2

183.35

Example: Hole size (Dh) = 12-1/4 in. Drill pipe OD (Dp) = 5.0 in.

183.35

Annular capacity = 0.682097 ft3/linft f) Annular capacity, linft/ft3 = 183.35

Example: Hole size (Dh) = 12-1/4 in. Drill pipe OD (Dp) = 5.0 in.

Annular capacity, linft/ft3 = 183.35

Annular capacity = 1.466 linft/ft3

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