ظرفیت فضای حلقوی

به کمک این فرمول میتوانید ظرفیت فضای حلقوی لوله حفاری و لوله جداری را محاسبه کنید.

There are several different formulas for finding the annular capacity, below are some examples.

Formula 1:

Annular capacity in lin.ft/ft³ = 183.35 / (Dh² — Dp²)

Example:

Hole size (Dh) = 12.75 in.

Drill pipe OD (Dp) = 6 in.

To solve:

 1 : Annular capacity lin.ft/ft3 = 183.35 / (12.75)2 — (6)2 2 : Annular capacity lin.ft/ft3 = 1.45 lin.ft/ft3

Formula 2:

Annular capacity in ft³/lin.ft = (Dh² — Dp²) / 183.35

Example:

Hole size (Dh) = 12.75 in.

Drill pipe OD (Dp) = 6 in.

To solve:

 1 : Annular capacity ft3/lin.ft = (12.75)2 — (6)2 / 183.35
2 : Annular capacity = .6903 ft3/lin.ft

Formula 3:

Annular capacity in bbls/ft = (Dh² — Dp²) / 1029.4

Example:

Hole size (Dh) = 12.75 in.

Drill pipe OD (Dp) = 6 in.

To solve:

 1 : Annular capacity in bbls/ft = (12.75)2 — (6)2 / 1029.4
2 : Annular capacity = .1229 bbls/ft

Formula 4:

Annular capacity in ft/bbls = 1029.4 / (Dh² — Dp²)

Example:

Hole size (Dh) = 12.75 in.

Drill pipe OD (Dp) = 6 in.

To solve:

 1 : Annular capacity in ft/bbls = 1029.4 / (12.75)2 — (6)2 2 : Annular capacity = 8.13 ft/bbls

Formula 5:

Annular capacity in gals/ft = (Dh² — Dp²) / 24.51

Example:

Hole size (Dh) = 12.75 in.

Drill pipe OD (Dp) = 6 in.

To solve:

 1 : Annular capacity gal/ft = (12.75)2 — (6)2/ 24.51
2 : Annular capacity = 5.16 gals/ft

Formula 6:

Annular capacity in ft/gal = 24.51 / (Dh² — Dp²)

Example:

Hole size (Dh) = 12.75 in.

Drill pipe OD (Dp) = 6 in.

To solve:

 1 : Annular capacity ft/gals = 24.51 / (12.75)2 — (6)2 2 : Annular capacity ft/gals = .1937 ft/gals