Page 46 - Well Control for Completions and Interventions

Introduction and Well Control Fundamentals 37

1029:4
Annularcapacityinft=bbl5
2
2
CasingID 2 Tubing1OD 2 Tubing2OD 2
(1.22)
Note: Since the denominator for calculating capacity in bbl/ft (1029.4) is close
2
in value to 1000, it follows that pipe ID gives an approximate value for bbls per
1000 ft. This is useful as a rough approximation for tubing capacity if a calculator
is not available.
1
For example, 5/2v 17 lb/ft tubing has an ID of 4.892. Round up to 5v to
simplify the calculation: 5 3 5 5 25 bbls per 1000 ft of tubing.
Calculating the figure from tables, the answer is 1000 3 0.02324 5
23.24 bbls.
Mixed units: (diameter in inches capacity in L/m).
2
ID ðin:Þ
Tubing or casing capacity liters per meter; L=m 5 (1.23)
1:974

2

2

Casing ID 2 Tubing1 OD 2 Tubing2 OD 2
Annulus Capacity: L=m
1:974
(1.24)
SI units: where the ID is in mm.
ID 2
3
Tubing or casing capacity: m =m 5 (1.25)
1273000
ID 2
Tubing or casing capacity: L=m 5 (1.26)
1273
2
Casing ID 2 Tubing OD 2
3
Annular capacity in m =m 5 (1.27)
1; 273; 000
2
Casing ID 2Tubing OD 2
Annular capacity in L=m 5 (1.28)
1273
Annular capacity between casing and multiple strings of tubing, i.e.,
dual or triple string completions.

2

2
CasingID 2 Tubing1OD 2 Tubing2OD 2
3
Annularcapacityinm =m5
1273000
(1.29)