Page 109 - Well Control for Completions and Interventions

Completion Equipment 101

Figure 3.11 Pipe markings are used to indicate grade and yield.

can easily be calculated by working out the cross-sectional area of the
2
tubing wall (in in ) and multiplying this value by the tubing yield (in psi).
1
For example, to calculate the yield of 4/2v 12.6 lb/ft tubing:
The ID must be obtained from tables. The ID that corresponds to
1
4/2v 12.6 lb/ft tubing is 3.958v.
2
2
The cross-section of the tubing is therefore π/4 3 (OD ID ),
2 2 2
becomes π=4 3 (4.5 3.958 ) 5 3.6 in .
2
The axial strength is 80,000 psi 3 3.6 in 5 288,000 lbs.
3.2.4 Tubing length range
The API specification 5CT defines tubing and casing range, and refers to
the length of casing and tubing joints. Tubing joints will fall within one
of three ranges.
API tubing ranges:
• Range 1:20 24 ft,
• Range 2:28 32 ft,
• Range 3:32 48 ft.
Casing ranges are different:
• Range 1:16 25 ft,
• Range 2:25 34 ft,
• Range 3:34 48 ft.