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Tubing is a relatively small-diameter pipe that is run into a well to serve as a conduit for the passage of oil and gas to the field surface facilities for processing. Tubing must be adequately strong to resist loads and deformations associated with production and workovers. Further, tubing must be sized to support the expected rates of production of oil and gas.
API 5CT Tubing |
Range 1 |
Range 2 |
Range 3 |
|
6.10~7.32 |
8.53~9.75 |
11.58~12.80 |
Casing&tubing and their colors:
Label |
OD (mm) |
WT (mm) |
Type of End-finish |
|||||||||
|
NU T&C |
EU T&C |
IJ |
H40 |
J55 |
L80 |
N80 |
C90 |
T95 |
P110 |
||
1.9 |
2.75 |
2.9 |
2.76 |
48.26 |
3.68 |
PNUI |
PNUI |
PNUI |
PNUI |
PNUI |
PNUI |
- |
1.9 |
3.65 |
3.73 |
- |
48.26 |
5.08 |
PU |
PU |
PU |
PU |
PU |
PU |
PU |
1.9 |
4.42 |
- |
- |
48.26 |
6.35 |
- |
- |
P |
- |
P |
P |
- |
2 3/8 |
4 |
- |
- |
60.32 |
4.24 |
PU |
PN |
PN |
PN |
PN |
PN |
- |
2 3/8 |
4.6 |
4.7 |
- |
60.32 |
4.83 |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
2 3/8 |
5.8 |
5.95 |
- |
60.32 |
6.45 |
- |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
2 3/8 |
6.6 |
- |
- |
60.32 |
7.49 |
- |
- |
P |
- |
P |
P |
- |
2 3/8 |
7.35 |
7.45 |
- |
60.32 |
8.53 |
- |
- |
PU |
- |
PU |
PU |
- |
2 7/8 |
6.4 |
6.5 |
- |
73.02 |
5.51 |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
2 7/8 |
7.8 |
7.9 |
- |
73.02 |
7.01 |
- |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
2 7/8 |
8.6 |
8.7 |
- |
73.02 |
7.82 |
- |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
2 7/8 |
9.35 |
9.45 |
- |
73.02 |
8.64 |
- |
- |
PU |
- |
PU |
PU |
- |
2 7/8 |
10.5 |
- |
- |
73.02 |
9.96 |
- |
- |
P |
- |
P |
P |
- |
3 1/2 |
7.7 |
- |
- |
88.9 |
5.49 |
PN |
PN |
PN |
PN |
PN |
PN |
- |
3 1/2 |
9.2 |
9.3 |
- |
88.9 |
6.45 |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
3 1/2 |
10.2 |
- |
- |
88.9 |
7.34 |
PN |
PN |
PN |
PN |
PN |
PN |
- |
3 1/2 |
12.7 |
12.95 |
- |
88.9 |
9.52 |
- |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
3 1/2 |
14.3 |
- |
- |
88.9 |
10.92 |
- |
- |
P |
- |
P |
P |
- |
3 1/2 |
15.5 |
- |
- |
88.9 |
12.09 |
- |
- |
P |
- |
P |
P |
- |
4 |
9.5 |
- |
- |
101.6 |
5.74 |
PN |
PN |
PN |
PN |
PN |
PN |
- |
4 |
10.7 |
11 |
- |
101.6 |
6.65 |
PU |
PU |
PU |
PU |
PU |
PU |
- |
4 |
13.2 |
- |
- |
101.6 |
8.38 |
- |
- |
P |
- |
P |
P |
- |
4 |
16.1 |
- |
- |
101.6 |
10.54 |
- |
- |
P |
- |
P |
P |
- |
4 1/2 |
12.6 |
12.75 |
- |
114.3 |
6.88 |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
- |
4 1/2 |
15.2 |
- |
- |
114.3 |
8.56 |
- |
- |
P |
- |
P |
P |
- |
API Spec 5CT – Specification 5CT/ISO 11960, Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells
Mechanical Properties
钢级Grade
类型Type
加载下的总伸长率Total elongation
under load %
屈服强度Yield Strength M pa
抗拉强度Tensile strength
min Mpa
硬度Hardness
规定壁厚 Specified wall thickness mm
允许硬度变化Allowable hardness variation
HRC
min
max
HRC
HBW
J55
-
0.5
379
552
517
-
-
-
-
K55
-
0.5
379
552
655
-
-
-
-
N80
1
0.5
552
758
689
-
-
-
-
Q
0.5
552
758
689
-
-
-
-
M65
-
0.5
448
586
586
22
235
-
-
L80
1
0.5
552
655
655
23
241
-
-
9Cr
0.5
552
655
655
23
241
-
-
13Cr
0.5
552
655
655
23
241
-
-
C90
1、2
0.5
621
724
689
25.4
255
≤12.70
3.0
1、2
0.5
621
724
689
25.4
255
12.71-19.04
4.0
1、2
0.5
621
724
689
25.4
255
19.05-25.39
5.0
1、2
0.5
621
724
689
25.4
255
≥25.4
6.0
C95
-
0.5
655
724
724
-
-
-
-
T95
1、2
0.5
655
724
724
25.4
255
≤12.70
3.0
1、2
0.5
655
724
724
25.4
255
12.71-19.04
4.0
1、2
0.5
655
724
724
25.4
255
19.05-25.39
5.0
1、2
0.5
655
724
724
25.4
255
≥25.4
6.0
P110
-
0.6
758
965
862
-
-
-
-
Q125
All
0.65
862
1034
931
b
-
≤12.70
3.0
All
0.65
862
1034
931
b
-
12.71-19.04
4.0
All
0.65
862
1034
931
b
-
≥19.05
5.0
Chemical Composition
Standard |
Grade |
Composition(%) |
||||||||||
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
Mo |
V |
AIs |
||
API SPEC 5CT |
J55 |
0.34~0.39 |
0.20~ |
1.25~1.50 |
≤0.020 |
≤0.015 |
≤0.15 |
≤0.20 |
≤0.20 |
|
|
≤0.020 |
K55· |
||||||||||||
N80 |
0.34~0.38 |
0.20~ |
1.45~1.70 |
≤0.020 |
≤0.015 |
≤0.15 |
/ |
/ |
/ |
0.11 |
≤0.020 |
|
L80 |
0.15~0.22 |
≤1.00 |
0.25~1.00 |
≤0.020 |
≤0.010 |
12.0~ |
≤0.20 |
≤0.20 |
/ |
/ |
≤0.020 |
|
P110 |
0.26~0.35 |
0.17~ |
0.40~0.70 |
≤0.020 |
≤0.010 |
0.80~ |
≤0.20 |
≤0.20 |
0.15 |
≤0.08 |
≤0.020 |