API SPEC 5CT Tubing, specifically seamless steel tubing, stands out as a premier choice in the industry. Designed for downhole use in production or injection operations, it efficiently transports crude oil and natural gas from reservoirs to the surface after drilling completion.
It comes in a wide range of steel grades, from J55 to Q125, V150, and others, each representing varying levels of strength and performance. Additionally, oil tubing offers multiple thread types and size specifications to meet diverse operational requirements.
Specification
Standard: API
Standard2:API 5CT
Grade GroupAPI J55-API P110
Grade:API J55, API K55, API N80, API L80, API P110
Thickness:4 - 16 mm, As per API 5CT
Section Shape:Round
Outer Diameter(Round):114 - 508 mm
Place of Origin:Hebei, China
Application:Oil Pipe, Used in oil well drilling
Technique:Hot Rolled
Certification:API
OCTG Tubing Pipe
| Type |
Size(O.D. ) |
Nominal Weight |
W.T. |
I.D. |
Coupling |
|||
|
in |
Mm |
Lbf/ft |
Kg/m |
mm |
mm |
O.D.mm |
Min length mm |
|
|
NUE |
1.90 |
48.26 |
2.75 |
4.09 |
3.68 |
40.90 |
55.88 |
95.25 |
|
2 3/8 |
60.32 |
4.60 |
6.85 |
4.83 |
50.66 |
73.02 |
107.95 |
|
|
2 7/8 |
73.02 |
6.40 |
9.52 |
5.51 |
62.00 |
88.90 |
130.18 |
|
|
3 ½ |
88.90 |
9.20 |
13.69 |
6.45 |
76.00 |
107.95 |
142.88 |
|
|
4 1/2 |
114.30 |
12.60 |
18.75 |
6.88 |
100.54 |
132.08 |
155.58 |
|
|
EUE |
1.90 |
48.26 |
2.90 |
4.32 |
3.68 |
40.90 |
63.50 |
98.42 |
|
2 3/8 |
60.32 |
4.70 |
6.99 |
4.83 |
50.66 |
77.80 |
123.82 |
|
|
2 7/8 |
73.02 |
6.50 |
9.67 |
5.51 |
62.00 |
93.17 |
133.35 |
|
|
3 ½ |
88.90 |
9.30 |
13.84 |
6.45 |
76.00 |
114.30 |
146.05 |
|
|
4 1/2 |
114.30 |
12.75 |
18.97 |
6.88 |
100.54 |
141.30 |
158.75 |
|
API 5CT tubing with below grades:
API 5CT J55
API 5CT K55
API 5CT N80-1
API 5CT N80Q
API 5CT C90
API 5CT C95
API 5CT P110
API 5CT Q125
Ends Type of API 5CT tubing
NU Tubing pipe
EUE Tubing pipe
Premium Ends in API 5CT Tubing
Chemical Composition of API 5CT Tubing Pipe
| Chemical composition,mass fraction(%) | |||||||||||||||
| Group | Grade | Type | C | Mn | Mo | Cr | Ni | Cu | P | S | Si | ||||
| Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Max. | Max. | Max. | Max. | Max. | |||
| 1 | H40 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – |
| J55 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – | |
| K55 | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – | ||||
| N80 | 1 | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – | |
| N80 | Q | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – | |
| R95 | – | – | 0.45 | – | 1.90 | – | – | – | – | – | – | 0.03 | 0.030 | 0.45 | |
| 2 | M65 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – |
| L80 | 1 | – | 0.43 | – | 1.90 | – | – | – | – | 0.25 | 0.35 | 0.03 | 0.030 | 0.45 | |
| L80 | 9Cr | – | 0.15 | 0.30 | 0.60 | 0.90 | 1.10 | 8.00 | 10.00 | 0.50 | 0.25 | 0.02 | 0.010 | 1.00 | |
| L80 | 13Cr | 0.15 | 0.22 | 0.25 | 1.00 | – | – | 12.00 | 14.00 | 0.50 | 0.25 | 0.02 | 0.010 | 1.00 | |
| C90 | 1 | – | 0.35 | – | 1.20 | 0.25 | 0.85 | – | 1.50 | 0.99 | – | 0.02 | 0.010 | – | |
| T95 | 1 | – | 0.35 | – | 1.20 | 0.25 | 0.85 | 0.40 | 1.50 | 0.99 | – | 0.02 | 0.010 | – | |
| C110 | – | – | 0.35 | – | 1.20 | 0.25 | 1.00 | 0.40 | 1.50 | 0.99 | – | 0.02 | 0.005 | – | |
| 3 | P110 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – |
| 4 | Q125 | 1 | – | 0.35 | – | 1.35 | – | 0.85 | – | 1.50 | 0.99 | – | 0.02 | 0.010 | – |
Please note:
a. The carbon content for L80 may be increased up to 0,50 % maximum if the product is oil-quenched.
b. The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the WT is less than 17,78 mm.
c. The carbon content for R95 may be increased up to 0,55 % maximum if the product is oil-quenched.
d. The molybdenum content for T95 Type 1 may be decreased to 0,15 % minimum if the WT is less than 17,78 mm.
e. For EW Grade P110, the phosphorus content shall be 0,020 % maximum and the sulfur content 0,010 % maximum.
NL = no limit. Elements shown shall be reported in product analysis.
Mechanical Properties of API 5CT steel casing and tubing pipes:
| Mechanical Properties | ||||||||
| Group | Steel Grade | Type | Total | Yield Strength (Mpa) | Tensile Strength (Mpa) | Hardness max. | ||
| % | min. | max. | MPa | HRC | HWB | |||
| 1 | H40 | – | 0.5 | 276 | 552 | 414 | – | – |
| J55 | – | 0.5 | 379 | 552 | 517 | – | – | |
| K55 | – | 0.5 | 379 | 552 | 655 | – | – | |
| N80 | 1 | 0.5 | 552 | 758 | 689 | – | – | |
| N80 | Q | 0.5 | 552 | 758 | 689 | – | – | |
| R95 | – | 0.5 | 655 | 758 | 724 | – | – | |
| 2 | M65 | – | 0.5 | 448 | 586 | 586 | 22 | 235 |
| L80 | 1 | 0.5 | 552 | 655 | 655 | 23 | 241 | |
| L80 | 9Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | |
| L80 | 13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | |
| C90 | 1 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | |
| T95 | 1 | 0.5 | 655 | 758 | 724 | 25.4 | 255 | |
| C110 | – | 0.7 | 758 | 828 | 793 | 30 | 286 | |
| 3 | P110 | – | 0.6 | 758 | 965 | 862 | – | – |
| 4 | Q125 | 1 | 0.65 | 862 | 1034 | 931 | – | |
OCTG Tubing dimensions and weight chart
