API SPEC 5CT oil casings for oilfield

3 125

Product specifications: Outer diameter: Φ26.67mm~Φ219.08mm; Wall thickness: 3.18mm~22.2mm 
Product features Short description:
API full range of oil casing mainly refers to the implementation of the American Petroleum Institute API SPEC 5CT standard steel pipe, mainly used Mining of oil, natural gas and other resources. Tubing is used to extract oil or natural gas from oil wells. The casing is used as a well wall for oil and gas wells.

The full range of API oil casings mainly refers to the steel pipes that implement the American Petroleum Institute's API SPEC 5CT standard, which is mainly used for the exploitation of oil, natural gas and other resources. Tubing is used to extract oil or natural gas from oil wells. The casing is used as a well wall for oil and gas wells.

 outer diameter: Φ26.67mm~Φ219.08mm; wall thickness: 3.18mm~22.2mm. 

Main steel grade

Group

Steel grade

Types of

Total elongation 
under load

Yield strength 
MPa

Tensile strength 
min 
MPa

Hardness a 
max

Specified wall thickness

mm

Allowable hardness 
variation B 
HRC

min

max

HRC

HBW

1

2

3

4

5

6

7

8

9

10

11

1

H40 
J55 
K55 
N80 
N80





Q

0.5 
0.5 
0.5 
0.5 
0.5

276 
379 
379 
552 
552

552 
552 
552 
758 
758

414 
517 
655 
689 
689





-





-





-





-

2

M65 
L80 
L80 
L80 
C90 
C90 
C90 
C90 
C95 
T95 
T95 
T95 
T95

-
1
9Cr
13Cr
1、2
1、2
1、2
1、2
-
1、2
1、2
1、2
1、2

0.5 
0.5 
0.5 
0.5 
0.5 
0.5 
0.5 
0.5 
0.5 
0.5 
0.5 
0.5 
0.5

448 
552 
552 
552 
621 
621 
621 
621 
655 
655 
655 
655 
655

586 
655 
655 
655 
724 
724 
724 
724 
758 
758 
758 
758 
758

586 
655 
655 
655 
689 
689 
689 
689 
724 
724 
724 
724 
724

22 
23 
23 
23 
25.4 
25.4 
25.4 
25.4 

25.4 
25.4 
25.4 
25.4

235 
241 
241 
241 
255 
255 
255 
255 

255 
255 
255 
255


-


≤12.70 
12.71~19.04 
19.05~25.39 
≥25.40 

≤12.70 
12.71~19.04 
19.05~25.39 
≥25.40


-


3.0 
4.0 
5.0 
6.0 

3.0 
4.0 
5.0 
6.0

3

P110

-

0.6

758

965

862

-

-

-

-

4

Q125
Q125
Q125

All 
All 
All

0.65 
0.65 
0.65

862 
862 
862

1034 
1034 
1034

931 
931 
931



b



-

≤12.70 
12.71~19.04 
≥19.05

3.0 
4.0 
5.0

 

Implementation of the standard     API SPEC 5CT, ISO 11960-2004, GB/T 19830-2011. 

 

Product features 
  Good geometric dimensional accuracy and stable physical and chemical properties; 
  casing has excellent crushing strength, generally more than 15% of the standard value of API; 
  tubing is rolled by CPE pipe jacking unit imported from Mannesmann-Demarkmill, Germany The internal surface quality is leading domestically.


.

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