API 5CT OCTG tubing Manufacturer

Short Description:

API 5CT OCTG tubing is the conduit used to transport crude oil or natural gas from the producing formations to the field surface facilities for processing after drilling is completed. During the extraction process, the OCTG tubing must withstand the pressure and it must be adequately strong to resist loads and deformations associated with production and workovers. In addition, tubing generally is sized to satisfy the expected rates of production of oil and gas. That is because if tubing is too large, we will have an economic impact beyond the cost of tubing oil and gas itself, however, if API tubing is too small, it will restrict the production of oil or gas, and if things continue this way it will impact subsequent economic performance of the well. Generally, tubing is manufactured in the same way as casing, except an additional process known as “upsetting” which is applied to thicken the pipes.

Send email to us

Product Detail

Product Tags

Specifications of OCTG tubing

1. Dimension range (OD inch): 1-1/2”----4 1/2”,

2. Dimension range (OD mm): 26.67----114.3

3. Type of upset: NUE, EUE, Plain end.

4. Standard: API SPEC 5CT

5. Main Steel Grade: H40, J55, N80, N80Q, L80, L80-1, L80-9Cr, L80-13Cr, P110 etc.

6. Type of Tubing: Non-upset tubing (NU), External-upset tubing (EUE), Integrated Joint (IJ).

7，Length

length
Project	R1	R2	R3
Tubing	6.10-7.32m	8.53-9.75m	11.58-12.80m
Casing	4.88-7.62m	7.62-10.36m	10.36-14.63m

Chemical Composition

Standard

Grade

Composition（%）

AIs

API SPEC 5CT

J55K55

0.34～0.39

0.20～
0.35

1.25～1.50

≤0.020

≤0.03

≤0.15

≤0.20

≤0.020

(37Mn5)

N80

0.34～0.38

0.20～
0.35

1.45～1.70

≤0.020

≤0.03

≤0.15

0.11
～0.16

≤0.020

(36 Mn2V)

L80(1)

≤0.43

≤0.45

≤1.9

≤0.03

≤0.25

≤0.35

L80(9Cr)

≤0.15

≤1.00

0.3～0.60

≤0.020

≤0.030

8～
10.0

≤0.50

≤0.25

0.9 ～1.1

≤0.020

L80(13Cr)

0.15～0.22

≤1.00

0.25～1.00

≤0.020

≤0.030

12.0～
14.0

≤0.50

≤0.25

≤0.020

P110

0.26～0.35

0.17～
0.37

0.40～0.70

≤0.020

≤0.030

0.80～
1.10

≤0.20

0.15
～0.25

≤0.08

≤0.020

(30CrMo)

Mechanical Properties

Standard	Grade	Tensile Strength（MPa）	Yield Strength（MPa）	Elongation（%）	Hardness
API SPEC 5CT	J55	≥517	379～552	0.5%	≤241HB
	K55	≥655	379~552	0.5%
	N80	≥689	552~758	0.5%
	L80（13Cr）	≥655	552~655	0.5%
	P110	≥862	758~965	0.6%

Casing Tubing Steel color code

Name	J55	K55	N80-1	N80-Q	L80-1	P110
Casing	a bright green band	two bright green bands	a bright red band	a bright red band + a green band	a red band + a brown band	a bright white band
Coupling	entire green coupling + a white band	entire green coupling	entire red coupling	entire red coupling + a green band	entire red coupling + a brown band	entire white coupling

Specifications Type of end-finish

Outside Diameter		Wall Thickness		Weight				Grade and Upset Type*
Outside Diameter		Wall Thickness		Non-Upset T&C		External Upset T&C		Grade and Upset Type*
(In.)	(mm)	(In.)	(mm)	(lb/ft)	(kg/m)	(lb/ft)	(kg/m)	J55	L80	N80	C90	P110
2-3/8	60.32	0.167	4.24	4.00	5.95	-	-	PN	PN	PN	PN	-
		0.190	4.83	4.60	6.85	4.70	6.99	PNU	PNU	PNU	PNU	PNU
		0.254	6.45	5.80	8.63	5.95	8.85	-	PNU	PNU	PNU	PNU
		0.336	8.53	7.35	10.94	7.45	11.09	PU	-	PU	PU	-
2-7/8	73.02	0.217	5.51	6.40	9.52	6.50	9.67	PNU	PNU	PNU	PNU	PNU
		0.276	7.01	7.80	11.61	7.90	11.76	-	PNU	PNU	PNU	PNU
		0.308	7.82	8.60	12.80	8.70	12.95	-	PNU	PNU	PNU	PNU
		0.340	8.64	9.35	13.91	9.45	14.06	-	PU	-	PU	-
		0.440	11.18	11.50	17.11	-	-	N	PN	-	PN	-
3-1/2	88.90	0.216	5.49	7.70	11.46	-	-	PN	PN	PN	PN	-
		0.254	6.45	9.20	13.69	9.30	13.84	-	PNU	PNU	PNU	PNU
		0.289	7.34	10.20	15.19	-	-	PN	PN	PN	PN	-
		0.375	9.52	12.70	18.91	12.95	19.27	-	PNU	PNU	PNU	PNU
4	101.60	0.226	5.74	9.50	14.14	-	-	PN	PN	PN	PN	-
4	101.60	0.262	6.65	-	-	11.00	16.37	PU	PU	PU	PU	-
4-1/2	114.30	0.271	6.88	12.60	18.75	12.75	18.97	PNU	PNU	PNU	PNU	-