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API 5CT J55 casing
API 5CT J55 casing
API 5CT J55 casing
API 5CT J55 casing

API 5CT J55 casing for oil and gas

API 5CT J55 Casing Tubing is a API 5CT Oil Casing Pipe & mainly used for oil well drilling. We manufacture API 5CT J55 Casing Tubing in accordance with the SY/T6194-96 standard, it is available as short thread type and long thread type supplied with their couplings.
Product introduction
The J55 API casing or tubing is a relatively common one in oil drilling. Because of the low steel grade of J55,
it is used for shallow oil and gas extraction. Due to its low price among other grades of steel, it enjoys broader
applications. The J55 API casing or tubing is widely used in the extraction of natural gas and coalbed methane,
and can be commonly found in shallow wells, geothermal wells, and water wells.

Specifications
1. Outer diameter
4 1/2″, 5″, 5 1/2″, 6 5/8″, 7″, 7 5/8″, 9 5/8″, 10 3/4″, 13 3/8″, 16″, 18 5/8″, 20″
2. Wall thickness
5.21 – 16.13 mm
3. Thread type
SC(Short round thread), LC(Long round thread), BC(Buttress thread)
4. Length
R1(4.88-7.62m), R2(7.62-10.36m), R3(10.36-14.63m)
 
Outer  Diameter Wall Thickness Weight Grade Threaded Length
in mm kg/m lb/ft
4 1/2" 114.3 14.14-22.47 9.50-11.50 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
5" 127 17.11-35.86 11.50-24.10 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
5 1/2" 139.7 20.83-34.23 14.00-23.00 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
6 5/8" 168.28 29.76-35.72 20.00-24.00 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
7" 177.8 25.30-56.55 17.00-38.00 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
7 5/8" 193.68 35.72-63.69 24.00-42.80 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
8 5/8" 219.08 35.72-72.92 24.00-49.00 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
9 5/8" 244.48 48.07-86.91 32.30-58.40 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
10 3/4" 273.05 48.73-97.77 32.75-65.70 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
11 3/4" 298.45 62.50-89.29 42.00-60.00 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
13 3/8" 339.72 71.43-107.15 48.00-72.00 J55/N80/P110/K55 LTC/STC/BTC R1/R2/R3
 

API 5CT J55 Casing Tubing Features

The surface of thread of coupling and API 5CT J55 Casing Tubing should be smooth without any tear, burr
or other defects that may have a negative impact on the strength and close connection.

API 5CT J55 Casing Tubing is offered with a free length range from 8m to 13m on basis of the SY/T6194-96
norm. However, it is also available no less than 6m length and its quantity should be no more than 20%.

Deformations which mentioned above are not allowed to appear on the outer surface of API 5CT J55 Casing
Tubing coupling.

Any deformation such as crease, separation, hairline, crack or scab is not acceptable on both inner and outer
surfaces of the product. All these defects should be completely removed, and the removed depth must not
exceed 12.5% of nominal wall thickness.

Technical data
Chemical Composition

Standard

Grade

Chemical Component(%)

C

Si

Mn

P

S

Cr

Ni

Cu

Mo

V

Als

API SPEC 5CT

J55K55

(37Mn5)

0.34~0.39

0.20~0.35

1.25~1.50

≤0.020

≤0.015

≤0.15

≤0.20

≤0.20

 

 

≤0.020

N80

(36 Mn2V)

0.34~0.38

0.20~0.35

1.45~1.70

≤0.020

≤0.015

≤0.15

 

 

 

0.11~0.16

≤0.020

L80(13Cr)

0.15~0.22

≤1.00

0.25~1.00

≤0.020

≤0.010

12.0~14.0

≤0.20

≤0.20

 

 

≤0.020

P110,

(30CrMo)

0.26~0.35

0.17~0.37

0.40~0.70

≤0.020

≤0.010

0.80~1.10

≤0.20

≤0.20

0.15~0.25

≤0.08

≤ 

 

Standard

Grade

 Tensile Strength(MPa)

Yield Strength(MPa)

 Elongation(%)

Hardness

API SPEC 5CT

J55

≥517

379~552

/

 

K55

≥517

≥655

 

N80

≥689

552~758

 

L80(13Cr)

≥655

552~655

≤241HB

P110

≥862

758~965

 

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