API K55 Casing

API 5CT J55 casing is a seamless steel pipe applied in supporting the wall of petroleum and gas wells in order to ensure that the well is operating normally during and after the drilling process. Each oil well will need several layers of casings depending on the different drilling depth and...

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API 5CT J55 casing is a seamless steel pipe applied in supporting the wall of petroleum and gas wells in order to ensure that the well is operating normally during and after the drilling process. Each oil well will need several layers of casings depending on the different drilling depth and geological conditions. 5CT seamless casing has an excellent elongation property. After the casing is installed in the well, the well is be cemented. So seamless steel casing is not reusable. Therefore, casing pipe consumption will occupy more than 70% of the whole oil well pipes. 


Properties: API 5CT casing tube is cooled after tempering process. This method can help the seamless casing avoid the high temperature brittleness and gain toughness, quenching method is adopted to reduce harmful elements and impurities effectively.

Applications: J55 casing pipe is widely used in the foundation works of many industries such as petroleum, natural gas, coal gas, water supply, thermal power generation,  dredging engineering etc.


Features of API 5CT J55 Casing Tube
 Strong, durable and reliable
 J55 casing tube has sturdy construction
 Economic rate of return is very high;
 J55 casing tube is light in weight


Oil casing  pipe is one of our main products. We will give you the products with competitive price in good quality:

 Size: 4 1/2”-20”
 Wall thickness: 0.224-0.514”
 Grade: J55,K55,L80,N80,C90,T95,P110,Q125
 Thread: STC,LTC,BTC
 Length: API 5CT standard,R1,R2,R3
 Package: Bundle or loose

Chemical Composition:

Standard codes

Models of steel tubes

Chemical compositions(%)

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

≤0.020


Mechanical Properties:

Standard codes

Models of steel tubes

Tensite strength(MPa)

Yield strength(MPa)

Elongation(%)

Hardness

API SPEC 5CT

J55

≥517

379~552

check the table

 

K55

≥517

≥655

 

N80

≥689

552~758

 

L80(13Cr)

≥655

552~655

≤241HB

P110

≥862

758~965

 

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