Casing pipe standard

Technical Parameters of Casing Pipe

Sizes OD
D
mm
Weight
kg/m
WT
t
mm
Type of End
        H40 J55
K55
M65 L80
C95
N80
1、Q
C90
T95
P110 Q125
1 2                      
1 2 3 4 5 6 7 8 9 10 11 12 13
4-1/2
4-1/2
4-1/2
4-1/2
4-1/2
9.50
10.50
11.60
13.50
15.10
114.30
114.30
114.30
114.30
114.30
14.14
15.63
17.26
20.09
22.47
5.21
5.69
6.35
7.37
8.56
PS
–
–
–
–
PS
PSB
PSLB
–
–
PS
PSB
PLB
PLB
–
–
–
PLB
PLB
–
–
–
PLB
PLB
–
–
–
PLB
PLB
–
–
–
PLB
PLB
PLB
–
–
–
–
PLB
5
5
5
5
5
5
5
11.50
13.00
15.00
18.00
21.40
23.20
24.10
127.00
127.00
127.00
127.00
127.00
127.00
127.00
17.11
19.35
22.32
26.79
31.85
34.53
35.86
5.59
6.43
7.52
9.19
11.10
12.14
12.70
–
–
–
–
–
–
–
PS
PSLB
PSLBE
–
–
–
–
PS
PSLB
PLB
PLB
PLB
–
–
–
–
PLBE
PLBE
PLB
PLB
PLB
–
–
PLBE
PLBE
PLB
PLB
PLB
–
–
PLBE
PLBE
PLB
PLB
PLB
–
–
PLBE
PLBE
PLB
PLB
PLB
–
–
–
PLBE
PLB
PLB
PLB

Below is a detailed technical specification table for casing pipes, covering various sizes, weights, wall thicknesses, and end types. This information helps in selecting the appropriate casing pipe based on specific application requirements.

The table provides comprehensive data including outer diameter (OD), weight per meter, wall thickness (WT), and different end types such as PS (Plain), PSLB (Short Long Thread), PLB (Long Thread), and more. Each size corresponds to specific mechanical properties and chemical compositions, ensuring compatibility with different operational environments.

These parameters are crucial for engineers and project managers to ensure the correct selection of casing pipes that meet the required performance standards, safety regulations, and cost-efficiency in oil and gas drilling operations.

For any special connection types not listed here, please consult our technical team to provide customized solutions tailored to your needs.

Chemical Composition of Casing Pipe

The chemical composition of casing pipes plays a vital role in determining their mechanical properties, corrosion resistance, and overall durability. The following table outlines the standard chemical compositions for API SPEC 5CT grades:

Chemical Compositions of Casing Pipe

Standard

Grade

Chemical Compositions (%)

API SPEC 5CT

J55

C

Si

Mn

P

S

Cr

Ni

Cu

Mo

V

K55

0.34~0.39

0.20~0.35

1.25~1.50

≤0.020

≤0.015

≤0.15

≤0.20

≤0.20

/

/

N80

0.34~0.38

0.20~0.35

1.45~1.70

≤0.020

≤0.015

≤0.15

/

/

/

0.11~0.16

L80

0.15~0.22

≤1.00

0.25~1.00

≤0.020

≤0.010

12.0~14.0

≤0.20

≤0.20

/

/

P110

0.26~0.395

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

Mechanical Properties of Casing Pipe

Mechanical Properties of Casing Pipe

Grade

Type

Total Elongation

Yield Strength

Yield Strength

Tensile Strength

Hardness

Hardness

Under Load (%)

(Min) MPa

(Max) MPa

Min MPa

Max (HRC)

Max (HBW)

 

 

 

 

 

 

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

-

-

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

-

0.5

621

724

689

25.4

255

C95

-

0.5

655

758

724

-

-

T95

-

0.5

655

758

724

25.4

255

P110

-

0.6

758

965

862

-

-

Q125

All

0.65

862

1034

931

-

-

These mechanical properties are essential for evaluating the strength, ductility, and wear resistance of casing pipes under various operating conditions. They help ensure the structural integrity and long-term performance of the pipes in demanding environments such as deep well drilling or high-pressure applications.

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