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OCTG

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Casing Pipe

Pipe Type:Oil casing, API 5CT casing,API Spec 5CT J55 K55 N80 L80 Seamless Steel Oil Well Casing Pipe

Outer diamater(OD):114.30mm-508mm

Wall thickness(WT):5.21mm-16.13mm

Length:R1; R2; R3

Gread:J55;K55;N80-Q;L80-1;L80-9Cr;L80-13Cr,C95,P10

Standard: API 5CT PSL1/PSL2  J55,K55,N80-1,N80-Q,
 API 5CT PSL1/PSL2  L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125

Thread types: STC;LTC;BTC;VAM TOP equivalent;New VAM equivalent;CS equivalent;HSC equivalent;NUE;EUE;LTC;XC

Thread:  NUE, EUE, VAM, STC, LTC, BTC, XC, VAM TOP, NEW VAM,HYDRILL CS

Application: Casing Pipe is widely used for fastening oil and gas well wall or borehold, with bigger diameter than tubing, including surface casings, technical casings and oil layer casings.

Introduction

Pipe Type:Oil casing, API 5CT casing,API Spec 5CT J55 K55 N80 L80 Casing Pipe;Seamless Steel Oil Well Casing Pipe

Outer diamater(OD):114.30mm-508mm

Wall thickness(WT):5.21mm-16.13mm

Length:R1; R2; R3

Gread:J55;K55;N80-Q;L80-1;L80-9Cr;L80-13Cr,C95,P10

Standard: API 5CT PSL1/PSL2  J55,K55,N80-1,N80-Q,
 API 5CT PSL1/PSL2  L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125

Thread types: STC;LTC;BTC;VAM TOP equivalent;New VAM equivalent;CS equivalent;HSC equivalent;NUE;EUE;LTC;XC

Thread:  NUE, EUE, VAM, STC, LTC, BTC, XC, VAM TOP, NEW VAM,HYDRILL CS

Application: Casing Pipe is widely used for fastening oil and gas well wall or borehold, with bigger diameter than tubing, including surface casings, technical casings and oil layer casings.

Production technology: Plain pipe-end upsetting- Austenite treatment-Quenching-Tempering-straightening-(Non-Destructive Testing)- Threading-Thread inspection-coupling MPI-phosphating-Coupling make up-Drifting-Hydrostatic testing-Measuring&Weight-Marking&Stenciling-Coating-Packing Casing and tubing-Transportation

vailable Sizes

Category: ERW, HFW or SMLS

Standards:H-40, J-55, K-55, C-75, L-80, N-80, C-95, AS-95, P-110, L80-13CR

Steel Grade: H40, J55, K55, N80

Connections

API 5CT is applicable to following connections which complied with API SPEC 5B:

• SC: Short round thread casing

• LC: Long ound thread casing

• BC: Buttress thread casing

• NU: Non-upset tubing

• EU: External upset tubing

Specification

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

 

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
5-1/2
5-1/2
5-1/2
5-1/2
5-1/2
5-1/2
5-1/2
5-1/2
5-1/2
5-1/2
5-1/2
5-1/2
14.00
15.50
17.00
20.00
23.00
26.80
29.70
32.60
35.30
38.00
40.50
43.10
139.70
139.70
139.70
139.70
139.70
139.70
139.70
139.70
139.70
139.70
139.70
139.70
20.83
23.07
25.30
29.76
34.23
39.88
44.20
48.51
52.53
56.55
60.27
64.14
6.20
6.98
7.72
9.17
10.54
12.70
14.27
15.88
17.45
19.05
20.62
22.22
PS










PS
PSLBE
PSLBE








PS
PSLB
PLB
PLB
PLB








PLBE
PLBE
PLBE








PLBE
PLBE
PLBE








PLBE
PLBE
PLBE
P
P
P
P
P
P
P


PLBE
PLBE
PLBE










PLBE






6-5/8
6-5/8
6-5/8
6-5/8
20.00
24.00
28.00
32.00
168.28
168.28
168.28
168.28
29.76
35.72
41.67
47.62
7.32
8.94
10.59
12.06
PS


PSLB
PSLBE

PSLB
PLB
PLB

PLBE
PLBE
PLBE

PLBE
PLBE
PLBE

PLBE
PLBE
PLBE

PLBE
PLBE
PLBE



PLBE
7
7
7
7
7
7
7
17.00
20.00
23.00
26.00
29.00
32.00
35.00
177.80
177.80
177.80
177.80
177.80
177.80
177.80
25.30
29.76
34.23
38.69
43.16
47.62
52.09
5.87
6.91
8.05
9.19
10.36
11.51
12.65
PS
PS





PS
PSLBE
PSLBE



PS
PLB
PLB
PLB
PLB


PLBE
PLBE
PLBE
PLBE
PLBE


PLBE
PLBE
PLBE
PLBE
PLBE


PLBE
PLBE
PLBE
PLBE
PLBE



PLBE
PLBE
PLBE
PLBE






PLBE
7
7
7
7
7
7
38.00
42.70
46.40
50.10
53.60
57.10
177.80
177.80
177.80
177.80
177.80
177.80
56.55
63.54
69.05
74.56
79.77
84.97
13.72
15.88
17.45
19.05
20.62
22.22















PLBE




PLBE




PLBE
P
P
P
P
P
PLBE




PLBE




7-5/8
7-5/8
7-5/8
7-5/8
7-5/8
7-5/8
7-5/8
7-5/8
7-5/8
7-5/8
24.00
26.40
29.70
33.70
39.00
42.80
45.30
47.10
51.20
55.30
193.68
193.68
193.68
193.68
193.68
193.68
193.68
193.68
193.68
193.68
35.72
39.29
44.20
50.15
58.04
63.69
67.41
70.09
76.19
82.30
7.62
8.33
9.52
10.92
12.70
14.27
15.11
15.88
17.45
19.05
PS









PSLBE








PSLB
PLB
PLB






PLBE
PLBE
PLBE
PLBE
PLB
PLB
PLB


PLBE
PLBE
PLBE
PLBE
PLB
PLB
PLB


PLBE
PLBE
PLBE
PLBE
PLB
PLB
PLB
P
P


PLBE
PLBE
PLBE
PLB
PLB
PLB





PLBE
PLB
PLB
PLB

7-3/4 46.10 196.85 68.60 15.11 P P P P P
8-5/8
8-5/8
8-5/8
8-5/8
8-5/8
8-5/8
8-5/8
24.00
28.00
32.00
36.00
40.00
44.00
49.00
219.08
219.08
219.08
219.08
219.08
219.08
219.08
35.72
41.67
47.62
53.57
59.53
65.48
72.92
6.71
7.72
8.94
10.16
11.43
12.70
14.15

PS
PS



PS

PSLBE
PSLBE


PS
PS
PSLB
PSLB
PLB




PLBE
PLBE
PLBE
PLBE



PLBE
PLBE
PLBE
PLBE



PLBE
PLBE
PLBE
PLBE




PLBE
PLBE
PLBE




– PLBE
9-5/8
9-5/8
9-5/8
9-5/8
9-5/8
9-5/8
9-5/8
9-5/8
9-5/8
9-5/8
9-5/8
32.30
36.00
40.00
43.50
47.00
53.50
58.40
59.40
64.90
70.30
75.60
244.48
244.48
244.48
244.48
244.48
244.48
244.48
244.48
244.48
244.48
244.48
48.07
53.57
59.53
64.73
69.94
79.62
86.91
88.40
96.58
104.62
112.50
7.92
8.94
10.03
11.05
11.99
13.84
15.11
15.47
17.07
18.64
20.24
PS
PS









PSLB
PSLBE








PSLB
PSLB
PLB
PLB


– –


PLBE
PLBE
PLBE
PLBE
PLB





PLBE
PLBE
PLBE
PLBE
PLB





PLBE
PLBE
PLBE
PLBE
PLB
P
P
P
P



PLBE
PLBE
PLBE
PLB







PLBE
PLBE
PLB



10-3/4
10-3/4
10-3/4
10-3/4
10-3/4
10-3/4
10-3/4
32.75
40.50
45.50
51.00
55.50
60.70
65.70
273.05
273.05
273.05
273.05
273.05
273.05
273.05
48.74
60.27
67.71
75.90
82.59
90.33
97.77
7.09
8.89
10.16
11.43
12.57
13.84
15.11
PS
PS





PSB
PSBE
PSBE



PSB
PSB
PSB
PSB




PSBE
PSBE




PSBE
PSBE




PSBE
PSBE
PSBE
PSB



PSBE
PSBE
PSBE
PSB





PSBE
PSB
10-3/4
10-3/4
10-3/4
73.20
79.20
85.30
273.05
273.05
273.05
108.93
117.86
126.94
17.07
18.64
20.24










P
P
P




11-3/4
11-3/4
11-3/4
11-3/4
11-3/4
11-3/4
42.00
47.00
54.00
60.00
65.00
71.00
298.45
298.45
298.45
298.45
298.45
298.45
62.50
69.94
80.36
89.29
96.73
105.66
8.46
9.53
11.05
12.42
13.56
14.78
PS





PSB
PSB
PSB


PSB
PSB
PSB




PSB
P
P



PSB
P
P



PSB
P
P



PSB
P
P



PSB
P
P
13-3/8
13-3/8
13-3/8
13-3/8
13-3/8
48.00
54.50
61.00
68.00
72.00
339.72
339.72
339.72
339.72
339.72
71.43
81.10
90.78
101.19
107.15
8.38
9.65
10.92
12.19
13.06
PS




PSB
PSB
PSB

PSB
PSB
PSB



PSB
PSB



PSB
PSB



PSB
PSB



PSB
PSB




PSB
16
16
16
16
65.00
75.00
84.00
109.00
406.40
406.40
406.40
406.40
96.73
111.61
125.01
162.21
9.53
11.13
12.57
16.66
PS



PSB
PSB
P

PSB
PSB



P



P






P



P
18-5/8 87.50 473.08 130.21 11.05 PS PSB PSB
20
20
20
94.00
106.50
133.00
508.00
508.00
508.00
139.89
158.49
197.93
11.13
12.70
16.13
PSL

PSLB
PSLB
PSLB
PSLB
PSLB










Remarks: P——Plain end;S—Short round thread;L—Long round thread;B—Buttress thread;E—Extreme-line.

Note: other premium connection shall be provided as per customer requirements.

Chemical compositions of casing pipe

 

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

-

-

 

 
 

Production process

Casing Pipe Manufacturing Process:

Steel ingot heating → hydraulic punching → reheating → extension → periodic rolling → reheating → sizing → cooling → straightening → pipe cutting → inspection

1. An annular heating furnace is required for ingot heating;
2. Punching and reheating with hydraulic press;
3. The oil casing plant uses a two-roller guide plate extension machine for extension;
4. Re-use a disc heating furnace for periodic rolling, and use a non-entry furnace for reheating, cooling, straightening, pipe cutting, and inspection.

 

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If you have any inquiries and questions, please contact CONTINENTAL STEEL CO.,LTD. at any time. Thanks in advance. Welcome!

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CONTINENTAL STEEL CO.,LTD

Continental Steel Co.,Ltd(CSC) is a pioneering manufacturer, stockist, and supplier of steel pipe products.

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