Introduction to petroleum Casing（2）

Petroleum casing chemical composition:

standard

brand

Chemical composition (%)

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 or less

0.015 or less

0.15 or less

0.20 or less

0.20 or less

/

/

0.020 or less

N80 (36 Mn2V)

0.34 ~ 0.38

0.20 ~ 0.35

1.45 ~ 1.70

0.020 or less

0.015 or less

0.15 or less

/

/

/

0.11 ~ 0.16

0.020 or less

L80(13Cr)

0.15 ~ 0.22

1.00 or less

0.25 ~ 1.00

0.020 or less

0.010 or less

12.0 ~ 14.0

0.20 or less

0.20 or less

/

/

0.020 or less

P110 (30CrMo)

0.26 ~ 0.35

0.17 ~ 0.37

0.40 ~ 0.70

0.020 or less

0.010 or less

0.80 ~ 1.10

0.20 or less

0.20 or less

0.15 ~ 0.25

0.08 or less

0.020 or less

Outside diameter, thickness, weight deviation

project

Allowable deviation

Outer diameter

The tube body

D + / – 0.79 mm, 101.60 mm or less

D 114.30 mm + 1.0% or higher

- 0.5%

collar

+1%D/-1%D

Wall thickness

- 12.5%

The weight of the

single

+ 6.5%

+ 3.5%

Vehicle loads

1.75

Length range：

The length of the

project

The scope of 1

Scope 2

The scope of 3

The tubing

6.10 7.32 m

8.53 9.75 m

-

casing

4.88 7.62 m

7.62 10.36 m

10.36 14.63 m

Oil casing specifications and standards:Description: Oil casing

Standards: API SPEC 5CT, API SPEC 5B, ISO 11960
    Casing specifications:

size
Code name

The weight of the
Code name

Outer diameter

Wall thickness

End machined form

Grade of steel

in

mm

in

mm

J55
K55

L80-1

N80

C90

C95

T95

P110

M65

4 1/2″

9.50

4.500

114.30

0.205

5.21

PS

-

-

-

-

-

-

-

10.50

4.500

114.30

0.224

5.69

PSB

-

-

-

-

-

-

-

11.60

4.500

114.30

0.250

6.35

PSLB

PLB

PLB

PLB

PLB

PLB

PLB

PLB

13.50

4.500

114.30

0.290

7.37

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

15.10

4.500

114.30

0.337

8.56

-

-

-

-

-

-

PLB

-

5. “”

11.50

5.000

127.00

0.220

5.59

PS

-

-

-

-

-

-

-

13.00

5.000

127.00

0.253

7.52

PSLB

-

-

-

-

-

-

-

15.00

5.000

127.00

0.296

9.19

PSLB

PLB

PLB

PLB

PLB

PLB

PLB

PLB

18.00

5.000

127.00

0.362

9.19

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

21.40

5.000

127.00

0.437

11.10

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

23.20

5.000

127.00

0.478

12.14

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

24.10

5.000

127.00

0.500

12.70

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

5 1/2″

14.00

5.500

139.70

0.244

6.20

PS

-

-

-

-

-

-

-

15.50

5.500

139.70

0.275

6.98

PSLB

-

-

-

-

-

-

-

17.00

5.500

139.70

0.304

7.72

PSLB

PLB

PLB

PLB

PLB

PLB

PLB

PLB

20.00

5.500

139.70

0.361

9.17

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

23.00

5.500

139.70

0.415

10.54

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

26.80

5.500

139.70

0.500

12.70

-

-

-

P

-

P

P

P

29.70

5.500

139.70

0.562

14.27

-

-

-

P

-

P

P

P

32.60

5.500

139.70

0.625

15.88

-

-

-

P

-

P

P

P

35.30

5.500

139.70

0.687

17.45

-

-

-

P

-

P

P

P

38.00

5.500

139.70

0.750

19.05

-

-

-

P

-

P

P

P

40.50

5.500

139.70

0.812

20.62

-

-

-

P

-

P

P

P

43.10

5.500

139.70

0.875

22.22

-

-

-

P

-

P

P

P

6 5/8″

20.00

6.625

168.28

0.288

7.32

PSLB

-

-

-

-

-

-

-

24.00

6.625

168.28

0.352

8.94

PSLB

PLB

PLB

PLB

PLB

PLB

PLB

PLB

28.00

6.625

168.28

0.417

10.59

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

32.00

6.625

168.28

0.475

12.06

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

7″

20.00

7.000

177.80

0.272

6.91

PS

-

-

-

-

-

-

PS

23.00

7.000

177.80

0.317

8.05

PSLB

PLB

PLB

PLB

PLB

-

-

PLB

26.00

7.000

177.80

0.362

9.19

PSLB

PLB

PLB

PLB

PLB

PLB

PLB

PLB

29.00

7.000

177.80

0.408

10.36

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

32.00

7.000

177.80

0.453

11.51

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

35.00

7.000

177.80

0.498

12.65

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

38.00

7.000

177.80

0.540

13.72

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

7 5/8″

26.40

7.625

193.68

0.328

8.33

PSLB

PLB

PLB

PLB

PLB

PLB

PLB

-

29.70

7.625

193.68

0.375

9.52

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

33.70

7.625

193.68

0.430

10.92

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

39.00

7.625

193.68

0.500

12.70

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

42.80

7.625

193.68

0.562

14.27

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

45.30

7.625

193.68

0.595

15.11

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

47.10

7.625

193.68

0.625

15.88

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

8 5/8″

24.00

8.625

219.08

0.264

6.71

PS

-

-

-

, -

-

-

-

28.00

8.625

219.08

0.304

7.72

-

-

-

-

-

-

-

-

32.00

8.625

219.08

0.352

8.94

PSLB

-

-

-

-

-

-

-

36.00

8.625

219.08

0.400

10.16

PSLB

PLB

PLB

PLB

PLB

PLB

PLB

-

40.00

8.625

219.08

0.450

11.43

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

44.00

8.625

219.08

0.500

12.70

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

49.00

8.625

219.08

0.557

14.15

-

PLB

PLB

PLB

PLB

PLB

PLB

PLB

9 5/8″

32.30

9.625

244.48

0.312

7.92

-

-

-

-

-

-

-

-

36.00

9.625

244.48

0.352

8.94

PSLB

-

-

-

-

-

-

PSLB

40.00

9.625

244.48

0.395

10.03

PSLB

PLB

PLB

PLB

PLB

PLB

-

PSLB

43.50

9.625

244.48

0.435

11.05

-

PLB

PLB

PLB

PLB

PLB

PLB

-

47.00

9.625

244.48

0.472

11.99

-

PLB

PLB

PLB

PLB

PLB

PLB

-

53.50

9.625

244.48

0.545

13.84

-

PLB

PLB

PLB

PLB

PLB

PLB

-

58.40

9.625

244.48

0.595

15.11

-

PLB

PLB

PLB

PLB

PLB

PLB

-

59.40

9.625

244.48

0.609

15.47

-

-

-

P

-

P

-

-

64.90

9.625

244.48

0.672

17.07

-

-

-

P

-

P

-

-

70.30

9.625

244.48

0.734

18.64

-

 

-

P

-

P

-

-

75.60

9.625

244.48

0.797

20.24

-

-

-

P

-

P

-

-

10 3/4″

32.75

10.750

273.05

0.279

7.09

-

-

-

-

-

-

-

-

40.50

10.750

273.05

0.350

8.89

PSB

-

-

-

-

-

-

PSB

45.50

10.750

273.05

0.400

10.16

PSB

-

-

-

-

-

-

PSB

51.00

10.750

273.05

0.450

11.43

PSB

PSB

PSB

PSB

PSB

PSB

PSB

PSB

55.50

10.750

273.05

0.495

12.57

-

PSB

PSB

PSB

PSB

PSB

PSB

PSB

60.70

10.750

273.05

0.545

13.34

-

-

-

PSB

-

PSB

PSB

-

65.70

10.750

273.05

0.595

15.11

-

-

-

PSB

-

PSB

PSB

-

73.20

10.750

273.05

0.672

17.07

-

-

 

P

-

P

-

-

79.20

10.750

273.05

0.734

18.64

-

-

-

P

-

P

-

-

85.30

10.750

273.05

0.797

20.24

-

-

-

P

-

P

-

-

11 3/4″

42.00

11.750

298.45

0.333

8.46

-

-

-

-

-

-

-

-

47.00

11.750

298.45

0.375

9.53

PSB

-

-

-

-

-

-

PSB

54.00

11.750

298.45

0.435

11.05

PSB

-

-

-

-

-

-

PSB

60.00

11.750

298.45

0.489

12.42

PSB

PSB

PSB

PSB

PSB

PSB

PSB

PSB

65.00

11.750

298.45

0.534

13.56

-

P

P

P

P

P

P

-

71.0

11.750

298.45

0.582

14.78

-

P

P

P

P

P

P

-

13 3/8″

48.00

13.375

339.72

0.330

8.38

-

-

-

-

-

-

-

-

54.50

13.375

339.72

0.380

9.65

PSB

-

-

-

-

-

-

PSB

61.00

13.375

339.72

0.430

10.92

PSB

-

-

-

-

-

-

PSB

68.00

13.375

339.72

0.480

12.19

PSB

PSB

PSB

PSB

PSB

PSB

PSB

PSB

72.00

13.375

339.72

0.514

13.06

-

PSB

PSB

PSB

 PSB

PSB

PSB

-

16

65.00

-

406.40

-

9.53

-

-

-

-

-

-

-

-

16

75.00

-

406.40

-

11.13

-

-

-

-

-

-

-

-

16

84.00

-

406.40

-

12.57

-

-

-

-

-

-

-

-

16

109.00

-

406.40

-

16.66

-

-

-

-

-

-

-

-

18 5/8″

87.20

-

473.08

-

11.05

-

-

-

-

-

-

-

-

20

94.00

-

508.00

-

11.13

-

-

-

-

-

-

-

-

20

106.50

-

508.00

-

12.70

-

-

-

-

-

-

-

-

20

133.00

-

508.00

-

16.13

-

-

-

-

-

-

-

-

Notes: P- flat end;S- short round thread;L- long round thread;B– trapezoidal thread

Oil casing steel grade color standard:

Steel grade color code
Grade of steel Pipes and subs collar
H40 Unmarked or black band selected by the manufacturing plant With the pipe
J55 oil pipe A bright green band Bright green throughout the collar
J55 casing A bright green band Bright green for the entire collar plus a white band
K55 Two bright green bands Bright green throughout the collar
M65 A green band and a blue band Use L80 steel Class 1 collar
N80 1 class A red The entire collar is red
N80 Q class A red band and a green band The whole collar red plus a green band
L80 1 class One red band and one brown band The whole collar red plus a brown band
L80 9 cr class One red band, one brown band and two yellow bands The whole collar red plus two yellow bands
L80 13 cr class A red band, a brown band, and a yellow band The whole collar red plus a yellow band
C90 1 class A purple band Purple throughout the collar
C90 2 class A purple band and a yellow band The whole collar purple plus a yellow band
T95 1 class A silver band Silver for the entire collar
T95 2 class One silver band and one yellow band The whole collar silver plus a yellow band
C95 A brown band Brown throughout the collar
P110 A white band The entire collar is white
Q125 1 class An orange band Orange throughout the collar
Q125 2 class One orange band and one yellow band The whole collar orange plus a yellow band
Q125 3 class One orange band and one green band The whole collar orange plus a green band
Q125 4 class One orange band and one brown band The whole collar orange plus a brown band

C, L, M, T stand for limited yield strength oil casing, with certain sulfur corrosion resistance. 

J55 casing  

N80  

P110 

Oil casing Specification weight scale

Outer diameter Theoretical weight Wall thickness The inner diameter size Collar diameter Screw type Grade of steel The length of the
139.7
(1/2) 5 -		 20.85 (0.244)
23.09 (15.50)
25.32 (17.00)
29.79 (20.00)
34.26 (23.00)		 6.20 (0.244)
6.98 (0.275)
7.72 (0.304)
9.17 (0.361)
10.54 (0.415)		 127.3 (5.012)
125.7 (4.950)
124.3 (4.892)
121.4 (4.778)
118.6 (4.670)		 124.1 (4.887)
122.6 (4.825)
121.1 (4.767)
118.2 (4.653)
115.4 (4.545)		 153.7
(6.050)		 Round thread
Partial ladder thread		 j55
n80
p110		 8m-12m
(2602-39.4)
177.8
(7)		 25.52917.00)
29.79 (20.00)
34.26 (23.00)
38.73 (26.00)
43.20 (29.00)
47.66 (32.00)
52.13 (35.00)
56.60 (38.00)		 5.87 (0.231)
6.91 (0.272)
8.05 (0.317)
9.19 (0.362)
10.36 (0.408)
11.51 (0.453)
12.65 (0.498)
13.72 (0.540)		 166.1 (6.538)
164.2 (6.456)
161.7 (6.366)
159.4 (6.276)
157.1 (6.180)
154.8 (6.090)
152.5 (6.004)
150.4 (5.430)		 162.9 (6.413)
160.8 (6.331)
158.5 (6.204)
156.2 (6.151)
153.9 (6.059)
151.6 (5.969)
149.3 (5.879)
147.2 (5.795)		 194.5
(7.656)		 Round thread
Partial ladder thread		 j55
n80
p110		 8m-12m
(2602-39.4)
219.1
5/8 (8 -)		 35.75 (24.00)
41.71 (28.00)
47.66 (32.00)
53.62 (36.00)
59.58 (40.00)		 6.71 (0.264)
7.72 (0.304)
8.94 (0.352)
10.16 (0.400)
11.43 (0.450)		 205.7 (8.093)
203.7 (8.020)
201.2 (7.927)
198.8 (7.827)
196.2 (7.724)		 202.5 (7.972)
200.5 (7.894)
198.0 (7.795)
195.6 (7.701)
193.0 (7.598)		 244.5
(9.625)		 Round thread
Partial ladder thread		 j55
n80
p110		 8m-12m
(2602-39.4)
244.5
(9-5/8)		 48.11 (32.30)
53.62 (36.00)
59.58 (40.00)
64.79 (43.50)
70.01 (47.00)
71.69 (53.50)		 7.92 (0.312)
8.94 (0.352)
10.03 (0.395)
11.05 (0.435)
11.99 (0.472)
13.84 (0.545)		 328.7 (9.001)
236.6 (8.921)
224.4 (8.835)
232.4 (8.755)
220.5 (8.681)
216.8 (8.535)		 244.7 (8.845)
222.6 (8.765)
220.4 (8.679)
218.4 (8.599)
216.5 (8.525)
212.8 (8.379)		 269.6
(10.6250		 Round thread
Partial ladder thread		 j55
n80
p110		 8m-12m
(2602-39.4)
273.0
Three-quarters (10 -)		 48.78 (32.75)
60.32 (40.50)
67.77 (45.50)
75.96 (51.00)
82.67 (55.50)		 7.09 (0.279)
8.89 (0.350)
10.26 (0.400)
11.43 (0.450)
12.57 (0.495)		 258.9 (10.192)
255.3 (10.050)
252.7 (9.950)
250.2 (9.850)
247.9 (9.760)		 254.9 (10.035)
251.3 (9.894)
248.8 (9.794)
246.2 (9.694)
243.9 (9.604)		 298.5
(11.752)		 Round thread
Partial ladder thread		 j55
n80
p110		 8m-12m
(2602-39.4)
339.7
(13-3/8)		 71.50 (48.00)
81.18 (54.50)
90.86 (61.00)
101.69 (68.00)		 8.38 (0.330)
9.65 (0.380)
10.92 (0.430)
12.19 (0.480)		 322.9 (12.715)
320.4 (12.615)
317.9 (12.515)
315.3 (12.415)		 319.0 (12.559)
316.5 (12.459)
313.9 (12.359)
311.4 (12.259)		 365.1
(14.374)		 Round thread
Partial ladder thread		 j55
n80
p110		 8m-12m
(2602-39.4)
73.0
7/8 (2 -)		 9.53 (6.40)
11.62 (7.90)
12.81 (8.60)		 5.51 (0217).
7.01 (0.276)
7.82 (0.308)		 62.00 (2.441)
59.00 (2.323)
57.40 (2.259)		 59.61 (2.347)
56.62 (2.229)
54.99 (2.165)		 88.9
(3.500)		 Round thread j55
n80		 8.5 m – 9.5 m
(27.9 31.2)
88.9
(3-1/2)		 11.47 (7.70)
15.19 (10.20)		 5.49 (0.216)
7.34 (0.289)		 77.9 (3.067)
76.0 (2.992)		 24.25 (2.943)
21.04 (2.797)		 107.95
(4.250)		 Round thread j55
n80		 8.5 m – 9.5 m
(27.9 31.2)
114.3
(1/2) 4 -		 18.77 (12.60) 6.88 (0.271) 100.5 (3.957) 97.37 (3.833) 132.08
(5.200)		 Round thread j55
n80		 8.5 m – 9.5 m
(27.9-31

 oil pipe  oil pipe  CEF185D41D7767761318F0098AE3FDAE