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Oil Casing

Category : OCTG Products
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Oil casing is a steel pipe used to support the well wall of oil and gas wells to ensure that the drilling process is carried out and  the entire well operates properly after completion. The casing is cemented after going down the well, it is not reusable unlike oil tubing and drill pipe.

Application: Oil well casing serves as well sidewall
Pipe Standard: API SPEC 5CT/ISO 11960,GB/T 19830-2011
Size:
OD: 114.3-508mm
WT: 5.21-16.13mm
Size Tolerance OD≥114.3mm, Tolerances: +1%/-0.5%
WT:-12.5% 
Length: R1(4.88~7.62m);R2(7.62~10.36m);R3(10.36~14.63m)
Thread types: STC, LTC, BTC, special clearance, XC, VAM TOP, NEW VAM.
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Product Description

Oil casing is a steel pipe used to support the well wall of oil and gas wells to ensure that the drilling process is carried out and  the entire well operates properly after completion. The casing is cemented after going down the well, it is not reusable unlike oil tubing and drill pipe.

API Spec 5CT – Specification 5CT/ISO 11960,GB/T 19830-2011 Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells


Product

oill casing

Application

Oil well casing serves as well sidewall

Pipe Standard

API SPEC 5CT/ISO 11960,GB/T 19830-2011

Size

OD: 114.3-508mm

WT: 5.21-16.13mm

Size Tolerance

OD≥114.3mm, Tolerances: +1%/-0.5%

WT:-12.5%

Length

R1(4.88~7.62m);R2(7.62~10.36m);R3(10.36~14.63m)

Thread types

STC, LTC, BTC, special clearance, XC, VAM TOP, NEW VAM.


API 5CT Well Casing Dimension:

Lable

Type of End-finish

Inch

Weight Desination

OD(mm)

WT(mm)

J55/K55

N80

L80

C90/T95

P110

Q125

4 1/2

9.5

114.3

5.21

PS

-

-

-

-

-

10.5

114.3

5.69

PSB

-

-

-

-

-










11.6

114.3

6.36

PSLB

PLB

PLB

PLB

PLB

-

13.5

114.3

7.37

-

PLB

PLB

PLB

PLB

-

15.1

114.3

8.56

-

-

-

-

PLB

PLB

5

11.5

127

5.59

PS

-

-

-

-

-

13

6.43

PSLB

-

-

-

-

-

15

7.52

PSLBE

PLBE

PLBE

PLBE

PLBE

-

18

9.19

-

PLBE

PLBE

PLBE

PLBE

PLBE

21.4

11.1

-

PLB

PLB

PLB

PLB

PLB

23.2

12.14

-

PLB

PLB

PLB

PLB

PLB

24.1

12.7

-

PLB

PLB

PLB

PLB

PLB

5 1/2

14

139.7

6.2

PS

-

-

-

-

-

15.5

6.98

PSLBE

-

-

-

-

-

17

7.72

PSLBE

PLBE

PLBE

PLBE

PLBE

-

20

9.17

-

PLBE

PLBE

PLBE

PLBE

-

23

10.54

-

PLBE

PLBE

PLBE

PLBE

PLBE

26.8

12.7

-

-

-

P

-

-

29.7

14.27

-

-

-

P

-

-

32.6

15.88

-

-

-

P

-

-

35.3

17.45

-

-

-

P

-

-

38

19.05

-

-

-

P

-

-

40.5

20.62

-

-

-

P

-

-

43.1

64.14

-

-

-

P

-

-

6 5/8

20

168.28

7.32

PSLB






24

8.94

PSLBE

PLBE

PLBE

PLBE

PLBE

-

28

10.59

-

PLBE

PLBE

PLBE

PLBE

-

32

12.06

-

PLBE

PLBE

PLBE

PLBE

PLBE

7

20

177.8

6.91

PS






23

8.05

PSLBE

PLBE

PLBE

PLBE

-

-

26

9.19

PSLBE

PLBE

PLBE

PLBE

PLBE

-

29

10.6


PLBE

PLBE

PLBE

PLBE


32

11.51


PLBE

PLBE

PLBE

PLBE


35

12.65


PLBE

PLBE

PLBE

PLBE

PLBE

38

13.72


PLBE

PLBE

PLBE

PLBE

PLBE

7 5/8

26.4

193.67

8.33

PSLBE

PLBE

PLBE

PLBE

-

-

29.7

9.52

-

PLBE

PLBE

PLBE

PLBE

-

33.7

10.92

-

PLBE

PLBE

PLBE

PLBE

-

39

12.7

-

PLBE

PLBE

PLBE

PLBE

PLBE

42.8

14.27

-

PLB

PLB

PLB

PLB

PLB

45.3

15.11

-

PLB

PLB

PLB

PLB

PLB

47.1

15.88

-

PLB

PLB

PLB

PLB

PLB

8 5/8

24

219.08

6.71

PS

-

-

-

-

-

28

7.72

-

-

-

-

-

-

32

8.94

PSLBE

-

-

-

-

-

36

10.16

PSLBE

PLBE

PLBE

PLBE

-

-

40

11.43

-

PLBE

PLBE

PLBE

PLBE

-

44

12.7

-

PLBE

PLBE

PLBE

PLBE

-

49

14.15

-

PLBE

PLBE

PLBE

PLBE

PLBE

9 5/8

36

244.48

8.94

PSLB

-

-

-

-

-

40

10.03

PSLBE

PLBE

PLBE

PLBE

-

-

43.5

11.05

-

PLBE

PLBE

PLBE

PLBE


47

11.99

-

PLBE

PLBE

PLBE

PLBE

PLBE

53.5

13.84

-

PLBE

PLBE

PLBE

PLBE

PLBE

58.4

15.11

-

PLB

PLB

PLB

PLB

PLB

10 3/4

40.5

273.05

8.89

PSB

-

-

-

-

-

45.5

10.16

PSBE

-

-

-

-

-

51

11.43

PSBE

PSBE

PSBE

PSBE

PSBE

-

55

12.57

-

PSBE

PSBE

PSBE

PSBE

-

60.7

13.84

-

-

-

PSBE

PSBE

PSBE

65.7

15.11

-

-

-

PSB

PSB

PSB

113/4

47

298.45

9.53

PSB

-

-

-

-

-

54

11.05

PSB

-

-

-

-

-

60

12.42

PSB

PSB

PSB

PSB

PSB

PSB

13 3/8

48

339.72

8.38

-

-

-

-

-

-

54.5

9.65

PSB

-

-

-

-

-

61

10.92

PSB

-

-

-

-


68

12.19

PSB

PSB

PSB

PSB

PSB

-

72

13.06

-

PSB

PSB

PSB

PSB

PSB

16

75

406

11.13

PSB

-

-

-

-

-

84

12.57

PSB

-

-

-

-

-

109

16.66

P

P

P

-

P

P

20

94

508

11.13

PSLB

-

-

-

-

-

30

96

762

16.13

PSLB

-

-

-

-

-

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


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

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