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API 5CT Casing
API 5CT Casing,Ball Valve,Butterfly Valves,Gate valve
Seamless Structural Pipe,Low Temperature Pipe,High Temperature Alloy Steel Tube
Spiral wound gasket,Pre-packed Well Screen,Seamless Line Pipe,Wire Wrap Screen Pipe,Weldolet Sockolet Threadolet

API 5CT Casing

Product

Well casing, API 5CT Casing, API 5CT Casing Pipe

Application

Oil well casing serves as well sidewall

Pipe Standard

API SPEC 5CT

Size

OD: 114.3-508mm


WT: 5.21-16.13mm

Thread types

STC, LTC, BTC, special clearance,  premium connection

Packing: Protection Caps in Both Ends, Waterproof Paper Wrapped, Two Tags
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  • Description
  • Specification
  • Standard
  • Process
  • Packing

What is API 5CT casing ?

API SPEC 5CT well casing is utilized in fixing the well wall or down hole, which has wider diameters. API SPEC 5CT can be divided into conductor casing, technical casing and oil casing.

 

API 5CT is standard technical specifications for steel casing pipes used for oil wells in petroleum and natural gas industries.


Common Grades

• J55/K55

• N80/N80Q/L80

• C90

• R95/T95

• P110/C110

• Q125

 

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

• IJ: Integral tubing connections


More casing pipes and their colors


Lengths:

 Oil Casing

Range 1

Range 2

Range 3

4.88~7.62

7.62~10.36

10.36~14.63

Dimension:

Labels

Outside diameter  D

Nominal linear mass T&C

Wall thickness t

J55

N80

L80

C90

P110

Q125

mm

kg/m

mm

K55

1/Q?

T95

1

2

3

4

5

6

7

8

9

10

11

4 1/2

9.5

114.3

14.14

5.21

PS

-

-

-

-

-

4 1/2

10.5

114.3

15.63

5.69

PSB

-

-

-

-

-

4 1/2

11.6

114.3

17.26

6.35

PSLB

PLB

PLB

PLB

PLB

-

4 1/2

13.5

114.3

20.09

7.37

-

PLB

PLB

PLB

PLB

-

4 1/2

15.1

114.3

22.47

8.56

-

-

-

-

PLB

PLB

5

11.5

127

17.11

5.59

PS

-

-

-

-

-

5

13

127

19.35

6.43

PSLB

-

-

-

-

-

5

15

127

22.32

7.52

PSLBE

PLBE

PLBE

PLBE

PLBE

-

5

18

127

26.79

9.19

-

PLBE

PLBE

PLBE

PLBE

PLBE

5

21.4

127

31.85

11.1

-

PLB

PLB

PLB

PLB

PLB

5

23.2

127

34.53

12.14

-

PLB

PLB

PLB

PLB

PLB

5

24.1

127

35.86

12.7

-

PLB

PLB

PLB

PLB

PLB

5 1/2

14

139.7

20.83

6.2

PS

-

-

-

-

-

5 1/2

15.5

139.7

23.07

6.98

PSLBE

-

-

-

-

-

5 1/2

17

139.7

25.3

7.72

PSLBE

PLBE

PLBE

PLBE

PLBE

-

5 1/2

20

139.7

29.76

9.17

-

PLBE

PLBE

PLBE

PLBE

-

5 1/2

23

139.7

34.23

10.54

-

PLBE

PLBE

PLBE

PLBE

PLBE

5 1/2

26.8

139.7

39.88

12.7

-

-

-

P

-

-

5 1/2

29.7

139.7

44.2

14.27

-

-

-

P

-

-

5 1/2

32.6

139.7

48.51

15.88

-

-

-

P

-

-

5 1/2

35.3

139.7

52.53

17.45

-

-

-

P

-

-

5 1/2

38

139.7

56.55

19.05

-

-

-

P

-

-

5 1/2

40.5

139.7

60.27

20.62

-

-

-

P

-

-

5 1/2

43.1

139.7

64.14

22.22

-

-

-

P

-

-

6 5/8

20

168.28

29.76

7.32

PSLB

-

-

-

-

-

6 5/8

24

168.28

35.72

8.94

PSLBE

PLBE

PLBE

PLBE

PLBE

-

6 5/8

28

168.28

41.67

10.59

-

PLBE

PLBE

PLBE

PLBE

-

6 5/8

32

168.28

47.62

12.06

-

PLBE

PLBE

PLBE

PLBE

PLBE

7

17

177.8

25.3

5.87

-

-

-

-

-

-

7

20

177.8

29.76

6.91

PS

-

-

-

-

-

7

23

177.8

34.23

8.05

PSLBE

PLBE

PLBE

PLBE

-

-

7

26

177.8

38.69

9.19

PSLBE

PLBE

PLBE

PLBE

PLBE

-

7

29

177.8

43.16

10.36

-

PLBE

PLBE

PLBE

PLBE

-

7

32

177.8

47.62

11.51

-

PLBE

PLBE

PLBE

PLBE

-

7

35

177.8

52.09

12.65

-

PLBE

PLBE

PLBE

PLBE

PLBE

7

38

177.8

56.55

13.72

-

PLBE

PLBE

PLBE

PLBE

PLBE

7

42.7

177.8

63.54

15.88

-

-

-

P

-

-

7

46.4

177.8

69.05

17.45

-

-

-

P

-

-

7

50

177.8

74.56

19.05

-

-

-

P

-

-

7

53.6

177.8

79.77

20.62

-

-

-

P

-

-

7

57.1

177.8

84.97

22.22

-

-

-

P

-

-

7 5/8

24

193.68

35.72

7.62

-

-

-

-

-

-

7 5/8

26.4

193.68

39.29

8.33

PSLBE

PLBE

PLBE

PLBE

-

-

7 5/8

29.7

193.68

44.2

9.52

-

PLBE

PLBE

PLBE

PLBE

-

7 5/8

33.7

193.68

50.15

10.92

-

PLBE

PLBE

PLBE

PLBE

-

7 5/8

39

193.68

58.04

12.7

-

PLBE

PLBE

PLBE

PLBE

PLBE

7 5/8

42.8

193.68

63.69

14.27

-

PLB

PLB

PLB

PLB

PLB

7 5/8

45.3

193.68

67.41

15.11

-

PLB

PLB

PLB

PLB

PLB

7 5/8

47.1

193.68

70.09

15.88

-

PLB

PLB

PLB

PLB

PLB

7 5/8

51

193.68

76.19

17.45

-

-

-

P

-

-

7 5/8

55.3

193.68

82.3

19.05

-

-

-

P

-

-

8 5/8

24

219.08

35.72

6.71

PS

-

-

-

-

-

8 5/8

28

219.08

41.67

7.72

-

-

-

-

-

-

8 5/8

32

219.08

47.62

8.94

PSLBE

-

-

-

-

-

8 5/8

36

219.08

53.57

10.16

PSLBE

PLBE

PLBE

PLBE

-

-

8 5/8

40

219.08

59.53

11.43

-

PLBE

PLBE

PLBE

PLBE

-

8 5/8

44

219.08

65.48

12.7

-

PLBE

PLBE

PLBE

PLBE

8 5/8

49

219.08

72.92

14.15

-

PLBE

PLBE

PLBE

PLBE

PLBE

9 5/8

32

244.48

48.07

7.92

-

-

-

-

-

-

9 5/8

36

244.48

53.57

8.94

PSLB

-

-

-

-

-

9 5/8

40

244.48

59.53

10.03

PSLBE

PLBE

PLBE

PLBE

-

-

9 5/8

43.5

244.48

64.73

11.05

-

PLBE

PLBE

PLBE

PLBE

-

9 5/8

47

244.48

69.94

11.99

-

PLBE

PLBE

PLBE

PLBE

PLBE

9 5/8

53.5

244.48

79.62

13.84

-

PLBE

PLBE

PLBE

PLBE

PLBE

9 5/8

58.4

244.48

86.91

15.11

-

PLB

PLB

PLB

PLB

PLB

9 5/8

59

244.48

88.4

15.47

-

-

-

P

-

-

9 5/8

64.9

244.48

96.58

17.07

-

-

-

P

-

-

9 5/8

70.3

244.48

104.62

18.64

-

-

-

P

-

-

9 5/8

75.6

244.48

112.5

20.24

-

-

-

P

-

-

10 3/4

32.75

273.05

48.74

7.09

-

-

-

-

-

-

10 3/4

40.5

273.05

60.27

8.89

PSB

-

-

-

-

-

10 3/4

45.5

273.05

67.71

10.16

PSBE

-

-

-

-

-

10 3/4

51

273.05

75.9

11.43

PSBE

PSBE

PSBE

PSBE

PSBE

-

10 3/4

55

273.05

82.59

12.57

-

PSBE

PSBE

PSBE

PSBE

-

10 3/4

60.7

273.05

90.33

13.84

-

-

-

PSBE

PSBE

PSBE

10 3/4

65.7

273.05

97.77

15.11

-

-

-

PSB

PSB

PSB

10 3/4

73.2

273.05

108.93

17.07

-

-

-

P

-

-

10 3/4

79.2

273.05

117.86

18.64

-

-

-

 P

-

-

10 3/4

85.3

273.05

126.94

20.24

 P

11 3/4

42

298.45

62.5

8.46

 -

 -

 -

 -

 -

 -

11 3/4

47

298.45

69.94

9.53

PSB

 -

 -

 -

 -

 -

11 3/4

54

298.45

80.36

11.05

PSB

 -

 -

 -

 -

 -

11 3/4

60

298.45

89.29

12.42

PSB

PSB

PSB

PSB

PSB

PSB

11 3/4

65

298.45

96.73

13.56

 -

P

P

P

P

P

11 3/4

71

298.45

105.66

14.78

 -

P

P

P

P

P

13 3/8

48

339.72

71.43

8.38

-

-

-

-

-

-

13 3/8

54.5

339.72

81.1

9.65

PSB

-

-

-

-

-

13 3/8

61

339.72

90.78

10.92

PSB

-

-

-

-

-

13 3/8

68

339.72

101.19

12.19

PSB

PSB

PSB

PSB

PSB

-

13 3/8

72

339.72

107.15

13.06

-

PSB

PSB

PSB

PSB

PSB

16

65

406.4

96.73

9.53

-

-

-

-

-

-

16

75

406.4

111.61

11.13

PSB

-

-

-

-

-

16

84

406.4

125.01

12.57

PSB

-

-

-

-

-

16

109

406.4

162.21

16.66

P

P

P

-

P

P

18 5/8

87.5

473.08

130.21

11.05

PSB

-

-

-

-

-

20

94

508

139.89

11.13

PSLB

-

-

-

-

-

20

106.5

508

158.49

12.7

PSLB

-

-

-

-

-

20

133

508

197.93

16.13

PSLB

-

-

-

-

-

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

Mechanical Properties:

Group

Grade

Type

Total elongation under load        %

Yield strength   Mpa

Tensile strength  min     MPa

Hardness  max

min

max

HRC

HBW

1

2

3

4

5

6

7

8

9

1

 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

-

-

2

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

1?2

0.5

621

724

689

25.4

255

C95

-

0.5

655

758

724

-

-

T95

1?2

0.5

655

758

724

25.4

255

3

P110

-

0.6

758

965

862

-

-

4

Q125

All

0.65

862

1034

931

-

-


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

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