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API Casing

Keywords: Seamless (SMLS), Electric Resistance Welded (ERW);Casing;oil pipe
Size: OD: 4 1/2’’ ~ 20’’ (114.3mm ~ 508mm);WT: 0.205’’ ~ 0.635’’ (5.21mm ~ 16.13mm);LENGTH: R1, R2, R3
Standard & Grade: API 5CT J 55/K55/N80/C75/L80/C90/T95/Q125
Ends: Beveled, Square Cut, With LTC/STC/BTC/VAM Connection
Delivery : Within 30 days and Depends on your order quantity
Payment: TT, LC , OA , D/P
Packing: Protection Caps in Both Ends, Waterproof Paper Wrapped, Two Tags
Usage: Used as the Structural Retainer for the Walls of Oil, Gas Wells

Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or well bore.It is inserted into a well bore and cemented in place to protect both subsurface formations and the well bore from collapsing and to allow drilling fluid to circulate and extraction to take place. Steel Casing Pipes have smooth wall & minimum yield strength of 35,000 psi.


Well Casing serves as well sidewall. Standards and Technical Conditions for Supply:API Spec 5CT ISO13680 Grade: J55, K55, N80-1,N80-Q, L80-1, L80-9Cr,L80-13Cr,C95, P110. Tread types: NUE, EUE, VAM, STC, LTC, BTC, special clearance, XC,VAM TOP,NEW VAM.


Oil Casing Pipe: Casings are used for fixing the well wall or down hole, which have wide diameters, can be divided into conductor casings, technical casings and Oil casings.

Uses: Well Casing serves as well sidewall.

Standards and Technical Conditions for Supply:API Spec 5CT

Grade of pipe casing: J55, K55, N80-1,N80-Q, L80-1, L80-9Cr,L80-13Cr,C95, P110.

Tread types of pipe casing : STC, LTC, BTC, special clearance, XC,VAM TOP,NEW VAM.

Dimension: OD: 114.3-508mm WT: 5.21-16.13mm


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

-

-


Tolerance

Types of steel tubes

Outer Diameter

Wall Thickness

Cold-rolled tubes

Tube sizes(mm)

Tolerances(mm)

Tolerances(mm)

114.3

±0.79

12.5%




Chemical Composition

StandardGradeChemical compositions(%)
API SPEC 5CTJ55CSiMnPSCrNiCuMoV
K550.340.390.200.351.251.50≤0.020≤0.015≤0.15≤0.20≤0.20//
N800.340.380.200.351.451.70≤0.020≤0.015≤0.15///0.110.16
L800.150.22≤1.000.251.00≤0.020≤0.01012.014.0≤0.20≤0.20//
P1100.260.3950.170.370.400.70≤0.020≤0.0100.801.10≤0.20≤0.200.150.25≤0.08


Mechanical Properties

GradeTypeTotal elongation under load (%)Yield strength (min)Yield strength (max)Tensile strength min MpaHardness Max (HRC)Hardness Max(HBW)
J55-0.5379552517--
K55-0.5379552655--
N8010.5552758689--
N80Q0.5552758689--
L8010.555265565523241
L809Cr0.555265565523241
L8013Cr0.555265565523241
C90-0.562172468925.4255
C95-0.5655758724--
T95-0.565575872425.4255
P110-0.6758965862--
Q125All0.658621034931--



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