API 5CT K55

API 5CT K55

API 5CT K55 casing pipe is a low-grade steel used in oil drilling. It is commonly used in the extraction of shallow oil and gas. It offers a wider range of uses since it is less expensive than other grades of steel and may be used in shallow wells, geothermal wells, and water wells.

The interface for programming the packing channel for API 5CT K55 and J55 oilfield oil is very similar to J55; there is no major refining within the compound piece, but the yield quality is higher than that of API 5CT J55 steel pipe.

TUSPIPE supply package channels and API 5CT K55 casings complete with string and coupling, or we may substitute our product according on the arrangement. If you are interested in API 5CT K55 casing, we will provide you with the greatest price for the highest quality.

PRODUCT FEATURES

API 5CT K55 Steel Casing ang Tubing Specification

Outer Diameter (Casing Pipe Sizes)

4 1/2″-20″, (114.3-508mm)

Standard Casing Sizes

4 1/2″-20″, (114.3-508mm)

Thread Type

Buttress thread casing, Long round thread casing, Short round thread casing

Function

It can protect the tubing pipe.

API 5CT K55 Tolerance

Item

Allowable Tolerance

Outer diameter

Pipe body

D≤101.60mm±0.79mm

D≥114.30mm+1.0%

-0.5%

Chemical Composition of API 5CT K55

Group

Grade

Type

C

Mn

Mo

Cr

Ni max.

Cu max.

P max.

S max.

Si max.

min.

max.

min.

max.

min.

max.

min.

max.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

 

K55

0.34

0.38

1.25

1.50

0.15

0.20

0.020

0.015

a) The carbon content for L80 may be increased up to 0.50 % maximum if the product is oil-quenched.

b) The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the wall thickness is less than 17.78 mm.

c) The carbon content for R95 may be increased up to 0.55 % maximum if the product is oil-quenched.

d) The molybdenum content for T95 Type 1 may be decreased to 0.15 % minimum if the wall thickness is less than 17.78 mm.

e) For EW Grade P110, the phosphorus content shall be 0.020 % maximum and the sulfur content 0.010 % maximum.

f) NL = no limit. Elements shown shall be reported in product analysis.

Mechanical Analysis of API 5CT K55

API 5CT Casing Pipe Standard

API 5CT Casing Pipe Type

API 5CT Casing Pipe Tensile Strength
MPa

API 5CT Casing Pipe Yield Strength
MPa

API 5CT Casing Pipe Hardness
Max.

API SPEC 5CT

≥517

≥655

—-

API Casing/ API 5CT K55 Casing Tubing Specifications

Code a

Outer Diameter

Nominal Weight
(with thread and
coupling) b, c

Wall Thickness

End Processing Type

mm

kg/m

mm

J55

In

Lb/ft

K55

1

2

3

4

5

7

4-1-2

9.5

114.3

14.14

5.21

S

4-1-2

10.5

114.3

15.63

5.69

SB

4-1-2

11.6

114.3

17.26

6.35

SLB

4-1-2

13.5

114.3

20.09

7.37

4-1-2

15.1

114.3

22.47

8.56

5

11.5

127

17.11

5.59

S

5

13

127

19.35

6.43

SLB

5

15

127

22.32

7.52

SLB

5

18

127

26.79

9.19

5

21.4

127

31.85

11.1

5

23.2

127

34.53

12.14

5

24.1

127

35.86

12.7

5-1-2

14

139.7

20.83

6.2

S

5-1-2

15.5

139.7

23.07

6.98

SLB

5-1-2

17

139.7

25.3

7.72

SLB

5-1-2

20

139.7

29.76

9.17

5-1-2

23

139.7

34.23

10.54

6-5-8

20

168.28

29.76

7.32

SLB

6-5-8

24

168.28

35.72

8.94

SLB

6-5-8

28

168.28

41.67

10.59

6-5-8

32

168.28

47.62

12.06

7

17

177.8

25.3

5.87

7

20

177.8

29.76

6.91

S

7

23

177.8

34.23

8.05

SLB

7

26

177.8

38.69

9.19

SLB

7

29

177.8

43.16

10.36

7

32

177.8

47.62

11.51

7

35

177.8

52.09

12.65

7-5-8

24

193.68

35.72

7.62

7-5-8

26.4

193.68

39.29

8.33

SLB

7-5-8

29.7

193.68

44.2

9.52

7-5-8

33.7

193.68

50.15

10.92

7-5-8

39

193.68

58.04

12.7

7-5-8

42.8

193.68

63.69

14.27

7-5-8

45.3

193.68

67.41

15.11

7-5-8

47.1

193.68

70.09

15.88

8-5-8

24

219.08

35.72

6.71

S

8-5-8

28

219.08

41.67

7.72

8-5-8

32

219.08

47.62

8.94

SLB

8-5-8

36

219.08

53.57

10.16

SLB

8-5-8

40

219.08

59.53

11.43

8-5-8

44

219.08

65.48

12.7

8-5-8

49

219.08

72.92

14.15

Code a

Outer Diameter

Nominal Weight
(with thread and coupling) b, c

Wall Thickness

End Processing Type

mm

kg/m

mm

K55

In

Lb/ft

1

2

3

4

5

7

9-5-8

32.3

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

PSLB

9-5-8

43.5

244.48

64.73

11.05

9-5-8

47

244.48

69.94

11.99

9-5-8

53.5

244.48

79.62

13.84

9-5-8

58.4

244.48

86.91

15.11

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

PSB

10-3-4

51

273.05

75.9

11.43

PSB

10-3-4

55.5

273.05

82.59

12.57

10-3-4

60.7

273.05

90.33

13.84

10-3-4

65.7

273.05

97.77

15.11

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

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

13-3-8

72

339.72

107.15

13.06

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

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

S-Short round thread, L-Long round thread, B-Buttress thread

a. Code is used for ordering reference.

b. The nominal weight of threaded and coupled casing (column 2) is shown for reference only.

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