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Inspection

Equipment Inspection / Equipment Inspection Details

What is API casing

There are seamless and welded steel pipes established the API casing. It's an important part of the oil drilling process. It is produced according to the API 5CT standard. It is most often used in underground construction projects to encase or protect utility lines from being damaged. It is widely used in cement projects to serve as the structural retainer for the wall of oil and gas wells or wellbore. API casing is an integral part of the oil drilling and completion process. API casing with a good structure and strength to the walls of the good hole so that it doesn't collapse on itself. It ensures that there is no seepage of oil or natural gas is out of the good hole as these are brought to the surface. It is inserted into a wellbore and cemented to protect both subsurface formations and the wellbore from collapsing and allow drilling fluid to circulate and extract.


Size of API casing

API casing length

API Casing Length:

API 5CT Casing


Range 1

Range 2

Range 3

4.88~7.62

7.62~10.36

10.36~14.63


API casing dimension

API Casing Dimension:

Labels

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;


Manufacturing process of API casing

Steel ingot heating → hydraulic punching → reheating → extension → periodic rolling → reheating → sizing → cooling → straightening → pipe cutting → inspection

1. An annular heating furnace is required for ingot heating;

2. Punching and reheating with the hydraulic press;

3. The oil casing plant uses a two-roller guide plate extension machine for extension;

4. Re-use a disc heating furnace for periodic rolling, and use a non-entry furnace for reheating, cooling, straightening, pipe cutting, and inspection.

Standard of API casing

API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, JIS G3452, BS1387

Application of API casing

  • Oil well extracting 

  • Borehole 

  • Borewell

Apply As Organizations

EOQM