• News and Events

Casing, Tubing And Drill Pipe


The production line of heat treatment equipped with the advanced machining equipments and monitoring instruments ,which is one of few domestic advanced production lines, can heat treated annually more than 150,000 tons of pipes to calculate polish rod only. All kinds of drill pipes with diameter of Φ60.3—Φ139.7mm and steel grade of G105、S135 can be produced in drill pipe workshop. Seven advanced flow production lines have been established in machining workshop and are able to machine 300,000 tons of tubing, casing, couplings, sieve tube etc with the sizes of Φ60.3~Φ508mm and grades of J55, K55, N80, L80, P110 annually.

Specifications Of Tubing And Casing(Including Couplings):

No.

Outside diameter

Wall Thickness

Type of end-finish

Grade

Type of Pipe

inch

mm

inch

mm

1

2⅜

60.3

0.190

4.83

NUE、EUE

J55、N80、L80、P110、N80Q、L80-1

Seamless

2

2⅞

73.0

0.217

5.51

NUE、EUE

J55、N80、L80、P110、N80Q、L80-1

Seamless

3

88.9

0.254

6.45

NUE、EUE

J55、N80、L80、P110、N80Q、L80-1

Seamless

4

114.3

0.205

5.21

STC

J55、N80Q、L80-1

ERW

5

0.224

5.69

STC、BTC

J55、N80Q、L80-1

ERW

6

0.224

5.69

STC、BTC

J55、K55、N80Q、L80-1、P110

Seamless

7

0.250

6.35

STC、LTC、BTC

J55、N80Q、L80-1

ERW

8

0.250

6.35

STC、LTC、BTC

J55、K55、N80、L80、P110、N80Q、L80-1

Seamless

9

0.290

7.37

LTC、BTC

N80、L80、P110、N80Q、L80-1

Seamless

10

0.337

8.56

LTC、BTC

N80、L80、P110、N80Q、L80-1

Seamless

11

139.7

0.244

6.20

STC

J55、N80Q、L80-1

ERW

12

0.275

6.98

STC、LTC、BTC

J55、N80Q、L80-1

ERW

13

0.275

6.98

STC、LTC、BTC

J55、K55、N80Q、L80-1、P110

Seamless

14

0.304

7.72

STC、LTC、BTC

J55、N80Q、L80-1

ERW

15

0.304

7.72

STC、LTC、BTC

J55、K55、N80、L80、P110、N80Q、L80-1

Seamless

16

0.361

9.17

LTC、BTC

N80、L80、P110、N80Q、L80-1

Seamless

17

0.415

10.54

LTC、BTC

N80、L80、P110、N80Q、L80-1

Seamless

18

7

177.8

0.231

5.87

STC

J55、N80Q、L80-1

ERW

19

0.272

6.91

STC

J55、N80Q、L80-1

ERW

20

0.317

8.05

STC、LTC、BTC

J55、N80Q、L80-1

ERW

21

0.317

8.05

STC、LTC、BTC

J55、K55、N80、L80、P110、N80Q、L80-1

Seamless

22

0.362

9.19

STC、LTC、BTC

J55、N80Q、L80-1

ERW

23

0.362

9.19

LTC、BTC

J55、K55、N80、L80、P110、N80Q、L80-1

Seamless

24

0.408

10.36

LTC、BTC

N80、L80、P110、N80Q、L80-1

Seamless

25

8⅝

219.1

0.264

6.71

STC

J55

ERW

26

0.304

7.72

STC

J55

ERW

27

0.304

7.72

STC

J55、K55

Seamless

28

0.352

8.94

STC、LTC、BTC

J55

ERW

29

0.352

8.94

STC、LTC、BTC

J55、K55

Seamless

30

0.400

10.16

STC、LTC、BTC

J55

ERW

31

0.400

10.16

STC、LTC、BTC

J55、K55、N80、L80、P110

Seamless

32

0.450

11.43

LTC、BTC

N80、L80、P110

Seamless

33

9⅝

244.5

0.312

7.92

STC

J55

ERW

34

0.352

8.94

STC、LTC、BTC

J55

ERW

35

0.352

8.94

STC、LTC、BTC

J55、K55

Seamless

36

0.395

10.03

STC、LTC、BTC

J55

ERW

37

0.395

10.03

STC、LTC、BTC

J55、K55、N80、L80、P110

Seamless

38

0.435

11.05

STC、LTC、BTC

N80、L80、P110

Seamless

39

0.472

11.99

STC、LTC、BTC

N80、L80、P110

Seamless

40

10¾

273.1

0.279

7.09

STC

J55

ERW

41

0.350

8.89

STC、BTC

J55

ERW

42

0.350

8.89

STC、BTC

J55、K55

Seamless

43

0.400

10.16

STC、BTC

J55

ERW

44

0.400

10.16

STC、BTC

J55、K55

Seamless

45

0.450

11.43

STC、BTC

J55、K55、N80、L80

Seamless

46

13⅜

339.7

0.330

8.38

STC

J55

ERW

47

0.380

9.65

STC、BTC

J55

ERW

48

0.380

9.65

STC、BTC

J55、K55

Seamless

49

0.430

10.92

STC、BTC

J55

ERW

50

0.430

10.92

STC、BTC

J55、K55

Seamless

51

0.480

12.19

STC、BTC

J55、K55、N80

Seamless

52

0.514

13.06

STC、BTC

N80

Seamless

Specifications Of Drill Pipe:

No.

Outside diameter

Grade

inch

mm

1

2⅜

60.3

G105、S135

2

2⅞

73.0

G105、S135

3

88.9

G105、S135

4

4

101.6

G105、S135

5

114.3

G105、S135

6

5

127.0

G105、S135