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Phone:19905158858

Fax:86 - 515 – 86582386
E-mail:sale@chinateda.com
Add:Hengji Town, Jianhu County, Yancheng City, Jiangsu Province

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Weighted drill pipe

The wall thickness of the weighted drill pipe is large, which is used between the drill pipe and the drill collar to prevent the stress concentration at the top of the collar and reduce its fatigue. The weighted drill pipes produced by Teda Special Pipe Fittings Co., Ltd. are mainly welded and monolithic, and have spiral and non-magnetic options. Unique types of weighted drill pipes not only meet API 7-1 standards, but also meet the general needs of global customers.

Characteristics (holistic):

Heat treatment before boring can ensure better straightness and rigidity.

Thickening or abrasive discs in the middle of the tube body can prolong service life, reduce borehole resistance and fine adhesion.

The threads after cold rolling and phosphating treatment can increase service life and prevent bonding.

Standard fasteners are equipped with protective caps for pressing steel threads.

Abrasion-resistant belts and inner coatings can be processed according to customer's requirements.

Characteristic (welding type):

The tube and joint are heat treated separately to ensure maximum welding and mechanical properties.

The joint is heat treated by a special heat treatment furnace to ensure the high strength of the threads.

Standard fasteners are equipped with protective caps for pressing steel threads.

Abrasion-resistant belts and inner coatings can be processed according to customer's requirements.

 

Parameter table

 

Tube body

Drill pipe joint

type

weight
lb/ft

torque
ft-lb

Nominal size

internal diameter
in

Nominal pipe size

Joint type and size

external diameter
in

internal diameter
in

in

wall thickness

End body thickening

2 7/8

1 1/2

0.688

2 15/16

NC 26 (2 3/8 IF)

3 3/8

1 1/2

Standard

17.26

3,800

2 7/8

1 1/2

0.688

2 15/16

NC 26 (2 3/8 IF)

3 3/8

1 1/2

Spiral

18.31

3,800

3 1/2

2 1/16

0.719

3 7/8

NC 38 (3 1/2 IF)

4 3/4

2 1/8

Standard

25.65

11,500

3 1/2

2 1/16

0.719

3 7/8

NC 38 (3 1/2 IF)

4 3/4

2 1/8

Spiral

27.14

11,500

3 1/2

2 1/4

0.625

3 7/8

NC 38 (3 1/2 IF)

4 3/4

2 1/4

Standard

23.48

11,500

3 1/2

2 1/4

0.625

3 7/8

NC 38 (3 1/2 IF)

4 3/4

2 1/4

Spiral

24.88

11,500

4

2 9/16

0.719

4  3/16

NC 40 (4 FH)

5 1/4

2 9/16

Standard

29.92

14,600

4

2 9/16

0.719

4  3/16

NC 40 (4 FH)

5 1/4

2 9/16

Spiral

31.51

14,600

4 1/2

2 3/4

0.875

4 11/16

NC 46 (4 FH)

6 1/4

2 13/16

Standard

41.45

14,600

4 1/2

2 3/4

0.875

4 11/16

NC 46 (4 FH)

6 1/4

2 13/16

Spiral

43.31

14,600

5

3

1

5 1/8

NC 50 (4 1/2 IF)

6 5/8

3

Standard

50.38

22,500

5

3

1

5 1/8

NC 50 (4 1/2 IF)

6 5/8

3

Spiral

52.34

22,500

5 1/2

3 1/4

1.125

5 11/16

5 1/2 FH

7 1/4

3 1/4

Standard

61.63

30,000

5 1/2

3 1/4

1.125

5 11/16

5 1/2 FH

7 1/4

3 1/4

Spiral

63.87

30,000

6 5/8

4 1/2

1.063

6 15/16

6 5/8 FH

8

4 1/2

Standard

71.43

63,700

6 5/8

4 1/2

1.063

6 15/16

6 5/8 FH

8

4 1/2

Spiral

74.62

63,700