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Manager Cui: 13722783453
Manager Yang: 13582175373
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Square kelly
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Square kelly

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Number of views:
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The kelly rod is located at the uppermost end of the drill string, transmits torque and bears the weight of the drill string, and is the driving part of the entire drill string. The square drill pipe implements the API Spec7-1 specification, the rod body material is 4145H, after the overall heat treatment, the thread is hardened and then phosphated, and the anti-sticking performance is good. According to customer requirements, 114.3×114.3 and 170×170 square drill pipes can be produced.

Specification of square drill pipe

Drive length m

full length

m

Internal thread connection

Male thread connection

mm

in

Left-handed specifications

Outer diameter mm

specification

Outer diameter

mm

the inside diameter of

mm

76.2

3

11.28

12.19

6 5/8REG

-LH

196.8

NC31

85.7

31.8

88.9

31/2

11.28

12.19

6 5/8REG

-LH

196.8

NC38

120.6

57.2

108.0

41/4

11.28

12.19

6 5/8REG

-LH

196.8

NC46

158.8

71.4

11.28

12.19

6 5/8REG

-LH

196.8

NC50

161.9

71.4

133.4

51/4

11.28

12.19

6 5/8REG

-LH

196.8

NC56

177.8

82.6

11.28

12.19

6 5/8REG

-LH

196.8

51/2FH

177.8

82.6

                                                       

Specification of hexagonal drill pipe

Drive length m

full length m

Internal thread connection

Male thread connection

mm

in

    

Left-handed specifications

Outer diameter mm

specification

Outer diameter

mmr

the inside diameter of

mm

76.2

3

11.28

12.19

6 5/8REG

-LH

196.8

NC26

85.7

31.8

88.9

31/2

11.28

12.19

6 5/8REG

-LH

196.8

NC31

104.8

44.4

108.0

41/4

11.28

12.19

6 5/8REG

-LH

196.8

NC38

120.6

57.2

133.4

51/4

11.28

12.19

6 5/8REG

-LH

196.8

NC46

158.8

76.2
   

11.28

12.19

6 5/8REG

-LH

196.8

NC50

161.9

82.6

152.4

6

11.28

12.19

6 5/8REG

-LH

196.8

51/2FH

177.8

88.9
   

11.28

12.19

6 5/8REG

-LH

196.8

NC56

177.8

88.9

 

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Contact

800 Zhongshan West Road, Shijiazhuang, Hebei Province

Manager Cui: 13722783453

Manager Yang: 13582175373

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Established in 1975, Hebei Shitan Machinery Manufacturing Co., Ltd is subordinated to Hebei Geology and Mineral Industries Department. As the designated production enterprise, Hebei Shitan Machinery Manufacturing Co., Ltd specialized in manufacturing drilling equipment and auxiliary tools. It is a member of China Mining Association,
See more information
Established in 1975, Hebei Shitan Machinery Manufacturing Co., Ltd is subordinated to Hebei Geology and Mineral Industries Department. As the designated production enterprise, Hebei Shitan Machinery Manufacturing Co., Ltd specialized in manufacturing drilling equipment and auxiliary tools. It is a member of China Mining Association,

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