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API 5DP drilling seamless S135 5 1/2FH 5 1/2" /5" drill pipe

 

Product description:Kelly is the drive part of whole drill stem, it has two types, square kelly and hexagonal kelly and all of them are manufactured comfort to API Spec7-1 and SY/T6509-2000 criterion.

Our Square& Hexagonal kelly are made from AISI 4145H modified alloy bars that are quenched and tempered full length. After such heat treatment, its brinell hardness can reach 285-341. Kelly’s’end, drive cross-section and joint are all processed and tested comform to API criterion.  

The Main Technical Specification of Kelly ( Square& Hexagonal ) 

API 5DP drilling seamless S135 5 1/2FH 5 1/2" /5" drill pipe

Pipe body

Upset type

Tool joint

Designation

Nominal

weight

Grade

 

Wall thickness

in.

mm

lb./ft

kg/m

in.

mm

2 7/8

73.0

10.40

15.48

E,X,G,S

0.362

9.19

I,E

NC31

3 1/2

88.9

13.30

19.80

E,X,G,S

0.368

9.35

I,E

NC38

3 1/2

88.9

15.50

23.08

E

0.449

11.40

I,E

NC38

3 1/2

88.9

15.50

23.08

X,G,S

0.449

11.40

E,I,E

NC38

4 1/2

114.3

16.60

24.71

E,X,G,S

0.337

8.56

E,I,E

NC50

4 1/2

114.3

20.00

29.78

E,X,G,S

0.430

10.92

E,I,E

NC50

5

127.0

19.50

29.03

E

0.362

9.19

I,E

NC50

5

127.0

19.50

29.03

X,G,S

0.362

9.19

E,I,E

NC50

5

127.0

25.60

38.11

E

0.500

12.70

I,E

NC50

5

127.0

25.60

38.11

X,G,S

0.500

12.70

E,I,E

NC50

5 1/2

139.7

24.7

33.57

E,X,G,S

0.415

10.54

I,E,U

51/2FH


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