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 We supply welded and integral heavy weight drill pipe (API 7-1); their sizes are from 3-1/2 to 6-5/8 inches.

 

Outside Diameter 

Inside Diameter 

Connection 

Tool Joint OD 

Tool Joint ID 

Center Upset Diameter 

in.

in.

 

in.

in.

in.

3-1/2

2-1/4

NC38

4-3/4 (4-7/8, 5)

2-1/4

4

 

2-1/16

 

 

2-1/16

 

4

2-1/2

NC40

5-1/4

2-1/2

4-1/2

 

2-9/16

 

 

2-9/16

 

4-1/2

2-11/16

NC46

6-1/4

2-11/16

5

 

2-3/4

 

 

2-3/4

 

 

2-13/16

 

 

2-13/16

 

5

3

NC50

6-5/8

3

5-1/2

5-1/2

3-1/4

5-1/2FH

7 (7-1/4, 7-1/2)

3-1/4

6

 

3-3/8

 

 

3-3/8

 

 

3-7/8

 

 

3-7/8

 

 

4

 

 

4

 

6-5/8

4

6-5/8FH

8 (8-1/4, 8-1/2)

4

7-1/8

 

4-1/2

 

 

4-1/2

 

 

5

 

 

5

 

*For both integral and welded heavy weight drill pipe. 
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