.jpg)
The wall thickness of heavy weight drill pipe
Thechnical specifications and parameters is between drill pipe and drill collar,its structure is simliar with drill pipe.It is made from premium alloyed steel.Its both tool joints and middle upset are welded hardbands.Technical parameters meet with API Spec7-1 Standard.
Thechnical specifications and parameters is between drill pipe and drill collar,its structure is simliar with drill pipe.It is made from premium alloyed steel.Its both tool joints and middle upset are welded hardbands.Technical parameters meet with API Spec7-1 Standard.
|
Size(in)
|
O.D.(in)
|
I.D.(in)
|
Tool Joint O.D.(in)
|
Tool Joint I.D.(in)
|
Thread type
|
Max.elevator diameter(in)
|
Central upset dia.(in)
|
Min drift dia.size(in)
|
|
3 1/2
|
3 1/2
|
2 1/4
|
4 3/4
(4 7/8, 5) |
2 1/4
|
NC38
|
3 7/8
|
4
|
2
|
|
2 1/16
|
2 1/16
|
2 13/16
|
||||||
|
4
|
4
|
2 1/2
|
5 1/4
|
2 1/2
|
NC40
|
4 3/16
|
4 1/2
|
2 1/4
|
|
2 9/16
|
2 9/16
|
2 5/16
|
||||||
|
4 1/2
|
4 1/2
|
2 11/16
|
6 1/4
|
2 11/16
|
NC46
|
4 11/16
|
5
|
2 17/16
|
|
2 3/4
|
2 3/4
|
2 1/2
|
||||||
|
2 13/16
|
2 13/16
|
2 9/16
|
||||||
|
5
|
5
|
3
|
6 5/8
|
3
|
NC50
|
5 1/8
|
5 1/2
|
2 3/4
|
|
5 1/2
|
5 1/2
|
3 1/4
|
7
(7 1/4, 7 1/2) |
3 1/4
|
5 1/2FH
|
5 11/16
|
6
|
3
|
|
3 3/8
|
3 3/8
|
3 1/8
|
||||||
|
3 7/8
|
3 7/8
|
3 5/8
|
||||||
|
4
|
4
|
3 3/4
|
||||||
|
6 5/8
|
6 5/8
|
4
|
8
(8 1/4, 8 1/2) |
4
|
6 5/8FH
|
6 15/16
|
7 1/8
|
3 3/4
|
|
4 1/2
|
4 1/2
|
4 1/4
|
||||||
|
5
|
5
|
4 3/4
|
.jpg)
