Integral Heavy Wight Drill Pipe
The wall thickness of heavy weight drill pipe 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
|
Size |
O.D. |
I.D. |
ToolJoint |
ToolJoint |
Thread |
Max.elevator |
Central |
Mindrift |
|
31/2 |
31/2 |
21/4 |
43/4 |
21/4 |
NC38 |
37/8 |
4 |
2 |
|
21/16 |
21/16 |
213/16 |
||||||
|
4 |
4 |
21/2 |
51/4 |
21/2 |
NC40 |
43/16 |
41/2 |
21/4 |
|
29/16 |
29/16 |
25/16 |
||||||
|
41/2 |
41/2 |
211/16 |
61/4 |
211/16 |
NC46 |
411/16 |
5 |
217/16 |
|
23/4 |
23/4 |
21/2 |
||||||
|
213/16 |
213/16 |
29/16 |
||||||
|
5 |
5 |
3 |
65/8 |
3 |
NC50 |
51/8 |
51/2 |
23/4 |
|
51/2 |
51/2 |
31/4 |
7 |
31/4 |
51/2FH |
511/16 |
6 |
3 |
|
33/8 |
33/8 |
31/8 |
||||||
|
37/8 |
37/8 |
35/8 |
||||||
|
4 |
4 |
33/4 |
||||||
|
65/8 |
65/8 |
4 |
8 |
4 |
65/8FH |
615/16 |
71/8 |
33/4 |
|
41/2 |
41/2 |
41/4 |
||||||
|
5 |
5 |
43/4 |
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