|
外径 |
内径 |
螺纹 |
钻具接头 外径 |
钻具接头内径 |
中间加厚直径 |
|
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 |
||||
|
*焊接和整体加重钻杆均适用 |
|||||
