The inside blowout preventer is the necessary tool in drilling operations . When the blowout is happened during drilling tools are coming out of hole , the inside blowout preventer is needed , because the drill pipes as much as possible shall be put into hole again.
Technical parameters and specifi cations
| Thread connection |
O.D.(in) |
I.D.(in) |
Thread connection |
O.D.(in) |
I.D.(in) |
| 2 3/8IF |
3 3/8~3 3/4 |
1 3/8 |
4 1/2IF |
6 3/8~7 |
2 13/16 |
| 2 7/8IF |
4 1/8~4 1/4 |
1 9/16 |
5 1/2IF |
7~7 1/2 |
2 13/16 |
| 3 1/2IF |
4 3/4~5 1/4 |
2 |
6 5/8REG |
8 |
2 13/16 |
| 4IF |
6 1/4~6 3/4 |
2 13/16 |
7 5/8REG |
9 1/2 |
2 13/16 | |
