FIELD: mining industry, particular, drilling of wells of any purpose. SUBSTANCE: used in the preventer is forced drive of rollers by connection of reversible drive motor. EFFECT: higher reliability of sealing of wellhead and increased service life of roller sealing members. 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| BLOWOUT PREVENTER | 1991 |
|
RU2008434C1 |
| MULTIFUNCTIONAL DRIVE OF RAM-TYPE BLOWOUT PREVENTER | 1993 |
|
RU2097527C1 |
| UNIVERSAL DRIVE OF SLIP-TYPE PREVENTER | 1993 |
|
RU2085701C1 |
| UNIVERSAL PREVENTER | 1991 |
|
RU2013519C1 |
| BLOWOUT PREVENTER | 0 |
|
SU1735570A1 |
| MULTIGATE PREVENTER | 1991 |
|
RU2013520C1 |
| DEVICE FOR SINKING AND LIFTING OF INSTRUMENTS FROM VERTICAL AND INCLINED HOLES | 1990 |
|
RU2007555C1 |
| BLOWOUT PREVENTER | 0 |
|
SU1266963A1 |
| 0 |
|
SU385024A1 | |
| BLOWOUT PREVENTER | 0 |
|
SU1744237A2 |
