FIELD: oil and gas producing industry. SUBSTANCE: several sets of rams are placed on the same plane for their synchronous displacement. To achieve this, a ram- type preventer comprising a body provided with an axial hole and accommodating rams mounted in tiers and their guides is provided with a changeable basing having a labyrinth threading and circular stop groove on its external surface and mounted in the body hole for interaction with the lower tier rams. EFFECT: enlarged operating capabilities. 2 cl, 7 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| UNIVERSAL PREVENTER | 1991 |
|
RU2013519C1 |
| BLOWOUT PREVENTER | 0 |
|
SU1735570A1 |
| MULTIFUNCTIONAL DRIVE OF RAM-TYPE BLOWOUT PREVENTER | 1993 |
|
RU2097527C1 |
| UNIVERSAL DRIVE OF SLIP-TYPE PREVENTER | 1993 |
|
RU2085701C1 |
| BLOWOUT PREVENTER | 1991 |
|
RU2008434C1 |
| BLOWOUT PREVENTER | 0 |
|
SU1620606A1 |
| BLOWOUT PREVENTER | 0 |
|
SU1744237A2 |
| DEVICE FOR SINKING AND LIFTING OF INSTRUMENTS FROM VERTICAL AND INCLINED HOLES | 1990 |
|
RU2007555C1 |
| PREVENTING DEVICE | 2002 |
|
RU2237795C2 |
| ANCHOR PACKER | 1998 |
|
RU2135739C1 |
