FIELD: sealing of wellheads in drilling oil and gas wells. SUBSTANCE: blowout preventer has body 1, cover 2, seal 3, plunger 4 and supporting sleeve. The latter is made in form of two spring-loaded branch pipes telescopically connected to each other to unload threaded joint of body with cover and to prevent misalignment of seal. Upper branch pipe is made for interaction with seal. EFFECT: higher efficiency. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| APPLIANCE FOR REPLACEMENT OF GATE VALVES OF WELLHEAD EQUIPMENT WITHOUT WELL KILLING | 1992 |
|
RU2042789C1 |
| DEVICE FOR SEALING MOUTH OF WELL | 1990 |
|
RU2023863C1 |
| METHOD FOR WASHING OF WELLS | 1990 |
|
RU2023860C1 |
| DRILL PIPE SPINNER | 1991 |
|
RU2023862C1 |
| STATIONARY WRENCH FOR DRILLING EQUIPMENT | 1989 |
|
SU1834351A1 |
| WELL SUCKER-ROD PUMP PLANT | 1991 |
|
RU2022171C1 |
| WELL PUMPING PLANT | 1991 |
|
RU2022172C1 |
| PIPE POWER SLIPS | 1989 |
|
RU2068070C1 |
| INTERNAL RELEASABLE PIPE-FISHING TOOL | 0 |
|
SU1375793A1 |
| VALVE | 1990 |
|
RU2020351C1 |
