FIELD: oil industry.
SUBSTANCE: valve comprises housing and hollow valving member. The body of the head of the valving member is provided with a ring space. The ring space is in communication with the under-valve space. The under-valve space receives shank of the pressing bushing. The seat of the valve is two-step over the diameter. In operation position, the head of the valve is located in the bottom section of the seat. The movable pressing bushing is mounted in the top section of the seat. The pressing bushing co-operates with the sealing ring made of polyurethane. The through opening in the bushing receives the piston. The piston is locked against the axial movement by pin and arresting washer provided with guiding rod.
EFFECT: enhanced reliability of the valve.
1 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DEVICE FOR EXPOSING AND SIMULTANEOUS-SEPARATE OPERATION OF TWO GAS FORMATIONS | 1991 |
|
RU2017946C1 |
| METHOD FOR CEMENTING SHANK IN WELL AND DEVICE THEREFOR | 2015 |
|
RU2595122C1 |
| OIL-PRODUCING SUBMERSIBLE SINGLE-SCREW PUMP | 2003 |
|
RU2256819C1 |
| METHOD FOR PROCESSING THE BOTTOM-HOLE ZONE OF THE FORMATION AND A JET PUMP AS PART OF A DEVICE FOR IMPLEMENTING THE METHOD | 2022 |
|
RU2783932C1 |
| VALVE OF WIDE-PASSAGE DOWNHOLE PLUNGER PUMP | 2015 |
|
RU2604404C1 |
| WELL VALVE UNIT | 1998 |
|
RU2150575C1 |
| DEVICE FOR LINER CEMENTING IN WELL | 2023 |
|
RU2809844C1 |
| CASING VALVE | 2021 |
|
RU2754743C1 |
| SUBSURFACE SAFETY VALVE | 2017 |
|
RU2651860C1 |
| DOWNHOLE VALVE UNIT | 2011 |
|
RU2455459C1 |
