FIELD: units working under high pressures of liquid, for example in deep oil and gas wells. SUBSTANCE: seal works reliably under any pressures of working fluid due to automatic control of pressure of liquid between sealing members in proportion to pressure of working fluid. Piston of movable joint has "piston-rod" pairs and cavities are provided between sealing members and under pistons of said pairs. Rod is in contact with working fluid and piston is in contact with fluid. Cavities are connected by means of passages. Calculations are made for sizes of pairs. EFFECT: enhanced reliability. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| HOOK-WALL TUBING PACKER | 2000 |
|
RU2177532C2 |
| DEVICE FOR PUNCTURING PIPE OF OIL OR GAS WELL | 2000 |
|
RU2188306C2 |
| HYDRAULIC PERFORATOR | 2001 |
|
RU2190759C1 |
| ACTUATOR FOR DOWNHOLE INSTRUMENTS | 2000 |
|
RU2178064C2 |
| HYDRAULIC JET PERFORATOR | 2000 |
|
RU2177536C2 |
| METHOD OF OIL RECOVERY | 2000 |
|
RU2172390C1 |
| PUNCTURING PERFORATOR | 2000 |
|
RU2172394C1 |
| METHOD OF OIL WELL COMPLETION | 2000 |
|
RU2178063C2 |
| METHOD OF SEALING THE SWABBING MEMBER IN PIPE IN THE COURSE OF SWABBING AND DEVICE FOR METHOD EMBODIMENT | 2000 |
|
RU2188936C2 |
| PISTON DEVICE FOR OIL RECOVERY | 2000 |
|
RU2178514C2 |
