| 摘要 |
FIELD: oil and gas extractive industry. ^ SUBSTANCE: sealing device has body with lid and, mounted therein, at least one spring-loaded bushing with compacting elements positioned above and below it. In accordance to invention, body of sealing device is made in form of hydro-cylinder, equipped with piston, one or several spring-loaded shells with elastic frame-less or frame packing elements and draining chamber. The latter is equipped with draining connecting pipe and lid with compacting element. Body and piston are equipped with forcing and/or branching channels with connecting pipes. Draining chamber with lid are made with possible screwing into hydro-cylinder to compress packing elements. ^ EFFECT: increased efficiency and reliability of device operation. ^ 22 dwg
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