PACKERING DEVICE Russian patent published in 2010 - IPC E21B33/12 

FIELD: mining.

SUBSTANCE: packering device is provided for saving of reservoir properties and preventing of pollutions of bottomhole zone of strata during damping, well starting and in process of its operation. Packering device contains casing, connected to support. Inside casing it is located hollow shaft, connected in top part with fishing head, implemented with side openings. Bottom part of shaft is connected to tail, located inside the support. Shaft is implemented with external projection with pins with ability of projection bearing of shaft into bottom end surface of casing at lifting of packering device upward and vertical movement of pins of shaft by grooves of casing. On top part of shaft it is put sealing element, implemented in the form of alternating rubber glands with spacing washers.

EFFECT: allowing simplicity of implementation, packering device provides essential exceeding of serviceability, it is prevented its jamming by its mechanical additives, adherence of sealing element to production string.

4 cl, 1 dwg