PACKER (VERSIONS) Russian patent published in 2012 - IPC E21B33/12 

FIELD: oil-and-gas industry.

SUBSTANCE: set of inventions relates to sealing of oil or gas well hole. In compliance with the first version, packer comprises hollow cylindrical barrel with top and bottom supports, sealing element confined by top and bottom end washers and top and bottom anti-extrusion rings. Note here that inner edges of support washers are bent toward sealing element. Top support is arranged on barrel via adapter while bottom support is shaped to cone moving relative to packer barrel. Note here that sealing is composed of several rubber glands with their conical ends jointed together. Note that polyurethane anti-extrusion rings are fitted on support metal washers to rest on top support and cone. Second and third versions differ from the first one in design and arrangement of elements supporting sealing element, and combination of aforesaid rings and washers.

EFFECT: higher reliability and efficiency.

5 cl, 3 dwg