PROCEDURE FOR ISOLATING OPERATIONS IN WELL AND PACKER EQUIPMENT Russian patent published in 2011 - IPC E21B33/13 E21B33/12 

FIELD: gas-and-oil producing industry.

SUBSTANCE: procedure consists in lowering string with drillable packer on adjusted hydraulic tool, in its installation in specified interval of well and in pumping required volume of material into under-packer space. Further, the adjusted hydraulic tool is retracted from the packer; the overlying interval is processed under pressure or the production string is pressurised for pressure tightness omitting condition time for hardening previously pumped material. The packer has upper and lower dividers. A mechanism of packing fixation consists of catches, on internal surface of which there are teeth interacting with threads on external surface of a packer mandrel. Between an upper cone and a sealing element of the packer there is arranged a bearing sleeve with double-sided saw-like projections and recesses entering response slots of an upper cone and the sealing element; a lower end of this element also has saw-like projections entering response slots of the lower cone.

EFFECT: pumping material in two intervals above and under packer regardless of direction and value of pressure drop.

3 cl, 3 dwg