METHOD OF INSULATING WORKS IN PRODUCTION WELL Russian patent published in 2010 - IPC E21B33/13 

FIELD: oil and gas industry.

SUBSTANCE: at the first step there pumped to punched holes of productive formation is cement grouting in the volume required for insulation of channel of overflow between gas- or water-bearing formations and overlapping of oil formation. Special holes are made in the area of bottom of interval of gas-bearing formation and/or area of bottom or top of interval of water-bearing formation. Gel-forming compound is pumped to the above special holes, and after that making-up is performed.

EFFECT: increasing efficiency of insulation works in well owing to preventing gel-forming compound from penetration into productive formation and owing to simplifying the development of productive formation.

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