METHODS AND COMPOSITIONS FOR TREATMENT OF UNDERGROUND SECTIONS Russian patent published in 2009 - IPC C09K8/04 C09K8/52 C08L5/00 C09K8/60 C09K8/62 

FIELD: mining.

SUBSTANCE: method for destructive treatment employed for intensified treatment of underground bed consists in preparing composition of viscous liquid on water base for treatment of bed; said composition contains water, polymer increasing viscosity and soluble in water composition for strongly retarded destruction of polymers containing source of hydrogen peroxide, source of ions of bivalent iron and chelating agent, wherein viscosity increasing polymer corresponds to polysaccharide; source of hydrogen peroxide is chosen from group consisting of tetra-hydrate of sodium perborate and hydrogen peroxide; soluble in water composition for strongly retarded destruction of polymers has molar ratio of chelating agent to source of ions of bivalent iron within range of from 3:1 to 6:1 and pH within range of from approximately 3 to approximately 7; further method consists in introducing composition of viscous liquid for bed treatment into underground section via borehole of well penetrating into underground section; also composition for strongly retarded destruction of polymer destroys composition of viscous liquid for bed treatment creating diluted liquid with low viscosity.

EFFECT: increased efficiency of underground bed treatment.

31 cl, 4 tbl