COMPOSITIONS AND METHOD TO DAMAGE FLUID MEDIA OF HYDRAULIC FRACTURING Russian patent published in 2013 - IPC C09K8/90 E21B43/267 

FIELD: mining.

SUBSTANCE: composition includes an oxidising component and an ester component. The damaging composition of a fluid medium of hydraulic fracturing of borate structuring, containing an oxidising component, including an aqueous solution, of at least one chlorite of an alkaline metal in absence or in presence of an oxidising additive and an ester component, containing at least one ester of carbonic acid, having from 2 to 20 atoms of carbon, where an ester group is a carbyl group having from 1 to 10 atoms of carbon, one or more atoms of carbon may be substituted with atoms of oxygen, and the ratio of the oxidising component to the ester component makes from around 4:1 to around 20:1. The composition of the fluid medium of fracturing, containing the fluid medium of borate structuring fracture, including a structured gel, a borate structuring agent and efficient amount of the above damaging composition. The method of impact at a bed, including pumping of the above fracturing medium into the bed in conditions of fracturing, the damaging composition reduces viscosity of the fluid medium of fracture by the controlled manner, reducing viscosity of the fluid medium within the specified time gap.

EFFECT: reduced formation of residues and their lower restoration as temperature and pH reduce.

22 cl, 3 ex, 3 dwg