COMBUSTIBLE-OXIDIZING COMPOSITION FOR THERMOCHEMICAL TREATMENT OF BOTTOM-HOLE FORMATION ZONE Russian patent published in 2002 - IPC

FIELD: oil producing industry, particularly, combustible-oxidizing compounds designed for thermochemical treatment of bottom-hole formation zones; combustible-oxidizing composition may be used in activation or restoration of operation of wells with reduced productivity due to paraffin-hydrate and asphalt-resinous accumulations blocking filtration channels and distributing well communication with field-carrying formation. SUBSTANCE: combustible-oxidizing composition has the following ratio of components, wt. %: saltpeter, 2.0-25.0; complex compound of nitric acid with organic compound, the balance. Organic compound is used in the form of an alkanolamine from series including ethanolamine, diethanolamine, triethanolamine associated with nitric acid in equimolar ratio. Combustible-oxidizing composition has saltpeter in the form of ammonium, potassium, sodium or calcium nitrate, preferably, ammonium nitrate and also ethanolamine. Additional specific additives are possible from group including potassium permanganate, isopropylenecarbon, acetic acid in amount of no less 3% of initial components weight. EFFECT: increased fire and explosion safety in transportation and in operation with composition in any weather. 5 cl, 1 tbl