THERMOTROPIC GEL-FORMING COMPOSITION Russian patent published in 2010 - IPC C09K8/86 

FIELD: chemistry.

SUBSTANCE: invention relates to oil-extraction industry, particularly to use of thermotropic gel-forming compositions which form gel owing to formation temperature after introduction into the oil formation. The gel-forming composition contains the following in wt %: Commercial-grade aluminium hydroxochloride with pH of its 1% aqueous solution not lower than 3.5 25-40, carbamide 60-75, polyethylene oxide 0.1-0.2.

EFFECT: high effectiveness of the composition owing to its working capacity not only at high temperatures but at moderate formation temperatures as well - approximately 60°C and without using non-technologically efficient reagents such as urotropin, which simplifies the process of preparing the composition, its transportation, storage and use.

2 ex, 2 tbl