FIELD: mining.
SUBSTANCE: group of inventions relates to mining and can be used for hydraulic fracturing of formation. Hydraulic fracturing of formation is performed in uncased well shaft area without annular space isolation. Annular space is blocked by extending elements, located behind insulation valves. Extending elements can contain biologically decomposable plug, which ensures extending elements extension by means of pressure application. With plug, remaining in place, additional pressure can be supplied until pushing out of, at least, part of fragile material onto formation surface. At least part of pushed out fragile material creates seal between extending elements end and formation surface to ensure pressure increase up to exceeding of formation fracturing gradient and formation hydraulic fracturing.
EFFECT: technical result consists in improvement of formation hydraulic fracturing efficiency in uncased well shaft area.
19 cl, 16 dwg
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