DIRECTED HYDRAULIC FRACTURING OF ROCK MASSIF Russian patent published in 2014 - IPC E21B43/26 

FIELD: mining.

SUBSTANCE: invention relates to mining, particularly to destruction, drying and degassing of rocks, extraction of injection of formation fluids, removal of contraction stress and creation of watertight screens. Proposed comprises well drilling, sealing of fracture interval and injecting the working fluid in fracture interval. Note here that direction of fracture favourable development is set by non-destructive variation of strained state of rocks about the well before hydraulic fracturing by non-uniform loading the well walls or by non-uniform heating of said walls, or by creation of irregular fluid filtration flow from the well into rocks or from rocks into well. In hydraulic fracturing, fracture is developed continuous to preset size thereof.

EFFECT: lower labour input, higher reliability, enhanced performances.

7 cl, 2 dwg