IMPULSIVE HYDRAULIC FRACTURING METHOD Russian patent published in 2018 - IPC E21B43/26 

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used to develop and restore the flow rate of production wells, that has decreased as a result of the wall packing of the borehole zone of the asphalt-resin-paraffinic formations and mechanical impurities. Method includes injecting liquid into the well cavity, formation of pressure differentials by creating periodic pressure pulses in the borehole zone in the form of a wave moving along the well cavity formed during the periodic opening of the well cavity at the mouth with the use of a valve, injection of fluid into the well is carried out continuously with a flow rate sufficient to open the cracks, but not obstructing the formation of a shock wave. Periodic pressure pulses are created by connecting the wellhead through a valve with a pressurized source of fluid, a continuous liquid injection is performed from a second source of pressurized fluid, in the process of the well treatment, the pressure values of the fluid sources are changed independently from each other, and the duration and frequency of the pressure pulses are also changed.

EFFECT: technical result is to increase the efficiency of the impulsive hydraulic fracturing.

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