PULSE HYDRORUPTURE IMPLEMENTATION METHOD Russian patent published in 2010 - IPC E21B43/26 

FIELD: mining.

SUBSTANCE: invention relates to mining and may be used for development and recovery of yield of production wells having decreased as a result of the hole-bottom zone mudding with asphaltresinparaffin formations and mechanical contaminants. The method involves formation of pressure drops within the hole-bottom zone and the well cavity by way of creating periodical pressure pulses within the hole-bottom zone in a fluid mass motion wave travelling about the well cavity which is generated as a result of periodical opening of the well cavity to the mouth for discharge of pressurised fluid and increase of pressure with the help of valves. Preliminarily one estimates the time of the fluid mass motion wave travel from the mouth to the hole-bottom zone and duration of the stratum cracks expansion and closure. One recovers in the well cavity the initial pressure whereunder the stratum cracks are closed. Then the fluid topping up valve is opened for some time during which the fluid mass motion wave reaches the hole-bottom zone and impacts the stratum cracks. Then the fluid topping up valve is closed and the fluid drain valve is opened for reduction of pressure in the well to the initial level.

EFFECT: improved efficiency of the method due to possibility to receive high pressure pulses in the well sump by way of setting the borehole fluid mass column into motion with an acceleration and its inhibition.