METHOD OF PRODUCTIVE FORMATION PROCESSING AND DEVICE FOR ITS IMPLEMENTATION AS PER PGDA-M TECHNOLOGY Russian patent published in 2016 - IPC E21B43/263 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil and gas industry and can be used for productive formation processing. Method involves gas-dynamic formation fracturing by combustion in the productive formation interval of a powder charge of solid-propellant material with a filler burning-stabiliser having a round central channel with simultaneous accumulation of powder gases pressure in the central charge channel cavity, with further transfer of the charge combustion energy to the formation. Combustion of the powder charge is performed in several modes, wherein the number and the frequency of pulses depend on the combination of charges formed as blocks on cylindrical surfaces of which directed parallel to their central channel axis there are mutually perpendicular-longitudinal slots of an evenly even amount. Device comprises a caseless charge of solid-propellant material, connected to a conducting wire made as a cylindrical stick with an igniter and the central channel, having the ratio of length to diameter equal to (30-38): 1. Note here that on the cylindrical surface of the stick parallel to the axis of its central channel there are mutually perpendicular-longitudinal slots, and their number is evenly even, which ensures the possibility of alternating the charges depending upon the method: 4+8 or 4+8+12, while two of the slots have a flexible element connected with the conducting wire.

EFFECT: technical result consists in improved efficiency of affecting on oil-and-gas-bearing formations.

4 cl, 6 dwg