HEAT GAS GENERATOR FOR IMPROVEMENT OF FORMATION FILTRATION IN ITS WELL BORE ZONE Russian patent published in 2012 - IPC E21B43/263 

FIELD: oil and gas industry.

SUBSTANCE: heat gas generator includes container, container suspension device in the well in the form of a pipe string, at least two gas-generating charges of solid fuel with various gas-generating capacity. Gas-generating charges are placed into the container in zones of radial holes distributed on side surface of the container. Besides, heat gas generator includes burning initiator of one of the solid fuel charges with lower gas-generating capacity, channel of burning transfer from one gas-generating charge to the other gas-generating charge with the specified burning time. Burning transfer channel has the possibility of preventing mutual penetration of combustion products. At that, length of burning transfer channel is 10-25% of the length of the preceding charge with lower gas-generating capacity and provides together with gas-generating charges a common mode of non-stationary action on well bore zone with the specified amplitude, time of action and rise of action power.

EFFECT: increasing operating efficiency of the device.

8 cl, 1 dwg