FACILITY FOR IMPROVEMENT OF BED FILTRATION IN ITS BOTTOM HOLE ZONE Russian patent published in 2008 - IPC E21B43/02 E21B43/263 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry and can be used for increasing of filtration properties of producing bed in zone of its opening due to creation of ruptures. Facility for improvement of bed filtration in its bottom hole zone includes charges of solid fuel, put into at least one chamber, and cumulative charges put into another chamber, at least into one. Also there is a device for mounting the facility in the well, then a unit of initiation of burning of hard fuel charges and/or explosion of cumulative charges. At that the chamber with a hard fuel charge is connected to the chamber of cumulative charges by means of a unit with axial pass-through channel and with apertures, made on a side surface and pressure tight closed with the possibility of flowing of combustion products of solid fuel charges into the well, when the device is in a working position. Flow of combustion products is foreseen at pressure in their chamber of not less, than 3 times higher of hydrostatic pressure in the well and during time of stabilisation of bed ruptures.

EFFECT: upgraded efficiency of operation of facility for improvement of bed filtration.

12 cl, 3 dwg