CHARGE FOR POWDER PRESSURE GENERATOR (VARIANTS) Russian patent published in 2021 - IPC E21B43/18 

FIELD: oil industry.

SUBSTANCE: group of inventions relates to the field of the oil industry, namely to powder pressure generators intended for treatment of a productive formation for intensification thereof. The charge for a powder pressure generator comprises an ignition apparatus. The charge itself is comprised of artillery powder installed in tight concentric rows in form of a cylinder without a central axial channel or with a central axial channel of any shape, wherein the products are placed on an appropriately sized rig using said channel. The rows are firmly attached to each other into a single charge by gluing the charge along the entire length by a solvent. The middle row of the charge is located at a certain distance lower than the outer rows, forming an end "groove" and a "tail" section. The "tail" part of the next charge is installed into the end "groove" of one charge, forming a firmly fixed, nominally sealed structure of the powder pressure generator. The ignition apparatus is installed in the end groove of the charge. It constitutes a nichrome spiral filament wound onto a powder element made of artillery powder. The ignition apparatus can be hermetically filled with a liquid flammable composition.

EFFECT: increased efficiency of processing due to the possibility of regulating the burning charge surface and the pressure pulse level, as well as increased operation stability of the apparatus.

2 cl, 3 dwg