HYDROCARBON PRODUCTION DEVICES AND METHODS Russian patent published in 2016 - IPC E21B36/00 E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is referred to devices and methods intended for extraction of viscous hydrocarbons from underground reservoirs. According to one version of embodiment the method for extraction of hydrocarbons from underground reservoir is claimed. The method includes stages, which include drilling of an injecting well interconnected with the reservoir having one or more producing wells interconnected with the reservoir. The casing string is mounted in the injecting well. The casing string is cemented. The casing string is perforated. A packer is set in the casing string in order to separate it into the upper volume and lower volume. The downhole steam generator is placed in the upper volume of the casing string so that it is supported by the packer. Flow of fuel, oxidizer and water is supplied to the downhole steam generator in order to release exhaust gas periodically in the reservoir. Injected fluids are supplied to the reservoir. Hydrocarbons are extracted via one or several producing wells.

EFFECT: increased extraction efficiency of oil.

26 cl, 10 dwg