FIRE HEAT GENERATOR, SYSTEM AND METHOD FOR INCREASING RESERVOIR RECOVERY Russian patent published in 2016 - IPC E21B43/24 E21B36/02 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to fire devices, systems and methods and can be used for producing steam at extraction of hydrocarbons. Device for fire steam generation 10 comprises combustion chamber having at inlet and outlet manifold housing connected to the side of combustion chamber inlet with possibility to feed fuel and oxidiser into combustion chamber, an outer case 11 forming coolant chamber 30 between its inner surface and external surface of the combustion chamber, and multiple converging inlets 31 for feeding refrigerant from the cooling agent chamber 30 to combustion chamber. Converging intake holes 31 for coolant are arranged radially around the combustion chamber and are made to form a convergent-divergent nozzle from coolant fed into combustion chamber at outlet side or near the outlet side of the combustion chamber, when the combustion products pass through it. Water is used as a coolant.

EFFECT: invention allows to increase production of hydrocarbons from underground hydrocarbon formations, higher efficiency, reliability and wear resistance of firing devices at long-term continuous operation.

47 cl, 12 dwg