METHOD OF EXTRACTING LOW-TEMPERATURE PETROTHERMAL HEAT Russian patent published in 2024 - IPC F24T10/20 

FIELD: heat exchange.

SUBSTANCE: invention relates to methods of extracting petrothermal energy with subsequent use in heat supply systems. Method of extracting petrothermal heat from a well with a temperature gradient along a casing pipe with the help of heat carrier circulating in the circuit and used for the needs of heat supply. Heat carrier cooled by the consumer is supplied to the pipe, which is concentrically lowered into the casing pipe, and the heated one rises along the casing pipe and transfers heat to the consumer. Heat carrier heated from heated rock in underground heat exchanger formed by multi-stage hydraulic fracturing, through channels-cracks it enters buffer cavities created by drilling sections of directional wells, and then, through directional casing pipes, it is supplied to the casing pipe.

EFFECT: increased reliability of heat-generating installation for heat supply, reduced depth of drilling without loss of thermal power, increased heat emission of petrothermal well, faster start-up of the unit when using waste oil and gas wells.

3 cl, 1 dwg