METHOD AND SYSTEM FOR SUPPLY OF HEAT ENERGY TO HORIZONTAL WELL BORE Russian patent published in 2016 - IPC E21B43/24 E21B36/00 

FIELD: mining.

SUBSTANCE: group of inventions relates, mainly, to methods and systems for extracting hydrocarbons from various underground formations. Method for delivery of thermal energy in horizontal hole located in an underground formation, through vertical channel connected to it includes heating heat transfer medium in a heater located on surface. Heat transfer medium is pumped from heater into vertical channel and down along an inner first column of concentric strings to a heat exchanger located in horizontal well bore, and upwards from heat exchanger to surface at a second column of concentric strings. Steam generation is performed in horizontal well bore by feed water supply from surface into vertical channel via a third string of concentric strings to steam chamber located in horizontal well bore, separated with packers and containing said heat exchanger. Heat exchanger pipe transfers heat from heat transfer medium to feed water. Feed water is injected into steam in steam chamber to cause heating underground formation by means of thermal energy added by steam from steam chamber.

EFFECT: high efficiency of extraction of hydrocarbons.

19 cl, 8 dwg