METHOD FOR IMPROVING EXTRACTION OF HYDROCARBONS Russian patent published in 2014 - IPC E21B43/16 E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: extraction method of hydrocarbons from an underground header involves the following: pumping of the first fluid medium to the first horizontal well in the header at initial pumping pressure; with that, the first fluid medium is pumped to the first well using the first device; extraction of hydrocarbons from the second horizontal well located under the first well; continuous pumping of the second fluid medium to the third well located in a plan view at some distance from the first and the second wells, for displacement of fluid medium to a tank in the direction of the second well until a hydraulic connection is established with the second well, thus continuing extraction of hydrocarbons from the second well; selective completion of pumping in the first well when the second well has a hydraulic connection to the third well, and continued extraction of hydrocarbons from the second well after pumping in the first well is stopped, and continuation of pumping of the second fluid medium to the third well after pumping in the first well is stopped.

EFFECT: improved extraction of hydrocarbons from an underground header.

36 cl, 10 dwg