THERMAL METHOD FOR EXTRACTION OF HIGH-VISCOSITY OIL THROUGH VERTICAL WELL WITH CREATION OF FILTER AROUND IT Russian patent published in 2019 - IPC E21B43/24 E21B43/04 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry – oil production by thermal methods, and can be used for extraction of high-viscosity oil from vertical well and creation of high-efficiency filter around it. Method includes construction of vertical well with casing string, upper and lower intervals of communication with formation, running along casing string of pump with string below lower interval of communication with formation, separation of communication intervals with formation, pumping high-temperature substance into upper interval of communication with formation on annular space of well and withdrawal of product from lower interval of communication with formation on pipe string. High-temperature substance used is a light fraction of extracted oil with a sublimation temperature by a distillation plant placed on the surface and fed in a mixture with grains of filter material. Casing string is lowered to the stop in the well bottom and perforated in the upper interval of communication with the formation with holes sizes larger, and in the lower interval of communication with the formation with the holes sizes is less than the grain size of the filtering material.

EFFECT: reduced specific heat costs and increased permeability and stability of the zone around the well.

1 cl, 1 dwg