GRAVITATIONAL METHOD OF OIL PRODUCTION BY TWO-SHED WELLS Russian patent published in 2022 - IPC E21B43/16 E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry and can be used in the development of oil from old fields in the interval of a horizontal section. The gravity method for oil production by two-head wells is characterized by the construction of a two-head well with a horizontal section. Casing strings are mounted in the completed well from the side of the injection and production mouths into the formation cavity. Inside the casing strings with a loop with access to the productive horizon, a production string is mounted, isolated in the wellhead parts from the casing string by seals. In the horizontal sections of the casing and production strings, holes are made for drainage from the reservoir cavity into the inline space of the production string under the action of the own gravity of the oil-water emulsion. As the intrapipe space is filled, the oil-water emulsion is displaced from the injection wellhead to the production wellhead by cleaning elements launched from the side of the injection wellhead by the launcher and removed together with the oil-water emulsion from the side of the producing wellhead by the receiving device. At the same time, said cleaning elements are pushed in the production string to the production wellhead by high pressure of neutral gas supplied through the discharge wellhead from the compressor connected to the starter. The oil-water emulsion from the receiving device of the producing wellhead is supplied with the help of a main pump for further processing or storage.

EFFECT: reduction of labor intensity and labor costs of oil development.

1 cl, 2 dwg