OIL EXTRACTION METHOD Russian patent published in 2006 - IPC E21B43/14 

FIELD: oil industry, possible use during simultaneously separate extraction of oil and bed water in the well.

SUBSTANCE: method includes separate draining from productive bed through well of oil onto day surface and of water into lower level by two pumps, mounted at various depths. In accordance to method, as lower pump, electric centrifugal pump is used, directed downwardly and having tail with packer on lower part, packer being mounted above ceiling of formation into which water is forced, or lower. Upper pump is mounted at maximal height. Ratio of productiveness for lower and upper pumps is selected depending on ratio of amount of water and oil coming into well. Total productiveness of pumps is selected from condition of gravitational division of bed liquid in well onto oil and water and draining water without any oil by lower pump. Emulsion breaker is dosed into space between lower and upper pumps.

EFFECT: minimization of water presence in extracted oil and oil presence in water extracted collaterally and fed into lower levels.

2 cl, 1 ex, 1 dwg