METHOD FOR DOWNHOLE SEPARATION OF WATER AND GAS AND OIL MIXTURE Russian patent published in 2013 - IPC E21B43/38 

FIELD: oil and gas industry.

SUBSTANCE: method for downhole separation of water and gas and oil mixture includes separation of mixture and separate extraction of mixture components at inclined area of the well with water extraction. Water extraction is done near tubing string wall opposite to the wall, along which the separated flow of oil and gas goes up. In the course of water and gas and oil mixture separation at the inclined area of the well there performed is the deceleration of mixture flow speed by flow passing into the tubing string of larger diameter. Water extraction is done through the shank located near the said opposite wall. The shank is equipped with the holes located along the shank and directed towards the said opposite wall.

EFFECT: maintaining injection capacity of injection wells by cleaning of pumped water from oil products and extraction of extra volume of oil from water supply wells.

2 dwg