DEVICE FOR REGULATION OF WATER CONE IN WELL Russian patent published in 2014 - IPC E21B43/12 

FIELD: oil and gas industry.

SUBSTANCE: device contains a pump launched into casing string at pipe string with shank end underneath and connected to connecting tube; in the well there are two delivery channels, at that one channel is for oil delivery while the other one is for water delivery from stratum to the well. Channel inputs are located at different levels while outputs are directed to pump suction side. Shank end is equipped from outside with packer installed in casing string at the level of water-oil contact and radial holes of shank end are located higher than packer. At that below radial holes a hollow blind plug is inserted into shank end; connecting tube is inserted into the plug, at that tube can be moved along axis and fixed. However fixation of connecting tube in regard to shank end is made by split locking ring of circular section which is installed in inner groove of the hollow blind plug; this ring fixes the connecting tube in semicircular notches at outside surface of the tube. At that channel for oil delivery is formed by inner space of the casing string upwards packer, radial holes of the shank end and space between the shank end and connecting tube. Channel for water delivery is formed by inner space of the casing string downwards packer and inner space of the connecting tube. Inputs of both channels are located opposite perforated holes in water- and oil-bearing parts of stratum while outputs are directed to pump suction. Due to regulation of water and oil extraction the suggested device also allows preventing mixing of water and oil in process of their raising in the pipe string and producing of product that does not require subsequent separation into different phases; it also allows reducing probability of water-oil emulsion and paraffin deposition in result of fast transfer from water extraction to oil extraction.

EFFECT: ability of water and oil extraction regulation when level of water-oil contact changes in the well during operation process, producing product that does not require subsequent separation into different phases and probability of water-oil emulsion and paraffin deposition at inner surface of pipes.

3 dwg