METHOD FOR OIL EXTRACTION FROM WATERING WELLS AND DEVICE REALIZING SAID METHOD Russian patent published in 2004 - IPC

FIELD: oil extracting industry. SUBSTANCE: method includes lifting gas and fluid mixture by means of well pump. With increase of water amount in extracted product mode of extracting and lifting of extracted product is adjusted on basis of well location in structure of oil deposit, geological and physical conditions of oil layer structure and characteristics of fluids filling the layer. Depression value is decreased, and at the same time depth of descent and productiveness of well pump are also decreased. Lesser speed of layer water lifting is ensured comparably to speed of oil emergence in said water. Front of oil extraction and pressure increase in oil layer is increased. According to the method, when oil layer is watered, but still contains remaining blocks of oil, and layer product constantly moves during extraction, water occupies lower portions of layer, and oil occupies upper portions of structure elevations. In case of maintaining depression level in pit-face adjacent well area, which doesn't disturb process of redistribution of individual components of extracted product, and which facilitates oil accumulation in dome portion of structures and macrostructures. By means of said depression, oil displacement along oil layer and oil influx into well are maintained. Oil in well shaft emerges through water amount set in well shaft at given height, according to conditions of maintaining optimal mode. Previously, demulsifier dissolvent is fed into pit-face adjacent area. During the process, uninterrupted oil emergence through water amount, oil separation from remaining water in oil-water separator, and oil accumulation in accumulating enclosure are assured. Oil is then pumped from accumulating enclosure. Separated water is transferred to the well together with demulsifier fed into the water. Water excess is thrown out through reflux valve into watered portion of oil layer. Device has accumulating enclosure in form of ring-shaped space between tubing strings of pipes of lesser and greater diameters. Pipes of greater diameter form the body of accumulating enclosure, which is supported on rods higher on the tubing string of pipes of greater diameter than tubing pipes lowered into accumulating enclosure together with well pump of given diameter. Below accumulating enclosure oil-water separator is placed, said separator being isolated from accumulating enclosure, and in middle portion of which a separating compactor is inserted, by means of which lower well portion is separated from upper well portion. Below separating compactor apertures for intake of extracted well product. EFFECT: profitable oil extraction. 3 cl, 3 dwg