METHOD OF GATHERING OIL PRODUCTS FROM CONTAMINATED WATER-BEARING BEDS AND HYDROGEODYNAMIC TRAP FOR OIL PRODUCTS Russian patent published in 1995 - IPC

FIELD: oil producing industry. SUBSTANCE: to gather oil products from subterranean waters, water depression well is drilled. This well is intended for withdrawal of water from deep portion of water bearing bed. Drainage trench with pit- accumulator is made in zone of depression cone formed when water is taken out. Oil products collected in depression cone are accumulated in drainage trench and then pumped out to the surface. Mounted above depression cone is antiseepage screen made of clay with vertical wall-barrage arranged downwards in direction of subterranean water flow. Mounted in lower portion of water depression well is water intake pump. Used as such pump is air lift pump. Drainage trenches have pit-accumulator made in form of reservoir with bottom and filter and blind projecting pipe to prevent overflow of oil products. Pump to take out oil products is hydraulically coupled with pit-accumulator. EFFECT: enlarged operating capabilities. 13 cl, 2 dwg