METHOD OF THERMOBARODYNAMIC STIMULATION OF OIL FORMATION AND DEVICE FOR ITS EMBODIMENT Russian patent published in 2001 - IPC

FIELD: methods of stimulation of oil formations by treatment of bottom-hole formation zones of oil-producing wells. SUBSTANCE: method includes formation of hot gases and heating of fluid in bottom-hole formation zone by hot gas source in closed limited space of bottom hole. Hot gas-liquid mixture is forced into formation under action of pressure built-up in closed limited space of bottom-hole during burning of charge of hot gas source. Bottom-hole formation zone is rinsed with hot gas-liquid mixture by periodic multiple production of short-time pressure differentials and repressions in bottom hole. Prolonged deep pressure differential provides for withdrawal from bottom-hole formation zone of products of stimulation and cleaning, and their withdrawal into implosive chamber and dirty collecting vessel, and lifting to surface. Device for embodiment of claimed method has branch pipe with electric contact head insulated wire in internal cavity. Branch pipe is tightly secured in partition between two rows of radial channels of bottom hole pressure pulser and coaxially fixed in its coupling with the help of centralizer with through longitudinal holes for fluid passage. Device is provided with additional anchor installed above packer to prevent motion of equipment upward over casing string. Safety valve is adjusted to definite operating pressure and installed between bottom-hole pressure pulser and additional anchor. Dirty collection vessel is installed under hot gas source for collecting of settling products of treatment and cleaning for subsequent lifting to surface. EFFECT: higher efficiency of well operation. 7 cl, 4 dwg