METHOD OF CASED WELL PERFORATION WITH HIGH-TEMPERATURE SUPERSONIC GAS JET AND DEVICE FOR METHOD EMBODIMENT Russian patent published in 2002 - IPC

FIELD: oil and gas producing industry, particularly, methods and devices for perforation with high-temperature supersonic gas jet in secondary tapping of formation and completion of cased wells. SUBSTANCE: method includes locking of module with combustion chamber and nozzle, combustion of fuel components in combustion chamber with subsequent acceleration of combustion products in nozzle to supersonic velocity, direction of produced supersonic high-temperature gas jet to destructed barrier and performance of erosion withdrawal of barrier material to formation of channel of hydrodynamic communication of producing formation with well and cleaning of channels. Fuel is used in the form of liquid components of fuel and oxidizer in two tanks. Prior to combustion, fuel components are heated and gasified by energy of exothermic reaction of high-temperature synthesis with accumulation of heat energy by fuel components and vapor-gas. Fuel components are supplied to combustion chamber for combustion after accumulation of required excessive pressure of vapor-gas in formed gas cushion of tanks. Device for method embodiment has body, combustion chamber, nozzle of gas flow acceleration, fuel components supply system, channels for supply of fuel components to combustion chamber and system of electric lighting-up with supply cable. Fuel components supply system is installed on body of module in the form of two tanks containing liquid fuel components. One tank contains oxidizer and the other tank has fuel. Installed in each tank are reactors of high-temperature synthesis with systems of electric lighting-up and supply cables for fuel components heating, their evaporation, accumulation of energy in tanks and supply of fuel to combustion chamber under required excessive pressure. EFFECT: increase kinetic energy and temperature of gas perforating jet. 14 cl, 5 dwg, 2 tbl