WAY TO TREAT CRITICAL AREA OF WELL AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2003 - IPC

FIELD: oil industry, intensification of oil inflows by melting down and removal of asphalt-resin- paraffin deposits from critical area of well. SUBSTANCE: invention is realized by means of device carrying sealed container which upper part is closed by uncontrolled valve. Container is linked to intake carrying side slits. Upper part of intake is connected to depression chamber housing controlled valve. Thermal gas generator positioned in sealed container is delivered into treated interval of well on logging cable. Heat releasing substance in the form of calcium carbide and vessel with water containing decompression unit is placed inside container. Pulse is sent to decompression unit in vessel with water from ground control desk over conductor of logging cable and electric wire. Water interacts with calcium carbide releasing heat and hydrogen, creating pressure inside container and uncontrolled valve-plug opens. Heated mixture goes through slits of intake into well and critical area of pool is treated with hot products of reaction. Technological pause is maintained on termination of reaction till generated heat is utilized completely. Depression action on heat-treated zone is created. Ground control desk sends current pulse to controlled valve decompressing depression chamber. EFFECT: increased efficiency of operations for intensification of oil excavation by melting down and removal from critical area of pool of asphalt-resin-paraffin deposits, excluded effect of hydrostatic pressure on duration of thermal treatment, reduced cost of treatment. 2 cl, 1 dwg