FACE GENERATOR OF ACOUSTIC VIBRATION AND PROCESS OF RESTORATION OF COLLECTOR PROPERTIES OF FACE ZONE WITH ITS EMPLOYMENT Russian patent published in 2001 - IPC

FIELD: oil industry, intensification of influx of fluid, increased intake capability of wells. SUBSTANCE: elastic member of face generator filled with inert gas is manufactured from oil and gasoline-resistance polymer film in the form of stocking with open lower end and is positioned in pressure accumulation chamber. Thick-wall vessel with high-pressure inert gas has spring-loaded automatically opening valve in its bottom part connected to elastic member. Vortex chamber comprises several members forming confuser slit of rectangular section for injection of fluid and surface of internal circular vortex conduit is so arranged that internal surfaces of confuser slits for injection of fluid has shape of fragments of Archimedean spiral in cross-section. All parts of vortex chamber are made of wear-resistant material. In accordance with process of restoration of collector properties of collector zone of well vibroacoustic treatment of face zone is conducted in certain frequency range with definite pressure amplitude with circulation of working fluid through face generator of acoustic vibration with elastic member loaded with inert gas. Removal of disintegrated sediments to surface is monitored and if no removal is observed smooth change of working frequency is conducted by way of short-time lift of generator to zone of lower pressure to reduce volume of gas in elastic member. After it generator is returned to initial point and treatment is continued with same flow rate of working fluid. On completion of treatment generator is taken out of well and rinsed. On termination of treatment of lower object generator is moved above-lying object. Technical objective of invention lies in increased efficiency of generator thanks to automatic change of working frequency and amplitude of vibrations in time under constant optimum flow rate of working fluid, in prolonged service life of vortex chamber, in enhanced functional reliability of elastic member and safety of operation and maintenance of generator, in raised efficiency of process of restoration of collector properties of face zones of wells thanks to fuller and deeper disintegration of sediments in perforation conduits and porous medium of face zone, including treatment of wells opening several operational objects. EFFECT: raised efficiency of process of restoration of collector properties of face zone of wells. 4 cl, 2 dwg