METHOD OF TREATING BOTTOM-HOLE ZONE OF WELL Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: this is intended for increasing output of fluid at oil production from flowing wells and on artificial lift wells. Bottom-hole zone is subjected to treatment for increasing fluid inflow from microfissures and perforations. For this purpose, effected is suppression of noise spectrum within frequency range of 1-20 kHz. Noise is caused by turbulent mode of flow at withdrawing fluid by pump from perforations and microfissures. Used for realization of this treatment is acoustic device made in the form of quarter-wave resonators which are in series installed and preset on basic frequency $$$ with harmonics $$$ and $$$. In first two harmonics $$$ =1500 Hz, $$$ =4500 Hz, $$$ =7500 Hz and $$$ =10500 Hz, in following two $$$ =2000 Hz, $$$ =6000 Hz, $$$ =10000 HZ, $$$ = 14000 Hz, in following two $$$ =2500 Hz, $$$ =7500 Hz, $$$ =12500 Hz, $$$ = 17500 Hz, and in last two $$$ =3000 Hz, $$$ =9000 Hz, $$$ =15000 Hz and $$$ =0. EFFECT: higher efficiency. 6 dwg