Acoustic methods for fracturing selected zones in a well bore

摘要: Following is disclosed acoustical well fracturing methods and apparatus whereby pressure fluctuations are generated in a bore by pumping fluid through first conduit to drive an oscillator coupled with compliance that transmits the formation of earth selected zone bore. The bore, which functions as second contains oscillator, returns flow back toward pump means. A variable restriction means such valve used adjust maximum oscillated exceeds required for fracture. To achieve fracture only zone, isolation spaced above below confine zone. Also, another embodiment density circulated selectively varied