Use of fluidic pressure fluctuation generator to stimulate underground formations

摘要: This invention concerns the use of a fluidic pressure fluctuation generator in well bore to stimulate subsurface formation. The is connected lower end string tubing or drill pipe and suspended adjacent formation interval be stimulated fractured. A fluid pumped down through returned surface annulus between wall bore. backpressure held at on returning such that hydrostatic Ph any level less than hydraulic fracturing but sufficiently great so plus maximum increase Pm caused by said sufficient fracture Other stimulation methods are also described.