Hydrodynamic pulse tool

Abstract

A hydrodynamic pulse tool and method for cleaning, stimulation and production enhancement of oil, gas and injection wells by propagating successive pressure waves through the wellbore and/or the producing/injecting formation in a directional or vectored manner. The tool comprises a resonance chamber defined by a generally cylindrical hollow tubular member adapted for connection to conventional coiled or jointed tubing, and at least one hydraulically driven pulse generator rotatably disposed within the resonance chamber. The hydraulic force of pressurized fluid pumped through the tool drives the rotation of the at least one pulse generator, which generates successive sequential hydraulic pressure pulses in a sequential, sequential offsetting and/or sequential reinforcing manner.

1 . A hydrodynamic pulse tool for generating sequential hydraulic pressure pulses within a production or injection well, the tool comprising:
 a generally cylindrical tubular resonance chamber defining at least three annular pulse emitting outlets spaced apart at a regular interval with respect to the longitudinal axis of the resonance chamber; and   at least one pulse generator comprising a cylindrical member with a longitudinal bore, the pulse generator being rotatably disposed within the resonance chamber and further comprising
 a zone dimensioned for rotational sliding fit within the resonance chamber, the zone extending along at least a portion of the outer diameter of the pulse generator, and 
 at least four tangential jets extending between the longitudinal bore and the outer diameter of the pulse generator within the zone, 
   wherein the pulse emitting outlets of the resonance chamber and the tangential jets of the pulse generator are suitably dimensioned such one of the tangential jets of the pulse generator is in substantial fluid communication with one of the pulse emitting outlets at any angle of rotation of the pulse generator within the resonance chamber,   and wherein when pressurized fluid is pumped through the longitudinal bore of the pulse generator, said pressurized fluid exiting the pulse generator through the tangential jet that is in fluid communication with one of the pulse emitting outlets and acts on a wall surface of said pulse emitting outlet to cause the rotation of the pulse generator, thereby causing the sequential generation of pressure pulses within the production or injection well.