An improved sonic wave generating device and method transmits variable wave energy to a fluid medium that is transmitted to objects such as subsurface petroliforous formations to be treated. Reverberative pressures and wave energy are reduced by improvements to and from a positive pressure supplied feed...http://www.google.es/patents/US5351754?utm_source=gb-gplus-sharePatente US5351754 - Apparatus and method to cause fatigue failure of subterranean formations
Apparatus and method to cause fatigue failure of subterranean formations
