| abstract |
Apparatus and methods to form and utilize pulsating fluid pressures in oil well formation treating of producing wells or as a part of secondary or tertiary recovery processes. Self induced or artificially induced liquid-gas phase changes occur in-situ which are utilized to selectively and variably treat oil wells including but not limited to fracturing, temporary or permanent plugging, cementing, drilling, water block and cone prevention, control over the driving and/or driven fluids in primary, secondary or tertiary recovery techniques. |