CAVITATING JET

摘要

The invention relates to hydromechanics and can be used for deep borehole drilling for cavitation erosion of a bottomhole, for opening-out a new productive layer for a casing pipe perforation, for bed stimulation in order to create channels for inflow pressure, for scraping out a pipe, for dispergating solid particles in a fluid and for mixing nonsoluble fluids, for eliminating microbiological features from a fluid, and also in mass exchange devices and in hydrosystems for forming a cavitating fluid jet. The inventive cavitating jet comprises a body provided with a profiled flow channel and a barrier obstructing a flow. The barrier can move in a radial direction. The jet cavity is divided by a baffle into two chambers and the movable barrier at the extreme position thereof closes the flow section of one chamber. The barrier can be embodied in the form of a ball or cylinder having one or several degrees of freedom for radial displacement and closes at least 80 % of the total section of the jet channel.