Analytical and experimental study of self-resonating water jets: Nozzle-jet and wall-jet interactions

The studies described in this report are part of an ongoing effort to understand and develop cavitating jets which will enhance the performance of bits used to drill for geothermal or fossil energy. During the first phase we found that the existing CAVIJET/reg sign/ cavitating fluid jet nozzle designs were capable of operating under certain limited downhole conditions, and improved rates of penetration (ROP) were observed with two-cone roller bits during both laboratory and field trials. 26 refs., 75 figs.