Patent ID: 8475230
Filing Date: 2013-07-02
Classification: B24C,E21B

Abstract:
1. An apparatus for cutting or drilling by means of a gas-carrying or low-density fluid-carrying abrasive jet stream containing abrasive particles, said apparatus comprising: an abrasive-laden primarily liquid or high density supercritical fluid under predetermined pressure and temperature; a nozzle having an inlet converging conic section for admitting said abrasive-laden primarily liquid or high density supercritical fluid under predetermined pressure and temperature and for increasing the velocity of said abrasives and fluids; said nozzle having a narrow diameter aperture throat section to accelerate the velocity of said abrasive particles; said nozzle having a diverging conic discharging section, whereby said primarily liquid or high density supercritical fluid expands into its gas carrying or low-density phase; and wherein said inlet converging conic section leads to said narrow diameter aperture throat section, which further leads to said diverging conic discharging section.