DRILL BIT MASK HAVING SUB-MILLIMETER SIZE APERTURES FOR REENTRANT CAVITATION JET DRILLING

摘要

A tricone drill bit having a hollow housing and leg sections holding rotatable cones for drilling rock. The drill bit encloses a cavitation reactor. The cavitation reactor includes liquid and being capable of receiving a laser beam. The cavitation reactor forms cavitation bubbles fin the liquid in response to the laser beam. The cavitation reactor includes a mask having sub millimeter sized apertures for directing cavitation jets formed on the collapse of the cavitation approximately 0.1-10 microns. These reentrant cavitation jets pass easily through the apertures of the mask and to the rock to enable the tricone drill be to operate more efficiently.