NOZZLE HAVING A SPRAY PATTERN FOR USE WITH AN EARTH BORING DRILL BIT

摘要

An earth boring drill bit (28) having a cleaning nozzle (10) for cleaning cutting elements o the face of the drill bit. A notch (16) is included on the nozzle face (18) for directing an elongated an coherent fluid flow from the nozzle outlet to the cutting element face. The nozzle face ma include more than one notch for cleaning elements disposed in locations around the nozzle The nozzle may be at the ends of a row of cutting elements, or disposed in the middle of row of cutting elements.