| 摘要 |
An earth boring drill bit having a cleaning nozzle for cleaning cutting elements on the face of the drill bit. A notch is included on the nozzle face for directing an elongated and coherent fluid flow from the nozzle outlet to the cutting element face. The nozzle face may 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 a row of cutting elements.
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