J. Ed Akin Rice University Houston
N. Roland Dove, Stephen K. Smith Vortexx Group Inc. Bellaire, Tex.
Lee M. Smith Security DBS Houston
Drillers can easily orient this fluted nozzle by aligning the arrow in the desired direction, using a common spark-plug wrench. For PDC bits, the arrow is typically oriented parallel to the nearest blade (Fig. 3).
New developments in the geometric design of fluted drill-bit nozzles increase penetration rates while extending bit life.
This design retains the noncircular, interior-transition surface of prior nozzles, including a fluted channel and sharp interior edges. However, the nozzles now terminate in a...