CAVIJET™ Augmented Deep-Hole Drilling Bits

[+] Author and Article Information
A. F. Conn

HYDRONAUTICS, Inc., Laurel, Md.

R. P. Radtke

N/L Hycalog, Houston, Tex.

J. Pressure Vessel Technol 100(1), 52-59 (Feb 01, 1978) (8 pages) doi:10.1115/1.3454434 History: Received June 24, 1977; Online October 25, 2010


Drilling bits which exploit the destructive energy of cavitation are being developed. A systematic series of tests is now under way, first to establish feasibility, and then to define the effective adaptation of the CAVIJET™ cavitating water jet method for augmenting the cutting action of mechanical deep-hole drilling bits. Successful drilling tests, using a 1/4-in. (6.4-mm) CAVIJET nozzle, were performed at atmospheric pressure and in a test chamber which provided simulated wellbore pressures up to 3000 psi(21 MPa). The effect of back pressure on standoff distance, and a comparison of steady jet versus CAVIJET cutting efficiencies are discussed.

Copyright © 1978 by ASME
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