Composite nozzle for earth boring and bore enlarging bits
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United States of America Patent
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-
Jul 12, 1983
Grant Date -
N/A
app pub date -
Aug 12, 1981
filing date -
Aug 23, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite nozzle for a drill bit and a bore enlarging bit, the body of the nozzle, which is adapted to discharge water toward rotary cutters, being fabricated from a ceramic. The nozzle has a bottom surface which is provided with a high-impact metal plate, and a circumferential wall portion also provided with a reinforcing plate.
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