Drill bit insert
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United States of America Patent
Stats
-
Mar 10, 1981
Grant Date -
N/A
app pub date -
Oct 5, 1978
filing date -
Oct 5, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A protruding insert for use in an oil well drill bit is disclosed which insert is made of a hard metal substance and utilizes a tangential spherical surface having opposed flattened sides.
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