PDC clad drill bit insert
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United States of America Patent
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Oct 6, 1998
Grant Date -
N/A
app pub date -
Jun 7, 1996
filing date -
Jun 7, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An insert construction is set forth comprising a right cylinder insert body crowned with a PDC crown bonded thereto defining an interface between the two materials. The interface construction is described in geometric terms. The interface includes irregular curvilinear sided depressions to enhance the interface grip between the two materials thereby reducing shear stress concentration which might damage the PDC crown. Other failure modes are reduced also. Relationships are set forth in the amount, depth, and shape of the depressions.
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