PDC insert featuring side spiral wear pads
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United States of America Patent
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Mar 19, 1996
Issued Date -
N/A
app pub date -
Oct 17, 1994
filing date -
Aug 17, 1993
priority date (Note) -
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Abstract
The present disclosure sets forth various forms of inserts for operating as elements in bearing drill bits and similar devices. A single insert is formed with an external side face of cylindrical construction. One or more strips of hardened materials such as diamond or other hard material are provided along the side face. At the end face, the insert incorporates exposed tungsten carbide, diamond or other hard material. A PDC layer is optionally placed over the end face. The PDC layer has the form of a covering terminating at a radius of curvature.
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