PDC cutter with stress diffusing structures
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United States of America Patent
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May 13, 2014
Grant Date -
Sep 1, 2011
app pub date -
Aug 14, 2008
filing date -
Aug 17, 2007
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Abstract
A PCD cutting element for use in earth boring drill bits where die interstices remote from the working surface are filled with a catalyzing material and the interstices adjacent to the working surface are substantially free of the catalyzing material is described. An intermediate region between the substantially free portion and filled portion has a plurality of generally conically sectioned catalyst-free projections which taper down, extending to a second depth from the planar working surface, preferably about 0.5 times or more of the first depth.
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