MODIFIED CUTTERS AND A METHOD OF DRILLING WITH MODIFIED CUTTERS
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United States of America Patent
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Issued Date -
Feb 4, 2016
app pub date -
Oct 12, 2015
filing date -
Apr 30, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A cutter for a drag bit may include a substrate and an ultrahard layer on an end surface of the substrate. The ultrahard layer may include an exposed surface having at least three depressions extending from an interior of the exposed surface radially outward to a peripheral edge formed between the working surface and a side surface of the ultrahard layer, the at least three depressions separated from each other by at least three raised regions forming an apex of the exposed surface, the at least three raised regions connected to each other proximate the central axis and extending from proximate the central axis to the peripheral edge. Other working surfaces are also included.
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