Diamond cutting structure for drilling hard subterranean formations
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United States of America Patent
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Oct 24, 1995
Grant Date -
N/A
app pub date -
Mar 30, 1993
filing date -
Mar 30, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A rotary drag bit for drilling hard rock formations with substantially planar PDC cutting elements having diamond tables backed by substrates which flare or taper laterally outwardly and rearwardly of the cutting edge of the diamond table. A cutting structure defining a 'lipped' cutting edge is also disclosed.
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