PCD PERCUSSION DRILL BIT
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United States of America Patent
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N/A
Issued Date -
Jul 23, 2009
app pub date -
Nov 19, 2008
filing date -
Jan 22, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The invention is embodied in a percussion drill bit which comprises a steel body with a working front head portion having a front central zone and plural wing zones radiating from the central zone and being spaced at the outer circumferential edges thereof; first gauge-cutting PCD inserts are secured in the wing zones to extend forwardly at an angle relative to the axis of the bit, and of at least one second core-cutting PCD insert is non-axially secured to extend forwardly from the central zone.
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