Drag-bit drilling with multi-axial tooth inserts
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United States of America Patent
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-
Oct 16, 2001
Grant Date -
N/A
app pub date -
May 13, 1999
filing date -
May 13, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Angled insertable drag bit teeth having a front portion at an oblique angle to a shank portion: the front portion is nearly parallel to the direction of thrust during cutting, and is bonded, along a substantial part of its length, to a groove in the bit body. The shank portion extends down into a pocket in the bit body. Preferably the front portion is faced with a superhard material such as polycrystalline-diamond-compact.
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