Enhanced gage protection for milled tooth rock bits
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United States of America Patent
Stats
-
Jun 8, 2004
Grant Date -
Aug 28, 2003
app pub date -
Feb 27, 2002
filing date -
Feb 27, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drill bit including a bit body having at least one roller cone rotatably coupled to the bit body with a plurality of milled teeth formed on the at least one roller cone is disclosed. At least one milled tooth is arranged so as to form a gage row milled tooth, and the gage row milled tooth includes hardfacing thereon. A cutting element insert is mounted in a gage face of the gage row milled tooth. A method of forming a drill bit structure, the method including machining at least one hole in a preselected location on a gage surface of at least one milled tooth, positioning a plug in the at least one hole, applying a hardfacing material to the at least one milled tooth, removing the plug from the at least one hole, and positioning a drilling insert in the at least one hole is also disclosed.
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