Multi-lobed cutter element for drill bit
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United States of America Patent
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-
Apr 26, 2005
Grant Date -
Aug 5, 2004
app pub date -
Jan 31, 2003
filing date -
Jan 31, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Cutter elements for a drill bits having particular, but not exclusive, application on the nose portion of the cone cutters of a rolling cone bit include a base, a cutting portion, and a plurality of cutting lobes extending radially from the cutting portion. Each lobe includes a forward-facing cutting face and trailing portion having a trailing surface that intersects the cutting face in a nonlinear cutting edge. The trailing surface is non-planar and recedes away from the cutting edge. In certain embodiments, the trailing surface is a partial dome shaped surface. The trailing portion provides strength and buttresses the cutting edge.
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