Stable Rotary Drill Bit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Nov 23, 2006
app pub date -
May 10, 2006
filing date -
May 17, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A drill bit comprises a bit body having a plurality of upstanding main blades formed thereon. The main blades have a plurality cutting elements mounted thereon, and they are shaped such that a cutting profile of the bit includes a nose portion, an inner cone region located radially inwards of the nose portion and an outer region located radially outwards of the nose portion. The bit further has at least one additional blade. The additional blade carrying cutting elements located radially inwards of the outer region of the cutting profile, but being substantially free of cutting elements located in the outer region of the cutting profile.
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