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US 6,604,587 B1Granted
Flat profile cutting structure for roller cone drill bits
AssigneeSmith International, Inc.
InventorsAmardeep Singh, Sujian Huang
Life of this patent
Estimating the term…
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AssigneeSmith International, Inc.
InventorsAmardeep Singh, Sujian Huang
Estimating the term…
A drill bit including a roller cone and a plurality of cutting elements. The roller cone is affixed to a bit body and is arranged circumferentially about a bit axis of rotation. In one aspect, the cutting elements are arranged so that the crests of at least half of the cutting elements are within about 10 degrees of perpendicularity to the bit axis when each of these cutting elements is in a downwardmost rotary orientation. In another aspect, the roller cone and the cutting elements are arranged so that crests on the cutting elements define a substantially flat profile. Substantially flat in this aspect includes the profile having an endmost angle, either at the gage side or the centerline side, with respect to perpendicular to the bit axis, of less than about 11 degrees.
A drill bit comprising:
A drill bit comprising:
A drill bit comprising:
Dependencies are inferred from the claim text.