E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 10/50 (2006.01) B23P 15/28 (2006.01) E21B 10/46 (2006.01)
Patent
CA 2565201
A rolling cone drill bit is provided that has gage inserts on the first row from the bit axis to cut to full gage diameter that have a cutting portion enhanced with a layer of super abrasive material. The gage cutting surface has a center axis that is canted to be more normal to the gage curve such that the its point of contact at gage is away from the thinner portion of the layer of super abrasive material.
Lockstedt Alan W.
Mcdonough Scott D.
Portwood Gary R.
Smart & Biggar
Smith International Inc.
LandOfFree
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