Arcuate-shaped inserts for drill bits

Details Arcuate-shaped inserts for drill bits Arcuate-shaped inserts for drill bits

E - Fixed Constructions

21

B

E21B 10/08 (2006.01) E21B 10/16 (2006.01) E21B 10/50 (2006.01)

Patent

CA 2431200

Disclosed are a variety of arcuate-shaped inserts for drill bits, and in particular, for placement in rolling cone cutters of drill bits. The arcuate inserts include 36Q degree or ring-shaped inserts, as well as inserts of smaller arcuate length. The arcuate inserts may include stress relieving discontinuities such that, upon assembly into the cone, the arcuate inserts fragment in a controlled and predicted manner into shorter arcuate lengths. The arcuate inserts are suitable for use in all surfaces of the rolling cone cutter, and in other locations in drill bits, and may have specialized cutting surfaces and material enhancements to enhance their cutting duty performance.

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