Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2011-01-11
2011-01-11
Bagnell, David J (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S434000, C175S374000
Reexamination Certificate
active
07866419
ABSTRACT:
An insert for a drill bit that includes a plurality of encapsulated particles dispersed in a first matrix material, where the encapsulated particles include a coarse particle encapsulated within a shell, and wherein the shell comprises abrasive particles dispersed in a second matrix material is disclosed.
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Bagnell David J
Hutchins Cathleen R
Smith International Inc.
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