Drill bit assembly with an indenting member

Details Drill bit assembly with an indenting member Drill bit assembly with an indenting member

2007-06-05

2007-06-05

Dang, Hoang (Department: 3672)

Boring or penetrating the earth

Processes

C175S381000, C175S385000, C175S404000

Reexamination Certificate

active

11306307

ABSTRACT:
In one aspect of the invention a drill bit assembly has a body portion intermediate a shank portion and a working portion. The working portion has a recess with a side wall which is substantially coaxial with the shank portion. At least one cutting element is attached to the side wall and an indenting member is disposed within the closed end. In another aspect of the invention a method includes providing a drill bit assembly with a recess formed in a working portion of the assembly. The working portion has a plurality of cutting elements and the recess has at least one cutting element. The method further has steps of cutting a formation with the plurality of cutting elements and also of penetrating a conical profile of the formation which is formed by the recess.

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