Drill bit assembly

Details Drill bit assembly Drill bit assembly

2007-09-18

2007-09-18

Dang, Hoang (Department: 3672)

Boring or penetrating the earth

Processes

C175S321000, C175S381000, C175S385000

Reexamination Certificate

active

11164391

ABSTRACT:
In one aspect of the present invention a drill bit assembly comprises a body portion intermediate a shank portion and a working portion. The working portion has at least one cutting element. The body portion has at least a portion of a reactive jackleg apparatus which has a chamber at least partially disposed within the body portion and a shaft movably disposed within the chamber, the shaft having at least a proximal end and a distal end. The chamber also has an opening proximate the working portion of the assembly.

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