Multi-sectional percussive drill bit assembly

Details Multi-sectional percussive drill bit assembly Multi-sectional percussive drill bit assembly

2006-11-27

2008-09-02

Wright, Giovanna C (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

C175S414000, C175S415000

Reexamination Certificate

active

07419017

ABSTRACT:
A multi-sectional percussive drill bit assembly for drilling holes in earth formation primarily used in conjunction with a pneumatic percussive device. The drill bit assembly is comprised of an easily removable bit that is rotationally driven by a lug and pocket structure and axially limited in travel by means of retaining members.

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Web pages featuring Center Rock, Inc.'s Bit Viper Winged Reaming System acquired from centerrock.com between the end of Oct. 2007 up to Nov. 7, 2007; 2 pages; no date of earliest publication is known.
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