Boring or penetrating the earth – Bit or bit element – Impact or percussion type
Reexamination Certificate
2006-11-01
2008-09-02
Gay, Jennifer H (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Impact or percussion type
C175S057000, C175S405000, C175S106000
Reexamination Certificate
active
07419018
ABSTRACT:
In one aspect of the invention, a downhole drill string component has a shaft being axially fixed at a first location to an inner surface of an opening in a tubular body. A mechanism is axially fixed to the inner surface of the opening at a second location and is in mechanical communication with the shaft. The mechanism is adapted to elastically change a length of the shaft and is in communication with a power source. When the mechanism is energized, the length is elastically changed.
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Dahlgren Scott
Hall David R.
Wilde Tyson J.
Gay Jennifer H
Harcourt Brad
Miskin Benjamin T.
Wide Tyson J.
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