Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2005-12-21
2009-02-03
Gay, Jennifer H (Department: 3676)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S081000, C175S074000, C175S325300
Reexamination Certificate
active
07484573
ABSTRACT:
A directional drilling apparatus for mounting a drill bit on a rotatable drill support comprises a member for transmitting rotation from the drill support to a drill bit, and a body mounted to the member. The body is configurable to offset a portion of the member relative to an axis of the body such that directional drilling may be achieved.
REFERENCES:
patent: 2495439 (1950-01-01), Brimble
patent: 4948925 (1990-08-01), Winters et al.
patent: 7234544 (2007-06-01), Kent
Fraser Simon
Hewson James Adam
Mackay Craig
Gay Jennifer H
Harcourt Brad
Makay Christopher L.
Technology Ventures Ltd.
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