Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit
Patent
1985-04-05
1987-01-13
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Nonsymmetrical bit
E21B 1000
Patent
active
046357386
ABSTRACT:
A drill bit for drilling bore holes in underground formations comprising a bit body with a connecting spigot for connecting to a drill string or the like, and a cutting head which comprises a circumferential face extending parallel to its longitudinal axis and an end face having a drilling axis which is aligned with the axis of the connecting spigot. The drilling axis is parallel to and is offset relative to the axis of the cutting head. It is preferred that the end face is, at least in part, conical in shape.
REFERENCES:
patent: 2802642 (1957-08-01), Feucht
patent: 2953354 (1960-09-01), Williams, Jr.
patent: 3159224 (1964-12-01), Cleary
patent: 3191698 (1965-06-01), Short
patent: 3924698 (1975-12-01), Juvkam-Wold
patent: 4440244 (1984-04-01), Wiredal
Mengel Hans-Eckhard
Pahlke Klaus
Panhorst Heinz-Juergen
Schillinger Hans
Starke Siegfried
Bagnell David J.
Franklin Rufus M.
Norton Christensen, Inc.
Novosad Stephen J.
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