Boring or penetrating the earth – Enlargement of existing pilot throughbore requiring...
Patent
1993-05-17
1995-05-09
Neuder, William P.
Boring or penetrating the earth
Enlargement of existing pilot throughbore requiring...
175406, E21B 1022
Patent
active
054131839
ABSTRACT:
A reamer bit for reaming in earth formations. In one embodiment, the reaming bit provides spherical reaming faces with replaceable cutting bit holders. The holders include cutting bits. The spherical reaming faces are not appreciably susceptible to drag during a reaming procedure and premature wear of the faces is alleviated by the provision of bits. The overall result is a substantially improved apparatus for reaming which assists in cost reductions for the process.
REFERENCES:
patent: 4241799 (1980-12-01), Going, III
patent: 4244433 (1981-01-01), Kellner
patent: 4399879 (1983-08-01), Liljekvist et al.
patent: 4484783 (1984-11-01), Emmerich
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