Reamer and methods for directional drilling

Details Reamer and methods for directional drilling Reamer and methods for directional drilling

2011-06-14

2011-06-14

Dang, Hoang (Department: 3672)

Boring or penetrating the earth

Enlargement of existing pilot throughbore requiring...

C175S344000, C175S406000

Reexamination Certificate

active

07958950

ABSTRACT:
A reamer for underground boring is provided. The reamer includes at least: (a) a center mandrel, wherein the center mandrel defines a mandrel axis; (b) a plurality of radial members extending radially from the center mandrel; (c) a plurality of cutting heads, wherein each of the cutting heads: (i) is supported by at least one of the radial members; (ii) is arcuately spaced-apart around the center mandrel from the other cutting heads; (iii) has a rounded surface; and (d) a plurality of cutting teeth on the rounded surface of each of the cutting heads. A method of horizontal drilling with the reamer is also provided.

REFERENCES:
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patent: 5224540 (1993-07-01), Streich et al.
patent: 5314267 (1994-05-01), Osadchuk
patent: 5485888 (1996-01-01), England
patent: 5979573 (1999-11-01), Osadchuk
patent: 5979574 (1999-11-01), Osadchuk
patent: 6227311 (2001-05-01), Osadchuk
patent: 7730969 (2010-06-01), Osadchuk et al.
patent: 2009/0159338 (2009-06-01), Buske
Office Action dated Oct. 27, 2009 for U.S. Appl. No. 12/187,521.

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