Spherical reaming bit

Details Spherical reaming bit Spherical reaming bit

1995-02-03

1996-01-23

Neuder, William P.

Boring or penetrating the earth

Enlargement of existing pilot throughbore requiring...

175406, E21B 1022

Patent

active

054858887

ABSTRACT:
A reamer bit for reaming in earth formations. In one embodiment, the bit provides a plurality of levels of stems onto which may be disposed semi-spherical reamer cutters. The cutters are arranged such that they are circumscribable within a sphere. The levels of stems may include as few as two stems or several. This arrangement provides for a significantly larger cutting area which, in turn, prevents premature bit wear. As s further advantage, the bit may include several levels with roller cutters having progressively increasing diameter to provide an arrangement which subscribes to a generally triangular formation.

REFERENCES:
patent: 4241799 (1980-12-01), Going, III
patent: 4244433 (1981-01-01), Kellner
patent: 4280571 (1981-07-01), Fuller
patent: 4399879 (1983-08-01), Liljekvist
patent: 4484783 (1984-11-01), Emmerich
patent: 4591008 (1986-05-01), Oliver
patent: 4610317 (1986-09-01), England et al.
patent: 4641718 (1987-02-01), Bengtsson
patent: 5145016 (1992-09-01), Estes
patent: 5413183 (1995-05-01), England

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