Drilling bit assembly and apparatus

Details Drilling bit assembly and apparatus Drilling bit assembly and apparatus

2005-09-20

2005-09-20

Lee, Jong-Suk (James) (Department: 3673)

Boring or penetrating the earth

With below-ground tool drive prime mover

With mechanical motion-converting means

C175S101000, C464S018000, C464S020000

Reexamination Certificate

active

06945338

ABSTRACT:
A drill bit comprises a shank member (31), a bit body (32) provided with cutters (33) and flexible material (35) between the shank (31) and the bit body (32) allowing relative tilting movement therebetween to reduce adverse effects caused by vibration of the bit. In other embodiments, flexible material is provided between the bit body and the cutters. In further embodiments, the flexible material may be provided in a tiltable sub-assembly for incorporation in a drilling above the drill bit. An apparatus for simulating drilling conditions is also provided.

REFERENCES:
patent: 2740651 (1956-04-01), Ortloff
patent: 3135103 (1964-06-01), Black
patent: 4261425 (1981-04-01), Bodine
patent: 4904228 (1990-02-01), Frear et al.
patent: 5836407 (1998-11-01), Leroy
patent: 4123639 (1993-01-01), None

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