Drilling device and drilling method

Details Drilling device and drilling method Drilling device and drilling method

2008-04-01

2008-04-01

Neuder, William (Department: 3672)

Boring or penetrating the earth

Processes

C175S195000, C408S204000, C408S0010BD

Reexamination Certificate

active

10478756

ABSTRACT:
A drilling device is composed so as to drill a drilled object composed of a brittle material with the end of a rotating core bit by using a core bit in which a bit, formed by dispersing and arranging a cemented carbide or super abrasive in a binder phase, is provided on the end of a cylindrical tube, and rotating the core bit around an axis with a direct motor. The drilling device is composed so that the core bit is rotated such that the peripheral velocity at the outer periphery of the bit is 300 m/min or more while the core bit presses against the drilled object at a pressure of 0.6 N/mm2or more during drilling.

REFERENCES:
patent: 5009705 (1991-04-01), Yoshimura et al.
patent: 5065647 (1991-11-01), Johnson
patent: 5174691 (1992-12-01), Shepley
patent: 6102135 (2000-08-01), Shaw
patent: 61-146412 (1986-07-01), None
patent: 3-3378 (1991-01-01), None
patent: 4-26706 (1992-03-01), None
patent: 5-318212 (1993-12-01), None
patent: 2001-57757 (2001-02-01), None

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