Abrasive and boring method using the same

Details Abrasive and boring method using the same Abrasive and boring method using the same

2005-11-01

2005-11-01

Neuder, William (Department: 3672)

Boring or penetrating the earth

Processes

C175S403000, C051S308000

Reexamination Certificate

active

06959771

ABSTRACT:
The present invention relates to an abrasive that decreases the heat generation by a core bit due to boring and allows the boring of a deep hole while maintaining the boring speed even when a deep hole is cut using a dry method. This abrasive contains abrasive grains, particles of anhydrous silica having a particle diameter from 5 nm to 50 nm and silanol groups in the surface thereof, and hydrous resin which discharges water when the hydrous resin is pressed by a core bit or the temperature of the hydrous resin rises. The abrasive51is supplied between the distal end of a rotating core bit11and a working material20.

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European Search Report dated May 22, 2003.
Official Communication from the European Patent Office.

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