Excavation tool

In an excavation tool of the present invention, an embedding hole 8 is drilled in a distal end portion of a tool body 1 which is rotated about an axis line 0 and is moved forward to a distal end side in a direction of the axis line 0. In the embedding hole 8, an excavation tip 5A in which an embeddi...

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Bibliographische Detailangaben
Hauptverfasser:	Hiwasa, Yoneo, Hisada, Masaya, Nakamura, Kazuyoshi
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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