EXCAVATION TOOL

PROBLEM TO BE SOLVED: To maintain excavation performance and excavation efficiency over a long period of time by means of an excavation tip, improve lifetime of a tool, and reduce excavation cost per unit depth of an excavation hole.SOLUTION: Embedding holes 8 are formed at a front end of a tool bod...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	NAKAMURA KAZUYOSHI, HISADA KIMIYA, HIWASA YONEO
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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