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...

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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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Beschreibung
Zusammenfassung:	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 body 1 which is rotated around an axis line O and advanced to a front end side in the axis line O direction. The excavation tip 5A integrally formed of a buried part 6 with a cylindrical appearance and a blade edge part 7 is provided in each of the embedding holes 8, with the buried part 6 being inserted into the embedding hole 8, and the blade edge part 7 projecting from the embedding hole 8. The excavation tip is attached such that it is freely rotatable around a central axis C of the buried part 6 during excavation and is prevented from coming off to a front end side in the central axis C direction.