EXCAVATION METHOD AND DEVICE

PROBLEM TO BE SOLVED: To eliminate the need for the selection of a place because a low bed type turning device is used, to simply exchange and use screw drilling and down the hole hammer drilling quickly and to efficiently excavate a ground by using an excavation means fitted for the ground and geol...

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Bibliographische Detailangaben
1. Verfasser:	NAKAYAMA KANAME
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 eliminate the need for the selection of a place because a low bed type turning device is used, to simply exchange and use screw drilling and down the hole hammer drilling quickly and to efficiently excavate a ground by using an excavation means fitted for the ground and geology. SOLUTION: The turning device 1, to which a center-hole revolution body 5 in which an engaging section for a clutch conducting common engagement with a casing 3 and a screw blade 20 is formed to the internal surface of a hole is mounted, is installed, and a down the hole hammer 2 and an auger screw 18 are set to the turning device 1 in an exchangeable manner as required and excavation is conducted.