ALL CASING TYPE EXCAVATING METHOD AND DEVICE

PURPOSE: To enhance the easiness in works by grounding a middle excavating device unloading the tension of a hand-down wire rope, extending a gripper in the radial direction, and fixing the middle excavating device to the inner surface of the bottom of a casing tube. CONSTITUTION: A middle excavatin...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	SASAKI KIYOMI, MIZUTA SADACHIKA
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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