Large-diameter rock core drill bit

A large-diameter rock core drill bit comprises a barrel and an upper cover plate, the upper cover plate is arranged on the inner wall of the barrel, the upper cover plate is connected to the upper portion of the upper cover plate, two rib plates are connected to the upper portion of the upper cover...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHANG ZHENGYUAN, LU HAO, LU BINGGUANG, CHEN SHOUXU
Format:	Patent
Sprache:	chi ; 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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