Drill bit of rotary drilling rig

The invention discloses a drill bit of a rotary drilling rig. The drill bit comprises a barrel, a spiral piece and a rotary drill, one end of the barrel body is connected with the drill rod, the spiral sheet is spirally arranged on the barrel body, and an internal thread is arranged on the inner wal...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG JIE, HUANG XIAOBING, ZHANG JUNFU, HE XIANG, HU XIAOBING, FAN RONGQUAN, JING HAIBING
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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