Anti-disengaging connecting device and anti-disengaging connecting assembly for drill rod

The invention provides an anti-disengaging connecting device for a drill rod, and anti-disengaging connecting assembly for the drill rod. The anti-disengaging connecting device comprises a connectingsleeve and an anti-disengaging member, wherein the connecting sleeve and a bit shank are coaxially ar...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	ZHOU XIUJING
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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