Drill rod

The utility model discloses a drill rod, including the borer body, with borer body nested contact's shank collar, the center of shank collar be equipped with the trepanning, the shank collar cup joints with the borer body through the trepanning to be connected, the borer body is equipped with t...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	JIANG JINGCUN
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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