Hole forming device for all casing pipes with same upper diameter and lower diameter

The utility model relates to the technical field of all-casing drilling, and discloses an all-casing hole-forming device with the same upper and lower diameters, which comprises a driving mechanism, a transmission chain, a connector, a movable drill bit, a connecting rotating shaft and a transmissio...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LIN QUANZHONG, YANG FALONG, LIU JUNTENG, LIN WENJING
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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