Spherical mill shoe

The utility model provides a spherical mill shoe. The spherical mill shoe comprises a cylindrical body and a mill shoe part. An upper connector used for being connected with a drill rod is arranged at the upper end of the cylindrical body. The mill shoe part is connected with the lower end of the cy...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	TANG HANLIN, LI HONG, LU AIHUA, ZHOU HONGYUN, YANG GUOHONG, SHI YUANLONG, ZHANG JINGYAN, ZHONG JIAWEI, SHAN QUANSHENG, FU NING, LI QIANG, OU RUXUE, YANG LAISHUN, ZHANG CHAO, ZHOU PENGFEI
Format:	Patent
Sprache:	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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