Fishing cup type anti-blocking centralizer

The utility model relates to a fishing cup type anti-blocking centralizer, which is widely used for controlling the quality of a well bore in petroleum drilling operation, and is characterized in thata fishing cup groove is formed in a centralizing block. The clamp tooth screw drill bit has the adva...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	DAI MINGDONG, DAI ZHENGYI, ZENG LING
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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