Heavy -calibre bowling formula float collar

The utility model provides a heavy -calibre bowling formula float collar uses with sleeve pipe, guide shoe cooperation, including tubulose body, center tube, disk seat, valve gap, shear pin seat, elastic mechanism and ball, body upper portion is equipped with the box thread with bushing, and the low...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	GUO JIANLONG, LI XUESONG, YANG JIUJIAN, LI SHAOBU
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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