Casing float collar and float shoe

The utility model discloses a casing float collar and a float shoe which are drilling devices in an oil field. A float collar and a float shoe are connected through a casing. The casing float collar and the float shoe has the advantage of light weight. Because two sets of spring devices are automati...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	TONGQUN ZHANG, RENSHUN WANG
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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