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

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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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Beschreibung
Zusammenfassung:	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 automatically sealed through the region pressure of the spring in the condition of no pressure under a well, the utility model has the advantages of good sealing performance, long pressurization time, stability, reliability, convenient installation, labor saving, time saving, and high work efficiency.