Method of completing and maintaining a well

Method of completing and maintaining a well

Flapper means in the form of a one piece frangible, ceramic flapper member (410) is used with an extrusion resistant resiliently faced valve seat. Said flapper member is biased to the closed position and rotatable within a flapper member chamber from an open position during run in to a closed positi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: RALPH H ECHOLS, JOSEPH L. PEARCE, DANIEL L PATTERSON
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:Flapper means in the form of a one piece frangible, ceramic flapper member (410) is used with an extrusion resistant resiliently faced valve seat. Said flapper member is biased to the closed position and rotatable within a flapper member chamber from an open position during run in to a closed position as a result of the withdrawal of a wash pipe and a protector tube from the valve bore. Said frangible flapper means cooperates with said extrusion resistant valve seat to provide a reliable pressure resistant seal. The flapper 410 has a sloping sealing surface, a thickened centre section 415 and an integrally moulded hinge 413.