Frangible flapper means

Frangible flapper means

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...

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1. Verfasser: JOSEPH L. PEARCE
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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creator JOSEPH L. PEARCE
description 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.
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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. 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PEARCE</creatorcontrib><title>Frangible flapper means</title><description>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. 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PEARCE</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_GB2257185B3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1994</creationdate><topic>EARTH DRILLING</topic><topic>EARTH DRILLING, e.g. DEEP DRILLING</topic><topic>FIXED CONSTRUCTIONS</topic><topic>MINING</topic><topic>OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS</topic><toplevel>online_resources</toplevel><creatorcontrib>JOSEPH L. PEARCE</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>JOSEPH L. PEARCE</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Frangible flapper means</title><date>1994-09-07</date><risdate>1994</risdate><abstract>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.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record>
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subjects 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
title Frangible flapper means
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