A VALVE, A FLOAT SHOE AND A FLOAT COLLAR FOR USE IN THE CONSTRUCTION OF OIL AND GAS WELLS

A valve for use in the construction of oil and gas wells, which valve comprises means (12, 15, 24) responsive to hydrostatic pressure to close said valve, and frangible member to maintain said valve in an open position in which fluid can pass through said valve, characterised in that said frangible...

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Bibliographic Details
Main Author GIROUX, RICHARD LEE
Format Patent
LanguageEnglish
French
Published 03.06.1999
Edition6
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
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Summary:A valve for use in the construction of oil and gas wells, which valve comprises means (12, 15, 24) responsive to hydrostatic pressure to close said valve, and frangible member to maintain said valve in an open position in which fluid can pass through said valve, characterised in that said frangible member comprises a shear ring (16) the arrangement being such that, in use, when said valve is subjected to a predetermined hydrostatic pressure said shear ring will shear and thereby permit said valve to close.
Bibliography:Application Number: CA19982311362