Wells – Means for forming filter beds
Patent
1987-08-27
1989-03-21
Kisliuk, Bruce M.
Wells
Means for forming filter beds
166317, 166325, 1375278, 251338, 251368, E21B 4304, E21B 3406, F16K 1514
Patent
active
048134813
ABSTRACT:
A flapper valve assembly includes a frangible valve closure member which is supported by an elastomeric hinge. The frangible valve closure member is a tempered glass plate, and the hinge is a block of elastomer material which is secured to the glass plate by a molecular bond. In one embodiment, the hinge includes an integrally formed elastomeric jacket which partially encapsulates the glass sealing element and is bonded thereto. In one arrangement, a fluid seal is provided by a resilient, elastomeric seal which is received within a valve pocket, and which is engaged directly by the glass plate. In another arrangement, an annular valve seat is formed in a valve housing sub, with the fluid seal being provided by the elastomeric jacket which is fitted about the glass closure plate.
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Brown Kennedy J.
Giusti, Jr. Frank
Grant Richard L.
Sproul Richard M.
Griggs Dennis T.
Kisliuk Bruce M.
Otis Engineering Corporation
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