Inverse differential casing cementing float valve
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United States of America Patent
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-
Oct 7, 1986
Grant Date -
N/A
app pub date -
May 2, 1985
filing date -
May 2, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The inverse differential fill-up casing cementing float valve comprises an annular valve housing, back pressure valve assembly, a first differential pressure check valve assembly, a second differential pressure check valve assembly, and cement filler material to retain the valve assemblies within the valve housing.
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