Wellhead production blowout preventer ram
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United States of America Patent
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-
Jun 16, 1998
Grant Date -
N/A
app pub date -
May 30, 1996
filing date -
May 29, 1996
priority date (Note) -
In Force
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Abstract
The rubber layer on the ram is reinforced at the sealing areas by forming ribs on the ram core. The ribs function to resist extrusion of the rubber layer when the blowout preventer is subjected to high pressure from the well.
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