Gas flow control device
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United States of America Patent
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Aug 8, 2006
Grant Date -
Oct 4, 2001
app pub date -
May 20, 1997
filing date -
Jan 27, 1993
priority date (Note) -
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Abstract
Invention is of an improvement to seat of gate valves used for gas-lift producing oil wells, consisting of a seat lower part of which is curved there being a straight vertical art and a sloping straight lower part, central spacing consisting of a first part in the shape of a tapered nozzle at which gas is gradually speeded up, a second part which is the main restriction to flow, and a third part in the shape of a conical diffuser at which gas is gradually slowed down.
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