Pressure valve assembly for use in gas-lift producing oil-wells
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United States of America Patent
Stats
-
Nov 14, 1995
Grant Date -
N/A
app pub date -
Jan 26, 1994
filing date -
Jan 27, 1993
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A pressure valve assembly for use in gas-lift producing oil-wells includes a cylindrical body, a first pressure chamber including bellows located in the body, a second pressure chamber in the body having a first port for communication with gas pressure in a lining or casing, a second port for communicating the second chamber with a pipe in the lining, a valve stem connected to the bellows for movement in the second chamber and a gate valve assembly connected to the stem in the second chamber for controlling the gas flow between the first and second ports.
First Claim
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