Controllable gas-lift well and valve
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United States of America Patent
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-
Apr 6, 2004
Grant Date -
Sep 4, 2003
app pub date -
Jan 24, 2001
filing date -
Jan 24, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A gas-lift well having a controllable gas-lift valve is provided. The well uses the tubing and casing to communicate with and power the controllable valve from the surface. Induction chokes at the surface and downhole electrically isolate the tubing from the casing. A high band-width, adaptable communication system is used to communicate between the controllable valve and the surface. Additional sensors, such as pressure, temperature, and acoustic sensors, may be provided downhole to more accurately assess downhole conditions. The controllable valve is varied opened or closed, depending on downhole conditions, oil production, gas usage and availability, to optimize production and assist in unloading. While conventional, bellows-type, gas-lift valves frequently fail and leak--often undetected--the controllable valve hereof permits known precise operation and concomitant control of the gas-lift well.
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