Gas lift valve and method of presetting
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United States of America Patent
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-
Apr 10, 1984
Grant Date -
N/A
app pub date -
Feb 8, 1982
filing date -
Feb 8, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gas lift valve having an adjustable stop for limiting valve stem travel such that the bellows may be preset to assure full valve opening in operation. To preset the valve, the stop is set so that the maximum stem travel is greater than that desired in operation, and an excess operating pressure is applied. The bellows is thereby permanently partially retracted so as to prevent the bellows from limiting stem travel to a distance less than the desired travel when the valve is in operation. The adjustable stop is repositioned to establish the operating stem travel before the valve is placed in use.
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