Hydraulic stepping valve actuated sliding sleeve
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United States of America Patent
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-
Aug 31, 2004
Grant Date -
Apr 15, 2004
app pub date -
Oct 11, 2002
filing date -
Oct 11, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A downhole well valve having a variable area orifice (26) is flow area adjusted by a sliding sleeve (20) that is axially shifted along a tubular housing (12) interior in a finite number of increments. A hydraulic actuator (60) displaces a predetermined volume of hydraulic fluid with each actuator stroke. An actuator displaced volume of fluid shifts the flow control sleeve by one increment of flow area differential. An indexing mechanism (40) associated with the sleeve provides a pressure value respective to each increment in the increment series.
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