Method and apparatus for autonomous downhole fluid selection with pathway dependent resistance system
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United States of America Patent
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Jul 14, 2015
Grant Date -
Aug 23, 2012
app pub date -
May 2, 2012
filing date -
Aug 18, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Apparatus and methods for controlling the flow of fluid, such as formation fluid, through an oilfield tubular positioned in a wellbore extending through a subterranean formation. Fluid flow is autonomously controlled in response to change in a fluid flow characteristic, such as density or viscosity. In one embodiment, a fluid diverter is movable between an open and closed position in response to fluid density change and operable to restrict fluid flow through a valve assembly inlet. The diverter can be pivotable, rotatable or otherwise movable in response to the fluid density change. In one embodiment, the diverter is operable to control a fluid flow ratio through two valve inlets. The fluid flow ratio is used to operate a valve member to restrict fluid flow through the valve.
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