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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Sep 15, 2015
Grant Date -
Oct 3, 2013
app pub date -
Jan 16, 2012
filing date -
Feb 4, 2010
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Abstract
An apparatus is described for controlling fluid flow in a downhole tubular. Fluid is flowed through a flow control system having a flow ratio control system and a pathway dependent resistance system. The flow ratio control system has a first and second passageway, where the ratio of fluid flowing through the passageways dependent on a characteristic of the fluid flow. The pathway dependent resistance system includes a vortex chamber with a first inlet directing flow primarily tangentially into the vortex chamber and the second inlet directing flow primarily radially into the vortex chamber. Undesired fluids, such as gas or water, in an oil well, are directed, based on their relative fluid flow characteristics, into the vortex primarily tangentially, thereby restricting flow when the undesired fluid is present.
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