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Method and apparatus for controlling fluid flow using movable flow diverter assembly

  • US 8,757,266 B2
  • Filed: 04/06/2012
  • Issued: 06/24/2014
  • Est. Priority Date: 04/29/2010
  • Status: Active Grant
First Claim
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1. A fluid flow control apparatus for use in an oilfield tubular positioned in a wellbore extending through a subterranean formation, the oilfield tubular for flowing fluid therethrough, the fluid having a density which changes over time, the apparatus comprising:

  • a tool housing;

    a valve assembly positioned in the tool housing and having a valve housing with at least one inlet and at least one outlet;

    a rotatable fluid diverter positioned in the tool housing and adjacent the exterior of the valve housing, the fluid diverter rotated about a longitudinal axis of the fluid diverter by change in the fluid diverter buoyancy in response to change in the fluid density, the fluid diverter rotatable to restrict fluid flow through at least one valve inlet in response to change in the fluid density.

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