Patent ID: 8616290

Claim:
A method of fluid flow control 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 characteristic which changes over time, the apparatus comprising: flowing fluid through a first and second passageways positioned in a housing, the flow defining a flow ratio; flowing fluid through an outlet positioned in the housing; varying resistance to fluid flow through at least one of the first and second passageways, the resistance variation dependent on change in the fluid characteristic; changing the flow ratio in response to varying the resistance through at least one of the first and second passageways; moving a valve element positioned in the housing in response to changing the flow ratio; restricting fluid flow through the outlet in response to moving the valve element; and moving a fluid restrictor arm adjacent the outlet in response to movement of the valve element, wherein the valve element has a first arm positioned adjacent the first passageway and a second arm positioned adjacent the second passageway.