Variable flow resistance with circulation inducing structure therein to variably resist flow in a subterranean well

摘要

A variable flow resistance system for use in a subterranean well can include a flow chamber having an outlet and at least one structure which resists a change in a direction of flow of a fluid composition toward the outlet. The fluid composition may enter the chamber in the direction of flow which changes based on a ratio of desired fluid to undesired fluid in the fluid composition. Another variable flow resistance system can include a flow chamber through which a fluid composition flows, the chamber having an inlet, an outlet, and a structure which impedes a change from circular flow about the outlet to radial flow toward the outlet. r Cl 'cz 'I L7~ (5 ~Hz~ .7/ 'A 'St Cl frN __ ' Th A Cl [I (I) / VA t~rCNCl / < $ 7 / / -(IILffi,. 7j ___ -~ 7 / - ___ ___-___ -7 -4- . '/Wt ' /