VARIABLE CHOKE FOR USE IN A SUBTERRANEAN WELL AND METHOD OF CONTROLLING A FLUID FLOW

摘要

A flow control apparatus and associated methods of using provide enhanced longevity and reliability without requiring complex mechanisms. In a described embodiment, a choke for use within a subterranean well has a choke member set which may be opened by manipulation of an inner tubular cage (42). The inner cage is displaced from within an outer sleeve (50), which restricts fluid flow through ports (60, 62) formed through a sidewall portion of the inner cage. As the inner cage is progressively withdrawn from within the sleeve, the fluid flow through the ports is decreasingly restricted by the sleeve.