Patent ID: 9404349
Filing Date: 2016-08-02
CPC Classification: E21B

Claim Text:
1. An apparatus for autonomously controlling fluid flow in a subterranean well, the apparatus comprising: a fluid passageway having a fluid diode positioned therein; the fluid diode having opposing high resistance and low resistance entries through which fluid may enter or exit the fluid diode; the low resistance entry providing a relatively low resistance to fluid flowing into the diode through the low resistance entry; and the high resistance entry providing a relatively high resistance to fluid flowing into the diode through the high resistance entry, and wherein the high resistance entry has a concave, annular surface surrounding an orifice, wherein the fluid passageway is one of a pair of parallel passageways that extend between a common inlet where fluid may be divided into the pair of parallel passageways and respective outlets where fluid may be recombined from the pair of parallel passageways.