US 11,753,912 B2
Phase changing gas-lift valves for a wellbore
Michael Linley Fripp, Singapore (SG); Paul James, Spring, TX (US); and Stephen Michael Greci, Little Elm, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Sep. 30, 2021, as Appl. No. 17/491,023.
Prior Publication US 2023/0098639 A1, Mar. 30, 2023
Int. Cl. E21B 34/10 (2006.01); E21B 43/12 (2006.01)
CPC E21B 43/123 (2013.01) [E21B 34/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A gas-lift valve comprising:
a valve housing at least in part defining a chamber for receiving an actuation fluid; and
a flow restrictor having a position that is controllable by adjusting a downhole pressure in a wellbore to cause a phase change of the actuation fluid by changing a density of the actuation fluid in the chamber.