US 12,378,850 B2
Fluid flow control system employing gravity driven floats and a valve
Michael Linley Fripp, Carrollton, TX (US); Stephen Michael Greci, Carrollton, TX (US); and Ibrahim El Mallawany, Dhahran (SA)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Apr. 22, 2021, as Appl. No. 17/237,257.
Prior Publication US 2022/0341290 A1, Oct. 27, 2022
Int. Cl. E21B 43/12 (2006.01); E21B 34/08 (2006.01)
CPC E21B 43/12 (2013.01) [E21B 34/08 (2013.01); E21B 2200/02 (2020.05)] 24 Claims
OG exemplary drawing
 
1. A fluid flow control system, comprising:
a fluid flow control valve having a fluid inlet operable to receive fluid, a control inlet operable to receive a control fluid, and a fluid outlet operable to pass the fluid to tubing, the fluid flow control valve having a member that is configured to move from a closed state to an open state to open the fluid outlet based upon the control fluid and move from the open state to the closed state to close the fluid outlet based upon the control fluid; and
a density control valve having an inlet conduit operable to receive the fluid and an outlet conduit coupled to the control inlet of the fluid flow control valve, the density control valve operable to send the control fluid to the control inlet of the fluid flow control valve to open or close the fluid outlet based upon a density of the fluid, wherein the member of the fluid flow control valve is configured such that when it moves between the closed state and the open state it does not prevent the fluid from travelling between the inlet and outlet of the density control valve.