US 12,460,509 B2
Curved flow tube to slow a closure of a flow valve
Michael Linley Fripp, Singapore (SG); Hadi Arabnejad Khanouki, Frisco, TX (US); and David Allen Dockweiler, Singapore (SG)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Dec. 11, 2023, as Appl. No. 18/535,003.
Prior Publication US 2025/0188818 A1, Jun. 12, 2025
Int. Cl. E21B 34/06 (2006.01); E21B 34/14 (2006.01); E21B 34/16 (2006.01); E21B 34/10 (2006.01)
CPC E21B 34/16 (2013.01) [E21B 34/14 (2013.01); E21B 34/066 (2013.01); E21B 34/10 (2013.01); E21B 2200/05 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a tubing string deployable in a wellbore to transport a wellbore fluid; and
a flow valve couplable to the tubing string, the flow valve comprising:
a flapper positionable to control the wellbore fluid transportable through the tubing string, the flapper being adjustable between an open position and a closed position; and
a flow tube positionable in the tubing string, the flow tube comprising a downhole end having a curvature to slow a closure rate corresponding to adjusting the flapper from the open position to the closed position, wherein the curvature of the downhole end corresponds to a roulette curve.