US 12,291,941 B2
Tubing retrievable safety valve assembly with secondary flapper and seat
Merced Gonzalez, Singapore (SG); and Charles David McFate, Singapore (SG)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Oct. 6, 2022, as Appl. No. 17/938,341.
Prior Publication US 2024/0117709 A1, Apr. 11, 2024
Int. Cl. E21B 34/14 (2006.01); F16K 31/44 (2006.01); F16K 43/00 (2006.01)
CPC E21B 34/14 (2013.01) [F16K 31/445 (2013.01); F16K 43/001 (2013.01); E21B 2200/05 (2020.05); E21B 2200/06 (2020.05)] 17 Claims
OG exemplary drawing
 
9. A method of using a tubing retrievable safety valve assembly, the method comprising:
retaining a primary flapper in a first open position by positioning a flow tube in a first downhole position;
moving the primary flapper from the first open position to a first closed position by shifting the flow tube to a first uphole position;
retaining a secondary flapper in a second open position by positioning a protective sleeve in a second uphole position;
upon failure of the primary flapper, shifting the protective sleeve from the second uphole position to a second downhole position to allow the secondary flapper to move from the second open position to a second closed position;
attaching a secondary opening prong to the flow tube; and
retaining the secondary flapper in the second open position with the secondary opening prong after the protective sleeve is shifted from the second uphole position to the second downhole position.