US 12,084,937 B2
Barrier arrangement in wellhead assembly
Chris D. Bartlett, Spring, TX (US); Daniel J. McLaughlin, Katy, TX (US); Raymond A. Guillory, Houston, TX (US); Blake T. DeBerry, Houston, TX (US); Marcus Smedley, Houston, TX (US); Gregory K. Norwood, Boerne, TX (US); David A. Scantlebury, Missouri City, TX (US); Andrew B. Mitchell, Houston, TX (US); and Darren W. Mills, Houston, TX (US)
Assigned to Dril-Quip, Inc., Houston, TX (US)
Filed by Dril-Quip, Inc., Houston, TX (US)
Filed on Aug. 22, 2023, as Appl. No. 18/453,649.
Application 18/453,649 is a continuation of application No. 17/889,232, filed on Aug. 16, 2022, granted, now 11,773,678.
Application 17/889,232 is a continuation in part of application No. 17/299,435, granted, now 11,542,778, previously published as PCT/US2019/064485, filed on Dec. 4, 2019.
Claims priority of provisional application 62/775,672, filed on Dec. 5, 2018.
Prior Publication US 2023/0392466 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 33/035 (2006.01); E21B 33/038 (2006.01); E21B 33/043 (2006.01)
CPC E21B 33/0355 (2013.01) [E21B 33/038 (2013.01); E21B 33/043 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A system, comprising:
a tubing hanger positioned in or below a wellhead housing coupled to a subsea well;
a tree cap fluidly coupled to the tubing hanger and disposed atop the wellhead housing;
a pair of master production valves configured to be selectively actuated from an open position to a closed position to shut in the subsea well, wherein the pair of master production valves is located in and part of the tubing hanger; and
an orientation sub configured to be coupled between the tree cap and the tubing hanger such that one or more couplers on the tree cap can be aligned with one or more couplers on the tubing hanger as the tree cap is lowered onto the wellhead housing.