"The tubing hanger incorporates a sealing system to ensure that the tubing conduit and annulus are hydraulically isolated." . "Qualified" . "TUBING HANGER" . "TUBING HANGER" . "RDS5796811" . "A well string hanger that is installed on top of the tubing string and supports the string when landed in the tubing hanger or tubing head." . "u20645" . "2006.08.09" . .