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Retainer valve's functionality in a subsea test tree

Published on 18 Mar 2019 by Tadd Pham

The retainer valve should be incorporated to hold the contents of the upper completion string and/or prevent communication of the upper completion string and marine riser contents after an emergency disconnect of the subsea test tree (SSTT) latch has been performed inside the Blowout Preventer (BOP)/marine riser.