Wye Spool

Spool between the master and swab valves of a TFL tree, that allows the passage of TFL tools from the flowlines into the bores of the tree.

Source: API SPEC 17D, Design and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment, Upstream Segment, Second Edition May 2011 (Errata September 2011). Global Standards

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