Definition(s)
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