3rd June, 2026
International Well Control Forum (IWCF) Expands Glossary to Include Four New Languages and Downloadable PDF Versions
Used in some monobore vertical subsea Xmas Tree systems, the THS is a spool connected…
The upper master valve in the production bore of the vertical Xmas Tree.
A Xmas Tree design configured with master valves and swab valve in the vertical bore(s).…
Portion of OWIRS that extends from the tree running tool (TRT) (bottom) to the emergency…
A remotely opened and fail-safe close valve in the production flow path of Xmas Tree.…
An unmanned vehicle for offshore subsea use. Source: API RP 59
A remotely-controlled wireline lubricator system installed onto the subsea Xmas Tree at the seabed for…
Part of the SSTTA, which isolates the well from the TBIRS with or without WL…
The surface flow head (SFH) or surface test tree (STT) is a well barrier element…
Same as SFH. The SFH or STT is a well barrier element installed at the…
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IWCF develop and administer well control training, assessment and certification programmes on behalf of the global oil and gas industry.