A Subsea Shut-off Device (SSD) is a large bore well control package (18 ¾ inch), in this case used for installation and retrieval of completion in open water and Plug and Abandonment work.
The SSD is intended to be landed out on top of a re-entry hub on a HXT or onto a wellhead and will have interfaces towards a riserless mud return system and choke and kill lines from surface.
Strategy
- Replace rig with LWI vessel
- Eliminate the use of risers and heavy BOPs
- A more flexible and easier to use solution
- Reduce CO2 footprint
Operational Benefits
- Reduction of cost and operational complexity
- Reduction in manpower to preform operation
- Reduction of environmental impact
- Reduction in wellhead fatigue
Temporary Suspension Head
SSD can easily be used with minor modification to a Temporary Suspension Head (TSH) for Jack-up drilling against the well head on seabed with installation of high pressure riser on top, often called safety head. This solution is used in the event of a drift of a supply vessel towards HP risers.
