Stationmar has started detail design of their new concept called Sakayan. The Sakayan is a three-column assymmetric
semi-submersible platform. The name as a Philippino fishing boat with two outriggers for stabilization.
The Sakayan concept is by one main column carrying the WTG assembly and two outriggers with smaller colums.
All columns are fitted with the company’s under development ENPAC HMN system, which stands for energy neutral
predictive advanced control heave motion neutralization.
The system shall neutralize both heave motion and pitch and roll.
In addition to the above mentioned blasting features the following to be listed:
Minimized motion dynamics extends lifetime and up-time for the WTG
Floats fully outfitted with very shallow draft
No heavy offshore crane operations
Saves mooring costs
Simplified entrance for service personnel
Can be retrieved and towed to yard for heavy overhaul of the WTG
15 MW WTG carried by Sakayan 15 in front of Odderøya with peak 92 m asl.
Operational draft is 26,3 m.
Taut line moored with preset embedded anchors.
FLOATING WIND POWER AT SHALLOW AND DEEP WATERS
Offshore wind is today on an upward trend as more and more entities see the benefit of setting out wind turbines out at sea. The sea offers steady winds, but at the same time also continues wave heave. This unwanted heaving can over time cause more stress on the blades and nacelle of the wind turbine resulting in higher maintenance frequencies and shorter life spans.
-> Floating wind power at shallow waters (20m - 100m)
Fully outfitted deployment from yard
Eliminate expensive offshore operations
Stationmar is developing a range of structure concepts to compensate for the numerous issues related to shallow water foundations. All of our structures are non-piling where we instead rely on suction caisson design. This allows for floating both out and in if needed for maintenance. This again will eliminate the need for large purpose-built cranes and surface vessels on standby. Suction caissons have been used in the offshore industry successfully for more than 30 years.
WindJACK Patent pending
Floating structure with sea-bed fixed foundation
Releasable quick connections for periodic maintenance
WindBUOY Deployment Patent pending
Simplicity of spar buoy without costly offshore operations
WindSTAR Patent pending
Preset suction anchors
Two-level pre-tensioned taut mooring
-> Floating wind power at deep waters (100m and beyond)
Shallow water construction
Deep water deployment
Telescopic wind turbine foundation
Stationmar has developed a telescopic wind turbine foundation (Patent Pending).
This is a Telescopic Spar Buoy that allows to be loaded at a quay side with only 30 meters water depth. We call this telescopic Spar Buoy “Floating Wind Station (FWS). The FWS will after deployment be telescoped down to 100-meter water depth.
We have also developed a Dual Service and Support Vessel (DSSV) that can load and transport two sets of (12MW) complete wind turbines and its foundations onto the operational field and install them to operational draft. All is done with no vertical movement to either the FWS or the DSSV. The two entities operate as one unit.
Both the FWS and the DSSV are fitted with Wave Motion Neutralization technology.
OIL AND GAS
Oil and gas semi-submersible rigs
Remove the need for costly heave compensation on deck
A drilling rig without any heave (vertical) movement from waves may be taut moored using fiber ropes.
The list of benefits with this new technology is long.
StationMar Semi Submersible redefined
For drilling operations, you don't need a sub-sea BOP. A smaller and lighter dry BOP placed on-board the rig saves time and money. A simpler mooring system that is faster and cheaper to lay out. No need for heave compensation equipment that are heavy and costs a lot of money. No need for slip-joint and marine riser.
For work-over rigs that perform light or heavy interventions the benefits are many. In rough sea areas you may extend the operational window from today being 3-4 months of the year to a year round operation. That alone represents enormous savings for the oil company as well as the contractor. The safety of the rig will also be increased when helicopters may land in any type of weather condition due to the fact that the rig is not moving.
For a Dynamically Position semi-submersible rig with no mooring we have a special system built into the rig that allows the Dynamically Position rig not only to be horizontally kept in place, but also be vertically kept in place due to the Heave Neutralization system. This will be very beneficial for deep water drilling and interventions. As the rig will be kept in place in a 3D perspective. This has never been done before.
FLOATING SEABED MINING
Extraction of seabed minerals
The extraction of minerals from the seabed is a tremendous future opportunity. Large areas of the seabed have not yet been mapped, and there is now a lack of many minerals that have previously been found with traditional mining. Large amounts of cobalt, copper, manganese, silver, gold and zinc are found under the seabed. A stable and completely rigid platform is needed to extract these valuable minerals.
Floating cities can solve space shortages and climate crises. Such cities are now planned in several locations around the world. The "zero heave" technology means cities are as stable as on land since there are no vertical movements. The city is anchored with fiber rope and becomes completely rigid in the horizontal direction.
Floating bridges and submersed tunnels
Stationary beams provide stable bridges and tunnels since the system holds a fixed vertical position.
The structures are cost saving since all dynamics are reduced.
Offshore waver power generation
Power generation by the means of exploiting the continuous heave is a field that has been studied and developed and prototyped for years. Our technology should help to open up new avenues of interest due to its ability to cancel out the wave heave impact on structure. This will allow different technologies to use said structure to again take out the power of the waves in a multitude of ways.