Machinery


DREDGERS

Non Self-Propelled Cutter Suction Dredger
Size:  116mX21mX5.3m
Suction Pipe Diameter:  1.2m
Mud Pipes:  1.1m
Total Device Power:  22209kw
Transmission distance:  6000m

Dredging equipment can be divided in Mechanical Dredgers and Hydraulic Dredgers. The differences between these two types are the way that the soil is excavated; either mechanical or hydraulic.

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Hydraulic digging make use of the erosive working of a water flow. For instance, a water flow generated by a dredge pump is lead via suction mouth over a sand bed. The flow will erode the sand bed and forms a sand-water mixture before it enters the suction pipe. Hydraulic digging is mostly done with special water jets on soils such as silt, sand and gravel.

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Mechanical digging by knives, teeth or cutting edges of dredging equipment is applied to cohesive soils.

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Self-Elevating Platforms

Pile-driving, hook work, foundation-drilling and many other marine construction operations are put on a solid footing through the use of Self-Elevating Platforms (SEPs).

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Highly-portable, these modular “jack-up” barges provide stable work platforms which effectively eliminate construction downtime due to waves, current and tidal action.

SEPs can operate in land-locked or shallow water areas that are inaccessible to conventional jack-up platforms.

 

Deepsea Harvesting Vessels

There are two predominant forms of mineral extraction being considered for full scale operations: continuous-line bucket system (CLB) and the hydraulic suction system. The CLB system is the preferred method of nodule collection. It operates much like a conveyor-belt, running from the sea floor to the surface of the ocean where a ship or mining platform extracts the desired minerals, and returns the tailings to the ocean.

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Hydraulic suction mining lowers a pipe to the seafloor which transfers nodules up to the mining ship. Another pipe from the ship to the seafloor returns the tailings to the area of the mining site.

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