High efficiency, no depth limitation  Subsea Dredge

Subsea excavation and sediment disposal

The GTO Subsea Dredge is remotely operated dredging system for subsea excavation and efficient removal of subsea gravel and sediments up to 230 mm.

The dredging system can be utilized for excavating underground pipelines, salvage and other similar offshore applications where large amounts of soil removal is required.

Easy to use subsea dredge

The system requires very little ship deck space and sea fastening. The Subsea Dredge is packed in a single container, prepared for air freight and has a short lead time for deliveries around the world.

Electrically powered and highly efficient

The dredge is electrically powered and drives a high-flow, low pressure seawater pump through a venturi system. It runs with an effect of 235 kW and has been equipped with ejector based-dredge system from 8-16”. The system can also be equipped with water jetting on the suction head if disintegration og hard materials is required.

Remotely controlled and maneuvered

A work-class ROV accompanies the dredge system and manipulates the dredge pick-up.

 

Subsea dregde operation

General Technical Specifications

Manufacturer

Depth Rating

Deployment

GTO Subsea

3000 msw

Client supplied vessel crane

Model

Seastate

Power supply

GTO XL

Max 3.5 m

440VAC/60 HZ/ 3 Phase

2x250A for dredge

1×125 for winch

220VAC/3 phase 16Amp for workshop

 

Size & weight

Dredge Unit 

Control container

Workshop container

Umbilical Winch

Umbilical chute

2,4 x 2,4 x 2,4 m

6,1 x 2,4 x 2,6 m

3, x 2,4 x 2,6 m

4,0 x 2,0 x 3,0 m

2,6 x 0,4 x 2,0 m

Weight

WEIGHT

weight

Weight

weight 

4,5 t

10 t

5 t

15 t

1 t

Subsea dredge capacities

Ejector size

Removal capacity

Suction hose id

recommended rock size

back flush

water jet on nozzle

Std Suction hose length

std discharge hose length

8”

60-120 T/HR

200 mm

3 ”

YES

OPTION

20 m

10 m

10”

60-120 t/hr

250mm

4 ”

YES

OPTION

20 m

10 m

12”

120-240 T/HR

300 mm

5 ”

YES

OPTION

20 m

10 m

14”

130-260 t/hr

350 mm

6 ”

YES

OPTION

20 m

10 m