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.
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
* Depends on sediments and operational conditions
