NEXANS SPIDER terrain dredger system

The SPIDER system was developed for the excavation of the escarpment area on ORMEN LANGE.
The 30 degree slope required a pre dredge trench of 10 m and 4 m deep in 30 degree slope.
In the stiff to hard seabed, the SPIDER dredged these sectiion successfuly in 2005.
The terrain dredger system was based on the idea of the Menzimuck terrain forester machine,
and is classified as walking machine.
The SPIDER has proven capacity in up to 300 kPa soil, can handle boulder up to 10”,
and has an arm with reach of 6 m. It maneuvers with both use of thrusters or
by the use of the walking legs.
Further it has a fully operational VR control system,
and all operation are done in 100% VR and with no requirement of any visibility.
Size & weight
Control Container :
Workshops :
Transformer Container :
Storage container
Generators (optional) :
Umbilical winch :
SPIDER :
Hydraulic system
1 x 135 HP HPU for thrusters
1 x 75 HPU for arm and legs
8 x 17” thrusters (each 550kg)
Bollard pull
Fwd approx
Lateral
Vertical
1500 kg
500 kg
1000 kg
Arm system and ejector pumps
1 x 420 KW cutting pump
125 KW ejector pump
14” ejector
Max reach 6 m
Max vertical range (-3 to + 3 m)
Frame and lift structure
Titanium air filled structure
pressure rating 2000 m
Buoyancy for 1000 m
20´
1 x 20´
1 x 20’
20’
2 x 20’
4.4 x 3 x 2.8m,
5 x 4 x 2.5m,
7t
4t each
13t
7t
15-18t each
30t
11t
Electronic/Data
27 Gbit uplink/175 Mbaud downlink with 5 x Rs232
and 5 x Rs485/422, 6 x video and 2 x imaging sonar links,
Ethernet with 3 x 10 Mbits links Typical
16 extra Rs232 on Ethernet 1 Ghz main computer
on control system.
Control system
All data are collected on a serial to Ethernet drop down network
which gives “local” control of all sensors and valvepacks.
The lates control system technology as OPC,
distributed data collection,
touchscreens and WEB based monitoring and support tools.
The system can be fully supported throuht the internet and
low speed connections.
Realtime control system for transformer control and LARS
and umbilical winch control and monitoring.
Sensors (typical)
Six color video cameras
Mesotech 1000 sonar
Digiquarts pressure sensor
Mesotech digital altimeter
2 x Octans Fiberoptical survey gyro
Two off electrical P&T units
Linear sensors 16 off
Sediment sensor
Nexans Norway AS
Installation Services Section
P. O. Box 6450 Etterstad, N-0605 Oslo, Norway
Tel: +47 22 88 61 00. Fax: +47 22 88 63 60
www. nexans.no
post.marine@nexans.com