NEXANS SPIDER terrain dredger system
Installation Services Section
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 :
20´ 1 x 20´ 1 x 20’ 20’ 2 x 20’ 4.4 x 3 x 2.8m, 5 x 4 x 2.5m,
Hydraulic system
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.
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 1500 kg Lateral 500 kg Vertical 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)
7t 4t each 13t 7t 15-18t each 30t 11t
Electronic/Data
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
Frame and lift structure
Titanium air filled structure pressure rating 2000 m Buoyancy for 1000 m
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
[email protected]