Description
Being critical elements in any submarine transmission system, it is important that cables and umbilicals are installed properly. Nexans has experience, knowledge and equipment to optimise safe subsea cable installation including the landfall part.
Engineering
Nexans has in-house capabilities in all aspects related to system engineering, installation engineering and equipment engineering. Our competent staff covers all aspects of the project, and key personnel follow the process from research and development, via the bid phase, through engineering and installation.
- System engineering
Geotechnical and Geotechnical assessments; Route design; In place analysis; Crossing design; Burial assessment and protection design; HDD and shore approach design. - Installation engineering
Transport and installation analysis; Seafastening design; Tool and rigging design; Procedures and task plans. - Equipment engineering
Capjet design engineering; Cable/Umbilical transport and installation equipment.
Survey and preparations
Nexans offer customised survey and preparation solutions to optimize the products life time.
- Survey
Engineering Geotechnical surveys; Engineering Geophysical surveys and interpretations; UXO surveys and UXO assesments; Pre-installation Survey; As laid and as trenched surveys; Maintenance surveys. - Preparations
Grapnel runs and target removal; Crossing installation; Shore conduit/HDD installation; Pull-in system installation.
Transport and laying
Nexans offers transport and laying of subsea cables.
- Load out from plant
- Transit
- Initiation & Completion
Float in up to 4000 – 5000 m distance; Stab & Hinge over; J-tube pull; HDD pull; Subsea pull-in/lay-down. - Installation
Static & Dynamic cable and umbilical systems down to 2000 m; Interfield and infield sections; Offshore windmill cable systems; Long step out cable and umbilical systems.
Protection and trenching
Nexans offers different protection solutions
- Capjet Trenching
- Rock-cutting
- Rockdumping
- Matress/Grout bag installations
- Composite sleeves
- Cast Iron Shells
Landfall
In order to connect the subsea cable to the power grid Nexans provide complete solutions for bringing the subsea cable to shore.
- Civil works
- Installation of landfall cables
- Termination and jointing on project sites
- Maintenance of existing cable systems
