What we do

Cable repair & installation

One-stop-shop subsea power cable solutions

Tailored repair and installation solutions for subsea power cables

We provide our customers with tailored cable repair solutions for both HVAC and HVDC subsea cables. N-Sea also offers one-stop-shop subsea power cable transport & installation (T&I) and engineering, procurement, construction and installation (EPCI) solutions.

Offshore energy developers, operators and cable manufacturers are often faced with numerous interfaces during subsea power cable repair or installation projects, which can result in longer project lead times and increased costs. N-Sea delivers tailored, one-stop-shop subsea power cable solutions with maximum efficiency and minimal risk. We have a proven track record in subsea power cable repair & installation projects in shallow water and landfall operations.

ACTIVITIES

N-Sea’s cable repair & installation activities

Delivering smart and efficient ‘fit-for-purpose’ subsea power cable solutions for our customers:

Customer-specific tailored subsea power cable repair frameworks

Pre-emptive engineering of potential repair scenarios
Guaranteed mobilisation and repair response times
Fault finding and pinpointing, HV management and jointing (OEM or universal)
In-house diving, ROV, survey and route clearance capabilities

In-house subsea power cable T&I and EPCI

Engineering and analyses
Survey and route preparation and clearance
Transport and installation, including burial, termination and testing
Repairs and maintenance, including data management, repair preparedness, asset monitoring and fault finding

VESSELS & EQUIPMENT

Cable lay vessels and specialised equipment

We deliver our ‘fit-for-purpose’ subsea power cable solutions with a team of experienced professionals, supported by unique, fully mobilised cable lay vessels and bespoke, in-house developed modular cable installation equipment:

Curo

Shallow-draft, highly versatile cable lay vessel with carousel suitable for HVDC, capable of executing a wide range of subsea power cable repair and installation projects on DP2 or anchors

Altera

Shallow-draft, highly versatile cable lay vessel with 4500t carousel, capable of executing a wide range of subsea power cable repair and installation projects on DP2 or anchors

Modular cable installation equipment

In-house designed system, developed to maintain cable integrity and providing the flexibility to handle all types of HVAC and HVDC cables and joints from wide range of vessels and anchored barges

All vessels & equipment

PROJECT HIGHLIGHT

Gwynt-y-Môr: Smart subsea cable repair solution for OFTO

All projects

2022 – 2025

Gwynt-y-Môr offshore wind farm export cable repairs

Irish Sea, UK

View project

Bespoke solutions to replace faulty cable sections including reduction of outage duration

N-Sea deployed the Curo alongside external plant and equipment to deliver optimal project outcomes

Project executed within OFGEM budget and schedule constraints

HOW WE OPERATE

Project management

Our dedicated team of experienced professionals combines deep industry knowledge with a broad range of engineering, repair & installation capabilities, supported by strong project management and in-house support functions. Our project management team ensures:

Scheduling

Developing detailed schedules that integrate each project phase, from initial engineering through to final installation

Engineering

Developing best-for-project solutions from early involvement through to project execution

Operational management

Coordination of offshore operations to ensure safe and efficient execution

Logistical coordination

Management the complex logistics of vessels, materials, equipment and personnel (including VISA compliance and local content requirements) ensuring the availability of all resources at the right place and at the right time

Data management

Next Bricks