Operation & Maintenance

Solutions for optimal and lasting cable performance - prevention, preparation and mitigation of failures

Trust NKT for expert operation and maintenance services, ensuring the longevity and peak performance of your cable networks.

Our in-house cable technicians and strict spare parts management guarantee seamless operation. With proactive repair preparedness plans and flexible service level agreements, we minimize downtime and optimize overall performance.

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Oil and Gas Cable Competence Centre

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Offshore Onshore

Service Level Agreements Repair Preparedness Plans Spare Cables Spare Accessories Inspection & Maintenance Spare Parts Management Cable Storage Adaptive Rigid Sea Joint High Voltage Testing Cable Monitoring Solutions Marine Inspections Surveys

Marine Inspections Surveys

At NKT, we have the knowledge and experience to offer and execute marine surveys for your cable assets. Our team of experts perform a 360° analysis, providing you with unparalleled cable expertise for informed decision-making.

We don’t just limit at conducting survey but also offer extended support into executing necessary remedial actions aimed at improving the resilience of your cable. Our precision in analysis and mitigation plans aims to prevent potential failures, reduce downtime, and offer up-to-date insights useful during unforeseen repair situations.

As offshore assets are placed in increasingly harsh offshore environments, subsea cables are continuously subjected to extreme conditions. This exposes them to different kinds of surface or subsurface anomalies such as structures or objects lying around the cable, anchoring or fishing gear strikes on the exposed section of the cable, mechanical faults due to free spans, etc.

To increase the reliability of offshore wind electricity production, cable failures must be prevented not only through improved cable designs, manufacturing and installation but also through continuous asset monitoring as well as proactive risk mitigation activities such as surveys.

To improve the cable's operational performance, it's highly recommended to keep track of its latest physical condition, investigate associated risks and mitigate them well in advance, before they can materialize in a failure.

Carrying out periodic cable inspection surveys helps to attain the same and ensures that the cable is well protected from potential harm. Therefore, energy could be continuously and reliably transported through the seas, by extension safeguarding the owners investment.

Assess the burial depth of the cable and determine cable exposure/free spanning or monitor existing exposures/spans
Identify traces of cable damage
Assess scour in the vicinity of the substation
Assess mobile sediment movement, sediment level changes (scour/erosion/accretion) from previous surveys and identify trends
Assess the condition of existing remedial works
Identify (potential) hazards in the vicinity of the cable or offshore substation
Monitor any previously identified sensitive habitats
Monitor any previously identified areas of archaeological interest
Inform any maintenance or remediation works required

Our overarching solution includes data acquisition through multibeam echo sounders, side scan sonars, cable trackers, visual inspection cameras and other special equipment tailored on your needs. Following the survey and the data cleansing process, our experts meticulous characterize subsurface conditions on the cable route corridor and compare them with the historic survey data to investigate changes and develop a cable-specific risk mitigation plan.

With a solid inspection schedule, early changes to the cable’s environment can be identified and failures can be prevented. Should a repair be required, up to date survey data can also prove invaluable in its execution making it an essential element of repair preparedness. Hence, an optimized inspection campaign can contribute to improving the operational performance of both the cable and connected assets.

NKT is the right partner to support with services designed to prevent, prepare for and mitigate submarine cable failures. Our portfolio of offshore cable services ranges from cable monitoring solutions and surveys through preparedness planning all the way to repair execution.