+ What is Cable Protection?

‘Cable Protection’ is a collective term used within both the Oil & Gas and Offshore Renewable industries as a means for protecting subsea cables and SURF products from external mechanical forces whether in dynamic and/or static environments. In its roughest form, the terminology ‘cable protection’ covers many solutions including cable burial, rock dumping, mattressing, split-pipe, buoyancy, bend restrictors, Cable Project Systems to name only a few.

+ Why is Cable Protection necessary?

It is well known that having exposed cables within a subsea environment is not good practice based on the rate of cable failures from either environmental conditions or accidental loads. Burrying cables is seen as the most effective means of protection for the majority of a subsea cables length, however its common for these cables to transition out of burial and connect to an offshore asset and/or shore landing. These ‘exposed’ elements require protection.

+ Why protect Cables & SURF Products?

Like a vein in your body, cable & SURF products provide a vital connection between assets and/or subsea minerals. If this vital connection is damaged in any way then the environmental and financial impact can be unprecedented. Cable Protection is understood to be the most appropriate way of de-risking potential failures and there are many case studies were damage to these vital connections have occurred due to the fact adequate Cable Protection was not deployed

+ Cable Protection within the O&G & Renewables markets?

The O&G industry has used Cable Protection & SURF Protection for many years and consider them a critical interface to protect subsea assets, this is coupled with exceptional quality standards such as API, for which these products must comply with. The offshore renewables market predominantly focuses on Cable Protection Systems due to the nature of the projects, however the principles remain the same as O&G. As the renewables market is still somewhat in its infancy there are no defined standards to which products must comply with.

+ What are Cable Protection Systems?

As noted within DNV-RP-J301, Collective term for protective tubular elements which can be fitted onto a cable for mechanical protection to ensure that the cable can operate for its service life.

+ Why are Tekmar market leaders in Cable Protection Systems?

With over 30years heritage in the O&G and offshore renewables market Tekmar have considerable experience with supplying Cable & SURF protection to many world leading clients. Within the offshore renewables market, Tekmar have supplied its patented TekLink Mechanical Latch CPS on over 52no projects, protecting assets worth billions. Tekmar are a dynamic and flexible company that can offer clients confidents whom wish to procure offshore products with exceptional levels of quality and performance. Tekmar pride themselves on offering a ‘turnkey solution’ which includes working on FEED studies, undertaking design and manufacturing in-house and offering offshore support with all project team members offshore trained. Please see our track record.

+ Tekmar’s Track Records

Tekmar have worked with many world leading organisations and have directly supplied all levels of the supply chain – developers, installers, cable manufacturers, please see our track record. Tekmar consider this a reflection of their ability to understand client needs and working closely with all stakeholders to ensure project are delivered on time, and on budget to exceptional levels of quality.

The TekLink Mechanical Latch CPS has been supplied on over 52no OWF projects and was developed based on 30years of O&G heritage. It comprises of a number of common O&G products including ‘Stiffeners’ for damping movement, ‘Bend Restrictors’ for offering lock-out protection and ‘Split-Pipe’ for ballast and stability. It is Tekmars belief an effective CPS requires all three of these technologies to offer effective subsea protection.

TekLink has been design to remain flexible and versatile whilst protecting the majority of the industries subsea cable solutions. The patented mechanical latch interface for both monopiles (j-tubeless) and j-tubes protects subsea cables from the ‘hang-off’ deck, through the asset, transition through the free-span, along the seabed and/or scour protection and into burial. The TekLink is designed not to clamp to the subsea cable thus requiring no maintenance over its life time whilst also allowing easy cable replacement if required. Not clamping to the subsea cable allows easier offshore installation for 2nd end methodologies.

+ Why Interface into both J-tube less and J-tube assets?

Most offshore wind farms now utilise both monopiles (j-tube less) and j-tube (OSS Jacket) interfaces therefore the TekLink CPS has been designed to interface into both. Tekmar also supply ancillary products such as bellmouths to offer a engineering connection. In 2007 Tekmar worked with a lead-in OWF developer who wanted to remove the external j-tubes from their monopiles, this was a huge success and saved the client £millions in costs and this led to the introduction of the j-tube less monopole to the indsutry.

+ Does using a Cable Protection System slow down cable installation?

No. The most common way of install the TekLink CPS is in conjunction with the subsea cable installation therefore it should not add any additional time to critical path activities. The TekLink CPS is also designed for pre-installation, without the subsea cable, if this installation methodology is considered effective for the project.

+ Aren’t all CPS’s standard?

To date Tekmar have supplied products to over 52no OWF projects and everyone has been bespoke. The design and configuration of the CPS is influenced by many factors including environmental conditions, cable properties, interface details etc, therefore each project is considered unique. Each project undergos a comprehensive design & engineering analysis using complex computer simulations and for this Tekmar subcontract AgileTEK. AgileTEK are a leading subsea analysis organisation who have an DNV accredited methodology for analysis subsea cables within offshore environments.

+ What about areas such as VIV, Thermal Performance, Free hanging cable vibration?

Tekmar are currently supplying their 6th generation product with the 7th generation improvements being introduced Q2 2016. Tekmar maintains a continuous development programme to integrate lessons learnt & feedback from all projects. Key research and development areas to date have included items such as VIV, fatigue analysis, thermal performance, to name only a few. 2015 saw Tekmar invest heavily in a 12month thermal test programme which included live scale testing of various environmental conditions to demonstrate there is no detrimental affect of installing a CPS around a subsea cable. This was completed in conjunction with a leading OWF developer, for further information on these incentives please contact Tekmar.

+ So why buy any Cable Protection?

History shows cables and SURF products are prone to failure unless a suitable method of protection is utilised. The cost of any failure can be horrendous versus the cost of a suitable cable protection system and industries such as O&G would never consider deploying assets without suitable protection. To discuss available options please contact Tekmar.