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Installing jacket foundations with less risk, time, cost & CO2 emissions

Pioneering a new approach to the installation of jacket foundations, Napkin Innovation’s Non-Grouted Connector (NCG) lowers risk in addition to reducing installation time, costs and CO2 emissions.

By securing the jacket to pile with a mechancial connector, rather than a grouted connection, the benefits of Napkin Innovation’s NGC for jacket installation include:

Jackets installed in fewer days

By not waitng for grout to cure, the National Composite Centre calculated a time saving of up to 12 hours per 3 legged-jacket when usings Napkin Innovation’s NGC. That’s 50 days saved for every 100 jackets.

Saving up to 50 days on the installation process means you generate energy sooner while also cutting the cost of finance. Time saving calculated 2021.

Save money on foundation installation

When there’s no grout, there’s no need for a grout spread, seals, packers, back up vessels or Early Age Cycling (EAC) mitigation strategies.  Fewer vessels means a reduction in costs.  Fewer vessels also means reduced risk to Health & Safety and reduced impact on the marine environment. And when there is no grout – there is no grout to fail and no need for expensive remedial actions.

The NGC allows for a shorter stab-in guide and simplified jacket design meaning a reduction in design and fabrication costs.  A reduction in the quantity of steel required means fewer costs and reduced impact on natural resources.

Cutting the CO2 emissions linked to installing jackets

The National Composite Centre calculated a saving of up to 33% on CO2 emissions linked to installation, partly because of the reduction in vessel use but mostly because grout, a source of embodied carbon, was removed from the installation process. 

Not only will the 33% saving help achieve your carbon neutral goals, it will also offset the cost of future carbon taxes.

Jacket foundations installed with a mechanical connector

Circular Design

In addition to supporting a net zero future, and working alongside Strathcyde University’s Advanced Materials Research Laboratory (AMRL) the NGC is being designed with circularity and decommissioning in mind. With a design life of 45 years and made from steel, the NGC will be reversible, recoverable and recyclable at the end of life.

Fabrication from steel – in addition to the relatively small component size – means suitability for manufacture by in-country supply chains, resulting in support for local content and cutting down further on transportation costs and emissions.

Developed with support from Kent plc and University of Strathclyde the design is currently (January 2024) Technology Readiness Level 5.

Joint Industry Project

The Napkin team are currently engaging with a number of developers, installers and fabricators with a view to creating a joint industry project to fund and develop the technology through TRL 6 – 8. Development costs are modest and are expected to be recouped within the savings generated by less than one farm (100 turbines).

Contributors to the joint industry project will benefit from substantial savings on the future licence fee, in addition to the time, cost and CO2 savings delivered by the technology. International patents have been applied for.

Non-grouted connector timeline

If you can see the benefit in saving 50 days installation time, £14m in installation costs and reducing installation emissions by up to 33%, contact Jacqueline to discuss the joint industry project opportunity.

Capable of delivering a step change in jacket installation, the NGC offers a quicker, cheaper and greener alternative to grouted connections in support of the deployment of offshore wind on a global scale.

The Napkin Innovation technology roadmap also includes:

An improved rack chock and jacking system

Designed for failsafe jacking. Patent granted.

An improved leg design

Lighter and stronger than conventional jack-up leg designs allowing operations in deeper water without exponential rise in cost. 




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