Flowline, umbilical & riser installation


Ashtead Technology have an extensive array of packaged solutions covering a range of flowline, umbilical & riser applications.

We have the capability to design and develop sensor packages for maximum performance throughout the installation phase.

We can optimise productivity by monitoring the installation, burial and as-installed survey stages of the product, including sensors, data acquisition, recording and visualisation of data sets.

The installation of flowlines, umbilicals and risers is a key aspect of subsea construction and whilst driving efficiency is critical to manage cost, the operations require careful monitoring throughout the installation process. This ensures the installation is conducted within the design parameters, with no environmental impact.

Integrated solutions


Discover how Ashtead Technology incorporates market-leading technologies and innovative life of field services to help clients deliver complex projects.

With an in-depth understanding of flowline and umbilical installation issues, Ashtead Technology has the expertise to provide a complete solution to many installation, verification and operational needs.

The installation of flowlines and umbilicals is a high-risk operation. Driving productivity through increased installation speed and reduced vessel time is required to minimise any cost over-runs.

Knowledge of multiple aspects of the installation process is required to identify and manage the location, catenary shape, touchdown point, tension, burial depth and visual confirmation of status. In addition, the monitoring of trenching and burial equipment is a vital part of flowline and umbilical installation.

With an in-depth understanding of riser installation issues, Ashtead Technology has the expertise to provide a complete solution to many installation, verification and operational needs.

The installation of risers is a high-risk operation. Driving productivity through increased installation speed and reduced vessel time is required to minimise any cost over-runs.

Knowledge of multiple aspects of the installation process is required to identify and manage the location, catenary shape, touchdown point, tension, burial depth and visual confirmation of status. In addition, the monitoring of trenching and burial equipment is a vital part of flowline and umbilical installation.

Using advanced technologies and specialist capabilities, we can provide riser monitoring and inspection solutions to record the attitude, shape and condition of subsea risers throughout the installation, pre-commissioning and operating stages of critical assets. This allows us to deliver precise data and ensure quality assurance throughout the life of the asset, reducing downtime and potential environmental risks.

Riser installation requires a high degree of care to ensure damage is not incurred during the deployment and hook-up phases. This requires advanced monitoring of subsea operations and subsequent inspections.

Ashtead Technology can confidently develop and deliver integrated survey systems to support the acquisition of as-installed survey records, delivering performance through reduced survey time, whilst delivering high quality data.

An essential task in subsea flowline, umbilical and riser installations is to perform a verification survey to confirm that the product has been installed correctly in accordance with industry specifications.

Gathering this information requires multiple sensors in order to form a complete picture of an asset, an exercise which can be time consuming and costly. Increased productivity can be achieved through the speed of data acquisition and real-time monitoring, allowing for remedial work to be actioned more efficiently, avoiding re-mobilisation and significant installation costs.

Underwater Cutting Solutions (UCS) designs and engineers an extensive array of subsea and topside cutting solutions, suitable for use on caissons, pipelines, tubulars and jackets of various sizes.

The comprehensive range of UCS cutting systems includes diamond wire and dual cut bandsaws, chop saws, hydraulic shears, and abrasive waterjet cutting systems. These can be configured for diver or ROV-deployed use, as many clients move away from traditional methods of diver installation in favour of remote operations.

UCS delivers user-friendly, high performance cutting systems which can be bespoke-engineered to your exact project requirements. International technical support and operational capability is available from highly-experienced and trained UCS technicians.

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As assets age and deteriorate over time, it may be necessary to remove their protective coatings to assess their condition from a SA2.5/HB2.5 state, allowing the installation of repair clamps or for other works to be carried out. This requirement is becoming increasingly commonplace as structures around the world begin to reach the end of their working lives.

Thanks to their R&D-driven approach, UCS is experienced in providing high-performance coating solutions and experienced technicians to remove concrete weight coat, bitumen, FBE, epoxy and other coatings without damage to the asset.

UCS carefully applies knowhow and technical performance to ensure that coating removal is effective and asset downtime is minimised.

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