Specialised pipelay operations

Specialised pipelay operations

Specialised pipelay operations

Increasingly, oil and gas companies are prospecting and producing in areas that until recently would have been considered uneconomic or even impossible to explore. This means new challenges installing heavier, longer and deeper pipelines capable of withstanding higher pressures and carrying difficult fluids.

From routine pipeline installation to complex and specialised operations

Our scope of pipelay projects ranges from routine pipeline installation to the execution of complex and specialised operations, such as midline tie-ins, shore pull-ins, piggybacked pipelines,  installation of deepwater steel catenary risers (SCR) and a wide variety of inline subsea structures. More complex materials, both steel and coating are applied to transport increasingly aggressive oils or gasses through pipelines. Allseas has installed a wide variety of corrosion resistant alloy (CRA) cladded pipelines and specialised insulation coatings such as injection moulded propylene (IMPP).

On the Gorgon Jansz project in Australia, Allseas installed three pipelines, including a 30 inch diameter line over a 700 m escarpment, essentially an underwater cliff, with the highest quality welding criteria ever produced offshore.

Read more about pipeline design and engineeringpipeline installationpipeline protectionsubsea installation and survey and subsea operations.
Learn more about Allseas’ activitiesprojects and equipment.

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Our team of highly skilled engineers provide complete design solutions for some of the most challenging pipeline systems in the world, both in-house and by managing subcontracts with specialised
Pipeline installation Allseas has installed over 20,000 km of subsea pipeline worldwide using  S-lay technology, with diameters ranging from 2” to 48”. S-lay is characterised by
Pipeline protection In most parts of the world where oil and gas production takes place, there are many existing pipelines and cables on the seabed that must be crossed when installing a new
Subsea installation The offshore industry is experiencing a continuous move into deeper waters, more remote and hostile environments and more complex field developments. This trend presents new
Survey and subsea operations Allseas has a comprehensive range of vessel-based remotely operated vehicles (ROVs) and survey equipment utilising the latest high-specification sensors and equipment.
Installation Offshore installation varies with the type of development involved. Fixed platforms have the most work involved; jackets and topside decks need to be transported to the well location.
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Fabrication Our fabrication unit employs more than 200 people and provides a variety of activities in support of Allseas’ offshore operations. Custom-made subsea structures such as pipeline
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Production technologies. Full service. Our integrated production chemical technologies and services provide tangible benefits and assurance to oil and gas operations worldwide, regardless of
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