Flexirisers

Flexirisers


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FPSO/Flexirisers are being used worldwide for deep water crude extraction process. The operational uptime requirements are high and undergo degradation due to the impact of hostile environmental factors. This in turn reduces the product life cycle, thereby increasing accidental ecological failures that may cause damage.

Two years ago, under the EC CRAFT funding a consortium consisting of Petrobras, Wellstream, TWI, CIT, TSC Inspection Systems, Xenon, Research Centre Juelich, Naftosol and EuroNDT started developing an underwater digital radiography inspection technology, which has evolved with proof of concept, prototype construction of the solution. The results are encouraging with the confirmation that the Flexiriser Inspection technology can be applied to real world applications for safety assessment to be monitored and prompt predictive maintenance. The information captured also maps the product life cycle quality recorded for Risk Based Inspection to be deployed.

World's First Underwater Flexiriser Inspection System will do a volumetric inspection of the flexirisers to detect defects through the use of DR Browser/Flexiriser software package, which provides automatic defect detection capability. The key advantage of opting for FlexiRiser project is its ability to work in operational undersea in-situ environment under harsh and hostile conditions, thereby saving time and increasing production efficiency. The proven industrial digital radiography adapted for marine environment helps detecting defects at early stages, thereby enhancing integrity and reliability of flexible risers. The advances in digital radiography requires lesser radiation to capture a useful image and digital algorithms are built to meet acceptance criteria providing accurate results. Thus, Flexiriser stands as an attractive proposition to improve productivity, partner SME competitiveness and provide reliable tamper-proof data to enable validated acceptance criteria.

  


Currently existing methods suffer from the limitations arising due to the complex multi-layered structure of flexible risers, made from different materials such as steel, plastic and polymers, thereby having different chemical and physical properties.

Radiography has long been proven as a versatile method for carrying out NDT industrial radiography. With advances in digital technology, digital radiography has also established itself as reliable and efficient way of conducting industrial radiography. Digital advancements have now made underwater radiographic inspection a reality with equipments adapted for marine environments.

Objectives

> To improve integrity and reliability of flexible risers through volumetric inspection and defect recognition
> Prevent failure of flexible risers, thereby ensuring continued production
> Elimination/reduction of offshore leakage and oil spills resulting in service failure
> To enable safety assessment monitoring and plan predictive maintenance

FlexiRiser Under Water Trial Video


Two videos are shown below, one after the other. The first one shows the vertical movement of Flexiriser while the second one shows its rotatory movement.