OceanTech has been awarded a Subsea Research Project ''ANDWIS'' (Automated Non Destructive Weld Inspection Robot) within the Petromax 2 pragramme!

Inspection Robot!
Project Manager Geir Ingar Bjørnsen explain the new Robot to be a game-changer in detecting fatique cracks in Jacket Structures subsea and in the Splash Zone.

The major challenges in the Splash Zone for such inspections are the forces from the current and waves, as well as the complex geometry to follow. Divers has a huge HSE challenge working in this zone, and ROV’s has major challenges in positioning due to the movements. Different types of crawlers has also problems with the positioning and beeing able to do efficient inspection in this zone.

To solve these challenges, OceanTech has developed a robot prototype which holds on to the structure and can move along the welds to be inspected. The research project will develope brand new technology to make the controll more easy, and with new sensoring to make the robot autonomous.

Inspection Robot also for Subsea use

In addition to beeing able to do efficient inspection in the Splash Zone, the robot can be used at deeper water and beeing deployed by ROV’s. The Robot will be conected to the ROV’s controll system and powered from the ROV.

It is also likely that the ANDWIS robot can bring other sensors and NDE equipment like wall thickness measurements, CP or FMD inspection.

Prototype design

OceanTech Vertical Access Tool (VAT) will deploy the new system in the Splash Zone

Many of the older offshore installations have major issues related to corrosion and structural damages, especially in the Splash Zone (+5 to -10 meters). There are cases where Jacket Structures have large crack’s, which can be critical for the structure integrity. Most oil-companies are today choosing to inspect and monitor these structures (which is very costly) or to repair it using different kinds of clamping solutions.

In cases with Life Time Extension, such inspections are also an important as input to the calculation related to remaining lifetime.

OceanTech has since 2007 developed robotized access tools for operations in the Splash Zone on offshore installations. This work was started under Linjebygg Offshore, where the Splash-Zone division was bought by OceanTech in 2017. By utilizing robust and flexible access tools, OceanTech has successfully completed mechanical work, inspections and maintenance that require a high degree of precision.


OceanTech was established in 2017 through a buyout of a department in Linjebygg. The company is located at Nyhavna in Trondheim. OTAS has more than ten years of experience with specialized horizontal and vertical access tools for work in the splash-zone on oil platforms. With their 5000 m2 space including Dora 2, they have the possibility to make full scale tests, also under water, of access tools, robotization equipment and software.