Scope Brief

Jacket legs on offshore platforms often contain complex internal structures such as pipework, access hatches and internal steelwork. These features restrict access and visibility, making internal condition assessment challenging. External scanning was not possible due to grouted sleeves, and previous inspection attempts offered limited coverage. The aim was to confirm internal condition, remove scale for accurate NDT and provide quantitative evidence for asset planning.

The Challenge

The client required a proven robotic solution to enter the structure, clean internal surfaces and gather reliable visual and ultrasonic wall thickness data.

• Small inspection hatch entry into jacket leg.

• Internal obstructions & pipework.

• Heavy corrosion on internal surface.

• Need for quantitative internal data

The Solution

Innovair deployed Magni™, a bespoke magnetic crawler designed for internal cleaning, close visual inspection and ultrasonic corrosion mapping.

The system provided:

• Rope access deployment

• Entry via a 150 x 200mm inspection hatch.

• Magnetic adhesion for internal steel surfaces

• High pressure cleaning attachment to remove scale

• HD Camera / Corrosion Mapping

The Results

• Internal cleaning across accessible length

• Clear visual confirmation of internal condition and layout

• Scale removal enabling UT Corrosion Mapping 

Magni enabled effective internal jacket leg inspection where access was previously constrained. Combined cleaning, visual inspection and UT mapping delivered the quantitative evidence required for asset integrity and future planning.

Want more information?

Download the full case study to learn more about Magni™ and our Advanced NDT service offering for offshore structures.