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Mini CPT punches above its weight

OFFSHORE SITE investigation contractor Andrews Survey's new Datem Neptune 3000 miniature CPT can penetrate 15m into the seabed from a unit only 2m high.

The firm says the compact design makes it easy to airfreight the unit anywhere in the world.

Space is saved because the 2cm 2cone is attached to 16.5m of coiled pushrod on a drum. The cone is pushed at a constant 2cm/s by an applied force of up to 1,000kg. The system is controlled in real-time from the surface using specially developed digital cone technology and software.

With a base area of less than 4m 2, Datem can be deployed from relatively small vessels, small jackups or from jetties. Andrews has also mounted the unit inside a stronger frame for heavy-duty work, while retaining the overall coiled rod weight and size advantages.

The system is suitable for a range of marine civil engineering work, including pre- and post-dredge surveys, foundation studies, and coastal site investigation. It is also suitable for offshore windfarm, cable and pipeline route investigations.

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