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Offshore dræg – Detrenching Grapnel

Drain / Detrenching Grapnel for seawater cable removal

Our engineering and production department has completed numerous individual projects where customers have requested the Dragging/Detrenching Grapnel. KAMI has carried out various projects on unique and specific drums where we have carried out the design work and FEM calculations based on customer proposals. In addition to the engineering part, we have produced the steel structure in high-strength steel, and we have been responsible for the surface treatment and any testing of the equipment.

A Grapnel – also known as a Detrenching Grapnel – is used to retrieve seawater cables from the seabed when they have been breached. The equipment is deployed via a ship and travels across the seabed, and once the equipment grabs the cable via the tine itself, the cable can be pulled up from the seabed.

This page shows the execution of a specific project – from engineering to final delivery. The size and shape of the individual drain varies depending on the project, so please contact us if you would like more information about the different options.


  • Design of Drainage / Detrenching Grapnel according to customer specifications
  • Preparation of FEM calculations
  • Preparation of the production basis
  • Identification of relevant spare parts
  • Creation of a manual
  • Preparation of quality documentation.


  • KAMI has produced all the steel parts.
  • Processes include cutting, CNC machining, bending/rolling, welding and assembly.
  • Made of high-strength steel
  • Possible final test – simulated in a real-life environment
  • Varying surface treatment according to the customer’s instructions.


  • The different Drægs have been delivered to several Danish customers.
  • These have been exciting projects where we have been involved from the initial phase to final delivery, including any final testing.

We work within Industry, Offshore & Marine, and Structural Steel

We deliver everything from small welded structures to large structures!
We also deliver small CNC machined parts – and nothing is too small!

Engineering and project delivery

We offer design, FEM calculation and CE marking


Stainless steel and aluminum production

We offer sub-processes or complete designs


Production in mild steel and high-strength steel

We deliver everything in sheet metal, welding and machine work


Want to learn more about this project?

Feel free to contact us!

We carry out various projects in stainless steel, aluminum, black steel and high-strength steel. In addition to projects for the offshore & marine industry, we deliver projects for industry, including projects for the food industry.

If you want more information about different projects we have delivered to the industry, you will find relevant information here. To see other projects we have delivered to the offshore & marine industry, find more info here.

In addition to project delivery, we also provide sub-processes for the metal industry. If you want more information about some of the services we offer, such as cutting, bending/rolling, CNC machining, welding or assembly, you can find info here. In addition to production, we also provide engineering services, such as design proposals, production documentation as well as FEM calculations and CE marking. You can read more about our engineering services here.

Feel free to contact us – we will do our best to help you!

Contact us to find out what we can do for you