Device and method for removing sediment

摘要

A method for removing sediment material S, which has gathered on the water floor 7 around the support structure 3 for a drilling platform 1, where a remote controlled dredging vehicle 10 is lowered down the outside of the support structure so that once on the floor the vehicle can be manoeuvred under the support structure and remove the material. The material may be discharged by means of a pump 40, arranged on the vehicle, and a line 15 to above the water surface. The vehicle may be lowered and raised with the help of a frame 13 which is hung from the platform or another relatively statically positioned body. A vehicle with propelling means which comprises at least two worm rollers 20 is also disclosed.