Patent ID: 7674075

Claim:
A method of installing a subsea structure on a seabed, wherein the seabed is covered with particles liable to be brought into suspension in the water above the seabed, and the subsea structure being capable of being installed by a subsea robot that is driven by propulsion means, wherein the propulsion means is capable of moving the seabed water and the suspended particles around the structure, and the seabed being covered around the subsea structure; the method comprising providing a flexible protective mat including flexible impermeable ducts fastened to the protective mat; winding up the protective mat together with the flexible impermeable ducts; lowering the wound up mat toward the seabed; unwinding the protective mat by injecting a pressurized fluid into the flexible impermeable ducts in order that the mat may cover the seabed to confine the particles on said seabed.