The invention provides a floating windmill, comprising a floating element and a wind turbine. The floating windmill is distinguished in that it further comprises: a tension leg, an anchoring, a buoyancy element, a swivel and a cross bar, wherein the swivel is arranged in the buoyancy element. In operation, the floating windmill in operation is configured with the wind turbine in an upper end of the floating element extending up above the sea level, with a lower end or part of the floating element submerged in the sea, with the cross bar in one end connected to the lower part or end of the floating element and in the opposite end connected to the buoyancy element, with the buoyancy element fully submerged, preferably at safe draught depth below surface for service vessels and/or marine transport ships, with the tension leg arranged between the buoyancy element and the anchoring on the seabed. The floating windmill configured with the wind turbine in the upper end can weathervane freely around the buoyancy element, wherein in a low force condition when the forces by ocean current, wind and waves are low the floating element, the buoyancy element and the tension leg is oriented in substance in vertical direction and the cross bar is oriented in substance in horizontal direction, wherein in a high force condition when the forces by ocean current, wind and waves are high the shape of the floating element, cross bar, buoyancy element and tension leg is stretched by the forces to provide a shape like a lazy-s configuration, which change in shape and dynamic behavior reduce extreme stress levels.

A ring-wing floating platform is disclosed. The ring-wing floating platform includes a floating hull, a top of the floating hull being above a sea surface and its geometry at a water plane is centrally symmetric, a ring-wing surrounding a perimeter of a bottom of the floating hull with a horizontal projection of concentric annular geometries, a positioning system located at the bottom of the floating hull, and a topsides located above the floating hull and connected to the floating hull by deck legs or installed directly on the top of the floating hull. The axes of the ring-wing and the floating hull are collinear, and their bottoms are in a same horizontal plane. The ring-wing and the floating hull are connected together as a unitary structure by multiple connecting components with an annular gap in-between.

A ring-wing floating platform is disclosed. The ring-wing floating platform includes a floating hull, a top of the floating hull being above a sea surface and its geometry at a water plane is centrally symmetric, a ring-wing surrounding a perimeter of a bottom of the floating hull with a horizontal projection of concentric annular geometries, a positioning system located at the bottom of the floating hull, and a topsides located above the floating hull and connected to the floating hull by deck legs or installed directly on the top of the floating hull. The axes of the ring-wing and the floating hull are collinear, and their bottoms are in a same horizontal plane. The ring-wing and the floating hull are connected together as a unitary structure by multiple connecting components with an annular gap in-between.

Systems and methods of restoring a lake including dredging, island creation, water treatment, real estate development, computer modeling of environmental conditions, wave height reduction, sediment removal and encapsulation, bathymetry contouring, littoral zone restoration, plant restoration, and/or fish restoration.

Systems and methods of restoring a lake including dredging, island creation, water treatment, real estate development, computer modeling of environmental conditions, wave height reduction, sediment removal and encapsulation, bathymetry contouring, littoral zone restoration, plant restoration, and/or fish restoration.

A method has the following steps: a) providing an undersea foundation arranged on the bed of a body of water; b) laying a section of pipe and of an in-line structure on the foundation and allowing the section of pipe to freely self-orient on the foundation; c) placing at least one guide on the foundation on both sides of the section of pipe; d) blocking the guide on the foundation to laterally clamp the section of pipe with respect to the foundation, while authorizing a longitudinal movement of the section of pipe with respect to the guide.

A method has the following steps: a) providing an undersea foundation arranged on the bed of a body of water; b) laying a section of pipe and of an in-line structure on the foundation and allowing the section of pipe to freely self-orient on the foundation; c) placing at least one guide on the foundation on both sides of the section of pipe; d) blocking the guide on the foundation to laterally clamp the section of pipe with respect to the foundation, while authorizing a longitudinal movement of the section of pipe with respect to the guide.

A device is for securing a connection to be formed between a leg of a marine structure and a pile of a fundament fastened in a seabed. The connection has the leg partly inserted into an opening of the pile. The device is configured to be firmly connected to the leg. The device comprises a sleeve element configured, together with the leg of the marine structure, to be brought to vicinity of an upper portion of the pile. The device further has a clamping arrangement attached to the sleeve element comprising at least one clamping device configured to form an attachment between the sleeve element and the upper portion of the pile.

A hybrid offshore wind turbine includes a monopile, friction wheel, and suction bucket.

A method of installing a foundation (1) for a structure. The foundation body (2) has a toe (7) at its distal end which defines an aperture into an internal cavity (12) defined by an inner wall (8). Fluid is jetted from a plurality of nozzles (9) to direct fluid distally into the soil (5) ahead of the toe (7) during installation. A pump arrangement (13) controlled by a controller (16) is used to vary the quantity of fluid at a proximal end to thereby vary the fluid suspension pressure adjacent the toe (7) in a fluid communication channel (11) extending between the proximal end and the toe (7). The controller varies the fluid suspension pressure as the toe (7) inserts deeper into the soil (5) based on a target fluid suspension pressure as a function of toe depth.