A device for levelling an offshore foundation construction including a cylinder equipped with a fastening member for removably fastening the cylinder to a part of the offshore foundation construction, a rod mobile in axial translation with respect to the cylinder, the rod including a pushing end so configured to push against a mudmat.

Marine habitation units are disclosed for use in the open sea. Each unit includes a habitable chamber; a column including a first end, and a second end, opposite the first end, the second end for mounting in a sea bed; and, and, a segment in communication with the habitable chamber, and the first end of the column. The segment is moveable both substantially vertically, and, rotatably, allowing the wherein the habitable chamber and the column to move substantially vertically, and, rotatably, with respect to each other.

Marine habitation units are disclosed for use in the open sea. Each unit includes a habitable chamber; a column including a first end, and a second end, opposite the first end, the second end for mounting in a sea bed; and, and, a segment in communication with the habitable chamber, and the first end of the column. The segment is moveable both substantially vertically, and, rotatably, allowing the wherein the habitable chamber and the column to move substantially vertically, and, rotatably, with respect to each other.

A pile driving method for driving a pile, e.g. a hollow and open ended pile, e.g. a large diameter pile having an outer diameter of at least 5 meters, e.g. a monopile of an offshore wind turbine, into the soil, e.g. into the seabed. Use is made of a pile driving system which comprises a drive head member that is configured to engage the pile, and a solid mass drop weight assembly comprising a support structure and comprising solid drop weight elements supported by said support structure, preferably solid steel drop weight elements being composed of steel elements, e.g. stackable steel elements, which drop weight elements have a total mass of at least 100 tonnes, e.g. more than 500 tonnes, e.g. more than 1000 tonnes, e.g. more than 2000 tonnes, which drop weight assembly is vertically mobile relative to, e.g. above, the drive head member. Further use is made of a lift system that is configured to bring the drop weight assembly into an initial height position relative to the drive head, and a quick release system adapted to effect quick release

Systems and method for compensation of motions of a floating structure, which includes a lifting system with a working platform supported by its actuators driven along vertical axis, where the foremost and the aft-most units are paired with each other providing a self-leveling movement; and a balance system, which can freely deviate from its position relative to the deck, with its own actuators and which is arranged to at least one side of the working platform, providing an even distribution of weight enabling the working platform to remain upright and steady, regardless of the floating structure. The lifting system is associated with the balance system by the plurality of arrangements of motion units, which assure the substantially constant angle between the working platform and the working frame, providing free linear movement relative to the working frame regardless of the base structure and the floating structure.

The offshore jack-up has a hull and a plurality of moveable legs engageable with the seafloor. The offshore jack-up is arranged to move the legs with respect to the hull to position the hull out of the water. The method comprises moving at least a portion of a vessel underneath the hull of the offshore jack-up or within a cut-out of the hull when the hull is positioned out of the water and the legs engage the seafloor. A stabilizing mechanism mounted on the jack-up is engaged against the vessel. The stabilizing mechanism is pushed down on the vessel to increase the buoyant force acting on the vessel.

A device for levelling an offshore foundation construction including a cylinder equipped with a fastening member for removably fastening the cylinder to a part of the offshore foundation construction, a rod mobile in axial translation with respect to the cylinder, the rod including a pushing end so configured to push against a mudmat.

A foundation (1) for a structure such as an off-shore wind turbine. The foundation (1) comprises a body (4) having a lateral surface (8,9) and a distal end (5) for insertion into a soil (2). At least a region of the lateral surface (8,9) forms a first electrode. A second electrode (7) is provided on the lateral surface (8,9) of the body (4) and is electrically insulated from the first electrode. The body (4) further comprises a spacing formation (6) for forming a gap (11) between the second electrode (7) and the soil (2) when the body (4) is inserted into the soil (2). In use, an electric potential may be established between the electrodes to induce electro-osmosis in the soil for allowing the foundation to be installed more easily. The polarity of the electric potential may also be reversed for stabilising the foundation.

A transportation device for an offshore platform, including a vessel and a floating structure which are fixedly connected. The floating structure is placed on a sea surface and is configured to assist the vessel to sail. The floating structure is provided with an adjustment mechanism which is configured to adjust the floating structure to rise and fall relative to the sea surface. A rail is arranged on the vessel and is in sliding connection with the topside module, so that the topside module slides onto the vessel from land. During the transportation of the topside module, the buoyancy of the floating structure is adjusted through the adjustment mechanism, so that the floating structure provides sufficient anti-rolling moments beside the vessel, thereby reducing the vibration of the topside module caused by the winds and waves during the sailing and reducing the potential damage to the topside module.

A system and method are disclosed for building a modular electrical system for a jack up rig, the method including but not limited to identifying rig equipment on the jack up rig that will be connected to the modular electrical system; selecting electrical equipment to control the rig equipment; placing the electrical equipment in an electrical module; and electrically connecting the electrical equipment to power cables and control cables inside of the electrical module; and testing the electrical equipment inside of the electrical module.