A connection structure for connecting a seabed anchor to a superstructure for electrical power engineering has a horizontally encircling, vertically extending wall, which bounds a spatial region inside the connection structure. A first connecting section is configured for connection to the superstructure. A second connecting section is configured for connection to the seabed anchor.

The invention relates to an assembly (1) comprising: a hollow component (2) with a component opening (3), a cover (4), by means of which the component opening (3) is closed, and a fan (5) for ventilating the interior (6) of the component (2), wherein the fan (5) is pivotally secured to the cover (4). The component opening of the component (2) can be closed by the cover (4) so that the interior (6) of the component (2) is protected against external influences. The formation of mold in the interior (6) of the component (2) can be prevented by means of the fan (5). Because the fan (5) is pivotally held on the cover (4), the interior (6) of the component (2) is particularly readily accessible.

Provided is a transition piece for a wind turbine, to connect a wind turbine to a foundation, wherein the transition piece includes a connection area to be connected to a foundation.

Provided is a foundation building system for an offshore wind turbine, whereby a monopile is configured to be placed on the seabed, having an upper portion) with a first attachment interface for attaching a foundation platform unit, at least one internal, second attachment interface in an interior cavity of the monopile for attaching at least one electrical platform unit, and a third attachment interface for attaching a tower of the offshore wind turbine atop the at least one electrical platform unit, wherein the upper portion is to be placed at least partly above sea level, the foundation platform unit providing at least one foundation platform extending around the tower when installed, and the at least one electrical platform unit comprising at least one platform for electrical equipment for guiding and/or connecting of an connection cable for connecting the offshore wind turbine.

A method of building an offshore windmill includes, using a 3D-heave-compensated crane, placing on a windmill pedestal a lifting jack having a receiving region, and fixing the lifting jack to the windmill pedestal such that the lifting jack can be later removed, and such that a windmill column can be placed within the receiving region directly on the windmill pedestal. The windmill generator is installed using the 3D-heave-compensated crane. The windmill column is partially erected on the windmill pedestal using the 3D-heave-compensated crane and the lifting jack. Before the windmill is fully erected, windmill blades are placed on the windmill generator using the 3D-heave-compensated crane, and the erection of the windmill column on the windmill pedestal is completed using at least the lifting jack. Using the 3D-heave-compensated crane, the lifting jack is removed from the windmill pedestal.

Provided is a method of installing a Gravity Based Structure (GBS). The method involves installing a substructure at a position to be below the GBS, the substructure providing a foundation upon which to support the GBS when installed, and installing the substructure to define at least an annular support region for the GBS. The method further involves installing the GBS above the substructure with the annular support region therebelow, and pre-installing the substructure in advance of the GBS, with the GBS being installed above the substructure subsequent to the substructure's installation.

A sliding subsea foundation comprises a polymeric shoe layer on the underside of a mudmat or subsea structure. The shoe layer defines a soil-engaging face that comprises an array of parallel grooves. The grooves are shallower than the thickness of the shoe layer such that each groove has a closed top, defined by and integral with the shoe layer, that spans the groove. Where a subsea structure is supported on the foundation with a subsea pipeline attached to the structure, the grooves are substantially parallel to a longitudinal axis of the pipeline.

Various embodiments relate to a method and a seabed supported base structure for providing a shallow water drilling terminal, where a prefabricated floating seabed substructure is towed to site, ballasted to rest on the seabed and/or piled to the seabed forming a seabed foundation. The seabed supported base structure is provided with at least one cantilevered unit with openings for drilling of wells, projecting sideways out from the exterior side of a vertical wall, terminated above sea level. A prefabricated floating drilling module provided with an outrigger with sidewise movable drilling device is towed to the site, guided into the seabed substructure through an opening in the wall structure at the periphery of the base structure, ballasted and mated onto the base structure, whereupon wells are drilled from a drilling gear. Upon completed drilling and operation of the wells, the drilling unit is removed and substituted by a production unit.

A bipod for use in ice prone offshore environments comprising a deck connected across a pair of members, each member having a neck, and angled portion disposed at the sea surface, and a base secured to the seafloor. The base is secured using a gravity-based system or pilings. An interior zone is defined between the pair of members which is maintained largely free of ice and provides ready access to the sea surface for resupply or emergency egress.

A monopile foundation in the form of a cylindrical steel pipe that can be driven into the bottom of a water basin. The monopole foundation includes a bottom area, and an area above the bottom area. The area above the bottom includes a connection flange, and a tight membrane consisting of a bottom panel and of a top panel with at least one reinforcing rib, and filling between the panels. Above the membrane, the monopile foundation contains dry functional space between the membrane and the top connection flange, while in the bottom area of the monopile foundation, below the bottom panel of the membrane, there are openings in the cylindrical steel pipe of the monopile foundation. The space between the bottom panel of the membrane and the top edge of the outlet openings is filled by an air cushion.