Assembling a jacket structure that includes two or more legs and crossing braces extending between the legs and forming cross joints. A first component of the jacket structure includes two or more legs and brace structures. Each brace structure includes a first brace and a second brace, sections of the first and second braces being at one end attached to the first leg at respective first and second leg-brace joints. The brace structure and the first leg form an A-frame. A second component of the jacket structure that includes a second set of brace structures and a second part of the brace cross node is further provided. The first component of the jacket structure is mounted to the second component of the jacket structure by joining the first and second parts of the brace cross nodes to form full brace cross nodes.

Assembly of a suction pile and a pump system temporary connected by convenient means to the suction space of the suction pile, wherein the pump system bears onto the top of the upward extending suction pile. Between suction pile and pump system a quick connector is operative comprising a pin operated by actuator means of the pump system to move between a releasing retracted and locking extended position. It has one or more of: a pump interface remote from the protective frame; an auxiliary support frame; a hinged lift appliance; a level indicator; a docking cone designed to penetrate the suction pile interface means.

A method of ballasting a vessel comprises positioning a vessel having a first draft adjacent to or underneath an offshore installation. The vessel has at least one ballasting tank and at least one port in fluid communication with the at least one ballasting tank. The at least one ballasting tank is arranged to selectively adjust the flow of ballast water in and out of the at least one ballasting tank. The method comprises pushing down from the offshore installation on the vessel to increase the draft of the vessel from the first draft to a second draft. The method further comprises opening the at least one port when the vessel is at the second draft and the at least one port is below a waterline. The method also comprises filling at least part of the at least one ballasting tank.

A method is provided for connecting two tubular or conical sections of a structure, especially of a wind turbine, by joining respective circular ends of the outer walls of these sections by welding, including the steps: positioning the two sections in such a way, that the circular ends are adjacent to each other, positioning a first part of a connection tool adjacent to the circular ends of the two sections, positioning a second part of the connection tool in such a way that the first and second part of the connection tool form a ring-shaped housing, blocking access to the circular ends from the outside of the sections, and using a welding head of the connection tool arranged within the ring-shaped housing to join the outer walls.

To upend and lift an object, e.g. a foundation member of an offshore wind turbine, e.g. a monopole, use is made of an upending and lifting tool, wherein, with the tool suspended from one or more hoisting cables, e.g. from a crane hook of a crane, and with the frame of the tool initially in vertical orientation, a routine is performed which includes operating one or more shifting actuators, thereby moving a cable shifting member and engaging a cable engagement surface with the one or more hoisting cables at a height above a pivot axis. Further continuing this motion of the cable shifting member and thereby applying a cable shifting force on the one or more hoisting cables results, in reaction, in a pivoting of the frame into the horizontal orientation thereof.

The invention relates to an upending system for an elongated tubular element like an offshore foundation pile or a turbine mast, the system comprising; a pile frame for supporting a elongated tubular element, the pile frame comprising a pile support member for engaging a pile wall in order to avoid movement of the elongated tubular element with respect to the pile frame, and a coupling section, a support structure for supporting the pile frame, wherein the coupling section is rotatably supported by the support structure to allow rotation of the pile frame with respect to the support structure, wherein the support structure and the coupling section of the pile frame are configured such that the pile frame is detachably coupled to the support structure.

A sealing system for use in an offshore wind turbine includes two interconnected tubular members, and a flexible sealing member. The flexible sealing member includes, seen in cross section: an annular attachment part; an annular strip shaped sealing part which is connected to said attachment part by means of an annular hinge portion of said sealing part, and which sealing part extends away from said attachment part in a direction which has a first component in a direction which is parallel to the axis of the annular attachment part; and an annular strip shaped actuator part extending from said hinge portion of said sealing part in a direction which has a component in the radial direction.

There is provided a renewable power generation farm for fishing work, the farm comprising: a plurality of mutually connected floating ships, wherein each ship is configured to generate an energy using solar and wind power, wherein each ship comprises: a main elongate floating structure; a wind-based energy generation device secured to the main elongate floating structure; a transverse beam extending perpendicularly to a longitudinal direction of the main structure; a longitudinal beam extending in a parallel manner to the longitudinal direction of the main structure; connection beams connecting both opposing ends of the transverse beam and both opposing ends of the longitudinal beam respectively; auxiliary pillars vertically extending through the both ends of the transverse beam and the longitudinal beam respectively; solar-based energy generation devices disposed at top ends of the auxiliary pillars respectively; and auxiliary elongate floating structures disposed at bottom ends of the auxiliary pillars passing through the ends of the transverse beam.

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.

The invention relates to a tower of a wind power plant, having a lower part in the form of a lattice tower or truss tower with at least two corner bars, and an upper part in the form of a cross-sectionally substantially round tubular tower, wherein each particular corner bar is put together from a plurality of steel tube profiles that are connected together in the longitudinal direction. In order to achieve good transportability and easier assembly of the components of such a tower, the invention proposes a modular tower concept. According to the invention, each particular corner bar is in this case put together from at least three steel tube profiles which are provided with perforated flanges for holding screws, wherein the corner bars are connected together by cross struts and/or tension struts attached to the flanges, and wherein the steel tube profiles of each particular corner bar are spirally welded steel tube profiles.