Described is a device for providing a sizeable, slender object having a longitudinal direction into an underwater bottom from a deck of a vessel. The device includes a lifting means configured to take up the object at a lifting point thereof and position it on the underwater bottom; an upending tool connected to an edge of the vessel and configured to engage a first circumferential part of the object suspended from the lifting means and provide a pivot around which the object can be upended; and a gripping tool connected to an edge of the vessel and configured to engage a second circumferential part of the object suspended from the lifting means, whereby the first and second circumferential parts are optionally spaced apart in the longitudinal direction of the object. The gripping tool includes an actuator system configured to act on at least one of the upending tool and the gripping tool and control movements of at least one of the first and the second circumferential parts, relative to the vessel. A method using the device is also described.

A monopile comprising a body (1) having a hollow interior, a toe (9) at a distal end for insertion into a soil (19) during monopile installation, and a proximal end region (2) for supporting a structure (7), such as a wind turbine tower, once the monopile has been installed. The body (1) further comprises a door aperture (12) provided in the body (1) for accessing the interior of the body (1). The door aperture (12) is configured to receive a door assembly (6,18) once the monopile (1) has been installed.

A tubular joint includes a tubular substrate extending along an axis. The substrate has a first inner diameter. A first tubular brace member is additively manufactured on the substrate and is connected thereto at a proximal end of the first tubular brace member. A second tubular brace member is additively manufactured on the substrate and is connected thereto at a proximal end of the second tubular brace member. At respective distal ends of the brace members, the first tubular brace member and the second tubular brace member have a circular cross-sectional shape having a distal wall thickness and a second inner diameter that is smaller than the first inner diameter. At the proximal ends the of brace members, the first tubular brace member and the second tubular brace member have respective proximal wall thicknesses that are greater than the distal wall thickness.

A tubular joint includes a tubular substrate extending along an axis. The substrate has a first inner diameter. A first tubular brace member is additively manufactured on the substrate and is connected thereto at a proximal end of the first tubular brace member. A second tubular brace member is additively manufactured on the substrate and is connected thereto at a proximal end of the second tubular brace member. At respective distal ends of the brace members, the first tubular brace member and the second tubular brace member have a circular cross-sectional shape having a distal wall thickness and a second inner diameter that is smaller than the first inner diameter. At the proximal ends the of brace members, the first tubular brace member and the second tubular brace member have respective proximal wall thicknesses that are greater than the distal wall thickness.

A system for levelling and gripping a jacket leg into a hollow foundation pile has a levelling assembly for adjusting the longitudinal axis of a jacket leg partially inserted in a hollow foundation pile with an actuation group arranged about the jacket leg and configured to exert a force parallel to the longitudinal axis between the upper edge of the hollow foundation pile and the jacket leg and selectively attachable to the jacket leg and recoverable for further use in another levelling assembly; and a gripping assembly for locking the jacket leg in a designated position with respect to the hollow foundation pile once leveled.

A method of connecting a lower pipe portion to a subsea foundation is provided. The method comprises: providing the subsea foundation, wherein the subsea foundation comprises an upper pipe portion connected to the subsea foundation, deploying the subsea foundation subsea; and connecting the lower pipe portion to the upper pipe portion. A subsea foundation system is also provided. The subsea foundation system comprises: a subsea foundation; an upper pipe portion connected to the subsea foundation, and a lower pipe portion, wherein the subsea foundation system is arranged such that subsea the lower pipe portion can be connected to the upper pipe portion. The lower pipe portion may be connected to the subsea foundation in a stowed position before deployment subsea. The lower pipe portion may be connected to a pull-in arrangement before deployment subsea. The subsea foundation may comprise a pipe overlap section that is arranged to overlap a portion of the upper pipe portion and/or the lower pipe portion when the lower pipe portion is connected to the upper pipe portion.

The invention concerns a method for installing a tubular metal pile (28) in a rocky ground, successively comprising drilling the rocky ground (6) in order to form a cavity (14) of predetermined diameter and depth, filling the cavity with a granular material (18), arranging the granular material present in the cavity by vibration, and installing the pile in the cavity.

The present disclosure relates to a foundation profile for an offshore structure. The foundation profile includes a profile end portion, which is arranged in an offshore subsoil in the intended state of the foundation profile. Further, at least one elongated hollow body is arranged at the profile end portion in the intended state. The elongated hollow body is configured to receive a swellable material.

Offshore structure that is provided with a supporting system with one, two, three or more suction buckets (1) to be installed in the seabed, which buckets are fastened to the rest of the foundation system and with a star-shaped, seen in top view, connector body (6) of reinforced mineral cement concrete with the same number of external corners as there are suction buckets, which external corners are formed by the radial outwardly extending arms which provide the star shape and with a single vertical central column (5) placed centrally between the suction buckets, seen in top view, formed by a single tube and made of e.g. thin-walled steel, which carries the gondola of the windmill at its top, the gondola with the rotor blades at least 20 meters above the local water level.

Offshore structure that is provided with a supporting system with one, two, three or more suction buckets (1) to be installed in the seabed, which buckets are fastened to the rest of the foundation system and with a star-shaped, seen in top view, connector body (6) of reinforced mineral cement concrete with the same number of external corners as there are suction buckets, which external corners are formed by the radial outwardly extending arms which provide the star shape and with a single vertical central column (5) placed centrally between the suction buckets, seen in top view, formed by a single tube and made of e.g. thin-walled steel, which carries the gondola of the windmill at its top, the gondola with the rotor blades at least 20 meters above the local water level.