151results about "Buoyancy means" patented technology

A Method and Apparatus for Wake Enlargement System have been disclosed. By using water pick ups that are mounted or deployable on a boat controlled filling of ballast tanks is possible without the use of pumps.

A floating wind turbine comprising a hull (1), a wind turbine (2) mounted on top of the hull (1) and a counterweight (3) suspended below the hull (1) by means of counterweight suspension means (18) isdescribed. Also a method for the installation is described. The counterweight (3) comprises one or more counterweight buoyancy tanks (17). When the internal volume of the buoyancy tanks (17) is filled with air, the total buoyancy of the counterweight (3) is close to or greater than its weight. Hereby it is capable of floating in a towing / maintenance position with moderate or no support in the vertical direction from the hull (1) or other vessels. During towing, the hull substantially has the character of a barge, substantially relying on a large waterplane area and shallow draft to maintainstability. When the buoyancy tanks (17) are partly or completely flooded with water, the counterweight (3) will sink to an installed position at a level determined by the counter- weight suspension means (18). In this position the counterweight acts as a keel, stabilizing the foundation. The counterweight suspension means (18) are separately or jointly capable of transfer- ring both forces and moments to the hull (1), thereby enabling the counterweight (3) to stabilize the hull (1) when the counterweight (3) is in its installed position.

An offshore structure is separated into an upper structure and a lower structure. Part or whole of the lower structure is kept in an upright standing state in water. The upper structure is moved to above the lower structure kept in the upright standing state. A uniting step includes one or both of raising the lower structure to arrange the lower structure on a lower side of the upper structure and lowering the upper structure to arrange the upper structure on an upper side of the lower structure by submerging part of a carrier vessel on which the upper structure is mounted while being held by a pair of arm-shaped structures of the carrier vessel and integrating the lower structure with the upper structure. In this way, an offshore structure is moored safely at an offshore installation site without using a crane vessel.

The invention relates to a floating structure comprising: a flotation base comprising at least one substantially hollow body which can be filled selectively with ballast, the maximum horizontal dimension of the flotation base being greater than the maximum vertical dimension of the flotation base; a construction supported on said flotation base preferably comprising a telescopic tower; downward thrust means; and at least three retaining cables, the upper ends of which are connected to the flotation base, preferably in peripheral positions of the flotation base, and the lower ends of which are connected to the downward thrust means, such that the retaining cables are under tension and apply to the flotation base a downward force which increases the stability of the floating structure. The invention further relates to a method of installing this floating structure.