An offshore reef assembly includes semi-cylindrical reef members extending generally perpendicular to the shore line and arranged in upper and lower tiers so that the open side of the upper tier faces downwardly and the open side of the lower tier faces upwardly. The semi-cylindrical members in the upper tier are offset from those of the lower tier to divide and deflect vertically moving water laterally through an ogee curvature from one reef member to a laterally offset and inverted reef member...

A lattice framework to form or when forming an offshore structure capable of supporting a deck above the water for offshore operations, such as drilling for oil or gas for exploration or production as well as radar stations and the like where it is desired to maintain a stable platform in a fixed position over the sea bed, having four main legs which branch out into buttresses to support a spread base at the lower part of the structure and in which two of the main legs form launch rails on which...

A compliant concrete structure which is supported by using a compliant pile system consisting of piles and pile sleeves so that the platform may yield to large oscillations when the structure is installed in a body of water. The invention comprises attaching the pile sleeve guides (6) and the pile sleeves (3) to a rotation symmetrical concrete shell which forms the basic structure. The pile sleeves are rigidly connected to the lower end portion (2) of the structure.

In an offshore terminal for loading tankers, a bottom-supported column is surrounded by a floating collar. Standpipes in the column for connection with transfer lines to shore are connected by flexible lines to the collar. A floating station flexibly connected to the collar extends radially from the collar to support rigid pipes. An elongated powered boom having a power unit at each end supports rigid pipes which are connected by flexible hoses to the manifold of a tanker at one end and at the o...

An offshore terminal comprising a number of axially and radially interconnected containers sunk to stand on the sea bed and extending above the sea surface, which containers have a polygon bottom which protrude from the container wall and match each other to form a continuous bottom of the terminal and closed hollows between the containers for interconnecting and ballasting purposes.

A tower suitable for use in offshore well operations and the like and including a plurality of generally vertical columns extending from the bed of a body of water to a position above the surface of the body of water for supporting a platform thereupon. A quaternary batter brace system is connected to the generally vertical columns in a position intermediate the ends of the columns and beneath the surface of the body of water. Piling jacket clusters are connected to the free end of each of the b...

A marine structure, for example an offshore production plantform comprises a floating base section, which can be flooded, having caissons thereon and a topsides mounted on the caissons. The caissons comprise at least two telescopic sections,the uppermost section carrying the topsides and the lowermost being mounted on the base. The structure can be installed by supporting hte topsides for example, using the derrick of a jack-up rig, and then partially flooding the base section until the jack-up ...

An offshore harbor including a first support structure firmly fixed to the sea bed, a first flat slab supported by the first support structure, and a plurality of vertical sidewalls resting on the first slab and being joined together to form a hollow shell which defines an inside portion. The inside portion of the shell houses a portion of the sea, and one of the plurality of vertical sidewalls is provided with an opening so that the inside portion of the hollow shell is in communication with th...

In order to stay the columns in an offshore vessel of the type having two parallel pontoons and an operating platform carried thereby, also with respect to forces tending to displace the pontoons longitudinally in relation to each other, the columns located in the same transverse plane are interconnected by two transverse braces arranged in cruciform close to each other, but lacking direct connection.

An offshore platform of the weighted base kind has a castellated contour at the base of the skirts, the shape of the contour being such as to produce, at the first impact with the ground, a contact line appreciably shorter than the average length of the contour.