Abstract: An offshore structure includes a floating support carrying process equipment and a processing column supported thereon. The processing column is connected via a hinging connection such as to maintain its upright position under low frequency inclinations of the vertical center line of the floating support.

Abstract: A method of mooring a vessel to a subsea anchoring element (1) connected to the seabed, and comprising a chain section (3) which is not longer than half the water depth, and which is at or near its free end provided with a coupling member (4), is characterised by the steps of: lowering a multi-strand anchor line (9) from a vessel (8), the multi-strand anchor line (9) being at its free end attached to a connector (10), and attaching the connector (10) to the coupling member (4). The present disclosure also provides an anchor line repair or exchange method comprising the steps of: disconnecting the first multi-strand anchor line (16) from the chain section, lowering a second multi-strand anchor line (9) from a vessel (8), the second multi-strand line (9) being at its free end attached to connector (10), and attaching the connector (10) of the second multi-strand line (9) to the coupling member (4).

Abstract: A method of constructing SPAR buoys comprising an elongate floating body (1) and a deck structure (2). The elongate body (1) is transported to the mooring site in its horizontal position. During erecting of the floating body (1) by ballasting it with water and alignment with the deck structure (2), the deck structure (2) remains attached to its buoyancy member (7). Hereby the use of large derricks can be avoided which provides a substantial cost reduction. After erecting the floating body, the body (1) may be ballasted to pass below the floating deck structure (2). Alternatively, the deck structure (2) may be deballasted or pulling cables (14) may be used to pull the coupling member (4) of the floating body (1) into contact with the coupling member (12) of the deck construction. Alternatively, the floating body (1) is at its upper ends connected to the deck structure (2) via a pivoting connection (22) such that during coupling the floating body may be hinged against the deck structure (2).