Abstract: A method of mooring a vessel to an anchoring structure connected into the floor of a body of water wherein a drum containing a coiled mooring cable is lowered down to the anchoring structure, a first end of the coiled mooring cable is attached to the anchoring structure, and the second end of the mooring cable is then raised and attached to the vessel to be moored, while the drum with remaining coiled mooring cable remains adjacent the anchoring structure below the water's surface.

Abstract: Equipment which extends from a floating structure towards the ocean floor therebelow is supported on the floating structure by a device which includes at least two hydraulic cylinders which are arranged between the floating structure and the equipment, the hydraulic cylinders being connected to a source of hydraulic pressure fluid, and a valve apparatus which is connected via a first conduit to each hydraulic cylinder on the piston rod side of its piston and via a second conduit to each hydraulic cylinder on the opposite side of its piston. The valve apparatus connects the first and second conduits for each hydraulic cylinder under normal conditions, but under deviant pressure conditions in one hydraulic cylinder breaks the connection between the first and second conduits of the other hydraulic cylinders and connects their first conduits with the first and second conduits of the deviant hydraulic cylinder.

Abstract: The present invention relates to a joint for trusses having members comprising tube-like hollow bodies, comprising a core member to which is welded a plurality of transition pieces to which free end a tubular member can be welded, the cross section of the transition pieces changing between the free end of these and the end which is welded to the core member.

Abstract: A method for deaerating liquids, especially water, where liquid is introduced into a vacuum zone containing liquid distributing means, and where said liquid after deaeration is conveyed out from said zone is improved in that said water in said vacuum zone is ejected toward at least one vertical impingement surface of a porous material, whereby foaming is counteracted, and is directed via said porous material toward an outlet from said vacuum zone. An apparatus for carrying out said method comprises a casing (1) connected with an evacuation system (16,17,18,19), means (8) for introducing a liquid, e.g. water, into said casing and an outlet (15) for discharging treated liquid, and is characterized in that at least one vertical impingement surface of a porous material (6,11) preventing foaming is provided within said casing (1) as well as means (9) being provided for applying a liquid on the porous surface (6,11).

Abstract: The present invention relates to a riser device which extends from an underwater installation up to a structure situated near the water's surface, and which comprises at least three rigid, elongate members each having associated therewith at least one fluid flow line. The elongate members are interconnected by means of universal joints and have sufficient lengths that the total length of the riser device will exceed the distance between the underwater installation and the structure.

Abstract: A process for regeneration of a filter medium is provided according to which the filter medium is treated with a liquid which breaks down deposited organic materials on the filter medium. The preferred liquid for regeneration of the filter medium is concentrated sulphuric acid.

Abstract: An upper deck structure which contains the equipment necessary for operation of an oil rig is positioned on top of the main deck of the rig, the main deck being supported by vertical pilings or columns. The upper deck is not rigidly connected to the main deck but is held in place by frictional engagement therebetween. Such engagement can be enhanced by the placement of a rubber layer between the two decks. The oil rig is consequently made much lighter in weight and is easier to put together.

Abstract: A piston pump includes a fluid flow control system positioned between the fluid intake duct and the intake aperture of the piston cylinder, the control system including a cylindrical sleeve which is in fluid communication with the intake duct, a valve piston movable in the cylindrical sleeve, a valve stem connected to the intake valve in the piston cylinder extending through both the intake aperture and the valve piston, a first spring positioned between the valve piston and the piston cylinder, a second spring positioned between the piston cylinder and the end of the valve stem, and a fluid by-pass control device for regulating the amount of fluid passing from the intake duct around the valve piston to the intake aperture.

Abstract: A junction housing, which is removably positionable on the subsea floor, includes coupling halves for connection to complementary coupling halves of Christmas trees on subsea hydrocarbon wells, the coupling halves being connected by pipes and cables to separate coupling halves which are connectable to complementary coupling halves on a suitable riser.

Abstract: A parking device for containing a blowout preventer aboard a floating drilling station. The parking device includes a parking frame which is capable of holding the blowout preventer with its center of gravity lying above the points at which the blowout preventer is supported on the parking frame. The blowout preventer can be moved as a unit back and forth between a parked position and an installed position for utilization on the drilling station. For enabling such movement a first drive mechanism is provided for raising and lowering the parking frame and additionally a second drive mechanism is provided for moving the parking frame sideways.

Abstract: A vessel having at least one container for the transportation of cooled, liquefied gas or the like, the vessel having at least one cargo hold located below the deck of the vessel, side tanks below the deck extending transversely outwardly of the cargo hold, and the transverse cross-sectional area of the cargo hold being slightly less than the maximum cross-sectional area of the container so that the container is supported by the cargo hold whereby the lower portion of the container extends only slightly downwardly within an open top portion of the cargo hold.

Abstract: A deck structure is assembled on a base structure which extends upwardly out of a body of water and is supported on the bottom of the water body. The deck structure is separately constructed as a self-supporting horizontal unit at a building site such as a pier, and floating barges are provided for supporting the deck structure outwardly of the building site. The deck structure is thereafter transferred to the base structure by means of the barges.

Abstract: An arrangement is provided for the filling and emptying by gravitational means of caissons having oil stored therein, the caissons being filled to capacity with water and/or oil and being located below the level of a body of water. Containers are provided which are also disposed below the level of the body of water but above the level of the caissons, one of the containers containing oil being connected with the caissons through top portions thereof and another of the containers containing water being connected with the caissons through bottom portions thereof so that the caissons may be emptied of and filled with oil under the forces of gravity as the level of water in such other container is regulated to a level respectively higher and lower than the oil level in said one container.