Abstract: The method of loading a loading space (1) of a vessel with dredging materials includes a) loading a slurry including of dredging materials and water into the loading space (1), and b) generating at least one pressure wave through the slurry inside the loading space (1) to enhance the formation of a settled bed (5) of the dredging materials.

Abstract: The pump housing (2) includes a circumferential wall (3), a pump casing (20) and a shaft cover (40). The pump casing (20) is attached to the circumferential wall (3) by a plurality of connection elements. The pump casing (20) includes a central opening (27) to form an axial supply (14) of the pump housing (2) for material to be pumped. The circumferential wall (3) closes the pump housing (2) along its outer circumference. The pump (1) includes a plurality of connection elements (22) connecting the pump casing (20) to the circumferential wall (3). The connection elements (22) are positioned in groups along the circumference of the pump housing (2), wherein the groups are regularly distributed along the circumference of the pump housing (2).

Abstract: The invention relates to a workstation (1) for transporting equipment to an underwater position. The workstation (1) comprises a tool (23) and a supply line (22) in order to power the tool (23). The workstation (1) comprises a winch (21) for storing at least part of the supply line (22). The workstation (1) may comprise two or more tools (23, 23?, 23?) and associated supply lines (22, 22?, 22?) in order to power the respective tools (23, 23?, 23?). The workstation (1) comprises two or more winches (21, 21?, 21?) for storing the different supply lines (22, 22?, 22?).A single umbilical combines two or more main supply lines (31, 31?, 31?) associated with the respective supply lines (22, 22?, 22?) stored on the different winches (21, 21?, 21?).

Abstract: A pile driver system for installing or removing foundation elements, such as piles, anchors, and conductors, in a subsea ground formation, includes a closed housing defining a cavity, an impact weight accommodated inside the housing, a hydraulic circuit for reciprocating the impact weight, which circuit comprises one or more valves, a cylinder, and a piston accommodated in the cylinder and connected to the impact weight, a pump for withdrawing water from the surroundings of the pile driver and providing pressurized water to the hydraulic circuit, and at least one outlet for returning water to the surroundings. The exhaust of the hydraulic circuit communicates with the cavity and the outlet is located in the wall of the housing.

Abstract: A vessel includes a floating body (1), an excavating device (3) having a base member (4), an extendable arm member (5) which at one end thereof is coupled with the base member and an excavating element (6) mounted at the other end of the extendable arm member. The excavating device (3) is rotatably coupled with the floating body (1) for rotation of the excavating device in an excavator rotating area. Via an anchoring system coupled with the vessel for anchoring the floating body (1) and having a number of spuds (7, 8), the vessel may be anchored with respect to the bottom at the location to be excavated. At least one of the number of spuds (7) is a divisible spud including a plurality of spud sections (8) coupled end to end in series.

Abstract: The invention relates to a device for the utilization of wave energy, with an increased efficiency. Thereto, the device according to the invention comprises a Darrieus rotor having at least two Darrieus rotor blades, wherein the Darrieus rotor has a solidity ?D, and a Wells rotor having at least two Wells rotor blades, wherein the Wells rotor has a solidity ?W, wherein the Darrieus rotor and the Wells rotor are rotatable about a common axis of rotation A, and ?W is larger than or equal to ?D. The invention also relates to a method for harnessing wave energy.

Abstract: A vessel (10) includes a crane (12) for positioning diver transfer equipment (36) and/or diver equipment (38) overboard the vessel (10) into a body of water (2). The crane (12) includes: a crane base (24) connected to the vessel (10); a crane arm (14) with a suspension point (16) that is movably connected to the crane base (24); and control elements (26) for controlling the crane arm (14) configuration. The control elements (26) are configured for: determining a change in position and/or orientation of the crane (12) resulting from vessel motion, and dynamically adjusting the crane arm configuration to change the position of the suspension point (16) with respect to the crane base (24) so as to at least partially compensate for the change in position and/or orientation of the crane (12).

Abstract: The present invention relates to a device for the passive reduction of the sound vibrations in a liquid resulting from a sound source arranged below the liquid level of a body of water, the device comprising an elongate tube which can be arranged over the sound source, the tube comprising an outer wall and inner wall, wherein the tube is designed to maintain a certain desired pressure in the intermediate space between the inner and outer wall. In this case, the pressure is reduced with respect to the ambient pressure. As a result of the reduced pressure, the sound vibrations will less readily travel to the outside and the noise level in the area around the tube is reduced.

Abstract: The present invention relates to a device for passively reducing the noise vibrations in a liquid resulting from a sound source which is arranged below the liquid level of a body of water, the device comprising a noise-insulating pipe which is designed to be arranged around the sound source, wherein the pipe comprises a number of telescopically extendable and retractable pipe sections, fastening means for attaching at least one first and one second pipe section to one another in extended and/or retracted position, wherein the fastening means are designed to allow the mutual displacement of the pipe sections in a starting position and to attach the pipe sections to one another in a fastening position, and wherein the fastening means are also designed to keep the first and second pipe sections substantially acoustically disconnected in the fastening position.

Abstract: A riser system for transporting slurry from a sea bed (4) includes a vertical riser pipe (10) and at least one pump (30) provided along the riser pipe (10). The riser pipe (10) includes a pipe input opening (12). The riser system includes a frame (40) to which the pump (30) is mounted. The frame (40) has a first connection member (41) at a predetermined distance from a pump output opening (32). The riser system includes a second connection member (15) provided along the riser pipe (10) at the predetermined distance above the pipe input opening (12). The first and second connection member (41, 15) are rotatably connectable allowing the frame (40) to rotate under the influence of gravity to a hanging position in which the pump output opening (32) connects to the pipe input opening (12).

Abstract: A drag head (100) for dredging material (2) from the bed (3) of a body of water and transporting the material (2) to a suction tube (120). The drag head (100) is arranged to be dragged over the bed (3) in a dragging direction (D). The drag head (100) includes a suction section (110) in which an under pressure can be created to suck up the material (2) from the bed (3) through a suction opening (113) into a suction chamber (112). A heel section (111) guides the drag head (100) along the bed (3). The suction section (110) is preferably rotatably connected to the heel section (111). The suction section (110) also includes an outlet (114) for transporting the material (2) towards the suction tube (120).

Abstract: A vessel for e.g. well intervention or deep sea lowering, comprises a moon pool and a hoisting arrangement for lowering and retrieving items, in particular equipment, tools, and/or supplies or modules comprising the same, through the moon pool, into respectively from the sea and onto respectively from the seabed or an installation on the seabed. The vessel further comprises one or more guides for laterally retaining items inside the moon pool, preferably at least two guides positioned on opposite sides of the moon pool.

Abstract: The invention relates to a method of installing foundation elements, in particular (mono)piles (2), in an underwater ground formation (3), by means of a driver (4), comprising the steps of placing a foundation element (2) on the underwater ground formation (3) and holding the foundation element (2) in place by means of a gripper (10) mounted on a surface vessel, placing a sleeve (6) for reducing noise input from the driver (4) about the foundation element (2), disengaging the gripper (10), lowering the sleeve (6) onto the ground formation (3), and placing the driver (4) on top of the foundation element (2). The sleeve (6) is held at least laterally with a guide (11) mounted on the surface vessel, at least when disengaging the gripper (10).

Abstract: A vessel (4) includes a crane (1) connected to a deck (5) of the vessel. The crane (1) includes a frame (10) which is rotatable about a horizontal hinge axis (H), a rotation mechanism (20) connected to the frame (10) at a position away from the horizontal hinge axis (H), arranged to rotate the frame (10) about the horizontal hinge axis (H) from an upper position to a lower position and vice versa, and a swivel member (30), which is with a first end (31) rotatable connected to the deck (5) and which is with a second end (32) rotatable connected to the rotation mechanism (20). The swivel member (30) is rotatable between an inward position associated with the upper position of the frame (10) to an outward position associated with the lower position of the frame (10).

Abstract: The invention relates to a measuring system for controlling perpendicularity of a pile during driving of the pile, wherein the measurement system comprises; a mounting frame for coupling the measuring system with a pile driving system, a measuring frame provided with at least one measuring device for measuring perpendicularity of the pile. A measuring system for controlling perpendicularity of a pile during driving of the pile, wherein the measurement system includes; a mounting frame for coupling the measuring system with a pile driving system, a measuring frame provided with at least one measuring device for measuring perpendicularity of the pile.

Abstract: The invention relates to a centrifugal pump (1) comprising a pump housing (2) which is provided with an axial inlet (6), an outlet (5) and a rotor (7) which is attached in the pump housing (2) such that it can rotate about an axial rotation axis A. The rotor (7) is provided with a central boss (9), a shaft shield (11) fastened to the boss (9), a suction shield (12) attached so as to be axially set apart from the shaft shield (11), which suction shield (12) has an axial supply (14) aligned with the axial inlet (6) of the pump housing (2), and a plurality of rotor blades (15) which are fastened between the shields (11, 12). The radial inner ends (18) of the rotor blades (15) are connected to the suction shield (12) by a substantial perpendicular connection.

Abstract: The invention relates to a system for installing or removing foundation elements, such as piles, anchors, and conductors, in a subsea ground formation, comprising an impact weight, an hydraulic circuit in turn comprising an hydraulic cylinder for lifting and/or accelerating the impact weight respectively away from and towards the element, the cylinder comprising a piston connected to the impact weight, and wherein a pump for generating an underpressure in the hydraulic cylinder such as to lift and/or accelerate the impact weight by means of this underpressure.

Abstract: The invention relates to a system for installing tubular foundation elements having open ends, in particular (mono)piles, in an underwater ground formation, comprising an hydraulic driver, an anvil, and an adaptor for transmitting energy from the anvil to the toe of the foundation element, which adaptor fits inside the tubular foundation element.

Abstract: A lifting device configured to autonomously position a wind turbine blade in such a way that it can be mounted on a wind turbine tower. The lifting device (1) comprises a boom structure (2) and is furthermore provided with a positioning device (4) which is connected to the boom structure and can be displaced along the latter. The positioning device comprises a mounting structure (4f) for detachably mounting the wind turbine blade on the positioning device. The boom structure (2) and displacement structure (4a) of the positioning device (4) form an assembly for the approximate positioning of the mounting structure (4f) with respect to the wind turbine tower. The positioning device (4) furthermore comprises additional means (4d, 4e) for accurately positioning the wind turbine blade with respect to the wind turbine tower.