Abstract:
Feeder vessel for the onshore-to-offshore transport of elongate wind turbine objects with a motion compensating carrier assembly having a motion compensated platform for receiving and retaining the elongate object, and a motion compensation mechanism. The motion compensation mechanism comprises extendable actuators which passively compensate motions of the platform out of a neutral position, and winches driving carrier cables such that traction by the respective carrier winch counteracts an extension of at least one of the carrier actuators. The winches are embodied as active motion compensation winches to compensate movements of the platform.
Abstract:
Vessel having a heave motion compensated carrier to support an object that is to be offloaded by an offloading device of another vessel or offshore structure. The carrier is supported on the hull of the vessel by means of a heave motion compensating support system. The system comprises a hydraulic cylinder, a hydraulic-power unit connected to the rod-side chamber, a medium separator having a hydraulic-side chamber connected to the piston-side chamber of the hydraulic cylinder, and a bank of pressurized gas tanks. The bank comprises a high-pressure tank and low-pressure tanks each selectively connectable via a respective gas tank valve to the gas-side chamber of the medium-separator.
Abstract:
The present invention relates to a reel lay system comprising in combination a vertical reel (20) having a horizontal rotation axis (R), and a reel drive system (1). A length of A&R cable and a length of pipeline (23) are stored on the reel (20), and the reel drive system (1) is configured to unspool and spool the A&R cable and the pipeline from the reel (20).
Abstract:
System and method for providing a vessel with a marine reel lay method pipeline installation system for laying on the seabed a pipeline, wherein the system comprises: - a variable inclination launch tower (20) to be mounted to the vessel, which launch tower is adapted to launch the pipeline in a firing line along said launch tower; wherein the launch tower is pivotable relative to the vessel about an essentially horizontal tower pivot axis to adjust the inclination of the tower; - a pipeline guide (410) which is supported at an elevated position by the launch tower, which pipeline guide is adapted to guide the pipeline from a storage reel over the pipeline guide into the firing line, - a pipeline straightener assembly supported by the launch tower and adapted to straighten rigid pipeline entering the firing line from the pipeline guide, - a tensioner (210) supported by the launch tower, the tensioner having multiple tracks (211,212) adapted to engage the pipeline (11) and to support at least part of the weight of the launched pipeline in the firing line, - a hang off device (120) adapted to clamp and support the weight of the launched pipeline in the firing line; - an abandonment and recovery (A&R) system comprising at least one A&R winch (800) and A&R cable (801), and an A&R sheave arrangement with one or more sheaves (150) provided at a position along the firing line, said one or more sheaves preferably being supported by the tower, adapted to raise, lower and support the weight of the launched pipeline in the firing line; wherein the system comprises a set of launch tower modules that are interconnectable in series to assemble at least a portion of the launch tower, said set at least comprising: - a pivot structure module (100), - a tensioner module (200), - a straightener assembly module (300), wherein at least said pivot structure module, a tensioner module, and straightener assembly module, of the system are stored at a remote location, and wherein at least said pivot structure module, a tensioner module, and straightener assembly module are transported to said vessel as an ISO intermodal freight container, preferably each of said modules having a length that allows for handling of said pivot structure module, a tensioner module, and straightener assembly module, as a 20 ft. (6.1 m) ISO intermodal freight container.
Abstract:
The invention relates to a slew bearing (10, 107) comprising a stationary bearing ring (11) to be fixed to a base (3; 106), a moveable bearing ring (12) to be fixed to a moveable object (7; 102), wherein the stationary bearing ring and the moveable bearing ring are configured to enable rotation of the moveable bearing ring relative to the stationary bearing ring about a rotation axis (9). A main axial bearing (20) and an auxiliary bearing (60) are provided between the stationary bearing ring and the moveable bearing ring, wherein the moveable bearing ring comprises one or more main portions (13a) and one or more auxiliary portions (13b), which one or more main portions are moveable relative to the one or more auxiliary portions between an operational position, in which the main axial bearing transfers the axial loads between moveable bearing ring and stationary bearing ring, and a maintenance position, in which the auxiliary axial bearing transfers the axial loads between moveable bearing ring and stationary bearing ring and the main bearing is allowed to be inspected and/or maintained so that the slew bearing during inspection and/or maintenance is still operational.
Abstract:
The present invention relates to a vessel comprising a flexible hydrocarbon pipeline storage installation. The flexible hydrocarbon pipeline storage installation comprises an annular storage device, the storage device comprising an opening, and a tensioner, adapted to exert a pulling force on a pipeline, comprising two or moretensioner tracks defining therebetween a pipeline passage, extending between a loading end and an opposed storage end of the tensioner. The flexible hydrocarbon pipeline storage installation further comprises a pipeline loading guide, provided near the tensioner, for guiding the pipeline during loading the pipeline into the annular storage device. According to the invention, the tensioner is arranged to have an essentially vertical pipeline passage, wherein the storage end of the tensioner is situated above the opening of the annular storage device, and wherein the pipeline loading guide is provided near the loading end of the tensioner.