Abstract:
An active heave compensation system comprises a motor generator to interact with a load so as to drive the load in a first part of a heave motion cycle and to regenerate at least part of energy with which the load has been driven in a second part of the heave motion cycle, and an electrical storage element for storing the regenerated energy. The active heave compensation system further comprises a power supply electrically connected to the motor generator and the electrical storage element for providing electrical power to at least the motor generator, and a control unit configured to control the power supply substantially in synchronism with the heave motion.
Abstract:
The invention relates to a drilling installation for drilling a well, for example an oil,a gas, or a thermal well, by means of said installation, which installation comprises: -a tower structure; -first hoisting means adapted to manipulate a first object in a first firing line in the longitudinal direction of the tower structure; -second hoisting means adapted to manipulate a second object in a second firing line in the longitudinal direction of the tower structure; -a storage device for vertically storing tubular elements, such as joined tubulars; and -a first pipe racker for moving tubular elements between the storage device and the first firing line; wherein the first and second firing line are located outside the tower structure.
Abstract:
The invention relates to an offshore pipelaying vessel for laying a pipeline on a seabed, comprising a pipeline-laying installation having: - a preassembly line with a joining station to form multi length pipe sections by joining single length pipe sections end to end, - an inspection station associated with said preassembly line for inspecting joints made by the joining station of the preassembly line; - an assembly line with a pipeline assembly station to assemble a pipeline to be launched from the vessel by joining multi and/or single length pipe sections end to end; and - a conveyor system for transporting multi and single length pipe sections, said conveyor system comprising an entry-and-exit location; characterized in that the conveyor system is configured to allow transportation of multi and/or single length pipe sections at least along the following routes: -directly from the entry-and-exit location to the assembly line; -indirectly from the entry-and-exit location to the assembly line via the preassembly line and said inspection station; -from the entry-and-exit location to the preassembly line and said inspection station, and after passing said inspection station directly to the entry-and-exit location.
Abstract:
A hoisting device (10) comprising a hoisting cable (1), a winch, a crown block (5) and a traveling bottom block provided with a load attachment device (55), wherein both the crown block and the traveling bottom block comprise one or more sheaves having an essentially horizontally extending rotation shaft (26) about which sheaves (31a, 31b, 33d, 33b, 33c, 33d) the hoisting cable (1) is reeved. At least some of the traveling bottom block sheaves are associated with a releasable connector, and are thereby detachable from the load attachment device and displaceable to an inoperative position. The invention is characterized in that the rotation shaft of multiple traveling bottom block sheaves and multiple crown block sheaves is essentially perpendicular to the rotation shaft of remaining multiple traveling bottom block sheaves and remaining multiple crown block sheaves.
Abstract:
A heave compensation system comprises a motor-generator to interact with a load and a control unit being arranged to control operation of the motor-generator. The control unit is arranged to: - operate the motor-generator to drive the load in a first part of a wave motion cycle, and - operate the motor-generator to regenerate in a second part of the wave motion cycle at least a part of the energy with which the load has been driven in the first part of the wave motion cycle. The heave compensation system comprises an electrical storage element to buffer at least part of the regenerated energy for powering the motor-generator in a following cycle of the wave motion.
Abstract:
A heave compensation system comprises a motor-generator to interact with a load and a control unit being arranged to control operation of the motor-generator. The control unit is arranged to: - operate the motor-generator to drive the load in a first part of a wave motion cycle, and - operate the motor-generator to regenerate in a second part of the wave motion cycle at least a part of the energy with which the load has been driven in the first part of the wave motion cycle. The heave compensation system comprises an electrical storage element to buffer at least part of the regenerated energy for powering the motor-generator in a following cycle of the wave motion.
Abstract:
A monohull offshore drilling vessel comprising: a hull having a moonpool; - a multiple firing line hoist system mounted on the hull at said moonpool, the multiple firing line hoist system comprising: - a mast having a top side and a base connected to the hull of the drilling vessel, wherein the mast has a hollow construction with a first side and an opposed second side, - a first hoisting device supported by the mast and having load attachment means displaceable along a first firing line, which extends on the outside of and adjacent to the first side of the mast; - a second hoisting device supported by the mast and having load attachment means displaceable along a second firing line, which on the outside of and adjacent to the second side of the mast; wherein the first and second hoisting devices each include one or more cables and one or more associated winches, the winches preferably disposed in the hollow construction of the mast, to manipulate the position of each of the load attachment devices relative to the mast.
Abstract:
A tubulars storage device (1) for storing a plurality of tubulars (2a-2b) which has a slot forming a path of displacement for tubulars allowing to place tubulars at respective storage positions distributed along the slot as well as removal of said tubulars from the slot. The device includes a rotary latch members shaft (21), which is mounted' substantially parallel to the slot, and a drive (25) connected to the rotary latch members shaft, said drive being adapted to effect controlled angular rotation of the latch members shaft. A plurality of latch members (26-29) are mounted on the latch members shaft so as to rotate with the latch members shaft and are arranged at spaced apart locations along the latch members shaft.
Abstract:
A method and vessel for installing an expandable tubular in a subsea wellbore, wherein said expandable tubular is assembled from expandable tubular segments, said expandable tubular being adapted to be expanded diametrically when positioned in said wellbore by means of expansion tooling, wherein a multitude of expandable tubular segments are provided, and wherein use is made of a surface vessel, said vessel comprising: - at least one assembly station adapted for the assembly of at least one intermediate tubular assembly by interconnection of multiple expandable tubular segments, - an intermediate tubular assembly suspension storage device adapted for storage of one or more intermediate tubular assemblies, said intermediate tubular assemblies being suspended from the vessel into the water by said storage device, - a guide and handling system for intermediate tubular assemblies, said guide and handling system having an entry and an exit, said entry being spaced from said exit, the entry being arranged and adapted to receive a suspended intermediate tubular assembly from the storage device, the system being adapted for the upward feeding of said intermediate tubular assembly from the entry towards a top of the system, and then downwards to the exit, said system further being adapted for launching the intermediate tubular assembly downward from said exit into the water towards and into the wellbore, - a connecting station adapted for connecting an intermediate tubular assembly to another intermediate tubular assembly.
Abstract:
A marine pipeline installation system for laying an offshore pipeline and/or installing a subsea riser, the system at least allowing to carry out the reel lay method, wherein the system comprises : one or more storage reels (8) for storage of pipeline (11), a pipeline launch tower (20), a pipeline guide (27) at an elevated position for guiding said pipeline along said tower, one or more tensioners (40,50), each tensioner comprising a tensioner frame and multiple tracks supported by said tensioner frame (41,51), said tracks being adapted for engaging the pipeline and supporting at least part of the weight of the launched pipeline, the tensioner frame (41,51) being supported by said tower via an associated support assembly. The support assembly is adapted to allow for displacement of the tensioner frame (41,51) between an active position, wherein the pipeline launch trajectory extends through the tensioner frame (41,51) between the tracks, and a retracted and non-operable position.