NL2026600B1 - A Gangway, vessel, offshore structure and methods - Google Patents

A Gangway, vessel, offshore structure and methods Download PDF

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Publication number
NL2026600B1
NL2026600B1 NL2026600A NL2026600A NL2026600B1 NL 2026600 B1 NL2026600 B1 NL 2026600B1 NL 2026600 A NL2026600 A NL 2026600A NL 2026600 A NL2026600 A NL 2026600A NL 2026600 B1 NL2026600 B1 NL 2026600B1
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NL
Netherlands
Prior art keywords
boom
gangway
transfer deck
actuator
unit
Prior art date
Application number
NL2026600A
Other languages
Dutch (nl)
Inventor
Paulus Maria Krutzen Martijn
Original Assignee
Ampelmann Holding B V
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ampelmann Holding B V filed Critical Ampelmann Holding B V
Priority to NL2026600A priority Critical patent/NL2026600B1/en
Priority to PCT/NL2021/050597 priority patent/WO2022071804A1/en
Application granted granted Critical
Publication of NL2026600B1 publication Critical patent/NL2026600B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/14—Arrangement of ship-based loading or unloading equipment for cargo or passengers of ramps, gangways or outboard ladders ; Pilot lifts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B2017/0072—Seaway compensators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/14—Arrangement of ship-based loading or unloading equipment for cargo or passengers of ramps, gangways or outboard ladders ; Pilot lifts
    • B63B2027/141—Arrangement of ship-based loading or unloading equipment for cargo or passengers of ramps, gangways or outboard ladders ; Pilot lifts telescopically extendable

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

A gangway, comprising a transfer deck configured to be connected to a base, and an elongate boom unit extending in a main boom direction and configured to provide a boom walkway along the main boom direction. The gangway also comprises a boom actuator Which connects the boom unit to the transfer deck and is configured to actuate the boom unit With respect to the transfer deck. The boom actuator is configured to at least translate the boom unit With respect to the transfer deck.

Description

P127986NL00 Title: A Gangway, vessel, offshore structure and methods The invention relates to a gangway, comprising a transfer deck configured to be connected to a base, an elongate boom unit extending in a main boom direction and configured to provide a boom walkway along the main boom direction, and a boom actuator which connects the boom unit to the transfer deck and is configured to actuate the boom unit with respect to the transfer.
Gangways are generally known, e.g. as a motion compensated gangway, for transferring a load/person from a vessel to an object such as an offshore construction, or vice versa. The transfer deck is configured to be connected to a base that may be configured to be mounted on a vessel. The transition deck enables access onto the bridge from a vessel-fixed access point. The transition deck may further be configured to be movable, e.g. including actuators such as hydraulic pistons, to compensate for relative motion between the base or vessel and an object to or from which the load/person can be transferred. Said relative motion may for example result from waves or rolling, pitching and/or yawing motion of a vessel or boat floating on the water.
Further, the elongate boom unit extends in a main boom direction and is configured to provide a boom walkway along the main boom direction. Telescopic gangways may comprise an elongate boom unit that is telescopic typically having a tip that may be held, during operation of the gangway, such as a motion compensated gangway, in close proximity of an object such as an offshore construction to or from which a load or a person has to be transferred.
A telescopic gangway comprises a first and second gangway part, for example a telescoping and main boom, which are telescopable with respect to each other in the main boom direction, e.g. by rolling in and out, to adjust a longitudinal length of the telescopic gangway. Within the context of this application the term telescopable is meant to be construed as being movable, such as being able to move in and out of each other and/or with respect to each other along said main boom direction.
The known gangway may further comprise a boom actuator which connects the elongate boom unit to the transfer deck. The boom actuator is configured to actuate the boom unit with respect to the transfer deck, especially to induce a tilting or luffing movement of the boom unit relative to the transfer deck around a tilting or luffing axis that extends in a mainly horizontal plane generally transverse to the main boom direction.
The known gangway may further perform a slewing movement by tilting the bridge platform with respect to the base around a slewing axis that 1s generally transverse to the horizontal plane.
Such a known gangway may thus have three degrees of freedom or three actuated axes, viz. a translation of the telescoping boom unit along the main boom direction, a rotation of the telescoping boom unit along the luffing axis and a rotation of the bridge platform along the slewing axis. Generally, the known gangway may be actuated using one, two or three of said degrees of freedom to compensate for relative motion between the base or vessel and an object to or from which a load/person is to be transferred.
Motion compensated gangways per se, such as for compensating for vessel motions when transferring personnel and/or loads are known in the art. For example from the Ampelmann® system as disclosed in general in NL1027103, or systems disclosed in WO2012/138227 and WO2013/10564.
Patent publication NL1027103 discloses a vessel with a Stewart type construction for compensating motions of a ship. The construction comprises a transition deck, borne on six hydraulic cylinders, and motion sensors. During use, with the aid of the sensors, the motions of the vessel are measured. With the aid of these measurements, the orientation and/or position of the cylinders is driven continuously so that the transition deck remains approximately stationary relative to the fixed world. A luffing gangway 1s connected to the transition deck. In this manner, motions of the vessel are compensated and for instance people or loads can be transferred from the vessel onto a stationary offshore construction, or vice versa.
An object of the invention is to provide a gangway that offers additional operational ability.
Thereto, according to an aspect of the invention, a telescopic gangway 1s provided, comprising a transfer deck configured to be connected to a base, an elongate boom unit extending in a main boom direction and configured to provide a boom walkway along the main boom direction, and a boom actuator which connects the boom unit to the transfer deck and is configured to actuate the boom unit with respect to the transfer deck, wherein the boom actuator is configured to at least translate the boom unit with respect to the transfer deck.
By configuring the boom actuator to at least translate the boom unit with respect to the transfer deck vertical and/or horizontal motion compensation can be added thus providing additional operational ability.
As an example, by configuring the boom actuator to translate the boom unit with respect to the transfer deck in a first translation direction which extends at an angle with, in particular is substantially orthogonal to, the main boom direction, a vertical height adjustment of the gangway can be realized, e.g. stepless, thus reducing a static gangway angle and increasing the operational ability. The first translation direction may extend at an angle with, in particular is substantially orthogonal to a plane in which the boom walkway extends.
As another example, the boom actuator may be configured to translate the boom unit with respect to the transfer deck in a second translation direction which extends substantially parallel with the main boom direction, such that a gangway surge compensation can be obtained, reducing the telescopic motion of the elongate boom unit as part of the motion compensation may then be performed by the translation of the boom actuator, thus also increasing the operational ability.
Motion compensation may be performed so as to compensate for relative motion between a base on which the gangway has been mounted and an object to or from which a load/person is to be transferred.
In principle, however, the boom actuator may not be configured to perform motion compensation.
Advantageously, the boom actuator may be configured to translate the boom unit with respect to the transfer deck in at least two different directions, e.g. in the first and second translation direction, which extend at an angle to each other, in particular including at least two mutually orthogonal directions. However, the boom actuator may be configured to enable a translation in a single translation direction only.
In an embodiment, the boom actuator is configured to rotate the boom unit with respect to the transfer deck about a first rotation axis which preferably extends substantially orthogonal to the main boom direction, and preferably parallel to a plane in which the boom walkway extends, thus enabling to perform a luffing operation. Preferably, the first rotation axis extends substantially orthogonal to at least one direction, preferably at least two directions, in particular two orthogonal directions, in which direction or directions the boom actuator is configured to translate the boom unit with respect to the transfer deck.
Advantageously, the boom actuator is configured to perform, at least contribute to, motion compensation, in particular heave compensation and/or surge compensation, for the boom unit with respect to the transfer deck and/or the base.
Preferably, the gangway, in particular the boom actuator, is configured to partially resist movement of the boom unit with respect to the transfer deck, in particular substantially resist one or more, preferably each, of the following movements of the boom unit with respect to the transfer deck: translation in a direction orthogonal to the main boom direction and parallel to a plane in which the boom walkway extends, rotation about an axis which is parallel to the main boom direction, and rotation about an axis which is orthogonal to a plane in which the boom 5 walkway extends, wherein for example the boom actuator is provided with a sectional hinging mechanism which is configured to resist said one or more movements while allowing one or more other movements of the boom unit with respect to the transfer deck. By providing the sectional hinging mechanism or similar mechanism desired movements may be enabled while undesired movements may be counteracted. Alternatively, the gangway may be implemented without a mechanism to resist at least one of the above movements.
In particular, the boom actuator may be configured to bring the boom unit to a state in which the main boom direction extends substantially orthogonal to a plane in which a the transfer deck extends, and/or in which the main boom direction extends substantially parallel to a slewing axis of the transfer deck with respect to the base, e.g. by providing a large luffing angle range, thereby providing an upward and/or downward stowing state thereby minimizing a required stowing footprint and stowing provisions on the vessel.
Also, the transfer deck may be configured to be movably connected to the base, in particular being rotatable with respect to the base about a slewing axis which preferably extends substantially orthogonal to a plane in which the transfer deck extends, thereby enabling to perform a slewing operation.
Further, the boom unit may be implemented as a telescopic boom unit which 1s telescopable along the main boom direction, the boom unit in particular comprising a first boom element which is connected to the transfer deck by the boom actuator, and a second boom element which is slidably connected to the first boom element, in particular slidable along the main boom direction to extend beyond a distal end of the first boom element. The boom unit may be configured to telescopically move for motion compensation. Alternatively, the boom unit may be implemented without a telescopically moving portion.
Preferably, the gangway comprises a bridging unit configured to provide a connecting walkway which extends from the transfer deck to the boom walkway, in particular to provide the connecting walkway in various positions of the boom unit with respect to the transfer deck, the bridging unit preferably comprising a first bridging element connected to the transfer deck and a second bridging element connected to the boom unit, wherein the first and second bridging elements are movably connected to each other, in particular slidably connected to each other to form a telescopable bridging unit, thereby facilitating that a load and/or person is transferred from the transfer deck to the elongate boom unit or vice versa.
In an exemplary implementation, the boom actuator comprises a set of linear actuators which each connect the boom unit to the transfer deck along a respective actuation path, wherein preferably the set comprises at least three linear actuators whose respective actuation paths are mutually different when viewed in a viewing direction which is orthogonal to the main boom direction and parallel to a plane in which the boom walkway extends, wherein preferably at least one of said actuation paths includes an angle with at least one other of said actuation paths when viewed in said viewing direction. By applying actuators having conventional lengths, a large luffing angle range may be realized thereby further increasing the operational ability.
It is noted that the gangway may thus have five degrees of freedom or five actuated axes, viz. a translation of the telescoping boom unit along the main boom direction, a rotation of the bridge platform along the slewing axis, and a translation along each of the linear actuators, e.g. a translation along a first linear actuator, a translation along a second linear actuator and a translation along a third linear actuator. Then, the functionality of five independently controlled motions is provided by actuating the five actuated axes, preferably according to a kinematic decomposition into luffing, slewing, telescoping, surge and heave. However, at least some of the actuated axes may be absent, e.g. the telescoping axis and/or slewing axis, or may be implemented in another fashion. If both the telescoping axis and the slewing axis are omitted, the gangway has three degrees of freedom.
The invention also relates to a vessel provided with a gangway.
Further, the invention relates to an offshore structure provided with a gangway.
Also, the invention relates to a method of gangway motion compensation, in particular heave and/or surge compensation, comprising: providing a gangway according to any of the preceding claims; and at least translating, and optionally rotating, the boom unit with respect to the transfer deck by the boom actuator.
As an example, the method may comprise, for surge compensation, a step of telescoping the boom unit while at the same time translating the boom unit with respect to the transfer deck in a direction which is substantially parallel to the main boom direction.
The invention additionally relates to a method of transferring an object and/or person between a vessel and an offshore structure, comprising a step of positioning the gangway of the vessel and/or offshore structure to provide a transfer path between the vessel and the offshore structure; a step of performing motion compensation using the gangway of the vessel and/or offshore structure to at least partially compensate relative motion between the vessel and the offshore structure; and a step of transferring the object and/or person along the gangway while performing the motion compensation.
The invention will be further elucidated on the basis of exemplary embodiments which are represented in the drawings. The exemplary embodiments are given by way of non-limitative illustration of the invention.
In the drawings: Fig. 1 shows a schematic perspective view of a gangway according to the invention; Fig. 2 shows a schematic side view of a gangway as shown in Fig. 1; Fig. 3A shows a schematic side view of the gangway as shown in Fig. 2 in a first position of a telescopic boom with respect to a main boom; Fig. 3B shows a schematic side view of the gangway as shown in Fig. 3A in a second position of the telescopic boom with respect to the main boom;
Fig. 4A shows a schematic side view of the gangway as shown in Fig. 2 wherein the boom unit is in a downward luffing position;
Fig. 4B shows a schematic side view of the gangway as show in Fig. 4A wherein the boom unit is in an upward luffing position;
Fig. 5A shows a schematic side view of the gangway as shown in Fig. 2 in a first position of a first bridging element with respect to a second bridging element;
Fig. 5B shows a schematic side of the gangway as shown in Fig. 5A in a second position of the first bridging element with respect to the second bridging element;
Fig. 6A shows a schematic side view of the gangway as shown in Fig. 2 wherein the boom unit is in an upward heave position;
Fig. 6B shows a schematic side of the gangway as shown in Fig. 6A wherein the boom unit is in a downward heave position;
Fig. 7A shows a schematic side view of the gangway as shown in Fig. 2 in a downward vertical position;
Fig. 7B shows a schematic side view of the gangway as shown in Fig. 7A in an upward vertical position; Fig. 8 shows a schematic view of a vessel according to an aspect of the invention;
Fig. 9 shows a schematic view of an offshore construction according to an aspect of the invention; Fig. 10 shows a flow chart of a method according to a first embodiment of the invention; Fig. 11 shows a flow chart of a method according to a second embodiment of the invention.
In the figures identical or corresponding parts are represented with the same reference numerals. The drawings are only schematic representations of embodiments of the invention, which are given by manner of non-limited examples.
Fig. 1 shows a schematic perspective view of a motion compensated gangway 10 according to the invention. The gangway 10 comprises a transfer deck TD configured to be connected to a base 20. Said base may be mounted on a vessel. The transfer deck TD enables access onto a bridging unit RU from a vessel-fixed access point. The gangway 10 further comprises an elongate boom unit BU which is configured to provide a boom walkway BW, such as a walkboard or walkplank, to facilitate transfer of persons and/or goods along the elongate boom unit BU. The boom walkway BW and the elongate boom unit BU extend in a main boom direction d2, as e.g.
shown in Fig. 2. In the shown embodiment, the elongate boom unit BU has a main boom MB and a telescopic boom TB. The gangway 10 also comprises a boom actuator BA connecting the boom unit BU to the transfer deck TD and being configured to actuate or position the boom unit BU with respect to the transfer deck TD. The boom actuator BA is also configured to at least translate the boom unit BU with respect to the transfer deck TD.
As shown in Fig. 1, the boom actuator BA comprises a set of actuators L1, L2 and L3, e.g. hydraulic pistons, linear actuators, cylinder actuator or electric actuators, which each connect the boom unit BU to the transfer deck TD. These actuators L1, L2 and L3 can be configured to compensate for relative motion between the vessel on which the transfer deck TD is mounted and an object to or from which persons and/or loads can be transferred. Said relative motion may for example result from waves or rolling, pitching, and/or yawing motion of the vessel on water. Additionally, the boom actuator BA comprises a sectional hinging mechanism H.
As described above, the boom unit BU of the shown embodiment is formed as a telescopic boom unit comprising a first, main boom element MB, which is connected to the transfer deck TD by the boom actuator BA, and a second, telescopic boom element TB which is slidebly connected to the main boom element MB. It is noted, however, that the boom unit may be implemented without a telescopically moving portion.
The gangway 10 further comprises a bridging unit RU which is configured to provide a connecting walkway CW which extends from the transfer deck TD to the boom walkway BW, in particular to provide the connecting walkway CW in various positions of the boom unit BU with respect to the transfer deck TD. In the shown embodiment, the bridging unit RU comprises a first bridging element ME connected to the transfer deck TD and a second bridging element TE connected to the boom unit BU, wherein the first and second bridging elements ME, TE are movably connected to each other, in particular slidably connected to each other to form a telescopable bridging unit RU.
The gangway 10 may be referred to as a five degree of freedom (DoF) gangway or as a gangway comprising 3 DoF luffing, which has the functionality of five independently controlled motions by actuating the actuated axes L1, L2 and L3 according to a kinematic decomposition into: luffing, slewing, telescoping, surge and heave.
Fig. 2 shows a schematic side view of a gangway 10 according to the invention. The gangway 10 in Fig. 2 shows that the boom actuator BA may be configured to translate the boom unit BU with respect to the transfer deck TD in at least two different directions d1 and d2, which extend at an angle to each other, in particular including at least two mutually orthogonal directions d1 and d2. The boom actuator BA may be configured to translate the boom unit BU with respect to the transfer deck TD in a first translation direction d1 which extends at a non-zero angle with, in particular is substantially orthogonal to, the main boom direction d2. The first translation direction d1 may extend at a non-zero angle with, in particular may be substantially orthogonal to a plane in which the boom walkway BW extends.
The boom actuator BA may further be configured to translate the boom unit BU with respect to the transfer deck TD in a second translation direction d2 which extends substantially parallel with the main boom direction d2. The boom actuator BA may be configured to rotate the boom unit BU with respect to the transfer deck TD about a first rotation axis rl which preferably extends substantially orthogonal to the main boom direction d2, and preferably parallel to a plane in which the boom walkway BW extends. This angle of rotation of the bridge about a vertical axis r1 can be referred to as slewing.
The first rotation axis r1 may extend substantially orthogonal to at least one direction d1 or d2, preferably at least two directions d1, d2, in particular two orthogonal directions d1, d2, in which direction or directions dl, d2 the boom actuator BA can be configured to translate the boom unit BU with respect to the transfer deck TD.
The boom actuator BA may be configured to perform, at least contribute to, motion compensation, in particular heave compensation and/or surge compensation, for the boom unit BU with respect to the transfer deck TD and/or the base.
The gangway 10, in particular the boom actuator BA can further be configured to partially resist movement of the boom unit BU with respect to the transfer deck TD, in particular may substantially resist one or more, preferably each, of the following movements of the boom unit BU with respect to the transfer deck TD; translation in a direction orthogonal to the main boom direction d2 and parallel to a plane in which the boom walkway BW can extent; rotation about an axis which may be parallel to the main boom direction d2; and rotation about an axis which is orthogonal to a plane in which the boom walkway BW can extent, wherein for example the boom actuator BA can be provided with the sectional hinging mechanism H which may be configured to resist said one or more movements while allowing one or more other movements of the boom unit BU with respect to the transfer deck TD.
Further, the transfer deck TD may be configured to be movably connected to the base, in particular being rotatable with respect to the base about a slewing axis r2 which preferably extends substantially vertical or substantially orthogonal to a plane in which the transfer deck TD may extend.
The boom actuator BA may comprise the set of linear actuators L1, L2, L3 which each connect the boom unit BU to the transfer deck TD along a respective actuation path.
The set may preferably comprise at least three linear actuators L1, L2, L3 whose respective actuation paths are mutually different when viewed in a viewing direction which is orthogonal to the main boom direction d2 and parallel to a plane in which the boom walkway BW extends, wherein preferably at least one of said actuation paths may include a non-zero angle with at least one other of said actuation paths when viewed in said viewing direction.
Specifically, the actuators L1, L2 and L3 can be geometrically arranged such that the mid actuator(s) L2 longitudinal axis are not parallel to either the top actuator(s) L1 longitudinal axis or the bottom actuator(s) L3 longitudinal axis.
Further, the actuators may be arranged such that the top actuator(s) L1 longitudinal axis does not coincide with the bottom actuator(s) longitudinal axis.
The linear actuators L1, L2, L3 each have first and second ends, opposite to each other, that are connected to the boom unit BU and the transfer deck TD, respectively.
In the shown embodiment, the boom unit BU is provided with a connector frame CF mounted to a proximal end of the boom unit BU and having first mounting points MP1 to which first ends E1 of the linear actuators are mounted.
Similarly, in the shown embodiment, the transfer deck TD is provided with a mounting frame MF having mounting points MP2 to which second ends E2 of the linear actuators are mounted.
During operation, the linear actuators may be controlled to perform a respective linear movement so as to actuate such as translate and/or tilt the boom unit BU relative to the transfer deck TD.
The top actuator(s) L1 may include an array of two, three or more top actuators Ll, e.g. arranged mainly parallel and next to each other in said viewing direction.
Similarly, the mid actuator(s) L2 may include an array of multiple actuators L2 arranged mainly parallel and next to each other in said viewing direction.
Also the bottom actuator(s) L3 may include an array of multiple actuators L2 arranged mainly parallel and next to each other in said viewing direction.
Alternatively, in principle, a single top actuator L1, a single mid actuator L2 and/or a single bottom actuator L3 may be applied.
Further, the set of linear actuators may include further actuators, in addition to the three linear actuators L1, L2, L3. Additionally, a vessel may be provided with a gangway according to the invention, wherein the transfer deck TD may be connected to a base 20 of the vessel, in particular a base 20 which is fixed to a main body of the vessel, wherein preferably the transfer deck TD is non-translatably connected to the base 20. Furthermore, an offshore structure may be provided with a gangway according to the invention wherein the transfer deck TD may be connected to a base 20 of the offshore structure, in particular a base 20 which is fixed to a main body of the offshore structure, wherein preferably the transfer deck TD is non-translatably connected to the base 20. Fig. 3A and B show a schematic side view of a gangway 10 according to the invention in a first and second position of the telescopic boom TB with respect to the main boom MB. The boom unit BU is a telescopic boom unit BU which is telescopable along the main boom direction d2, the boom unit BU in particular comprises a first boom element MB which can be connected to the transfer deck TD by the boom actuator BA, and a second boom element TB which may be slidably connected to the first boom element MB, in particular slidable along the main boom direction d2 to extend beyond a distal end of the first boom element MB.
The second element TB, the telescopic boom, rolls in and out of the first boom element MB, the main boom, in order to vary the length of the whole gangway 10 enabling motion compensated hoisting from the telescopic boom TB. In motion compensated state, the motions of a vessel dictate the motions of the gangway bridge 10 in a number of directions. A relative telescoping motion between the telescopic boom TB and the main boom MB can be one of these motions. Another motion is the tilting of the gangway over its longitudinal axis with respect to the horizontal plane perpendicular to the gravity vector, which is the gangway angle motion.
Fig. 4A and B show a schematic side view of a gangway according to the invention, where the boom unit is in a downward and upward luffing position. The gangway 10 is a five degree of freedom gangway which comprises five actuated axes. There are the top luffing actuator(s) L1, mid luffing actuator(s) L2 and bottom luffing actuator(s) L3. The actuators L1, L2 and L3 can increase or decrease the non-zero angle between the bridge BU and the horizontal plane of the access point. The actuators L1, L2 and L3 have conventional lengths, yet they can advantageously provide a large luffing angle, which increases the operational ability.
Fig. 5A and B show a schematic side view of a gangway 10 according to the invention in a first position and second position of the first bridging element ME with respect to the second bridging element TE.
The gangway 10 comprises a bridging unit RU which can be configured to provide a connecting walkway CW, such as a walkingboard or walkingplank, which extends from the transfer deck TD to the boom walkway BW, in particular to provide the connecting walkway CW in various positions of the boom unit BU with respect to the transfer deck TD. The bridging unit RU may preferably comprise the first bridging element ME connected to the transfer deck TD and the second bridging element TE connected to the boom unit BU, wherein the first and second bridging elements ME, TE can be movably connected to each other, in particular slidably connected to each other to form a telescopable bridging unit RU.
Further, the gangway bridge RU comprises a transfer deck TD that enables access onto the bridge from the vessel-fixed access point. Also, the gangway bridge RU may comprise a slideway that enables access onto the bridge from the transfer deck TD or vessel-fixed access point. The slideway may comprise two structural bridge elements: the main element ME and the telescopic element TE. The telescopic element TE rolls in and out of the main element ME in order to vary the length of the whole slideway. Operational ability can be increased by reducing the telescoping motion between the telescoping boom TB and the main boom MB. This can be achieved since part of the motion is taken by the telescoping motion between the slideway telescopic element TE and the main element ME.
Fig. 6A and B show a schematic side view of a gangway according to the invention, where the boom unit is in an upward and downward heave position. Gangway heave compensation is attained, which reduces the gangway angle motion. Further, the stepless gangway vertical height adjustment, reduces the static gangway angle. Both characteristics separate and/or in combination may increase the operational ability.
Fig. 7A and B show a schematic side view of a gangway 10 according to the invention in a downward and upward vertical position. As can be seen in Fig. 7, the boom actuator BA is configured to bring the boom unit BU to a state in which the main boom direction d2 extends substantially orthogonal to a plane in which the transfer deck TD extends,
and/or in which the main boom direction d2 can extent substantially parallel to a slewing axis r2 of the transfer deck TD with respect to the base. The vertical position of the booms is enabled by the large luffing angle range. The vertical position can be used to stow the gangway 10. This vertical stowing minimizes the stowing footprint and the stowing provisions on the vessel.
Figure 8 shows a schematic view of a vessel 300 according to an aspect of the invention. The vessel 300 is provided with a gangway 310 having a transfer deck 320, an elongate boom unit BU and a boom actuator BA as described above. The vessel 300 also has a base 330 that is fixed to a main body 340 of the vessel 300. The transfer deck 320 is connected to the base 330. The transfer deck 320 may be arranged to rotate around a mainly vertical axis relative to the base 330. Further, the transfer deck 320 is preferably non-translatably connected to the base 330. It is noted that the base 330 can be associated in another manner to the vessel 300, e.g. via a movable connection.
Figure 9 shows a schematic view of an offshore structure 400 according to an aspect of the invention. The offshore structure 400 is provided with a gangway 410 having a transfer deck 420, an elongate boom unit BU and a boom actuator BA as described above. The offshore structure 400 also has a base 430 that is fixed to a main body or platform 440 of the offshore structure 400. The transfer deck 420 is connected to the base 430. The transfer deck 420 may be arranged to rotate around a mainly vertical axis relative to the base 430. Further, the transfer deck 420 is preferably non-translatably connected to the base 430. It is noted that the base 430 can be associated in another manner to the vessel 400, e.g. via a movable connection.
Fig. 10 shows a flow chart of a method according to the invention. The method 100 is used for gangway motion compensation, in particular heave and/or surge compensation, and comprises a step of providing 110 a gangway according to the invention; and at least translating 120, and optionally rotating 130, the boom unit BU with respect to the transfer deck TD by the boom actuator BA.
The boom unit BU may further be configured according to the invention, wherein for surge compensation the method may comprise the step of telescoping the boom unit BU while at the same time translating the boom unit BU with respect to the transfer deck TD in a direction which is substantially parallel to the main boom direction d2. Fig. 11 shows a flow chart of a method according to the invention.
The method is used for transferring an object and/or person between a vessel and an offshore structure, and may comprise the steps of: providing 210 a vessel and/or an offshore structure; positioning 220 the gangway of the vessel and/or offshore structure to provide a transfer path between the vessel and the offshore structure; performing 230 motion compensation according to a method according to the invention using the gangway of the vessel and/or offshore structure to at least partially compensate relative motion between the vessel and the offshore structure; and transferring 240 the object and/or person along the gangway while performing the motion compensation.
Various variations are possible.
It will be clear to the skilled person that the invention is not limited to the exemplary embodiment represented here.
Many variations are possible.
Such variations shall be clear to the skilled person and are considered to fall within the scope of the invention as defined in the appended claims.

Claims (19)

ConclusiesConclusions 1. Loopplank, omvattende: - een transferdek ingericht om te zijn verbonden met een basis; - een langwerpige boomeenheid die zich uitstrekt in een hoofdboom- richting en die is ingericht om te voorzien in een boomloopbrug langs de hoofdboom-richting; en - een boomactuator die de boomeenheid met het transferdek verbindt en die is ingericht om de boomeenheid ten opzichte van het transferdek aan te drijven, met het kenmerk dat de boomactuator is ingericht om de boomeenheid tenminste te transleren ten opzichte van het transferdek.A gangway comprising: - a transfer deck adapted to be connected to a base; - an elongate boom unit extending in a main boom direction and adapted to provide a boom walkway along the main boom direction; and - a boom actuator connecting the boom unit to the transfer deck and arranged to drive the boom unit relative to the transfer deck, characterized in that the boom actuator is arranged to at least translate the boom unit relative to the transfer deck. 2. Loopplank volgens conclusie 1, waarbij de boomactuator is ingericht om de boomeenheid ten opzichte van het transferdek te transleren in tenminste twee verschillende richtingen die zich onder een hoek van elkaar uitstrekken, in het bijzonder omvattende tenminste twee onderling orthogonale richtingen.Gangway according to claim 1, wherein the boom actuator is adapted to translate the boom unit relative to the transfer deck in at least two different directions extending at an angle from each other, in particular comprising at least two mutually orthogonal directions. 3. Loopplank volgens conclusie 1 of 2, waarbij de boomactuator is ingericht om de boomeenheid ten opzichte van het transferdek te transleren in een eerste translatie-richting die zich uitstrekt onder een hoek met, in het bijzonder in hoofdzaak orthogonaal aan, de hoofdboom-richting.Gangway according to claim 1 or 2, wherein the boom actuator is arranged to translate the boom unit relative to the transfer deck in a first translation direction extending at an angle to, in particular substantially orthogonal to, the main boom direction . 4. Loopplank volgens conclusie 3, waarbij de eerste translatie- richting zich uitstrekt onder een hoek met, in het bijzonder in hoofdzaak orthogonaal is aan een vlak waarin de boomloopbrug zich uitstrekt.A gangway according to claim 3, wherein the first translation direction extends at an angle to, in particular is substantially orthogonal to a plane in which the tree gangway extends. 5. Loopplank volgens een van de voorgaande conclusies, waarbij de boomactuator is ingericht om de boomeenheid ten opzichte van het transferdek te transleren in een tweede translatie-richting die zich in hoofdzaak parallel aan de hoofdboom-richting uitstrekt.A gangway according to any one of the preceding claims, wherein the boom actuator is arranged to translate the boom unit relative to the transfer deck in a second translation direction extending substantially parallel to the main boom direction. 6. Loopplank volgens een van de voorgaande conclusies, waarbij de boomactuator is ingericht om de boomeenheid ten opzichte van het transferdek te roteren om een eerste rotatie-as die zich bij voorkeur orthogonaal ten opzichte van de hoofdboom-richting uitstrekt, en bij voorkeur parallel is aan een vlak waarin de boomloopbrug zich uitstrekt.A gangway according to any one of the preceding claims, wherein the boom actuator is arranged to rotate the boom unit relative to the transfer deck about a first axis of rotation which is preferably orthogonal to the main boom direction, and preferably parallel on a plane into which the tree walkway extends. 7. Loopplank volgens conclusie 6, waarbij de eerste rotatie-as zich in hoofdzaak orthogonaal uitstrekt aan tenminste een richting, bij voorkeur tenminste twee richtingen, in het bijzonder twee orthogonale richtingen, in welke richting of richtingen de boomactuator is ingericht om de boomeenheid ten opzichte van het transferdek te transleren.A gangway according to claim 6, wherein the first axis of rotation extends substantially orthogonally to at least one direction, preferably at least two directions, in particular two orthogonal directions, in which direction or directions the boom actuator is arranged to rotate the boom unit relative to the boom unit. of the transfer deck. 8. Loopplank volgens een van de voorgaande conclusies, waarbij de boomactuator is ingericht om uit te voeren, tenminste bij te dragen aan, bewegings-compensatie, in het bijzonder dein (heave) en/of schommel (surge) compensatie van de boomeenheid ten opzichte van het transferdek en/of de basis.A gangway according to any one of the preceding claims, wherein the boom actuator is arranged to perform, at least contribute to, motion compensation, in particular heave and/or swing compensation of the boom unit relative to of the transfer deck and/or the base. 9. Loopplank volgens een van de voorgaande conclusies, waarbij de loopplank, in het bijzonder de boomactuator, is ingericht om gedeeltelijk weerstand te bieden aan beweging van de boomeenheid ten opzichte van het transferdek, in het bijzonder in hoofdzaak weerstand bieden aan een of meer, bij voorkeur elk, van de volgende bewegingen van de boomeenheid ten opzichte het transferdek: - translatie in een richting orthogonaal aan de hoofdboom-richting en parallel aan een vlak waarin de boomloopbrug zich uitstrekt; - rotatie om een as welke parallel is aan de aan de hoofdboom- richting; en - rotatie om een as welke orthogonaal is aan een vlak waarin de boomloopbrug zicht uitstrekt,A gangway according to any one of the preceding claims, wherein the gangway, in particular the boom actuator, is adapted to partially resist movement of the boom unit relative to the transfer deck, in particular to substantially resist one or more, preferably any of the following movements of the boom unit relative to the transfer deck: translation in a direction orthogonal to the main boom direction and parallel to a plane in which the boom gangway extends; rotation about an axis parallel to the main boom direction; and - rotation about an axis orthogonal to a plane into which the boom walkway extends, waarbij bijvoorbeeld de boomactuator voorzien is van een sectioneel scharniermechanisme dat is ingericht om weerstand te bieden aan genoemde een of meer bewegingen terwijl een of meer andere bewegingen van de boomeenheid ten opzichte van het transferdek toe worden gestaan.for example, the boom actuator comprising a sectional hinge mechanism adapted to resist said one or more movements while permitting one or more other movements of the boom unit relative to the transfer deck. 10. Loopplank volgens een van de voorgaande conclusies, waarbij de boomactuator is Ingericht om de boomeenheid in een toestand te brengen waarin de hoofdboom-richting zich in hoofdzaak orthogonaal aan een vlak uitstrekt waarin het transferdek zich uitstrekt, en/of waarin de hoofdboom- richting zich in hoofdzaak parallel aan een zwenkings-as (slewing) van het transferdek uitstrekt ten opzichte van de basis.A gangway according to any one of the preceding claims, wherein the boom actuator is arranged to bring the boom unit into a state in which the main boom direction extends substantially orthogonal to a plane in which the transfer deck extends, and/or in which the main boom direction extends substantially parallel to a slewing axis of the transfer deck with respect to the base. 11. Loopplank volgens een van de voorgaande conclusies, waarbij het transferdek is ingericht om beweegbaar te zijn verbonden met de basis, in het bijzonder om roteerbaar te zijn ten opzichte van de basis om een zwenkings-as (slewing) die zich bij voorkeur orthogonaal aan een vlak uitstrekt waarin het transferdek zich uitstrekt.A gangway according to any one of the preceding claims, wherein the transfer deck is arranged to be movably connected to the base, in particular to be rotatable relative to the base about a pivot axis (slewing) which is preferably orthogonal to the base. extends a plane into which the transfer deck extends. 12. Loopplank volgens een van de voorgaande conclusies, waarbij de boomeenheid een telescoperende boomeenheid is die telescopeerbaar is langs de hoofdboom-richting, waarbij de boomeenheid in het bijzonder een eerste boomelement omvat die is verbonden met het transferdek door de boomactuator, en een tweede boomelement die schuifbaar verbonden is met het eerste boomelement, in het bijzonder schuifbaar is langs de hoofdboom- richting om zich voorbij een distaal uiteinde van het eerste boomelement uit te strekken.A gangway according to any one of the preceding claims, wherein the boom unit is a telescoping boom unit that is telescopic along the main boom direction, the boom unit in particular comprising a first boom element connected to the transfer deck by the boom actuator, and a second boom element slidably connected to the first boom element, in particular slidable along the main boom direction to extend beyond a distal end of the first boom element. 13. Loopplank volgens een van de voorgaande conclusies, waarbij de loopplank een overbruggingseenheid omvat die is ingericht om te voorzien in een verbindende loopbrug die zich uitstrekt vanaf het transferdek naar de boomloopbrug, in het bijzonder om de verbindende loopbrug te voorzien in verschillende posities van de boomeenheid ten opzichte van het transferdek, waarbij de overbruggings-eenheid bij voorkeur een eerste overbruggings-element verbonden met het transferdek omvat en een tweede overbruggings-element verbonden met de boomeenheid, waarbij het eerste en tweede overbruggings-element beweegbaar verbonden zijn met elkaar, in het bijzonder schuifbaar verbonden met elkaar om een telescoperende overbruggings-eenheid te vormen.A gangway according to any one of the preceding claims, wherein the gangway comprises a bridging unit arranged to provide a connecting gangway extending from the transfer deck to the boom gangway, in particular to provide the connecting gangway in different positions of the boom unit relative to the transfer deck, the bridging unit preferably comprising a first bridging element connected to the transfer deck and a second bridging element connected to the boom unit, the first and second bridging elements being movably connected to each other, in particularly slidably connected together to form a telescoping bridging unit. 14. Loopplank volgens een van de voorgaande conclusies, waarbij de boomactuator een set van lineaire actuatoren omvat die elk de boomeenheid met het transferdek verbinden langs een respectief aandrijfpad, waarbij bij voorkeur de set tenminste drie lineaire actuatoren omvat wiens respectieve aandrijfpaden onderling verschillen wanneer bekeken in een kijkrichting die orthogonaal is aan de hoofdboom-richting en parallel aan een vlak waarin de boomloopbrug zich uitstrekt, waarbij bij voorkeur tenminste een van genoemde aandrijfpaden een hoek omvat met tenminste een andere van de genoemde aandrijfpaden wanneer bekeken in genoemde kijkrichting.A gangway according to any preceding claim, wherein the boom actuator comprises a set of linear actuators each connecting the boom unit to the transfer deck along a respective drive path, preferably the set comprises at least three linear actuators whose respective drive paths differ from each other when viewed in perspective. a viewing direction orthogonal to the main boom direction and parallel to a plane in which the boom walkway extends, preferably at least one of said drive paths being angled with at least another of said drive paths when viewed in said viewing direction. 15. Werkwijze voor loopplank-bewegingscompensatie, in het bijzonder dein (heave) en/of schommel (surge) compensatie, omvattende: het voorzien in een loopplank volgens een van de voorgaande conclusies; en het tenminste transleren, en optioneel het roteren van de boomeenheid ten opzichte van het transferdek door de boomactuator.A method for gangway motion compensation, in particular heave and/or swing (surge) compensation, comprising: providing a gangway according to any one of the preceding claims; and at least translating, and optionally rotating the boom unit relative to the transfer deck by the boom actuator. 16. Werkwijze volgens conclusie 15, waarbij de boomeenheid is ingericht volgens conclusie 12, waarbij voor schommelcompensatie de werkwijze omvat: het telescoperen van de boomeenheid en tegelijkertijd het transleren van de boomeenheid ten opzichte van het transferdek in een richting die in hoofdzaak parallel is aan de hoofdboom-richting.A method according to claim 15, wherein the boom unit is arranged according to claim 12, wherein for swing compensation the method comprises: telescoping the boom unit and at the same time translating the boom unit relative to the transfer deck in a direction substantially parallel to the main tree direction. 17. Vaartuig voorzien van een loopplank volgens een van de voorgaande conclusies 1-14, waarbij het transferdek verbonden is met een basis van het vaartuig, in het bijzonder een basis die is bevestigd aan een hoofdlichaam van het vaartuig, waarbij bij voorkeur het transferdek niet- transleerbaar verbonden is met de basis.A vessel provided with a gangway according to any one of the preceding claims 1-14, wherein the transfer deck is connected to a base of the vessel, in particular a base attached to a main body of the vessel, preferably the transfer deck not being - is translatably connected to the base. 18. Offshore constructie voorzien van een loopplank volgens een van de voorgaande conclusies 1-14, waarbij het transferdek verbonden is met een basis van de offshore constructie, in het bijzonder een basis die is bevestigd aan een hoofdlichaam van de offshore constructie, waarbij bij voorkeur het transferdek niet-transleerbaar verbonden is met de basis.An offshore structure provided with a gangway according to any one of the preceding claims 1-14, wherein the transfer deck is connected to a base of the offshore structure, in particular a base which is attached to a main body of the offshore structure, preferably the transfer deck is non-translatably connected to the base. 19. Werkwijze voor het overbrengen van een object en/of persoon tussen een vaartuig en een offshore constructie, omvattende: het voorzien in een vaartuig volgens conclusie 17 en/of een offshore constructie volgens conclusie 18; het positioneren van de loopplank van het vaartuig en/of de offshore constructie om te voorzien in een overbrengings-pad tussen het vaartuig en de offshore constructie; het uitvoeren van bewegingscompensatie volgens conclusie 15 gebruik makend van de loopplank van het vaartuig en/of offshore constructie om tenminste gedeeltelijk te compenseren voor relatieve beweging tussen het vaartuig en de offshore constructie; en het overbrengen van het object en/of persoon langs de loopplank tijdens het uitvoeren van de bewegingscompensatie.A method for transferring an object and/or person between a vessel and an offshore structure, comprising: providing a vessel according to claim 17 and/or an offshore structure according to claim 18; positioning the gangway of the vessel and/or the offshore structure to provide a transfer path between the vessel and the offshore structure; performing motion compensation according to claim 15 using the gangway of the vessel and/or offshore structure to at least partially compensate for relative movement between the vessel and the offshore structure; and transferring the object and/or person along the gangway while performing the motion compensation.
NL2026600A 2020-10-01 2020-10-01 A Gangway, vessel, offshore structure and methods NL2026600B1 (en)

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