EP3196362B1 - Hubschiff und verfahren zur positionierung des schiffs auf einem unterwasserboden - Google Patents
Hubschiff und verfahren zur positionierung des schiffs auf einem unterwasserboden Download PDFInfo
- Publication number
- EP3196362B1 EP3196362B1 EP17152283.2A EP17152283A EP3196362B1 EP 3196362 B1 EP3196362 B1 EP 3196362B1 EP 17152283 A EP17152283 A EP 17152283A EP 3196362 B1 EP3196362 B1 EP 3196362B1
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- EP
- European Patent Office
- Prior art keywords
- container
- legs
- jack
- vessel
- leg
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
- E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0056—Platforms with supporting legs
- E02B2017/006—Platforms with supporting legs with lattice style supporting legs
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0056—Platforms with supporting legs
- E02B2017/0073—Details of sea bottom engaging footing
- E02B2017/0082—Spudcans, skirts or extended feet
Definitions
- the invention relates to a jack-up vessel comprising a horizontal work deck and a number of legs for supporting the work deck on an underwater bottom.
- a lower end of the legs comprises an enlarged foot section, adapted to engage or penetrate the underwater bottom, and each leg is actuated by a jacking mechanism to elevate the work deck above a water surface.
- the invention also relates to a method that positions a jack-up vessel on an underwater bottom and substantially prevents settlement/eases the removal of underwater bottom material from the legs and top side of the foot sections.
- a jack-up vessel, platform or rig comprises a horizontal work deck and at least three legs connected to the work deck.
- Such a vessel can sail to an offshore position while the legs are held in a docking position close to the work deck of the vessel.
- the vessel is anchored to the underwater bottom by bringing the legs to a lowered support position in which an enlarged foot section provided at a lower end of the legs engages or penetrates the underwater bottom.
- a hydraulic or electric system is provided to elevate the work deck upon the legs to a position above a water surface.
- the work deck can then be used as a stable platform to perform a number of tasks such as oil well drilling, mining, construction and maintenance of offshore wind turbines, bridges, and jetty or other constructions.
- the underwater bottom in many cases comprises a relatively soft material such as mud, silt, clay, sedimentary material or other known soft material that adheres to the leg lower end portion and/or on top of the foot section.
- a relatively soft material such as mud, silt, clay, sedimentary material or other known soft material that adheres to the leg lower end portion and/or on top of the foot section.
- US 3,916,633 discloses a platform provided with truss-shaped legs having spud tanks that are not enlarged laterally with respect to the legs.
- the truss-shaped legs may be provided with bags made from a flexible material and filled with water or another material in order to increase the leg's drag and inertia, and thereby contribute to a dampening effect and an altered natural frequency of the platform.
- WO 2011/116254 A2 discloses a platform with truss-shaped legs having enlarged foot sections. Water filled ballast tanks can move up and down within the legs to change buoyancy and assist or control the penetration of the legs into the sea floor, A tank positioned partly above the water line adds weight to the legs, while a tank positioned completely below the water line is neutrally buoyant and does not add penetration weight to the legs.
- US 3,118,283 discloses a jack-up vessel, the legs of which can be lifted with respect to a work deck by elevating members.
- the legs are also provided with buoyant members that can be slid along a leg between the elevating members and a foot section.
- the buoyant members are large enough to provide sufficient buoyancy for raising the combined weight of the elevating members and the working platform when the legs have found support on the bottom.
- the invention thereto provides a jack-up vessel according to claim 1.
- the jack-up vessel in accordance with the invention comprises a horizontal work deck and a number of legs for supporting the work deck on an underwater bottom, whereby a lower end of the legs comprises an enlarged foot section adapted to engage or penetrate an underwater bottom, whereby the legs are provided with at least one closable container for a compressed medium, and the container is positioned above the foot section, and within a virtual cylinder having the foot section as base, and extends along a leg over a distance at least equal to the penetration depth of the leg in the underwater bottom, is made of a flexible material and is inflatable with the medium between an empty state and an inflated state, whereto the jack-up vessel further comprises inflating and/or deflating means for bringing the at least one container to a state between the empty and the inflated state, in which the at least one container is configured to shield a volume around the leg from bottom material ingress thereby preventing accumulation of underwater bottom material on top of the foot section of the legs.
- the jack-up vessel may be positioned on an underwater bottom by a method comprising lowering the legs from a docking position close to a horizontal work deck of the jack-up vessel to a support position in which an enlarged foot section provided at a lower end of the legs engages or penetrates the underwater bottom, whereby the legs are provided with at least one closable container for a compressed medium, and the container is positioned above the foot section.
- An enlarged foot section is also referred to in the art as a spud can or a mud mat.
- a suitable container is adapted to at least partly prevent accumulation of underwater bottom material at a lower end portion of the legs.
- the jack-up vessel according to the invention comprises one or more containers, wherein the at least one container extends along a leg and is positioned within a virtual cylinder having the foot section as base.
- Such a container effectively shields a volume around the leg from bottom material ingress, said volume being particularly apt to receive such material.
- the at least one container in this embodiment preferably forms an elongated body, a longitudinal axis whereof extends substantially parallel to a longitudinal axis of the leg.
- the extension along a leg of the at least one container can also be chosen within a large range, as long as the at least one container extends along a leg over a distance at least equal to the penetration depth of the leg in the underwater bottom.
- the penetration depth of a leg may be anticipated before positioning the jack-up vessel on the underwater bottom by determining relevant properties of the bottom material, such as its cohesiveness, strength, etc..
- a container in accordance with the invention extends up to and possibly beyond the bottom surface when a leg has penetrated to a stable depth. This prevents accumulation of underwater bottom material along the leg substantially over its complete penetrated length.
- the invention provides a jack-up vessel wherein the at least one container is made of a flexible material and the container is inflatable with the medium between an empty and an inflated state. This allows changing the volume of the container at will, depending on the particular stage of operation of the jack-up vessel and its legs, for instance whether the vessel is sailing, or stationary in a jacked-up state, or whether the legs are in their docking position, or in their lowered support position, and so on.
- the at least one container may be pressurized before mounting the container on the legs.
- the invention provides a jack-up vessel that further comprises inflating and/or deflating means for bringing the at least one container to a state between the empty and the inflated state.
- the inflating and/or deflating means in a useful embodiment comprise a source of compressed medium and a medium inlet provided on the at least one container in medium communication with the source.
- a suitable source of compressed medium would be a compressor pump, provided on the work deck, that pumps medium from a medium reservoir to an inlet of the at least one container, for instance through hoses connecting the source with the inlet.
- the source (pump) may also be provided on each container in order to draw in medium, for instance surrounding water.
- Another source may comprise a number of medium jet nozzles, provided on a leg, in particular on a top side of a foot section. Each source may be electrically connected with a suitable controlling device provided on the work deck.
- a container is preferably also equipped with a remote controlled pressure gage and/or valve to maintain the desired pressure within the container. The pressure gage/valve may be integrated in the compressor pump.
- a useful embodiment of the jack-up vessel employs inflating and/or deflating means that are adapted to change the pressure inside the at least one container with the level of submersion of the at least one container.
- a container preferably needs to keep its inflated volume when a leg (and the container) is lowered under water towards the underwater bottom. This embodiment allows adjusting the internal pressure of the container to the surrounding water pressure, which obviously increases with submersion level (or water depth).
- internal pressure may be varied within a large range, internal pressures may vary between 1-200 bar for instance.
- the at least one container is also instrumental in removing bottom material that may have accumulated around the leg.
- suitable non-sticking materials for instance polyolefin materials (PE, PP), silicone and other rubbers, as well as fluor polymers, such as PTFE (Teflon®).
- a suitable medium for the container(s) may be selected according to the circumstances.
- the medium comprises air, water, or another high density substantially non-compressible fluid. Surrounding water as medium is particularly preferred.
- the at least one container may be connected (semi-)permanently to the legs of the jack-up vessel.
- Another embodiment provides a jack-up vessel wherein the at least one container is removably connected to a leg.
- the (temporary or removable) connection may be achieved with well known means, such as by riveting, welding, jointing, tying, roping, and so on.
- the legs of the jack-up platform may be any leg known in the art, such as solid legs provided at a lower end with spud cans.
- a jack-up vessel wherein the legs are truss-shaped may be the leg of choice.
- at least one container is preferably positioned inside the truss, i.e. inside an outermost contour of a (horizontal) cross-section of the truss.
- a jack-up vessel wherein the legs are truss-shaped.
- at least one container is positioned outside the truss, i.e. an outermost contour of a (horizontal) cross-section of the truss.
- the at least one container positioned outside the truss is made of a flexible material and the container is inflatable with the medium between an empty and an inflated state is preferred.
- an embodiment is provided that further comprises vibratory means for bringing the at least one container in vibration.
- Preferred vibratory means comprise hydraulic impulse means, for instance means for pulsing the output pressure of the compressor pump that inflates the at least one container.
- the invention also relates to a method for positioning a jack-up vessel on an underwater bottom, the method comprising lowering a number of legs from a docking position close to a horizontal work deck of the jack-up vessel to a support position in which an enlarged foot section (or can) provided at a lower end of the legs engages or penetrates the underwater bottom, whereby the legs are provided with at least one closable container for a compressed medium, and the container is positioned above the foot section within a virtual cylinder having the foot section as base, and extending along a leg over a distance at least equal to the penetration depth of the leg in the underwater bottom, wherein the at least one container is made of a flexible material and the container is inflated and/or deflated with the medium between an empty state and an inflated state, in which the at least one pressurized container shields a volume around the leg from bottom material ingress thereby preventing accumulation of underwater bottom material on top of the foot section of the legs.
- Preferred embodiments of the method are described in the enclosed dependent claims and relate to embodiments wherein the pressure inside the at least one container is changed with the level of submersion of the at least one container; wherein the medium comprises air or water, preferably surrounding water; and wherein a leg is penetrated in the underwater bottom to a penetration depth about equal to an extension of the at least one container along the leg.
- the at least one container positioned inside the truss is preferably in an inflated state during lowering of the legs.
- Such inside containers when filled with pressurized water have about neutral buoyancy when submerged.
- the inside container(s) are preferably kept in this state to effectively shield an inside volume of the truss legs against ingress of bottom material. Inflated inside containers further do not substantially hinder the movement of the truss legs, in particular their penetration in the underwater bottom since the inside containers are confined within a leg outer cross-sectional contour.
- the legs are truss-shaped and wherein at least one container is positioned outside the truss
- the at least one container positioned outside the truss is inflated prior to penetrating in the underwater bottom. This further reduces the amount of bottom material that may adhere to the leg.
- the jack-up platform may be disconnected from the underwater bottom after it has performed its operations at an offshore site.
- a method is provided that further comprises raising the legs from a support position in which an enlarged foot section (or can) provided at a lower end of the legs engages or penetrates the underwater bottom to a docking position close to the horizontal work deck of the jack-up vessel.
- At least one container is deflated while the leg is still penetrated in the underwater bottom. This allows pulling the leg from the underwater bottom with less force.
- bottom material may accumulate on top of the (partly) deflated container(s), but the amount is reduced, due to the presence of optional containers and/or containers that are still inflated and occupy volume.
- the method according to an embodiment provides that the at least one container that has been deflated is inflated again after it has left the underwater bottom. This process is further facilitated by an embodiment wherein the at least one container is brought in vibration.
- At least one container and preferably each container is deflated before the legs enter their docking position.
- the jack-up vessel is able to sail to another offshore site when each leg is in its docking position.
- the invention allows positioning a jack-up vessel on an underwater bottom and disconnecting the vessel from an underwater bottom in a lesser amount of time than known in the art.
- a jack-up vessel 1 for placing an object 3 on an underwater bottom 2 or for performing other offshore operations.
- the jack-up vessel 1 comprises a hull 5 such that it can navigate autonomously through thrusters 8 to an offshore location, where it can be positioned and connected to the underwater bottom 2 by lowering a number of truss legs (or spud poles) 4 onto the underwater bottom 2.
- the legs 4 may for this purpose be moved from a docking position 54 (see also figures 2A and 2B ) provided in the hull 5 towards the underwater bottom 2 by means of a rack and pinion system 7 such that the legs 4 engage or even penetrate the underwater bottom 2.
- the hull 5 of jack-up vessel 1 is then fixed relative to the underwater bottom 2 but may still be floating, as shown in figure 2A for instance.
- the hull 5 may also be raised further out of the water, as shown in figure 1 , such that a work deck 51 of the hull 5 is situated meters above the water surface 20.
- the truss legs 4 are at a lower end provided with enlarged foot sections 40 (also referred to as mud mats) to prevent the legs 4 from penetrating into the underwater bottom 2 too far.
- On the work deck 51 of hull 5 are provided several objects 3 to be placed, as well as a crane 6, pivotable about pivot 60.
- the work deck 51 of hull 5 further comprises a gripping construction 10 configured to engage an object 3 suspended from crane 6.
- figure 1 is given for illustrative purposes only and any other jack-up vessel 1 having legs 4 and employed for any other purpose may be used in the present invention.
- the underwater bottom 2 in many cases comprises a relatively soft material such as mud, silt, clay, sedimentary material or other known soft material that may adhere to a lower portion of each leg 4, and/or may accumulate on top of the foot section 40 as a mass 2adh.
- a relatively soft material such as mud, silt, clay, sedimentary material or other known soft material that may adhere to a lower portion of each leg 4, and/or may accumulate on top of the foot section 40 as a mass 2adh.
- the additional weight of the adhered materials 2adh may require higher pulling forces, and further may hinder retracting the legs 4 into their docking positions 54 close to the work deck 51.
- the adhered materials 2adh are removed, for instance by divers, which is a time-consuming operation.
- a jack-up vessel 1 is partly shown in figures 4A and 4B .
- the truss legs 4 are at a lower portion provided with a plurality of closable containers 9.
- the truss legs 4 are triangular in cross-section, and the containers 9 comprise a first set of containers 9a positioned inside the truss.
- a cross-section of the truss leg 4 is built from outer steel members 4b, between which extend a number of inner truss members 4a that together delimit four triangular subspaces 4c.
- the inside containers 9a are each contained within a substantially vertical cylinder having one of the subspaces 4c as base plane.
- the containers 9 further comprise a second set of containers 9b positioned outside the truss.
- the outside containers 9b are positioned within a virtual cylinder having the extended foot section as base and outside a substantially vertical cylinder having the triangular cross-section of the leg 4 as base plane.
- the containers 9 extend vertically along a leg 4 over a distance 12 at least equal to the penetration depth of the leg 4 in the underwater bottom 2.
- the containers 9 are positioned above the foot section 4 and are made of a flexible material, such as rubber, and they can be inflated with for instance compressed air or (surrounding) water between an empty state, as for instance shown if figure 5A for the outer containers 9b, and an inflated state, as shown in figure 5A for the inside containers 9a.
- Jack-up vessel 1 is thereto provided with inflating and/or deflating means for bringing the containers 9 to a state between the empty and the inflated state.
- suitable means comprise a compressor pump 52, provided on the work deck 51.
- the compressor pump 52 pumps water from the surrounding sea 21 to an inlet 90 of the containers 9, for instance through hoses 55 connecting the compressor 52 with the inlets 90.
- a controlling device 53 provided on the work deck 51 may regulate the pressure inside each container 9 through remote control of pressure gages and/or valves provided on the containers 9, in order to maintain the desired pressure within the containers 9, and for instance change the pressure inside the containers 9 with the submersed depth of the containers 9.
- the surface of the containers 9 may be coated with a non-stick coating layer, for instance based on a fluorinated polymer, such as PTFE.
- the containers are removably connected to members (4a, 4b) of the truss leg 4, for instance by tying.
- the containers 9 are used to advantage when positioning and disconnecting the jack-up vessel 1 on and from the underwater bottom 2.
- Positioning the jack-up vessel 1 on the underwater bottom 2 involves lowering each truss leg 4 from its docking position 54 to a support position, shown in figures 4A and 5A , in which the enlarged foot section 40 of each truss leg 4 has penetrated the underwater bottom 2 over a stable distance 13.
- the containers 9a positioned inside the truss leg 4 are in an inflated state, as shown in figures 4A and 5A . This prevents bottom material from entering the inside volumes 4c of the truss legs 4.
- the outside containers 9b are preferably also in an inflated state, see figure 4A .
- the height 12 of the containers 9 is chosen such that the legs 4 stably penetrate to a penetration depth 13 which is about equal to the extensional height 12 of the containers 9 along the legs 4. This prevents bottom material accumulation on top of the containers 9.
- each truss leg 4 When the legs 4 need to be retracted from the bottom 2 to free the jack-up vessel 1 from the bottom, each truss leg 4 is raised from its support position in which the foot section 40 engages or is embedded in the underwater bottom 2 to its docking position 54.
- a first embodiment is shown in figure 4B in which the outside containers 9b remain in an inflated state during raising of the truss legs 4. This considerably reduces the amount of bottom material 2adh adhered to the foot section 40 and other parts of the legs 4, such as the containers 9. This facilitates removing the truss legs 4 from the bottom 2.
- FIG. 5A A second embodiment is shown in figures 5A and 5B in which the inside containers 9a remain in an inflated state during raising of the truss legs 4.
- the outside containers 9b however are deflated while the legs 4 are still penetrated in the underwater bottom, see figure 5A .
- This additional amount of bottom material 2adh is relatively easy removed from the legs 4 by a further step of the method wherein the outer containers 9b that were deflated are inflated again to a partly or fully inflated state after the containers 9b have left the underwater bottom 2.
- This method step, shown in figure 6A effectively shakes off adhered underwater bottom material 2adh.
- the containers 9b are simultaneously brought in vibration 15 by pulsating the inner pressure of the containers 9b, as schematically shown by
- a last step, shown in figure 6B involves jacking up the legs 4 further until they can be accommodated inside the docking positions 54.
- the outside containers 9b are deflated before entering their docking position 54.
- the inside containers 9a and/or the outside containers 9b may be provided with pressure valves 56 for releasing excess pressure from within the containers 9.
- Stacking a plurality of smaller containers (9a-1, 9a-2,..., 9a-8) inside a truss leg 4, as shown in figure 8 may be beneficial in terms of flexibility.
Claims (17)
- Hubschiff (1), das ein horizontales Arbeitsdeck (51) und mehrere Beine (4) aufweist, um das Arbeitsdeck auf einem Unterwasserboden (2) zu halten, wobei ein unteres Ende der Beine einen vergrößerten Fußabschnitt (40) aufweist, der dazu ausgelegt ist, in einen Unterwasserboden (2) über eine Eindringtiefe (13) der Beine (4) einzudringen, wobei die Beine (4) mit wenigstens einem verschließbaren Behälter (9) für ein komprimiertes Medium vorgesehen sind, wobei der wenigstens eine Behälter (9) über dem Fußabschnitt (40) in einem virtuellen Zylinder angeordnet ist, der den Fußabschnitt als Basis hat, und entlang eines Beines (4) über eine Entfernung (12) verläuft, die mindestens gleich der Eindringtiefe (13) des Beines (4) in den Unterwasserboden (2) ist, aus einem flexiblem Material hergestellt ist und mit dem Medium zwischen einem entleerten Zustand und einem aufgeblasenen Zustand aufblasbar ist, wobei das Hubschiff weiterhin Aufblas- und/oder Entleerungsmittel aufweist, um den wenigstens einen Behälter in einen Zustand zwischen dem entleerten und dem aufgeblasenen Zustand zu bringen, wobei der wenigstens eine Behälter (9) ausgestaltet ist, ein Volumen um das Bein (4) vor einer Materialeindringung von Bodenmaterial zu schützen, wodurch eine Anhäufung von Unterwasserbodenmaterial auf dem Fußabschnitt (40) der Beine (4) verhindert wird.
- Hubschiff nach Anspruch 1, wobei die Aufblase- und/oder Entleerungsmittel eine Quelle des komprimierten Mediums und einen Mediumeinlass aufweisen, der an dem wenigstens einen Behälter in Medienaustausch mit der Quelle vorgesehen ist.
- Hubschiff nach Anspruch 1 oder 2, wobei die Aufblase- und/oder Entleerungsmittel ausgelegt sind, den Druck in dem wenigstens einen Behälter mit dem Grad des Eintauchens des wenigstens einen Behälters zu ändern.
- Hubschiff nach einem der vorhergehenden Ansprüche, wobei eine Oberfläche des wenigstens einen Behälters haftungsfrei ist, bevorzugter mit einer haftungsfreien Beschichtungsschicht vorgesehen ist.
- Hubschiff nach einem der vorhergehenden Ansprüche, wobei das Medium Luft oder Wasser aufweist, vorzugsweise Umgebungswasser.
- Hubschiff nach einem der vorhergehenden Ansprüche, wobei der wenigstens eine Behälter entfernbar mit einem Bein verbunden ist.
- Hubschiff nach einem der vorhergehenden Ansprüche, wobei die Beine eine Trägerform haben und wenigstens ein Behälter im Träger angeordnet ist, zusätzlich dazu, dass wenigstens ein Behälter außerhalb des Trägers angeordnet ist.
- Hubschiff nach einem der vorhergehenden Ansprüche, das weiterhin Vibrationsmittel aufweist, um den wenigstens einen Behälter in Vibration zu bringen.
- Verfahren zum Positionieren eines Hubschiffs (1) auf einem Unterwasserboden (2), wobei das Verfahren das Absenken mehrerer Beine (4) von einer Andockposition nahe einem horizontalen Arbeitsdeck (51) des Hubschiffs in eine Halteposition aufweist, in der ein am unteren Ende der Beine (4) vorgesehener vergrößerter Fußabschnitt (40) in den Unterwasserboden (2) über eine Eindringtiefe (13) des Beins (4) eindringt, wobei die Beine (4) mit wenigstens einem verschließbaren Behälter (9) für ein komprimiertes Medium vorgesehen sind, und der Behälter (9) über dem Fußabschnitt (40) in einem virtuellen Zylinder angeordnet ist, der den Fußabschnitt als Basis hat und entlang eines Beins (4) über eine Entfernung (12) verläuft, die mindestens gleich der Eindringtiefe (13) des Beins (4) in den Unterwasserboden (2) ist, wobei der wenigstens eine Behälter (9) aus einem flexiblem Material hergestellt ist und der Behälter (9) mit dem Medium zwischen einem leeren Zustand und einem aufgeblasenen Zustand aufblasbar und/oder entleerbar ist, wobei der wenigstens eine unter Druck stehende Behälter (9) ein Volumen um das Bein (4) vor Eindringung von Bodenmaterial schützt, wodurch eine Anhäufung von Unterwasserbodenmaterial auf dem Fußabschnitt (40) der Beine (4) verhindert wird.
- Verfahren nach Anspruch 9, wobei die Anhäufung von Unterwasserbodenmaterial während der Eindringung der Beine in den Unterwasserboden verhindert wird.
- Verfahren nach Anspruch 10, wobei der Druck in dem wenigstens einen Behälter gemäß dem Grad des Eintauchens von dem wenigstens einem Behälter geändert wird.
- Verfahren nach Anspruch 10 oder 11, wobei die Beine eine Trägerform haben, wobei wenigstens ein Behälter im Träger angeordnet ist und wobei der wenigstens eine im Träger angeordnete Behälter beim Absenken der Beine in einem aufgeblasenen Zustand ist.
- Verfahren nach einem der Ansprüche 10 bis 12, wobei die Beine eine Trägerform haben, und wobei der wenigstens eine außerhalb des Trägers angeordnete Behälter vor dem Eindringen in den Unterwasserboden aufgeblasen wird.
- Verfahren nach einem der Ansprüche 10 bis 13, das weiterhin das Anheben eines Beins aus einer Halteposition, in der ein an einem unteren Ende des Fußes vorgesehener vergrößerter Fußabschnitt in den Unterwasserboden eingreift oder eindringt, in eine Andockposition nahe dem horizontalen Arbeitsdeck des Hubschiffs aufweist, wobei der wenigstens eine Behälter entleert ist, während das Bein immer noch in dem Unterwasserboden eingedrungen ist.
- Verfahren nach Anspruch 14, wobei der wenigstens eine Behälter entleert und wieder aufgeblasen wird, nachdem er den Unterwasserboden verlassen hat, um das Unterwasserbodenmaterial abzuschütteln.
- Verfahren nach Anspruch 15, wobei der wenigstens eine Behälter in Vibration gebracht wird.
- Verfahren nach einem der Ansprüche 14 bis 16, wobei der wenigstens eine Behälter entleert wird, bevor er in die Andockposition eintritt.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE2016/5049A BE1023304B1 (nl) | 2016-01-21 | 2016-01-21 | Jack-up vaartuig en werkwijze voor het opstellen van het vaartuig op een onderwaterbodem |
Publications (2)
Publication Number | Publication Date |
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EP3196362A1 EP3196362A1 (de) | 2017-07-26 |
EP3196362B1 true EP3196362B1 (de) | 2019-11-27 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17152283.2A Active EP3196362B1 (de) | 2016-01-21 | 2017-01-19 | Hubschiff und verfahren zur positionierung des schiffs auf einem unterwasserboden |
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EP (1) | EP3196362B1 (de) |
BE (1) | BE1023304B1 (de) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3118283A (en) * | 1964-01-21 | Xkilling barge | ||
US2774218A (en) * | 1955-11-18 | 1956-12-18 | Raymond Concrete Pile Co | Methods and means for facilitating removal of offshore platform supports from mud |
US3916633A (en) * | 1973-08-24 | 1975-11-04 | Engineering Technology Analyst | Means for altering motion response of offshore drilling units |
US6481932B1 (en) * | 1999-11-18 | 2002-11-19 | Suction Pile Technology B.V. | Marine structure |
WO2011116254A2 (en) * | 2010-03-19 | 2011-09-22 | National Oilwell Varco, L.P. | Jack-up rig with leg-supported ballast loads |
KR101368892B1 (ko) * | 2012-06-21 | 2014-03-04 | 삼성중공업 주식회사 | 부유식 구조물의 스퍼드캔 |
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2016
- 2016-01-21 BE BE2016/5049A patent/BE1023304B1/nl not_active IP Right Cessation
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2017
- 2017-01-19 EP EP17152283.2A patent/EP3196362B1/de active Active
Non-Patent Citations (1)
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BE1023304B1 (nl) | 2017-01-27 |
EP3196362A1 (de) | 2017-07-26 |
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