EP2275341B1 - Ponton relevable - Google Patents

Ponton relevable Download PDF

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Publication number
EP2275341B1
EP2275341B1 EP20100007386 EP10007386A EP2275341B1 EP 2275341 B1 EP2275341 B1 EP 2275341B1 EP 20100007386 EP20100007386 EP 20100007386 EP 10007386 A EP10007386 A EP 10007386A EP 2275341 B1 EP2275341 B1 EP 2275341B1
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EP
European Patent Office
Prior art keywords
jack
barge
leg
sensors
platform
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EP20100007386
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German (de)
English (en)
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EP2275341A3 (fr
EP2275341A2 (fr
Inventor
Stefano Malagodi
Andrea Tiberio
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In Novo d o o
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In Novo d o o
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices

Definitions

  • the present invention relates to a jack-up barge according to the preamble of independent claim number 1, as known for example from US 3797256 .
  • the jack-up barge according to the present invention is intended for use in marine, lake or river environments and, more generally, in environments in which there is a need to install a stable artificial platform above the surface of the water, from which specific operations can easily be carried out beneath the surface of the water, for example to service underwater installations or perform work at the bottom of the sea, lake or river.
  • jack-up barges are used in a variety of technical sectors. In the oil industry, for instance, they are used when searching for new oilfields and in the extraction and transportation of oil and natural gas under the sea.
  • Jack-up barges are also widely used in many other technical fields, for instance to carry out operations in connection with the restoration of the seafloor, maintenance of navigational channels, geological and penetration tests, and for many other operations besides.
  • Jack-up barges otherwise known as jack-up platforms, are special structures designed to respond to specific operational needs of the type mentioned above.
  • jack-up barges provided with a platform comprising a plurality of modular elements that can be joined together side by side to obtain platforms with a generally quadrangular shape.
  • the possibility of assembling and dismantling the modular elements of such platforms makes them easier to transport before being assembled, usually in water.
  • the use of modular elements allows differently-sized platforms to be built, depending on the specific operational requirements of the application for which they are to be used.
  • the modular elements are generally available in a variety of sizes and are provided with suitable removable anchoring means, which are used to join them together.
  • Jack-up barges can assume two different configurations: as a floating platform, with the legs raised, and as a stable structure, with the legs lowered and resting on the seabed to support the platform.
  • jack-up barges are placed in the floating condition when they have to cover long distances over water, in which case, for example, they can be self-propelled or towed, and are usually only arranged in the stable configuration to enable the required operational activities to be carried out.
  • the platform of the barge is generally arranged so as to be raised above the surface of the water, to prevent waves or currents from placing excessive mechanical strain on the barge structure, especially in bad weather conditions.
  • said barges are provided with means for adjusting the height of the legs with respect to the platform, so that the legs can be lowered or raised with respect to the platform.
  • barges have been provided with adjustment means comprising one or more racks attached to each leg of the barge and motor-powered means mounted on the platform, with pinions that engage the racks in order to lower or raise the legs with respect to the platform.
  • adjustment means comprising one or more racks attached to each leg of the barge and motor-powered means mounted on the platform, with pinions that engage the racks in order to lower or raise the legs with respect to the platform.
  • Each leg is normally inserted in a seat that is integral with the platform suitable to guide it during its movement.
  • said adjustment means have some drawbacks: selectively inserting the pins in the holes is not very convenient and there is the possibility of the pins bending or sticking in said holes, in which case they are difficult to remove.
  • the barge is provided with adjustment means comprising hydraulic cylinders with clamping means fixed to the heads of the relative pistons that grip the legs by frictional force.
  • the main drawback of said barge lies in the fact that the clamps do not guarantee a secure grip, since they only rely on frictional force. Both the clamps and the legs are thus subject to significant wear and tear.
  • Patent US 3797256 describes a jack-up rig comprising a floating platform sustained on the sea bottom by four supporting legs arranged at corner portions of the platform and which can be raised and lowered.
  • This platform is not joined to the rest, which consists of mechanically connected removable modules that are arranged side by side, and do not contribute with closed chambers to the hydrostatic floating thrust of the platform.
  • the present invention overcomes the inconveniences of the prior art described above by providing a jack-up barge comprising height adjustment means that are safe and operationally completely reliable.
  • a further object of the present invention is to provide a jack-up barge comprising height adjustment means that involve limited maintenance costs.
  • a further object of the present invention is to provide a jack-up barge comprising height adjustment means that are easy to use.
  • a further object of the present invention is to provide a jack-up barge with a reduced overall weight that also guarantees high safety standards.
  • a jack-up barge according to the present invention is designated as a whole by reference number 1.
  • the jack-up barge 1 can be of any suitable size and for use in any field of application without departing from the scope of the present invention.
  • the jack-up barge 1 comprises a floating platform 2 and a plurality of support legs 3 mounted orthogonally on the floating platform 2.
  • the legs 3 are provided with feet 35 at the bottom, which rest on the seafloor and increase the stability of the barge 1.
  • Each foot 35 is joined to the bottom end of the relative leg 3 by means of a first flange 36 and, advantageously, a spherical hinge 37 is inserted between the first flange 36 and the foot 35, which enables the foot 35 to tilt and adjust to the surface of the seafloor in the exact point on which it stands.
  • the legs 3 can be obtained by joining several consecutive posts 38 in an aligned fashion, using one or more second flanges 39, until reaching the desired length.
  • the floating platform 2 consists of a plurality of modules 4, that can be joined mechanically by means of removable fixing means 5.
  • each of the modules 4 has a three-dimensional frame, preferably in the shape of a parallelepiped and generally consisting of steel separators and girders, with a plurality of protective metal walls, not illustrated in figure 4 , which are also generally made of steel and are carefully welded together in order to guarantee the watertightness of the modules 4 and guarantee their floatability.
  • modules thus refers to watertight bodies that can be joined together mechanically and are arranged side by side to form the floating platform 2.
  • the removable fixing means 5, suitable to join the modules 4 laterally to one another, can advantageously be of the male-female type.
  • the removable fixing means 5 comprise one or more pins 6, fixed to the three-dimensional frame of a module 4 and projecting from at least one side wall of the latter. Said pins 6 are intended to be inserted into the same number of matching holes 7 obtained in the three-dimensional frame of a different module 4 and opening out in at least one side wall of the latter to be placed alongside the side wall provided with pins 6 of the other module 4.
  • the pins 6 and the matching holes 7 are arranged in one or more parallel vertical rows.
  • the clamping element 8 is a guillotine-type element that extends inside each module 4, in correspondence with a row of matching holes 7, along the entire height of the module 4 and projects from the top of the latter with a gripping portion 9, which enables it to be operated from the outside. More in detail, the clamping element 8 comprises a plurality of plates 10 decreasing in thickness towards the bottom, which are joined by means of one or more bars 11. The plates 10 are provided with shaped holes 12, obtained in correspondence with the matching holes 7.
  • Said shaped holes 12 have a wide lower portion 13 and a narrow upper portion 14.
  • each pin 6 is inserted into the corresponding matching hole 7, conveniently passing through the wide lower portion 13 of the shaped hole 12, as illustrated in figure 5C .
  • the clamping element 8 is then pushed down and the pin 6 enters the narrow portion 14 of the shaped hole 12.
  • Each plate 10 is thus wedged into a specific groove 15 obtained on each pin 6, thus locking the latter in the matching hole 7, as illustrated in figures 5A and 5B , so that the two modules 4 arranged side by side are clamped together.
  • the pins 6 project from two adjacent side walls of each module 4 and the matching holes 7 are obtained in the other two adjacent side walls.
  • the modules 4 comprise three or more lifting modules 16 each of which is mechanically associated with a leg 3 and is provided with a support frame 17.
  • Said support frame 17 has, centrally fixed, a guide structure 18, in which the leg 3 is inserted, and has fixed a plurality of buffer panels 19, which define together with said guide structure 18, a closed box-shaped body, which participates in the hydrostatic floating thrust of said floating platform 2.
  • the guide structure 18 is suitable to receive and guide the leg 3 during its movements.
  • the panels are fixed to the support frame 17 on the outside of the guide structure.
  • the guide structure 18 has a hollow cylindrical shape and is fixed to the support frame 17 by means of first radial sheet plates 20, which can, for example, be welded.
  • the guide structure 18 bears a plurality of first radially mounted and inwardly facing rollers 21, suitable to facilitate the sliding of the leg 3 therein.
  • Said first rollers 21 may be mounted, for example, on forks 24 fixed by means of screws 22a and clamping nuts 22b to the guide structure 18 and, preferably, also pivotally attached to radial stiffening ribs 23 of the guide structure 18.
  • Said radial stiffening ribs 23 extend from a lower annular reinforcement 61 and from an upper annular reinforcement 62 of the guide structure 18.
  • the latter is also advantageously provided with horizontal stiffening ribs 25, which increase the resistance of said guide structure 18 to the mechanical stress to which it is exposed during the raising and lowering of the leg 3.
  • Each lifting module 16 is provided with adjustment means 26 for modifying the height of the legs 3 with respect to the floating platform 2.
  • Said adjustment means 26 comprise a plurality of anchoring elements 27 arranged along the length of the legs 3, at least one fixed ring 28, fixed concentrically to the guide structure 18 of the lifting module 16 and through which the leg 3 inserted in the guide structure 18 passes, at least one mobile ring 29, axially aligned with the fixed ring 28 and through which the leg 3 passes, and lifting actuator means 30, which support the mobile ring 29 with respect to the fixed ring 28 and can be operated to modify the distance between the two rings.
  • the fixed ring 28 supports a first locking member 31 which is actuated by at least a first actuator 32 to move between a first interference position, in which it intercepts at least one anchoring element 27 of the leg 3, preventing it from making axial movements in at least one direction, and a first non-interfering position, in which it is unconstrained by the anchoring elements 27 of the leg 3, freeing it with respect to axial movements within the guide structure 18.
  • the mobile ring 29 supports a second locking member 33 which can be actuated by at least a second actuator 34 to move between a second interference position (see figure 11A ), in which it intercepts at least one anchoring element 27 of the leg 3, preventing it from making axial movements in a least one direction, and a second non-interference position (see figure 11B ), in which it is unconstrained by the anchoring elements 27 of the leg 3, freeing it with respect to axial movements within the guide structure 18.
  • a second interference position see figure 11A
  • FIG 11B a second non-interference position
  • the anchoring elements 27 consist of projecting plates attached to each leg 3.
  • said plates are aligned, in at least one row, along the longitudinal length of each leg 3, and arranged at equal distances apart.
  • Said plates are preferably made of metal and are welded to each leg 3.
  • the first and the second locking member, 31 and 33, as illustrated in figure 12 each comprise at least one arched body 40, which extends at least partially around the leg 3 and is provided with a least one lock element 41 projecting towards the leg 3 and suitable to interfere with the anchoring elements 27 of the leg 3 when the first and/or the second locking members are respectively in the first and/or second interference position.
  • first and the second locking member, 31 and 33 each comprise two arched bodies 40, arranged in diametrically opposite positions with respect to the leg 3 and each of which is provided with two lock elements 41.
  • the lock elements 41 are fixed, preferably welded, to each arched body 40 and advantageously have a flat upper surface 42 and lower surface 43, suitable to rest respectively on the lower interference surface 45 and on the upper interference surface 44 of the anchoring elements 27 of the legs 3, when the first and/or the second locking member are respectively in the first and/or in the second interference position.
  • the first and the second actuator, 32 and 34 actuate the first and the second locking member, 31 and 33, respectively, to rotate with the arched body 40 around the leg 3, between the respective interference positions and non-interference positions.
  • the first and the second actuator, 32 and 34 respectively comprise one or more first hydraulic cylinders 47, suitable to activate the first locking member 31, and one or more second hydraulic cylinders 49, suitable to activate the second locking member 33.
  • first cylinders 47 are fixed externally to the fixed ring 28 and, advantageously, are pivotally attached to two second plates 50 welded to the fixed ring 28, as illustrated in figures 6 and 7 .
  • the first cylinders 47 are provided with first movable pistons 46 connected at the head to the arched bodies 40 of the first locking member 31 and, in particular, are pivotally attached to first eyebolts 51 welded to the external surface of the arched bodies 40.
  • the first eyebolts 51 project from the fixed ring 28 through first slots 52 specifically obtained therein.
  • the first cylinders 47 act with their first pistons 46 on the arched bodies 40 which thus rotate by an appropriate angle, bringing the lock elements 41 to interfere or not with the anchoring elements 27 of the leg 3.
  • the second cylinders 49 are fixed externally to the mobile ring 29 and are, advantageously, pivotally attached to two third plates 53 welded to the mobile ring 29, as illustrated in figures 6 and 7 .
  • the second cylinders 49 are provided with second movable pistons 48, connected at the head to the arched bodies 40 of the second locking member 33 and, in particular, are pivotally attached to second eyebolts 54 welded to the external surfaces of the arched bodies 40.
  • the second eyebolts 54 project from the mobile ring 29 through second slots 55 specifically obtained therein.
  • the second cylinders 49 act with their second pistons 48 on the arched bodies 40, which thus rotate by an appropriate angle, bringing the lock elements 41 to interfere or not with the anchoring elements 27 of the leg 3.
  • the external surfaces of the arched bodies 40 of the first and of the second locking member 31 and 33 are advantageously provided with a plurality of anti-friction elements 56.
  • the lifting actuator means 30, which support the mobile ring 29 with respect to the fixed ring 28, comprise one or more third hydraulic cylinders 57, mechanically connected to the fixed ring 28 and provided with third pistons 58 connected to the mobile ring.
  • third hydraulic cylinders 57 which are arranged diametrically opposite the two rings.
  • the third cylinders 57 are pivotally attached to third eyebolts 59 welded to the external surface of the fixed ring 28, while the heads of their third pistons 58 are connected to the mobile ring 29, and, more in detail, pivotally attached to fourth eyebolts 60 welded to the external surface of the mobile ring 29.
  • the fixed ring 28 and the mobile ring 29 bear one or more second radially mounted and inwardly facing rollers 63, suitable to facilitate the sliding of the leg 3 therein.
  • one or more anti-rotation elements 64 are attached to the top of the fixed ring 28 and of the mobile ring 29, suitable to be aligned with the rows of anchoring elements 27 fixed to the leg 3.
  • the anchoring elements 27 are made to slide through the anti-rotation elements 64, which guide them in their vertical motion, preventing the leg 3 from rotating about its longitudinal axis.
  • the adjustment means 29 act according to a sequence of operations which are described below and schematically illustrated in figure 14 .
  • the sequence of operations starts from the condition illustrated in figure 14a , in which the first locking member 31 is in the first interference position, with the lock elements 41, attached thereto, intercepting the anchoring elements 27 of the leg 3, preventing the latter from sliding axially within the fixed ring 28.
  • the lower interference surface 45 of an anchoring element 27 of the leg 3 comes to rest against the upper surface 42 of each lock element 41, to support said leg 3.
  • the second locking member 33 is then moved into the second non-interference position with the lock elements 41, attached thereto, which do not intercept the anchoring elements 27 of the leg 3, allowing the latter to slide axially within the mobile ring 29.
  • the lock elements 41 are interposed between two adjacent rows of anchoring elements 27, thus releasing the second locking member 33 from the anchoring elements 27 of the leg 3 and allowing the mobile ring 29 to slide axially along the leg 3.
  • the actuator lifting means 30 push the mobile ring 29 away from the fixed ring 28, so that it slides axially with respect to the leg 3.
  • the third cylinder 57 mounted on the fixed ring 28, pushes out the relative third piston 58 connected to the mobile ring 29, thus raising the mobile ring 29 and moving it away from the fixed ring 28.
  • the second locking member 33 is brought to the second interference position (see figure 14c ), with the lock elements 41 attached thereto that intercept the anchoring elements 27 of the leg 3, preventing the latter from sliding axially within the mobile ring 29.
  • the first locking member 31 is brought to the first non-interference position (see figure 14d ) with the lock elements 41 that do not intercept the anchoring elements 27 of the leg 3, thus allowing the latter to slide axially within the fixed ring 28.
  • the actuator lifting means 30 bring the mobile ring 29 towards the fixed ring 28 (see figure 14e ), making the leg 3 slide axially with respect to the fixed ring 28 and then lowering it with respect to the floating platform 2.
  • the first locking member 31 is preferably brought to the first interference position to prevent the leg 3 from weighing on the third pistons 58.
  • the adjustment means 26 can be used to move the jack-up barge 1 from the stable condition to the floating condition, i.e. to lower the platform 2 until it floats on the water and, then to raise the legs 3 with respect to the platform 2.
  • the first step in the sequence of operations envisages passing from the condition in figure 14a with the first locking member 31 in the first interference position and with the second locking member 33 in the second non-interference position to the condition in figure 14e with the first locking member 31 in the first non-interference position and with the second locking member 33 in the second interference position, via the intermediate condition in figure 14f , in which both of the locking members 31 and 33 are in the respective interference position.
  • the lifting means 30 are actuated the platform 2 is lowered, passing from the condition in figure 14e to that in figure 14d .
  • the third pistons 58 of the third cylinders 57 can be recuperated (see figure 14a ) before starting the cycle to lower the platform 2 or raise the leg 3.
  • each lock element 41 rests on the upper interference surface 44 of an anchoring element 27 of the leg 3 supporting the platform 2.
  • the lower interference surface 45 of an anchoring element 27 of the leg 3 comes to rest on the upper surface 42 of each lock element 41, supporting the leg 3.
  • the jack-up barge 1 comprises a control unit 11, preferably mounted above the floating platform 2, which, via distribution valves, supplies the cylinders 47, 49 and 57, described previously, with the necessary hydraulic power, i.e. with the oil at an adequate pressure and flow rate.
  • a control panel 101 preferably mounted on a structure in common with the control unit 100 mounted above the deck of the floating platform 2, sends the command signals to said control unit 100 to operate the cylinders 47, 49 and 57, according to set operating sequences, as previously described in particular with reference to the raising or lowering of the floating platform 2, or according to set safety conditions.
  • the control panel 101 is housed in a watertight casing and is provided with a first logic controller or PLC, which is provided with digital and/or analog input connections to receive diagnostic signals from relative digital or analog sensors described more in detail below, and output connections to send the command signals to the central control unit 100 to operate the valves that control the cylinders 47, 49 and 57 in order to raise or lower the platform 2, and to define set safety conditions.
  • a first logic controller or PLC which is provided with digital and/or analog input connections to receive diagnostic signals from relative digital or analog sensors described more in detail below, and output connections to send the command signals to the central control unit 100 to operate the valves that control the cylinders 47, 49 and 57 in order to raise or lower the platform 2, and to define set safety conditions.
  • the first PLC monitors the state of all the actuators 30, 32 and 34, i.e. of the first, second and third cylinders 47, 49 and 57 (those that operate the locking members 31, 33 of the rings 28, 29 and those for raising the mobile ring 29 with respect to the fixed ring 28) and verifies, via the sensors, whether, for example, the cylinders are open or closed and/or their extension.
  • first sensors 102 are provided, in particular of the linear type and preferably magnetostrictive sensors, each mounted in the liner of a hydraulic cylinder, to send an analog output signal to indicate the position of the piston in the cylinder liner.
  • the first linear sensors 102 may consist of simple proximity sensors, for example capacitive sensors, to signal to the first control unit whether the cylinders are open or closed.
  • the first sensors 102 (schematically illustrated in figure 13 ) are also suitable to inform the first logic controller of the position of the cylinder piston and thus of the possible residual extension thereof so that the floating platform 2 can be raised and lowered more quickly, by controlling the two locking members 31, 33 so as to engage anchoring elements 27 at a distance from one another and not contiguous and thus controlling the third cylinders 57 to raise or lower the mobile ring 29 with respect to the fixed ring 28 of a corresponding stroke.
  • Sensing means 103 are also provided to monitor the anchoring elements 27 arranged along the length of the legs 3, in order to detect the position of said anchoring elements 27 with respect to the locking members 31, 33 of the fixed ring 28 and of the mobile ring 29, so as to control the activation of the relative first and second cylinders 47, 49.
  • said sensing means 103 comprise a number of second sensors 104, in particular four inductive sensors, mounted on the support frame 17, and preferably on the guide structure 18 aligned along the vertical axis thereof.
  • Said guide structure 18 is specifically threaded and provided with specific holes to house the body of said second sensors 104 so as to be radially arranged towards the legs 3.
  • Said second sensors 104 are suitable to emit a status signal to indicate the presence or absence of the anchoring element 27 (corresponding to the increase or reduction in inductance in the case of inductive sensors).
  • the first controller recognises whether the locking members 31, 33 are facing an anchoring element 27 or, even, only partially facing an anchoring element 27 (for example if they are half-way above or below the anchoring element 27).
  • the second sensors 104 are preferably arranged longitudinally (vertically) in succession so as to substantially cover the distance between two anchoring elements 27.
  • Different sensing means 103 capable of continuously indicating the exact position of the anchoring elements 27 may, of course, be provided.
  • third inclination sensors or clinometers 105 mounted inside the panel 101 and suitable to control the levelness of the floating platform 2. More in detail, the panel 101 is arranged on a base, which is level with respect to the deck of the floating platform 2 and set in place using adjustment screws to gauge its initial levelness.
  • a third inclination sensor 105 detects an inclination of the platform 102 exceeding a previously defined limit (for example preferably approx. 5 degrees) it sends a signal to the first logic controller so that the substantial levelness of the platform 2 is maintained during the operations performed to lower or raise the platform 2.
  • the raising and lowering operations controlled by the controller via the control unit which controls the various cylinders are subject to the preliminary hierarchical control of the levelness of the floating platform 2.
  • the locking members 31, 33 are actuated after appropriately raising or lowering the relative leg 3 by means of the third cylinders 57 that lift the mobile ring 29 with respect to the fixed ring 28, compatibly with the levelness conditions defined by said third inclination sensors 105.
  • the barge 1 is made to stand on its support legs 3 resting on the seafloor or is lowered to the floating position by sending a simple start command.
  • the first logic controller is also capable of managing the operations to raise and lower the floating platform 2 automatically even in the case of an uneven seafloor, or more generally of a seafloor that is not horizontal or with variable ground stress.
  • a second logic controller is also provided (in particular with relay controls) to ensure the safety of all the drives of the barge 1 and which hierarchically prevails over the commands of the first PLC.
  • said second controller prevents certain combinations of cylinder conditions from occurring (for example the simultaneous opening of the two locking members 31, 33).
  • Said second controller is operated by the same sensors that send information to the first logic controller.
  • pressure transducer sensors are also provided, arranged inside the liners of the cylinders 47, 49 and 57 to detect whether the individual cylinders are loaded and, for example with reference to the third cylinders 57, whether they are bearing the weight of the platform 2 or whether they have been unloaded and, for example, the weight of the platform is borne by the legs 3.
  • pressure transducer sensors are also provided, arranged inside the liners of the cylinders 47, 49 and 57 to detect whether the individual cylinders are loaded and, for example with reference to the third cylinders 57, whether they are bearing the weight of the platform 2 or whether they have been unloaded and, for example, the weight of the platform is borne by the legs 3.

Claims (15)

  1. Ponton auto-élévateur (1), lequel comprend :
    - une plate-forme flottante (2) formée d'une pluralité de modules (4) joints mécaniquement entre eux par l'intermédiaire de moyens de fixation amovible (5) ;
    - une pluralité de jambes de support (3) montées orthogonalement sur ladite plate-forme flottante (2) ;
    caractérisé en ce que lesdits modules (4) sont des corps étanches qui sont placés côte à côte pour réaliser la plate-forme flottante (2), comprennent au moins trois modules de soulèvement (16), chacun desquels est associé mécaniquement à une jambe (3), est muni d'un châssis de support (17) ayant une structure de guidage (18) fixée centralement avec ladite jambe (3) insérée dans celle-ci et supportant une pluralité de panneaux de colmatage (19) fixés, adaptés pour délimiter, conjointement à ladite structure de guidage (18), un corps en caisson fermé, lequel participe à la poussée hydrostatique de flottaison de ladite plate-forme flottante (2).
  2. Ponton auto-élévateur (1) selon la revendication 1, caractérisé en ce que chaque module de soulèvement (16) est muni de moyens de réglage (26) pour modifier la hauteur desdites jambes (3) par rapport à ladite plate-forme flottante (2), lesquels comprennent :
    - une pluralité d'éléments d'ancrage (27) prédisposés le long de l'extension desdites jambes (3) ;
    - au moins un anneau fixe (28), lequel est fixé de manière concentrique avec la structure de guidage (18) dudit module de soulèvement (16), est traversé par ladite jambe (3) et supporte un premier organe de blocage (31) actionnable par au moins un premier actionneur (32) pour se déplacer entre une première position d'interférence, dans laquelle il intercepte au moins un élément d'ancrage (27) de ladite jambe (3) en empêchant ses déplacements axiaux dans au moins une direction, et une première position de non interférence, dans laquelle il est désengagé par rapport aux éléments d'ancrage (27) de ladite jambe (3), en la libérant par rapport à des déplacements axiaux à l'intérieur de ladite structure de guidage (18) ;
    - au moins un anneau mobile (29), lequel est aligné axialement avec ledit anneau fixe (28), est traversé par ladite jambe (3) et supporte un deuxième organe de blocage (33) actionnable par au moins un deuxième actionneur (34) pour se déplacer entre une deuxième position d'interférence, dans laquelle il intercepte au moins un élément d'ancrage (27) de ladite jambe (3) en empêchant ses déplacements axiaux dans au moins une direction, et une deuxième position de non interférence, dans laquelle il est désengagé par rapport aux éléments d'ancrage (27) de ladite jambe (3), en la libérant par rapport à des déplacements axiaux à l'intérieur de ladite structure de guidage (18) ;
    - des moyens actionneurs de soulèvement (30), lesquels supportent ledit anneau mobile (29) par rapport audit anneau fixe (28) et sont actionnables pour modifier la distance entre lesdits deux anneaux.
  3. Ponton auto-élévateur (1) selon la revendication 2, caractérisé en ce que ledit premier organe de blocage (31) et ledit deuxième organe de blocage (33) comprennent chacun au moins un corps en forme d'arc (40) s'étendant au moins partiellement autour de ladite jambe (3), muni d'au moins un élément de blocage (41) faisant saillie vers ladite jambe (3) et susceptible d'interférer avec les éléments d'ancrage (27) de ladite jambe (3) quand lesdits premier et/ou deuxième organes de blocage (31 et/ou 33) sont respectivement dans lesdites première et/ou deuxième positions d'interférence.
  4. Ponton auto-élévateur (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits éléments d'ancrage (27) sont constitués par des plaques en saillie, fixées alignées suivant au moins une rangée le long de l'extension longitudinale de chacune dite jambe (3).
  5. Ponton auto-élévateur (1) selon la revendication 4, caractérisé en ce que lesdits au moins un premier et au moins un deuxième actionneurs (32 et 34) actionnent respectivement lesdits premier et deuxième organes de blocage (31 et 33) pour tourner avec ledit corps en forme d'arc (40) autour de ladite jambe (3) entre ladite position d'interférence et ladite position de non interférence.
  6. Ponton auto-élévateur (1) selon la revendication 2, caractérisé en ce que les moyens actionneurs de soulèvement (30) desdits moyens de réglage (26) comprennent au moins un troisième cylindre hydraulique (57) relié mécaniquement à l'anneau fixe (28) et comprenant un troisième piston (58) relié mécaniquement à l'anneau mobile (29).
  7. Ponton auto-élévateur (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend une centrale (100) montée sur ladite plate-forme flottante (2) pour fournir la puissance oléodynamique auxdits actionneurs (30, 32, 34) et une première unité de contrôle logique qui est munie de connexions d'entrée pour recevoir des signaux de diagnostic provenant de capteurs correspondants, et des connexions en sortie pour fournir à ladite centrale (100) des signaux de commande pour l'actionnement automatique desdits actionneurs (30, 32, 34) suivant une logique asservie auxdits capteurs, adaptée pour commander des séquences fonctionnelles pour le soulèvement ou l'abaissement de ladite plate-forme (2).
  8. Ponton auto-élévateur (1) selon la revendication 7, caractérisé en ce que ladite première unité de contrôle logique surveille au moyens desdits capteurs la position desdits actionneurs (30, 32, 34) avantageusement réalisés avec des cylindres hydrauliques.
  9. Ponton auto-élévateur (1) selon la revendication 7, caractérisé en ce que lesdits capteurs comprennent des premiers capteurs (102), en particulier de type linéaire et de préférence magnétostrictifs, montés chacun dans la chemise d'un cylindre hydraulique, pour fournir un signal de sortie indicatif de la position prise par le piston à l'intérieur de la chemise du cylindre.
  10. Ponton auto-élévateur (1) selon la revendication 7, caractérisé en ce que lesdits capteurs comprennent des moyens de détection (103) desdits éléments d'ancrage (27) pour déterminer la position relative de ces éléments d'ancrage (27) par rapport auxdits organes de blocage (31, 33) dudit anneau fixe (28) et dudit anneau mobile (29).
  11. Ponton auto-élévateur (1) selon la revendication 10, caractérisé en ce que lesdits moyens de détection (103) comprennent plusieurs deuxièmes capteurs (104), en particulier au nombre de quatre et de type inductif, lesquels sont montés sur le châssis de support (17), alignés le long de l'axe d'extension verticale de ce dernier, lesdits deuxièmes capteurs étant susceptibles d'émettre un signal d'état relatif à la présence ou non de l'élément d'ancrage (27).
  12. Ponton auto-élévateur (1) selon la revendication 11, caractérisé en ce que lesdits deuxièmes capteurs (104) sont disposés en succession en couvrant sensiblement la distance entre deux éléments d'ancrage (27).
  13. Ponton auto-élévateur (1) selon la revendication 7, caractérisé en ce que lesdits capteurs comprennent au moins deux troisièmes capteurs d'inclinaison (105) pour contrôler la planéité de ladite plate-forme flottante (2).
  14. Ponton auto-élévateur (1) selon la revendication 13, caractérisé en ce que la logique de ladite première unité de contrôle pour gérer de manière automatique les opérations de soulèvement et d'abaissement de ladite plate-forme flottante (2) par l'intermédiaire de ladite centrale est assujettie au contrôle préjudiciel hiérarchique de la planéité de la plate-forme détectée au moyen desdits troisièmes capteurs.
  15. Ponton auto-élévateur (1) selon la revendication 8, caractérisé en ce que lesdits capteurs comprennent des transducteurs de pression, disposés à l'intérieur des chemises des cylindres (47, 49 et 57).
EP20100007386 2009-07-17 2010-07-16 Ponton relevable Active EP2275341B1 (fr)

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ITPD2009A000208A IT1400399B1 (it) 2009-07-17 2009-07-17 Pontone autosollevante

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EP2275341A2 EP2275341A2 (fr) 2011-01-19
EP2275341A3 EP2275341A3 (fr) 2011-05-04
EP2275341B1 true EP2275341B1 (fr) 2012-12-26

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KR101411518B1 (ko) * 2012-06-29 2014-07-01 삼성중공업 주식회사 부유식 구조물
KR101346233B1 (ko) * 2012-06-29 2014-01-03 삼성중공업 주식회사 부유식 구조물
KR101399935B1 (ko) * 2012-06-29 2014-05-30 삼성중공업 주식회사 부유식 구조물
SG11201408748TA (en) 2012-06-29 2015-02-27 Samsung Heavy Ind Floating type structure
KR101296668B1 (ko) * 2013-05-28 2013-08-14 엔아이에스컨설턴트 주식회사 해상시추용 승강식 바지선의 플랫폼 수평위치 확인 및 수평유지 장치
JP6855760B2 (ja) * 2015-12-07 2021-04-07 Ｊｆｅエンジニアリング株式会社 自己昇降式水域プラットフォームおよびそれに用いる把持具ならびに水域構造物の施工方法
CN109300353B (zh) * 2016-10-18 2021-07-27 浙江海洋大学 模拟海上作业工况的海洋工程试验平台装置
CN112411547A (zh) * 2019-08-21 2021-02-26 江苏益迩森重工科技有限公司 一种水上平台的定位机构及其水上平台

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US3797256A (en) * 1972-09-08 1974-03-19 Sharp Inc G Jack-up type offshore platform apparatus
US4156577A (en) * 1977-04-15 1979-05-29 Mcmakin Robert G Onshore/offshore method and apparatus for drilling
FR2581020A1 (fr) * 1985-04-24 1986-10-31 Marion Henri Albert Procede de transport et de transfert d'une charge constituee d'un equipement complet d'un pont de plate-forme marine et moyens pour la mise en oeuvre du procede
IL173254A0 (en) * 2006-01-19 2007-03-08 Israel Aerospace Ind Ltd Floating platform
GB0603798D0 (en) * 2006-02-25 2006-04-05 Fulton John M Floating structures
US20080243365A1 (en) * 2007-03-30 2008-10-02 Remedial (Cyprus) Pcl Methods of holding station and mooring and elevating support vessel

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EP2275341A2 (fr) 2011-01-19
ITPD20090208A1 (it) 2011-01-18
IT1400399B1 (it) 2013-05-31

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