EP3446957B1 - Lastkahn mit batteriesystemen zum stranden und zur abschwächung der welleneffekte - Google Patents

Lastkahn mit batteriesystemen zum stranden und zur abschwächung der welleneffekte Download PDF

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Publication number
EP3446957B1
EP3446957B1 EP18188408.1A EP18188408A EP3446957B1 EP 3446957 B1 EP3446957 B1 EP 3446957B1 EP 18188408 A EP18188408 A EP 18188408A EP 3446957 B1 EP3446957 B1 EP 3446957B1
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EP
European Patent Office
Prior art keywords
barge
cylinder
leg
chamber
hull
Prior art date
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Active
Application number
EP18188408.1A
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English (en)
French (fr)
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EP3446957A1 (de
Inventor
Olivier FRESNET
Jérôme JOURDAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saipem SA
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Saipem SA
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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 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/28—Barges or lighters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
    • B63B43/18—Improving safety of vessels, e.g. damage control, not otherwise provided for preventing collision or grounding; reducing collision damage
    • 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
    • E02B17/024—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 shock absorbing means for the supporting construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
    • B63B43/18—Improving safety of vessels, e.g. damage control, not otherwise provided for preventing collision or grounding; reducing collision damage
    • B63B2043/185—Improving safety of vessels, e.g. damage control, not otherwise provided for preventing collision or grounding; reducing collision damage using shock absorbing telescoping buffers

Definitions

  • the present invention relates to the general field of barges used in the petroleum industry, in particular for laying submarine pipes for transporting hydrocarbons, for example oil and gas, from underwater production wells, or for installing cables or for transporting equipment.
  • laying operations require having to anchor the barge on a seabed which can be rocky or coral.
  • the landing of the barge is carried out by directly failing the barge on the seabed during the ebb tide, the hull of the barge being for this purpose reinforced or double bottomed to avoid damaging the barge.
  • stranded barge is meant that the hull thereof rests directly on the seabed.
  • the main object of the present invention is therefore to overcome such drawbacks by proposing a barge which does not need to be grounded on a seabed when it lands.
  • the invention is remarkable in that it uses battery systems on which the hull of the barge rests, these batteries coming alone into contact with the seabed when the barge is stranded (the hull does not come in contact with the seabed). In this way, the landing of the barge is carried out without having to beach the hull directly on the seabed, which avoids having to reinforce the latter or to equip it with a double bottom.
  • the batteries of these systems are equipped with hydraulic and pneumatic circuits to control the output of the batteries when the barge is grounded, to absorb the phenomenon of the barge hitting which can occur in the event of swell, and to retract the batteries in the hull when the barge is floated.
  • the batteries are ordered to make contact with the seabed as quickly as possible in order to limit the time during which the heaving occurs. In the same way, during the rising tide, it is necessary to raise the batteries in the barge hull as quickly as possible to limit the heaving effect on the hull.
  • the battery systems according to the invention require little energy to operate since they are not intended to raise the barge but only to take it back in load (grounding ). In particular, if the drawdown is less than the draft of the barge during its stranding, the weight taken up by the battery systems is less than the weight of the barge.
  • the hydraulic circuit of each battery system comprises a cylinder inside which slides a piston connected to one end of the battery, the piston separating the volume of the cylinder into a lower chamber and a separate upper chamber one of the other, and means for filling with water and emptying the two chambers of the cylinder to descend and reassemble the stack.
  • Such a hydraulic circuit for controlling the raising and lowering of the batteries has the advantage of being non-polluting (in particular compared to an oil circuit), consuming little energy (since it operates by potential energy) and simple to implementation (the water used can be taken directly from the sea).
  • the means for filling with water and emptying the two chambers of the cylinder can comprise a water tank connected to each chamber of the cylinder and pumps interposed between the water tank and each chamber of the cylinder.
  • the means for filling with water and draining the two chambers of the cylinder further comprise a pressure sensor inside the two chambers of the cylinder and a sensor for measuring the flow of water generated by the pumps in order to check the filling speed of the cylinder chambers.
  • the pneumatic circuit of each battery system comprises a waterproof and deformable membrane which is positioned in the upper chamber of the cylinder to delimit inside and above the latter a pneumatic damping chamber, means injecting into the pneumatic damping chamber of the cylinder a compressible gas, and means for controlling the gas pressure inside the pneumatic damping chamber of the cylinder.
  • Such a pneumatic circuit allows the deformable membrane to act as a spring to absorb the heaving due to the effects of the swell.
  • the compressible gas injection means are advantageously connected to the lower chamber of the cylinder in order to provide an additional force during the ascent of the stack and to carry out a total draining of the water out of the lower chamber in case of maintenance operation.
  • each battery system includes its own hydraulic and pneumatic circuit control system.
  • the seabed not necessarily being flat, it is thus possible to ensure that differences in level are taken into account by individually adjusting each battery system to allow the barge to retain its list and its initial trim.
  • battery systems can be controlled not only based on the seabed but also on the distribution of weight on the barge.
  • the barge preferably comprises at least four battery systems distributed at the four corners of the barge.
  • the invention also relates to a method of piloting a barge for laying underwater hydrocarbon transport pipes as defined above, in which, when the barge is stranded, the hydraulic and pneumatic circuits of each battery system are activated to lower the battery out of the hull of the barge and absorb the effects of the swell, and, when the barge is floating, the hydraulic circuit of each battery system is activated to reassemble the battery inside the barge hull.
  • the invention applies to any floating barge used in particular in the petroleum industry for laying submarine pipes or hoses for transporting hydrocarbons and / or for digging trenches in the seabed in order to lay pipes there. underwater.
  • such a barge 2 comprises a hull 4 which rests on a plurality of battery systems 6 for the grounding of the barge and the damping of the effects of the swell.
  • the number of battery systems fitted to a barge depends in particular on the size of the barge. However, at least one battery system should be positioned at the four corners of the hull (which gives a minimum of four battery systems for the barge).
  • each stack system 6 comprises a stack (or foot) 8 forming a support, this stack being able to be lowered out of the hull 4 of the barge (case of the figure 1 ) and to be reassembled inside the hull (case of figure 2 ).
  • the stack 8 is lowered out of the hull during a grounding of the barge in order to come into contact with the seabed 10 (no contact is made between the hull and the seabed). Conversely, the stack is raised inside the hull when the barge is floating.
  • each stack system includes a hydraulic circuit. More specifically, this hydraulic circuit comprises a cylinder 12 formed in the shell 4 of the barge and intended to receive a piston 14 secured to an upper end of the stack 8 (the stack forms the rod of a jack).
  • the piston 14 separates the internal volume of the cylinder 12 into two chambers distinct from each other, namely a lower chamber 16 and an upper chamber 18.
  • the hydraulic circuit also includes means for filling with water and emptying the two chambers 16, 18 of the cylinder in order to lower and raise the stack.
  • the lower 16 and upper 18 chambers of the cylinder are each connected to a water tank 20.
  • the upper chamber 18 is connected to the water reservoir by a first pipe 22 on which is positioned a pump 24 of deployment of the battery.
  • the lower chamber 16 it is connected to the water tank by a second pipe 26.
  • this lower chamber 16 is made impermeable to the external environment by means of a cable gland 29 disposed around the stack 8.
  • the upper chamber 18 of the cylinder is connected to the second pipe 26 by a third pipe 28 on which is positioned a pump 30 for shrinking the battery.
  • the lower chamber 16 of the cylinder is connected to the first pipe 22 by a fourth pipe 32.
  • this hydraulic circuit is as follows. To lower the stack 8 out of the shell, it is necessary both to fill the upper chamber 18 of the cylinder with water and to empty the lower chamber 16 with water. To this end, the pump 24 for deploying the stack is activated to inject water into this upper chamber 18 both from the water tank 20 (via the first line 22) and from the lower chamber (via the fourth line 32).
  • the battery shrinkage pump 30 is activated. to inject water into this lower chamber from the upper chamber (via the second and third lines 26, 28).
  • the activation of the stack 24 and shrink stack 30 pumps is controlled from a cockpit of the barge.
  • the battery deployment pump should be activated to allow the upper chamber of the cylinder to be filled as quickly as possible and thus lower the corresponding battery without delay. In this way, making contact with the seabed is very quickly in order to limit the time during which the heaving due to the effects of the swell occurs.
  • the rate of filling with water of the upper chamber 18 of the cylinder can advantageously be controlled by controlling the pressure difference between the lower and upper chambers of the cylinder and by controlling the flow of water passing through the pumps 24, 30
  • the hydraulic circuit is equipped with a pressure control sensor 34, 36 inside the lower and upper chambers of the cylinder, respectively.
  • the pumps 24, 30 are each fitted with a water flow sensor (which can be more or less closed valves or equipment piloted and controlled remotely).
  • Each battery system 6 further comprises a pneumatic circuit to allow the damping of the effects of the swell on the barge.
  • a waterproof and deformable membrane 38 is positioned in the upper chamber 18 of the cylinder 12 to delimit inside and above the latter a pneumatic damping chamber 40.
  • This pneumatic damping chamber is connected to a source of injection of compressible gas 42, for example nitrogen, via a gas line 46.
  • the pneumatic circuit of each battery system includes a pressure sensor 44 inside the pneumatic damping chamber of the cylinder.
  • Such a pneumatic circuit makes it possible to play the role of shock absorber by storing the mechanical energy of shock due to the effects of the swell in the form of pneumatic pressure. Indeed, in case of swell, the pressure inside the upper chamber 18 of the cylinder increases and this overpressure is transmitted to the deformable membrane 38. The compressibility of the gas filling this chamber thus allows it to play the role spring.
  • the source of injection of compressible gas 42 is also connected to the lower chamber 16 (by a other gas line 48), on the one hand to provide an additional effort by adding gas to this lower chamber in the event of resistance of the battery 8 to return, and on the other hand to effect a total draining of the water in this lower chamber as part of a maintenance operation.
  • the figure 3 shows an example of implementation of a plurality of battery systems 6 equipping a barge 2 according to the invention.
  • the seabed 10 on which the barge runs aground is not perfectly flat.
  • the battery systems 6 are adjusted individually.
  • the descent of the respective stacks 8 of the stack systems is adapted as a function of the differences in sea level and as a function of the distribution of the loads on the barge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (8)

  1. Plattform (2), die einen Rumpf (4) umfasst, der auf mehreren Pfeilersystemen (6) zur Grundverankerung der Plattform und Dämpfung der Auswirkungen des Seegangs ruht, wobei jedes Pfeilersystem umfasst:
    einen Pfeiler (8), der eine Stütze bildet und dazu geeignet ist, ausgehend von dem Rumpf abgesenkt zu werden und wieder in das Innere des Rumpfes angehoben zu werden,
    einen Hydraulikkreis zum Absenken des Pfeilers ausgehend von der Plattform, um ihn bei einer Grundverankerung der Plattform in Kontakt mit dem Meeresboden (10) zu bringen und um ihn wieder in das Innere derselben anzuheben, wenn die Plattform zum Aufschwimmen gebracht wird, dadurch gekennzeichnet, dass sie ferner umfasst
    einen Pneumatikkreis, um die Dämpfung der Auswirkungen des Seegangs auf die Plattform zu erlauben, umfassend:
    einen Zylinder (12), in dessen Innerem ein Kolben (14) gleitet, der mit einem Ende des Pfeilers (8) verbunden ist, wobei der Kolben das Volumen des Zylinders in eine untere Kammer (16) und eine obere Kammer (18), die voneinander verschieden sind, teilt,
    Mittel zum Füllen mit Wasser und zum Drainieren der zwei Kammern des Zylinders, um den Pfeiler abzusenken und wieder anzuheben,
    eine dichte und verformbare Membran (38), die in der oberen Kammer (18) des Zylinders (12) positioniert ist, um im Inneren und über derselben eine pneumatische Dämpfungskammer (40) zu begrenzen,
    Mittel zum Einblasen (42) eines komprimierbaren Gases in die pneumatische Dämpfungskammer des Zylinders, und
    Mittel zur Regelung (44) des Gasdrucks im Inneren der pneumatischen Dämpfungskammer des Zylinders.
  2. Plattform nach Anspruch 1, wobei die Mittel zum Füllen mit Wasser und zum Drainieren der zwei Kammern des Zylinders einen Wassertank (20), der mit jeder Kammer des Zylinders verbunden ist, und Pumpen (24, 30) umfassen, die zwischen dem Wassertank und jeder Kammer des Zylinders angeordnet sind.
  3. Plattform nach Anspruch 2, wobei die Mittel zum Füllen mit Wasser und zum Drainieren der zwei Kammern des Zylinders ferner einen Drucksensor (34, 36) im Inneren der zwei Kammern des Zylinders und einen Sensor zur Messung der von den Pumpen erzeugten Wasserdurchflussrate umfassen, um die Geschwindigkeit der Füllung der Kammern des Zylinders zu regeln.
  4. Plattform nach einem der Ansprüche 1 bis 3, wobei die Mittel zum Einblasen von komprimierbarem Gas (42) mit der unteren Kammer (16) des Zylinders (12) verbunden sind.
  5. Plattform nach einem der Ansprüche 1 bis 4, wobei jedes Pfeilersystem sein eigenes Steuersystem der Hydraulik- und Pneumatikkreise umfasst.
  6. Plattform nach einem der Ansprüche 1 bis 5, die zumindest vier Pfeilersysteme umfasst, die auf die vier Ecken der Plattform verteilt sind.
  7. Plattform nach einem der Ansprüche 1 bis 6, wobei der Rumpf keinen doppelten Boden aufweist.
  8. Verfahren zur Lageregelung einer Plattform nach einem der Ansprüche 1 bis 7, wobei:
    bei einer Grundverankerung der Plattform die Hydraulik- und Pneumatikkreise eines jeden Pfeilersystems aktiviert werden, um den Pfeiler ausgehend von dem Rumpf der Plattform abzusenken und die Auswirkungen des Seegangs zu dämpfen, und
    wenn die Plattform zum Aufschwimmen gebracht wird, der Hydraulikkreis eines jeden Pfeilersystems aktiviert wird, um den Pfeiler wieder in das Innere des Rumpfes der Plattform anzuheben.
EP18188408.1A 2017-08-22 2018-08-10 Lastkahn mit batteriesystemen zum stranden und zur abschwächung der welleneffekte Active EP3446957B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1757804A FR3070365B1 (fr) 2017-08-22 2017-08-22 Barge a systemes de piles pour l'echouage et l'amortissement des effets de la houle

Publications (2)

Publication Number Publication Date
EP3446957A1 EP3446957A1 (de) 2019-02-27
EP3446957B1 true EP3446957B1 (de) 2020-02-26

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EP18188408.1A Active EP3446957B1 (de) 2017-08-22 2018-08-10 Lastkahn mit batteriesystemen zum stranden und zur abschwächung der welleneffekte

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FR (1) FR3070365B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115110504A (zh) * 2022-06-24 2022-09-27 江龙船艇科技股份有限公司 一种自动调平衡液压支腿浮体结构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4848967A (en) * 1988-01-04 1989-07-18 Exxon Production Research Company Load-transfer system for mating an integrated deck with an offshore platform substructure
NO334305B1 (no) * 2011-12-06 2014-02-03 Eab Engineering As Dempesylinder
US10850813B2 (en) * 2015-01-20 2020-12-01 Saipem S.P.A. Supporting system for a floating vessel in shallow or very shallow water

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Publication number Publication date
FR3070365B1 (fr) 2019-09-13
EP3446957A1 (de) 2019-02-27
FR3070365A1 (fr) 2019-03-01

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