EP4053012B1 - Integriertes demontagesystem und demontageverfahren für eine grosse offshore-struktur - Google Patents

Integriertes demontagesystem und demontageverfahren für eine grosse offshore-struktur Download PDF

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Publication number
EP4053012B1
EP4053012B1 EP20910667.3A EP20910667A EP4053012B1 EP 4053012 B1 EP4053012 B1 EP 4053012B1 EP 20910667 A EP20910667 A EP 20910667A EP 4053012 B1 EP4053012 B1 EP 4053012B1
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EP
European Patent Office
Prior art keywords
semi
lifting arms
lifting
submersible vessel
offshore structure
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EP20910667.3A
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English (en)
French (fr)
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EP4053012A4 (de
EP4053012A1 (de
Inventor
Jianying BAO
Xianfu ZHAO
Bing Yu
Yadong Li
Yuanhui SUN
Xiquan Liu
Yunfeng Li
Peng XIN
Tao Lv
Xiaohui LV
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Shandong Marine Energy Co Ltd
Shandong Offshore Equipment Co Ltd
Shandong Offshore Research Institute Co Ltd
Original Assignee
Shandong Marine Energy Co Ltd
Shandong Offshore Equipment Co Ltd
Shandong Offshore Research Institute Co Ltd
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Priority claimed from CN201911394244.1A external-priority patent/CN111038662A/zh
Priority claimed from CN201922435538.6U external-priority patent/CN211364878U/zh
Application filed by Shandong Marine Energy Co Ltd, Shandong Offshore Equipment Co Ltd, Shandong Offshore Research Institute Co Ltd filed Critical Shandong Marine Energy Co Ltd
Publication of EP4053012A1 publication Critical patent/EP4053012A1/de
Publication of EP4053012A4 publication Critical patent/EP4053012A4/de
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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 
    • B63B75/00—Building or assembling floating offshore structures, e.g. semi-submersible platforms, SPAR platforms or wind turbine platforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/10—Arrangement of ship-based loading or unloading equipment for cargo or passengers of cranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C7/00—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects
    • B63C7/006—Emptying the contents of sunken, stranded, or disabled vessels, e.g. by engaging the vessel; Underwater collecting of buoyant contents, such as liquid, particulate or gaseous contents, escaping from sunken vessels, e.g. using funnels, or tents for recovery of escaping hydrocarbons

Definitions

  • the present disclosure relates to an integrated disassembling and assembling system for a large offshore structure and a disassembling and assembling method, and belongs to the technical field of ocean engineering.
  • a blocked hoisting method and a single-vessel float-over method are usually used to disassemble or assemble these facilities.
  • the blocked hoisting method requires offshore overall docking and system debugging, which take a long time.
  • offshore debugging costs are far higher than onshore debugging costs.
  • the single-vessel float-over method has a great limitation on an ultra-large offshore platform exceeding 10,000 tons. First, weight of the ultra-large offshore platform is limited by loading capacity of a single vessel. Second, applicability of the single-vessel float-over method is limited by a platform span, a support structure, space, and the like.
  • the present disclosure provides an integrated disassembling and assembling system for a large offshore structure and a disassembling and assembling system to implement lifting jointly through fast de-ballasting for an entire vessel and fast lifting of hydraulic systems of lifting arms, such that an entire disassembling process takes a short time and has high efficiency.
  • the system and process according to the invention are described in claims 1 and 8.
  • the integrated disassembling and assembling system for a large offshore structure includes a semi-submersible vessel I, a semi-submersible vessel II, multiple lifting arms I, multiple lifting arms II, and an offshore structure.
  • a support I and a support II for the lifting arms I are mounted on the semi-submersible vessel I through bolts.
  • a support I and a support II for the lifting arms II are mounted on the semi-submersible vessel II through bolts.
  • the lifting arms I are arranged on the semi-submersible vessel I in parallel.
  • the lifting arms II are arranged on the semi-submersible vessel II in parallel.
  • the lifting arms I and the lifting arms II are provided with a lifting system having a three-way motion compensation function.
  • the lifting system is provided with locking mechanisms for the lifting arms I and the lifting arms II. Before lifting, the locking mechanisms lock the lifting arms I and the lifting arms II are in a front-back direction and a left-right direction; then, a lifting mechanism may lift the offshore structure up.
  • the lifting system having the three-way motion compensation function further include a mobile cart I and a mobile cart II.
  • a bottom at a front end of each of the lifting arms I/lifting arms II is mounted at an upper end of the mobile cart I.
  • a rear end of each of the lifting arms I/lifting arms II is mounted at an upper end of the mobile cart II.
  • a lower end of the mobile cart I is mounted on the support I.
  • a lower end of the mobile cart II is mounted on the support II.
  • the support I and the support II are respectively fixed on the semi-submersible vessel I and the semi-submersible vessel II.
  • the lifting mechanism for driving a lifted object to move up and down is hinged to the front end of each of the lifting arms I/lifting arms II.
  • a road wheel set and a road wheel are mounted on each of the mobile cart I and the mobile cart II.
  • the road wheel set is mounted on rails that are of the lifting arms I/lifting arms II and are used for limiting up-down movement of a main arm.
  • the road wheel is mounted on a rail of the support I or the support II.
  • the lifting arms I/lifting arms II move left and right through the road wheel set, and move front and back through the road wheel.
  • a locking mechanism meshed with a fixing rack of each of the lifting arms I/lifting arms II is mounted at the upper end of the mobile cart I; a locking mechanism meshed with a fixing rack of the support I is mounted at the lower end of the mobile cart I.
  • each of the locking mechanisms includes a locking rack whose section takes the shape of an inverted trapezoid.
  • the locking rack is disposed on a side of the fixing rack.
  • Two adjustment hydraulic cylinders are hinged to a bottom of the locking rack.
  • a structure defined by the adjustment hydraulic cylinders has a certain included angle and takes the shape of inverted V.
  • Two locking sliders are movably disposed on a left side and a right side of the locking rack.
  • Each of the locking sliders slides uni-directionally along a slide rail and is provided with an inclined surface matched with the locking rack.
  • the adjustment hydraulic cylinders push the locking rack into the fixing rack; the locking rack and the fixing rack are meshed with each other.
  • the inclined surfaces of the two locking sliders are fitted with inclined surfaces of the locking rack.
  • a dynamic positioning (DP) system is provided on each of the semi-submersible vessel I and the semi-submersible vessel II that are respectively disposed on two sides of the offshore structure.
  • DP dynamic positioning
  • the lifting mechanism is static relative to the offshore structure before the DP systems having a positioning function and the lifting arms having a compensation function jointly implement lifting.
  • the integrated disassembling and assembling system further includes a semi-submersible vessel III.
  • the lifting arms of the semi-submersible vessel I and the semi-submersible vessel II act simultaneously to unload the offshore structure to the semi-submersible vessel III.
  • controllable cabins are provided on each of the semi-submersible vessel I and the semi-submersible vessel II, and a waterline of each of the cabins is controlled by a pneumatic pump.
  • the cabins include a bottom cabin, as well as a middle cabin, a left cabin, and a right cabin that are disposed above the bottom cabin; each of the left cabin and the right cabin includes a high-position cabin and a low-position cabin.
  • the disassembling and assembling method for the integrated disassembling and assembling system for a large offshore structure in the present disclosure may include the following steps:
  • an integrated disassembling and assembling system for a large offshore structure includes a semi-submersible vessel I 1, a semi-submersible vessel II 3, multiple lifting arms I 2, multiple lifting arms II 4, and an offshore structure 5, where a support 16 and a support II 7 for the lifting arms I 2 are mounted on the semi-submersible vessel I 1 through bolts.
  • a support I 6 and a support II 7 for the lifting arms II 4 are mounted on the semi-submersible vessel II 3 through bolts.
  • the lifting arms I 2 are arranged on the semi-submersible vessel I 1 in parallel; the lifting arms II 4 are arranged on the semi-submersible vessel II 3 in parallel.
  • the lifting arms I 2 and the lifting arms II 4 are provided with a lifting system having a three-way motion compensation function.
  • the lifting system is provided with locking mechanisms for the lifting arms I 2 and the lifting arms II 4. Before lifting, the locking mechanisms lock the lifting arms I 2 and the lifting arms II 4 in a front-back direction and a left-right direction, and then, a lifting mechanism 8 lifts the offshore structure 5 up.
  • the lifting system having the three-way motion compensation function further includes a mobile cart 110 and a mobile cart II 11, where a bottom at a front end of each of the lifting arms I 2/lifting arms II 4 is mounted at an upper end of the mobile cart I 10.
  • a rear end of each of the lifting arms I 2/lifting arms II 4 is mounted at an upper end of the mobile cart II 11.
  • a lower end of the mobile cart I 10 is mounted on the support 16.
  • a lower end of the mobile cart II 11 is mounted on the support II 7.
  • the support I 6 and the support II 7 are respectively fixed on the semi-submersible vessel I 1 and the semi-submersible vessel II 3.
  • the lifting mechanism 8 for driving a lifted object to move up and down is hinged to the front end of each of the lifting arms I 2/lifting arms II 4.
  • a road wheel set and a road wheel are mounted on each of the mobile cart 110 and the mobile cart II 11.
  • the road wheel set is mounted on rails that are on the lifting arms I 2/lifting arms II 4 and are used for limiting up-down movement of a main arm.
  • the road wheel is mounted on a rail of the support 16 or the support II 7.
  • the lifting arms I 2/lifting arms II 4 move left and right through the road wheel set and move front and back through the road wheel.
  • a locking mechanism meshed with a fixing rack 13 of each of the lifting arms I 2/lifting arms II 4 is mounted at the upper end of the mobile cart I 10.
  • a locking mechanism meshed with a fixing rack 13 of the support I 6 is mounted at the lower end of the mobile cart 110.
  • each of the locking mechanisms includes a locking rack 12 whose section takes the shape of an inverted trapezoid, where the locking rack 12 is disposed on a side of the fixing rack 13.
  • Two adjustment hydraulic cylinders 14 are hinged to a bottom of the locking rack 12.
  • a structure defined by the adjustment hydraulic cylinders has a certain included angle and takes the shape of inverted V.
  • Two locking sliders 15 are movably disposed on a left side and a right side of the locking rack 12.
  • Each of the locking sliders 15 slides uni-directionally along a slide rail and is provided with an inclined surface matched with the locking rack 12.
  • the adjustment hydraulic cylinders 14 push the locking rack 12 into the fixing rack 13; the locking rack 12 and the fixing rack 13 are meshed with each other.
  • the inclined surfaces of the two locking sliders 15 are fitted with inclined surfaces of the locking rack 12.
  • a dynamic positioning (DP) system is provided on each of the semi-submersible vessel I 1 and the semi-submersible vessel II 3 that are respectively disposed on two sides of the offshore structure 5.
  • the lifting mechanism 8 is static relative to the offshore structure 5 before the DP systems having a positioning function and the lifting arms having a compensation function jointly implement lifting.
  • the integrated disassembling and assembling system further includes a semi-submersible vessel III 9.
  • the lifting arms of the semi-submersible vessel I 1 and the semi-submersible vessel II 3 act simultaneously to unload the offshore structure 5 to the semi-submersible vessel III 9.
  • Multiple controllable cabins are provided on each of the semi-submersible vessel I 1 and the semi-submersible vessel II 3, and a waterline of each of the cabins is controlled by a pneumatic pump.
  • the cabins include a bottom cabin, as well as a middle cabin, a left cabin, and a right cabin that are disposed above the bottom cabin; each of the left cabin and the right cabin includes a high-position cabin and a low-position cabin.
  • a process of using the system is as follows: To disassemble the offshore structure 5, the semi-submersible vessel I 1 and the semi-submersible vessel II 3 approach the offshore structure 5 from two sides. The two semi-submersible vessels are positioned relative to the offshore structure 5 by using the DP systems of the semi-submersible vessels. The lifting arms I 2 and the lifting arms II 4 reach a lifting point of the offshore structure 5 through front-back and left-right movements. Because the positioning function of the DP systems of the semi-submersible vessels is insufficient to make the offshore structure 5 static, a three-way compensation function of the lifting arms needs to be enabled at this time.
  • the semi-submersible vessel I 1 and the semi-submersible vessel II 3 are de-ballasted, such that 5% of the load of the offshore structure is transferred to the lifting arms and the semi-submersible vessels.
  • the locking mechanisms lock the lifting arms I 2 and lifting arms II 4 in the front-back direction and the left-right direction; and then, the lifting mechanism 8 lifts the offshore structure 5 up fast.
  • the semi-submersible vessel I 1 and the semi-submersible vessel II 3 carry the offshore structure 5 and move synchronously to leave a supporting position of the offshore structure 5.
  • the semi-submersible vessel III 9 moves to a position between the semi-submersible vessel I 1 and the semi-submersible vessel II 3; and then, the lifting arms of the semi-submersible vessel I 1 and the semi-submersible vessel II 3 synchronously unload, to the semi-submersible vessel III 9, the offshore structure 5 that has been disassembled.
  • the semi-submersible vessel III 9 carrying the offshore structure 5 moves to a wharf and slides ashore.
  • An objective of the present disclosure is to provide an integrated disassembling and assembling method for a large offshore structure 5, which can implement disassembling or assembling of offshore structures 5, such as a jacket platform, a pile group platform, or a column leg platform, and is particularly suitable for disassembling or assembling an ultra-large platform block that exceeds one ton.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Wind Motors (AREA)
  • Ship Loading And Unloading (AREA)

Claims (8)

  1. Integriertes Demontage- und Montagesystem für eine große Offshore-Struktur, umfassend
    ein halbtauchfähiges Schiff I (1),
    ein halbtauchfähiges Schiff II (3),
    mehrere Hubarme I (2), mehrere Hubarme II (4) und
    eine Offshore-Struktur (5), dadurch gekennzeichnet, dass
    ein Träger I (6) und ein Träger II (7) für die Hubarme I (2) durch Bolzen an dem halbtauchfähigen Schiff 1 (1) montiert sind;
    ein Träger I (6) und ein Träger II (7) für die Hubarme II (4) durch Bolzen an dem halbtauchfähigen Schiff II (3) montiert sind;
    die Hubarme I (2) parallel an dem halbtauchfähigen Schiff I (1) angeordnet sind;
    die Hubarme II (4) parallel an dem halbtauchfähigen Schiff II (3) angeordnet sind;
    die Hubarme I (2) und die Hubarme II (4) mit einem Hubsystem mit einer Drei-Wege-Bewegungskompensationsfunktion versehen sind;
    das Hubsystem mit Arretiermechanismen versehen ist;
    vor dem Anheben die Arretiermechanismen dazu eingerichtet sind, die Hubarme I (2) und die Hubarme II (4) in einer Vome-Hinten-Richtung und einer Links-Rechts-Richtung zu arretieren, und ein Hubmechanismus (8) dazu eingerichtet ist, die Offshore-Struktur (5) anzuheben;
    das Hubsystem mit der Drei-Wege-Bewegungskompensationsfunktion ferner
    einen mobilen Wagen I (10) und
    einen mobilen Wagen II (11) umfasst;
    ein Boden an einem vorderen Ende sowohl der Hubarme I (2) als auch der Hubarme II (4) an einem oberen Ende des mobilen Wagens I (10) montiert ist;
    ein hinteres Ende sowohl der Hubarme I (2) als auch der Hubarme II (4) an einem oberen Ende des mobilen Wagens II (11) montiert ist;
    ein unteres Ende des mobilen Wagens I (10) an dem Träger I (6) montiert ist;
    ein unteres Ende des mobilen Wagens II (11) an dem Träger II (7) montiert ist;
    der Träger I (6) an dem halbtauchfähigen Schiff I (1) und der Träger II (7) an dem halbtauchfähigen Schiff II (3) befestigt ist; und
    der Hubmechanismus (8) dazu eingerichtet ist, ein angehobenes Objekt dazu anzutreiben, sich nach oben und unten zu bewegen, und an dem vorderen Ende sowohl der Hubarme I (2) als auch der Hubarme II (4) angelenkt ist;
    sowohl an dem mobilen Wagen I (10) als auch an dem mobilen Wagen II (11) ein Straßenradsatz und ein Straßenrad montiert sind;
    der Straßenradsatz an Schienen der Hubarme I (2) und der Hubarme II (4) montiert ist und die Schienen dazu eingerichtet sind, eine Auf-Ab-Bewegung eines Hauptarms zu begrenzen;
    das Straßenrad an einer Schiene des Trägers I (6) oder des Trägers II (7) montiert ist; und sich die Hubarme I (2) und die Hubarme II (4) durch den Straßenradsatz nach links und rechts bewegen und sich durch das Straßenrad nach vorne und hinten bewegen; und
    ein Arretiermechanismus, der mit einer Fixierzahnstange (13) sowohl der Hubarme I (2) als auch der Hubarme II (4) in Eingriff steht, am oberen Ende des mobilen Wagens I (10) montiert ist; und
    ein Arretiermechanismus, der mit einer Fixierzahnstange (13) des Trägers I (6) in Eingriff steht, am unteren Ende des mobilen Wagens I (10) montiert ist.
  2. Integriertes Demontage- und Montagesystem für eine große Offshore-Struktur nach Anspruch 1, dadurch gekennzeichnet, dass
    jeder der Arretiermechanismen eine Arretierzahnstange (12) mit einer Form eines umgekehrten Trapezes umfasst;
    die Arretierzahnstange (12) auf einer Seite der Fixierzahnstange (13) angeordnet ist;
    zwei Einstellhydraulikzylinder (14) an einem Boden der Arretierzahnstange (12) angelenkt sind;
    eine durch die Einstellhydraulikzylinder definierte Struktur einen bestimmten eingeschlossenen Winkel aufweist und die Form eines umgekehrten V annimmt;
    zwei Arretierschieber (15) beweglich auf einer linken Seite und einer rechten Seite der Arretierzahnstange (12) angeordnet sind;
    jeder der Arretierschieber (15) unidirektional entlang einer Gleitschiene gleitet und mit einer schrägen Oberfläche versehen ist, die mit der Arretierzahnstange (12) zusammenpasst;
    die Einstellhydraulikzylinder (14) die Arretierzahnstange (12) in die Fixierzahnstange (13) drücken;
    die Arretierzahnstange (12) und die Fixierzahnstange (13) miteinander vermascht sind;
    sich die zwei Arretierschieber (15) der Arretierzahnstange (12) nähern; und
    die schrägen Oberflächen der zwei Arretierschieber (15) dazu eingerichtet sind, mit schrägen Oberflächen der Arretierzahnstange (12) zusammenzupassen.
  3. Integriertes Demontage- und Montagesystem für eine große Offshore-Struktur nach Anspruch 1, dadurch gekennzeichnet, dass
    sowohl an dem halbtauchfähigen Schiff I (1) als auch an dem halbtauchfähigen Schiff II (3), die auf beiden Seiten der Offshore-Struktur (5) angeordnet sind, ein dynamisches Positionierungssystem (DP) bereitgestellt ist.
  4. Integriertes Demontage- und Montagesystem für eine große Offshore-Struktur nach Anspruch 3, dadurch gekennzeichnet, dass der Hubmechanismus (8) in Bezug auf die Offshore-Struktur (5) statisch ist, bevor die DP-Systeme, die eine Positionierungsfunktion ausführen, und die Hubarme, die eine Kompensationsfunktion ausführen, gemeinsam ein Anheben implementieren.
  5. Integriertes Demontage- und Montagesystem für eine große Offshore-Struktur nach Anspruch 1, dadurch gekennzeichnet, dass das integrierte Demontage- und Montagesystem ferner
    ein halbtauchfähiges Schiff III (9) umfasst; und
    die Hubarme des halbtauchfähigen Schiffs I (1) und des halbtauchfähigen Schiffs II (3) dazu eingerichtet sind, gleichzeitig zu wirken, um die Offshore-Struktur (5) auf das halbtauchfähige Schiff III (9) zu entladen.
  6. Integriertes Demontage- und Montagesystem für eine große Offshore-Struktur nach Anspruch 1, dadurch gekennzeichnet, dass
    sowohl an dem halbtauchfähigen Schiff I (1) als auch an dem halbtauchfähigen Schiff II (3) steuerbare Kabinen vorgesehen sind; und
    eine Wasserlinie jeder der steuerbaren Kabinen durch eine pneumatische Pumpe gesteuert wird.
  7. Integriertes Demontage- und Montagesystem für eine große Offshore-Struktur nach Anspruch 6, dadurch gekennzeichnet, dass die steuerbaren Kabinen eine untere Kabine, eine mittlere Kabine, eine linke Kabine und eine rechte Kabine umfassen, wobei die mittlere Kabine, die linke Kabine und die rechte Kabine über der unteren Kabine angeordnet sind;
    und sowohl die linke Kabine als auch die rechte Kabine eine Kabine mit hoher Position und eine Kabine mit niedriger Position umfasst.
  8. Demontage- und Montageverfahren auf der Grundlage des integrierten Demontage- und Montagesystems für eine große Offshore-Struktur nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    schritt 1: vor dem gemeinsamen Anheben, Ballastieren des halbtauchfähigen Schiffs I (1) und des halbtauchfähigen Schiffs II (3), um eine spezifizierte Wasserlinie zu erreichen;
    schritt 2: wenn das gemeinsame Anheben beginnt, schnelles Entballastieren des halbtauchfähigen Schiffs I (1) und des halbtauchfähigen Schiffs II (3) unter Verwendung der pneumatischen Pumpen, so dass 90 % des Gewichts der Offshore-Struktur (5) getragen werden können, ohne eine Wasserlinie eines gesamten Schiffs zu ändern;
    schritt 3: während des gemeinsamen Anhebens, sofortiges Anheben der Offshore-Struktur (5) auf eine spezifizierte Höhe unter Verwendung der Hubarme I (2) und der Hubarme II (4) des halbtauchfähigen Schiffs I (1) und des halbtauchfähigen Schiffs II (3), wobei zu diesem Zeitpunkt unter der Wirkung der aerodynamischen Kraft und der Wasserschwerkraft Ballastwasser von den Kabinen mit hoher Position zu den Kabinen mit niedriger Position übertragen wird, um die Offshore-Struktur (5) und das gesamte Schiff zu nivellieren; und
    schritt 4: schnelles Übertragen von Ballastwasser von den Kabinen mit hoher Position zu den Kabinen mit niedriger Position, wenn die Offshore-Struktur (5) entladen wird, um das gesamte Schiff in einem nivellierten Zustand zu halten.
EP20910667.3A 2019-12-30 2020-12-14 Integriertes demontagesystem und demontageverfahren für eine grosse offshore-struktur Active EP4053012B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201911394244.1A CN111038662A (zh) 2019-12-30 2019-12-30 大型海上结构物一体化拆装系统及拆装方法
CN201922435538.6U CN211364878U (zh) 2019-12-30 2019-12-30 大型海上结构物一体化拆装系统
PCT/CN2020/136068 WO2021135903A1 (zh) 2019-12-30 2020-12-14 大型海上结构物一体化拆装系统及拆装方法

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EP4053012A1 EP4053012A1 (de) 2022-09-07
EP4053012A4 EP4053012A4 (de) 2023-01-18
EP4053012B1 true EP4053012B1 (de) 2024-02-21

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CN110155273B (zh) * 2019-05-23 2020-10-09 大连海事大学 立式双驳抬撬钢绞线液压同步提升沉船打捞系统
CN211364878U (zh) * 2019-12-30 2020-08-28 山东海洋能源有限公司 大型海上结构物一体化拆装系统
CN111038662A (zh) * 2019-12-30 2020-04-21 山东海洋能源有限公司 大型海上结构物一体化拆装系统及拆装方法

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