CN211364878U - Integrated dismounting system for large offshore structure - Google Patents
Integrated dismounting system for large offshore structure Download PDFInfo
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- CN211364878U CN211364878U CN201922435538.6U CN201922435538U CN211364878U CN 211364878 U CN211364878 U CN 211364878U CN 201922435538 U CN201922435538 U CN 201922435538U CN 211364878 U CN211364878 U CN 211364878U
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Abstract
The utility model relates to a large-scale offshore structure thing integration dismouting system belongs to ocean engineering technical field. The utility model comprises a semi-submersible ship I, a semi-submersible ship II, a lifting arm I, a lifting arm II and an offshore structure, wherein a support I and a support II of the lifting arm I are arranged on the semi-submersible ship I through bolts, and a support I and a support II of the lifting arm II are arranged on the semi-submersible ship II through bolts; a plurality of lifting arms I are arranged on the semi-submersible ship I in parallel, and a plurality of lifting arms II are arranged on the semi-submersible ship II in parallel; the lifting arm I and the lifting arm II are provided with lifting systems with three-way movement compensation functions, and the lifting systems are provided with locking mechanisms; before lifting, the lifting arm I and the lifting arm II are locked by the locking mechanism in the front-back direction and the left-right direction; the lifting mechanism acts simultaneously to lift the offshore structure. The utility model discloses a quick row of hull carries and lifts the quick completion of lifting arm hydraulic system and lifts the operation jointly, makes the whole time spent short of disassembling the process, and is efficient.
Description
Technical Field
The utility model relates to a large-scale offshore structure thing integration dismouting system belongs to ocean engineering technical field.
Background
At present, offshore small oil field facilities in the world have mature disassembling and installing modes, and the disassembling and the installing are generally carried out by adopting a floating crane hoisting operation mode. However, the mainstream offshore oil field facilities represented by the north sea in europe have the characteristics of large size and complexity, and the block hoisting and single ship floating method is generally adopted for disassembling or installing the facilities. The block hoisting needs integral butt joint and system debugging on the sea, the required time is long, and the cost for debugging on the sea is far higher than that for debugging on the land. The single-ship floating method has great limitation on the ultra-large ocean platform with the weight of more than 10000 tons. First, it is limited by the load of a single vessel, and in addition, the platform span, support structure, space, etc. limit the wide applicability of the single vessel floatover process.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect that prior art exists, the utility model provides a large-scale marine structure thing integration dismouting system carries and lifts the quick completion of arm hydraulic system and lift the operation jointly through the quick row of hull, makes the whole time spent of disassembling the process short, efficient.
The utility model discloses a large-scale offshore structure thing integration dismouting system, including semi-submerged ship I, semi-submerged ship II, lift arm I, lift arm II and offshore structure thing, the support I and the support II of lift arm I are installed on semi-submerged ship I through the bolt, and support I and the support II of lift arm II are installed on semi-submerged ship II through the bolt; a plurality of lifting arms I are arranged on the semi-submersible ship I in parallel, and a plurality of lifting arms II are arranged on the semi-submersible ship II in parallel; the lifting arm I and the lifting arm II are provided with lifting systems with three-way movement compensation functions, and the lifting systems are provided with locking mechanisms; before lifting, the lifting arm I and the lifting arm II are locked by the locking mechanism in the front-back direction and the left-right direction; the lifting mechanism acts simultaneously to lift the offshore structure.
Preferably, the lifting system with the three-way movement compensation function further comprises a moving trolley I and a moving trolley II, the bottom of the front end of a lifting arm I/II is installed at the upper end of the moving trolley I, the rear end of the lifting arm I/II is installed at the upper end of the moving trolley II, the lower end of the moving trolley I is installed on a support I, the lower end of the moving trolley II is installed on a support II, and the support I and the support II are respectively fixed on the semi-submersible ship I and the semi-submersible ship II; the lifting mechanism driving the lifting object to move up and down is hinged to the front end of the lifting arm I/II.
Preferably, the travelling wheel sets and travelling wheels are arranged on the travelling trolley I and the travelling trolley II, wherein the travelling wheel sets are arranged in a track of the lifting arm I/the lifting arm II which plays a role of restraining the main arm up and down, and the travelling wheels are arranged on the track of the support I or the support II; the lifting arm I/the lifting arm II moves left and right through the traveling wheel set; the lifting arm I/II moves back and forth through the travelling wheels;
a locking mechanism meshed with a fixed rack of the lifting arm I/the lifting arm II is installed at the upper end of the movable trolley I, and a locking mechanism meshed with the fixed rack of the lifting support I is installed at the lower end of the movable trolley I.
Preferably, the locking mechanism comprises a locking rack with an inverted trapezoidal section, the locking rack is positioned on one side of the fixed rack, two adjusting hydraulic cylinders are hinged to the bottom of the locking rack, and the adjusting hydraulic cylinders are arranged in a splayed shape with a certain included angle; the locking rack is movably provided with two locking sliding blocks left and right, the locking sliding blocks slide along the slideway in a single direction, and inclined planes matched with the locking rack are arranged on the locking sliding blocks; the locking rack is pushed into the fixed rack by the adjusting hydraulic cylinder, the locking rack is meshed with the fixed rack, the two locking sliders are close to the locking rack, and the inclined planes of the two locking sliders are attached to the inclined plane of the locking rack.
Preferably, DP systems are installed on the semi-submersible ship I and the semi-submersible ship II, and the semi-submersible ship I and the semi-submersible ship II are respectively positioned on two sides of the offshore structure.
Preferably, the DP system positioning and the compensating functions of the lifting arm together achieve that the lifting mechanism is stationary relative to the offshore structure prior to lifting.
Preferably, the integrated disassembly and assembly system further comprises a semi-submersible vessel III, and the lifting arms on the semi-submersible vessel I and the semi-submersible vessel II act simultaneously to unload the offshore structure onto the semi-submersible vessel III.
Preferably, the semi-submersible ship I and the semi-submersible ship II are provided with a plurality of controllable cabin bodies, and the draft of the cabin bodies is controlled by a pneumatic pump.
Preferably, the cabin body is divided into a bottom cabin body, and a middle cabin body, a left cabin body and a right cabin body which are positioned above the bottom cabin body, wherein the left cabin body and the right cabin body are further divided into a high cabin and a low cabin.
The utility model discloses the use as follows:
the method comprises the following steps: before combined lifting, ballasting the semi-submersible ship I and the semi-submersible ship II to reach the specified draft;
step two: the combined lifting starts, and the whole ship bears 90% of the weight of the lifted offshore structure under the condition of unchanged draft through pneumatic rapid load discharge;
step three: during combined lifting, a lifting arm I and a lifting arm II on a semi-submersible ship I and a semi-submersible ship II instantaneously lift the offshore structure to a specified height, and simultaneously, ballast water is transferred from a high-level tank to a low-level tank by pneumatic gravity falling water, so that the offshore structure and the ship body are leveled;
step four: in the process of unloading the offshore structure, the ship body is always kept in a leveling state by quickly transferring ballast water from the high-level tank to the low-level tank.
The utility model has the advantages that:
(1) the utility model discloses by two boats combined action, theoretically do not receive the restriction of marine structure thing size.
(2) The utility model discloses two lifting arm quantity on the ship can be according to the weight of marine structure thing, and the adjustment lifts arm extension length and the position of locating, can be according to structure, the space adjustment of marine structure thing.
(3) The utility model discloses a DP system location and the compensation function who rises the arm that semi-submerged ship is from area realize before lifting jointly that offshore structure thing is static for offshore structure thing.
(4) The utility model discloses lift the arm and pass through bolt fixed mounting with the hull, when not needing the dismouting, can dismantle and lift the arm, semi-submerged ship can regard as the transport ship to use.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of a lifting system with a three-way motion compensation function.
Fig. 3 is a perspective view of the upper portion of the traveling carriage i.
Fig. 4 is a perspective view of the bottom of the traveling carriage i.
Fig. 5 is a schematic view of the structure of the locking mechanism.
FIG. 6 is one of the state diagrams of a semi-submersible vessel I and a semi-submersible vessel II.
FIG. 7 is a second state diagram of the semi-submersible vessel I and the semi-submersible vessel II.
Fig. 8 is a state diagram of the semi-submersible vessel iii.
Fig. 9(a) to 9(d) are state diagrams of different steps of ballast water load adjustment.
In the figure: 1. a semi-submersible ship I; 2. a lifting arm I; 3. a semi-submersible vessel II; 4. a lifting arm II; 5. an offshore structure; 6. a support I; 7. a support II; 8. a lifting mechanism; 9. a semi-submersible vessel III; 10. moving a trolley I; 11. moving the trolley II; 12. locking the rack; 13. fixing a rack; 14. adjusting the hydraulic cylinder; 15. and locking the sliding block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
as shown in fig. 1 to 8, the semi-submersible vehicle comprises a semi-submersible vehicle I1, a semi-submersible vehicle II 3, a lifting arm I2, a lifting arm II 4 and an offshore structure 5, wherein a support I6 and a support II 7 of the lifting arm I2 are mounted on the semi-submersible vehicle I1 through bolts, and a support I6 and a support II 7 of the lifting arm II 4 are mounted on the semi-submersible vehicle II 3 through bolts; a plurality of lifting arms I2 are arranged on the semi-submersible vessel I1 in parallel, and a plurality of lifting arms II 4 are arranged on the semi-submersible vessel II 3 in parallel; the lifting arm I2 and the lifting arm II 4 are provided with lifting systems with three-way movement compensation functions, and the lifting systems are provided with locking mechanisms; before lifting, the lifting arm I2 and the lifting arm II 4 are locked by the locking mechanism, and the lifting arm I2 and the lifting arm II 4 are locked in the front-back direction and the left-right direction; the lifting mechanism 8 simultaneously operates to lift the offshore structure 5.
As shown in fig. 2, the lifting system with the three-way movement compensation function further comprises a movable trolley I10 and a movable trolley II 11, the bottom of the front end of a lifting arm I2/lifting arm II 4 is installed at the upper end of the movable trolley I10, the rear end of the lifting arm I2/lifting arm II 4 is installed at the upper end of the movable trolley II 11, the lower end of the movable trolley I10 is installed on a support I6, the lower end of the movable trolley II 11 is installed on a support II 7, and the support I6 and the support II 7 are respectively fixed on a semi-submersible ship I1 and a semi-submersible ship II 3; the lifting mechanism 8 driving the lifting object to move up and down is hinged at the front end of the lifting arm I2/the lifting arm II 4.
As shown in fig. 3 and 4, the travelling wheel sets and travelling wheels are mounted on the travelling trolley i 10 and the travelling trolley ii 11, wherein the travelling wheel sets are mounted in a track of the lifting arm i 2/the lifting arm ii 4 which plays a role of vertically constraining the main arm, and the travelling wheels are mounted on a track of the support i 6 or the support ii 7; the lifting arm I2/the lifting arm II 4 moves left and right through the traveling wheel set; the lifting arm I2/the lifting arm II 4 moves back and forth through the travelling wheels; the upper end of the movable trolley I10 is provided with a locking mechanism which is meshed with the fixed rack 13 of the lifting arm I2/lifting arm II 4, and the lower end of the movable trolley I10 is provided with a locking mechanism which is meshed with the fixed rack 13 of the lifting support I6.
As shown in fig. 5, the locking mechanism includes a locking rack 12 with an inverted trapezoidal cross section, the locking rack 12 is located on one side of a fixed rack 13, two adjusting hydraulic cylinders 14 are hinged to the bottom of the locking rack 12, and the adjusting hydraulic cylinders are arranged in a splayed shape with a certain included angle therebetween; the locking rack 12 is movably provided with two locking sliders 15 at left and right, the locking sliders 15 slide along the slide way in one direction, and inclined planes matched with the locking rack 12 are arranged; the locking rack 12 is pushed into the fixed rack 13 by the adjusting hydraulic cylinder 14, the locking rack 12 is meshed with the fixed rack 13, the two locking sliders 15 approach the locking rack 12, and the inclined surfaces of the two locking sliders 15 are attached to the inclined surface of the locking rack 12.
As shown in fig. 6, DP systems are installed on the semi-submersible vessel i 1 and the semi-submersible vessel ii 3, and the semi-submersible vessel i 1 and the semi-submersible vessel ii 3 are respectively positioned at two sides of the offshore structure 5.
The DP system positioning and the compensating functions of the lifting arm together achieve that the offshore structure 5 is stationary relative to the offshore structure 5 prior to lifting.
As shown in fig. 7 to 8, the integrated disassembling and assembling system further comprises a semi-submersible vessel iii 9, and the lifting arms on the semi-submersible vessel i 1 and the semi-submersible vessel ii 3 are simultaneously operated to unload the offshore structure 5 onto the semi-submersible vessel iii 9.
A plurality of controllable cabin bodies are installed on the semi-submersible ship I1 and the semi-submersible ship II 3, and the draft of the cabin bodies is controlled by a pneumatic pump.
As shown in fig. 9(a) to 9(d), the cabin is divided into a bottom cabin, and a middle cabin, a left side cabin and a right side cabin which are located above the bottom cabin, wherein the left side cabin and the right side cabin are further divided into a high-level cabin and a low-level cabin.
The utility model discloses a use as follows: when the offshore structure 5 is disassembled, the semi-submersible vessels I1 and II 3 approach the offshore structure 5 from two sides of the offshore structure 5, and the positions of the two semi-submersible vessels relative to the offshore structure 5 are positioned through DP systems of the semi-submersible vessels. The lifting arms I2 and II 4 reach the lifting points of the offshore structure 5 through back-and-forth and left-and-right movement, and the offshore structure 5 is not static only through positioning of the semi-submersible vessel by the DP system, so that the three-direction compensation function of the lifting arms needs to be started. The semi-submersible ship I1 and the semi-submersible ship II 3 are loaded in a row, 5% of load of offshore structures is transferred to the lifting arms and the semi-submersible ship, the locking mechanisms of the lifting arms I2 and the lifting arms II 4 act before lifting, and the lifting arms I2 and the lifting arms II 4 are locked in the front-back direction and the left-right direction. The lifting mechanisms 8 simultaneously operate to quickly lift the offshore structure 5. The semi-submersible ship I1 and the semi-submersible ship II 3 bear the offshore structure 5 and move synchronously, the semi-submersible ship III 9 is moved to a position between the semi-submersible ship I1 and the semi-submersible ship II 3 to be ready to load the disassembled offshore structure 5, the lifting arms on the semi-submersible ship I1 and the semi-submersible ship II 3 simultaneously move to unload the offshore structure 5 onto the semi-submersible ship III 9, and the semi-submersible ship III 9 loads the offshore structure 5, transports the offshore structure back to a wharf and slides to the shore.
Example 2:
the utility model aims at providing a large-scale offshore structure thing 5 integration dismouting method can realize dismantling or the installation operation to offshore structure thing 5 such as jacket platform, grouser formula platform, leg post formula platform, is particularly useful for the dismantling or the installation operation of the super large-scale platform chunk that weight surpassed ton.
Offshore oil field facility integration dismouting system's dismouting method, including following step:
the method comprises the following steps: before combined lifting, ballasting the semi-submersible ship I1 and the semi-submersible ship II 3 to reach the specified draft, as shown in FIG. 9 (a);
step two: the combined lifting starts, and the whole ship bears 90% of the weight of the lifted offshore structure 5 under the condition of unchanged draft through pneumatic rapid load discharge, as shown in fig. 9 (b);
step three: lifting is carried out in a combined manner, the lifting arms on the semi-submersible ship I1 and the semi-submersible ship II 3 lift the heavy objects to a specified height instantly, and meanwhile, the ballast water is transferred from the high-level tank to the low-level tank by pneumatic gravity falling water, so that the leveling of the offshore structure 5 and the ship body is completed, as shown in fig. 9 (c);
step four: in the process of unloading the offshore structure 5, the hull is always kept in a leveled state by rapidly transferring ballast water from the high-level tank to the low-level tank, as shown in fig. 9 (d).
(1) The utility model is not limited by the 5-size of the offshore structure in theory by the combined action of two ships.
(2) The utility model discloses two lifting arm quantity on the ship can be according to marine structure thing 5's weight, and the adjustment lifts arm extension length and the position of locating, can be according to marine structure thing 5's structure, space adjustment.
(3) The utility model discloses a DP system location and the compensation function who rises the arm that semi-submerged ship is from area realize before lifting jointly that 5 are static for marine structure.
(4) The utility model discloses lift the arm and pass through bolt fixed mounting with the hull, when not needing the dismouting, can dismantle and lift the arm, semi-submerged ship can regard as the transport ship to use.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An integrated dismounting system for large offshore structures comprises a semi-submersible ship I (1), a semi-submersible ship II (3), a lifting arm I (2), a lifting arm II (4) and an offshore structure (5), and is characterized in that a support I (6) and a support II (7) of the lifting arm I (2) are mounted on the semi-submersible ship I (1) through bolts, and the support I (6) and the support II (7) of the lifting arm II (4) are mounted on the semi-submersible ship II (3) through bolts; a plurality of lifting arms I (2) are arranged on the semi-submersible vessel I (1) in parallel, and a plurality of lifting arms II (4) are arranged on the semi-submersible vessel II (3) in parallel; the lifting arm I (2) and the lifting arm II (4) are provided with lifting systems with three-way movement compensation functions, and the lifting systems are provided with locking mechanisms; before lifting, the locking mechanism of the lifting arm I (2) and the lifting arm II (4) acts, and the lifting arm I (2) and the lifting arm II (4) are locked in the front-back direction and the left-right direction; the lifting mechanisms (8) simultaneously operate to lift the offshore structure (5).
2. The integrated disassembly and assembly system for the large offshore structure according to claim 1, wherein the lifting system with the three-way movement compensation function further comprises a moving trolley I (10) and a moving trolley II (11), the bottoms of the front ends of the lifting arms I (2)/II (4) are installed at the upper end of the moving trolley I (10), the rear ends of the lifting arms I (2)/II (4) are installed at the upper end of the moving trolley II (11), the lower end of the moving trolley I (10) is installed on a support I (6), the lower end of the moving trolley II (11) is installed on a support II (7), and the support I (6) and the support II (7) are respectively fixed on the semi-submersible ship I (1) and the semi-submersible ship II (3); a lifting mechanism (8) driving the lifting object to move up and down is hinged at the front end of the lifting arm I (2)/the lifting arm II (4).
3. The integrated dismounting system for the large offshore structure according to claim 2, wherein the travelling wheel sets and travelling wheels are mounted on the travelling trolley I (10) and the travelling trolley II (11), wherein the travelling wheel sets are mounted in a track of the lifting arm I (2)/the lifting arm II (4) which plays a role of restraining the main arm up and down, and the travelling wheels are mounted on a track of the support I (6) or the support II (7); the lifting arm I (2)/the lifting arm II (4) moves left and right through the traveling wheel set; the lifting arm I (2)/the lifting arm II (4) moves back and forth through the travelling wheels;
the upper end of the movable trolley I (10) is provided with a locking mechanism which is meshed with the fixed rack (13) of the lifting arm I (2)/the lifting arm II (4), and the lower end of the movable trolley I (10) is provided with a locking mechanism which is meshed with the fixed rack (13) of the lifting support I (6).
4. The integrated disassembling and assembling system for the large offshore structure according to claim 3 or above, wherein the locking mechanism comprises a locking rack (12) with an inverted trapezoid cross section, the locking rack (12) is positioned on one side of the fixed rack (13), two adjusting hydraulic cylinders (14) are hinged to the bottom of the locking rack (12), and the adjusting hydraulic cylinders are arranged in a splayed shape with a certain included angle therebetween; two locking sliding blocks (15) are movably arranged on the left and right of the locking rack (12), the locking sliding blocks (15) slide along the slideway in a single direction, and inclined planes matched with the locking rack (12) are arranged; the locking rack (12) is pushed into the fixed rack (13) by the adjusting hydraulic cylinder (14), the locking rack (12) and the fixed rack (13) are meshed with each other, the two locking sliders (15) approach to the locking rack (12), and the inclined planes of the two locking sliders (15) are attached to the inclined plane of the locking rack (12).
5. A large offshore structure integrated dismounting system according to claim 1, wherein DP systems are installed on the semi-submersible vessel I (1) and the semi-submersible vessel II (3), and the semi-submersible vessel I (1) and the semi-submersible vessel II (3) are respectively positioned at two sides of the offshore structure (5).
6. Integrated disassembly and assembly system for large offshore structures according to claim 5, wherein the DP system positioning and compensation functions of the lifting arms together enable the lifting mechanism (8) to be stationary relative to the offshore structure (5) before lifting.
7. Integrated disassembly and assembly system for large offshore structures according to claim 1, further comprising a semi-submersible vessel III (9), wherein the lifting arms on the semi-submersible vessel I (1) and the semi-submersible vessel II (3) are simultaneously actuated to unload the offshore structure (5) onto the semi-submersible vessel III (9).
8. The integrated dismounting system for the large offshore structure according to claim 1, wherein the semi-submersible vessel I (1) and the semi-submersible vessel II (3) are provided with a plurality of controllable cabins, and the draft of the cabins is controlled by a pneumatic pump.
9. The integrated disassembling and assembling system for large offshore structures according to claim 8, wherein the hull is divided into a bottom hull, and a middle hull, a left side hull and a right side hull located above the bottom hull, wherein the left side hull and the right side hull are further divided into a high-level hull and a low-level hull.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922435538.6U CN211364878U (en) | 2019-12-30 | 2019-12-30 | Integrated dismounting system for large offshore structure |
| EP20910667.3A EP4053012B1 (en) | 2019-12-30 | 2020-12-14 | Integrated disassembly system and disassembly method for large offshore structure |
| PCT/CN2020/136068 WO2021135903A1 (en) | 2019-12-30 | 2020-12-14 | Integrated disassembly system and disassembly method for large offshore structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922435538.6U CN211364878U (en) | 2019-12-30 | 2019-12-30 | Integrated dismounting system for large offshore structure |
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| CN211364878U true CN211364878U (en) | 2020-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021135903A1 (en) * | 2019-12-30 | 2021-07-08 | 山东海洋能源有限公司 | Integrated disassembly system and disassembly method for large offshore structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021135903A1 (en) * | 2019-12-30 | 2021-07-08 | 山东海洋能源有限公司 | Integrated disassembly system and disassembly method for large offshore structure |
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