CN111268059A - Offshore platform dismantling method - Google Patents
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- CN111268059A CN111268059A CN202010128670.7A CN202010128670A CN111268059A CN 111268059 A CN111268059 A CN 111268059A CN 202010128670 A CN202010128670 A CN 202010128670A CN 111268059 A CN111268059 A CN 111268059A
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Abstract
The invention discloses a method for dismantling an offshore platform, which comprises the following steps: providing a first lifting ship, a second lifting ship and a transport ship, wherein the first lifting ship and the second lifting ship change the draft and are close to the offshore platform, and the docking unit is docked with the offshore platform; the first lifting ship and the second lifting ship reduce draft to lift the offshore platform and separate the offshore platform from the jacket; and relatively moving the offshore platform and the transport ship, placing the offshore platform on the transport ship, and transporting the offshore platform by the transport ship. According to the offshore platform dismantling method provided by the invention, the offshore platform is subjected to floating support dismantling based on cooperation of three ships, the two lifting ships are in butt joint with the offshore platform, then the offshore platform is lifted and separated from the jacket, and then the offshore platform is placed on the transport ship to be transported back to a wharf, so that the operation time is greatly shortened, the cost for dismantling the offshore platform is effectively reduced, and a brand new scheme is provided.
Description
Technical Field
The invention belongs to the field of ship and ocean engineering, and particularly relates to a method for dismantling an offshore platform.
Background
Global marine oil and gas production facilities are increasing and many aging platform structures will face decommissioning problems in the future. The offshore platform is positioned on the jacket, and for the superstructure of the offshore platform with the weight less than 5000 tons, the scheme which is safe and has economic benefit is realized by adopting the single-ship hoisting technology of the traditional crane ship. However, for a heavier large offshore platform, the platform superstructure needs to be divided into a plurality of chunks for block hoisting, and the scheme has long dismantling operation time and huge investment. Therefore, it is a problem to be solved by those skilled in the art to solve the dismantling problem of large offshore platforms more economically, safely and environmentally.
Disclosure of Invention
The invention provides a method for dismantling an offshore platform, aiming at solving the problem of dismantling the offshore platform.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
an offshore platform demolition method, comprising:
providing a first lifting ship, a second lifting ship and a transport ship, wherein the first lifting ship and the second lifting ship are respectively provided with a docking unit and a balance water tank, and the docking unit is used for connecting the offshore platform with the first lifting ship and the second lifting ship; the balance water tank is used for keeping the first lifting ship and the second lifting ship in a stable state.
The first lifting ship and the second lifting ship change the draught and are close to the offshore platform, so that the docking unit is docked with the offshore platform;
the first lifting ship and the second lifting ship reduce draft to lift the offshore platform and separate the offshore platform from the jacket;
and relatively moving the offshore platform and the transport ship, placing the offshore platform on the transport ship, and transporting the offshore platform by the transport ship.
According to one embodiment of the invention, the first and second lift vessels are moved in unison or in parallel by controlling the distance between the locations of the first lift vessel and the locations of the second lift vessel.
According to one embodiment of the invention, the first and/or second lifting vessel is provided with a distance measuring device for detecting the distance between a plurality of locations of the first lifting vessel and a plurality of locations of the second lifting vessel.
According to one embodiment of the invention, the distance measuring device is a laser distance measuring device and/or a microwave distance measuring device.
According to one embodiment of the invention, the first and/or second lifting vessel is provided with a communication device which transmits distance information between a plurality of locations of the first lifting vessel and a plurality of locations of the second lifting vessel.
According to one embodiment of the invention, the first lifting ship and/or the second lifting ship are respectively provided with a main machine, the main machine is used for controlling the operation of an actuating system, and the main machine on the first lifting ship is used for controlling the operation of the actuating system of the first lifting ship according to the distances between a plurality of parts of the first lifting ship and the second lifting ship; and/or the main machine on the second lifting ship controls the operation of the actuating system of the second lifting ship according to the distances between a plurality of parts of the first lifting ship and the second lifting ship.
According to one embodiment of the invention, the carrier vessel is moved in coordination with or parallel to the first and second lift vessels to the very middle between the first and second lift vessels by controlling the distance between the locations of the carrier vessel and the locations of the first and/or second lift vessels.
According to one embodiment of the invention, the carrier vessel, the first lifting vessel and/or the second lifting vessel is provided with a distance measuring device for detecting the distance between locations of the carrier vessel and locations of the first lifting vessel and/or locations of the second lifting vessel.
According to one embodiment of the invention, the transport vessel, the first lifting vessel and/or the second lifting vessel are provided with communication means, respectively, which transmit distance information between three or two of the transport vessel, the first lifting vessel and/or the second lifting vessel.
According to one embodiment of the invention, the transport ship, the first lifting ship and/or the second lifting ship are respectively provided with a host machine, the host machine is used for controlling the operation of an actuating system, and the host machine on the first lifting ship is used for controlling the operation of the actuating system of the first lifting ship according to the distance among the three or two of the first lifting ship, the second lifting ship and the transport ship; and/or a main machine on the second lifting ship controls the operation of an actuating system of the second lifting ship according to the distance among the first lifting ship, the second lifting ship and the transport ship or between the first lifting ship and the second lifting ship; and the host machine on the transport ship controls the operation of an actuating system of the transport ship according to the distance between the first lifting ship, the second lifting ship and the transport ship or between the first lifting ship, the second lifting ship and the transport ship.
According to one embodiment of the invention the positioning level of the dynamic positioning functions of the first lift vessel, the second lift vessel and the carrier vessel is above DP 2.
According to one embodiment of the invention, in the process of supporting the offshore platform by the first lifting ship and the second lifting ship for lifting, whether the lifting of the first lifting ship and the second lifting ship is synchronous is judged through the loads of the first lifting ship and the second lifting ship, the floating state of the first lifting ship and the second lifting ship and/or the draught of the first lifting ship and the second lifting ship; if the load difference between the first lifting ship and the second lifting ship exceeds an allowable range, the floating state difference between the first lifting ship and the second lifting ship exceeds an allowable range and/or the draft difference between the first lifting ship and the second lifting ship exceeds an allowable range, judging that the lifting of the first lifting ship and the second lifting ship is asynchronous; and if the lifting of the first lifting ship and the second lifting ship is not synchronous, adjusting the lifting speed of the first lifting ship and/or the second lifting ship.
According to one embodiment of the invention, a force sensor is provided on the first and second lifting vessels for the load when the first and second lifting vessels lift the offshore platform.
The invention provides a method for dismantling an offshore platform, which is characterized in that the offshore platform is dismantled in a floating mode based on cooperation of three ships, two lifting ships are in butt joint with the offshore platform, then the offshore platform is lifted and separated from a jacket, and then the offshore platform is placed on a transport ship to be transported back to a wharf, so that the operation time is greatly shortened, the cost for dismantling the offshore platform is effectively reduced, and a brand-new scheme is provided for the dismantling problem of the waste offshore platform. According to the invention, the first balance water tank and the second balance water tank are respectively arranged on the decks of the first lifting ship and the second lifting ship, so that the floating support dismantling capability of the first lifting ship and the second lifting ship can be increased.
Drawings
FIG. 1 is a schematic top view of a first and second lift vessel of the present invention docked with an offshore platform;
FIG. 2 is a schematic side view of the docking of the first and second lift vessels with the offshore platform of the present invention;
fig. 3 is a side view of the first and second vessels of the present invention docking the offshore platform to the carrier.
Fig. 4 is a block diagram of a control system according to the present invention.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
as shown in fig. 1-4, an offshore platform 50 is disposed on a jacket 52. A jacket 52 is provided at sea for supporting the offshore platform 50, the jacket 52 being comprised of hollow legs and crossbars connecting the legs. The offshore platform 50 is provided with a docking structure 51.
The invention discloses a device used in a method for dismantling an offshore platform, which comprises two lifting ships and a transport ship 30. The vessels, i.e., the first vessel 10 and the second vessel 20. The first lifting vessel 10 is provided with a first main unit 11, a first communication device 12, and a first distance measuring device 13. The first lift vessel 10 is moved by an actuation system. The first main machine 11 is used to control the operation of the actuator system of the first lifting vessel 10. The first distance measuring devices 13 are provided in plurality, and the first distance measuring devices 13 are provided at the bow, the stern, and the middle of the first ship lift 10 in the longitudinal direction. A plurality of first distance measuring devices 13 are also provided in the height direction of the first lifting vessel 10. The first ranging device 13 is used to detect the distance between the same position where it is located and the corresponding position of the second lifting vessel 20 and transmit a distance signal to the first host computer 11. For example, the first distance measuring device 13 located at the bow is used to detect the distance between the bow of the first lifting vessel 10 and the bow of the second lifting vessel 20. The first distance measuring device 13 located at the stern is used to detect the distance between the stern of the first ship lift 10 and the stern of the second ship lift 20. Whether the first lifting vessel 10 and the second lifting vessel 20 are in coordination can be judged according to whether the distances between the multiple positions of the first lifting vessel 10 and the second lifting vessel 20 meet the standard value or whether the differences between the multiple positions and the standard value exceed the allowable range. If the distances between the multiple positions of the first lifting vessel 10 and the second lifting vessel 20 meet a standard value or do not exceed an allowable difference range, for example, 10%, it is determined that the first lifting vessel 10 and the second lifting vessel 20 are coordinated; if the difference is beyond the allowable range, such as 10%, the two are judged to be inconsistent. For example, when the first and second lifting vessels 10 and 20 are close to the offshore platform 50 in parallel, the first distance measuring device 13 detects that the distances between the positions of the first and second lifting vessels 10 and 20 should be consistent with the change of the values when the two are parallel, i.e., decrease equidistantly. If the non-equidistant variation or the distance variation is out of the allowable range, it is judged that the first lifting vessel 10 is not parallel or not in harmony with the second lifting vessel 20. The allowable range of the variation distance may be determined according to practical situations, such as 10%, 20%, etc. The first host 11 controls the operation of the first communication device 12.
The movement of the first and second lifting vessels 10 and 20 includes various cases including both moving to the offshore platform 50 separately, both moving linearly with the offshore platform 50, both moving curvilinearly with the offshore platform 50, etc., so that it is necessary to keep the two in harmony during the movement, that is, each moving according to a predetermined route and speed. The same moving speed or parallelism, i.e., coordination, is maintained during the approach of the first and second vessels 10 and 20 to the offshore platform. Maintaining the respective predetermined routes and speeds while the first and second vessels 10 and 20 are moving together with the offshore platform is coordinated, and preferably both are moving in parallel.
The first lifting vessels 10 are each provided with a first docking unit 14 and a first balance tank 15. The first docking unit 14 is adapted to cooperate with a docking structure 51 of the offshore platform 50 to couple the first lift vessel 10 to the offshore platform 50. The first balance tank 15 is used to keep the first lift vessel 10 balanced during operation.
The second lifting vessel 20 is provided with a second main machine 21, a second communication device 22, and a second distance measuring device 23. The second vessel 20 is moved by an actuating system. The second main machine 21 is used for controlling the operation of the actuating system of the second ship lift 20. The carrier 30 is provided with a third main unit 31, a third communication device 32, and a third distance measuring device 33. The carrier 30 is moved by an actuating system. The third main machine 31 is used for controlling the operation of the actuation system of the carrier 30. The second host 21 and the third host 31 have the same function as the first host 11. The second communication device 22 and the third communication device 22 have the same function as the first communication device 12, and can communicate with each other. The second distance measuring device 23 and the third distance measuring device 33 have the same function as the first distance measuring device 13, and respectively transmit the detected distance signals to the first host 11, the second host 21 and the third host 31. The plurality of third distance measuring devices 33 may detect the distance between the carrier 30 and the first lifting vessel 10, the distance between the carrier 30 and the second lifting vessel 20, and the distance between the carrier 30 and the first lifting vessel 10 and the second lifting vessel 20. In this embodiment, the plurality of third ranging devices 33 simultaneously detect the distances between the carrier vessel 30 and the first and second lifting vessels 10 and 20. The first distance measuring device 13, the second distance measuring device 23 and the third distance measuring device 33 may be laser distance measuring devices or microwave distance measuring devices. In the present embodiment, the first distance measuring device 13, the second distance measuring device 23 and the third distance measuring device 33 are all microwave distance measuring devices.
The second lifting vessel 20 is provided with a second docking unit 24 and a second trim tank 25. The second docking unit 24 is adapted to cooperate with a docking structure 51 of the offshore platform 50 to couple the second lifting vessel 20 to the offshore platform 50. The second balance tank 25 is used to keep the second lifting vessel 20 balanced during operation. The specific structure of the first docking unit 14, the second docking unit 24 and the docking structure 51 can be implemented by the solution in the prior art, as long as the detachable connection function can be achieved.
When the offshore platform 50 is to be dismantled, first, as shown in fig. 2, the first and second lifting vessels 10 and 20 are moved toward each other from the left and right sides to be respectively close to the offshore platform 50. During the movement of the first and second vessels 10 and 20, the first and second distance measuring devices 13 and 23 measure distances between the first and second vessels 10 and 20 and transmit the distances to the first and second main units 11 and 21, respectively. The first host machine 11 and the second host machine 21 judge whether the first lifting vessel 10 and the second lifting vessel 20 move coordinately or not according to the distance between a plurality of positions of the first lifting vessel 10 and the second lifting vessel 20, and if the first lifting vessel 10 and the second lifting vessel 20 move coordinately, the first lifting vessel and the second lifting vessel continue to move; if the two main machines are not coordinated, the actuating system of the ship lifting machine controlled by one or both of the first main machine 11 and the second main machine 21 respectively works and is adjusted to be in a state of being coordinated with the two main machines. For example, when it is necessary to keep the first lift vessel 10 and the second lift vessel 20 in a parallel state, if a change in the distance between the bow of the first lift vessel 10 and the bow of the second lift vessel 20 is detected, and the change in the stern distance is different from or exceeds an allowable range, it indicates that one of them is deflected. Taking the example of the second vessel 20 deflecting, the second main machine 21 controls its actuator system to adjust the state of the second vessel 20 so that it is parallel to the first vessel 10.
The draft of the first lifting vessel 10 and the draft of the second lifting vessel 20 are changed, so that the first docking unit 14 and the second docking unit 24 are respectively docked with the docking structure 51 of the offshore platform 50, and the three are connected. The first and second vessels 10, 20 have reduced drafts to lift the offshore platform 50 off of the jacket 52. During the lifting process, whether the first lifting vessel 10 and the second lifting vessel 20 are lifted synchronously can be judged by detecting the load data, the ship floating state or the draught degree of the first lifting vessel 10 and the second lifting vessel 20. If the two lifting speeds are not synchronous, the lifting speeds of the first lifting vessel 10 and the second lifting vessel 20 are adjusted, for example, the lifting speed is increased when the lifting speed is slow, or the lifting speed is reduced when the lifting speed is fast, so that the lifting of the two lifting vessels is synchronous.
If the load of one of the first lifting vessel 10 and the second lifting vessel 20 is significantly larger than that of the other, and the draft difference between the first lifting vessel 10 and the second lifting vessel 20 exceeds the allowable range, the two lifting vessels are out of synchronization. The allowable range of the difference between the two loads can be determined according to actual conditions, for example, the difference between the two loads is 10%, 15% and the like is allowable, and adjustment is required if the difference exceeds the range. Sensing the load may be accomplished by a force sensor. A first force sensor 16 is arranged on the first docking unit 14; the second docking unit 15 is provided with a second force sensor 26, and the first force sensor 16 and the second force sensor 26 are respectively used for detecting the load of the ship to be lifted and transmitting the values to respective main machines. The allowable load difference range can be determined according to actual conditions, such as 10%, 15%, and the like.
If the difference between the buoyancy of the first lift vessel 10 and the buoyancy of the second lift vessel 20 exceeds the allowable range, it is also determined that the first lift vessel 10 and the second lift vessel 20 are out of synchronization in lifting. The float state includes a roll angle, a forward rake angle and/or a backward rake angle. When the first lifting vessel 10 and the second lifting vessel 20 are lifted synchronously, the difference of the floating state data of the two is within an allowable range, such as 15%. If the allowable range is exceeded, the two are judged to be out of harmony. The allowable float state difference range can be determined according to actual conditions, such as 10%, 15% and the like.
If the draft difference between the first lifting vessel 10 and the second lifting vessel 20 exceeds the allowable range, for example, 15%, it can be determined that the first lifting vessel 10 and the second lifting vessel 20 are out of synchronization. The allowable draft gap range can be determined according to actual conditions, such as 10%, 15% and the like.
The first and second lifting vessels 10 and 20 jointly hold the offshore platform 50, move the offshore platform 50 and the carrier vessel 30 relative to each other to place the offshore platform 50 above the carrier vessel 30, and then transport the offshore platform 50 to a desired location by the carrier vessel 30. When the offshore platform 50 and the carrier 30 move relative to each other, the offshore platform 50 may move, the carrier 30 may move, or both of them may move. In the moving process, the first distance measuring device 13, the second distance measuring device 23 and the third distance measuring device 33 are used for detecting the distance between the three or two to determine whether the states of the three or two meet the requirement. For example, when the transport ship 30 needs to be moved to the middle between the first and second lifting ships 10 and 20, it is determined whether the transport ship 30 is located at the middle between the first and second lifting ships 10 and 20 by detecting whether the distances between the transport ship 30 and the first and second lifting ships 10 and 20 are equal to each other.
The technical scheme adopted by the embodiment is an offshore platform dismantling method based on three-ship cooperative dynamic positioning, and the first lifting ship 10, the second lifting ship 20 and the transport ship 30 are semi-submersible ships with dynamic positioning functions. The dynamic positioning is a positioning method capable of automatically keeping the offshore floating device without anchoring, and the offshore floating device adopting the dynamic positioning does not need to be anchored during offshore operation, so that not only is the complicated anchoring process reduced, but also the working water depth is not limited by the length of the anchoring system, and the method is not only applied to the ship stopping positioning, but also can be applied to the distance fixing between ships. The positioning grade of the dynamic positioning function of the ship for lifting is above DP2, the positioning grade of the dynamic positioning function of the transport ship is above DP2, and the DP2 grade indicates that the position and heading of the ship can be automatically maintained within a specified operation range under specified environmental conditions after a single fault (not including the loss of one cabin or a plurality of cabins) occurs on the ship provided with the dynamic positioning system.
With continued reference to fig. 1 and 2, the first and second lift vessels 10, 20 change draft by adjusting ballast water, which generally refers to the draft of the vessel and the vertical distance from the bottom of the vessel to the junction of the hull and the water surface, and indirectly reflects the buoyancy force to which the vessel is subjected during travel. The ballast water system has the function of injecting ballast water into the ballast water tank or discharging the ballast water from the ballast water tank so as to achieve the following purposes: the ballast water system is used for injecting ballast water into each ballast tank through a ballast water pump, a valve box and a ballast pipeline to discharge the ballast water from each ballast tank and perform adjustment among the ballast tanks. The draught is changed to adjust a freeboard and a transverse inclination angle, wherein the freeboard is a vertical distance from a full-load waterline to the upper edge of a deck in the middle of the ship, and the transverse inclination angle is an angle of transverse inclination (namely transverse inclination) generated by the ship under the action of external force, so that the stability of the ship is maintained.
In this embodiment, the first balance water tank 15 is located on the other side of the first lift vessel 10 relative to the offshore platform 50, and the first lift vessel 10 can be kept in a balanced state all the time by adjusting the ballast water of the first balance water tank 15 on the other side relative to the offshore platform 50 in addition to using the ballast water system during the floating process of the first lift vessel 10, and since the offshore platform 50 mainly makes the first lift vessel 10 bear its gravity on one side, the first balance water tank 15 on the other side can be well adjusted to reach a stable state and increase the floating dismantling operation capability. The second balancing tank 25 acts on the first balancing tank 15 in the same way to maintain the balance of the second vessel 20.
In this embodiment, with continued reference to fig. 3, the deck of the carrier vessel 30 is provided with a support unit 36, the support unit 36 is used for supporting the offshore platform 50, and after the offshore platform 50 is moved to the docking position above the carrier vessel 30, the first lift vessel 10, the second lift vessel 20 and the carrier vessel 30 can simultaneously adjust the ballast water to transfer the load of the offshore platform 50 to the support unit 36 of the carrier vessel 30, and finally be transported back to the dock by the carrier vessel 30.
In the present invention, the first distance measuring device 13, the second distance measuring device 23 and the third distance measuring device 33 are embodiments of distance measuring devices, and they are not necessarily all required to be arranged, and can be selected according to actual needs. The first communication device 12, the second communication device 22, and the third communication device 32 are all embodiments of communication devices that may employ devices that are suitable for or communicate. The first host 11, the second host 21 and the third host 31 are all embodiments of hosts, and may be of any suitable type, such as a PLC, an industrial personal computer, etc.
The invention provides a method for dismantling an offshore platform, which is characterized in that the offshore platform is dismantled in a floating mode based on cooperation of three ships, two lifting ships are in butt joint with the offshore platform, then the offshore platform is lifted and separated from a jacket, and then the offshore platform is placed on a transport ship to be transported back to a wharf, so that the operation time is greatly shortened, the cost for dismantling the offshore platform is effectively reduced, and a brand-new scheme is provided for the dismantling problem of the waste offshore platform. According to the invention, the first balance water tank and the second balance water tank are respectively arranged on the decks of the first lifting ship and the second lifting ship, so that the floating support dismantling capability of the first lifting ship and the second lifting ship can be increased.
The embodiments of the present invention are merely illustrative, and not restrictive, of the scope of the claims, and other substantially equivalent alternatives may occur to those skilled in the art and are within the scope of the present invention.
Claims (13)
1. An offshore platform demolition method, comprising:
providing a first lifting ship, a second lifting ship and a transport ship, wherein the first lifting ship and the second lifting ship are respectively provided with a docking unit and a balance water tank, and the docking unit is used for connecting the offshore platform with the first lifting ship and the second lifting ship; the balance water tank is used for keeping the first lifting ship and the second lifting ship in a stable state;
the first lifting ship and the second lifting ship change the draught and are close to the offshore platform, so that the docking unit is docked with the offshore platform;
the first lifting ship and the second lifting ship reduce draft to lift the offshore platform and separate the offshore platform from the jacket;
and relatively moving the offshore platform and the transport ship, placing the offshore platform on the transport ship, and transporting the offshore platform by the transport ship.
2. The offshore platform demolition method of claim 1 wherein the first lift vessel is moved in coordination with or parallel to the second lift vessel by controlling the distance between the locations of the first lift vessel and the locations of the second lift vessel.
3. The offshore platform demolition method according to claim 2, characterized in that the first and/or second hoisting vessel is provided with distance measuring means for detecting distances between locations of the first hoisting vessel and locations of the second hoisting vessel.
4. The offshore platform demolition method according to claim 3, wherein the distance measuring device is a laser distance measuring device and/or a microwave distance measuring device.
5. The offshore platform demolition method according to claim 2, characterized in that the first and/or the second lifting vessel is provided with a communication device which transmits distance information between a plurality of locations of the first lifting vessel and a plurality of locations of the second lifting vessel.
6. The offshore platform dismantling method according to claim 2, wherein a main machine is provided on each of the first and/or second lifting vessels, the main machine being adapted to control operation of an actuator system, the main machine on the first lifting vessel controlling operation of the actuator system of the first lifting vessel based on distances between a plurality of locations of the first lifting vessel and the second lifting vessel; and/or the main machine on the second lifting ship controls the operation of the actuating system of the second lifting ship according to the distances between a plurality of parts of the first lifting ship and the second lifting ship.
7. The offshore platform demolition method according to claim 1, wherein the carrier vessel is moved in coordination with or in parallel with the first and second lift vessels to a midpoint between the first and second lift vessels by controlling a distance between locations of the carrier vessel and locations of the first lift vessel and/or locations of the second lift vessel.
8. The offshore platform demolition method according to claim 7, wherein the carrier vessel, the first lifting vessel and/or the second lifting vessel are provided with distance measuring means for detecting distances between locations of the carrier vessel and locations of the first lifting vessel and/or locations of the second lifting vessel.
9. The offshore platform demolition method according to claim 7, wherein the carrier, the first lifting vessel and/or the second lifting vessel are provided with communication means, respectively, which transmit distance information between three or two of the carrier, the first lifting vessel and/or the second lifting vessel.
10. The offshore platform demolition method according to claim 7, wherein the carrier, the first and/or the second lifting vessel are respectively provided with a main machine for controlling an operation of an actuating system, the main machine on the first lifting vessel controlling the operation of the actuating system of the first lifting vessel according to a distance between three or two of the first lifting vessel, the second lifting vessel and the carrier; and/or a main machine on the second lifting ship controls the operation of an actuating system of the second lifting ship according to the distance among the first lifting ship, the second lifting ship and the transport ship or between the first lifting ship and the second lifting ship; and the host machine on the transport ship controls the operation of an actuating system of the transport ship according to the distance between the first lifting ship, the second lifting ship and the transport ship or between the first lifting ship, the second lifting ship and the transport ship.
11. The offshore platform demolition method according to claim 1, wherein the positioning level of the dynamic positioning function of the first lift vessel, the second lift vessel and the carrier vessel is above DP 2.
12. The offshore platform dismantling method of claim 1, wherein during the first and second lifting vessels supporting the offshore platform for lifting, whether the lifting of the first and second lifting vessels is synchronized is judged by the loads of the first and second lifting vessels, the floating states of the first and second lifting vessels, and/or the draft of the first and second lifting vessels; if the load difference between the first lifting ship and the second lifting ship exceeds an allowable range, the floating state difference between the first lifting ship and the second lifting ship exceeds an allowable range and/or the draft difference between the first lifting ship and the second lifting ship exceeds an allowable range, judging that the lifting of the first lifting ship and the second lifting ship is asynchronous; and if the lifting of the first lifting ship and the second lifting ship is not synchronous, adjusting the lifting speed of the first lifting ship and/or the second lifting ship.
13. The offshore platform demolition method according to claim 1 or 12, wherein the first and second hoisting vessels are provided with force sensors, respectively, for loads when the first and second hoisting vessels lift the offshore platform.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113428804A (en) * | 2021-05-31 | 2021-09-24 | 上海交通大学 | Jacking device and jacking method for offshore double-ship dismantling platform |
| CN113888853A (en) * | 2021-10-25 | 2022-01-04 | 哈尔滨工程大学 | Real-time monitoring system for multi-ship motion postures |
| CN114313147A (en) * | 2020-10-10 | 2022-04-12 | 中国石油天然气股份有限公司 | Installation method of offshore platform upper module |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10022322A1 (en) * | 2000-05-09 | 2001-11-15 | Mannesmann Rexroth Ag | Offshore platform removal system includes elements capable of taking measured stress loads in sub-structure |
| CN104390588A (en) * | 2014-11-19 | 2015-03-04 | 上海交通大学 | Real-time monitoring system applied to floating mounting |
| US20150114189A1 (en) * | 2012-09-17 | 2015-04-30 | Jon Khachaturian | Method and apparatus for removing underwater platforms |
| CN105035260A (en) * | 2015-05-19 | 2015-11-11 | 中国海洋石油总公司 | Method for integrally detaching topside module of offshore abandoned platform |
| CN208188329U (en) * | 2018-05-28 | 2018-12-04 | 上海交通大学 | A kind of dust cover for marine floating support mounting laser sensing equipment |
| CN208860955U (en) * | 2018-08-29 | 2019-05-14 | 上海交通大学 | A kind of highly redundant measuring system for floating support mounting towboat motion positions |
-
2020
- 2020-02-28 CN CN202010128670.7A patent/CN111268059A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10022322A1 (en) * | 2000-05-09 | 2001-11-15 | Mannesmann Rexroth Ag | Offshore platform removal system includes elements capable of taking measured stress loads in sub-structure |
| US20150114189A1 (en) * | 2012-09-17 | 2015-04-30 | Jon Khachaturian | Method and apparatus for removing underwater platforms |
| CN104390588A (en) * | 2014-11-19 | 2015-03-04 | 上海交通大学 | Real-time monitoring system applied to floating mounting |
| CN105035260A (en) * | 2015-05-19 | 2015-11-11 | 中国海洋石油总公司 | Method for integrally detaching topside module of offshore abandoned platform |
| CN208188329U (en) * | 2018-05-28 | 2018-12-04 | 上海交通大学 | A kind of dust cover for marine floating support mounting laser sensing equipment |
| CN208860955U (en) * | 2018-08-29 | 2019-05-14 | 上海交通大学 | A kind of highly redundant measuring system for floating support mounting towboat motion positions |
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| CN114313147A (en) * | 2020-10-10 | 2022-04-12 | 中国石油天然气股份有限公司 | Installation method of offshore platform upper module |
| CN113428804A (en) * | 2021-05-31 | 2021-09-24 | 上海交通大学 | Jacking device and jacking method for offshore double-ship dismantling platform |
| CN113888853A (en) * | 2021-10-25 | 2022-01-04 | 哈尔滨工程大学 | Real-time monitoring system for multi-ship motion postures |
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