Blocking power positioning floating bracket installation technology of large marine structure
A marine structure and dynamic positioning technology, which is applied in transportation and packaging, ship parts, ships, etc., can solve the problems of complex construction preparation and high weather window requirements, and achieve the effect of simple construction preparation
Inactive Publication Date: 2017-05-31
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
However, due to the existing mooring floats to install large marine structures, mooring equipment needs to be pre-arranged at sea and secondary connections are required
Therefore, preparations for offshore construction are more complicated, and the requirements for weather windows are high; at the same time, when deploying anchors, it is limited by water depth
Method used
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Embodiment Construction
[0018] Such as figure 1 — image 3 Shown, the present invention adopts following steps:
[0019] Step 1: Transport block 2 to the installation site of the offshore platform by ship 1, and then perform dynamic positioning in-place drill according to the preset plan;
[0020] Step 2: The ship 1 approaches the jacket 3 gradually by its own dynamic positioning system, positions the ship 1 through the position reference system, and guides the ship 1 to smoothly enter the notch of the jacket 3 by the ship-entry guide 7 set at the tail of the ship 1 ; The jacket 2 is provided with a swaying rubber fender 4, which buffers the collision force between the ship 1 and the jacket 3 through the swaying rubber fender 4;
[0021] The third step: advance the ship 1 to the final docking position in the notch of the jacket 3, adjust the size of the ballast on the ship 1, lower the block 2 onto the jacket 3, and the block legs are set on the jacket 2 The coupling device 5 buffers the collision...
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The invention discloses a blocking power positioning floating bracket installation technology of a large marine structure. The blocking power locating floating bracket installation technology comprises the steps of (1) transporting blocking to a marine platform installation site and then carrying out power positioning in-place exercise; (2) enabling a ship to gradually approach a jacket by virtue of a power positioning system, positioning a chip through a position reference system and guiding the chip to smoothly enter a notch of the jacket through a ship entering guide arranged on the chip; (3) enabling the ship to advance to a final docking position in the notch of the jacket, adjusting the ballast on the chip and transferring the blocking to the jacket; and (4) further adjusting the ballast of the ship to an exit draught position and then making the ship quit from the jacket to complete blocking power positioning floating bracket installation operation. The large marine structure can be installed under the conditions of any weather window and operating water depth, and furthermore, the installation efficiency on the large marine structure under a severe sea condition is greatly improved.
Description
technical field [0001] The invention relates to an installation process of a large-scale ocean structure, in particular to a block dynamic positioning float-over installation process for a large-scale ocean structure. It belongs to the field of offshore oil engineering. Background technique [0002] At present, for the overall installation of large-scale marine structures, the method of mooring float-over installation is usually used. However, due to the existing mooring floatover installation of large marine structures, mooring equipment needs to be pre-arranged at sea and secondary connections are required. Therefore, preparations for offshore construction are more complicated, and the requirements for the weather window are high; at the same time, when deploying anchors, it is limited by the water depth. Contents of the invention [0003] The main purpose of the present invention is to overcome the above-mentioned shortcomings existing in the prior art, and to provide...
Claims
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IPC IPC(8): B63B9/06
CPCB63B75/00
Inventor 徐京阔许南王飚王明伦于文太贺辰秦立成李立涛李新超
Owner CHINA NAT OFFSHORE OIL CORP