Launching process of jack-up offshore drilling platform by airbag
A technology of an offshore drilling platform and a process method, which is applied to ship parts, ships, transportation and packaging, etc., can solve the problems of high construction cost and construction difficulty, and achieve the effect of lowering the threshold, reducing the construction cost and shortening the launching period.
Inactive Publication Date: 2014-12-31
CHINA PETROLEUM LIAOHE EQUIP +1
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Problems solved by technology
It overcomes the shortcomings of the existing jack-up offshore drilling platform launching technology that the construction of the jack-up platform needs to have large-scale infrastructure facilities such as large docks, complex slideways or semi-submerged barges, and the construction cost is high and the construction is difficult.
Method used
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Experimental program
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Effect test
Embodiment Construction
[0018] A process method for launching an airbag on a jack-up offshore drilling platform, the steps of the method are as follows:
[0019] 1. The platform is built horizontally on the berth: the construction piers with different front height and rear height are arranged, and the platform is built horizontally;
[0020] 2. Adopt super-large and ultra-high-pressure water airbags;
[0021] 3. Extend the bearing section of the berth structure: According to the water level and bearing capacity requirements of the platform launching calculation book, extend the length of the bearing section of the berth, and carry out sea sweeping operations in the launching water area, remove sharp and hard debris, and avoid cutting the hull during launching;
[0022] 4. Arrangement of construction piers;
[0023] 5. Use the spud shoe plugging tool to block the spud shoe: the spud shoe plugging tool is designed with a steel-wood structure, and the steel wire sling is used to connect and fix the pla...
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The invention relates to the technical field of offshore oil drilling, in particular to a launching process of a jack-up offshore drilling platform by an airbag. The process includes the steps of firstly, horizontally constructing the platform on a building berth; secondly, using an over-sized and ultrahigh-pressure launching airbag; thirdly, lengthening a bearing segment of the structure of the building berth; fourthly, distributing a construction pier; fifthly, using a footing blocking fixture to block footings; sixthly, performing secondary pier reversing after closing the platform; seventhly, dragging the fixed platform; eighthly, distributing the airbag below a main hull of the platform; ninthly, removing the construction pier of the platform; tenthly, shifting the platform to the water edge after second pier reversing; eleventhly, releasing to launch; and twelfthly, recovering the airbag and the footing blocking fixture. The drilling platform uses the airbag which is stable, efficient and low in cost to launch, the airbag is stable and controllable, launching period of the platform is shortened, construction cost and difficulty in construction of the platform are greatly reduced, and requirements of the platform for shipyards are lowered effectively.
Description
Technical field: [0001] The invention relates to the technical field of offshore oil drilling, in particular to an air bag launching process method of a self-elevating offshore drilling platform. Background technique: [0002] The launching technology of jack-up offshore drilling platform mainly adopts dock launching, slipway launching and barge launching at home and abroad. Dock launching technology has high requirements for the basic construction of the shipyard. The shipyard must have a large dock suitable for the platform to be built. This technology is only applicable to shipyards with large docks, and ordinary small and medium-sized shipyards cannot be applied. The slipway launching technology of the slipway needs to have the slipway required for launching, which requires additional investment costs; while the slipway installed with the slipway limits the applicability of the construction project of the slipway, and the stability control of the launching is relatively ...
Claims
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IPC IPC(8): B63B9/00
Inventor 胡德祥吕宏伟赵京坤张晓宇王建才许明玉于鹏飞杨丰
Owner CHINA PETROLEUM LIAOHE EQUIP