Hybrid mooring system for ultra-deepwater floating structures and mooring method

A mooring system and water-floating technology, applied in the field of offshore oil and gas development, can solve the problems of high cost, heavy weight and complex technology, and achieve the effects of light weight, weight reduction and simple technology

Active Publication Date: 2014-01-01
佛山市榕岸海洋工程装备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of heavy weight, high cost and complicated technology in the prior art, and propose a floating structure in ultra-deep water (below 3000m deep water) with light system weight, simple technology and low cost. Hybrid mooring system and its mooring method

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  • Hybrid mooring system for ultra-deepwater floating structures and mooring method

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Embodiment Construction

[0023] see figure 1 and figure 2 As shown, the present invention includes an ocean platform 2 floating on the sea level 1, and a control module 7, a GPS 8, a support 3, and a winch 4 are installed on the ocean platform 2. One end of the tensioned mooring cable 10 is fixed to the seabed 13 through the first seabed anchor 11 , and the other end is connected to the winch 4 of the offshore platform 2 . A first tension sensor 6 is installed on the tensioned tether 10 . One end of the catenary type mooring cable 9 is fixed on the seabed 13 by the second seabed anchor 12, and the other end is connected on the support 3, and the second tension sensor 5 is housed on the catenary type mooring cable 9.

[0024] The control module 7 is respectively connected with the GPS 8 , the first tension sensor 6 , the second tension sensor 5 and controls the action of the winch 4 . The GPS 8 is used to measure the real-time motion response value of the ocean platform 2 , and the control module ...

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Abstract

The invention discloses a hybrid mooring system for ultra-deepwater floating structures and a mooring method in the field of marine engineering oil and gas development. The mooring method includes: recording a motion response value of an ocean platform in real time by a GPS (global position system), when the motion response value is lower than a preset reasonable response value, judging the current ocean condition to be the ordinary ocean condition, and otherwise the limit ocean condition; when in the limit ocean condition, straining a tension-type mooring line, and transmitting tension A on a catenary-type mooring line and tension B on the tension-type mooring line to a control module by a second tension sensor and a first tension sensor respectively; calculating a value C through a formula by the control module, if the value C is smaller than a preset reasonable difference, keeping the tension-type mooring line constant in length, otherwise comparing the tension A with the tension B, if A is smaller than B, loosening the tension-type mooring line in length, and if A is larger than B, shrinking the tension-type mooring line in length. By the mooring method, intelligent switching between a single set of catenary-type mooring line system and the hybrid mooring system can be automatically completed, and the mooring method is simple and convenient and rapid.

Description

technical field [0001] The invention relates to a mooring system, in particular to a mooring system for ultra-deep water floating structures, and belongs to the field of marine engineering oil and gas development. Background technique [0002] More than 80% of the world's marine oil reserves are concentrated within a water depth of 500m, but more than 70% of the ocean area is between 3000m and 6000m, and a large amount of sea area remains to be proven. At present, except for a few sea areas, the offshore oil and gas resources in most areas have been gradually exhausted, and the development of deep sea has become an inevitable trend. The main problems encountered in the development of oil and gas resources in the deep sea are: the marine environment in the deep sea is harsher, and the environmental load is greater. Whether it is for a drilling platform or a production platform, in the deep sea environment, the mooring system is to ensure the offshore platform. Important equi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B21/50B63B21/16
Inventor 朱建窦培林陈刚袁洪涛施兴华孔令海
Owner 佛山市榕岸海洋工程装备有限公司
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