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Multi-point mooring system suitable for cylindrical FPSO and design method thereof

A multi-point mooring and design method technology, which is applied in ship design, ship parts, ships, etc., can solve the problem that the tension is greater than the specification requirements, and achieve the effects of small fatigue load, improved safety, and low maintenance cost

Pending Publication Date: 2022-02-11
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above technical problems, the present invention provides a multi-point mooring system suitable for cylindrical FPSO and its design method, which is used to solve the problem that the mooring system of a floating production platform that needs to be suitable for a larger mooring radius may have tension Practical engineering problems such as greater than the specification requirements and bottoming of polyester cables in shallow and medium water depths

Method used

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  • Multi-point mooring system suitable for cylindrical FPSO and design method thereof
  • Multi-point mooring system suitable for cylindrical FPSO and design method thereof
  • Multi-point mooring system suitable for cylindrical FPSO and design method thereof

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Embodiment 1

[0063] This embodiment provides a mooring method, and the operating water depth of the offshore platform is 313m. Its structure is described in detail below.

[0064] Table 1 shows the components of each section of the mooring rope

[0065]

[0066] The mooring system consists of 8 sections in total, and the length of section 1, that is, the upper anchor chain 1, is adjusted according to the pretension requirement. In this embodiment, the pretension of the upper anchor chain 1 in the mooring system is 12% of the breaking load, and the pretension can be adjusted according to specific requirements. The pretension of the tensioned mooring system is generally 10% to 16%. between breaking loads.

[0067] figure 1 It is the top view of the mooring system layout. The direction of 45 degrees to the northeast is the direction with the largest wind and wave load. A set of mooring lines is set. The angle between the other two sets of mooring lines and this set of mooring lines is 1...

Embodiment 2

[0071] This embodiment provides another mooring method, and its structure will be described in detail below.

[0072] Table 2 shows the components of each section of the mooring rope

[0073]

[0074] The difference between this embodiment and embodiment 1 is the connection form of the buoy 4, what this embodiment uses is an online buoy, such as Figure 4 As shown, the buoy 4 can be directly connected between the polyester cables 9 at both ends, without installing chains 12, triangular plates 11 and other auxiliary components, which can greatly reduce the weight around the buoy 4, and then achieve better buoyancy effect. Figure 4 Shown in is the two buoyancy blocks that constitute the buoy 4, the polyester cable 9 can pass between the two buoyancy blocks, the upper two buoyancy blocks are connected to the lower buoyancy block with bolts 15, the specific connection form is determined by the supplier . This kind of online buoy has no special requirements on the weaving pro...

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Abstract

The invention relates to a multi-point mooring system suitable for a cylindrical FPSO and a design method thereof. The multi-point mooring system comprises a plurality of sets of mooring cables, each set of mooring cables comprises a plurality of mooring cables, each mooring cable comprises an upper anchor chain, a lower anchor chain, an upper polyester cable, a lower polyester cable and a buoy, the upper end of each upper anchor chain is connected with a cable guide hole of a floating production platform through a platform chain, the lower end of the upper anchor chain is connected with the upper end of the upper polyester cable through an installation chain, the two ends of the buoy are connected with the lower end of the upper polyester cable and the upper end of the lower polyester cable respectively, the lower end of the lower polyester cable is connected with the upper end of the lower anchor chain through an installation chain, the lower end of the lower anchor chain is connected to a mud entering point, so that the multi-point mooring system is formed. According to the system, the platform operation safety is improved, meanwhile, the construction and purchase cost is effectively saved, a solution is provided for a novel cylindrical FPSO mooring system suitable for medium-shallow water depth in the sea area of the South China Sea, and long-term investment of deep sea oil and gas exploration and development is facilitated.

Description

technical field [0001] The invention relates to a multi-point mooring system suitable for a cylindrical FPSO and a design method thereof, belonging to the technical field of offshore oil development. Background technique [0002] As my country's offshore oil and gas reserves are very rich, the main battlefield of my country's oil and gas development and exploration has developed from inland and shallow seas to deep seas. In order to extract oil and gas in the deep sea, it is usually necessary to build an oil and gas production platform on the deep sea surface that integrates deep sea drilling, oil and gas processing, oil storage, oil unloading, power generation, heating and living, and then the oil and natural gas are transported through pipelines Delivery to tankers or onshore oil or gas storage tanks. Oil and gas production platforms are generally suspended on the deep sea surface. In order to drill wells from the deep sea and transport the drilled oil and gas, the curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B21/50B63B21/20B63B71/00
CPCB63B21/50B63B21/20B63B71/00B63B2021/505B63B2021/203
Inventor 李达易丛贾旭王忠畅李刚白雪平杨旭张婧文付升雷付殿福苏云龙于博骞宋春辉
Owner CHINA NAT OFFSHORE OIL CORP
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