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Multi-stand-column semi-submersible platform for cylindrical floating box

A semi-submersible platform and floating tank technology, applied in the direction of floating buildings, etc., can solve the problems of magnified wave load, unfavorable platform structure safety, etc., and achieve the effect of reducing the range of motion, insensitive to the direction of the environment, and reducing the amount of steel

Inactive Publication Date: 2015-12-16
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in the length of the buoyancy box will increase the local stress at the connection position between the buoyancy box and the column, which is not conducive to the safety of the platform structure. The natural period of oscillating motion to amplify the wave load

Method used

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  • Multi-stand-column semi-submersible platform for cylindrical floating box
  • Multi-stand-column semi-submersible platform for cylindrical floating box

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Embodiment Construction

[0015] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0016] like figure 1 As shown, the present invention provides a cylindrical pontoon multi-column semi-submersible platform, which includes a cylindrical pontoon 1, a vertical column 2, a platform deck 3, an anchoring equipment 4, a living building 5, a crane 6, a lifeboat 7, a drilling rig Riser and drill pipe stowage area 8 , helicopter deck 9 , moon pool 10 and derrick 11 .

[0017] The bottom of the semi-submersible platform is provided with a cylindrical buoyancy tank 1, which provides the main buoyancy for the entire semi-submersible platform, and its interior is divided into a plurality of watertight compartments for storing drilling materials, fuel oil and other consumables, Anchor cables and ballast water. The peripheral edge of the top of the cylindrical pontoon 1 is connected to the bottom of the platform deck 3 through more than four uprigh...

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Abstract

The invention relates to a multi-stand-column semi-submersible platform for a cylindrical floating box. The cylindrical floating box is arranged at the bottom of the semi-submersible platform. The inner portion of the cylindrical floating box is divided into a plurality of watertight cabins used for storing well drilling materials, consumables, anchor cables and ballast water. The circumference of the top of the cylindrical floating box is connected with the bottom of a platform deck through four or more stand columns. Branch cabins used for storing fresh water and drilling mud materials and elevator passageways penetrating the cylindrical floating box and the top of the platform deck are arranged in the stand columns. A generator set, an electrical equipment room and a drilling support device are arranged in the platform deck. A drilling or oil-gas production facility is arranged on the platform deck. The multi-stand-column semi-submersible platform is high in loading capacity adaptability, low in center of gravity, good in stability, small in movement range, high in overall strength, insensitive in environment direction, capable of changing the draft, capable of being towed by a tug or conducting self-propulsion through a propeller, simple in structure, convenient to construct and suitable for drilling and oil-gas production work of oil-gas fields in shallow sea and deepwater sea areas.

Description

technical field [0001] The invention relates to an offshore semi-submersible platform, in particular to a cylindrical floating box multi-column semi-submersible platform suitable for the technical field of marine engineering. Background technique [0002] Semi-submersible drilling platform is one of the main equipment for drilling and development of offshore oil and gas fields, and semi-submersible production platform is an important member of the family of deep-water floating production platforms, both of which use semi-submersible hulls as platform carriers. The hull of a typical semi-submersible platform is generally composed of two or four cuboid pontoons and four or six columns, and has been widely used in all sea areas around the world. [0003] With the development of offshore oil and gas development to deep water areas, the demand for variable load and loading capacity of semi-submersible drilling platforms and semi-submersible production platforms continues to incre...

Claims

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Application Information

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IPC IPC(8): B63B35/44
Inventor 冯玮谢彬杜庆贵赵晶瑞李迅科粟京朱江王春升
Owner CHINA NAT OFFSHORE OIL CORP
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