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A dry tree semi-submersible platform with self-installation function

A semi-submersible platform, self-installation technology, applied in the direction of ships, floating buildings, etc., can solve the problems of restricting the popularization and application of platforms, deep water and marginal oil fields cannot be effectively developed, construction sites, and high requirements for ship resources. Effect of dry tow transportation and improvement of heaving performance

Active Publication Date: 2020-03-03
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned traditional methods have complex technological processes, high requirements on construction sites and ship resources, and the cost occupies a large proportion of the overall development investment of the platform, making it impossible to effectively develop a large number of deepwater and marginal oil fields, which limits the popularization and application of the platform

Method used

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  • A dry tree semi-submersible platform with self-installation function
  • A dry tree semi-submersible platform with self-installation function
  • A dry tree semi-submersible platform with self-installation function

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0040] like figure 1 Shown is the three-dimensional schematic diagram of the whole dry tree semi-submersible platform of the present invention, platform slipway, mooring system and riser system. Among them, the platform hull includes an upper box-shaped deck 2, a lower pontoon box 4, and a heave plate 7 from top to bottom. An oil and gas treatment module is arranged on the deck 2, and a moon pool 15 of 15 meters square is opened in the middle of the lower buoyancy tank 4, and a riser system 16 is arranged in the moon pool 15. The upper box-shaped deck 2 and the lower pontoon 4 are supported by four uprights 3, the diameter of the uprights 3 is 8 meters, the lower end of which is rigidly fixed to the lower pontoon 4, and the inside of the lower pontoon 4 is provided with a ballast tank, surrounded b...

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Abstract

The invention discloses a dry tree semi-submersible platform with a self-mounting function. The dry tree semi-submersible platform with the self-mounting function comprises a platform hull; the platform hull comprises an upper deck, a lower buoyancy tank and a heave plate in sequence from top to bottom; the upper deck and the lower buoyancy tank are supported by four uprights; the uprights are fixedly connected to the lower buoyancy tank; the uprights can slide in the vertical direction of the upper deck; the tops of the uprights are fixedly connected with the upper deck; the lower buoyancy tank is connected with the heave plate through a mooring cable; and a ballast tank is arranged in the lower buoyancy tank. The dry tree semi-submersible platform with the self-mounting function has theadvantages that an upper module and a platform hull can be built on a shipyard or a slipway in an integrated manner without being mounted in a closed manner; after the building is finished, the overall gravity center of the platform is lower to be beneficial for dry towing transportation; as the heave plate is arranged at the bottom of the platform, the heaving motion performance can be improved to realize dry tree oil extraction; the mooring cable tie-back operation can be finished by using a platform crane, and the pretension force of the mooring cable is produced by deadweight of the heaveplate, and the platform does not need a windlass.

Description

technical field [0001] The invention relates to a dry tree semi-submersible platform with self-installation function, which belongs to the technical field of marine engineering. Background technique [0002] The semi-submersible production platform has good seakeeping performance, a large deck area, and a wide range of water depths. It is an ideal platform type for developing deep-sea oil and gas fields. The draft of the semi-submersible platform is deep, and the construction of the upper module and the hull of the platform is usually completed by the split construction method, and then the closure is completed by the overall hoisting or offshore hoisting method, and the mooring system is connected by the installation ship. The above-mentioned traditional methods have complex technological processes, high requirements on construction sites and ship resources, and the cost occupies a large proportion of the overall development investment of the platform, making it impossible ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B35/44
CPCB63B35/44B63B2035/442
Inventor 谢彬粟京谢文会赵晶瑞王世圣韩旭亮李阳冯加果
Owner CHINA NAT OFFSHORE OIL CORP
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