Offshore platform

Abstract

The invention discloses an offshore platform, and belongs to the technical field of platforms. The offshore platform is designed for solving the problems such as that an existing structure is poor inapplicability. The offshore platform includes an upper portion module, a flotation box, a truss assembly, a suction anchor assembly, and a lifting system. The upper portion module is arranged above the flotation box and / or arranged in the flotation box. The flotation box and the suction anchor assembly are separately connected with the truss assembly. The flotation box can move up and down along the truss assembly through the lifting system. The offshore platform is compact in whole structure, and can withstand a hundred years of wind and waves; scale limiting to the upper portion module is small; the platform can be moved and can be used repeatedly; operation in a deeper water sea area can be achieved; in addition, according to the offshore platform, platform on-sea self-installation is achieved; cooperation of large construction ships is not needed; and the installation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of platforms, in particular to a century-old storm-resistant, movable and reusable offshore platform suitable for marginal oil fields. Background technique [0002] At present, the types of platforms applicable to marginal oilfields mainly include: simple platform, Sany mode (a simple platform + a sea pipe + a cable), Little Bee mode (a simple platform + a shuttle tanker), Mini WHP ( MiniWellhead Platform, simple wellhead platform) + MOPU (Mobile Offshore Production Unit, offshore mobile production platform) mode, WHP + FPSO (Floating Production Storage and Offloading, offshore floating production storage ship) mode, subsea oil production tree + FPSO mode, etc. [0003] The above platform types suffer from the following problems: [0004] (1) The structure of the simple platform is very simple. It is only equipped with wellhead trees and relies heavily on other surrounding platform facilities, including ele...

AI Technical Summary

Problems solved by technology

[0006] (3) The Little Bee model is irresistible to the century-old wind and waves, and the export depends on the shuttle tanker, and because the oil storage is connected with the production, it has high requirements for production safety

[0007] (4) Mini WHP+MOPU mode requires high installation accuracy. After the WHP is installed, it needs to be connected to the MOPU as soon as possible. A single WHP is irresistible for centuries.

[0008] (5) WHP+FPSO mode, a single WHP has a large investment scale and cannot be moved, so it cannot adapt to various water depth ranges

FPSO is irresistible to the century-old storm, which has a great impact on the continuous production of the platform

[0009] (6) Underwater Christmas tree + FPSO mode, the cost of underwater Christmas trees is high, and FPSO cannot withstand centuries of wind and waves, which has a great impact on the continuous production of the platform

[0010] It can be seen that the above-mentioned platforms either have the problem of adapting to the small range of operating water depth, or the problem of strength, or the problem of limited scale of the upper module, or the problem of high cost, and all the above-mentioned platforms cannot be moved or reused.

Poor applicability of the above existing platforms

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