An external transport device for deep-sea column-type production, storage and unloading platform

Abstract

The invention discloses an external delivery device for a deep-sea column type production, storage and unloading platform, which is characterized in that it includes a ring track, a tackle, a mooring cable system, a shuttle tanker and a floating hose; the ring track is located above the sea surface , and fixed on the deep-sea column-type production, storage and offloading platform through trusses; the trolley is installed on the circular track, and can slide freely along the circumference of the circular track; the shuttle tanker floats on the sea surface, and The mooring cable system is connected to the tackle, and the floating hose is connected between the deep-sea column-type production, storage and offloading platform and a shuttle tanker for transporting crude oil. The device of the invention can make the shuttle tanker always be located in the downwind direction and the back wave direction of the platform, without adding single-point buoys and dynamic positioning shuttle tankers, so that the whole device has the advantages of safe operation, high economy and convenient maintenance, and can provide crude oil Develop and improve the equipment base.

Description

technical field [0001] The invention relates to an external delivery device for a deep-sea column type production, storage and unloading platform, belonging to the field of marine oil and gas development. Background technique [0002] The traditional floating production and storage system (referred to as FPSO) is a ship-shaped structure, positioned through a single-point mooring system, and can freely rotate around the single-point mooring system in the horizontal plane under the action of wind waves and currents (referred to as "weathervane effect"). The crude oil transportation method mostly adopts the form of series connection, that is, the shuttle tanker is connected in series at the tail of the FPSO and transported through a floating hose. Under the action of wind, wave and current, the FPSO and the shuttle tanker can rotate around the single point mooring system together. A typical deep-sea column-type production storage and offloading platform 100 (English full name i...

AI Technical Summary

Problems solved by technology

However, although the above two export methods can solve the problem of crude oil export and avoid collisions between shuttle tankers and platforms, they still have the following disadvantages: (1) Currently, the number of dynamic positioning tankers is still small, especially in the Chinese sea area. One is in use, so it needs to build a new dynamic positioning tanker, which requires a large investment; (2) The consumption of a dynamic positioning tanker is also greater than that of an ordinary tanker during operation, and the cost of operation and maintenance is higher; (3) adding a deep-water single point The cost of construction and installation of buoys is about 60 million U.S. dollars, which is about 5 to 8 times higher than the traditional stringing scheme

Although this method has low input and operating costs, it adds a lot of risks and uncertainties

First of all, the drag force of the tugboat is limited. When the wind and waves are suddenly large, the capacity of the tugboat 700 is not enough to hold the tanker 500, so there is a hidden danger of collision with the platform; in addition, the movement range of the shuttle tanker 500 is only about 170 degrees in one direction of the platform. range, it is impossible to realize that the shuttle tanker 500 is always in the leeward direction and the back wave direction of the platform 100

Images