Tensioned anchor leg buoy for single point oil unloading system

Abstract

The invention relates to the technical field of mooring of offshore oil discharging pipelines, in particular to a tensioning type anchor leg buoy of a single-point oil discharging system. The tensioning type anchor leg buoy of the single-point oil discharging system comprises a tensioning type anchor leg buoy body, and the tensioning type anchor leg buoy body comprises a buoyant mooring part. The tensioning type anchor leg buoy of the single-point oil discharging system is structurally characterized in that the buoyant mooring part is cylindrical, and a damping ballast part is arranged at the bottom of the buoyant mooring part and comprises an annular cylinder mounted at the center of the bottom of the buoyant mooring part and a ballast tank. According to the tensioning type anchor leg buoy of the single-point oil discharging system, the scantling draft and the wet surface area are increased, and accordingly the additional mass and additional damp of a structure are improved.

Description

technical field [0001] The invention relates to the technical field of mooring of offshore oil unloading pipelines, in particular to a tensioned anchor leg buoy of a single-point oil unloading system. Background technique [0002] The single-point oil unloading system is currently a commonly used oil unloading method for offshore oil transportation. It replaces the traditional wharf unloading method. Its advantages are: it can be built at any desired offshore location, and it is not limited by the channel and water depth. Its disadvantages are: due to the small size of the buoy, its movement under the load of the marine environment often causes the oil hose at the lower end of the buoy to have a large curvature during the movement, especially in sea areas with a large tidal range. The dynamic curvature is greater than 1.2, but the current hose technology can only achieve an allowable curvature of 0.5, which leads to excessive damage to the hose, greatly reducing the service ...

AI Technical Summary

Problems solved by technology

Its disadvantages are: due to the small size of the buoy, its movement under the load of the marine environment often causes the oil hose at the lower end of the buoy to have a large curvature during the movement, especially in sea areas with a large tidal range. The dynamic curvature is greater than 1.2, but the current hose technology can only achieve an allowable curvature of 0.5, which leads to excessive damage to the hose, greatly reducing the service life of the hose, and has to be replaced frequently (period of about one year) in engineering hose method to keep the system working properly

[0005] Under most design working conditions, the oil delivery hose of the existing single-point oil unloading system has a dynamic curvature greater than the allowable curvature of the hose, which causes early damage to the hose and greatly shortens the replacement cycle of the hose. Only a few single point oil unloading systems require annual hose replacement

Images