Oblong floating production storage and offloading (FPSO) ship

Abstract

The invention provides an oblong floating production storage and offloading (FPSO) ship. The contour line of the top view of the oblong FPSO ship is in an oblong shape formed by one rectangle and two semicircles. The oblong FPSO ship adopts a multi-point mooring system, four mooring points are arranged at the stern and the bow of the FPSO ship in a port / starboard symmetry mode, each mooring point is composed of two sets of mooring ropes forming an included angle, and each set of mooring ropes comprises three mooring ropes. On the basis of the shape of an outer shell and the arrangement mode of the mooring points, the effect that the FPSO ship rotates within the range from 0 degree to 90 degrees is achieved by increasing or decreasing the length of the mooring ropes, and the effect that the length direction of the FPSO ship is always opposite to the incoming flow direction can be ensured. The FPSO ship applies the symmetry characteristic, so that the multi-point mooring system is applied, the function of a single-point mooring system is achieved, and the production and maintenance cost is reduced. The length-width ratio of a ship body ranges from 3:1 to 4:1, good seakeeping performance is achieved, and certain advantages are achieved on the aspects of strength fatigue and module layout.

Description

technical field [0001] The invention relates to an offshore floating production storage ship, in particular to an oblong FPSO ship, which is suitable for the FPSO ship in the South China Sea. Background technique [0002] Floating Production Storage and Offloading (FPSO) has the functions of production processing, oil storage and export, and is usually fixed on the sea surface by single-point mooring mode; it is usually connected with drilling FPSO ships or subsea oil production The system constitutes a complete oil recovery, crude oil treatment, oil storage and oil unloading system. Its operating principle is: through the subsea oil pipeline, the crude oil extracted from the subsea oil well is received, processed on board, stored in the cargo oil tank, and finally transported to the shuttle tanker through the unloading system. [0003] The shape of FPSO ship is the main factor affecting its hydrodynamic performance and the total longitudinal bending moment. The quality of...

AI Technical Summary

Problems solved by technology

[0006] 1) The single point mooring system is expensive and requires frequent maintenance, and there is a risk of shutdown due to damage;

[0007] 2) The dynamic response of the hull of the ship to the waves is obvious, especially the rolling and heaving motions caused by the waves are more serious, which directly affects the normal operation of the instruments and equipment on board, and also affects the work efficiency and living comfort of the wearing staff. sex

[0008] 3) Although the weather vane effect greatly reduces the environmental load on the FPSO, the bending load of the FPSO hull in the hogging and sagging states is relatively large in the head-wave and wave-following states, and the uncertainty of the waves leads to the The long-term alternating loads make the ship-type FPSO have the risk of fatigue damage

However, its engineering and process modules are difficult to effectively separate from the living area, which has certain potential dangers

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