Docking octagonal floating production storage system

Abstract

The invention discloses a butting octagonal frustum pyramid type floating production and oil storage system. A floating body of the butting octagonal frustum pyramid type floating production and oil storage system is provided with an upper structural body in an octagonal frustum pyramid shape and lower structural body in a regular octagonal frustum pyramid shape. Under a combined state, the bottom face, with a small area, of the upper structural body is fixedly connected with the bottom face, with a small area, of the lower structural body to form a connecting surface. The axis of the upper structural body and the axis of the lower structural body are arranged in an identical straight line, the bottom, with a big area, of the upper structural body is an upper deck of a floating structure, and the bottom, with a big area, of the lower structural body is a lower bottom of the floating structure. The connecting surface is the full loading water plane line of the floating structure. On the basis of the mentioned structure, a mooring locating module, an oil and gas production module, a storage module, an outward conveying module and other function modules are arranged to form a novel floating type production and oil storage system. The floating body has the appearance characteristics similar to a hourglass, the butting octagonal frustum pyramid type floating production and oil storage system can make up the defects of a traditional floating production and oil storage system at the aspects of seakeeping performance, strength fatigue, pipeline layout and the like, and the functions of the butting octagonal frustum pyramid type floating production and oil storage system are expanded.

Description

technical field [0001] The invention relates to patent classification B63 Ships or other water craft; Ship-related equipment B63B Ships or other water craft; Marine equipment B63B35 / 00 Ships suitable for special purposes or similar floating structures B63B35 / 44 Floating structures, water Tanks, water drilling platforms or water workshops, such as those carrying oil-water separation equipment. Background technique [0002] In the field of marine engineering, the Floating Production Storage and Offloading system (FPSO) is an offshore oil and gas processing system that integrates oil and gas processing, oil storage and offloading, heating, power generation, control, and living functions. Because of its strong oil storage capacity and wide applicability, it has gradually become the mainstream way of developing offshore oil fields in the world. [0003] Usually, the FPSO system mainly includes various modules such as floating main body, mooring positioning, oil storage and expor...

AI Technical Summary

Problems solved by technology

[0005] 1. The natural period of the heave of the traditional ship-type FPSO is difficult to stay away from the area where the wave energy is concentrated, and the amplitude of the heave motion is relatively large

In addition, the ship-type FPSO is very sensitive to the direction of wave action, and the lateral head wave area is too large, so the rolling motion performance is poor

These will seriously affect the normal operation of various equipment and instruments of FPSO, as well as the quality of crude oil produced and the comfort of personnel

[0006] 2. Although the single point mooring system equipped with internal turret and fluid joints can make the traditional ship type FPSO have a windvane effect of 360o all-round free rotation, severe yaw motion will not only affect the normal operation of many operations, but also Severe wear on the inner turret and fluid connections, requiring frequent maintenance

Therefore, the expensive price of the internal turret and fluid joints themselves, as well as the existence of potential downtime, will greatly increase production costs

[0007] 3. The longitudinal scale of the traditional ship-type FPSO is relatively large, and the corresponding longitudinal bowing and sagging bending loads are large, making the floating body vulnerable to bending and fatigue damage

Therefore, in order to meet the requirements of strength and fatigue load, local reinforcement is generally required, which increases the cost of FPSO

[0008] 4. The slender buoys and decks of traditional ship-type FPSO will increase the length and layout difficulty of connecting piping systems among many functional modules, thus potentially increasing construction and maintenance costs

However, at the same time, there are many shortcomings in its performance: the heaving motion of the floating body is large, which is easy to cause vortex-induced vibration, the deck area is small, the living and working spaces are too close, and it is not conducive to the separation of dangerous areas and non-dangerous areas, etc.

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