JP2001260982A - Floating body type petroleum storage/delivery facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floating body type petroleum storage/delivery facility capable of reducing the construction cost. SOLUTION: A plurality of petroleum storage tanks 7 storing the petroleum from a submarine oil field 3 are provided in the longitudinal direction on a floating body 2 of a rectangular solid shape, and the petroleum in the petroleum storage tanks 7 is delivered to a petroleum carrier in this floating body type petroleum storage/delivery facility 1. A space 8 loaded with no petroleum is provided at the central part of a plurality of petroleum storage tanks 7 provided in the longitudinal direction, and the vertical bending moment applied to the floating body can be reduced as compared with the case having no space, for example, when petroleum is fully loaded in the petroleum storage tanks.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating oil storage and dispensing facility.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, an oil storage and discharge facility (oil relay base) [Floa
ting production, storage and offloading system (F
PSO) or Floating storage and offloading syst
em (FSO)] 51, a hull 52 of the ship is provided on a hull 52 with a refining treatment facility 53 for primary or secondary refining of pumped crude oil and a plurality of storages for storing these refined oils. An oil storage tank 54 is provided.

[0003] In this oil storage and dispensing facility, a plurality of oil storage tanks 54 are each provided with a hull 5.
2 (exactly the width excluding the portion of the narrow ballast tank provided in the bow direction along the sides of both ships), and each is arranged adjacent to each other in the bow direction. I have.

[0004]

As described above, since the plurality of oil storage tanks 54 are arranged almost to the full width of the hull 52 and adjacent to each other in the bow-stern direction, FIG. As described above, when the oil is fully loaded, the hull 52 depends on the oil loading weight and the weight W 'of the refining facility.
A large vertical bending moment M 'acts on the center of the hull 52, so that it is necessary to reinforce the center of the hull 52 by using a large amount of steel material, resulting in a problem that the construction cost is high.

Accordingly, an object of the present invention is to provide a floating oil storage and dispensing facility capable of reducing construction costs.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a floating oil storage and dispensing facility of the present invention comprises a hull-shaped floating body and an oil storage tank for storing oil from an offshore oil field, A floating oil storage and dispensing facility which is provided in the bow direction and is configured to discharge the oil in each of the oil storage tanks to the oil carrier, wherein the plurality of oils provided in the aft direction are provided. In the central part of the storage tank, a space where oil is not loaded is provided, and the floating body in the above configuration is formed in a rectangular parallelepiped shape, and further, at least the lower part of the bow and stern part of the rectangular shaped floating body is obliquely cut. It has an inclined surface.

According to each of the above constructions, a space in which no oil is loaded is provided at the center of the floating body in the aft direction, so that, for example, when all the oil storage tanks are full of oil, compared to the case where there is no space. Therefore, the vertical bending moment acting on the floating body can be reduced, so that the reinforcement at the central portion of the floating body can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A floating oil storage and dispensing facility according to a first embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a floating oil storage and dispensing facility 1 includes a floating body 2 having a hull shape, more precisely, a rectangular parallelepiped shape (also referred to as a box shape), and a submarine oil field 3.
And a refinery processing facility 6 for guiding crude oil from the oil well through an outlet pipe 5 to perform primary and secondary refining processes and the like. An oil storage tank 7 for storing the stored oil is provided.

The shape of the floating body 2 will be described in detail. As shown in FIGS. 2 and 3, the floating body 2 is formed in a rectangular hull shape in plan view, and has a bottom portion and a Both sides of the vessel are shaped so as to have inclined surfaces 2a and 2b, which are plane portions cut obliquely, and a plurality of oil storage tanks 7 for storing oil are arranged in two rows by six rows. There are a total of twelve (of course not limited to twelve), and no oil is stored in the central part of the oil storage tanks 7 arranged in these two rows, that is, no oil storage tank is arranged. A space 8 is provided. This space 8 is used, for example, as a ballast tank, a pump room, and the like.

In the floating oil storage and dispensing facility 1, crude oil derived from an oil well in the offshore oil field 3 is guided to a refining treatment facility 6 provided above the floating body 2 via a discharge pipe 5 to perform predetermined refining. After the treatment, these refined products (oil) are stored in an oil storage tank 6 provided in the floating body 2.

The oil stored in the oil storage tank 6 is delivered to an oil carrier (tanker) reciprocating between a land-based oil base and transported to the oil base. As described above, since the space 7 in which no oil is loaded is provided at the center of the floating body 2 of the floating oil storage and dispensing facility 1 in the aft direction, for example, all the oil storage tanks 6 are full of oil. In this case, the load W and the vertical bending moment M acting on the floating body 2 are as shown in FIG. 4, for example, as compared with the maximum vertical bending moment M 'in the case where the space 7 is not provided unlike the prior art. Can be greatly reduced.

[0013] Therefore, in the past, considerable reinforcement was required at the center portion of the floating body. However, since the reinforcement can be reduced, the construction cost can be reduced.

When a ballast tank is provided in the space 7 at the center of the floating body 2, after discharging oil, seawater is loaded into the ballast tank, whereby the ballast tank is vertically bent in a direction opposite to that when the oil is full. Moment (hogging) can be prevented from occurring.

Next, a floating oil storage and dispensing facility according to a second embodiment of the present invention will be described with reference to FIG. In the first embodiment, the space is provided over the entire width of the center of the floating body. In the second embodiment, however, the space is provided in a part of the center of the floating body. Things.

That is, as shown in FIG. 5, for example, the oil storage tanks 7 provided in the floating body 2 are arranged in three rows (three rows) in the width direction and five rows (five rows) in the aft direction. The space 11 is provided on both sides of the center row in the bow and tail direction.

Also in this case, similarly to the first embodiment,
Since the vertical bending moment acting on the floating body 2 can be reduced, and thus the reinforcement at the central portion of the floating body can be reduced, the construction cost can be reduced.

In the above embodiments, the bottom of the stern and the sides of both sides of the hull are cut obliquely, but only the bottom is cut obliquely, and the sides of both vessels are indicated by broken lines in FIG. Alternatively, the shape may be such that the corner 2c is left as it is without being cut.

[0019]

As described above, according to the floating oil storage and dispensing system of the present invention, a space for storing no oil is provided at the center of the floating body in the aft direction, so that, for example, oil is stored in all oil storage tanks. When fully loaded, the vertical bending moment acting on the floating body can be reduced as compared with the case where there is no space as in the past, and therefore the reinforcement at the center of the floating body can be reduced, so the construction cost Can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing an arrangement of floating oil storage and dispensing equipment according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a schematic configuration of a floating body in the floating oil storage and dispensing facility.

FIG. 3 is a horizontal sectional view of the floating body.

FIG. 4 is a diagram showing a vertical bending moment acting on the floating body.

FIG. 5 is a side view showing an arrangement of floating oil storage and dispensing equipment according to a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing a schematic configuration of a hull in a conventional oil storage and dispensing facility.

FIG. 7 is a diagram showing a vertical bending moment acting on the hull.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floating oil storage and dispensing equipment 2 Floating body 3 Offshore oil field 6 Refinery processing facility 7 Oil storage tank 8 Space 11 Space

Claims (3)

[Claims] A plurality of oil storage tanks for storing oil from an offshore oil field are provided on a hull-shaped floating body in an aft direction, and the oil in each of these oil storage tanks is discharged to an oil carrier. Floating oil storage and dispensing equipment as described above, characterized in that a space in which oil is not loaded is provided in the center of the plurality of oil storage tanks provided in the bow direction. Also payout facility. 2. A plurality of oil storage tanks for storing oil from an offshore oil field are provided on a floating body having a rectangular parallelepiped shape in a bow direction, and the oil in each of the oil storage tanks is discharged to an oil carrier. Floating oil storage and dispensing equipment as described above, characterized in that a space in which oil is not loaded is provided in the center of the plurality of oil storage tanks provided in the bow direction. Also payout facility. 3. The floating oil storage and dispensing equipment according to claim 2, wherein at least a lower part of the bow-tail portion of the floating body having a rectangular parallelepiped shape is cut obliquely to have an inclined surface.