CN111918818A

CN111918818A - Common pipeline of floating production equipment and laying method thereof

Info

Publication number: CN111918818A
Application number: CN201980019174.3A
Authority: CN
Inventors: 井上直; 上田友生
Original assignee: Mitsui Engineering and Shipbuilding Co Ltd
Current assignee: Mitsui Engineering and Shipbuilding Co Ltd
Priority date: 2018-04-27
Filing date: 2019-04-23
Publication date: 2020-11-10
Anticipated expiration: 2039-04-23
Also published as: CN111918818B; JP2019189181A; WO2019208553A1; KR102356515B1; KR20200138314A; JP7147117B2

Abstract

A plurality of first main piping members (26) having a predetermined length and having connection portions (26A) at both ends thereof, and a plurality of second main piping members (28) having a predetermined length and having connection portions (28A) at both ends thereof, each branching from a branch piping member (30) having a connection portion (30F) at a tip thereof, are connected in a ship length direction, thereby constituting a main piping (24) of a common pipeline (20). The connection part (30F) of the branch pipe (30) is configured such that: a plurality of branch pipe connecting parts are provided, the height of which is the same at any position in the ship length direction and the position of which is the same in the ship width direction.

Description

Common pipeline of floating production equipment and laying method thereof

Technical Field

The present invention relates to a common pipeline laid on a floating production facility such as a floating production storage and offloading Facility (FPSO).

Background

For example, in an offshore floating structure such as a floating production storage and offloading Facility (FPSO), various production facilities for oil production are arranged on an upper deck via modules. In general, a production facility is arranged on both sides of a pipe frame laid in the longitudinal direction of a hull near the center of the hull with the pipe frame interposed therebetween (patent document 1). Various utility resources (clean water, compressed air, nitrogen, fuel oil, seawater, and the like) are supplied from utility facilities provided in the hull to the production facilities via pipes (pipelines) laid under the pipe frames. The common line is connected to the production plant at a predetermined distribution point.

Prior art documents

Patent document

Patent document 1: JP patent publication No. 2017-154702

Disclosure of Invention

(problems to be solved by the invention)

In the process of constructing an offshore floating structure provided with a production facility such as an FPSO, for example, a hull including a utility facility is often constructed in a shipyard, and the design of the production facility is performed in parallel with the hull design and the hull construction. The production facility is mounted on the hull at another integrated yard (integration yard), and is connected to a common pipeline on the hull side at a preset distribution point. However, in the production facility, design changes are often made, and accordingly, design and arrangement of the common piping on the ship side need to be changed.

The invention aims to change the design and arrangement of a ship-side common pipeline simply, quickly and at low cost in accordance with the design change of production equipment in the construction of an offshore floating body structure with the production equipment.

(means for solving the problems)

The utility pipeline of the offshore floating body structure with the production facility of the present invention comprises: a first main fitting of a given length having connection portions at both ends; and a second main piping member of a predetermined length which branches into branch piping having a connection portion at a front end thereof and having connection portions at both ends thereof, wherein a plurality of the first main piping member and the second main piping member are combined and connected in a ship length direction to constitute main piping of a common pipeline, and at least 1 of the connection portions of the branch piping to the production facility is provided at any position in the ship length direction, and the height and the position in the ship width direction are the same.

The main pipe is arranged in a plurality of rows in the ship width direction, for example, and the length of the branch pipe in the ship width direction is different depending on the positions of the plurality of rows so that the positions of the connection portions of the branch pipe to the production facility in the ship width direction are the same. The branching position at which the branch pipe branches from the second main pipe in the longitudinal direction may be different depending on the positions of the plurality of rows.

The main pipe is laid along, for example, the center of the hull. The length of the first and second main pipe fittings is preferably a multiple of the length of the frame space of the hull structure. The branch pipe is, for example, crank-shaped, and branches in a height direction including an oblique direction from the second main pipe member, and thereafter extends in a horizontal direction with a tip end of the branch pipe directed in the height direction. The branch pipe is, for example, L-shaped, branches in a height direction including an oblique direction from the second main pipe, and then extends in a horizontal direction.

The branch pipe can be divided into a plurality of parts, for example. In this case, the dividing position of the branch pipe is set to a position extending in the height direction from the second main pipe fitting, for example. The dividing position of the branch pipe may be, for example, a position extending in the horizontal direction. The connection of the connection portion may be any of a flange joint, a sleeve joint, a screw joint, a clamp joint, a snap joint, butt welding, and the like, for example.

An offshore floating body structure provided with a production facility according to the present invention is provided with any one of the above-described common pipelines.

The method for laying a common pipeline of an offshore floating body structure with production equipment comprises the following steps: a plurality of main pipes each having a common pipeline formed by combining a first main pipe having a connection portion at both ends and a second main pipe having a predetermined length and connected in a ship length direction, the second main pipe branching into a branch pipe having a connection portion at a leading end and having connection portions at both ends; and the position of the connecting part of the branch piping is made to be the same in both height and width directions at any position in the length direction of the ship.

(effect of the invention)

According to the present invention, in the construction of an offshore floating body structure provided with production facilities, the design and arrangement of hull-side utility lines can be changed easily, quickly, and at low cost in accordance with the design change of the production facilities.

Drawings

Fig. 1 is a plan view showing the arrangement of production facility modules mounted on an FPSO according to the embodiment of the present invention.

Fig. 2 is a partial cross-sectional view showing the arrangement of production facilities and utility lines mounted on a hull deck centered on a center line CL.

Fig. 3 is a perspective view showing the structure of the common line of the present embodiment laid under the pipe frame.

Fig. 4 is a perspective view of a second main pipe fitting having different branch pipe lengths.

Fig. 5 is a schematic cross-sectional view of a second main pipe fitting having different branch pipe lengths.

Fig. 6 is a plan view showing a relationship between the length of the second main pipe fitting and the positions of the branch pipe connection portion and the housing.

Fig. 7 is a schematic cross-sectional view of a second main fitting of the first modification.

Fig. 8 is a schematic cross-sectional view of a second main fitting of a second modification.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a plan view showing the arrangement of a production facility module mounted on a floating production storage and offloading Facility (FPSO) according to an embodiment of the present invention, and fig. 2 is a partial cross-sectional view showing the arrangement of a production facility and a common pipeline mounted on a hull deck centered on a center line CL.

The floating production storage and offloading Facility (FPSO)10 of the present embodiment includes an oil storage tank (not shown) in a hull 12, and a plurality of production facility modules 16, which are formed by modularizing production facilities for producing petroleum and the like, are mounted on an upper deck 14 above the oil storage tank. The production facility modules 16 are arranged on both sides of the center line CL of the hull 12 on the upper deck 14, and a pipe frame 18 is arranged along the center line CL between the production facility modules 16 on both sides of the center line CL.

Inside the hull 12, utility facilities (not shown) are provided, and various utility resources (fresh water, compressed air, nitrogen, fuel oil, seawater, etc.) are supplied to the respective production facility modules 16 via the respective pipeline lines (utility lines). The common piping 20 on the hull 12 side is laid on the piping support 18A provided on the hull 12 side. The lower side of the broken line a shown in fig. 2 corresponds to the hull 12 side, and is constructed in a shipyard together with the utility equipment housed in the hull 12. The upper side of the broken line a corresponds to production facilities, and is mounted on the upper deck 14 of the hull 12 after the hull 12 is constructed, for example, in a complex yard.

As shown in fig. 2, a carrier seat (stock) 16A for mounting the production equipment module 16, a common pipe line 20 on the hull 12 side, a piping support 18A for mounting the common pipe line, and the like are installed in the shipyard on the hull 12 side. Thereafter, in the process of constructing the production facility in the integrated yard, each production facility module 16 is mounted on the carrier base 16A, and the common piping 22 of the production facility connecting each production facility module 16 and the common piping 20 on the hull 12 side is connected to the common piping 20 on the hull side.

Fig. 3 is a perspective view showing the structure of the common line 20 of the present embodiment laid on the pipe support 18A.

As shown in fig. 3, the main pipe 24 of each utility pipe 20 is laid on the pipe support 18A in the longitudinal direction of the ship. The main pipe 24 is connected to each production equipment module 16 via a branch pipe 30 branched from the main pipe 24 and a common pipe 22 of production equipment connected thereto, and supplies various common resources.

In the present embodiment, the main pipe 24 of the common line 20 is configured by joining first and second

main pipe members

26 and 28, which are two kinds of main pipe members each having a predetermined length. The first and second

main pipe fittings

26, 28 are each constituted by a pipe having a predetermined length and provided with connecting

portions

26A, 28A such as flanges at both ends, and the second main pipe fitting 28 further includes a branch pipe 30 branching off from the middle of the pipe. A connection portion 30F such as a flange is provided at the tip of the branch pipe 30. The production facility is designed to appropriately combine and connect the first main fitting 26 with the second main fitting 28 along the length of the ship to provide the main fitting 24.

In the present embodiment, the branch pipe 30 has a substantially crank shape, and after branching off vertically from the side surface of the main body of the second main pipe member 28 (branch pipe base portion 30A), it is bent in a direction perpendicular to the axial direction of the main body of the second main pipe member 28 (branch pipe horizontal portion 30B), and further bent in the same direction as the direction branching off from the main body side surface of the second main pipe member 28 (branch pipe front end portion 30C).

The second main pipe fitting 28 is attached to the center mount 180 of the pipe support 18A along the center line CL so that the branch pipe base 30A faces upward. At this time, the branch pipe horizontal portion 30B is disposed horizontally in the width direction of the hull 12, and the branch pipe distal end portion 30C is disposed so as to face upward toward the connection portion 30F. The branch pipe horizontal portion 30B is attached to the side mount 182 of the pipe support 18A so that the branch pipe front end portion 30C side thereof is maintained horizontal.

In the present embodiment, regardless of the ship length direction, the height at which the connection portion 30F of the branch pipe 30 is disposed and the position in the ship width direction are predetermined, and the lengths of the branch pipe base portion 30A and the branch pipe tip portion 30C and the length of the branch pipe horizontal portion 30B are predetermined in accordance with these heights and positions. That is, as shown by the broken line in fig. 3, by moving the position of connection to the second main pipe fitting 28 in the ship length direction, the position of the connection portion 30F of the branch pipe 30 in the ship length direction can be changed. Further, the degree of freedom of the position of the distribution point in the ship length direction can be controlled by the length of the main piping member.

That is, according to the present embodiment, in designing or constructing the production facility, it is only necessary to design or construct the connection position of the common piping 22 of the production facility in accordance with the preset height and ship width direction position, and on the other hand, when there is a design change in the production facility on the hull 12 side, it is possible to cope with this by changing the arrangement of a part of the first and second

main piping members

26 and 28 in accordance with the changed production facility.

Fig. 4 and 5 are views for explaining the configuration of the second main pipe fitting 28 in the case where a plurality of main pipes 24 are arranged in the ship width direction. Fig. 4 is a perspective view of each second main fitting 28, and fig. 5 is a schematic cross-sectional view.

Since various common resources are usually supplied to each production facility module 16, a plurality of main pipes 24 corresponding to the plurality of common resources are arranged in the ship width direction and laid on the pipe support 18A in the ship length direction. Therefore, the distance to the preset ship width direction position of the connection portion 30F differs depending on the ship width direction position of the main pipe 24. Therefore, in the present embodiment, a plurality of second main pipe fittings 28 having different lengths of the branch pipe horizontal portions 30B are prepared in advance in accordance with the distance from the connecting portion 30F where the main pipe 24 is arranged.

In addition, when the branch pipes 30 are branched at the same position with respect to the plurality of second main pipe fittings 28 arranged in parallel, the branch pipe horizontal portion 30B and the branch pipe front end portion 30C (the connection portion 30F) cannot be distributed. Therefore, in the present embodiment, the second main pipe member 28 having the branch pipe horizontal portions 30B of different lengths has different branching positions in the longitudinal direction of the branch pipe 30, thereby preventing the problem of distribution between the parallel pipes.

Fig. 4 shows an example in which 3 second main pipe fittings 28 are arranged side by side, and the second

main pipe fittings

280, 281, and 282 are shown from the second main pipe fitting 28 on the side close to the position of the preset connecting portion 30F, and the branch pipe horizontal portion 30B thereof is shown as the branch pipe

horizontal portions

300, 301, and 302. Fig. 5 (a) corresponds to a schematic cross-sectional view at the position of branch-pipe horizontal portion 300 of fig. 4, (b) of fig. 5 corresponds to a schematic cross-sectional view at the position of branch-pipe horizontal portion 301, and (c) of fig. 5 corresponds to a schematic cross-sectional view at the position of branch-pipe horizontal portion 302.

In the present embodiment, as shown in the plan view of fig. 6, the length L of the first and second

main pipe fittings

26 and 28 is set to be a multiple of the frame space length T of the hull structure, and the positions of the distribution points where the

connection portions

26A and 28A are located can be set in accordance with the frame FR. Thus, even if the dispensing point is not on the housing, the dispensing point can be changed at the same pitch as the housing space according to the configuration, and therefore, the position where the dispensing point can be arranged can be quickly determined on the arrangement diagram. In addition, it is easy to communicate the intention of the production facility side and the hull side.

As described above, according to the present embodiment, even if a design change of a production facility occurs during the construction of an FPSO, the design and arrangement of the hull-side common piping can be changed easily, quickly, and at low cost.

Next, first and second modifications of the present embodiment will be described with reference to fig. 7 and 8. Although the branch pipe 30 is provided integrally with the second main pipe fitting 28 in the present embodiment, the branch pipe may be divided into a plurality of parts (pieces) in the first and second modified examples. The branch pipe 32 of the first modification of fig. 7 is separable into 2 parts at the branch pipe base portion 32A. The two parts can be connected via a connecting portion 32F using a flange or the like. According to this configuration, in addition to the effects of the embodiment, the branch piping component located before the connection portion 32F can be eliminated until the final stage of the construction, and the change of the distribution point can be more easily coped with.

The branch pipe 34 of the second modification of fig. 8 is dividable into 3 parts at the branch pipe horizontal portion 34B. That is, the branch pipe horizontal portion 34B is separated into a portion integral with the branch pipe base portion 34A, a portion integral with the branch pipe distal end portion 34C, and a portion located therebetween and constituted only by the horizontal portion 34D, by the connecting

portions

34F, 34G. According to this configuration, in addition to the effects of the first modification, even when the main pipes are arranged in a plurality of rows, the ship width direction can be adjusted only by adjusting the length of the horizontal portion 34D of the branch pipe 34, and the other portions can be made common.

In the present embodiment and the modified examples, the flange joint is given as an example of the connection part, but the connection method of the connection part is not limited to this, and for example, a sleeve joint, a screw joint, a clamp joint, a snap joint, butt welding, or the like may be used. In the present embodiment, the branch pipe is formed in a crank shape, but the branch pipe may be formed in a shape other than the crank shape, for example, in an L shape. In this case, the branch pipe branches in the height direction from the second main pipe member, and thereafter extends in the horizontal direction. In the present embodiment, the common line is laid in the center of the hull in the ship width direction, but the common line may be laid in the longitudinal direction at a position deviated from the center line, or may be laid in a configuration divided into a plurality of pipes. In the present embodiment, the description has been given of the case where all the connection portions of the branch pipes are the same in height and position in the ship width direction at any position in the ship length direction, but there may be a connection portion having a part with a different height or a different position in the ship width direction. In the present modification, 2

connection portions

34F and 34G are provided in the horizontal portion 34D, but one or both of them may be provided in the branch pipe base portion 34A and the branch pipe distal end portion 34C, respectively.

Further, the branch pipe according to the present embodiment extends in the hull width direction after branching upward from the second main pipe fitting in the hull, but may be branched obliquely in a range of 0 ° to 45 ° with respect to the width direction instead of branching straight upward. The shape of the branch pipe connecting the branch position and the connection portion of the second main pipe fitting is not limited to the present embodiment or the modification, and the connection portion of the branch pipe connected to the production facility may be the same in height and position in the ship width direction at any position in the ship length direction.

(description of reference numerals)

10 floating production storage unloading equipment (FPSO)

12 boat hull

14 upper armor plate

16 production facility module

16A bracket holder

18 pipe frame

18A piping support

20 common line

22 common piping of production facility

24 main pipe

26 first main pipe fitting

26A connection part

28 second Main piping fitting

28A connection part

30-branch pipe

And a 30F connecting part.

Claims

1. A utility pipeline for an offshore floating structure having a production facility,

the common line includes:

a first main fitting of a given length having connection portions at both ends; and

a second main pipe fitting of a given length which branches into a branch pipe having a connection part at a front end and which has connection parts at both ends,

a plurality of main pipes which are formed by combining the first main pipe fitting and the second main pipe fitting and are connected in the ship length direction to form a common pipeline,

at least 1 connecting part of the branch piping connected with the production equipment, the height of which is the same at any position in the ship length direction and the position of which is the same in the ship width direction, is arranged.

2. The utility line of claim 1,

the main pipe is arranged in a plurality of rows in a ship width direction, and the length of the branch pipe in the ship width direction is different according to the positions of the plurality of rows so that the positions of the branch pipe in the ship width direction at the connection portion with the production facility are the same.

3. The utility line of claim 1 or 2,

the main pipe is arranged in a plurality of rows in the ship width direction, and the branching position at which the branch pipe branches from the second main pipe in the longitudinal direction differs depending on the positions of the plurality of rows.

4. The utility line of any one of claims 1 to 3,

the main pipe is laid along a center portion of the hull.

5. The utility line of any one of claims 1 to 4,

the length of the first main piping piece and the length of the second main piping piece are multiples of the length of the frame space of the hull structure.

6. The utility line of any one of claims 1 to 5,

the branch pipe is crank-shaped, and is branched in the height direction from the second main pipe member, and thereafter, extends in the horizontal direction, and the tip of the branch pipe faces in the height direction.

7. The utility line of any one of claims 1 to 5,

the branch pipe is L-shaped, branches in a height direction from the second main pipe member, and then extends in a horizontal direction.

8. The utility line of claim 6 or 7,

the branch piping can be divided into a plurality of parts.

9. The utility line of claim 8,

the split position of the branch pipe is set to a position extending in the height direction from the second main pipe fitting.

10. The utility line of claim 8 or 9,

the split position of the branch pipe is set to a position extending in the horizontal direction.

11. The utility line of any one of claims 1 to 10,

the connection of the connecting part adopts any one of a flange joint, a sleeve joint, a screwed joint, a clamping joint, a snap joint and butt welding.

12. An offshore floating body structure provided with a production facility, characterized by comprising the common piping according to any one of claims 1 to 11.

13. A method for laying a common pipeline in an offshore floating structure having a production facility,

in the common pipe-laying method described above,

a plurality of main pipes constituting a common pipeline by combining a first main pipe having a connection portion at both ends and a second main pipe having a connection portion at both ends, the first main pipe having a connection portion at a front end, the second main pipe branching into a branch pipe having a connection portion at a front end,

the position of the connection portion of the branch piping is made to be the same in both height and width directions at any position in the length direction of the ship.