WO2011068292A1

WO2011068292A1 - Apparatus and method for carrying cables for an underwater pipeline

Info

Publication number: WO2011068292A1
Application number: PCT/KR2010/003660
Authority: WO
Inventors: 조태희
Original assignee: 프로몰엔지니어링 주식회사
Priority date: 2009-12-01
Filing date: 2010-06-08
Publication date: 2011-06-09
Also published as: KR100967308B1

Abstract

The present invention relates to an apparatus for carrying cables for an underwater pipeline, for safely laying a cable prone to suffering damage when pulled, such as an electric power cable, when laying cable during the construction of an underwater pipeline having a comparatively long boring distance, said pipeline connecting a mainland region to an island or an island to another island. According to the method of the present invention for carrying cables for an underwater pipeline, in a cable-carrying procedure of laying a cable (9) in a casing (8) using force-feeding equipment (1) to pull the cable (9) from an end hole (3) to a starting hole (2), the cable (9) is coupled to a cable-carrying apparatus (10) to be connected to the force-feeding equipment (1) to enable the pulling of the cable (9). Accordingly, the cable can be safely laid during the construction of an underwater pipeline having a comparatively long boring distance, said pipeline connecting a mainland region to an island or an island to another island, and the construction distance of an underwater pipeline can be extended.

Description

Cable Carrying Device and Method in Subsea Pipeline

The present invention relates to a cable carry device and a method of a subsea pipeline, and more particularly, when the cable is buried in a submarine pipe connecting a land and an island or an island and an island having a relatively long excavation distance, the cable is pulled together as a power cable. The present invention relates to a cable carry device and method for subsea pipelines for stably embedding a cable which may cause damage.

In general, the buried method and sheet pile method are mainly applied to the laying method of the pipeline crossing the seabed. Such a method is performed by damaging the layers and the bottom of the seabed, thus destroying the ecosystem and causing serious environmental problems. In addition, there is a problem of encountering various civil affairs issues such as compensation for fishing rights for the region and the backlash of various environmental groups.

Therefore, the inventor of the Patent Registration No. 10-0836626 "PGM method and the construction device therefor" through the directional indentation method is a non-adhesive excavation method that is recognized as excellent in reducing social cost and securing safety compared to other construction methods ( HDD method; Horizontal directional drilling method) further developed PMG method (PMG method; ProMole Grouting method} and patent application No. 10-2009-0071468 "Eco-Friendly Non-Embedded Subsea Pipeline Construction and System" for connecting land and islands or islands with relatively long excavation distances. We have proposed a technology to effectively recycle bentonite sludge when constructing a subsea pipeline.

1 to 3 are views for explaining the construction form of a general directional indentation method.

Referring to Figures 1 to 3, the directional indentation method, as shown in Figure 1, using the indentation equipment (1) while continuously connecting the hollow rod (4; Rod) while pressing the basement, but the end of the rod At the front, the small diameter drill head (5; bit) is connected and propulsed, while water and bentonite mixture is supplied and sprayed at high pressure through the hollow in the rod (4) at the starting point (2; starting port) of the work section. A pilot borehole (6) penetrates to the point of arrival (3). Then, as shown in Figure 2, after forming the tip drilling hole (6), the starting hole from the arrival hole (3) while replacing the drill head connected to the tip rod (4) with a larger diameter of the expansion air (5 ') By pulling in the direction of (2), the bentonite mixed liquid (mixed liquid such as water, bentonite, and additives) is supplied and sprayed to form an excavated hole having a desired diameter until the expanded drilling hole 6 'reaches a desired aperture. When the formation of the excavation hole is completed, as shown in FIG. 3, when pulling the final expander 5 ′, the casing 8 is pulled through the pulling eye 7 through the pulling eye 7 at the rear portion thereof. 8) will be installed, and the purpose of embedding purpose pipes such as power cables, water and sewage pipes.

However, such a directional press-fit method has a need for improvement in the purpose of embedding the buried pipe, especially the wire cable. That is, the present inventors have proposed a technique that can effectively apply the directional intrusion method over a relatively long distance, such as land and island or between islands and islands through a prior application, but until now buried in the casing like a power cable by the pulling force If it is necessary to install a cable that can cause damage, the construction distance is limited (to date, about 700m).

Therefore, the present inventors have proposed the present invention with the purpose of solving the problems caused when the subsea pipelines are buried, and at the same time reducing the environmental preservation and environmental treatment costs, construction efficiency and economics.

Accordingly, the present invention has been proposed to solve the problems of the prior art, by pulling like a power cable when laying the cable at the construction of the submarine pipe connecting the land and island or island and island with a relatively long excavation distance It is an object of the present invention to provide a new type of cable carry device and method for subsea pipelines to reliably bury a cable which may be damaged.

In addition, the present invention is a technology proposed by the present inventors through a prior application {Registered Patent Publication No. 10-0836626 "PGM method and a construction device therefor" and Patent Application No. 10-2009-0071468 "Eco-friendly non-adhesion Advantages of subsea pipeline laying method and system "} It minimizes damage to the decayed layer and stream bottom when laying undersea pipeline, so that it can effectively prevent the occurrence of environmental problems by destroying the ecosystem. It is possible to minimize environmental pollution by bentonite sludge, and to minimize the amount of bentonite sludge treated as construction waste after embedding the subsea pipeline, so that the submarine pipeline can be embedded more eco-friendly than the prior art. To maintain and reliably lay cables that may be damaged by pulling, such as power cables It is an object of the present invention to provide a cable carry device and method for subsea pipelines.

According to a feature of the present invention for achieving the above object, the present invention allows the start port (2) and the reach (3) to communicate through the excavation hole excavated to the seabed, and using the indentation equipment (1) A cable carry device in a subsea pipeline for embedding a cable (9) into a casing (8) embedded in an excavation hole, comprising: a carrying eye (20) connected and pulled to the press-fitting equipment (1); A first carrying case (40) having a front end coupled to the carrying eye (20) and having a hollow (43) opened in a rear end direction such that the front end of the cable (9) is inserted therein; A second carrying case (60) having a front end connected to the first carrying case (40) and having a hollow (63) opened at the front end and the rear end so that the cable (9) is located inside; When the cable 9 is embedded, the front end of the cable 9 is supported by the first carrying case 40, and the second carrying case 60 is continuously coupled to draw the cable 9. To be done.

According to another feature of the present invention for achieving the above object, the present invention is to install the indentation equipment (1) in the start hole (2) from the start hole (2) to the end hole (3) the excavation hole ( 6) is formed; Allowing an expansion drill hole (6 ') to be formed from the reaching hole (3) to the starting hole (2); Embedding the casing (8) from the reach opening (3) to the start opening (2) by pulling the indentation equipment (1); A cable carry step of embedding a cable (9) in the casing (8) from the reach opening (3) to the start opening (2) by pulling the indentation equipment (1); The cable carry step allows the cable 9 to be coupled to the cable carry device 10 connected to the press-fitting equipment 1 so that the cable 9 can be pulled.

According to the cable carry device and method of the subsea pipeline according to the present invention, the pull force of the indentation equipment acts on the cable carry device by using a cable carry device that is configured separately from the cable, such as a power cable that can be damaged by the pull As a result, it is possible to minimize the effect of the tensile stress on the cable to prevent damage to the cable generated when buried. Therefore, the cable can be stably buried at the time of construction as a subsea pipe connecting the land and the island or the island and the island where the excavation distance is relatively long, and the effect of increasing the construction distance of the subsea pipe can be expected. In addition, the present invention is a technology proposed by the present inventors through a prior application {Registered Patent Publication No. 10-0836626 "PGM method and a construction device therefor" and Patent Application No. 10-2009-0071468 "Eco-friendly non-adhesion It can be easily combined with submarine pipelines and systems "}, thereby minimizing damage to the layers and river floors when buried undersea pipelines, effectively preventing the occurrence of environmental problems by destroying ecosystems, Minimize the environmental pollution by bentonite sludge used in the formation of, and to minimize the amount of bentonite sludge treated as construction waste after laying the subsea pipeline, so that the submarine pipeline can be embedded more environmentally friendly than the prior art You can do it.

1 to 3 are views for explaining the construction form of a general directional indentation method;

4 is a view for explaining a cable carry device of the subsea pipeline according to the technical idea of the present invention;

5 is a flowchart for explaining a cable carry method of a subsea pipeline according to the technical idea of the present invention;

6 is a cross-sectional view showing the main part of the cable carry device of the subsea pipeline according to a preferred embodiment of the present invention;

7 is a perspective view for explaining a form of carrying a cable using a cable carry device of the subsea pipeline according to a preferred embodiment of the present invention;

8 is a view for explaining a cable carry method of the subsea pipeline according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, FIGS. 6 to 8, and like reference numerals denote like elements for performing the same functions in FIGS. 1 to 8. Meanwhile, in the drawings, detailed descriptions of the general directional indentation method and the technology easily applied by those skilled in the art will be omitted from the configuration and operation of the technology proposed by the present inventors through prior applications. In addition, although the size ratio between elements is somewhat different in the drawings of the drawings, or the size between the parts that are coupled to each other is expressed differently, the representation differences in such drawings are easily understood by those skilled in the art. The descriptions are omitted since they are possible parts.

Figure 6 is a cross-sectional view showing the main part of the cable carry device of the subsea pipeline according to a preferred embodiment of the present invention, Figure 7 illustrates a form of carrying the cable using the cable carry device of the subsea pipeline according to a preferred embodiment of the present invention. It is a perspective view for doing so.

6 and 7, the cable carry device 10 of the subsea pipeline according to the preferred embodiment of the present invention basically has a carrying eye 20, a first carrying case 40, and a second carrying case 60. 8, the start hole 2 and the reach hole 3 communicate with each other through an excavation hole excavated to the seabed, and a casing embedded in the excavation hole using the press-fitting equipment 1 ( 8) Let the cable (9) be embedded.

More specifically, in the cable carry device 10 of the subsea pipeline according to the preferred embodiment of the present invention, the first carrying case 40 and the second carrying case 60 are cut lines parallel in the pulling direction ( 43, 63, which are cut into two

bodies

42 and 62, which are divided into two parts, an

upper side

42a and 62a and a

lower side

42b and 62b. And to facilitate the disassembly. Of course, the dividing structure of the first carrying case 40 and the second carrying case 60 is most preferably divided into two, but it is possible to have a larger number of dividing structures as necessary.

At this time, the carrying eye 20 is configured to be connected to the indentation equipment 1 to be pulled, in this embodiment the carrying eye 20 is formed with a screw portion 26 to be opened to the rear end, the eye bolt 24 at the front end Is combined. Of course, such a carrying eye 20 may be configured by applying the technical idea of the present invention to a pulling eye or a swivel that are variously applied in this field.

In addition, the first carrying case 40 has a hollow 43 whose tip is coupled to the carrying eye 20 and is opened in the rear end direction so that the tip of the cable 9 is inserted therein. In the present embodiment, the first carrying case 40 is formed such that the hollow 41 is opened at the front end and the rear end at the center of the body 42 divided by the cutting line 43, and the outer side of the front end of the body 42. A front threaded portion 44 is formed around the threaded portion 26 of the carrying eye 20, and a rear threaded portion 46 is formed to open to the rear end of the body 42.

In addition, the second carrying case 60 is formed with a hollow 63 whose tip is connected to the first carrying case 40 and is opened to the front end and the rear end so that the cable 9 is located inside. In the present embodiment, the second carrying case 60 is a front threaded portion coupled to the rear threaded portion 46 of the first carrying case 40 at the outer circumference of the front end of the body 62 divided by the cutting line 63. 64 is formed, and the rear threaded portion 66 is formed to be opened to the rear end of the body 62, and the body 62 is formed to a predetermined length, as shown in FIG. 8, the first carrying case 40 To be coupled to the cable (9) while being continuously coupled in the rear direction.

In this case, the

screw parts

26, 44, 46, 64, and 66 formed to be coupled to each other in the carrying eye 20, the first carrying case 40, and the second carrying case 60 are male and female, as necessary. It will be under the spirit of the present invention in the form of differently arranged.

On the other hand, in the preferred embodiment of the present invention, the first carrying case 40 and the second carrying case 60 are separated from each other by the clamping portion 50 formed to correspond to the

cutting line

43, 63 based on the 42a and 62a and

lower sides

42b and 62b are respectively fixed. In the present exemplary embodiment, the clamping part 50 includes

grooves

52a and 52b formed in the upper and

lower sides

42a and 62a and the lower and

lower sides

42b and 62b of the first and

second carrying cases

40 and 60, respectively. It consists of a bolt 54 and a nut 56 coupled to the mounting groove 52 is made. Of course, such a clamping portion 50 is to be able to selectively apply a variety of fastening structures used for fastening in this field. The first carrying case 40 and the second carrying case 60 of the cable carry device 10 of the subsea pipeline according to the present embodiment are connected to the

upper side

42a and 62a and the

lower side

42b and 62b, respectively. After abutting the cable 9 on the side of 9), the bolt 54 is put through the hole (not shown) formed in the mounting groove 52 and fixed by the nut 56.

Referring to FIG. 8 in a state of recognizing FIG. 5, the cable carry method of a subsea pipeline according to a preferred embodiment of the present invention includes a press-fitting device 1 installed at a start port 2 to reach a start port from a start port 2. (3), the tip drilling hole 6 (see FIG. 1) is formed, and then the expansion drilling hole 6 '(see FIG. 2) is formed from the arrival hole 3 to the start hole 2. Then, the casing 8 is buried from the arrival opening 3 to the starting opening 2 by pulling the indenting equipment 1, and then the starting opening (from the reaching opening 3) is pulled by the pulling opening 1. 2) the cable carry step of embedding the cable (9) in the casing (8) proceeds, the cable carry method of the subsea pipeline according to the present embodiment, the cable (9) in the cable carry step in the press-fitting equipment (1) The cable carry device 10 to be connected is coupled to be characterized in that the pull of the cable (9) is made.

At this time, in the present embodiment, the step of forming the end drilling hole 6 and the expansion drilling hole 6 ', and embedding the casing 8 is applied to the environment-friendly non-adhesive subsea pipeline laying method proposed by the inventors through the application Since it can be made by, detailed description thereof will be omitted.

On the other hand, in the cable carry step of the cable carry method of the subsea pipeline according to the present embodiment, the method of combining the cable carry device 10 connected to the press-fitting equipment 1 with the cable 9 is, first, the power cable 9 to be embedded. The first carrying case 40 is coupled to the front end of the), and the carrying eye 20 is coupled to the front end of the first carrying case 40. As shown in FIG. 8, the carrying eye 20 is connected to the end of the rod 4 pulled by the indentation apparatus 1. At this time, the rod 4 and the carrying eye 20 may be interposed between the pulling eye or the swivel 7 as necessary. Then, while the second carrying case 60 is coupled to the outer circumferential surface of the power cable 9 released from the cable winder 100, the first carrying case 60 is coupled, and subsequently the second carrying case 60 is coupled. Pull the cable (9).

Therefore, the present invention allows the pull force of the press-fitting equipment to act on the cable carry device, so that the damage of the cable can be prevented by minimizing the influence of the tensile stress due to the cable buried land and island with a relatively long excavation distance Or it is possible to reliably bury the cable when constructing the seabed pipe connecting the island and the island, and increase the construction distance of the seabed pipe.

As described above, the cable carry device and method of the subsea pipeline according to a preferred embodiment of the present invention has been shown in accordance with the above description and drawings, but this is only an example and is within the scope without departing from the technical spirit of the present invention. It will be understood by those skilled in the art that various changes and modifications can be made in the art.

4 is a view for explaining a cable carry device of the subsea pipeline according to the technical idea of the present invention.

Referring to Figure 4, the cable carry device 10 of the subsea pipeline according to the present invention is to the pull force of the indentation equipment when the cable 9, such as a power cable that can be damaged due to the pull buried in the subsea pipeline Dispersion of tensile stress caused by the cable minimizes the effect of tensile stress on the cable to prevent damage to the cable. Therefore, the construction of the submarine pipe connecting the land and the island or the island and the island where the excavation distance is relatively long Characterized in that the cable is buried stably.

The cable carry device 10 of the subsea pipeline according to the present invention includes a carrying eye 20, a first carrying case 40, and a second carrying case 60, as shown in FIG. 8, as shown in FIG. 8. (2) and the reach (3) is to communicate through the excavation hole excavated to the seabed, and the cable (9) is embedded into the casing (8) embedded in the excavation hole using the press-fit equipment (1).

At this time, the carrying eye 20 is connected to the indentation equipment 1 and pulled. The first carrying case 40 has a hollow 43 which is open at the rear end thereof so that the front end is coupled to the carrying eye 20 and the front end of the cable 9 is inserted therein. The second carrying case 60 is formed with a hollow 63 whose tip is connected to the first carrying case 40 and is opened to the front end and the rear end so that the cable 9 is located inside.

The cable carry device 10 of the subsea pipeline according to the present invention having such a configuration allows the front end of the cable 9 to be supported by the first carrying case 40 when the cable 9 is embedded, and the second carrying case ( 60) is continuously coupled to pull the cable (9).

The cable carry device 10 of the subsea pipeline according to the present invention is provided for imparting a function of dispersing tensile stress, unlike the function of a cover that simply protects the outside of the cable 9. That is, the cable carry device 10 of the subsea pipeline according to the present invention prevents the pulling force applied from the press-fitting equipment 1 from being directly acted on the cable 9, so that tensile stress is generated in the cable 9. Try to minimize it. Therefore, although the longest buried distance of the cable that causes damage when the current cable is pulled, such as only 700m, when the cable carry device 10 of the subsea pipeline according to the present invention is expected to be possible to about 5km.

5 is a flowchart illustrating a cable carry method of a subsea pipeline according to the technical idea of the present invention.

Referring to FIG. 5, the cable carry method of the subsea pipeline according to the present invention allows the cable 9 to be coupled to the cable carry device 10 connected to the press-fitting equipment 1 after the casing is buried. It is characterized in that to proceed to the buried process of the cable (9) to be made. Of course, the cable carry method of the subsea pipeline according to the present invention, like the PGM method and the environment-friendly non-attached subsea pipeline laying method proposed by the present inventors, field investigation and design step, starting and reaching port forming step, After proceeding to the end drilling hole forming step, expansion step and the casing pooling step, the cable carry step using the cable carry device 10 of the subsea pipeline according to the present invention.

According to the cable carry device and method of the subsea pipeline according to the present invention, the pull force of the indentation equipment acts on the cable carry device by using a cable carry device that is configured separately from the cable, such as a power cable that can be damaged by the pull As a result, it is possible to minimize the effect of the tensile stress on the cable to prevent damage to the cable generated when buried. Therefore, the cable can be stably buried at the time of construction as a subsea pipe connecting the land and the island or the island and the island where the excavation distance is relatively long, and the effect of increasing the construction distance of the subsea pipe can be expected. In addition, the present invention is a technology proposed by the present inventors through a prior application {Registered Patent Publication No. 10-0836626 "PGM method and a construction device therefor" and Patent Application No. 10-2009-0071468 "Eco-friendly non-adhesion It can be easily combined with submarine pipelines and systems "}, thereby minimizing damage to the layers and river floors when buried undersea pipelines, effectively preventing the occurrence of environmental problems by destroying ecosystems, Minimize the environmental pollution by bentonite sludge used in the formation of the, and to minimize the amount of bentonite sludge to be treated as construction waste after embedding the subsea pipeline, so that the subsea pipeline can be embedded more environmentally friendly than the prior art You can do it.

Claims

The start hole (2) and the reach hole (3) are communicated through the excavation hole excavated to the seabed, and the cable (9) is embedded into the casing (8) embedded in the excavation hole using the press-fitting equipment (1) In the cable carry device of the subsea pipeline for

A carrying eye 20 connected to the indentation device 1 and pulling;

A first carrying case (40) having a front end coupled to the carrying eye (20) and having a hollow (43) opened in a rear end direction such that the front end of the cable (9) is inserted therein;

A second carrying case (60) having a front end connected to the first carrying case (40) and having a hollow (63) opened at the front end and the rear end so that the cable (9) is located inside;

When the cable 9 is embedded, the front end of the cable 9 is supported by the first carrying case 40, and the second carrying case 60 is continuously coupled to draw the cable 9. Cable carry device to the subsea pipelines to be made.
The method of claim 1,

The first carrying case 40 and the second carrying case 60 are composed of a body 42, 62 which is cut by at least two cut lines 43 and 63 which are cut in parallel in the pulling direction. , Cable carry device of the subsea pipe line, characterized in that separated from the side of the cable (9).
The method of claim 2,

The carrying eye 20 is formed with a threaded portion 26 to be opened to the rear end, the eye bolt 24 is coupled to the front end,

The first carrying case 40 is formed such that the hollow 41 is opened at the front end and the rear end at the center of the body 42 divided by the cutting line 43, and the outer side of the front end of the body 42. A front threaded portion 44 coupled to the threaded portion 26 of the carrying eye 20 is formed on the periphery, and a rear threaded portion 46 is formed to open to the rear end of the body 42.

The second carrying case 60 is a front threaded portion 64 coupled to the rear threaded portion 46 of the first carrying case 40 at the outer circumference of the front end of the body 62 divided by the cutting line 63. ) Is formed, and a rear threaded portion 66 is formed to be opened to the rear end of the body 62, and the body 62 is formed to have a predetermined length so as to be continuously in the rear direction of the first carrying case 40. Cable carry device of the subsea pipeline, characterized in that coupled to the cable (9) while being coupled.
Installing a press-fitting device (1) in the start hole (2) to form a tip drilling hole (6) from the start hole (2) to the reach hole (3);

Allowing an expansion drill hole (6 ') to be formed from the reaching hole (3) to the starting hole (2);

Embedding the casing (8) from the reach opening (3) to the start opening (2) by pulling the indentation equipment (1);

A cable carry step of embedding a cable (9) in the casing (8) from the reach opening (3) to the start opening (2) by pulling the indentation equipment (1);

The cable carry step is such that the cable 9 is coupled to the cable carry device 10 connected to the press-fitting equipment 1 so that the cable 9 is pulled out so that the cable carry of the subsea pipeline is carried out. Way.
The method of claim 4, wherein

The cable carry step is a body 42, 62 which is cut by at least two cut lines 43, 63, the first carrying case 40 and the second carrying case 60 are cut in parallel in the pulling direction. And a coupling at the side of the cable (9) when coupling to the cable (9).