JPS60192184A - Submarine pipeline - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a submarine pipeline, and particularly to a submarine pipeline structure that requires a communication submarine cable to be attached thereto.

Submarine pipelines are used in a variety of applications, such as between offshore oil drilling rigs and crude oil accumulation stations, and as water supply pipes across straits. Pipelines connecting offshore oil field drilling rigs (offshore rigs) and onshore stations are particularly important, and offshore rigs are connected like a web in Belja Bay, North Sea oil field areas, etc. On the other hand, these offshore rigs exchange data with land stations, etc. via telephone, fax, etc. through communication lines in a timely manner, and offshore rigs are connected to land stations, etc. using two lifelines: pipelines and communication lines. . Conventionally, communication lines have mainly been based on radio systems such as wireless telephones, line-of-sight/outside micro communications, and satellite communications, and very rarely have they been based on wired technology such as submarine cables. This is for the operation of offshore rigs.

Communication lines are extremely important and failures are extremely common.
Submarine cables are susceptible to breakage from anchors, especially in areas where many small and medium-sized supply boats come and go, such as in offshore oil field areas, and furthermore, if they are cut, it will take time to repair them, etc. This is because it is believed that there are problems with reliability.

However, in wireless communication lines, whether for radio telephones or microwave communications, there is a limit to the frequencies that can be used, and it is reported that it is already impossible to allocate frequencies in the aforementioned offshore oil field areas. Furthermore, wireless communication has a unique fading phenomenon, and stable communication is not necessarily guaranteed. On the other hand, it is clear that the submarine cable system, which uses submarine coaxial cables, submarine optical fiber cables, etc., eliminates all the disadvantages of such wireless communication methods and can provide ideal communication quality. Methods such as laying the cable on the surface or burying it under the seabed do not provide sufficient protection for the cable, and the possibility of damage from ship anchors cannot be ruled out.

The purpose of the present invention is to eliminate the shortcomings of submarine cable protection mentioned above, protect submarine cables of high quality from ships' anchors, etc., and protect submarine cables with the same level of safety as submarine pipelines themselves. The objective is to provide a subsea pipeline structure that can be used.

In order to achieve this object, a cable support member is attached to the outer side of a pipe for a submarine pipeline, and a submarine cable is supported by the cable support member. That is, the undersea hype line structure according to the invention forms a cable guide row outside the submarine pipeline (-1) and fixes or semi-fixes the submarine cable to the pipeline by passing it through this guide row.The submarine pipeline itself Since pipelines are usually placed under strict protection and monitoring, the pipeline itself is unlikely to be damaged.Therefore, submarine cables fixed to pipeline pipes are also subject to the same degree of damage as the pipeline itself. As mentioned above, the gist of the present invention is to lay a submarine cable along a pipeline and to hold it by the pipeline. An annular cable support member is attached in advance to the outer surface of the cable support member, and the submarine cable is supported by this support member, or the cable support member is formed of a ferromagnetic material, and the support member is magnetized and its magnetic attraction force is used to support the submarine cable. A member is fixed to the outer surface of a pipeline pipe to support a submarine cable.The former case is mainly suitable for use when constructing a new pipeline, while the latter is suitable for use when constructing a new pipeline or an existing pipeline. suitable for later installation of submarine cables.

Hereinafter, the present invention will be described by way of example with reference to FIG. IIIT.

FIG. 1 is a partial enlarged cross-sectional view of a pipe 1 of a submarine pipeline according to an embodiment of the present invention, and FIG. 2 is a partial side view of a pipe 10 according to the present invention. The pipe 1 for the submarine pipeline is usually composed of a seamless steel pipe with a diameter of several tens of centimeters.

A plurality of annular cable support fittings 2 are fixed to the outer 111 surface of this pipe 1 at appropriate intervals along the length direction of the pipe by means such as welding. A submarine cable 3 such as a cable or a submarine optical fiber cable is inserted. In this embodiment, as shown in an enlarged view in FIG. 1, the annular cable support fitting 2 has a half-split structure that opens with a hinge to facilitate cable installation. Close the upper half of the support bracket and secure with screws.

FIGS. 3 and 4 are diagrams showing the construction state in which a submarine cable is attached to a submarine pipeline pipe and laid on the ocean floor by applying the present invention. The embodiment shown in FIG. 3 is an example in which a submarine cable is laid at the same time as a submarine pipeline is laid, and a drum 5 on which a submarine cable 3 is wound is installed on a pipeline laying ship 4 or a purge, and As the pipes 1 for the pipeline above are connected one after another and sent out to the seabed, the submarine cable 3 is attached to the cable support fitting 2 fixed to the pipe 1, and the pipeline is laid on the seabed. Cable installation will be carried out at the same time. In the example shown in FIG. 4, only a pipeline pipe 1 is laid in advance on the seabed, and a submarine cable 3 is later attached to the pipe 1 along the submarine line using a diameter cutter 9. As shown in the figure, the submarine cable 3 is supplied from a cable drum (capstan) 5 on a bar 26 towed by a tug board 7VC, lowered into the sea by a caterpillar engine 8 for feeding out the cable, and then transferred to a submarine vibrator by a dipper 9. It is attached and fixed to the cable support fitting 2 of the line knob 1.

FIG. 5 shows a cable support fitting 1 according to another embodiment of the present invention.
FIG. The cable support fitting 10 is made of nickel.
It is made of a ferromagnetic material such as cobalt alloy steel, and its shape is curved in the pipe circumferential direction with a curvature such that the bottom surface 10a is in close contact with the outer surface of the submarine pipe.
Also, in the center of the bottom surface 10a, there is a concave groove 1 extending in the axial direction of the vibrator.
0b is formed. This concave cable support fitting 10
is magnetized and is attracted to the outer peripheral surface of the pipeline pipe by its magnetic attraction force, and the submarine cable 3 is inserted into the bottom groove 10b of the support fitting 10 along the pipe.
is inserted and fixed to the pipe. In this embodiment, it is possible to fix the submarine cable to an existing submarine pipeline that does not have a cable support fitting on the pipeline itself. In the case of this magnetization support metal fitting, there is no need to process the pipe itself during installation.
It avoids an increase in the cost of pipes, simplifies the installation work, and has many advantages, although its reliability is slightly lower than that of cable supports fixed to the pipe itself, and it is easy to install. It can be applied to both the cases of FIG. 3 and FIG. 4. In addition, in the above explanation, FIGS. 1 and 5
It goes without saying that the shape of the cable support fittings shown in the figure should be determined appropriately depending on the shape and weight of the submarine cable used, the outer diameter of the pipeline pipe, etc. Alternatively, in the case of FIG. 5, only the attracting surface may be partially made of a plastic material with a ferromagnetic material.

As described above, according to the present invention, it is possible to attach a submarine cable along the outer surface of a submarine pipeline pipe, regardless of whether it is newly constructed or an existing one, and is particularly suitable for offshore rigs for drilling submarine oil fields. Extremely reliable communication lines can be easily obtained.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged cross-sectional view of a seabed/quiveline according to an embodiment of the present invention, FIG. 2 is a partial side view of the embodiment shown in FIG. 1, and FIGS. 3 and 4 are a schematic diagram showing an example of laying a submarine pipeline according to the present invention, and
FIG. 5 is a perspective view of a submarine cable support member according to another embodiment of the present invention. 1... Pipes for submarine pipelines, 2.10... Cable support fittings. 3... Submarine cable, 4... Pipeline laying ship, 6... Purge, 9...
... Diaper, 10b... Concave groove. Agent Patent Attorney Rikichi Someyo Figure 1

Claims (3)

[Claims] (1) A submarine pipeline, characterized in that a submarine cable is attached to the outside of the pipeline along the pipe and via a cable support member. (2) The cable support member is a plurality of annular members attached to the outer side of the submarine pipeline pipe, and the submarine cable is inserted through the annular members. An undersea pipeline according to claim 1. (3) The cable support member is a concave magnetized metal member that is attracted to the outer part of the submarine pipeline pipe, and the cable support member is a concave magnetized metal member that is attracted to the outer part of the submarine pipeline pipe and the concave magnetized metal member. 2. The submarine pipeline according to claim 1, wherein the submarine cable is inserted through the gap.