KR20190129480A - System and method for mooring floater using anchor - Google Patents

Abstract

The present invention provides a system and a method for mooring a floating structure using an anchor. The system for mooring a floating structure includes: at least one anchor installed on the seabed; piles inserted into the anchor to be fastened to the anchor and having the same number as the anchors or more than the anchors; and at least one supporter formed on at least one side of the floating structure and coupled to each pile. The floating structure performs heave movement along guide of the pile and the supporter.

Description

System and method for mooring floater using anchor

The present invention is directed to a system and method for mooring a floating structure using anchors.

Today, various offshore structures are being built offshore to develop marine resources such as crude oil and natural gas. Since offshore structures are floating on the sea for a long time, it is necessary to limit their movement or fix their position. For this purpose, the mooring system uses the foundation of piles, anchors, etc. This is being applied.

The basis for supporting offshore structures in mooring systems is driven piles, suction piles, drag anchors, drop anchors or torpedo anchors, depending on how they penetrate the seabed. Can be classified.

Korea Patent Registration No. 10-1410372 (Notice: 2014.06.24.)

However, during mooring using piles, piles are generally inserted and installed on the sea floor using their rigidity. However, a pile for supporting a large floater is very long, so that the pile may be buckled when inserted into the sea floor itself.

The problem to be solved in the present invention, by inserting the pile (piles) to the interior of the anchor (anchor) embedded in the seabed to fasten the anchors and piles, the supporters (supporters) formed on each side of the floating structure piles To provide a floating structure mooring system and method using an anchor in combination with the mooring the floating structure.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

One aspect of the floating structure mooring system using the anchor of the present invention for achieving the above object, at least one anchor (anchor) is installed on the sea floor; A pile inserted into the anchor and fastened to the anchor and having the same number as the anchor or having a greater number than the anchor; And at least one supporter formed on at least one side of the floating structure, wherein the floating structure is configured to perform a heavy motion according to the pile and the guide of the supporter. do.

At least one first protrusion is formed at one end of the pile, and at least one second protrusion is rotatable on an inner surface of the anchor, and the pile is based on the engagement of the first protrusion and the second protrusion. It can be inserted into the anchor.

The pile may be secured to the anchor by bolting or welding after being fastened with the anchor.

The anchor may include a body in which at least a portion of one surface thereof is opened; And a hole extending in the depth direction in the open portion of the one surface, wherein the second protrusion may be arranged in the depth direction of the hole in the hole.

The floating structure mooring system further includes a fixing member for fixing the second protrusion on the inner surface of the anchor, wherein the fixing member is engaged with the second protrusion after the pile is engaged with the anchor. Can prevent the rotation.

The pile may be recycled by being separated from the anchor when the fixing member is separated from the second protrusion and the coupling of the fixing member and the second protrusion is released.

One aspect of the floating structure mooring method using the anchor of the present invention for achieving the above object, the step of installing at least one anchor on the sea floor; Fastening the file and the anchor by inserting a file having the same number as the anchor or having a larger number than the anchor into the anchor; And coupling at least one supporter formed on at least one side of the floating structure with each pile, and coupling the floating structure to perform a heave motion according to the guide of the pile and the supporter.

Specific details of other embodiments are included in the detailed description and the drawings.

The present invention can obtain the following effects through the configuration for solving the above problems.

First, the piles are inserted into the anchors embedded in the seabed to fasten the anchors and piles, and the supporters formed on each side of the floating structure are joined with the piles to moor the floating structure, thereby preventing the pile from buckling. can do.

Second, by preventing the pile from buckling, even large plotters can be efficiently moored.

1 is a conceptual diagram of a floating structure mooring system according to an embodiment of the present invention.
2 is a flowchart illustrating a floating structure mooring method according to an embodiment of the present invention.
3 is an exemplary view for explaining a method of fixing a file to an anchor according to a first embodiment of the present invention.
4 is an exemplary view for explaining a method of fixing a file to an anchor according to a second embodiment of the present invention.
5 is an exemplary view for explaining a method of fixing a file to an anchor according to a third embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

When elements or layers are referred to as "on" or "on" of another element or layer, intervening other elements or layers as well as intervening another layer or element in between It includes everything. On the other hand, when a device is referred to as "directly on" or "directly on" indicates that no device or layer is intervened in the middle.

The spatially relative terms " below ", " beneath ", " lower ", " above ", " upper " It may be used to easily describe the correlation of a device or components with other devices or components. Spatially relative terms are to be understood as including terms in different directions of the device in use or operation in addition to the directions shown in the figures. For example, when flipping a device shown in the figure, a device described as "below" or "beneath" of another device may be placed "above" of another device. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can also be oriented in other directions, so that spatially relative terms can be interpreted according to orientation.

Although the first, second, etc. are used to describe various elements, components and / or sections, these elements, components and / or sections are of course not limited by these terms. These terms are only used to distinguish one element, component or section from another element, component or section. Therefore, the first device, the first component, or the first section mentioned below may be a second device, a second component, or a second section within the technical spirit of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, operations and / or elements. Or does not exclude additions.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in describing the present invention with reference to the accompanying drawings, the same or corresponding elements are denoted by the same reference numerals, and the same reference numerals will be used. The description will be omitted.

Floating structures, such as Floating Storage Regasification Units (FSRUs), which are installed in deep waters, are not moored and maintained by jetty or dolphin. However, these mooring methods do not significantly restrain the movement of the floater, so if a typhoon occurs, the mooring line must be removed and the floater evacuated. As one of methods for solving such a problem, file mooring may be applied.

1 is a conceptual diagram of a floating structure mooring system according to an embodiment of the present invention.

Referring to FIG. 1, a float mooring floater 110 according to an embodiment of the present invention is moored using pile mooring. In the case of pile mooring, when the piles 120 are inserted into the seabed 130, each of the floating structures 110 is supported by supporters 140 formed on the side of the floating structure 110. Secure the side to the piles 120. The supporter 140 does not restrain the vertical movement (ex. Heve) of the floating structure 110 with respect to the piles 120, but the horizontal movement (ex. Surge) of the floating structure 110 is performed. surge, sway). Therefore, it is necessary to reduce the load generated in the supporter 140.

However, since the pile 120 is very long to support the floating structure 110 when the floating structure 110 is large, the pile may be buckled when a large load is applied to a specific pile. Therefore, in the case of pile mooring, an appropriate method for installing the pile 120 on the bottom surface 130 is required.

The present embodiment is proposed for this purpose, and relates to a method for facilitating installation of pile mooring by installing a separate anchor 150 on the sea bottom 130.

2 is a flowchart illustrating a floating structure mooring method according to an embodiment of the present invention. The following description refers to FIGS. 1 and 2.

In this embodiment, the floating structure mooring system for mooring the floating structure 110 is installed at sea in the following order.

First, the anchor 150 is installed on the sea bottom surface 130 (S210).

The anchor 150 is formed to be embedded in the seabed surface 130, and may be formed by being inserted into a rock layer or the like so as not to be easily separated from the seabed surface 130, or embedded in the ground of the seabed.

In addition, the anchor 150 may be formed such that the width of the lower portion is wider than the width of the upper portion so as not to be easily separated from the bottom surface 130. For example, the anchor 150 may be formed in the form of a triangle (△), arrow (↓), a fed hat.

When the anchor 150 is installed on the sea bottom surface 130 (S210), after the file 120 is inserted into the anchor 150, the file 120 is fastened to the anchor 150 (S220).

In this embodiment, after the file 120 and the anchor 150 are fastened, the file 120 may be fixed to the anchor 150 by using a method such as bolting and bonding. 3 is an exemplary view for explaining a method of fixing a file to an anchor according to a first embodiment of the present invention, Figure 4 is a view for explaining a method for fixing a file to an anchor according to a second embodiment of the present invention It is an illustration.

3 illustrates an example in which the file 120 is fixed to the anchor 150 using the bolting 310. When the pile 120 is inserted into the anchor 150 and then the pile 120 is fastened to the anchor 150, the first hole formed at the upper one side of the anchor 150 and the other upper portion of the anchor 150. The bolt is formed to be coupled to the nut through the anchor 150 and the pile 120 through the second hole and the like formed in the. In this embodiment, the binding force between the pile 120 and the anchor 150 may be increased by using the bolting 310.

4 illustrates an example in which the pile 120 is fixed to the anchor 150 using the joint 320. When the pile 120 is inserted into the anchor 150 and then the pile 120 is fastened to the anchor 150, a portion of the pile 150 contacting the pile 120 from the upper side of the anchor 150 may be welded. Joining by the method. As in the case of the bolting 310, in this embodiment, the bonding force between the pile 120 and the anchor 150 may be increased by using the joint 320.

This will be described with reference to FIGS. 1 and 2 again.

When the pile 120 is fastened to the anchor 150 (S220), the supporters 140 formed on the side of the floating structure 110 are coupled with the piles 120 to moor the floating structure 110. Let (S230). The floating structure 110 may be installed at sea according to this method, and may perform a heavy motion according to the guides of the piles 120 and the supporters 140.

The supporter 140 for coupling with the pile 120 is formed on the side of the floating structure 110. In this embodiment, it is preferable that the supporter 140 is formed on each side of the floating structure 110 so as to support the floating structure 110 using the plurality of piles 120. In this case, the supporter 140 may be combined with the piles 120 located on each side of the floating structure 110 to improve the bearing capacity for the floating structure 110.

In addition, in the present embodiment, a plurality of supporters 140 coupled to one pile 120 are provided on the side of the floating structure 110 so that each pile 120 may increase a bearing capacity for the floating structure 110. It is also possible to be formed in. In this case, the plurality of supporters 140 may be formed in a vertical direction at a predetermined interval.

When the floating structure mooring system is installed at sea according to the method proposed in FIG. 2, the reaction force is prevented from buckling because no reaction force is generated from the sea bottom 130 with respect to the insertion force of the pile 120. Can be obtained.

Meanwhile, in the present embodiment, the floating structure 110 is positioned on the sea, and then the pile 120 is lowered from the waterline in the seafloor direction and inserted into the anchor 150 to moor the floating structure 110. It is also possible. In addition, in the present embodiment, after the anchor 150 is coupled to one end of the pile 120, the pile 120 may be embedded in the sea bottom 130 to moor the floating structure 110.

On the other hand, when the pile 120 is bonded to the anchor 150, it is impossible to recycle the pile 120. In the present embodiment, in consideration of the recycling of the file 120, jagged protrusions are formed at one end of the file 120 inserted into the anchor 150, and the inner surface of the anchor 150 into which the file 120 is inserted. It is also possible to form gears that engage these protrusions. This will be described in detail below.

5 is an exemplary view for explaining a method of fixing a file to an anchor according to a third embodiment of the present invention.

Referring to FIG. 5, in order to install the floating structure mooring system at sea, one end 410 of the pile 120 is inserted into the inner surface 430 of the anchor 150 installed at the sea bottom 130. .

The first protrusions 420a, 420b,..., 420n of the sawtooth shape are formed at one end 410 of the pile 120. The first protrusions 420a, 420b,..., 420n may be arranged in one direction. In the present exemplary embodiment, the first protrusions 420a, 420b,..., 420n may be formed along one end portion 410 of the pile 120. However, the present exemplary embodiment is not limited thereto, and the first protrusions 420a, 420b,..., 420n may be formed in two lines on both sides of the one end 410 of the pile 120.

The second protrusions 440a, 440b,..., 440n in the form of gears are formed on both sides of the inner surface 430 of the anchor 150. These second protrusions 440a, 440b,..., 440n are rotatable and are formed to be arranged in one direction (eg, from inside to outside) like the first protrusions 420a, 420b,..., 420n. For example, the file 120 may be formed at a predetermined interval so that the pile 120 may be engaged with the first protrusions 420a, 420b, ..., 420n in a one-to-one correspondence when inserted into the anchor 150. .

Meanwhile, in the present exemplary embodiment, the second protrusions 440a, 440b,..., 440n are not limited to those formed at both sides of the inner surface 430 of the anchor 150. For example, the second protrusions 440a, 440b,..., 440n may be formed along a circumference of the inner surface 430 of the anchor 150.

When the pile 120 is inserted into the inner surface 430 of the anchor 150, the second protrusions 440a, 440b,..., 440n and the pile 120 formed on the inner surface 430 of the anchor 150 are inserted. The file 120 may be fixed to the anchor 150 through binding between the first protrusions 420a, 420b,..., 420n formed at one end 410.

However, when an external pressure (eg, a tidal wave) is applied to the pile 120 inserted into the anchor 150 in the horizontal direction of the sea level, the second protrusions 440a, 440b,..., 440n rotate so that the anchor 150 is rotated. And the binding force between the pile 120 may be weakened.

In this embodiment, in consideration of this point, the fixing to fix the movement of the second protrusion 440n which is located outward from the inner surface 430 of the anchor 150 among the second protrusions 440a, 440b, ..., 440n. The member 450 may be provided.

The fixing member 450 has a pin shape and is formed outside the inner surface 430 of the anchor 150. In the present embodiment, when the insertion of the file 120 into the anchor 150 is completed, by using the fixing member 450 to fix the movement of the second protrusion 440n located outside, the anchor 150 and The binding force between the pile 120 can be strengthened.

The fixing member 450 is provided around each second protrusion to control the movement of all the second protrusions 440a, 440b,..., 440n formed on the inner surface 430 of the anchor 150. It is also possible. However, in consideration of aspects such as cost reduction, the fixing member 450 is provided around the second protrusions one by one so as to control the movement of the second protrusions located outside the inner surface 430 of the anchor 150. It is desirable to be.

On the other hand, when the file 120 is to be dismantled from the anchor 150, after the fixing member 450 is removed, the file 120 may be lifted to separate the file 120 from the anchor 150. In this embodiment, it is also possible to obtain the effect that it is possible to recycle the file 120.

Meanwhile, in the present exemplary embodiment, after fixing the second protrusions 440a, 440b,..., 440n formed on the inner surface 430 of the anchor 150 by using the fixing member 450, the second protrusions 440a, 440b,. It is also possible to further strengthen the binding force between the anchor 150 and the pile 120 using methods such as bolting and joining.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

110: floating structure 120: pile
140: supporter 150: anchor
410: one end of the file 420a, 420b,... 420n: first projections
430: inner surfaces 440a, 440b,. 440n: second projections
450: fixed member

Claims (7)

At least one anchor installed on the sea bottom;
A pile inserted into the anchor and fastened to the anchor, the pile having the same number as the anchor or having a larger number than the anchor; And
At least one supporter, which is formed on at least one side of the floating structure and engages with each pile
Including;
The floating structure mooring system using the anchor, the structure is in a heavy motion (heave motion) according to the guide of the pile and the supporter. The method of claim 1,
At least one first protrusion is formed at one end of the pile,
At least one rotatable second protrusion is formed on an inner surface of the anchor,
And the pile is inserted into the anchor based on the engagement of the first and second protrusions. The method according to claim 1 or 2,
And the pile is secured to the anchor using bolting or welding after being engaged with the anchor. The method of claim 2,
The anchor,
A body in which at least part of one side is opened; And
A hole extending in the depth direction from the open portion of the one surface
Including;
And the second protrusion is arranged in the hole in the depth direction of the hole. The method of claim 2,
Fixing member for fixing the second projection on the inner surface of the anchor
More,
And the fixing member engages with the second protrusion after the pile is engaged with the anchor to prevent rotation of the second protrusion. The method of claim 5,
And the pile separates the fixing member from the second protrusion and separates and reuses the anchoring member and the second protrusion when the fixing member is released from the anchor. Installing at least one anchor on the sea bottom;
Fastening the file and the anchor by inserting a file having the same number as the anchor or having a greater number than the anchor into the anchor; And
Coupling at least one supporter formed on at least one side of the floating structure with each pile, and coupling the floating structure to perform a heave motion along the guide of the pile and the supporter;
It comprises a, floating structure mooring method using the anchor.

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