KR101246076B1 - Floating mooring apparatus and method for unloading liguefied natural gas using the same - Google Patents

Floating mooring apparatus and method for unloading liguefied natural gas using the same Download PDF

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KR101246076B1
KR101246076B1 KR1020100089575A KR20100089575A KR101246076B1 KR 101246076 B1 KR101246076 B1 KR 101246076B1 KR 1020100089575 A KR1020100089575 A KR 1020100089575A KR 20100089575 A KR20100089575 A KR 20100089575A KR 101246076 B1 KR101246076 B1 KR 101246076B1
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floating
natural gas
liquefied natural
mooring
carrier
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KR1020100089575A
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Korean (ko)
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KR20120027790A (en
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송석율
정현채
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삼성중공업 주식회사
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Abstract

The present invention relates to a floating mooring device and a method for unloading liquefied natural gas using the same.
In the floating mooring apparatus according to the embodiment of the present invention, a floating structure including a storage tank for storing liquefied natural gas is moored on one side, and a carrier for transporting liquefied natural gas is mooring to the other side facing the floating structure. Floating pier; A float connected to the floating bridge and connected to a riser pipe for extracting natural gas from a gas well of a seabed; And a natural gas supply pipe extending from the floating body and connecting the riser pipe and the floating structure.

Figure R1020100089575

Description

FLOATING MOORING APPARATUS AND METHOD FOR UNLOADING LIGUEFIED NATURAL GAS USING THE SAME}

The present invention relates to a floating mooring device and a method for unloading liquefied natural gas using the same.

Natural gas may be transported in gaseous form through onshore or offshore piping, or stored in LNG carriers in the form of liquefied natural gas (LNG) and delivered to consumers. Liquefied natural gas is obtained by liquefying natural gas to about -163 ℃, the volume is reduced to about 1/600 than in the gaseous state is suitable for long distance transport over the sea.

Recently, LNG RV (Regasification Vessel), which is loaded with LNG, is operated by sea, arrives at land demand, regasifies stored liquefied natural gas, and is unloaded as natural gas. The LNG RV may be equipped with devices such as a storage tank for storing liquefied natural gas and a regasification plant for regasifying the liquefied natural gas.

In addition, demand for floating structures such as LNG Floating, Production, Storage and Offloading (FPSO) or LNG Floating Storage and Regasification Unit (FSRU) is increasing. In such a floating structure, a storage tank for storing liquefied natural gas is installed, and devices for liquefying natural gas or regasifying liquefied natural gas may be mounted as necessary. In detail, the LNG FPSO is a floating structure that liquefies the natural gas extracted from the gas well directly in the sea and stores it in the storage tank, and transfers the liquefied natural gas stored in the storage tank to the LNG carrier if necessary. LNG FSRU is a floating offshore structure that stores liquefied natural gas unloaded from LNG carriers in a storage tank at seas far from the land, and then regasifies the liquefied natural gas as needed to supply it to the demand.

As such, floating offshore structures such as LNG FPSO and LNG FSRU, which store liquid cargo such as LNG, generally have the form of a barge used while being moored by a single point mooring system such as a turret.

In addition, the floating structure may be moored with the LNG carrier to carry the liquefied natural gas stored in the storage tank of the floating structure to the LNG carrier.

However, the above conventional technology has the following problems.

In order for the floating structure to safely moore with the LNG carrier, the floating structure must be formed longer than the LNG carrier. In other words, the LNG Carrier may be formed of a smaller length than the floating structure to moor. That is, there is a problem in that the size of the LNG carrier that can be used for a particular floating structure is limited.

In particular, when an LNG carrier is used at the same time as a cargo ship using a moss type cargo hold and a cargo ship using a membrane type cargo hold, a floating structure is provided to compensate for the difference in the position of the manifold. There is a problem that it must be formed long.

Embodiments of the present invention are to provide a floating mooring device and a liquefied natural gas unloading method using the same that can be reliably unloaded liquefied natural gas by the floating structure and liquefied natural gas transport ship of various sizes.

In the floating mooring apparatus according to an aspect of the present invention, a floating structure including a storage tank for storing liquefied natural gas is moored at one side, and a carrier for transporting liquefied natural gas is at the other side facing the floating structure. Mooring floats; A float connected to the floating bridge and connected to a riser pipe for extracting natural gas from a gas well of a seabed; And a natural gas supply pipe extending from the floating body and connecting the riser pipe and the floating structure.

Floating mooring apparatus according to an embodiment of the present invention may further include a thruster which is provided on at least one of the floating bridge and the floating body, and generates a thrust for moving the floating mooring device.

Floating mooring device according to an embodiment of the present invention is characterized in that at least one or more of the floating bridge and the floating body is moored to the anchor embedded in the seabed.

In the floating mooring apparatus according to the embodiment of the present invention, the float is characterized in that the turret.

In the floating mooring apparatus according to the embodiment of the present invention, the floating bridge and the floating body are formed integrally.

Floating mooring apparatus according to an embodiment of the present invention is provided on one side of the floating bridge, the floating structure mooring line for the floating structure including a storage tank for storing the liquefied natural gas; And it is provided on the other side of the floating bridge, and may further include a mooring line for the carrier ship moored the carrier for transporting liquefied natural gas.

In the floating mooring apparatus according to the embodiment of the present invention, the floating structure mooring line and the carrier mooring line are characterized in that a plurality of installation along the longitudinal direction of the floating bridge.

Floating mooring apparatus according to an embodiment of the present invention may be provided in the floating bridge, and further includes a liquefied natural gas pipe connecting the floating structure and the liquefied natural gas carrier.

The liquefied natural gas pipe of the floating mooring apparatus according to an embodiment of the present invention, the first pipe extending in the longitudinal direction of the floating remnant bridge; A plurality of second pipes branched from the first pipe and extending in the direction of the floating structure; And a plurality of third pipes branched from the first pipe and extending in a direction of the LNG carrier, wherein the floating structure is connected to a part of the second pipe, and the LNG carrier is connected to the third pipe. It is characterized in that connected to some of the pipes.

In another aspect, the method for unloading liquefied natural gas using the floating mooring apparatus of the present invention includes: mooring a floating structure having a natural gas liquefaction facility on one side of the floating remnant of the floating mooring apparatus; Mooring a LNG carrier on the other side of the floating bridge; Connecting the floating structure and the LNG carrier; Delivering liquefied natural gas from the floating structure to the liquefied natural gas carrier; And disconnecting the floating structure from the LNG carrier.

In the method of unloading liquefied natural gas using the floating mooring apparatus of the present invention, the connecting of the floating structure and the liquefied natural gas carrier may include loading a loading arm provided on the floating structure to a manifold of the liquefied natural gas carrier. It characterized in that it comprises a step of connecting.

In the method of unloading liquefied natural gas using the floating mooring apparatus of the present invention, the connecting of the floating structure and the liquefied natural gas carrier may include connecting the liquefied natural gas pipe provided in the floating remnant and the floating structure. step; And connecting the liquefied natural gas pipe and the liquefied natural gas carrier.

The method for unloading liquefied natural gas using the floating mooring apparatus of the present invention may further include liquefying and storing the natural gas received through the floating mooring apparatus in the floating structure.

According to the floating mooring apparatus and the liquefied natural gas unloading method using the same according to the embodiment of the present invention as described above, there is an advantage that the liquefied natural gas transport ship of various sizes can be used for the liquefied natural gas unloading operation from the floating structure. .

In addition, since mooring devices such as turrets and fenders installed in the floating structure can be omitted, the space of the floating structure can be used more efficiently.

1 is a view showing a floating structure and a LNG carrier in the floating mooring apparatus according to the first embodiment of the present invention.
2 is a view showing a floating structure and a LNG carrier in the floating mooring apparatus according to the second embodiment of the present invention.
3 is a flow chart showing a process of unloading liquefied natural gas using the floating mooring apparatus of FIGS. 1 and 2.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a view showing a floating structure and a LNG carrier in the floating mooring apparatus according to the first embodiment of the present invention.

Referring to FIG. 1, the floating mooring apparatus 100 according to the first exemplary embodiment may moor the floating structure 200 and the liquefied natural gas carrier 300 at sea.

In detail, the floating mooring device 100 is connected to the floating bridge 110, the floating bridge 110, the floating structure 200 and the liquefied natural gas carrier ship 300 is mooring the gas well of the seabed Floating body 130 is connected to the riser pipe 11, the riser pipe 11 for extracting natural gas from the 10, the floating structure 200 connected to the riser pipe 11 and mooring the floating bridge 110 Natural gas supply pipe 140 for supplying natural gas may be included.

One side of the floating bridge 110 may be provided with a mooring line 111 for the floating structure for mooring the floating structure 200, the other side is a carrier for mooring the liquefied natural gas carrier 300 The mooring line 113 may be installed.

The mooring line 111 and the mooring line 113 for the floating structure, respectively, so that the floating structure 200 and the LNG carrier 300 can be moored at any position of the floating remnant bridge (110) A plurality of floating bridges 110 may be installed at regular intervals along the length direction of the floating bridge 110.

The floating bridge 110 may be formed long enough in consideration of the size of the floating structure 200 and the liquefied natural gas carrier ship 300 is mooring. For example, the floating bridge 110 may be formed to about 2 to 3 times the length of the floating structure 200.

The floating structure mooring line 111 for the floating structure 200 may be connected to the first mooring line 210, the carrier vessel mooring line 113 for the liquefied natural gas carrier ship 300 is the second It may be connected to the mooring line 310.

The floating body 130 may connect the riser pipe 11 and the natural gas supply pipe 140 to withdraw natural gas from the gas well 10. The floating body 130 may be fixedly connected to the floating bridge 110 or may be integrally formed with the floating bridge 110.

Meanwhile, at least one thruster 150 may be provided at the bottom of the floating bridge 110, and the thruster 150 may be provided at the floating bridge 110 to change the direction of thrust. It can be installed rotatably. For example, three thrusters 150 may be disposed at a vertex of a triangle at a lower end of the floating bridge 110. In addition, the thruster 150 may be provided to the floating body 130.

The floating mooring device 100 may be moved or rotated to a position where the floating structure 200 and the liquefied natural gas carrier 300 can be stably moored using the thruster 150.

In addition, the floating mooring device 100 may be mooring to an anchor 102 embedded in the seabed. The floating mooring device 100 may be provided with a chain 101 connected to the anchor 102, and the chain 101 may be provided to be adjustable in length by a winch or the like. For example, the floating mooring device 100 may be four-point mooring, in which case the chain 101 may extend radially about the floating mooring device 100.

The floating mooring device 100 may reduce the tension applied to the chain 101 by hanging the chain 101, and in this state, the thruster 150 may be used in the direction of the floating remnant bridge 110. Can be switched. In addition, it is possible to maintain the switched direction of the floating remnant bridge (110) by adjusting the length of each chain (101) to take tension.

Meanwhile, the natural gas supply pipe 140 connects the floating structure 200 and the riser pipe 11, and the floating structure 200 supplies natural gas from the natural gas supply pipe 140. Can be liquefied and stored. The natural gas supply pipe 140 may be connected to a natural gas liquefaction facility (not shown) provided in the floating structure 200.

The floating structure 200 may include not only a storage tank for storing a liquid cargo loaded in a cryogenic state, such as liquefied natural gas, but additionally, a natural gas liquefaction facility or a liquefied natural gas regasification facility. An example is LNG Floating, Production, Storage and Offloading (FPSO).

In addition, the floating structure 200 may be provided with a plurality of storage tanks for liquefying and storing natural gas, the liquefied moored to the other side of the floating remnants of the liquefied natural gas stored in the storage tank 110 It may include a loading arm 220 for delivery to the natural gas carrier 300.

The loading arm 220 is connected to a manifold (not shown) of the LNG carrier 300, and the LNG is stored in the storage tank of the floating structure 200. 300). That is, the floating structure 200 and the liquefied natural gas carrier 300 may be connected to at least one or more loading arms 220.

The other side of the floating bridge 110 is the liquefied natural gas carrier 300 is mooring. Here, the liquefied natural gas carrier 300 may be a shuttle (shuttle) for reciprocating between the port and the floating mooring apparatus (100).

The liquefied natural gas carrier 300 may be moored to the floating bridge 110 so that the manifold can be connected to the loading arm 220 of the floating structure 200.

According to the floating mooring apparatus 100 according to the embodiment of the present invention having the structure as described above, the floating structure 200 and the LNG carrier 300 can be safely connected to each other at sea, safely liquefied Natural gas can be delivered.

In detail, in the state in which the floating mooring device 100 is moored by the anchor 102, the floating structure 200 and the liquefied natural gas carrier 300 are respectively connected to the floating mooring device 100. Since the mooring, the floating structure 200 and the liquefied natural gas carrier 300 may be safely connected to the sea through the floating mooring device (100).

In addition, the floating structure 200 and the liquefied natural gas carrier 300 is not directly moored to each other, but each is moored to the floating mooring device 100, the floating bridge 110 is of a sufficiently long size Since it may be formed, the floating structure 200 and the liquefied natural gas carrier 300 may be safely connected at sea regardless of the relative size of the liquefied natural gas carrier 300.

In addition, the manifold of the liquefied natural gas carrier 300 may be moored to the floating bridge 110 by adjusting the position of the liquefied natural gas carrier 300 to be connected to the loading arm 220, Liquefied natural gas carriers having different positions of manifolds such as membrane type carriers and morse type carriers may be used to unload liquefied natural gas from the floating structure 200.

In addition, the floating structure 200 may be equipped with a separate equipment for the mooring of ships and vessels on the turret and at sea, or the conditions to be considered for mooring with the vessel from the design stage of the floating structure 200 may be omitted. This not only simplifies design and fabrication but also maximizes the storage volume of LNG.

In addition, since the floating structure 200 and the liquefied natural gas carrier 300 are delivered to the floating mooring device 100 moored by the anchor 102, the liquefied natural gas is transferred. Stability can be improved in liquefied natural gas delivery.

Hereinafter, a floating mooring apparatus according to a second embodiment of the present invention will be described with reference to FIG. 2. However, since the second embodiment has a difference in that liquefied natural gas piping is further provided as compared with the first embodiment, the difference will be mainly described, and the same reference numerals and descriptions of the first embodiment will be used.

2 is a view showing a floating structure and a liquefied natural gas carrier ship in a floating mooring apparatus according to a second embodiment of the present invention.

2, the floating bridge 110 further includes a liquefied natural gas pipe 170 that can be connected to the floating structure 200 and the liquefied natural gas carrier 300 at the same time.

The liquefied natural gas pipe 170 may be used as a conveying means for transferring the liquefied natural gas stored in the floating structure 200 to the liquefied natural gas carrier 300.

The liquefied natural gas pipe 170 branches from the first pipe 171 and the first pipe 171 extending along the longitudinal direction of the floating remnant bridge 110 and extends in the direction of the floating structure 200. A plurality of second pipes 172, which are branched from the first pipe 171, may include a plurality of third pipes 173 extending in the liquefied natural gas carrier line 300. In addition, valves (not shown) may be formed in the second and third pipes 172 and 173 to control the flow, and valves (not shown) may be provided at the first pipe 171 at predetermined intervals. Can be formed.

The loading arm 220 of the floating structure 200 is connected to the second pipe 172, and the manifold of the liquefied natural gas carrier 300 is connected to the third pipe 173. The liquefied natural gas may be delivered through the liquefied natural gas pipe 170.

In detail, when the connection between the liquefied natural gas pipe 170 and the floating structure 200 and the liquefied natural gas carrier 300 is completed, the floating structure 200 and the liquefied natural gas carrier 300 By opening only the valves of the connected second and third pipes 172 and 173 and operating the loading arm 220, the liquefied natural gas may be delivered to the liquefied natural gas carrier 300.

In addition, without installing the loading arm 220 to the floating structure 200, a manifold is installed to connect the manifold and the second pipe 172 to the liquefied natural gas carrier 300 to the liquefied natural gas Can be passed. In this case, since the liquefied natural gas can be delivered without installing the expensive loading arm 220, the cost can be reduced.

According to the floating mooring apparatus 100 according to the second embodiment of the present invention as described above, even when the liquefied natural gas carrier ship 300 is moored at any position of the floating mooring apparatus 100, It has the advantage of being able to unload natural gas.

For example, when the size of the LNG carrier 300 is large, or when the loading arm 220 of the floating structure 200 and the manifold cannot be directly connected due to the installation position of the manifold, the loading arm The liquefied natural gas may be stably unloaded by connecting the 220 and the manifold to the second pipe 172 and the third pipe 173, respectively.

Hereinafter, a method of unloading liquefied natural gas from the floating structure 200 to the liquefied natural gas carrier 300 by using the floating mooring apparatus 100 according to the embodiment of the present invention as described above.

3 is a flowchart showing a process of unloading liquefied natural gas using the floating mooring apparatus of FIGS. 1 and 2.

Referring to FIG. 3, the floating structure 200 is moored on one side of the floating mooring apparatus 100 (S300). In detail, the floating structure 200 is connected to the mooring column 111 for the floating structure by using the first mooring line 210, and can be moored on one side of the floating remnant bridge 110.

In addition, the natural gas liquefaction facility provided in the floating structure 200 and the natural gas supply pipe 140 may be connected (S302).

Thereafter, the floating structure 200 is supplied with the natural gas produced in the gas well 10 through the natural gas supply pipe 140, liquefied natural gas supplied to generate a liquefied natural gas and store it Can be stored in the tank (S304).

During the liquefaction operation of the natural gas of the floating structure 200, or during the suspension of the liquefaction operation or after the liquefaction is finished, the other side of the floating mooring apparatus 100, the liquefied natural gas carrier ship 300 is mooring It may be (S306). In detail, the liquefied natural gas carrier 300 is connected to the carrier ship mooring line 113 by using the second mooring line 310, it can be moored on the other side of the floating remnant bridge (110).

In addition, the floating structure 200 and the liquefied natural gas carrier 300 may be connected by the loading arm 220 (S308). Alternatively, it may be connected via the liquefied natural gas pipe 170 described in FIG.

In addition, the floating structure 200 drives the loading arm 220 to transfer the liquefied natural gas stored in the storage tank to the liquefied natural gas carrier 300 (S310).

When the transfer of the liquefied natural gas is completed, the connection between the floating structure 200 and the liquefied natural gas carrier 300 is released, the mooring of the liquefied natural gas carrier 300 and the floating mooring apparatus 100 Release the state (S312).

The liquefied natural gas carrier 300 may be unloaded liquefied natural gas provided after moving to another place, for example, a port.

As described above as a specific embodiment of the floating mooring device and the method for unloading liquefied natural gas using the same, the present invention is not limited thereto, and the present invention is not limited thereto. It should be construed as having the broadest range according to. Those skilled in the art can easily change the material, size, etc. of each component according to the application field, and can be combined / substituted the disclosed embodiments to implement a pattern of a timeless shape, but this also does not depart from the scope of the present invention will be. It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

10: gas well 100: floating mooring device
101: chain 102: anchor
110: floating bridge 130: floating body
111: mooring line for floating structures 113: mooring line for carriers
140: natural gas supply pipe 150: thruster
170: liquefied natural gas pipe 200: floating structure
210: first mooring line 220: loading arm
300: LNG carrier 310: second mooring line

Claims (13)

A floating bridge including a storage tank for storing liquefied natural gas on one side, and a floating ship moored on the other side opposite to the floating structure with a carrier for transporting liquefied natural gas;
A float connected to the floating bridge and connected to a riser pipe for extracting natural gas from a gas well of a seabed;
A natural gas supply pipe extending from the floating body and connecting the riser pipe and the floating structure; And
Floating mooring device provided on the floating bridge, the liquefied natural gas pipe connecting the floating structure and the liquefied natural gas carrier.
The method of claim 1,
And a thruster provided on at least one of the floating bridge and the floating body to generate thrust for moving the floating mooring device.
The method of claim 1,
At least one of the floating bridge and the floating body is mooring to an anchor buried in the seabed.
The method of claim 1,
Floating mooring device, characterized in that the float is a turret.
The method of claim 1,
The floating mooring device and the floating body is formed integrally.
The method of claim 1,
A mooring line for floating structure provided on one side of the floating bridge, the floating structure mooring including a storage tank for storing liquefied natural gas; And
Floating mooring device is provided on the other side of the floating bridge, and further includes a mooring line for the carrier ship is a mooring line for transporting liquefied natural gas.
The method according to claim 6,
Floating mooring line for the floating structure and the mooring line for the carrier ship is characterized in that a plurality of installation along the longitudinal direction of the floating bridge.
delete The method of claim 1,
The liquefied natural gas pipe,
A first pipe extending in the longitudinal direction of the floating bridge;
A plurality of second pipes branched from the first pipe and extending in the direction of the floating structure; And
A plurality of third pipes branched from the first pipe and extending in the liquefied natural gas carrier direction;
The floating structure is connected to a portion of the second pipe,
The liquefied natural gas carrier is floating mooring device, characterized in that connected to some of the third pipe.
Mooring a floating structure having a natural gas liquefaction facility on one side of the floating remnant of the floating mooring apparatus;
Mooring a LNG carrier on the other side of the floating bridge;
Connecting the liquefied natural gas pipe provided in the floating bridge and the floating structure;
Connecting the liquefied natural gas pipe and the liquefied natural gas carrier;
Delivering liquefied natural gas from the floating structure to the liquefied natural gas carrier; And
Method for unloading liquefied natural gas using the floating mooring device comprising the step of disconnecting the floating structure and the liquefied natural gas carrier. delete delete delete
KR1020100089575A 2010-09-13 2010-09-13 Floating mooring apparatus and method for unloading liguefied natural gas using the same KR101246076B1 (en)

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Cited By (1)

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US9903647B2 (en) 2013-04-12 2018-02-27 Excelerate Liquefaction Solutions, Llc Systems and methods for floating dockside liquefaction of natural gas

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Publication number Priority date Publication date Assignee Title
KR101524214B1 (en) * 2013-10-25 2015-05-29 삼성중공업 주식회사 Floating structure controlling position of offloading
CN106741645A (en) * 2016-12-19 2017-05-31 中远船务工程集团有限公司 The floating natural gas liquefaction of liquefied natural gas transport/filling ship berthing/gasification equipment

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US5501625A (en) 1992-08-24 1996-03-26 Belinsky; Sidney I. Floating terminal
US20050039665A1 (en) * 2001-12-12 2005-02-24 Single Buoy Moorings Inc Weathervaning ling offloading system
US6915753B1 (en) * 2003-03-13 2005-07-12 Bluewater Energy Services Bv Mooring apparatus
US7673577B2 (en) * 2005-03-22 2010-03-09 Single Buoy Moorings Inc. Enhanced side-by-side mooring construction

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US5501625A (en) 1992-08-24 1996-03-26 Belinsky; Sidney I. Floating terminal
US20050039665A1 (en) * 2001-12-12 2005-02-24 Single Buoy Moorings Inc Weathervaning ling offloading system
US6915753B1 (en) * 2003-03-13 2005-07-12 Bluewater Energy Services Bv Mooring apparatus
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Publication number Priority date Publication date Assignee Title
US9903647B2 (en) 2013-04-12 2018-02-27 Excelerate Liquefaction Solutions, Llc Systems and methods for floating dockside liquefaction of natural gas

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