KR101903844B1 - System and method for storing hydrate inhibitor in the seabed and hydrate inhibitor storage - Google Patents
System and method for storing hydrate inhibitor in the seabed and hydrate inhibitor storage Download PDFInfo
- Publication number
- KR101903844B1 KR101903844B1 KR1020160021260A KR20160021260A KR101903844B1 KR 101903844 B1 KR101903844 B1 KR 101903844B1 KR 1020160021260 A KR1020160021260 A KR 1020160021260A KR 20160021260 A KR20160021260 A KR 20160021260A KR 101903844 B1 KR101903844 B1 KR 101903844B1
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- KR
- South Korea
- Prior art keywords
- hydrate inhibitor
- hydrate
- storage tank
- rti
- inhibitor
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/78—Large containers for use in or under water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/32—Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
Abstract
A subsea hydrate inhibitor storage system and method, and a hydrate inhibitor storage device are disclosed. The undersea hydrate inhibitor storage system comprises a hydrate inhibitor storage tank installed around a seabed site where a hydrate inhibitor is desired to be injected, a pump for injecting a hydrate inhibitor stored in the hydrate inhibitor storage tank into a crude oil production pipe, An upper facility for regenerating the hydrate inhibitor by performing a regeneration process on the inhibitor and a marine facility for transferring the regenerated hydrate inhibitor from the upper facility through the transfer means and injecting the recovered hydrate inhibitor into the hydrate inhibitor storage tank . ≪ / RTI >
Description
The present invention relates to a system and a method for storing a hydrate inhibitor in deep sea crude oil production, and a storage device.
Deep sea oil such as natural gas extracted from the sea floor is easily transported and forms a hydrate due to the cold temperature. The hydrate forms a plug in the device, which is a risk factor in the production of deep sea oil. Monoethylene glycol (MEG) is used to inhibit such hydrates.
1 is a view showing the structure of a monoethylene glycol (MEG) injection device for inhibiting hydrate.
Monoethylene glycol (MEG) is generally re-injected through the regeneration process due to its high cost. Referring to FIG. 1, monoethylene glycol (MEG) is injected into the crude oil production line upstream from the MEG injection line, which is an additional line. Then, the monoethylene glycol (MEG) injected into the crude oil production pipe is recycled from the topside to the additional MEG injection line and circulated. In this way, when the monoethylene glycol (MEG) is re-injected directly from the upper equipment, the initial construction cost due to the installation of the MEG injection line is increased in proportion to the distance as the crude oil production area gradually moves away.
In addition, a high pressure pump should be installed on the topside to compensate for the pressure loss of the MEG injection piping.
Therefore, even if the crude oil production area is far from the upper equipment, it is required to economically inject the regenerated monoethylene glycol (MEG) without any restriction due to the initial construction cost.
Korean Patent Laid-Open No. 10-2012-0113688 relates to a method for calculating a monoethylene glycol injection, and describes a technique of calculating and injecting a main injection of monoethylene glycol (MEG) which inhibits the formation of hydrate.
The present invention relates to a technique for economically injecting a regenerated hydrate inhibitor (e.g., monoethylene glycol, MEG) without the constraints of the initial construction cost, even though the crude oil production area may be a very long distance away from the upper facility.
The undersea hydrate inhibitor storage system comprises a hydrate inhibitor storage tank installed around a seabed site where a hydrate inhibitor is desired to be injected, a pump injecting the hydrate inhibitor stored in the hydrate inhibitor storage tank into a crude oil production pipe, And a marine facility for transferring the hydrate inhibitor from the upper facility through the transfer means and injecting the hydrate inhibitor into the hydrate inhibitor storage tank.
According to one aspect, the marine facility may be installed on the sea surface corresponding to the hydrate inhibitor storage tank.
According to another aspect, the pump is installed in the hydrate inhibitor storage tank installed on the seabed, and the hydrate inhibitor may be extracted from the hydrate inhibitor storage tank and injected into the crude oil production pipe.
According to another aspect, the marine facility may supply power to the pump for injecting the hydrate inhibitor stored in the hydrate inhibitor storage tank into the crude oil production line.
According to another aspect, the apparatus may further include a plurality of valves located in parallel between the pump and the crude oil production pipe, and connecting the pump and the crude oil production pipe.
According to another aspect of the present invention, the hydrate inhibitor storage tank may include a separation membrane for separating a space for storing the seawater injected from the seabed and a space for storing the hydrate inhibitor injected from the sea vessel.
According to another aspect, as the hydrate inhibitor is injected into the separation membrane, the volume of the separation membrane may expand within a range in which the external sea water pressure of the hydrate inhibitor storage tank and the internal sea pressure of the hydrate inhibitor storage tank are offset.
According to another aspect of the present invention, the separation membrane may be in the form of a partition which blocks and divides the space surrounded by the inside of the hydrate inhibitor storage tank.
According to another aspect of the present invention, the marine equipment may include a heating unit for transferring the hydrate inhibitor stored in the hydrate inhibitor storage tank through the pump to reheat the heated hydrate inhibitor to the hydrate inhibitor storage tank .
According to another aspect of the present invention, the heating unit may use cooling water of a generator included in the above-described water treatment facility as a heating medium for heating the hydrate inhibitor.
The method for storing a subsea hydrate inhibitor includes the steps of injecting a hydrate inhibitor stored in a hydrate inhibitor storage tank installed in the vicinity of a seabed point where a hydrate inhibitor is injected into a crude oil production pipe, Hydrate inhibitor storage tank.
According to an aspect of the present invention, the step of injecting the hydrate inhibitor into the storage tank may include injecting the hydrate inhibitor into the hydrate inhibitor storage tank by receiving the hydrate inhibitor from a marine facility installed on the sea surface corresponding to the hydrate inhibitor storage tank.
According to another aspect, the step of injecting the hydrate inhibitor into the crude oil production piping may include supplying power for injecting the hydrate inhibitor stored in the hydrate inhibitor storage tank to the crude oil production pipe into the hydrate inhibitor storage tank Can be supplied to the pump.
A hydrate inhibitor storage device installed on the seabed to store a hydrate inhibitor includes a housing for separating the hydrate inhibitor storage device from the outside and a space for storing the hydrate inhibitor injected into the housing And a separation membrane for separating the stored space into which the seawater is injected.
According to an aspect of the present invention, as the hydrate inhibitor is injected into the separation membrane, the volume of the separation membrane may expand within a range in which the external sea water pressure of the hydrate inhibitor storage tank and the internal sea pressure of the hydrate inhibitor storage tank are canceled.
According to another aspect of the present invention, the separation membrane may be configured in the form of a partition for blocking the space between the spaces surrounded by the inside of the housing.
According to another aspect of the present invention, the separation membrane may receive a regeneration hydrate inhibitor from the marine equipments installed on the sea surface corresponding to the hydrate inhibitor storage device.
According to another aspect, the separation membrane transports the stored hydrate inhibitor to the marine facility through a pump, and the heated hydrate inhibitor may be re-injected as the transferred hydrate inhibitor is heated in the marine facility.
According to embodiments of the present invention, a storage device for storing a hydrate inhibitor (e.g., monoethylene glycol, MEG) in the seabed is provided, and a hydrate inhibitor (e.g., monoethylene glycol, MEG), it is possible to inject a hydrate inhibitor (monoethylene glycol, MEG) economically without burdening the initial construction cost even in a region where the crude oil production distance is far away.
1 is a view showing the structure of a monoethylene glycol (MEG) injection device for inhibiting hydrate.
2 is a block diagram illustrating the overall configuration of a hydrate inhibitor storage system in one embodiment of the present invention.
Figure 3 is a flow diagram illustrating the operation of injecting regenerated monoethylene glycol (MEG) using a marine facility, in one embodiment of the present invention.
FIG. 4 is a diagram illustrating a detailed structure of a hydrate
FIG. 5 is a view showing the internal structure of a hydrate inhibitor storage tank according to an embodiment of the present invention. FIG.
6 is a diagram showing another internal structure of a hydrate inhibitor storage tank in a temporal example of the present invention.
Figure 7 is a diagram provided to illustrate the operation of heating a monoethylene glycol (MEG) stored in a hydrate inhibitor storage tank, in one embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
BACKGROUND OF THE
In this specification, a marine facility may be a float of a small scale such as a floater, a platform, or the like.
In the present specification, a method of storing monoethylene glycol (MEG), which is one of the hydrate inhibitors, on the sea bed is described. However, THA (thermodynamic hydrate inhibitor), methanol Methanol), Kinetic hydrate inhibitor (KHI), Low dosage hydrate inhibitor (LDHI) and Anti-Agglomerate (AA) inhibitors.
In Figs. 2 to 7, the case of storing monoethylene glycol (MEG) as a hydrate inhibitor on the seabed will be described as an example. Accordingly, in FIGS. 2 to 7, the hydrate inhibitor storage system is represented by a monoethylene glycol (MEG) storage system, and the hydrate inhibitor storage tank is represented by an MEG storage tank.
FIG. 2 is a block diagram illustrating an overall structure of a hydrate inhibitor storage system according to an embodiment of the present invention. FIG. 3 is a graph showing the relationship between the amount of recovered monoethylene glycol (MEG) Fig. 3 is a flow chart for explaining an operation of injecting a liquid;
2, a hydrate inhibitor storage system, ie, a monoethylene
First, the MEG
In
The crude
In
In
For example, the
In
FIG. 4 is a diagram illustrating a detailed structure of a hydrate
In FIG. 4, the hydrate inhibitor storage system, that is, the monoethylene
Referring to FIG. 4, the
At this time, since the
The
At this time, a plurality of valves for controlling the injection of the monoethylene glycol (MEG) extracted from the
For example, in normal operation, the monoethylene glycol (MEG) extracted from the
Monoethylene glycol (MEG) injected into the crude
The choke valve may be a valve that serves to depressurize the pressure of the high pressure production fluid from the well and to receive it at the proper set pressure in the
The subsea safety valve is a valve installed in a position where there is no risk of hydrate formation after the valve upstream. When a serious failure occurs in the monoethylene
FIG. 5 is a view showing the internal structure of a hydrate inhibitor storage tank according to an embodiment of the present invention. FIG.
In Figures 5 and 6, the hydrate inhibitor storage tank may be represented as a MEG storage tank, a MEG storage device, a hydrate inhibitor storage device.
5, the
The
For example, the
When the
Accordingly, the
For example, the
The volume of the
As the MEG is injected into the
6 is a diagram showing another internal structure of a hydrate inhibitor storage tank in a temporal example of the present invention.
FIG. 6 shows a case where the separation membrane of the hydrate inhibitor storage tank, that is, the MEG storage tank, has a partition structure.
Referring to FIG. 6, the
Figure 7 is a diagram provided to illustrate the operation of heating a monoethylene glycol (MEG) stored in a hydrate inhibitor storage tank, in one embodiment of the present invention.
Although FIG. 7 illustrates some components required for monoethylene glycol (MEG) heating in the composition of the hydrate inhibitor storage system 400 of FIG. 4, the hydrate
7, the
The
The
At this time, even though the heated monoethylene glycol (MEG) is injected into the
The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.
Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.
Claims (18)
A pump for injecting the hydrate inhibitor stored in the hydrate inhibitor storage tank into a crude oil production pipe;
A hydrate facility for transferring the hydrate inhibitor from the upper facility through the transfer means and injecting the hydrate inhibitor into the hydrate inhibitor storage tank; And
A plurality of valves located in parallel between the pump and the crude oil production line and connecting the pump and the crude oil production line,
Lt; / RTI >
The pump includes:
A hydrate inhibitor storage tank installed in the seabed,
Wherein the hydrate inhibitor is connected to a valve for providing connection with the plurality of valves for extracting the hydrate inhibitor from the hydrate inhibitor storage tank and injecting the hydrate inhibitor into the crude oil production pipe,
The hydrate inhibitor is extracted from the hydrate inhibitor storage tank and injected into the marine equipment and connected to a valve for re-injecting the hydrate inhibitor injected into the marine equipment from the marine equipment to the hydrate inhibitor storage tank
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor storage system.
The above-
Being installed on the sea surface corresponding to the hydrate inhibitor storage tank
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor storage system.
The above-
Supplying power to the pump for injecting the hydrate inhibitor stored in the hydrate inhibitor storage tank into the crude oil production line
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor storage system.
The hydrate inhibitor storage tank may contain,
A separator for separating a space for storing the seawater injected from the seabed and a space for storing the hydrate inhibitor injected from the sea-
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor storage system.
As the hydrate inhibitor is injected into the separation membrane, the volume of the separation membrane expands within a range in which the external seawater pressure of the hydrate inhibitor storage tank and the internal sea pressure of the hydrate inhibitor storage tank are offset
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor storage system.
The separation membrane includes:
In the form of a partition for blocking the space surrounded by the inside of the hydrate inhibitor storage tank
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor storage system.
The above-
A hydrate inhibitor stored in the hydrate inhibitor storage tank is transferred through the pump to heat the hydrate inhibitor and reheats the heated hydrate inhibitor into the hydrate inhibitor storage tank,
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor storage system.
The heating unit includes:
The cooling water of a generator included in the above-mentioned water treatment facility is used as a heating medium for heating the hydrate inhibitor
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor storage system.
Transferring the hydrate inhibitor through the transfer means, and injecting the hydrate inhibitor into the hydrate inhibitor storage tank
Lt; / RTI >
The step of injecting the hydrate inhibitor into a crude oil production line comprises:
Extracting the hydrate inhibitor from the hydrate inhibitor storage tank through a pump installed in the hydrate inhibitor storage tank installed on the sea floor, and injecting the hydrate inhibitor into the crude oil production pipe;
Extracting the hydrate inhibitor from the hydrate inhibitor storage tank through the pump and injecting the hydrate inhibitor into a marine facility; And
Re-injecting the hydrate inhibitor injected into the marine equipment from the marine equipment to the hydrate inhibitor storage tank
Lt; / RTI >
The pump is located in parallel between the pump and the crude oil production line to provide a connection with a plurality of valves connecting the pump and the crude oil production line for injecting the hydrate inhibitor into the crude oil production line Connected to a valve that provides connection to the offshore installation
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor.
The step of injecting into the hydrate inhibitor storage tank comprises:
The hydrate inhibitor is supplied from the hydrate inhibitor storage tank to the hydrate inhibitor storage tank from a marine facility installed on the sea surface within a predetermined reference distance
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor.
The step of injecting the hydrate inhibitor into a crude oil production line comprises:
Supplying power for injecting the hydrate inhibitor stored in the hydrate inhibitor storage tank into the crude oil production piping to the pump installed in the hydrate inhibitor storage tank
Lt; RTI ID = 0.0 > hydrate < / RTI > inhibitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160021260A KR101903844B1 (en) | 2016-02-23 | 2016-02-23 | System and method for storing hydrate inhibitor in the seabed and hydrate inhibitor storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160021260A KR101903844B1 (en) | 2016-02-23 | 2016-02-23 | System and method for storing hydrate inhibitor in the seabed and hydrate inhibitor storage |
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| Publication Number | Publication Date |
|---|---|
| KR20170099193A KR20170099193A (en) | 2017-08-31 |
| KR101903844B1 true KR101903844B1 (en) | 2018-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020160021260A KR101903844B1 (en) | 2016-02-23 | 2016-02-23 | System and method for storing hydrate inhibitor in the seabed and hydrate inhibitor storage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2575453B (en) | 2018-07-09 | 2021-01-20 | Subsea 7 Norway As | Subsea Fluid Storage Unit |
| NO20180964A1 (en) * | 2018-07-09 | 2020-01-10 | Subsea 7 Norway As | Subsea fluid storage unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101327476B1 (en) * | 2012-10-18 | 2013-11-08 | 한국과학기술원 | Large scale subsea storage tank and method for constructing and installing the same |
| KR101422483B1 (en) * | 2012-12-21 | 2014-07-23 | 삼성중공업 주식회사 | Method for mining high viscosity oil |
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2016
- 2016-02-23 KR KR1020160021260A patent/KR101903844B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101327476B1 (en) * | 2012-10-18 | 2013-11-08 | 한국과학기술원 | Large scale subsea storage tank and method for constructing and installing the same |
| KR101422483B1 (en) * | 2012-12-21 | 2014-07-23 | 삼성중공업 주식회사 | Method for mining high viscosity oil |
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| KR20170099193A (en) | 2017-08-31 |
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