RU2603436C1 - Floating storage of liquefied natural gas - Google Patents

Abstract

FIELD: gas industry.

SUBSTANCE: invention relates to production of liquefied natural gas on Arctic seas continental plate and can be used for accumulation, storage and distribution of liquefied natural gas (LNG). Ice-resistant ship hull (1) of floating LNG storage consists of circular inclined board with flat bottom (2), in the middle of which spherical bulge (3) is arranged. From above hull (1) is closed by deck (4) inclined to boards. In ship hull bottom (2) spherical bulge (3) through heat-insulating layer (5) cryogenic spherical reservoir (6) is installed with double walls and heat insulating vacuumed cavity between them. LNG filling and output cryogenic pipelines (7) are located inside reservoir (6) from its head (8) to lower level. Outside tank (6) pipelines (7) are located in passage (9) closed from outer side. Under deck superstructure (10) and deck (4) shaft (11) with lift and ladders is located to ice-resistant ship hull (1) flat bottom (2). On flat bottom (2) process compartments (12) are located, as well as combined power plant propulsor compartment (13).

EFFECT: enabling possibility of simplified LNG production and transportation system on Arctic seas continental plate, as well as improving its reliability.

1 cl, 5 dwg

Description

The claimed invention relates to the field of production of liquefied natural gas on the shelf of the Arctic seas (in the Far North) and can be used for accumulation, storage and delivery of liquefied natural gas (LNG) before its direct transportation by tankers to the consumer.

The prototype of the claimed invention is a "Floating drifting scientific station", containing an artificial floating platform of circular shape with sloping sides with double walls, a domed top and equipped with a propulsion system with a propulsion device allowing the device to maneuver on water according to patent for invention RU 2494001 C2 of 09/27/2013 ., IPC В63В 35/44, В63В 38/00 - [1].

The disadvantage of the prototype [1] is that it relates to floating structures, in particular to inhabited drifting scientific stations, and cannot be used for accumulation, storage and delivery of LNG to a tanker for further transportation to the consumer.

At the same time, they are known, for example:

- “An offshore platform such as an oil storage with unreasonable filling and a method for separating the upper hull structure from the floating lower module of the indicated platform” according to the patent for invention RU 2481222 C2 dated 05/10/2013, IPC B63B 35/44, B63B 21/50, B63B 22 / 02, B63B 27/3 - [2]. The platform [2] contains a floating upper hull structure having a lower end, a floating lower module having positive buoyancy and is detachably connected to the lower end of the upper hull structure, while the platform contains many anchor extensions, each of which contains a first part, detachably connected to the upper housing structure, and the second part connected to the lower module. The design of the platform provides the opportunity to withstand the sea platform ice loads in regions with severe climatic conditions.

- “Floating offshore platform” according to the patent for invention RU 2200110 C1 dated 03/10/2003, IPC B63B 35/44, B63B 39/00, EV 02B 17/00 - [3]. The floating offshore platform [3] contains a surface upper structure located on at least one vertical support column having an arbitrary-shaped hull, an arbitrary design waterline and a center of gravity located below the center of magnitude. The housing of the vertical support column in the region of the structural waterline, above and below it, contains a section with a total length equal to at least twice the significant wave amplitude of the maximum design wave of the water area, which is a body tapering upward from section to section, the outer surface of which is inclined to the vertical axis supporting columns. The value of the doubled angle of inclination to the vertical axis of the support column forming the outer surface of the body tapering upwards is 10-140 °, its surface upper structure is located on two or more vertical support columns supported by at least one underwater pontoon.

However, platforms [2] and [3] during storage of LNG are irrational in terms of heat influx from the environment due to the large specific surface of the cylindrical structure.

Also known:

- “Abramov’s complex for commercial development of natural gas fields” according to the patent for invention RU 2180305 C2 of 03/10/2002, IPC BV 35/44 - [4], and also

- “The complex of field development of natural gas deposits V. Abramov” according to the patent for invention RU 2219091 C2 dated 12/20/2003, IPC BV 35/44 - [5]. Complexes [4] and [5] relate to the complexes for commercial development of offshore and coastal gas deposits of the shelf of the Arctic seas of Russia and other regions, operating in ice, in difficult meteorological and windwave conditions and at great depths. The complex includes an offshore platform connected to the ground or an offshore floating platform for the extraction of natural gas (GHG), a chemical-technological system (GTS) of GHG preparation units, XTS of units for producing a liquid product, for example, liquefied natural gas (LNG), methanol, installed aboard a floating plant, mainly underwater, a compressor station, a storage facility with a heat exchanger for supercooling a liquid product with refrigerant and food carrier vessels for transporting liquid products the export and the domestic market. This is achieved by intensifying the development of offshore gas fields, large-scale deliveries of liquid products (LNG, methanol) with highly effective means created on the basis of modern ship technology and serial production of LNG, methanol and other products and improving working conditions, life and leisure of the complex personnel.

- “Marine floating base for production, storage and unloading, used in ice-covered and clean water (Options)” according to the patent for invention RU 2478516 C1 dated 04/10/2013, IPC BV 35/44 - [6]. Marine floating base [6], intended for use in ice-prone waters, as well as in clean waters, for the extraction, storage and transportation of oil and / or liquefied gas, containing a monolithic hull having an upper wall forming a deck, a lower wall and a polygonal configuration of the outer side walls surrounding the central opening of the well shaft, the side walls having an odd number of flat surfaces and sharp angles for cutting ice sheets, resisting ice and breaking it, and draining Yes, hummocks from this structure, ballast compartments and storage compartments located in the housing, an adjustable ballast system designed to ballast and de-ballast specified compartments for ballast and storage compartments, providing messages to the indicated base of vertical, side, keel and longitudinal-horizontal rolling for its dynamic positioning and maneuvering and operations for cutting, destroying and moving ice, and the inside of the drill shaft has a double tapering to an angular shape relative to the vertical axis, which provides water retention for the selective creation of added hydrodynamic added mass with an increase in the period of natural vibrations during side and vertical rolling, reduce dynamic amplification and resonant vibrations caused by waves and movement of the base, and facilitate the maneuver of the base.

- “Catamaran type floating LNG plant” according to the patent for invention RU 2497711 C1 dated November 10, 2013, IPC V63V 35/44, V63V 43/06 - [7], which contains the vessel’s LNG hull with the first ballast water storage tank , a floating object, spatially spaced from the LNG body of the vessel at a predetermined distance and floating on the sea surface, located at the side, adjacent to the LNG body of the vessel, the floating object has a second ballast tank for storing ballast water, the liquefaction unit is connected to one end section with hull of the LNG vessel, and rugim end portion connected to the floating object so as to rely on the LNG vessel's hull and floating object.

The known analogues [4], [5], [6] and [7] are distinguished by the complexity of the design due to drilling and production of the product (oil and / or liquefied gas), as well as the implementation of the liquefaction of natural gas produced in LNG. That is, these analogs are distinguished by multifunctionality in the technological processes being carried out: production, processing of the product, its storage and delivery to the consumer.

The objective of the proposed technical solution in comparison with the analogues [4], [5], [6] and [7] is only temporary storage of LNG during periods when LNG tankers cannot reach the gas production facility due to ice conditions or other reasons. That is, ensuring the gradual injection of LNG into a floating storage facility, the long-term storage of LNG and the delivery of LNG to the consumer, for example, to a liquefied natural gas tanker.

At the same time, tankers and gas carriers for ice navigation conditions, their refueling and unloading systems, and the use of cylindrical and spherical containers for LNG on these vessels, which may have double walls and evacuated thermal insulation between them, are known, for example:

- “A gas carrier vessel for transportation of liquefied natural gas mainly in ice conditions” according to the RF patent for invention: RU 2522201 C1 dated 07/10/2014, IPC B63V 25/08, B63B 35/08 - [8];

- “The system of production, storage and unloading of natural gas” according to the patent of the Russian Federation for invention: RU 2502628 C1 dated December 27, 2013, IPC B63B 27/25, B63B 27/34, B63B 35/44, B63B 25/12, F17D 1 / 18, B67D 9/02 - [9];

- “Tanker for liquefied natural gas with a loading and unloading system” according to the patent of the Russian Federation for invention: RU 2446981 C1 of 04/10/2012, IPC B63B 25/12, B63B 25/14, B63B 27/24, F17C 1/00 , B63B 35/00 - [10].

- “Thermal insulation of the tank for LNG transportation” according to the patent of the Russian Federation for invention: RU 2513152 C2 dated 02.27.2014, IPC B63B 25/16, F17C 3/02 - [11].

Moreover, the popularity of analogues [8], [9], [10] and [11] clearly does not imply the creation of a floating LNG storage containing an artificial floating platform of the ice class and a spherical cryogenic capacity. Moreover, the use of tankers with cryogenic tanks for the gradual accumulation of LNG is not economically viable and not practical.

Also widely known are marine objects and technical measures (methods) for passive and active protection from ice, for example, according to the book: Kulmach P.P. Offshore facilities for the development of the polar shelf. - Moscow: 26 Central Research Institute of the Ministry of Defense of the Russian Federation, 1999 .-- 336 p., Ill. 116. (p. 52 ... 65) - [12]. However, the use of these methods for a floating LNG storage facility is unknown.

The above disadvantages of the prototype and analogues set the task of creating a simple, reliable and highly efficient floating LNG storage facility that could operate in the Far North (on the shelf of the Arctic seas). In other words, the creation of an auxiliary floating LNG storage facility for the LNG plant, which can be either floating or stationary.

The essence of the technical solution lies in the fact that the LNG floating storage facility contains an artificial floating ice-resistant round platform with inclined sides and equipped with a propulsion system with a propulsion device allowing the device to maneuver on water. A floating ice-resistant platform of circular shape with inclined sides is made in the form of a round ice-resistant ship's hull with a round sloping side, with a flat bottom in the middle of which there is a spherical bulge, on top of the ship's hull is closed a deck inclined to the sides, made in the form of a washer. A cryogenic spherical tank with double walls and a heat-insulating vacuum cavity between them is installed in the spherical convexity of the bottom of the ship’s hull through a heat-insulating layer. The cryogenic spherical tank is equipped with cryogenic filling and delivery pipelines, which are located inside the tank from its head to the lower level of its inner wall, and outside the tank, cryogenic pipelines are located in the passage closed from the outside, which is additionally equipped with a ladder. The transition on the deck is docked to the deck superstructure with technological rooms, rooms for the crew and rooms for the management of the LNG floating storage. Under the deck superstructure there is a shaft with an elevator and stairs to the flat bottom of the ice-resistant ship's hull, at the bottom of which there are technological compartments, as well as a propulsion unit propeller compartment. A fence is installed around the perimeter of the deck. At least three nodes of anchor extensions are evenly spaced along the perimeter of the ice-resistant ship's hull of a round shape. The propulsion unit for the LNG floating storage facility is combined with the ability to operate on evaporated LNG.

The technical result of the claimed invention is to simplify the complex production and transportation of LNG in the Far North on the shelf of the Arctic seas, as well as to increase its reliability. The technical result is achieved by the fact that the LNG floating storage facility is much simpler, more reliable and cheaper than the LNG carriers used in the LNG production and transportation complex. The use of a floating LNG storage facility will simplify a floating or stationary LNG plant, as well as increase its safety, as the bulk of LNG will be located outside the plant. In addition, the installation of one or more of these inventive floating LNG storage facilities at the LNG plant will allow the plant to operate uninterrupted for a long time in unfavorable ice conditions in the Far North until the resumption of navigation, which, in turn, will reduce the use of expensive icebreakers for wiring gas carrier ships.

An introduction to the claim of the feature: “a circular ice-resistant floating platform with sloping sides is made in the form of a round ice-resistant ship hull with a sloping side” is necessary to create a rigid floating structure that can withstand ice loads. The round case provides the same windage when changing the direction of the wind, which improves the distribution of loads on the anchors when parking.

Introduction to the device: “a flat bottom in the middle of which there is a spherical bulge down” is necessary in order to ensure positive buoyancy and stability of the LNG storage and the necessary space for technological compartments under the deck. A spherical convexity of the bottom down is necessary for placement of a spherical cryogenic reservoir in it.

The introduction of the sign: “on top the ship’s hull is closed by a deck made in the form of a washer inclined to the sides” is necessary in order to close the volume below the deck above the atmospheric precipitation: compartments (rooms). A round central deck cutout is necessary for elevation of the upper part of the spherical cryogenic reservoir above the deck. Performing an inclined deck to the sides is necessary to independently remove precipitation in the form of rain, snow and hail overboard. In the case of ice formation, the deck inclined to the sides will facilitate the removal of this ice by the maintenance personnel. The slope of the deck can be in the range of 3 ... 15 °.

The introduction of the sign: “a cryogenic spherical tank with double walls and a heat-insulating vacuum cavity between them is installed in the spherical convexity of the bottom of the ship’s hull through the heat-insulating layer” is necessary in order to constructively minimize the design of the floating LNG storage, as well as to further reduce heat inflow from the spherical bulge of the ship’s hull to a cryogenic spherical reservoir. The use of a cryogenic spherical reservoir allows minimizing heat inflows to the stored LNG and dispensing with a single reservoir, the construction technology of which was tested during the construction of ground-based cryogenic reservoirs. The use of a heat-insulating evacuated cavity between the walls of a cryogenic spherical reservoir also helps minimize heat inflows to stored LNG. Thermal insulation can be screen-vacuum, powder-vacuum, etc. The upper part of the spherical dome of the tank protruding above the deck will significantly reduce wind loads on it, which will lead not only to a decrease in mechanical loads, but also to a decrease in heat inflows to the tank due to smoother its flow around the air masses. At the same time, the spherical shape of the protruding dome will more effectively resist wind loads when the wind rose is variable in the Far North, as well as effectively resist snow drifts on the deck by reducing the overall aerodynamic drag of the LNG floating storage. The deck inclined to the sides and the upper part of the cryogenic spherical (dome) tank protruding above the deck must be mechanically connected by brackets taking into account the thermal expansions of the deck and the reservoir, and the annular gap between them is closed from precipitation with the direction of the latter to the deck (from which precipitation falls overboard floating LNG storage).

The introduction of the sign: “the cryogenic spherical tank is equipped with cryogenic filling and delivery pipelines that are located inside the tank from its head to the lower level of its inner wall” is necessary to fill the floating storage with liquefied natural gas when loading LNG into a floating storage, as well as delivering LNG to the tanker or to the consumer during unloading. LNG unloading can be carried out using cryogenic LNG pumps or pressurization of evaporated LNG after its gasification.

The introduction of the sign: “outside the tank, cryogenic pipelines are located in the passage closed on the outside, which is additionally equipped with a ladder” is necessary in order to provide access for service personnel to the head of the spherical cryogenic tank and to prevent the influence of the external environment (snow, ice and winds) on pipelines and valves for filling and dispensing LNG.

The introduction of the sign: “the transition on the deck is docked to the deck superstructure” is also necessary to protect pipelines, shut-off and control valves, stairs and maintenance personnel from environmental influences.

The introduction of the feature: “a deck superstructure with technological (technical) rooms, with rooms for the crew and rooms for managing the LNG floating storage” is necessary, firstly, in order to place the captain’s cabin for managing the LNG floating storage during and during it anchoring and, secondly, for a possible shift by maintenance personnel (if the LNG floating storage facility is not automated). In the technical compartments (rooms) of the deck superstructure, the process of connecting - disconnecting external flexible cryogenic LNG filling-issuing pipelines can be organized.

Introduction of the sign: “under the deck superstructure there is a shaft with an elevator and stairs to the flat bottom of the ice-resistant ship’s hull, at the bottom of which there are technological compartments” is necessary in order to provide access to the propulsion unit compartment and to the technological compartments necessary for the functioning of the LNG floating storage .

The introduction of a “propulsion propulsion compartment with a propeller” is necessary to enable the LNG floating storage facility to float independently, as well as maneuver, for example, when anchoring it.

The introduction of the sign: “a fence is installed on the outer perimeter of the deck” is necessary so that crew members or maintenance personnel are protected from falling from the deck.

The introduction of the sign: “at least three nodes of anchor extensions are evenly spaced along the side of the ice-resistant ship’s round hull” is necessary in order to secure the LNG floating storage facility and to prevent its movement near the LNG plant or consumer. To fix the round ship's hull, the minimum required number of anchor extensions is three, which for uniform distribution of loads should be evenly spaced around the round hull. In the case of a larger number of anchor extensions, they should be located at angles: 3 pcs. - 120 °, 4 pcs. - 90 °, 6 pcs. - 60 °, etc.

The introduction of the sign: “the propulsion unit of the propulsion system of the LNG floating storage facility is combined with the ability to operate on evaporated LNG”, it is necessary to enable the floating floating LNG storage facility to float and ensure the operation of all its systems when the propulsion unit is operating, for example, on diesel fuel, and if there is a spherical tank LNG - on its vaporized vapor (gaseous methane).

In FIG. 1 shows a side section (Α-A) of an LNG floating storage facility. In FIG. 2 - floating LNG storage (top view). In FIG. 3 - options and precipitation of the LNG floating storage depending on its loading: a) empty (the beginning of loading of the storage); b) half loaded; c) fully loaded. In FIG. 4 is an external view of a floating LNG storage facility. In FIG. 5 is a view of a floating LNG storage on the surface of the water in the Arctic.

The LNG floating storage facility contains a round-shaped artificial ice-resistant floating platform with sloping sides, made in the form of a round ice-resistant ship hull. The ice-resistant ship hull (1) consists of a round inclined side with a flat bottom (2), in the middle of which there is a spherical bulge (3) down. The ship’s hull (1) is closed by a deck inclined to the sides (4), made in the form of a washer. In the spherical bulge (3) of the bottom (2) of the ship’s hull, a cryogenic spherical tank (6) with double walls and a heat-insulating vacuum cavity between them is installed through the heat-insulating layer (5). The floating storage is equipped with cryogenic pipelines (7) for filling and dispensing LNG, which are located inside the tank (6) from its head (8) to the lower level of its inner wall. Outside the spherical tank (6), cryogenic pipelines (7) are located in the passage (9) closed from the outside, which is additionally equipped with a ladder for maintenance personnel (not shown in the figures). The passage (9) on deck (4) is docked to the deck superstructure (10) with technological rooms, rooms for the crew and rooms for managing the LNG floating storage. Under the deck superstructure (10) (and deck (4)) there is a shaft (11) with an elevator and stairs to the flat bottom (2) of the ice-resistant ship's hull (1). On the flat bottom (2) are the technological compartments (12), as well as the compartment of the propulsion unit of the power plant (13) with a propeller (14). In technological compartments (12), for example, there may be fuel tanks (diesel) for the propulsion unit of the power plant (13), auxiliary rooms, a vacuum station for a cryogenic spherical tank (6), a battery room, etc. On the outer perimeter, the deck (4) is equipped with a fence (15), for example, in the form of a railing. The pipelines (7) for filling and dispensing LNG in the deck superstructure (10) have valves, shutoff and control valves and connectors for connecting to the pipelines of the LNG plant, tanker or other consumers (not shown in the figures). At least three nodes of anchor extensions (16) are evenly spaced along the perimeter of the ice-resistant ship’s hull (1) of a circular shape, which can be equipped with anchors and (or) other means of fixing the LNG floating storage. The propulsion unit of the power plant (13) of the LNG floating storage facility is made combined with the possibility of operating on evaporated LNG, for example, in the form of a diesel engine that can operate both on diesel fuel and on natural gas (methane).

The operation of the declared LNG floating storage facility is as follows: The LNG floating storage facility originally created at the shipyard under its own power by a temporary crew located on the deck superstructure (10) during the navigation period is delivered, for example, to the LNG floating plant (or drilling platform) located on the shelf of the northern seas with LNG production). In this case, a propeller (14) of the propulsion device of the power plant (13) is used, located on a flat bottom (2) of the ice-resistant ship's hull (1). The crew along the mine (11) can also go down below the deck (4) to the technological (technical) compartments (12) and to the propulsion system (13) to perform routine maintenance. Further, using the anchor extensions (16) located on the circular inclined side of the ship’s hull (1), anchor extensions (16) are fixedly fixed to the LNG floating storage site. The temporary crew connects the LNG floating storage facility with the LNG plant with flexible cryogenic pipelines and then prepares the floating storage facility for unattended automatic operation (or operation with a small amount: 2 ... 3 people (shift or shift)). At the same time, the railing in the form of a railing (15) does not allow people to fall from the deck inclined to the sides of the deck (4).

Liquefied natural gas from the LNG plant through the flexible cryogenic pipelines connected to the LNG floating storage facility fills the cryogenic spherical tank located in the spherical bulge (3) down through the heat-insulating layer (5). LNG through the deck superstructure (10) via cryogenic pipelines (7) laid along the passage (9) enters through the head (8) into the spherical cryogenic reservoir (6) to its bottom. As the tank (6) is filled, it is chilled to a cryogenic temperature (boiling liquid methane -162 ° С). The operation of the LNG floating storage in this mode can be carried out in automatic (unmanned) mode. In the event of any abnormal situations or for scheduled work, a shift arrives at the LNG floating storage facility (shift or temporary crew), which performs the necessary actions (work).

When the LNG floating storage facility is full, it may not be disconnected from the LNG plant, and vaporized methane vapor from the storage facility may be liquefied again. After disconnecting from the LNG production plant, vaporized methane vapors can be used to operate the propulsion system (13) or in the heating system of technological (technical) compartments (12) and deck superstructure rooms (10). When filling the LNG tanker from the LNG floating storage facility, the latter may also not be disconnected from the LNG plant, while filling the tanker is carried out through other cryogenic pipelines stretched between the LNG floating storage facility and the LNG tanker.

If necessary, in conditions of navigation, the LNG floating storage facility can sail under its own power to coastal settlements, where it can be anchored and then used as an LNG consumable storage facility for gas supply to these settlements or to fill road or railway LNG tanks for their further transportation to consumers.

Thus, the application of the proposed technical solution will greatly simplify the complex production and transportation of LNG in the Far North on the shelf of the Arctic seas. This will not only increase its reliability and safety, but also significantly reduce the cost of operation due to the exclusion of prolonged shutdown of gas carriers. The LNG floating storage facility, originally built for operation in the Far North, is simpler, more reliable and cheaper than the LNG carriers used in the LNG production and transportation complex. The application of the claimed technical solution will simplify a floating or stationary LNG plant, as well as increase its safety, since the bulk of LNG will be located outside the plant. The installation at the LNG plant of several such floating LNG storages will allow the Far North to operate uninterruptedly for a long time under adverse ice conditions until navigation resumes, which, in turn, will reduce the use of expensive icebreakers for escorting gas carriers.

A floating LNG storage facility can also be used as an LNG consumable storage facility installed during navigation at coastal settlements of the northern seas and rivers. LNG from such a floating storage facility after gasification at the floating storage facility or onshore gasifiers can be used both for gas supply to coastal settlements and as a fuel for coastal or floating gas power plants (electric heating plants).

We believe that the proposed floating storage of LNG has all the criteria of the invention:

The technical solution in conjunction with the restrictive and distinctive features of the claims is not known from the prior art and is new for the constructive solution of the claimed device, and, therefore, meets the criterion of "novelty."

The set of features of the claims - the claimed floating LNG storage - is not known at this level of technology and does not follow the well-known rules for creating such floating LNG storage, which proves compliance with the criterion of "inventive step". Namely: from the popularity of spherical cryogenic reservoirs for ground facilities and LNG tankers on which they are installed along the hull, the construction of a round floating Ice-resistant hull for accommodating one oversized oversized reservoir is not necessary. At the same time, the well-known rules for creating LNG floating storages do not follow the placement of the spherical part of the cryogenic reservoir protruding from below through the heat-insulating layer in the spherical convexity of the flat bottom of a round ice-resistant casing with inclined walls, as well as other distinctive features of the claimed device.

- the implementation of the claimed structure does not present any structural, technical and technological difficulties and is proved by the presence and production in the world industry for the production and transportation of LNG ice drifts for transporting tankers, ice-class LNG tankers, as well as spherical cryogenic reservoirs of increased size, from which the "industrial applicability".

Literature

1. RF patent for the invention: RU 2494001С2 dated 09/27/2013, IPC В63В 35/44, В63В 38/00, “Floating drifting research station” - Prototype.

2. RF patent for the invention: RU 2481222 C2 dated 05/10/2013, IPC V63V 35/44, V63V 21/50, V63V 22/02, V63V 27/3 - “Offshore platform of the type of oil storage with unreasonable filling and method for separating the top hull structures from the floating lower module of the specified platform. "

3. RF patent for the invention: RU 2200110 C1 dated 03/10/2003, IPC B63B 35/44, B63B 39/00, E02B 17/00 - “Floating offshore platform”.

4. RF patent for the invention: RU 2180305 C2 dated 03/10/2002, IPC VV 35/44 - “Abramov complex for commercial development of natural gas fields”.

5. RF patent for the invention: RU 2219091 C2 dated 12/20/2003, IPC VV 35/44 - “Field development complex for natural gas deposits of A. Abramov.”

6. RF patent for the invention: RU 2478516 C1 dated 04/10/2013, IPC BV 35/44 - “Marine floating base for production, storage and unloading, used in ice-covered and clean water (Options)”.

7. RF patent for the invention: RU 2497711 C1 dated November 10, 2013, IPC B63V 35/44, B63B 43/06 - “Floating LNG Plant of the Catamaran Type”.

8. RF patent for the invention: RU 2522201 C1 dated 07/10/2014, IPC V63V 25/08, B63B 35/08 - “A gas carrier ship for transporting liquefied natural gas mainly in ice conditions”.

9. RF patent for invention: RU 2502628 C1 dated December 27, 2013, IPC B63B 27/25, B63B 27/34, B63B 35/44, B63B 25/12, F17D 1/18, B67D 9/02 - “System production, storage and unloading of natural gas. "

10. RF patent for the invention: RU 2446981 C1 of 04/10/2012, IPC B63B 25/12, B63B 25/14, B63B 27/24, F17C 1/00, B63B 35/00 - “Tanker for liquefied natural gas with loading and unloading system. ”

11. RF patent for the invention: RU 2513152 C2 dated 02.27.2014, IPC V63V 25/16, F17C 3/02 - “Thermal insulation of the tank for LNG transportation”.

12. Kulmach P.P. Offshore facilities for the development of the polar shelf. - Moscow: 26 Central Research Institute of the Ministry of Defense of the Russian Federation, 1999 .-- 336 p., Ill. 116. (p. 52 ... 65).

Claims (1)

A floating storage facility for liquefied natural gas (LNG) containing an artificial floating ice-resistant round platform with sloping sides and equipped with a propulsion system with a propulsion device allowing maneuvering on water, characterized in that the floating ice-resistant round platform with sloping sides is made in the form of a round ice-resistant ship hull with an inclined side, a flat bottom, in the middle of which there is a spherical bulge down, on top of the ship’s hull is closed deck inclined to the sides, made in the form of a washer, a cryogenic spherical tank with double walls and a heat-insulating vacuum cavity between them is installed in the spherical convexity of the bottom of the ship’s hull through the heat-insulating layer, the cryogenic spherical tank is equipped with cryogenic filling and delivery pipelines that are located inside the tank from its head to the lower level of its internal walls, and outside the tank, cryogenic pipelines are located in a passage that is closed from the outside, which additionally is equipped with a ladder, the passage on the deck is docked to the deck superstructure with technological rooms, crew rooms and rooms for managing the LNG floating storage, under the deck superstructure there is a shaft with an elevator and stairs to the flat bottom of the ice-resistant ship’s hull, at the bottom of which there are technological compartments, as well as propulsion propulsion compartment with propeller, a fence is installed along the outer perimeter of the deck, is equal to the round perimeter of the ice-resistant ship's hull of a round shape at least three nodes of anchor extensions are measured, and the propulsion unit of the propulsion system of the LNG floating storage facility is combined with the ability to operate on evaporated LNG.

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