• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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  • 优先权
    • 专利摘要:
    floating LNG plant comprising a first and second converted LNG carrier and a method of obtaining the floating LNG plant. The present invention relates to a floating LNG plant comprising a first and a second converted LNG carrier, each provided with a hull and at least one LNG storage tank, wherein the floating LNG plant further comprises : - a connecting structure to connect the hull of the first and second converted LNG carrier to obtain a double hull vessel, - process equipment for LNG processing in the floating LNG plant, and - an anchorage system for to anchor the floating LNG plant to the seabed, each of the at least first and second converted LNG carriers comprising an LNG carrier originally provided with a plurality of LNG tanks, wherein at least one LNG tank has been disabled and/or removed from at least one LNG conveyor to create space in the floating LNG plant to install LNG processing process equipment.
    公开号:BR112014026125B1
    申请号:R112014026125-3
    申请日:2013-04-19
    公开日:2021-08-10
    发明作者:Willem Cornelis Van Wijngaarden；Theodorus Johannes Bernardus Brinkel
    申请人:Single Buoy Moorings Inc；
    IPC主号:
    专利说明:

    [001] The invention relates to a floating LNG plant comprising a first and a second converted LNG carrier each provided with a hull and at least one LNG storage tank, wherein the floating LNG plant comprises , in addition, a connecting structure to connect the hull of the converted first and second LNG carrier in order to obtain a catamaran-type vessel or so-called "double hull", process equipment for LNG processing at the plant LNG plant, and a mooring system to anchor the floating LNG plant to the seabed.
    [002]The floating LNG plant according to the present invention is specifically suited to be used as a floating LNG production, storage and offloading unit (LNG FPSO).
    [003] An FPSO is a floating vessel used in the oil industry for the processing and storage of hydrocarbons, such as oil and gas. An FPSO vessel is designed to receive hydrocarbons produced from a nearby power plant or subsea gauge. The vessel is adapted to process hydrocarbons on board, to store the hydrocarbons until the hydrocarbons can be transferred to a tanker or transported towards an onshore installation via a pipeline.
    [004] An FPSO can be built specifically for its definitive application (construction of new FPSO). Alternatively, an FPSO can be obtained by converting an existing vessel. The advantage of such an FPSO obtained through conversion is that the use of an existing structure reduces design risks due to the fact that the existing vessel is easily available and the construction of the hull of the complete vessel is not on the critical path . In addition, project schedules can be reduced to the delivery time for the sides only. Additionally, the overall scale of the project and the related costs for obtaining the FPSO are significantly reduced compared to the scale and costs of newly built FPSOs.
    [005] In the prior art, several solutions have been described to convert existing vessels in order to obtain an FPSO.
    [006] The international patent application WO2010059059 exposes a device for the floating production of LNG and a method to convert an LNG-carrier to a floating device for the production of LNG. According to WO2010059059 the existing LNG carrier is provided with an additional designed hull structure which is fixed to the outside of the vessel's hull. Once the designed hull structure is provided, the equipment for the production of LNG is arranged in this designed hull structure. This means that, according to WO2010059059, the additional internal space created by the addition of the designed hull structure is used to contain at least part of the equipment for the gas liquefaction process.
    [007] An important disadvantage of the solution according to WO2010059059 lies in the fact that the gas process equipment is contained in an enclosed space, which can potentially lead to very dangerous situations because of the risk of an explosion in a space closed due to gas leakage from the gas process equipment. The solution according to WO2010059059 will increase the volume of space available for the process equipment. However, the additional structure provided does not increase the weight-carrying capacity or stability of the vessel.
    [008] Another disadvantage is linked to the fact that according to the solution of WO2010059059 the gas liquefaction process equipment is installed in the space created on the side of the hull, which leads to a dangerous configuration in view of possible side collisions, with , for example, a transport tanker. And side collisions will completely damage the gas process equipment in the projecting hull structures. Summary of the Invention
    [009] The present invention relates to a floating LNG plant comprising a first and a second converted LNG carrier, each provided with a hull and at least one LNG storage tank, in which the floating LNG plant it further comprises: - a connecting structure for connecting the hull of the converted first and second LNG carrier to obtain a double hull vessel, - process equipment for LNG processing in the floating LNG plant, and- an mooring system for anchoring the floating LNG plant to the seabed, wherein each of the at least first and second converted LNG carrier comprises an LNG carrier originally provided with a plurality of LNG tanks, wherein at least one LNG tank has been decommissioned and/or removed from at least one LNG carrier to create space in the floating LNG plant to install process equipment for LNG processing.
    [0010] In this text, the phrase "LNG carrier" is used. This means a vessel that was originally built to transport LNG. Noteste, the terminology ''converted LNG carrier'' refers to an LNG carrier that was originally built to be used for the transport of LNG but has been modified to change the vessel's usage. to an “original LNG carrier”. This reference is made to the LNG carrier prior to the LNG carrier conversion.
    [0011]The floating LNG plant according to the invention is obtained by connecting at least a first and a second converted LNG carrier by means of a connecting structure. The LNG carrier used can comprise any type of LNG carrier, such as a Moss type LNG carrier, i.e. spherical, Membrane type, SPB, or any other types of tanks used for the storage of LNG.
    [0012] The result of connecting a converted first and second LNG carrier is that the resulting vessel is relatively stable. In addition, the connecting structure between the converted LNG carrier hulls will increase to create sufficient deck space to install the LNG processing equipment.
    [0013] According to the invention, the converted LNG carriers are obtained by deactivating, from the original LNG carriers, at least one tank for liquefied natural gas (LNG). For spherical type LNG storage tanks (known as Moss type tanks) after decommissioning the subject tanks will be removed to make room for the process equipment in a flat platform arrangement. For example, a first and a second Moss conveyor could be used each with five LNG tanks. If two tanks are removed from each conveyor, at the resulting LNG plant, platform space equal to the platform space of four LNG storage tanks will be available for the installation of LNG processing equipment.
    [0014] For LNG storage tanks of the Membrane type, of the SPB type or any other type, which are located mainly below the main deck of the vessel, the deactivation will not necessarily consist of the physical removal of the tank(s), but will mean that this (these) tank(s) are no longer used for LNG storage, to offset the additional weight of the LNG processing equipment installed above the decommissioned tanks.
    [0015]Despite the fact that four LNG storage tanks have been removed, the resulting floating LNG plant will still have six LNG storage tanks available for the storage of liquefied gas. This means that the resulting floating LNG plant is provided with as much space for installing LNG processing equipment as it has space for storing LNG.
    [0016]It is possible to remove one or more LNG tanks from only the original first or second LNG carrier. Alternatively, one or more LNG tanks can be removed from the two original LNG carriers.
    [0017] According to a preferred embodiment of the invention the mooring system is provided with a tower to allow the puffing of the floating LNG plant. This tower can be an inner tower or an outer tower. The tower will be positioned at the front of the floating LNG plant. This means close to the bow of the converted LNG carriers. Alternatively, according to another embodiment the tower could also be positioned close to the stern of the LNG carrier.
    [0018] According to another embodiment (also not illustrated) the LNG plant can be arranged anchored in a more or less fixed orientation.
    [0019] According to a preferred embodiment of the invention the tower is placed external to each of the hulls of the first and second converted LNG carriers.
    [0020] According to a preferred embodiment of the invention the connecting structure provides additional deck space or deck space between the hull of the first and second converted LNG carrier and wherein the process equipment is installed at least partially in the deck space provided by the connection structure.
    [0021] According to a preferred embodiment, the floating LNG plant is connected by means of a flexible riser to the seabed for the transfer of gas between the plant and the seabed.
    [0022] According to a preferred embodiment of the invention the first and second converted LNG carriers are connected essentially parallel.
    [0023] According to a preferred embodiment of the invention the process equipment for processing LNG comprises means for the liquefaction of natural gas.
    [0024] According to a preferred embodiment of the invention, the floating LNG plant comprises storage means, for example, a reservoir for storage of separate fluids during LNG processing, said reservoir being positioned at least partially in the connection structure between the first and second converted LNG carrier.
    [0025] According to a preferred embodiment of the invention the floating LNG plant is provided with at least one stabilizer i.e. a connecting structure that provides additional deck space, but which also creates additional hull volume.
    [0026] According to a preferred embodiment of the invention the floating LNG plant is provided with LNG transfer devices for loading or unloading LNG.
    [0027] According to a preferred embodiment of the invention, the floating LNG carrier is provided with transfer devices for loading or unloading liquid hydrocarbons that are produced as by-products of the LNG process. These by-products comprise, for example, condensate.
    [0028] The invention also relates to a method for converting a first and a second LNG carrier into a floating LNG plant, wherein the LNG carrier comprises at least one hull and a plurality of LNG storage tanks, in that the method comprises: - removing from the first and/or second LNG carrier at least one LNG tank in order to obtain a first and second converted LNG carriers, - connecting the first and second LNG carrier converted by means of a connecting structure in order to obtain a double hull vessel, - install process equipment for LNG processing on the double hull vessel, and - install a mooring system on the double hull vessel to anchor the plant of LNG floating at the bottom of the sea.
    [0029] According to a preferred embodiment of the invention the method comprises the step of providing the anchoring system with a tower in order to allow the heeling of the floating LNG plant.
    [0030] According to a preferred embodiment of the invention the method comprises the step of connecting the connecting structure between the hull of the first and second converted LNG carrier in order to create additional deck space and install the process equipment at least partially in the additional deck space provided by the connecting structure.
    [0031] According to a preferred embodiment of the invention the method comprises the step of connecting the first and second converted LNG carrier so that they are essentially parallel.
    [0032] According to a preferred embodiment of the invention the process equipment for processing LNG comprises means to liquefy natural gas.
    [0033] According to a preferred embodiment of the invention, the method comprises the step of providing a reservoir to store separate fluids during LNG processing, said reservoir being positioned at least partially in the connecting structure between the first and second conveyor. Converted LNG.
    [0034] According to a preferred embodiment of the invention the method comprises the step of providing the floating LNG plant with at least one stabilizer to create additional hull volume.
    [0035] According to a preferred embodiment of the invention the method comprises the step of providing the floating LNG carrier with LNG transfer devices for loading or unloading the LNG.
    [0036] According to a preferred embodiment of the invention the method comprises the step of producing the floating LNG plant with transfer devices for loading or unloading liquid hydrocarbons, which are produced as by-products of the LNG process. Brief description of the drawings
    [0037] Figure 1 shows a possible embodiment of the floating LNG plant according to the invention.
    [0038] Figure 2 shows a top view of a second embodiment of the floating LNG plant according to Figure 1.
    [0039] Figure 3 shows a side view of the floating LNG plant according to Figure 2; and
    [0040] Figures 4 and 5 show a cross-sectional view of the floating LNG plant according to Figures 1-3, when viewed from the stern and from the bow, respectively.
    [0041] Figure 1 shows a possible embodiment of the floating LNG plant 1 according to the invention. The floating LNG plant 1 according to the invention comprises a first converted LNG carrier 10 on the starboard side of the floating LNG plant 1 and a second converted LNG carrier 20.
    [0042] The first converted LNG carrier 10 and a second converted LNG carrier 20 are connected in such a way as to be parallel by means of a connecting structure 30 (see Figure 2). This structure 30 ensures that the floating LNG plant 1 is in the form of a catamaran-type vessel, still referred to in this context as a “double hull” vessel. The connecting structure 30 also provides additional deck space between the two converted LNG carriers 10, 20.
    [0043] As shown in Figure 1, the floating LNG plant 1 further comprises an external tower 40. This tower 40 is positioned external to the hull, but close to the bow of the converted LNG carriers 10, 20, placed between the two hulls. The tower 40 is fixed to the connecting structure 30 of the floating LNG plant 1. Alternatively, the floating LNG plant is provided with an internal tower 41, as shown in Figure 2. According to another possible embodiment (not shown) the inner tower can be positioned at the stern of the floating LNG plant.
    [0044] Figure 1 shows that each converted LNG carrier 10, 20 is provided with the original staff accommodations 11, 21. If the necessary accommodation allows, one of the staff accommodations 11 or 12 can be removed. Furthermore, in the example in Figure 1, the two converted LNG carriers 10, 20 are provided with three LNG tanks. In this example, the arrangement of the LNG tanks provides the storage of 150,000 m3 of LNG.
    [0045] The volume according to another embodiment will depend on the volume of each spherical tank which may vary from vessel to vessel.
    [0046] In the example in Figure 1, the converted LNG carriers 10, 20 are obtained by removing two LNG tanks from an existing Moss-type LNG carrier. The space that is freed up by removing the two tanks twice is available for process equipment for LNG processing on board the floating LNG plant 1. Alternative arrangements are possible. The floating LNG plant may, for example, comprise two converted tankers from which three tanks are removed from a first LNG carrier to create the necessary deck space and no tanks are removed from the second LNG carrier (not shown). This allows the floating LNG platform to have enough storage space for LNG.
    [0047] Figure 2 shows a top or top view of the floating LNG plant according to Figure 1. In Figure 2 the connecting structure 30 between the two converted LNG carriers 10, 20 is clearly visible.
    [0048] As illustrated in Figure 2, floating LNG plant 1 is provided with a helicopter deck 50 on the stern side of floating LNG plant 1. In the example in Figure 2, floating LNG plant 1 is provided with discharge arms 60 on the starboard side of floating LNG plant 1. Floating LNG plant 1 illustrated in Figure 2 is adapted for side-by-side LNG discharge. Alternatively, the floating LNG plant can be provided with a stern discharge facility for discharge one after the other.
    [0049] Floating LNG plant 1 is provided with storage tanks for condensate that is produced as a by-product during LNG processing (see Figures 4 and 5). The floating LNG plant 1 is provided with means that allow the discharge of condensate one after the other. These unloading means are installed under the helicopter platform 50 or alternatively on the stern of the converted LNG carrier.
    [0050] According to a preferred embodiment of the invention, the freedom to select one or more specific LNG storage tanks for removal from the first and/or second LNG carrier allows obtaining maximum safety by separating the areas of functions Floating LNG plant principals, which are gas processing and liquefaction, LNG storage, liquid hydrocarbon potential storage, accommodation, LNG and liquid hydrocarbon transfer and mooring.
    [0051] Alternatively, the condensate produced can also be discharged through a loop-by-side transfer system (not illustrated).
    [0052] Figure 3 shows a side view of the floating LNG plant 1 according to Figures 1 and 2.
    [0053] Figures 4 and 5 show a cross-sectional view of the floating LNG plant 1 according to Figures 1-5, seen from the stern and from the bow, respectively. Figures 4 and 5 show the position of tanks 80 for storing liquid hydrocarbons such as condensate and/or LPG. Condensate and/or LPG is produced as a by-product during LNG processing on board floating LNG plant 1. Tanks 80 are positioned within connecting structure 30. Other compartments within converted LNG carriers can also be used to the storage of liquid hydrocarbons.
    [0054] In the example of Figures 4 and 5, storage tanks 80 typically provide storage of 200,000 bbl of condensate. According to other provisions, storage tanks may receive a greater amount of condensate.
    [0055] A possible arrangement for the liquefaction process on board the floating LNG plant 1 comprises, among other elements:-Electric steam turbine generators (STG) and associated vacuum condenser exchangers, drinking water booster pumps, -storage space for a quantity of stabilized condensate, -condensate export pumps, -deep well electric seawater pumping pumps mounted in submerged boxes, -sea water used for cooling the equipment on the upper side, -exchangers of coolant / seawater (CM/SW) plates for main process cooling located below sea level to reduce power demand on seawater booster pumps, additional ballast - either SW active or water passive permanent inhibited,-local equipment enclosure (LER) which contains electrical apparatus / motors and some local control equipment can be built long and thin, or divided into two enclosures s (one for electrical and one for instruments), - storage of any potential simple mixed refrigerant preparation refrigerants, if applicable (typically ethane, propane and butanes), - air compressors, dryers, nitrogen generation, water formulators sweet (some or all of them can be installed inside the engine room depending on the LNG carrier route), - fore-aft escape tunnel (this can be above deck, or not installed at all) ,-stern to bow cableways and fire water pipe heads (these can also be on deck),-compressor modules powered by turbine agas for the LNG refrigeration system,-boiling and vaporizing gas compressors instantaneous (if necessary),-equipment of the LNG export system for side-by-side discharge (hose system or rigid arm possible), or alternatively an LNG export system for discharge one after the other,-install inlet conditioning action (separation, heating and/or cooling), - condensate stabilization installation, - molar sieve dehydration installation, - arrangement for removal of CO2 from amine, - arrangement for mercury removal, - installation for extraction of LPG (destination),-fuel gas system,-combustible gas compression,-flame drums and stacking/venting masts,-deposition module and cranes.
    [0056] Floating LNG plant 1 will also comprise a refrigeration facility, including a main LNG refrigeration plant, which can be driven by means of direct mechanical drive or by other means. Ideally, this LNG cooling facility uses two 50% gas turbines. Alternative drives are also possible for the LNG cooling installation, eg fully electric.
    [0057] The simplest refrigeration system that is best suited to this concept is one of the dual refrigerant loop nitrogen or methane based systems because there is no need to produce or store refrigerants. An alternative that provides a slightly higher production capacity (assuming the same drivers are installed) is to use a single mixed refrigerant. In this case, composition refrigerants will be stored in up to four very thin type C tanks mounted next to the refrigeration equipment. In this case the refrigerants must be imported, not prepared on board to minimize the weight, occupancy, handling requirements and therefore reduce CAPEX to a minimum.
    [0058] Natural gas that is obtained in the form of a gas from natural gas and oil fields is discharged from the terrestrial source to form a natural gas feed that requires processing before it can be used commercially. The natural gas supply enters the onboard processing facility and is processed through a variety of operations at different facilities to finally emerge as a liquid natural gas (LNG) in a form that is suitable for storage, transfer and transportation with media acquaintances. The produced liquid gas is subsequently stored in LNG storage tanks from where it can be transferred to a transport tanker and transported to another suitable location for revaporization and subsequent use or otherwise transported. In the processing of the natural gas supply, the gas that emerges from the field where it appears naturally must first be pre-treated to remove or reduce concentrations of impurities or contaminants, such as, for example, carbon dioxide and water or the like, before to be cooled to form LNG in order to reduce or eliminate the chances of blocking the equipment used in processing and to overcome other processing difficulties. An example of impurities and/or contaminants is comprised of acid gases such as carbon dioxide and hydrogen sulphide. After the sour gas is removed in a sour gas removal facility, the supply gas stream is subjected to drying to remove all residual water. Mercury is also removed from the natural supply gas prior to cooling. Once all unnecessary and unwanted contaminants or materials are removed from the supply gas stream it undergoes further processing, such as cooling, to produce the LNG. Typically, natural gas compositions will be liquefied, under atmospheric pressure, in the temperature range of -165°C. down to -155°C. The critical or transformation temperature of natural gas is around -90°C. down to -80°C., which means that in practice natural gas cannot be liquefied purely by applying pressure, but must also be cooled below the transformation temperature.
    [0059] A liquefaction process that will be suitable for the floating LNG plant according to the invention includes a nitrogen-based multiple expansion process (e.g. triple) for LNG production with multiple expanders placed in parallel combined with multiple nitrogen pressure levels (high (HP: hot), intermediate (IP) and a low pressure level (LP: cold) and with at least one nitrogen sidestream to a nitrogen compressor unit.
    [0060] The nitrogen-based expansion process has many attractions, especially in terms of ease of start-up and shutdown, leading to higher availability and better inherent safety, as the process does not contain large inventories of flammable refrigerants. However, its efficiency is lower than the most popular dual stage refrigerant cycle processes.
    [0061] Existing dual-stage expansion processes are endowed with specific power demands in the range of about 420 to about 500 kWh/t of LNG, while the objective of this solution is to be able to reduce the demand for specific power below 400 kWh/t.
    [0062] The cooling of the natural gas feed can be accomplished through a number of different cooling process cycles, one of which involves the use of a nitrogen expansion cycle in which, in its simplest form, a closed circuit in which nitrogen gas is first compressed and cooled to ambient conditions with air or water cooling and then further cooled by countercurrent exchange with cold low pressure nitrogen gas. The cooled nitrogen stream is then expanded through a turboexpander to produce a low pressure cold stream. Cold nitrogen gas is used to cool the fed natural gas and high pressure nitrogen stream in a heat exchanger device. The work produced in the expander by the expanding nitrogen is recovered in a nitrogen booster compressor connected to the expander shaft. Thus, in this process cold nitrogen is not only used to liquefy the natural gas by cooling it, but cold nitrogen is also used to pre-cool or cool the nitrogen gas in the same heat exchanger. The pre-cooled or cooled nitrogen is then subsequently further cooled by expansion to form the cold nitrogen refrigerant.
    [0063] The process in this particular chosen embodiment is based on a triple expansion process for LNG production with multiple paralleled expanders combined with multiple levels of nitrogen pressure (high (HP: hot), intermediate (IP) and one level low pressure (LP: cold) and with at least one nitrogen sidestream to a nitrogen compressor unit.
    [0064] The method and process for liquefaction is indeed very suitable as an improved N2 expander process which is endowed with specific advantages for offshore use; it capitalizes on the inherent safety benefits of the N2 cooling process, but it also adds a certain complexity, it maximizes system efficiency combined with a relatively small footprint process.
    [0065] The process can be further improved by adding a third pressure level, and a third expansion step. In this configuration there will be four pressure levels for circulating nitrogen streams - high pressure from compressor discharge, two intermediate pressures, and low pressure.
    [0066] HP nitrogen will be sub-cooled in the cold box, and the first extraction stream will feed the HP expander, generating a cold N2 stream that is fed back to the cold box, and returns to the third stage suction of the main nitrogen compressor.
    [0067] More sub-cooled HP nitrogen is captured in a second extraction stream to feed the IP expander, generating a second stream of cold N2 that is fed back to the cold box, and returns to the second suction stage of the main nitrogen compressor.
    [0068] The remaining sub-cooled HP nitrogen is captured in a third extraction stream to feed the LP expander, generating a third stream of cold N2 that is fed back to the cold box, and returns to the first stage of suction of the main nitrogen compressor.
    [0069] Compressed nitrogen from the discharge of a third-stage compressor has the pressure even increased using the compressors coupled to the three turboexpanders. Each compressor is coupled to a respective turboexpander on a common drive shaft.
    [0070] The main nitrogen compressor is driven by means of a GT compressor driver, which according to one embodiment is a gas turbine, coupled by a drive shaft to the main nitrogen compressor.
    [0071] In this way, three levels of refrigeration are produced, and at the same time, since all return flows from the cold box are coupled to the main nitrogen compressor, the power of the main gas compressor is reduced to a minimum, thus improving the overall efficiency of the LNG production process.
    [0072] The efficiency of the entire process scheme can be further improved by adding a pre-cooling stage using a refrigerant circuit or any other refrigeration means, in order to reduce the inlet temperature of the process gas before entering the cold box.
    [0073] The description of the possible NL process systems to be applied to a floating LNG plant is not exhaustive. Other LNG process systems that are suitable for offshore use in a floating LNG plant can be applied if they are technically and economically feasible.
    [0074] It will be understood by the person skilled in the art that the floating LNG plant according to the invention can be used as an LNG re-gasification plant provided with a re-gasification unit instead of a gas liquefaction plant . In this case, the LNG stored in the tanks is transferred to the regasification plant in order to create gas again that can be exported through the tower and an export riser pipe connected to an offshore subsea gas pipeline.
    [0075] It is also within the scope of the invention that an offshore floating power plant can be provided if the floating re-gasification plant is provided with a gas driven power plant that is driven by gas which is re-gasified LNG. The electrical energy produced can be exported to land through an electrical swivel joint placed in a tower and through a submerged HV cable.
    权利要求:
    Claims (20)
    [0001]
    1 - Floating LNG plant (1) comprising a first and a second LNG carrier (10, 20), each provided with a hull and at least one LNG storage tank (14, 24), in which the plant of floating LNG further comprises:1 a connecting structure (30) for connecting the hull of the first and second LNG carrier in order to obtain a double-hull vessel,2 a process equipment to process LNG in the floating LNG plant, e3 an anchorage system (40, 41) to anchor the floating LNG plant to the seabed, characterized by the fact that each of the at least first and second LNG carriers (10, 20) are converted LNG carriers, each comprising an LNG carrier, originally provided with a plurality of LNG tanks (14, 24), wherein at least one LNG tank has been deactivated and/or removed from at least one LNG carrier to make space in the LNG plant. Floating LNG to install processing equipment that for LNG processing.
    [0002]
    2 - Floating LNG plant (1), according to claim 1, characterized in that the anchoring system is provided with a tower to allow the heeling of the floating LNG plant.
    [0003]
    3 - Floating LNG plant (1), according to claim 2, characterized in that the tower is placed external to each of the hulls of the first and second LNG carrier.
    [0004]
    4 - Floating LNG plant (1), according to any one of claims 1 to 3, characterized in that the connecting structure (30) provides additional deck space between the hull of the first (10) and the second ( 20) converted LNG conveyor and wherein the process equipment is at least partially installed in the additional deck space provided by the connecting structure (30).
    [0005]
    5 - Floating LNG plant (1), according to any one of claims 1 to 4, characterized in that the floating LNG plant is connected by means of a flexible riser pipe to the seabed for gas transfer between the power plant and the seabed.
    [0006]
    6 - Floating LNG plant (1), according to any one of the preceding claims, characterized in that the first and second converted LNG carrier (10, 20) are connected so as to be essentially parallel.
    [0007]
    7 - Floating LNG plant (1), according to any one of the preceding claims, characterized in that the process equipment for LNG processing comprises means for the liquefaction of natural gas.
    [0008]
    8. Floating LNG plant (1) according to any one of the preceding claims, characterized in that it comprises a reservoir (80) for storing separate fluids during LNG processing, said reservoir being positioned in the connecting structure (30) between the first and second converted LNG carrier (10, 20).
    [0009]
    9 - Floating LNG plant (1), according to any one of the preceding claims, characterized in that the floating LNG plant is provided with at least one stabilizer to create additional hull volume.
    [0010]
    10 - Floating LNG plant (1), according to any one of the preceding claims, characterized in that the floating LNG plant is provided with transfer devices to load or unload liquid hydrocarbons produced as a by-product of the LNG process.
    [0011]
    11 - Floating LNG plant (1), according to any one of the preceding claims, characterized in that the floating LNG plant is provided with LNG transfer devices (60) to load or unload the LNG.
    [0012]
    A method for converting a first and a second LNG carrier (10, 20) into a floating LNG plant as defined in any one of claims 1 to 11, wherein the LNG carrier comprises at least one hull and a plurality of LNG storage tanks (14, 24), the method being characterized in that it comprises: 15 removing from the first and/or second LNG Carrier at least one LNG tank, to obtain a first and a second LNG carrier converted,16 connecting the converted first and second LNG carriers by means of a connecting structure (30) in order to obtain a double-hull vessel,17 installing process equipment for LNG processing on the double-hull vessel, e18 install an anchorage system (40, 41) on the double hull vessel to anchor the floating LNG plant to the seabed.
    [0013]
    13 - Method according to claim 12, characterized in that the method comprises the step of providing the anchoring system with a tower to allow the heeling of the floating LNG plant.
    [0014]
    14 - Method according to claim 12 or 13, characterized in that the method comprises the step of connecting the connecting structure (30) between the hull of the first and second converted LNG carrier in order to create space for additional deck and installing the process equipment at least partially in the additional deck space provided by means of the connecting structure (30).
    [0015]
    15 - Method according to any one of claims 12 to 14, characterized in that the method comprises the step of connecting the first and the second converted LNG carrier so as to be arranged essentially parallel.
    [0016]
    16 - Method according to any one of claims 12 to 15, characterized in that the process equipment for LNG processing comprises means for liquefying natural gas.
    [0017]
    17 - Method according to any one of claims 12 to 16, characterized in that the method comprises the step of providing a reservoir (80) for storage of separate fluids during LNG processing, the reservoir being positioned in the connecting structure (30) between the first and second converted LNG carrier.
    [0018]
    18 - Method according to any one of claims 12 to 17, characterized in that the method comprises the step of providing the floating LNG plant with at least one stabilizer to create additional hull volume.
    [0019]
    19 - Method according to any one of claims 12 to 18, characterized in that the method comprises the step of providing the floating LNG plant with LNG transfer devices (60) to load or unload the LNG.
    [0020]
    20 - Method according to any one of claims 12 to 19, characterized in that the method comprises the step of producing the floating LNG plant with transfer devices to load or unload liquid hydrocarbons, which are produced as by-products of the process of LNG.
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    同族专利:
    公开号 | 公开日
    EP2838784B1|2017-08-23|
    AU2013251088B2|2017-04-20|
    WO2013156623A1|2013-10-24|
    US20150075216A1|2015-03-19|
    EP2838784A1|2015-02-25|
    BR112014026125A2|2017-06-27|
    CN104302540A|2015-01-21|
    AU2013251088A1|2014-11-06|
    US9422037B2|2016-08-23|
    US20160214687A1|2016-07-28|
    CN104302540B|2017-08-04|
    KR102120061B1|2020-06-09|
    KR20150011808A|2015-02-02|
    SG11201406710YA|2014-11-27|
    AP2014008023A0|2014-10-31|
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    法律状态:
    2018-02-06| B25A| Requested transfer of rights approved|Owner name: SINGLE BUOY MOORINGS INC (CH) |
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-03-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-06-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-10| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 19/04/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP12165070|2012-04-20|
    EP12165070.9|2012-04-20|
    PCT/EP2013/058227|WO2013156623A1|2012-04-20|2013-04-19|Floating lng plant comprising a first and a second converted lng carrier and a method for obtaining the floating lng plant|
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