DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD. Patent applications |
Patent application number | Title | Published |
20150321741 | FLOOR DEVICE CAPABLE OF UP-DOWN MOVEMENT FOR VESSELS - Provided is a floor apparatus which is vertically movable with a thruster canister within a vertical trunk of a hull. The floor apparatus includes a floor frame which is installed in an upper space of a vertical trunk of a ship, that is, a space above a thruster canister. The floor frame is installed to be vertically movable along the vertical trunk. The side of the floor frame is installed to be vertically movable while being guided along the sidewall of the vertical trunk. In particular, at least one pair of guide frames which guide the side of the floor frame are symmetrically installed on the sidewall of the vertical trunk. | 11-12-2015 |
20150316208 | LIQUEFIED GAS PROCESSING SYSTEM FOR SHIP - Disclosed is a liquefied gas processing system for a ship that includes a storage tank that stores liquefied natural gas, and an engine that uses the liquefied natural gas stored in the storage tank as fuel. The liquefied gas processing system of the present invention comprises: a storage tank that stores liquefied gas; an engine that uses the liquefied gas stored in the storage tank as fuel; and a fuel supply line that can vaporize the liquefied gas and supply the generated gas to the engine as fuel. The engine receives a supply of the fuel gas that is pressurized at a low pressure. | 11-05-2015 |
20140360226 | MODULE FOR TREATMENT OF CARBON DIOXIDE AND TREATMENT METHOD THEREOF - Liquid carbon dioxide separated from sour gas is expanded by throttling decompression and is gas-liquid separated at a low temperature so as to be supplied for shipping or the improvement of petroleum recovery. Methane generated from a stranded gas well is allowed to pass as a coolant through liquid carbon dioxide separated and discharged from sour gas generated from the stranded gas well so as to cool liquid carbon dioxide. Disclosed is a module for treating carbon dioxide, and a treatment method thereof for supplying liquid carbon dioxide at a proper temperature and state conditions when there is a need for liquid carbon dioxide of very low temperature for the storage or collection of carbon dioxide, the improvement of petroleum recovery, or the like by cooling carbon dioxide using a material separated from sour gas of a stranded gas well as a coolant. | 12-11-2014 |
20140290279 | LIQUEFIED GAS TREATMENT SYSTEM FOR VESSEL - A liquefied gas treatment system includes: a first stream of boil-off gas, which is generated from the liquefied natural gas in the cargo tank and is discharged from the cargo tank; a second stream of the boil-off gas, which is supplied as fuel to the engine in the first stream; and a third stream of the boil-off gas, which is not supplied to the engine in the first stream. The first stream is compressed in a compressor and is then branched into the second stream and the third stream. The third stream is liquefied by exchanging heat with the first stream in a heat exchanger, so that the boil-off gas is treated without employing a reliquefaction apparatus using a separate refrigerant. | 10-02-2014 |
20140286788 | WIND POWER GENERATOR - Disclosed is a wind power generator. The wind power generator according to the present invention includes: a crane part provided on a main frame, which is disposed within a nacelle to support a weight including a gear box or a generator, to transfer the weight inside or outside the nacelle when replacing the weight; and a tower collision prevention part spacing an elevation member supporting the weight from a tower supporting the nacelle to prevent the weight from colliding with the tower. | 09-25-2014 |
20140260255 | SHIP CAPABLE OF RUNNING SELECTIVELY WITH LIQUEFIED FUEL GAS MAIN DRIVE ENGINE AND LIQUEFIED FUEL GAS GENERATOR ENGINE - A ship includes: a high-pressure injection engine using fuel gas as fuel to obtain a propulsion power of the ship; a generator engine using fuel gas as fuel to generate electricity; a motor generating a power by using the electricity generated from the generator engine; a propulsion propelling the ship; a main clutch connecting the high-pressure injection engine to the propulsion; an auxiliary clutch connecting the gear box to the propulsion; and a gear box disposed in a front side of the propulsion and power-connected to the main clutch and the auxiliary clutch. The high-pressure injection engine and the motor are selectively power-connected to the propulsion to obtain the propulsion power of the ship. | 09-18-2014 |
20140196474 | COLD HEAT RECOVERY APPARATUS USING AN LNG FUEL, AND LIQUEFIED GAS CARRIER INCLUDING SAME - Provided are a cold heat recovery apparatus using an LNG fuel and a liquefied gas carrier, in which costs involved in the installation and operation of a reliquefying facility can be reduced by recovering and utilizing cold heat of the LNG fuel when boil-off gas of liquefied gas as a cargo is reliquefied, and energy saving and reduction of environmental pollutants can be achieved because additional energy is not consumed in a reliquefaction process. A cold heat recovery apparatus for processing boil-off gas generated in a liquefied gas tank by using cold heat of an LNG fuel includes cold heat usage means using cold heat of an LNG supplied from an LNG fuel tank storing an LNG as a fuel to an engine, so as to processing the boil-off gas generated in the liquefied gas tank. | 07-17-2014 |
20140116317 | DRILLING SHIP FOR A POLAR REGION - Provided is an arctic drill ship an arctic drill ship which includes a weather tight structure protecting a drill floor from air, and a side strake supporting the weather tight structure around a drilling work area. It is possible to economically and easily manufacture the weather tight structure which minimizes the influence of outside air on the drilling operation in the polar regions, and it is possible to efficiently support the hull longitudinal strength and the weather tight structure with the use of the side strake structure solely. Therefore, a structure which may cause a disturbance in the drilling work area is minimized, and it is unnecessary to install a separate structural reinforcement member for a drilling workspace in the polar regions. In addition, the drilling workspace in the polar regions can be effectively ensured, and a spatial limitation in an upper portion of a moonpool can be solved. | 05-01-2014 |
20140102345 | DRILLING SHIP FOR A POLAR REGION - Provided is an arctic drill ship in which a weather tight structure protecting a drill floor and a drilling work area from outside air is coupled to a side strake around the drilling work area. It is possible to economically and easily manufacture the weather tight structure which minimizes the influence of outside air on the drilling operation in the polar regions, and it is possible to efficiently support the hull longitudinal strength and the weather tight structure with the use of the side strake structure solely. Therefore, a structure which may cause a disturbance in the drilling work area is minimized, and it is unnecessary to install a separate structural reinforcement part for a drilling workspace in the polar regions. In addition, the drilling workspace in the polar regions can be effectively ensured, and a spatial limitation in an upper portion of a moonpool can be solved. | 04-17-2014 |
20140075943 | METHOD FOR OPERATING FUEL SUPPLY SYSTEM FOR MARINE STRUCTURE HAVING RELIQUEFACTION APPARATUS AND HIGH-PRESSURE NATURAL GAS INJECTION ENGINE - Provided is a method for operating a fuel supply system for a marine structure. The fuel supply system includes a BOG compression unit configured to receive and compress BOG generated in a storage tank, a reliquefaction apparatus configured to receive and liquefy the BOG compressed by the BOG compression unit, a high-pressure pump configured to compress the liquefied BOG generated by the reliquefaction apparatus, and a high-pressure gasifier configured to gasify the liquefied BOG compressed by the high-pressure pump. The fuel supply system includes a recondenser installed at an upstream side of the high-pressure pump, and the recondenser recondenses a portion or all of the generated BOG by using liquefied gas supplied from the storage tank. During a ballast voyage process, all of the BOG is supplied to and recondensed by the recondenser, and an operation of the reliquefaction apparatus is interrupted. | 03-20-2014 |
20140069931 | LIQUEFIED NATURAL GAS STORAGE CONTAINER AND METHOD FOR MANUFACTURING THE SAME - Provided are an LNG storage container with an inner shell, which is capable of efficiently storing LNG or pressurized LNG (PLNG) pressurized at a predetermined pressure and supplying the LNG or PLNG to a consumption place, and capable of reducing manufacturing costs by minimizing the use of a metal having excellent low temperature characteristic, and a method for manufacturing the same. The LNG storage container includes: an inner shell configured to store LNG inside; an outer shell configured to enclose the outside of the inner shell such that a space is formed between the inner shell and the outer shell; a support installed in the space between the inner shell and the outer shell to support the inner shell and the outer shell; and a heat insulation layer part installed in the space between the inner shell and the outer shell and configured to reduce a heat transfer. | 03-13-2014 |
20140069118 | METHOD AND SYSTEM FOR SUPPLYING FUEL TO HIGH-PRESSURE NATURAL GAS INJECTION ENGINE - Provided is a fuel supply system for a marine structure using a high-pressure natural gas injection engine. The fuel supply system includes: a boil-off gas (BOG) compression unit configured to receive and compress BOG generated in a storage tank storing a liquefied gas; a reliquefaction apparatus configured to receive and liquefy the BOG compressed by the BOG compression unit; a buffer tank configured to receive the liquefied BOG from the reliquefaction apparatus and separate the reliquefied BOG into a gaseous component and a liquid component; a high-pressure pump configured to receive the liquid component from the buffer tank and compress the liquid component; and a high-pressure gasifier configured to gasify the liquid component compressed by the high-pressure pump and supply the gasified liquid component to the high-pressure natural gas injection engine. | 03-13-2014 |
20140069117 | NON-EXPLOSIVE MIXED REFRIGERANT FOR RE-LIQUEFYING DEVICE IN SYSTEM FOR SUPPLYING FUEL TO HIGH-PRESSURE NATURAL GAS INJECTION ENGINE - Provided is a nonflammable mixed refrigerant for use in a reliquefaction apparatus of a fuel supply system that compresses BOG generated in an LNG storage tank to a medium pressure, reliquefies the compressed BOG, compresses the reliquefied BOG to a high pressure, gasifies the compressed requefied BOG, and supplies the gasified BOG to a high-pressure natural gas injection engine. A nonflammable mixed refrigerant for use in a fuel supply system for a high-pressure natural gas injection engine is provided. The nonflammable mixed refrigerant cools the BOG by heat exchange with the BOG in the reliquefaction apparatus. The nonflammable mixed refrigerant comprises a mixture of nonflammable refrigerants with different boiling points, and the boiling point of each of the nonflammable refrigerant ranges between a room temperature and a liquefaction temperature of natural gas. | 03-13-2014 |
20140060110 | FUEL SUPPLY SYSTEM FOR MARINE STRUCTURE HAVING RELIQUEFACTION APPARATUS AND HIGH-PRESSURE NATURAL GAS INJECTION ENGINE - Provided is a fuel supply system for a marine structure. The fuel supply system includes a BOG compression unit configured to receive and compress BOG generated in a storage tank, a reliquefaction apparatus configured to receive and liquefy the BOG compressed by the BOG compression unit, a high-pressure pump configured to compress the liquefied BOG generated by the reliquefaction apparatus, and a high-pressure gasifier configured to gasify the liquefied BOG compressed by the high-pressure pump. The fuel supply system includes a recondenser installed at an upstream side of the high-pressure pump and configured to recondense a portion or all of the generated BOG by using liquefied gas received from the storage tank. The BOG compression unit compresses BOG to a pressure of about 12 to 45 bara such that the BOG is liquefied under the compression pressure of the BOG compression unit. | 03-06-2014 |
20140053600 | SYSTEM FOR SUPPLYING FUEL TO HIGH-PRESSURE NATURAL GAS INJECTION ENGINE HAVING EXCESS EVAPORATION GAS CONSUMPTION MEANS - Provided is a fuel supply system for a high-pressure natural gas injection engine. The fuel supply system includes: a BOG compression unit configured to receive BOG, which is generated in a storage tank, from the storage tank and compress the received BOG to a pressure of 12 to 45 bara; a reliquefaction apparatus configured to receive and liquefy the BOG compressed by the BOG compression unit; a high-pressure pump configured to compress the BOG liquefied by the reliquefaction apparatus; a high-pressure gasifier configured to gasify the BOG compressed by the high-pressure pump and supply the gasified BOG to the high-pressure natural gas injection engine; and an excess BOG consumption unit configured to consume excess BOG corresponding to a difference between an amount of BOG generated in the storage tank and an amount of BOG required as fuel for the high-pressure natural gas injection engine. | 02-27-2014 |
20130340474 | FUEL SUPPLY METHOD FOR HIGH-PRESSURE NATURAL GAS INJECTION ENGINE - Provided is a fuel supply method for a marine structure using a high-pressure natural gas injection engine. BOG stored in a stored in the storage tank is compressed to a pressure of 12 to 45 bara (absolute pressure) and then reliquefied. A reliquefaction apparatus includes a cold box configured to exchange heat between a refrigerant and the BOG, a compression unit configured to compress the refrigerant heated by the cold box, an expansion unit configured to expand the compressed refrigerant to drop the temperature thereof, and a plurality of gas-liquid refrigerant separators configured to separate the refrigerant into a gaseous refrigerant and a liquid refrigerant. A gaseous refrigerant and a liquid refrigerant separated by the gas-liquid refrigerant separator disposed at an upstream side are again mixed and supplied to the gas-liquid refrigerant separator disposed at the most downstream among the plurality of gas-liquid refrigerant separators. | 12-26-2013 |
20130306643 | LNG TANK AND OPERATION OF THE SAME - Disclosed is a liquefied natural gas storage apparatus. The apparatus includes a heat insulated tank and liquefied natural gas contained in the tank. The tank has heat insulation sufficient to maintain liquefied natural gas therein such that most of the liquefied natural gas stays in liquid. The contained liquefied natural gas has a vapor pressure from about 0.3 bar to about 2 bar. The apparatus further includes a safety valve configured to release a part of liquefied natural gas contained in the tank when a vapor pressure of liquefied natural gas within the tank becomes higher than a cut-off pressure. The cut-off pressure is from about 0.3 bar to about 2 bar. | 11-21-2013 |
20130301678 | TEMPERATURE AND PRESSURE MONITORING SYSTEM OF SEALED DERRICK STRUCTURE - Provided is a system for monitoring temperature and pressure of an enclosed derrick structure communicating with a moonpool, which senses abnormal internal temperature and pressure of the enclosed derrick structure by monitoring the temperature and pressure of the enclosed derrick structure, thereby effectively coping with dangers. The system may include: one or more temperature sensors installed in the inside of the enclosed derrick to monitor an internal temperature of the enclosed derrick; one or more pressure sensors installed in the inside of the moonpool to monitor an internal pressure difference of the moonpool; and one or more damping units installed in a side of the enclosed derrick to supply air to the inside of the enclosed derrick or exhaust air to the outside of the enclosed derrick in order to cope with an abnormal internal temperature of the enclosed derrick and an abnormal internal pressure variation of the moonpool. | 11-14-2013 |
20130300135 | LOCKING DEVICE FOR A DAMPING APPARATUS FOR A MOON POOL - Provided is a locking apparatus for a damping device of a moonpool, which can automatically lock and unlock an opened state of the damping device of the moonpool. The locking apparatus includes: one or more first locking members installed in a sidewall of the moonpool; one or more second locking members installed in a side of the damping device; and a holding unit separably holding the first locking members and the second locking members when the damping devices are in the opened state. | 11-14-2013 |
20130299501 | STORAGE CONTAINER FOR LIQUEFIED NATURAL GAS - A LNG storage container includes: an inner shell made of a metal withstanding a low temperature of the LNG and configured to store the LNG inside; an outer shell made of a steel withstanding an internal pressure of the inner shell and configured to enclosing the outside of the inner shell such that a space is formed between the inner shell and the outer shell; and a heat insulation layer part installed in the space between the inner shell and the outer shell and configured to reduce a heat transfer. | 11-14-2013 |
20130292131 | DAMPING APPARATUS FOR MOONPOOL - Provided is a damping apparatus for a moonpool, which has a simple driving mechanism. The damping apparatus includes one or more damping plates which cover a moonpool of a hull entirely or partially. The damping plates are pivotally hinged to a sidewall of the moonpool, and one or more conveying units are disposed above the moonpool to convey drilling equipment. Driving wires are coupled between the conveying units and the damping plates, and the conveying force of the conveying units is transferred through the driving wires to the damping plates. Thus, the damping plates are pivoted to open and close the moonpool entirely or partially. | 11-07-2013 |
20130291780 | SEALED DERRICK STRUCTURE FOR POLAR VESSELS - Provided is an enclosed derrick structure of an arctic ship, which provides an installation space for an exhaust unit at an upper portion of an enclosed derrick. The enclosed derrick structure of the arctic ship includes: an enclosed derrick; a crown block section disposed at an upper portion of the enclosed derrick such that a crown block is installed and an installation workspace is formed thereinside; and an exhaust unit installed in the installation workspace to communicate with the exterior. | 11-07-2013 |
20130277062 | DAMPER STRUCTURE FOR A SEALED DERRICK - Provided is a damper structure for an enclosed derrick, which can constantly compensate and maintain a pressure of an inner space of an enclosed derrick structure. The damper structure for the enclosed derrick includes: one or more communication ducts installed in a side of the enclosed derrick; and one or more open/close dampers coupled to the communication ducts to open or close the communication ducts, whereby air is selectively supplied to or exhausted from the enclosed derrick. | 10-24-2013 |
20130255561 | DEVICE FOR DIMINISHING FLOW RESISTANCE IN MOON POOL - A device for diminishing flow resistance in a moon pool is disclosed. The device includes a guide structure ( | 10-03-2013 |
20130219955 | METHOD FOR PRODUCING PRESSURIZED LIQUEFIED NATURAL GAS, AND PRODUCTION SYSTEM USED IN SAME - A method for producing pressurized liquefied natural gas and a production system therefor are provided. The method for producing pressurized liquefied natural gas includes: performing a dehydration process to remove water from natural gas supplied from a natural gas field, without a process of removing acid gas from the natural gas; and performing a liquefaction process to produce pressurized liquefied natural gas by liquefying the natural gas, which has undergone the dehydration process, at a pressure of 13 to 25 bar and a temperature of −120 to −95° C., without a process of fractionating natural gas liquid (NGL). Accordingly, it is possible to reduce plant construction costs and maintenance expenses and reduce LNG production costs. In addition, it is possible to guarantee high economic profit and reduce payback period in small and medium-sized gas fields, from which economic feasibility could not be ensured by the use of a conventional method. | 08-29-2013 |
20130192510 | SHIP FOR TRANSPORTING A LIQUEFIED NATURAL GAS STORAGE CONTAINER - An LNG storage container carrier includes: one or more cargo holds provided on a hull such that upper portions thereof are opened; a plurality of first and second upper supports installed on the cargo holds in a width direction and a length direction to partition the upper portions of the cargo holds into a plurality of openings, wherein storage containers are vertically inserted into the openings and supported; and a lower support installed under the cargo holds and supporting the bottoms of the storage containers inserted into the openings. Accordingly, it is possible to efficiently and stably transport the storage containers storing LNG or PLNG pressurized at a predetermined pressure. Such storage containers may be transported through simple modification of the existing container carrier. | 08-01-2013 |
20130137318 | FLOATING STRUCTURE HAVING AN UPPER DECK FUEL TANK - A floating structure with an on-deck fuel tank that is surrounded by a cover is provided. In the floating structure, since the fuel tank is covered by the cover, the fuel tank is sealed without being exposed to air, thereby enhancing safety. The fuel tank is configured to store liquefied fuel gas to be used as fuel. The fuel tank is installed on a deck of the floating structure, and the exterior of the fuel tank is surrounded by a cover. | 05-30-2013 |
20130118396 | CARGO HOLD STRUCTURE FOR A CRUDE OIL CARRIER - A cargo hold structure for an oil tanker is provided, in which a plurality of vertical webs that is mounted on longitudinal bulkheads of the cargo hold in a height direction of a hull is made wide and horizontal girders which connect the vertical webs to each other and support them, thereby controlling the sloshing load of the cargo hold and improving the structural strength of the cargo hold without having to mount crossties. The cargo hold structure includes a longitudinal bulkhead ( | 05-16-2013 |
20120260674 | FLOATING MARINE STRUCTURE HAVING LNG CIRCULATING DEVICE - Disclosed is an apparatus for containing LNG. The apparatus includes an LNG tank containing liquid phase LNG and boil-off gas of LNG, and an circulating device. The circulating device includes an intake port and a discharge port. The circulating device further includes an flowing pathway from the intake port to the discharge port that does not include a forced LNG liquefying device. The intake port is located in an upper portion of the LNG tank, and the discharge port is located in a lower portion of the LNG tank substantially lower than the intake port. The circulating device is configured to suction, through the intake port, boil-off gas from the upper portion of the LNG tank and to discharge boil-off gas, through the discharge port, to the lower portion of the LNG tank. | 10-18-2012 |
20120252285 | SHIP CAPABLE OF RUNNING SELECTIVELY WITH LIQUEFIED FUEL GAS MAIN DRIVE ENGINE AND LIQUEFIED FUEL GAS GENERATOR ENGINE - A ship includes: a high-pressure injection engine using fuel gas as fuel to obtain a propulsion power of the ship; a generator engine using fuel gas as fuel to generate electricity; a motor generating a power by using the electricity generated from the generator engine; a propulsion propelling the ship; a main clutch connecting the high-pressure injection engine to the propulsion; an auxiliary clutch connecting the gear box to the propulsion; and a gear box disposed in a front side of the propulsion and power-connected to the main clutch and the auxiliary clutch. The high-pressure injection engine and the motor are selectively power-connected to the propulsion to obtain the propulsion power of the ship. | 10-04-2012 |
20120240874 | SHIP FOR SUPPLYING LIQUIFIED FUEL GAS - A ship for bunkering liquefied fuel gas to a liquefied-fuel-gas propulsion ship includes: a liquefied-fuel-gas storage tank installed in the ship; a fuel supply pipe connected to the liquefied-fuel-gas storage tank and supplying fuel to the liquefied-fuel-gas propulsion ship; and a BOG collection pipe collecting BOG produced in a liquefied fuel gas tank of the liquefied-fuel-gas propulsion ship. | 09-27-2012 |
20120238161 | FLOATING STRUCTURE WITH FUEL TANK FOR GAS FUEL - Disclosed herein is a floating structure with a fuel gas tank for storing gas fuel to be fed to a dual fuel propulsion system under a cabin area. According to the present invention, there is provided a floating structure with a fuel gas tank storing gaseous fuel used as fuel while floating at sea, including: a cabin area disposed on an upper deck of the floating structure; a fuel gas tank mounted under the cabin area in the hull of the floating structure; and a blocking member mounted between the cabin area and the fuel gas tank to secure safety of the cabin area. | 09-20-2012 |
20120108117 | APPARATUS AND METHOD FOR GENERATING ELECTRICITY IN LIQUEFIED NATURAL GAS CARRIER - Provided is an apparatus for generating electricity required by an LNG carrier which stores LNG, which is obtained by liquefying natural gas to ultra low temperature in a gas field, in an LNG storage tank and carries the stored LNG. The apparatus includes: a reformer reforming boil-off gas occurring in the LNG storage tank and producing synthetic gas; and a fuel cell generating electricity through an electrochemical reaction of the synthetic gas produced by the reformer. | 05-03-2012 |
20120060516 | FUEL GAS SUPPLY SYSTEM AND METHOD OF AN LNG CARRIER - A fuel gas supply system of a vessel, such as an LNG carrier, is provided for supplying fuel gas to a high-pressure gas injection engine of an LNG carrier, wherein LNG is extracted from an LNG storage tank of the LNG carrier, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. In one embodiment, the system includes a boil-off gas reliquefaction apparatus for reliquefying boil-off gas generated in the LNG tank. | 03-15-2012 |
20120055171 | FUEL GAS SUPPLY SYSTEM AND METHOD OF AN LNG CARRIER - A fuel gas supply system of a vessel, such as an LNG carrier, is provided for supplying fuel gas to a high-pressure gas injection engine of an LNG carrier, wherein LNG is extracted from an LNG storage tank of the LNG carrier, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. In one embodiment, the system includes a boil-off gas reliquefaction apparatus for reliquefying boil-off gas generated in the LNG tank. | 03-08-2012 |
20120017608 | UNLOADING OF LNG FROM LNG TANK - Disclosed is a liquefied natural gas storage apparatus. The apparatus includes a heat insulated tank and liquefied natural gas contained in the tank. The tank has heat insulation sufficient to maintain liquefied natural gas therein such that most of the liquefied natural gas stays in liquid. The contained liquefied natural gas has a vapor pressure from about 0.3 bar to about 2 bar. The apparatus further includes a safety valve configured to release a part of liquefied natural gas contained in the tank when a vapor pressure of liquefied natural gas within the tank becomes higher than a cut-off pressure. The cut-off pressure is from about 0.3 bar to about 2 bar. | 01-26-2012 |
20110277497 | METHOD AND APPARATUS FOR PROCESSING HYDROCARBON LIQUEFIED GAS - A method and apparatus for processing natural gas composed of various hydrocarbon components for transportation of the natural gas to a demand side without separation of the hydrocarbon components, such that the natural gas can be used by consumers after being separated into the hydrocarbon components according to the needs of the demand side. The apparatus includes a storage tank and a hydrocarbon liquefied gas mixture accommodated in the storage tank. The mixture has hydrocarbon components composed of methane, ethane, propane and butane, and is produced by liquefying raw natural gas without changing the relative ratio of methane, ethane, propane and butane in the raw natural gas immediately after extraction from the gas well. The method and apparatus can be applied to floating marine structures. | 11-17-2011 |
20110108129 | SYSTEM AND METHOD FOR DECREASING VOC IN CRUDE OIL TANKER - A system for decreasing volatile organic compounds (VOC) in a crude oil tanker includes: a supply pipe horizontally installed over a crude oil storage tank of the crude oil tanker and having an end connected to a crude oil storage tank on land; a load pipe vertically connected to a bottom surface of the supply pipe, vertically passing through the crude oil storage tank of the crude oil tanker, and communicating with a lower part of the crude oil storage tank; a distribution pipe horizontally connected to a lower end of the load pipe; and a pressure control unit installed at a lower end portion of the load pipe. | 05-12-2011 |
20110061578 | ROLL SUPPRESSION DEVICE FOR OFFSHORE STRUCTURE - The present disclosure relates to a roll-suppression device for an offshore structure. The device includes a damping plate separated downward from a hull to be placed below a bottom of the offshore structure by a connection unit, so that the width of the damping plate may be effectively enlarged without occurrence of collision during shuttle docking or ship-to-ship operation. Accordingly, the device may maximize roll-suppression, as compared with a bilge-keel or a step, and a detachable design of the device facilitates ship construction or shore operation inside a drydock. | 03-17-2011 |
20100122542 | METHOD AND APPARATUS FOR ADJUSTING HEATING VALUE OF NATURAL GAS - Disclosed is a method and apparatus for adjusting heating value of natural gas, wherein components having high heating value are separated from natural gas consisting of various hydrocarbon components to reduce heating value of natural gas supplied to the markets. The method includes heating liquefied natural gas (LNG), separating the LNG heated and partially gasified into a gaseous component having low heating value and a liquid component having high heating value. | 05-20-2010 |
20100058780 | Liquefied Gas Storage Tank and Marine Structure Including the Same - The present disclosure relates to a liquefied gas storage tank and a marine structure including the same. The storage tank includes a plurality of liquefied gas storage tanks received in a plurality of spaces defined in a hull of the marine structure by a cofferdam and arranged in two rows. The cofferdam includes at least one longitudinal cofferdam extending in a longitudinal direction of the hull and at least one transverse cofferdam extending in a transverse direction of the hull. Each of the storage tanks is sealed and thermally insulated by a sealing wall and a thermal insulation wall extending without being disconnected. The longitudinal cofferdam supports load of an upper structure while suppressing a sloshing phenomenon. | 03-11-2010 |
20100012015 | STORAGE TANK CONTAINING LIQUEFIED NATURAL GAS WITH BUTANE - Disclosed is a liquefied natural gas composition. The composition contains methane, ethane and propane and butane. The composition contains a substantial amount of butane while being substantially free of hydrocarbon molecules larger than butane. | 01-21-2010 |
20090293506 | Semi-Submersible Offshore Structure Having Storage Tanks for Liquified Gas - Disclosed herein is a semi-submersible offshore structure having storage tanks for liquefied gas, which is constructed so as to improve workability in marine offloading of the liquefied gas stored in the storage tanks while reducing an influence of sloshing. The offshore structure is anchored at sea and has liquefied gas. The offshore structure includes a storage tank storing liquefied gas, a plurality of columns partially submerged under the sea level and each having the storage tank therein, and an upper deck located on the plurality of columns to connect the columns to each other. | 12-03-2009 |
20090266086 | FLOATING MARINE STRUCTURE HAVING LNG CIRCULATING DEVICE - Disclosed is an apparatus for containing LNG. The apparatus includes an LNG tank containing liquid phase LNG and boil-off gas of LNG, and an circulating device. The circulating device includes an intake port and a discharge port. The circulating device further includes an flowing pathway from the intake port to the discharge port that does not include a forced LNG liquefying device. The intake port is located in an upper portion of the LNG tank, and the discharge port is located in a lower portion of the LNG tank substantially lower than the intake port. The circulating device is configured to suction, through the intake port, boil-off gas from the upper portion of the LNG tank and to discharge boil-off gas, through the discharge port, to the lower portion of the LNG tank. | 10-29-2009 |
20090259081 | METHOD AND SYSTEM FOR REDUCING HEATING VALUE OF NATURAL GAS - Disclosed is a system for reducing a heating value of natural gas. The system includes a heat exchanger to liquefy a portion of components having high heating values, a gas-liquid separator to separate the liquefied component, and a nitrogen adding mechanism to add nitrogen to remaining non-liquefied components. The system includes an additional heat exchanger to cool and liquefy the remaining non-liquefied components after the gas-liquid separator separates the liquefied component from the natural gas. The heat exchangers employ cold heat generated upon regasification of LNG. The system can reduce the heating value of natural gas composed of a variety of hydrocarbon components according to requirements of a place of demand by separating the component with the higher heating value from the natural gas to allow the separated component to be used as fuel, thereby reducing an overall size and operating costs of the system. | 10-15-2009 |
20090249799 | APPARATUS AND METHOD FOR INCREASING EFFICIENCY OF A GAS TURBINE AND A MARINE STRUCTURE HAVING THE SAME - An apparatus and method for increasing efficiency of a gas turbine and a marine structure having the gas turbine are disclosed. The marine structure has a cargo tank for storing cryogenic liquefied natural gas (LNG) and a gas turbine for generating electric power. The marine structure further includes a heat exchanger to cool air for combustion supplied to the gas turbine using a cold source or cold heat of the LNG stored in the cargo tank, a heat transfer medium circuit to indirectly transfer the cold source of the LNG stored in the cargo tank to the heat exchanger, and a heater to heat a heat transfer medium having undergone heat exchange with the air for combustion while passing through the heat exchanger. The temperature of air supplied to the gas turbine is lowered using the cold source generated upon regasification of LNG in the marine structure, thereby increasing the efficiency of the gas turbine. | 10-08-2009 |
20090249798 | APPARATUS AND METHOD FOR INCREASING EFFICIENCY OF A GAS TURBINE AND A MARINE STRUCTURE HAVING THE SAME - An apparatus and method for increasing efficiency of a gas turbine and a marine structure having the gas turbine are disclosed. The marine structure includes an ambient LNG vaporizer for regasifying cryogenic LNG via heat exchange with air and the gas turbine for generating electric power. The marine structure includes a moist-air mixing chamber disposed at an upstream side of the gas turbine, a condensed-water nozzle to spray condensed water, generated from air during the heat exchange in the LNG vaporizer, into the moist-air mixing chamber; and a cold air supply pipe to supply air, cooled by the heat exchange in the LNG vaporizer, to the gas turbine via the moist-air mixing chamber. The method reduces the temperature of air supplied to the gas turbine by condensed water or cold air generated during regasification of LNG through the ambient vaporizer in the marine structure, thereby increasing the efficiency of the gas turbine. | 10-08-2009 |
20090233500 | FLOATING STRUCTURE HAVING PROPULSIVE DEVICES FOR MOVING THE SAME WHILE SAILING AND MOORING - Disclosed is a floating system. The floating system comprises a floating body, a first propeller and a second propeller. The first propeller is pivotally secured to the floating body. The second propeller is pivotally secured to the floating body and distanced from the first propeller in a first direction and in a second direction perpendicular to the first direction. The first and second directions are generally parallel to a surface of water on which the floating system floats. | 09-17-2009 |
20090218354 | LIQUEFIED NATURAL GAS STORAGE TANK FOR FLOATING MARINE STRUCTURE - Disclosed is a floating marine apparatus including a liquefied natural gas (LNG) tank. The apparatus includes a first LNG containing compartment and a second LNG containing compartment next to the first compartment. The apparatus further includes a bottom passage interconnecting bottom portions of the first and second compartments for fluid communication therebetween. | 09-03-2009 |
20090211262 | LNG TANK SHIP HAVING LNG CIRCULATING DEVICE - Disclosed is a liquefied natural gas storage apparatus. The apparatus includes a heat insulated tank and liquefied natural gas contained in the tank. The tank has heat insulation sufficient to maintain liquefied natural gas therein such that most of the liquefied natural gas stays in liquid. The contained liquefied natural gas has a vapor pressure from about 0.3 bar to about 2 bar. The apparatus further includes a safety valve configured to release a part of liquefied natural gas contained in the tank when a vapor pressure of liquefied natural gas within the tank becomes higher than a cut off pressure. The cut off pressure is from about 0.3 bar to about 2 bar. | 08-27-2009 |
20090199759 | STORAGE TANK CONTAINING LIQUEFIED NATURAL GAS WITH BUTANE - Disclosed is a liquefied natural gas composition. The composition contains methane, ethane and propane and butane. The composition contains a substantial amount of butane while being substantially free of hydrocarbon molecules larger than butane. | 08-13-2009 |
20090199591 | LIQUEFIED NATURAL GAS WITH BUTANE AND METHOD OF STORING AND PROCESSING THE SAME - Disclosed is a liquefied natural gas composition. The composition contains methane, ethane and propane and butane. The composition contains a substantial amount of butane while being substantially free of hydrocarbon molecules larger than butane. | 08-13-2009 |
20090173727 | Butt-joint Welding Method - A butt-joint welding method is disclosed, which is capable of improving welding productivity by reducing the number of welding passes by weaving a welding wire in submerged arc welding. The welding method includes arranging two parent metals having 10-35 mm thickness at an interval of 8-20 mm to face each other, attaching a backing material to rear sides of the two parent metals, the rear sides facing each other, so that the backing material seals a space between the parent metals through surface-contact with the rear sides, performing flux cored arc welding or compositely performing the flux cored arc welding and submerged arc welding 1-3 times on an upper layer of the backing material, and welding the two parent metals while weaving a submerged arc welding wire transversely. | 07-09-2009 |
20090133674 | FUEL GAS SUPPLY SYSTEM AND METHOD OF AN LNG CARRIER - A fuel gas supply system of a vessel, such as an LNG carrier, is provided for supplying fuel gas to a high-pressure gas injection engine of an LNG carrier, wherein LNG is extracted from an LNG storage tank of the LNG carrier, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. In one embodiment, the system includes a boil-off gas reliquefaction apparatus for reliquefying boil-off gas generated in the LNG tank. | 05-28-2009 |
20090126704 | FUEL GAS SUPPLY SYSTEM AND METHOD OF AN LNG CARRIER - A fuel gas supply system of a vessel, such as an LNG carrier, is provided for supplying fuel gas to a high-pressure gas injection engine of an LNG carrier, wherein LNG is extracted from an LNG storage tank of the LNG carrier, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. In one embodiment, the system is operated to supply fuel to an MEGI engine. | 05-21-2009 |
20080308175 | Method and Apparatus for Treating Boil-Off Gas in an LNG Carrier Having a Reliquefaction Plant, and LNG Carrier Having Said Apparatus for Treating Boil-Off Gas - Disclosed are a method and an apparatus for treating boil-off gas generated in an LNG storage tank of an LNG carrier for transporting LNG in a cryogenic liquid state, the LNG carrier having a boil-off gas reliquefaction plant, wherein an amount of boil-off gas corresponding to a treatment capacity of the reliquefaction plant among the total amount of boil-off gas generated during the voyage of the LNG carrier is discharged from the LNG storage tank and reliquefied by the reliquefaction plant. The boil-off gas treating method and apparatus can maintain an amount of boil-off gas discharged from an LNG storage tank at a constant level by storing in the LNG storage tank, instead of discharging and burning, surplus boil-off gas which has not been returned to the LNG storage tank through the reliquefaction plant among the total amount of boil-off gas generated in the LNG storage tank, and can prevent waste of boil-off gas and save energy by allowing an internal pressure of the LNG storage tank to be increased. | 12-18-2008 |
20080295527 | LNG TANK SHIP WITH NITROGEN GENERATOR AND METHOD OF OPERATING THE SAME - Disclosed is an apparatus for producing nitrogen equipped in a marine structure such as a liquefied natural gas regasification vessel (LNG RV) and a floating storage and regasification unit (FSRU), and a method for producing nitrogen in a marine structure using the apparatus. The apparatus for producing nitrogen equipped in a flowing marine structure produces nitrogen to be mixed with natural gas to be supplied to consumers after regasification. The floating marine structure in which the apparatus is equipped has an LNG regasification facility for compressing the LNG stored in a storage tank using a high-pressure pump and then vaporizing the LNG into natural gas in a vaporizer to supply natural gas to consumers. The apparatus for producing nitrogen secures cold heat necessary to produce nitrogen using the LNG supplied from the storage tank. | 12-04-2008 |
20080276628 | FUEL GAS SUPPLY SYSTEM AND METHOD OF AN LNG CARRIER - A fuel gas supply system of an LNG carrier is provided for supplying fuel gas to a high-pressure gas injection engine of an LNG carrier, wherein LNG is extracted from an LNG storage tank of the LNG carrier, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. | 11-13-2008 |
20080276627 | FUEL GAS SUPPLY SYSTEM AND METHOD OF A SHIP - A fuel gas supply system of a ship is provided for supplying fuel gas to a high-pressure gas injection engine of the ship, wherein the ship has an LNG fuel tank for storing LNG as fuel and LNG is extracted from an LNG fuel tank of the ship, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. | 11-13-2008 |
20080209908 | APPARATUS AND METHOD FOR LIQUEFIED NATURAL GAS CARRIER PROPULSION - Disclosed herein is an apparatus and method for liquefied natural gas (LNG) carrier propulsion. In the apparatus and method, the propulsion of an LNG carrier is done by only a single main diesel engine and has construction to promptly cope with emergencies caused by malfunction of the main diesel engine. The propulsion apparatus for an LNG carrier comprising a boil-off gas re-liquefaction apparatus for re-liquefying boil-off gas generated in LNG storage tanks to return re-liquefied boil-off gas back to the LNG storage tank comprises a single main diesel engine, a propulsion shaft separably connected to the main diesel engine, and an electric motor for propulsion separably connected to the propulsion shaft and supplied with power intended for operation of the boil-off gas re-liquefaction apparatus. | 09-04-2008 |