JP6361914B2 - Floating offshore facility, propulsion structure, and floating offshore facility propulsion method - Google Patents

Description

  The present invention relates to a floating offshore facility, a propulsion structure, and a propulsion method for a floating offshore facility. More specifically, the space in an engine room can be significantly reduced, and production as an offshore facility can be performed. The present invention relates to a floating offshore facility, a propulsion structure, and a propulsion method for a floating offshore facility that can significantly increase the space for storage facilities.

  FPSO (floating production storage and loading equipment) equipped with oil and gas production facilities and kept at a specific offshore installation location for a long period of time, FSO (floating bodies) without oil and gas production facilities Floating offshore facilities such as floating storage and loading facilities), FSU (floating storage facilities), and FLNG (liquefied storage and loading facilities) that handle LNG float while being held in place by mooring or automatic position holding devices, etc. In this state, production activities and products are temporarily stored.

  The construction of these offshore facilities is mainly done by remodeling existing VLCCs (large tankers), but recently there have been cases where new offshore facilities have been built. The case is also designed and built on the basis of the VLCC design.

  Therefore, the propulsion engine is mounted in the engine room of the floating offshore facility in the same manner as the VLCC. As a result, as shown in FIG. 5, propulsion engine-related equipment such as the main engine 30 occupies most of the engine room 10X, but this propulsion function is only used when moving from the factory or port to the oil field. It is not used and is not required during operation of the floating offshore facility 1X. For this reason, there is a problem that the space (shaded hatched portion) of the engine room 10X is largely taken up by equipment related to the propulsion engine that is not used during operation, and this portion is not effectively used.

  On the other hand, the main thruster is equipped with a swivel thruster that is placed on the stern and can be swung by swivel drive means placed on the platform, and the propeller is swirled by the electric drive means to change the traveling direction of the ship. The ship to change is proposed (for example, refer to patent documents 1). A propulsion structure called an azimuth thruster, in which a propeller is mounted on a pod that rotates in the horizontal direction, has been proposed, and a ship without a stern rudder has been put into practical use.

  Further, in a small vessel such as a fishing boat, a propulsion unit in which a main engine called an outboard motor and an auxiliary machine, a power transmission system such as a gear mechanism, a clutch, and a transmission shaft, a screw propeller, and the like are integrated is used. In many cases, this outboard motor functions as a rudder by turning the entire outboard motor in the horizontal direction. The outer unit can be lifted up to avoid obstacles.

  A ship equipped with this outboard motor is normally operated with the outboard motor installed, and remains attached to the ship except during maintenance and inspection, and can be operated with such an outboard motor. Also limited to small vessels.

Japanese Utility Model Publication No. 06-8190

  In view of the above situation, the present inventor detachably provides a propulsion structure having a propulsion device such as an outboard motor to a floating offshore facility that does not require a propulsion function during operation. When the propulsion structure is attached to a floating offshore facility only during navigation, and this propulsion structure, which is not required during operation, can be used for another floating offshore facility, By moving equipment from the engine room to the propulsion structure and using a power drive source such as a boiler or generator that is necessary during operation but not required during navigation, We obtained knowledge that both the size and the size of the propulsion structure can be reduced and that the equipment can be used efficiently.

  An object of the present invention is to use a propulsion device that is used in a floating-type offshore facility from a factory or a port to an offshore installation site, but that is unnecessary when operating on the ocean. A floating offshore facility, a propulsion structure, and a propulsion method for a floating offshore facility that can significantly reduce the space for production and storage as offshore facilities. It is to provide.

The floating offshore facility of the present invention for achieving the above object is a floating offshore facility that is used while being held on the ocean and does not require a propulsion function during operation . is configured with a stern portion capable of mounting a propulsion structure stern, the propulsion structure includes a propulsion unit while detachably attached to the floating offshore facilities, the floating offshore said propulsion device It is configured to be driven by a power drive source for the floating offshore facility disposed in the facility, and the propulsion structure is attached when navigating and is removed when operating offshore .

  Unlike the outboard motor used in a small vessel, this propulsion structure does not have a power drive source (power generation device) that drives the propulsion device, and the floating body to which the propulsion structure is mounted The propulsion device is driven using a power drive source provided in the offshore facility.

  According to this configuration, in a floating offshore facility, a propulsion main engine, an accompanying cooling pump, a heat exchanger, an oil purifier and other auxiliary machines, and a main engine opening overhead crane for maintaining and inspecting the main engine And the like, the space in the engine room of the floating offshore facility can be greatly reduced, and the space for production and storage can be significantly increased.

  Also, as a power drive source for propulsion devices such as propellers provided in the detachable propulsion structure, power drive for existing equipment such as boilers and generators that are installed in floating offshore facilities By utilizing the power source, the power drive source in the propulsion structure can be omitted, so that the configuration of the propulsion structure can be simplified and downsized.

  In the above floating offshore facility, when the power drive source for the floating offshore facility is a boiler, steam generated in the boiler is used to convert a steam turbine or steam provided in the propulsion structure. Floating offshore facilities can be operated by driving the propulsion device with the generator and motor used.

  In floating offshore facilities, steam is installed in the engine room and used on the upper deck for supplying steam for shipboard, and steam used for processing crude oil and natural gas at production facilities. In many cases, an upper deck boiler is provided to supply the engine, and the production facility is not in operation while the propulsion unit is in operation. Therefore, the propulsion unit for the propulsion structure is generated by the steam generated in these boilers. Can be driven easily.

The propulsion structure for floating offshore facilities for achieving the above object, used is position holding at sea, detachably attached to the need and Do that floating offshore facilities forwarding function during operation The propulsion structure is configured to drive a propulsion device disposed in the propulsion structure with a power drive source disposed in the floating offshore facility.

  According to this configuration, in the propulsion structure, the power drive source of the floating offshore facility is used as the power drive source of the propulsion device of the propulsion structure that is detachably mounted. The power drive source can be omitted, and the structure of the propulsion structure can be simplified and downsized.

  In addition, in the floating offshore facilities, the main engine for propulsion and the accompanying auxiliary machines, overhead cranes for opening the main engine, etc. are no longer required, and the space in the engine room of the floating offshore facilities can be greatly reduced. And the storage space for storage can be significantly increased.

  In the propulsion structure described above, when the power drive source for the floating offshore facility is a boiler, and configured to drive the propulsion device with steam generated in the boiler, the inboard use provided in the engine room Steam turbines and steam generators installed in propulsion structures using steam generated in engine room boilers for steam supply, upper deck boilers for steam supply for processing crude oil and natural gas, etc. And the propulsion device can be driven by an electric motor or the like to operate floating offshore facilities.

  Floating offshore facilities often have engine room boilers and upper deck boilers, and the production facilities are not in operation during operation to drive the propulsion unit. The propulsion device of the propulsion structure can be easily driven.

And the propulsion method of the floating offshore facility for achieving the above-mentioned object is a floating offshore facility propulsion method that is used while being held on the ocean and does not require a propulsion function during operation. A propulsion structure that is configured to be detachable and equipped with a propulsion device is mounted on the stern of the hull during navigation of the floating offshore facility , and the propulsion device is disposed on the floating offshore facility. It is a method characterized in that it is driven by a power drive source to operate the floating offshore facility, and the propulsion structure is removed during offshore operation .

  According to this method, the same structure for propulsion can be used for other floating offshore facilities by attaching the propulsion structure to the newly constructed floating offshore facility at the time of navigation and removing it when operating offshore. This allows one propulsion structure to be used for moving several floating offshore facilities. Therefore, a new floating offshore facility can be constructed at a low cost.

  According to the floating offshore facility, the propulsion structure, and the propulsion method of the floating offshore facility of the present invention, the floating offshore facility is used in a voyage from a manufacturing site or a port to an offshore installation location. By omitting the equipment for the propulsion device that is not required when it is in operation from the engine room, the main engine for propulsion, the accompanying auxiliary equipment, the overhead crane for opening the main engine, etc. are not required, and the floating offshore facility engine The room space can be greatly reduced, and the space for production and storage as offshore facilities can be significantly increased.

  Also, as a power drive source for propulsion devices such as propellers provided in the detachable propulsion structure, power drive for existing equipment such as boilers and generators that are installed in floating offshore facilities By utilizing the power source, a power drive source can be omitted in the propulsion structure, and the configuration of the propulsion structure can be simplified and downsized.

  Furthermore, by attaching a propulsion structure to a newly constructed floating offshore facility at the time of navigation and removing it when operating offshore, the same propulsion structure can be diverted to other floating offshore facilities. As a result, one propulsion structure can be used to move several floating offshore facilities. Therefore, a new floating offshore facility can be constructed at a low cost.

FIG. 3 is a side view of the stern part schematically showing the configuration of the floating offshore facility and the configuration of the propulsion structure according to the embodiment of the present invention, and shows a state where the propulsion structure is mounted on the floating offshore facility. . It is a side view of the stern part which shows typically the state where the structure for a propulsion was attached to floating body type offshore equipment. It is a side view of the stern part which shows typically the composition which drives the propeller of the structure for a propulsion with the steam generated in the boiler of a floating type offshore installation. It is a side view of the stern part which shows typically the composition which drives the propeller of the structure for propulsion with the electricity generated with the generator of a floating type offshore installation. It is a side view which shows typically the structure of the floating body type offshore installation in a prior art.

  Hereinafter, a floating offshore facility, a propulsion structure, and a propulsion method for a floating offshore facility according to embodiments of the present invention will be described with reference to the drawings. As the floating offshore facility of this embodiment, an FPSO (floating body production storage and loading facility) will be described as an example. However, the present invention is not limited to this FPSO, and the propulsion device is used when navigating offshore. If it is a floating offshore facility that does not require a propulsion device during operation on the ocean, it can be applied.

  For example, FSO (floating storage and loading facility), FSU (floating storage facility), FLNG (liquefied storage and loading facility: LNG-FPSO) that handles LNG, FLPG that handles LPG (oil and gas production facilities) The present invention can also be applied to LPG-FPSO), FSRU (floating body storage regasification facility), and the like.

  In general, the floating offshore facility 1 such as FPSO has almost the same shape as a vessel such as VLCC, so here, the names of the respective parts are the same as those of the vessel such as VLCC. ”,“ Stern ”,“ upper deck ”, etc.

  As shown in FIGS. 1 to 4, the floating offshore facility 1 of this embodiment has substantially the same shape as a ship such as a VLCC, and is automatically installed from a manufacturing site or port to an offshore installation site such as an oil field. It moves by voyage and is used in a state where it is held on the ocean at this offshore installation location by a mooring system or automatic position holding system.

  The floating offshore facility 1 includes a stern part 3 on which a propulsion structure 20 can be mounted on the stern of a hull 2 and an engine room 10 on the front side thereof. The engine room 10 is provided with an engine room boiler 11 and an engine room generator 12 that generate steam for inboard use. On the upper deck 4 of the hull 2, an upper deck boiler 13 and an upper deck generator 14 that generate steam for processing crude oil or natural gas in a production facility (not shown) are arranged. Further, an upper structure 5 having a bridge, a residential area, and the like is provided on the upper deck 4, and a chimney 10 a is provided above the engine room 10.

  Further, as shown in FIG. 1, the propulsion structure 20 is fitted into a concave stern portion 3 from the stern side to the bow side of the floating offshore facility 1 during operation of the floating offshore facility 1. It is configured to be mounted on the floating offshore facility 1. When the operation of the floating offshore facility 1 is completed, the propulsion structure 20 moves from the bow side to the stern side and is separated from the stern portion 3 as shown in FIG. This separation may be performed using a crane ship, or may be performed by engaging the propulsion structure 20 with a third floating body (not shown). In other words, in the present invention, in the floating offshore facility 1, the propulsion structure 20 including the propeller 21 as a propulsion device is configured to be detachable from the floating offshore facility 1.

  The propulsion structure 20 includes a propeller 21 serving as a propulsion device at a lower portion, a rotating machine 22 that rotates the propeller 21 at an upper portion, and a rotating shaft 22 a of the rotating machine 22 and a propeller between the rotating machine 22 and the propeller 21. A gear mechanism 23 that bends the axial direction of rotation from the vertical direction to the substantially horizontal direction is provided between the rotary shaft 21a and the rotary shaft 21a.

  Furthermore, the marine vessel maneuvering device 24 that turns the propeller 21 in the horizontal direction together with the rotating machine 22 is provided. When the propeller 21 is rotated and sailed, the rotation shaft 21a of the propeller 21 is turned in the horizontal direction. The floating offshore facility 1 that is self-propelled is configured to be operated. With respect to this ship maneuvering, instead of the configuration in which the entire rotating machine 22 is turned, a propeller 21 may be provided on a turning pod such as an azimuth thruster so that only the pod is turned.

  In the present invention, the engine room is a power drive source for the floating offshore facility 1 disposed in the floating offshore facility 1 as a power drive source of the rotating machine 22 that rotationally drives the propeller 21 that is a propulsion device. The boiler 11, the engine indoor generator 12, the upper deck boiler 13, or the upper deck generator 14 are configured to be driven by any one or some combination.

  That is, in this propulsion structure 20, unlike an outboard motor used in a small boat, the propulsion structure 20 does not have a power drive source (power generation device) for driving the propeller 21 itself. Is either an engine indoor boiler 11, an engine indoor generator 12, an upper deck boiler 13 or an upper deck generator 14 which is a power drive source provided in the floating offshore facility 1 to which Several combinations are used to drive the propeller 21.

  For example, as shown in FIG. 3, the rotating machine 22 is constituted by a steam turbine, and one of steam generated in the upper deck boiler 13 and steam generated in the engine indoor boiler 11 using the steam pipe 15 in the steam turbine. Or both (both in FIG. 3) are supplied. Thereby, the propeller 21 is driven by the steam turbine provided in the propulsion structure 20 using the steam generated in either one or both of the engine room boiler 11 and the upper deck boiler 13, so that the floating offshore facility 1 is installed. Can operate in self-propelled condition. Since the production facility is not in operation during the operation of driving the propeller 21, the propeller 21 of the propulsion structure 20 is generated by steam generated in one or both of the engine room boiler 11 and the upper deck boiler 13. Can be driven easily.

  Alternatively, as shown in FIG. 4, the rotating machine 22 is configured by an electric motor (motor), and one or both of the electricity generated in the engine indoor generator 12 and the electricity generated in the upper deck generator 14 ( Both in FIG. 4 are supplied using the power line 16.

  According to the above configuration, the floating offshore facility 1 used while being held on the ocean is configured such that the propulsion structure 20 including the propeller (propulsion device) 21 is detachable from the floating offshore facility 1. The propeller 21 is arranged in the floating offshore facility 1 or any one or several of the engine indoor boiler 11, the engine indoor generator 12, the upper deck boiler 13, and the upper deck generator 14 for the floating offshore facility 1. It can be driven by a combination of

  Further, according to the above configuration, the propulsion structure 20 for the floating offshore facility 1 is configured to be detachable from the floating offshore facility 1 that is used while being held on the ocean. A propeller 21 arranged in the propulsion structure 20 by any one or some combination of the engine room boiler 11, the engine room generator 12, the upper deck boiler 13 and the upper deck generator 14 arranged in Is configured to drive.

  And the propulsion method of the floating offshore facility according to the embodiment of the present invention is a propulsion method of the floating offshore facility 1 that is used while being held on the ocean, and is configured to be detachable from the floating offshore facility 1, and The propulsion structure 20 provided with the propeller 21 is mounted on the floating offshore facility 1, and the engine indoor boiler 11, the engine indoor generator 12, and the upper deck on which the propeller 21 is disposed on the floating offshore facility 1. This is a method of operating the floating offshore facility 1 by driving with any one or some combination of the boiler 13 and the upper deck generator 14.

  According to the floating offshore facility 1, the propulsion structure 20, and the propulsion method of the floating offshore facility of the above embodiment, in the floating offshore facility 1, the main engine for propulsion, the accompanying cooling pump, the heat Auxiliary machines such as exchangers and oil purifiers, and overhead cranes for opening the main engine for maintenance and inspection of the main engine are no longer required, and the space in the engine room 10 of the floating offshore facility 1 can be greatly reduced. The space for production and storage can be significantly increased. For example, in contrast to the prior art engine room 10X shown in FIG. 5, the hatched hatched space in the engine room 10 of the floating offshore facility 1 of this embodiment can be used effectively as shown in FIG. .

  Moreover, as a power drive source of the propeller 21 of the propulsion structure 20 that is detachably mounted, existing boilers 11 and 13 and generators 12 and 14 that are arranged in the floating offshore facility 1 are used. By utilizing such a power drive source, the power drive source can be omitted in the propulsion structure 20, and the configuration of the propulsion structure 20 can be simplified and downsized.

  Further, by attaching the propulsion structure 20 to the newly constructed floating offshore facility 1 at the time of navigation and removing it when operating offshore, the same propulsion structure 20 can be diverted to other floating offshore facilities 1. Accordingly, one propulsion structure 20 can be used for moving several floating offshore facilities 1. Therefore, the new floating offshore facility 1 can be constructed at a low cost.

  According to the floating offshore facility of the present invention, the structure for propulsion, and the propulsion method of the floating offshore facility, the floating offshore facility is used from the manufacturing site and the port to the offshore installation location, but operates on the ocean. When unnecessary, the unnecessary propulsion device can be omitted from the engine room, the space in the engine room can be greatly reduced, and the space for production and storage as offshore equipment can be significantly increased, It can be used for many floating offshore facilities.

DESCRIPTION OF SYMBOLS 1, 1X Floating type offshore equipment 2 Hull 3 Stern part 4 Upper deck 5 Upper structure 10, 10X Engine room 10a Chimney 11 Engine room boiler 12 Engine room generator 13 Upper deck boiler 14 Upper deck generator 15 Steam piping 16 Power line 20 Propulsion structure 21 Propeller (propulsion device)
22 Rotating machine 22a Rotating machine rotating shaft 21a Propeller rotating shaft 23 Gear mechanism 24 Maneuvering equipment 30 Main engine

Claims (5)

A floating offshore facility that is used while being held on the ocean and does not require a propulsion function during operation . the propulsion structure includes a propulsion unit while detachably attached to the floating offshore facility, driving the propulsion device by the power drive source of the floating offshore facilities disposed on the floating offshore facilities A floating offshore facility characterized in that the propulsion structure is attached during navigation and is removed when operating offshore.   The floating offshore facility according to claim 1, wherein the power drive source for the floating offshore facility is a boiler. Is used held in place at sea, a propellant structure promoting function is detachably attached to the need and Do that floating offshore facility during operation, by the power drive source is arranged on the floating offshore facilities A propulsion structure characterized in that the propulsion device arranged in the propulsion structure is driven.   The propulsion structure according to claim 3, wherein the power drive source for the floating offshore facility is a boiler, and the propulsion device is driven by steam generated in the boiler. In a propulsion method for a floating offshore facility that is used while being held on the ocean and does not require a propulsion function during operation, a propulsion structure that is configured to be detachable from the floating offshore facility and includes a propulsion device is provided. Attach to the stern of the hull during navigation of the floating offshore facility, drive the propulsion device with a power drive source disposed on the floating offshore facility, operate the floating offshore facility, and A method for propelling a floating offshore facility, wherein the structural body is removed during offshore operation .

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