KR100461945B1 - A method to close large opening located in the bottom of shuttle tanker like marine vessel - Google Patents

Abstract

In the present invention, the Shuttle Tanker using Submerged Turret Unloading has a large opening at the bottom, and does not seal the bottom opening even when the ship is operated again after loading or unloading. For the purpose of reducing the speed of the generated vessel, the ship operates in a closed state with a cone-shaped structure during voyage, and when loading or unloading, the cone is fixed to the side by using a winch on the deck and a stopper, and the submerged turret Submerged Turret Unloading relates to a method of making the coupling or operation smooth.

Description

A method to close large opening located in the bottom of shuttle tanker like marine vessel}

The present invention relates to a method for sealing a bottom opening in a shuttle tank having an opening at the bottom of a ship, and more particularly, to operate in a sealed state with a cone-shaped structure during voyage, and during decking or unloading A method of fixing the cone to the side by using a winch, stopper, etc. to make submerged turret unloading coupling or operation smooth.

In general, marine vessels include pipeline laying vessels, cable laying vessels, crane vessels, worker dwelling vessels, supply vessels, towing vessels, and ships involved in the exploration, drilling, production, processing, storage and transportation of offshore oil. All vessels such as various barges.

Maintaining the position is most important because the oil-collecting vessels in drilling vessels or boreholes have pipes inserted from the hull undersea.

Automated methods are used to hold multiple anchors and maintain one position by the equilibrium between the tensions on the anchor cables, or to place multiple propellers in the blue or wind so that the propellers are automatically activated and returned to their original positions. . Such a device is called a dynamic positioning system. Although all ships have their own special machinery for the purpose of their work, the general conditions are that they must be able to work under harsh weather conditions: high waves, fast currents, strong winds and cold weather. This is due to the fact that there are many drilling and production activities in the North Sea oil field. Turret Mooring, such as Floating Production and Storage Off-loading (FPSO), where the ship is not moving too much and only needs to be centered around a single point of rotation to dampen the effects of algae or wind. Write the device.

In other words, a hole penetrating the up and down of the ship, and inserting a burrow called a turret in the hole and then hanging several anchors in the bottom of the turret (Turret).

On the other hand, when finished using the shuttle tank after loading or unloading, the bottom opening is currently operating without sealing, in spite of the degradation of the ship as described above, the effective method has not been presented.

The present invention relates to a method for sealing a bottom opening in a shuttle tank having an opening at the bottom of a ship, and to reduce the speed of the ship by effectively sealing the bottom opening.

In order to achieve the object described above, in a shuttle tanker with a large opening at the bottom of the ship, the clamp is released, the first stopper is released and the first winch is released little by little until the cone weighs the second line. When all loads are applied to the 2nd line, loosen all the 1st line in the 1st winch, lift the cone to the rear side of the ship using the 2nd winch, remove the 1st line and remove the cone which binds the buoy to the hull. Steps;

After descending the first line consisting of a sandbag, clasp dismantling device and two buoys from the bottom from the first winch, when the first line reaches the appropriate depth, the clasp disengaging device operates and the sandbag falls off and the buoyancy of the buoy is lowered. The first line floats on the surface of the water, and the first line floated on the surface of the water is lifted up to the deck of the hull using a hook, and then connected to a submerged turret unloading unit using a shooting gun or a hook. Pull the buoy up to the deck, then join the pick-up line (the line connected to the buoy floating on the surface), that is, the submerged turret unloading and the buoy connected to the submerged turret unloading unit, Submerged Turret Unloading After Lifting Submerged Turret Unloading Unit Through First Winch loading) Submerged Turret Unloading connection step of fixing using the clamp 30 when the unit is completed in the opening;

While holding the submerged turret unloading unit with the first winch, release the clamp and the first stopper to slowly lower the submerged turret unloading unit, and the submerged turret unloading unit. Disconnecting the submerged turret unloading (Submerged Turret Unloading) disconnecting the first line when the unit unloading (Submerged Turret Unloading);

As shown in the submerged turret unloading connection step, the first line is lowered, the first line is connected to the first line, which is the buoy line of the cone, and then pulled up to the first winch to confirm the mounting of the cone. It provides a sealing method of the bottom opening, characterized in that it comprises a reconnecting the cone fixed by the clamp.

1 is a view schematically showing a structure in which the opening of the hull is sealed with a cone when operating as a shuttle tanker.

2A, 2B, 2C, and 2D show a cone removal step by process;

3A, 3B, and 3C are diagrams illustrating a submerged turret unloading connection step by process;

4A and 4B illustrate a process of disconnecting a submerged turret unloading step by step;

5a and 5b show the cone reconnection step by step;

<Brief description of symbols for the main parts of the drawings>

10: first stopper 20: second stopper

30: clamp 40: first winch

50: second winch 60: first line

70: second line 80: cone

90: opening 100: buoy

105: punching bag 110: latch dismantling device

130: Submerged Turret Unloading Unit

The present invention relates to a method for sealing a bottom opening in a shuttle tank having an opening at the bottom of a ship, and more particularly, to operate in a sealed state with a cone-shaped structure during voyage, and during decking or unloading A method of fixing the cone to the side by using a winch, stopper, etc. to make submerged turret unloading coupling or operation smooth.

Hereinafter, a configuration and a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is divided into four stages, firstly, the cone removing step (FIGS. 2A, 2B, 2C, 2D) and the submerged turret unloading connection step (FIGS. 3A, 3B, 3C), and the sub Submerged Turret Unloading can be divided into disconnection steps (FIGS. 4A and 4B) and cone reconnection steps (FIGS. 5A and 5B).

The bottom opening is shown in FIG. 1 attached when operating as a shuttle tanker, the opening 90 of the bottom with a cone 80 fixed using stoppers 10 and 20 on the main deck and a clamp 30 of the opening. Is a sealed structure.

In the first step, the cone removal step, as shown in FIG. 2A, first, the clamp 30 is released and the first stopper 10 is released. Then, the first winch 40 is loosened little by little until the weight of the cone 80 is applied to the second line 70. At this time, the cone 80 is set downward so that the weight is slightly larger than the buoyancy is to go down. As shown in FIG. 2B, when all loads are applied to the second line 70, the first line 60 in the first winch 40 is released. Next, the cone 80 is lifted to the rear side of the ship using the second winch 50. As shown in FIG. 2C, two buoys 100 are provided on the first line 60 to be located on the water surface. Then, using the shooting gun or hook from the deck of the hull, the buoy (100) connected to the cone (80) is rolled up. Finally, as shown in Figure 2d, by lifting the buoy 100, using a stopper or other equipment to bind the buoy 100 to the hull to finish the cone removal.

Submerged Turret Unloading (Second Step) is a three-step process. First, as shown in FIG. 3A, the sandbag 105 and the latch are disassembled from the bottom from the first winch 40. The device 110, the first line 60 consisting of two buoys 100, is lowered. Next, as shown in FIG. 3B, when the first line 60 reaches an appropriate depth, that is, when the water pressure at a certain depth is measured, the sandbag 105 fastened to the bottom at the already set water pressure is opened. As the clasp disassembly device 110 acts to release, the sandbag 105 falls off and the buoyancy force of the buoy 100 causes the first line 60 to float to the surface. That is, the submerged turret unloading ( 130 is used for mooring ships at sea and for unloading cargo (cargo transport lines). To achieve this purpose, the submerged turret unloading 130 must be inserted into and secured to the bottom opening 90. . Checking the position of the submerged turret unloading 90 in the water and connecting it with the first winch 40 is essential for this reason and the process of FIGS. 3A, 3B and 3C explains this process well in detail. Specifically, the role of the sandbag 105 serves to send the buoy 100 down to the sea floor by the weight of the sandbag 105, and the latch is automatically released when the desired depth reaches the desired depth. ) Is separated from buoy 100. Therefore, the sandbag 105 sinks to the sea floor and the buoy 100 rises to sea level by its buoyancy. The buoy 100 floated on the sea surface is pulled up to the deck using a shooting gun or hook and connected to the buoy 100 of the submerged turret unloading 130, and the submerging using the first winch 40. The turret unloading 130 is coupled to the bottom opening 90. Then, the first line 60 floated on the water surface is hooked up to the deck of the hull using a hook, and as shown in FIG. Using a gun or hook, the buoy connected to the Submerged Turret Unloading unit 130 is pulled up to the deck, coupled to the deck, and submerged turret unloading through the first winch 40 After lifting the Turret Unloading unit 130, when the Submerged Turret Unloading unit 130 is completed to the opening 90, the submerged turret is fixed by using the clamp 30. Unloading (Submerged Turret Unloading ) The connection step is completed.

Submerged Turret Unloading disconnection step is holding the Submerged Turret Unloading unit 130 with the first winch 40, as shown in Figure 4a When the clamp 30 and the first stopper 10 are released, the submerged turret unloading unit 130 begins to descend slowly and as shown in FIG. 4B, the submerged turret unloading. (Submerged Turret Unloading) When the unit 130 comes to an intermediate point, the first line 60 is released, thereby ending the submerged turret unloading disconnection step.

In addition, the cone reconnecting step is lowered as shown in FIG. 5A, as shown in FIG. 5B, and the first line 60 is lowered as shown in the submerged turret unloading connection step. After connecting the first line 60, which is the buoy line, pulls it up to the first winch 40 and confirms the mounting of the cone 80, and then secures it with the clamp 30. It is not necessary to fix the side to the side, but the cone 80 must be removed from the bottom opening 90 and placed in another place so that the submerged turret unloading 130 can be inserted into the bottom opening 90. It is preferable to position the cone 80 well on the ship side so that the 80 may be located on the ship side or as long as it can be positioned or fixed to the ship deck using a crane or the like on the ship deck.

As described above, the Shuttle Tanker using Submerged Turret Unloading has a large opening at the bottom, and the bottom opening can be closed even when the ship is operated again after loading or unloading. As a result, it is possible to reduce the speed reduction of the vessel, and as a result, it is possible to prevent the increase of fuel loss and the required power, and thus it is possible to operate economically.

Claims (1)

In a shuttle tanker with a large opening at the bottom of the ship, the first winch 40 is released until the weight of the cone 80 is fully caught on the second line 70 after the clamp 30 is released and the first stopper 10 is released. Loosen a little by little and loosen all the first line 60 in the first winch 40 when all the load is applied to the second line 70 and then the cone 80 by using the second winch 50 side When lifted to the rear of the first line 60, there are two buoys (100) located on the surface of the water, and using the shooting gun or hook from the deck of the hull, the buoys (100) connected to the cone (80) is rolled up And after removing the cone to bind the buoy 100 to the hull using equipment such as a stopper; After descending the first line 60 consisting of the sandbag 105, the latch disassembly device 110, and two buoys 100 from the bottom of the first winch 40, the first line 60 When the proper depth is reached, the sand bag 105 is dropped while the latch disassembly device 110 is operated, and the first line 60 floats on the water due to the buoyancy force of the buoy 100, and the first line 60 floats on the water surface. To the deck of the hull using a hook, using a shooting gun or hook to pull the buoy connected to the Submerged Turret Unloading unit 130 to the deck, and then coupled to the deck and the first winch After the submerged turret unloading unit 130 is lifted through the 40 and the submerged turret unloading unit 130 is completed to the opening 90, the submerged turret unloading unit 130 is completed. Submerged turret unloading to be fixed using the clamp 30 (Su bmerged Turret Unloading) connection step; Submerged Turret Unloading by releasing the clamp 30 and the first stopper 10 while holding the Submerged Turret Unloading unit 130 with the first winch 40. Submerged Turret Unloading The Submerged Turret Unloading The Submerged Turret Unloading When the Unit 130 Comes to a Certain Point, the Submerged Turret Unloading A) disconnection step; As in the submerged turret unloading connection step, the first line 60 is lowered and the first line 60 is connected to the first line 60 which is the buoy line of the cone 80. After pulling up to the first winch (40) and confirming the mounting of the cone (80), the method of sealing the bottom opening, characterized in that it comprises a reconnection step of fixing with a clamp (30).