KR101324118B1 - Ice management method using vessel with caisson pipe - Google Patents

Abstract

Disclosed is a method of managing drift ice using a vessel provided with a caisson pipe.
An drift ice management method using a vessel provided with a caisson pipe according to an embodiment of the present invention includes a first step of anchoring a first vessel to a first plant anchor disposed on the sea floor for mooring of an offshore plant to be supported by marine operations; And anchoring the second vessel to the first plant anchor or the second plant anchor in the same manner as anchoring the first vessel, and supporting the first plant anchor or the second plant anchor. Thus, at least one of the first vessel and the second vessel includes a third step of moving or crushing the drift ice.

Description

Ice management method using vessel with caisson pipe {ICE MANAGEMENT METHOD USING VESSEL WITH CAISSON PIPE}

The present invention relates to an drift ice management method using a vessel provided with a caisson pipe, and more particularly, to a drift ice management method using a vessel provided with a caisson pipe for supporting work of a deep sea offshore structure or an offshore plant.

In general, the offshore plant may correspond to various offshore facilities used for mining, producing and transporting oil or natural gas.

These offshore plants have facilities for generating offshore energy (eg tidal power, wave power, wind energy, etc.), including drillships or drilling facilities (rig, semi-rig, jack up-rig), FPSO, etc. , Large ship safety facilities, marine observation facilities, deep-sea resource development plants such as manganese nodules, marine facilities for deep water development, marine leisure facilities such as marine hotels, hate facilities such as marine incinerators and crematoriums, marine airports or marine plants, marine exploration A wide variety of equipment can be included, including facilities and floating offshore structures.

Recently, orders for deep-sea structures have increased due to the importance and depletion of energy resources, and additional orders for offshore work support ships are increasing. Due to the characteristics of offshore work support ships, compact, light weight, and versatility are needed.

The deep sea installation ship disclosed in the following patent document, which is the background of the invention, provides an upper work deck and a lower work deck, installs anchor chains, wires, ropes, and the like on the lower work deck, and installs the upper work deck and the lower work deck. The main crane to cover is provided.

In addition, the marine work support line 1 as shown in FIG. 1 may be in the form of a platform supply vessel (PSV), anchor handling tug supply (AHTS), or the like.

Ships such as offshore operations support ships (1) load cargo such as anchors (2) on the work deck and carry, unload or drop cargo to the anchoring point, or, in the case of a rig, an offshore plant, In order to prevent the leg from freezing by ice floe or drift ice or ice field (hereinafter referred to as `` drift ice ''), it is responsible for breaking or pushing drift ice.

In addition, ships such as AHTS are designed to receive, ie, handle, anchor offshore plants through the stern of the ship.

However, in order to handle anchors of offshore plants installed in the polar region, there are limitations in handling to the stern part of the ship due to drift ice.

For example, when the ship moves in the state of loading the end of the anchor chain (3) connected from the offshore plant and the anchor (2) connected to the end of the anchor chain (3), as shown in Figure 1 Due to the anchor chain 3, the operator may be in a very dangerous situation, and an unexpected accident may occur due to interference with drift ice around the ship.

In addition, when dragging and moving the anchor chain (3), the force in the form of pressing the top of the stern portion of the anchor chain 3 acts, there is a disadvantage that the ship stability may be relatively low.

In addition, conventional vessels such as AHTS also play a role of drift ice management that breaks or pushes drift ice, but a ship anchor provided on the vessel itself is manufactured to fit the vessel size, so that a relatively small size is compared with a plant anchor of an offshore plant. Since it has a support force by the anchor provided in the ship itself, it has a disadvantage that is not enough to handle the drift ice relatively large than the size of the hull.

In addition, a conventional ship such as AHTS has a limited braking horsepower (BHP), so when the drift ice or ice floes relatively larger than the size of the ship approaches the offshore plant, the drift ice cannot be managed only by the propulsion power of the ship. Have

Patent Registration No. 10-1047978

An embodiment of the present invention is to solve the above-mentioned problems, provides a method of managing drift ice using a vessel having a caisson pipe for supporting marine operations through a messenger buoy using a caisson pipe and compressed air. I would like to.

According to an aspect of the present invention, the upper deck is provided on the upper portion of the vessel for supporting marine operations, at least one caisson pipe in the drift ice management method using a vessel having a hull provided through the upper deck and the bottom surface, the The first vessel anchoring the first vessel to the first plant anchor disposed on the seabed for the mooring of the offshore plant that is the target of offshore operations of the vessel, and the second vessel through the same method as the anchoring of the first vessel A second step of anchoring to a first plant anchor or a second plant anchor, and at least one of the first vessel and the second vessel, based on the first plant anchor or the second plant anchor, moves or shreds the drift ice. Drift ice management method using a vessel having a caisson pipe comprising a third step may be provided.

In the first step, the first vessel is approaching the anchor anchor buoy for the plant anchor disposed on the seabed for the mooring of the offshore plant, the object of the offshore work support, and the messenger buoy provided in the first vessel the caisson The first and second steps of descending to the bottom of the first vessel and floating on the surface of the first vessel through the pipe; and the first and third steps of connecting the messenger buoy and the anchor buoy, the messenger buoy and the anchor buoy connected to each other. Steps 1-4 through which the caisson pipe is pulled up onto the upper deck of the first ship, and First-connecting the chaser of the anchor chain connected to the anchor buoy raised along the anchor buoy to the main winch of the first ship Step 5 and step 1-6 to anchor the first vessel in a state supported by the anchor chain and the plant anchor connected to the chaser; .

In addition, in the first and second steps, water is filled into the messenger buoy through the water inlet of the messenger buoy from the water supply device provided in the first vessel, and the messenger buoy filled with the water By self-weight, the messenger buoy may be moved through the caisson pipe to reach the water below the bottom of the first ship.

In addition, when the messenger buoy moves through the caisson pipe, the main winch or sub winch installed in the first vessel may release and supply any one or more of a messenger wire and a compressed air hose connected to the messenger buoy.

The messenger buoy, which has reached the bottom of the bottom of the first ship, receives compressed air from the compressed air supply device provided in the first ship through the compressed air inlet, and supplies the water inside the messenger buoy. Instead of discharging, the compressed air may be filled into the messenger buoy to rise to the surface.

In addition, in the first to third steps, after hooking up the messenger buoy and the anchor buoy with a hook device in one place, a process of connecting the messenger buoy and the anchor buoy by a binding means may be performed.

In addition, in the first to third steps, the messenger buoy and the anchor buoy are individually pulled up to the upper deck by using the hook device or the main crane provided in the first vessel, and then the buoy connecting operation is performed on the upper deck. And a step of dropping the messenger buoy and the anchor buoy interconnected on the surface of the upper deck using the main crane.

In addition, in the first to fourth steps, the main winch and the sub winch installed in the first vessel wind and recover the messenger wire and the compressed air hose connected to the messenger buoy, thereby connecting the interconnected messenger buoy and the anchor buoy. A pulling process and a part of a lead line, a chaser, and an anchor chain connected to the anchor buoy together with the anchor buoy pulled up may be lifted toward the upper deck through the caisson pipe.

In addition, in the third step, at least one of the first vessel and the second vessel may block, break, or push the drift ice based on the first plant anchor or the second plant anchor.

In the third step, the first vessel supported or anchored to the first plant anchor prevents the drift ice, and the second vessel supported or anchored to the first plant anchor or the second plant anchor Approaching the drift ice may include the step of breaking the drift ice.

Embodiments of the present invention can be used to support marine operations in the ocean, including the polar region, can be carried by loading or loading the cargo on the upper deck where the loading and unloading of cargo, such as anchors, or handling the drift ice, upper deck and ship There is an effect that a vessel provided with one or more caisson pipes obliquely penetrating between bottoms is provided.

In addition, an embodiment of the present invention is for a ship having a caisson pipe, when moving through the caisson pipe in the state of storing water, when the water reaches the bottom of the bottom of the bottom receiving compressed air is supplied compressed air instead of discharged water There is an effect of providing a water or compressed air injection messenger buoy rising to the surface by charging.

In other words, the effect of providing the messenger buoy in more detail, the lead line (leaded line), messenger wire, anchor chain and the like connected to the anchor buoy through the caisson pipe, from the upper deck to the bottom of the ship bottom, or the bottom It can be moved or moved from the lower side to the upper deck, so that the anchor chain is not exposed to the outside of the water surface when moving in the anchored state, thereby preventing the operator's dangerous situation and preventing interference with the drift ice around the ship. It is effective to prevent accidents.

In addition, an embodiment of the present invention, after the messenger buoy rises to the surface, the connection work with another buoy of the offshore plant, such as anchor buoys can be easily made on the surface, accordingly, divers or remotely operated vehicles (ROV) There is an advantage that can work on the water surface or the upper deck of the ship without the underwater work.

In addition, an embodiment of the present invention provides a method for anchoring offshore plants using a vessel having a caisson pipe, thereby minimizing interference of drift ice by messenger buoys using a caisson pipe and compressed air, anchors connected to the anchor when transporting the anchor There is an effect that can solve the problems caused by the chain.

In addition, an embodiment of the present invention provides a method of anchoring a vessel with a caisson pipe, by anchoring the vessel with a caisson pipe using a solid support base, such as a plant anchor fixed to the seabed for offshore plants, There is an advantage in that the ship can be reliably anchored even under extreme conditions facing the ice floes floating offshore.

In addition, an embodiment of the present invention provides a method for managing drift ice using a vessel equipped with a caisson pipe, the vessel is anchored to the plant anchor anchored on the seabed and its anchor chain, and floated toward the offshore plant, or rather than the size of the vessel There is an advantage that the handling of ice floes can be efficiently handled or managed, such as blocking, breaking, or pushing relatively large ice floes without marine power or with minimal power.

1 is a side view of a marine operation support ship according to the prior art.
2 is a cross-sectional view of a vessel having a caisson pipe according to an embodiment of the present invention.
3 is a perspective view of a ship messenger buoy with a caisson pipe;
4 is a view showing the operating state of the vessel and the messenger buoy with a caisson pipe.
Figure 5 is a flow chart of the offshore plant anchoring method using a vessel having a caisson pipe.
6 to 14 are schematic views showing the offshore plant anchoring method shown in FIG.
15 is a flow chart of a method of anchoring a ship with caisson pipes.
FIG. 16 is a schematic view illustrating an anchoring method of a ship having a caisson pipe shown in FIG. 15.
17 is a flowchart of a method of managing drift ice using a vessel provided with a caisson pipe.
FIG. 18 is a schematic diagram illustrating a method of managing drift ice using a ship having a caisson pipe shown in FIG. 17.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, when it is determined that a detailed description of a related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted, and similar or identical reference numerals are used in the similar or identical configurations between the embodiments. Can be used.

In addition, in the description according to the present embodiment below, 'ship' may be understood as an abbreviation for a vessel in which a caisson pipe is installed on the hull.

The present embodiment is based on a vessel having a caisson pipe, a messenger buoy for a vessel having a caisson pipe, an offshore plant anchoring method using a vessel having a caisson pipe, an anchoring method of a vessel provided with a caisson pipe, a caisson pipe Disclosed a detailed device or method that can support the work of offshore plants installed in the polar regions, such as the method of managing drift ice using the equipped ships, to handle the anchors of offshore plants installed in the polar regions safely and easily, or to efficiently manage the drift ice. I would like to.

To this end, each device or method will be described in detail with reference to the accompanying drawings.

[ Caisson  Ship with pipe]

2 is a cross-sectional view of a vessel having a caisson pipe according to an embodiment of the present invention.

As shown in FIG. 2, a vessel 100 with a caisson pipe may have a linear shape that is the same as or similar to an offshore work support line.

For example, the vessel 100 is a drilling vessel, drilling equipment, FPSO, marine energy generation facilities, large ship safety facilities, marine observation facilities, deep sea resource development plants, deep sea water development marine facilities, marine hotels, marine leisure facilities, marine incinerators, crematory It can be used to support offshore operations of offshore plants, such as offshore airports, offshore plants, offshore exploration facilities and floating offshore structures.

The vessel 100 is provided with a residence port 111 in the upper portion thereof, an open deck or upper deck 113 for marine work is provided next to the residence port 111, one or more caisson pipes (114, 115) is provided It may have a hull 110 provided between the upper deck 113 and the bottom surface 116.

In addition, the ship 100 may include a propulsion apparatus having a plurality of side thrusters 120 mounted on the bow side of the hull 110 and an underwater pod 130 mounted on the stern side of the hull 110. have.

Since the propulsion device of the ship 100 may be various kinds of propulsion devices designed for propulsion and steering of the ship, such as a duct propeller, a water jet propulsion device, an azipod propeller, etc. It is not limited only to the thruster 120 and the underwater pod 130.

The propulsion device of the vessel 100 may be installed in the hull 110 to avoid the installation position or the penetration position of the caisson pipe (114, 115).

The penetrating diameters of the caisson pipes 114 and 115 are the size of the hull 110, the size of various buoys (e.g., messenger buoys, anchor buoys, etc.) to be used, anchor chain, wire, compressed air hose 172, main body The number of passages of various lines such as the wire 151 may be determined in consideration of the number of passes.

The caisson pipes 114 and 115 are straight passage structures or live passage structures, and may further include a plurality of reinforcing structures (not shown) outside the caisson pipes 114 and 115.

The edge of the upper hole corresponding to the opening of the upper deck 113 of each of the caisson pipes 114 and 115 or the edge of the lower hole corresponding to the opening of the bottom surface 116 is extended to facilitate entry and exit of various lines or buoys. The tubular bell mouse structure 117 may be formed.

When the arrangement structure in the hull 110 of the caisson pipes 114 and 115 is inclined along the bow direction or the stern direction of the hull 110, it is arranged in the upper and lower beam structure as shown in FIG. Although not shown in the figure, it may be arranged in a vertical light narrowing structure such as a V shape.

In addition, although the arrangement structure of the caisson pipes 114 and 115 in the hull 110 is not shown, when arranged inclined along the port direction or starboard direction along the width direction of the hull 110, the upper and lower beam structure or the upper and lower beam structure It may also be arranged.

In addition, the vessel 100 may include a facility crane 160 provided with a main crane 140 and a main winch 150 on the upper deck 113 around the caisson pipes 114 and 115.

At least one main winch 150 may be installed and used at an appropriate location (not shown) of the upper deck 113 that is inside the facility room 160 or outside the facility room 160.

Each main winch 150 is configured to be connected to or disconnected from the anchor chain, messenger wire 151, various ropes, cables, leads, chaser (chaser), etc. for offshore plants, unwinding or winding various connections Or standstill support.

In the present embodiment, the main winch 150 operates in response to a moving or stationary state of an object coupled to an end of a line-shaped connection such as an anchor chain, messenger wire, rope, cable, and lead line. As can be appreciated, a detailed description of the operation of the main winch 150 can be omitted.

In addition, in the case of the sub winch 183, the operation of the sub winch 183 unwinds and winds the compressed air hose 182 corresponding to the process of moving the compressed air hose 182 or the messenger buoy 170 connected thereto. As can also be understood in the art, a detailed description of the operation of the sub-winch 183 may be omitted.

Although not shown in the facility room 160, a hook that lifts one side buoy (for example, a messenger buoy) and the other buoy (for example, an anchor buoy for position identification of a plant anchor for offshore plant) and lifts it toward the upper deck 113 in support of offshore operations. Equipment or tools, such as a device or a corresponding lifting means, and a bundle means for tying the buoys together, may be further provided.

The messenger wire 151 connected to the main chamber winch 150 or the upper deck 113 in such a manner as to be attached to the main winch 150, and the end of the messenger wire 151, that is, the end of the messenger wire 151. There may be a messenger buoy 170 of a size that can be accessed through.

In addition, in the facility room 160 or the upper deck 113, a compressed air supply device 180 for providing compressed air in the messenger buoy 170, and water for providing water in the messenger buoy 170. Supply device 190 may be installed.

Here, the combination or installation position of the compressed air supply unit 180 and the water supply unit 190 may be installed inside or outside the hull 110 in consideration of the allowable range or the work efficiency, the device combination or installation position May not be limited.

In addition, the compressed air supply device 180 is an air compressor 181 for producing compressed air and storing it in a tank, and a compressed air hose 182 connected to the air compressor 181 to be a moving path of the compressed air; The air winch coupler 184 may be configured to wind and wind the compressed air hose 182 to a reel or bobbin, and an air injection coupler 184 coupled to the end of the compressed air hose 182.

The air injection coupler 184 maintains the clamping force at the compressed air inlet 174 (see FIG. 3) of the messenger buoy 170 under a predetermined pressure by using a friction force generated by the fitting or temporary fastening means. It may be configured to be separated from the compressed air inlet 174 of the messenger buoy 170 by receiving a back pressure above a predetermined pressure.

In addition, the water supply device 190 is a water tank 191 connected to the fresh water line of the vessel 100, a water supply pump 192 connected to the water tank 191 to receive water, and a water supply pump 192 It may be composed of a water injection gun (193) coupled to the end of the discharge line extending from) to become the water movement path.

The water injection gun 193 may serve to fill the messenger buoy 170 with water.

The messenger buoy 170 may be manufactured to move or sink underwater through the caisson pipes 114 and 115 by gravity by the water filled in the buoy using the water injection gun 193.

In addition, the messenger buoy 170 may be introduced into the water while being connected to the compressed air hose 182 and the air injection coupler 184. At this time, when the vessel 100 moves to the side and compressed air flows into the messenger buoy 170, the water filled in the messenger buoy 170 is discharged through the fluid outlet of the messenger buoy 170 by the compressed air. Can be.

In this case, as the inside of the messenger buoy 170 is replaced with compressed air, the buoyancy is increased to be able to overcome gravity, so that the messenger buoy 170 can rise to the surface.

The vessel 100 may use the messenger buoy 170 and the caisson pipes 114 and 115 to realize the operation of the ship and the messenger buoy with the caisson pipe as will be described in detail below with reference to FIG. 4. .

Further, the ship 100 carries and drops cargo, such as an anchor, breaks or pushes the ship, and tows the ship, as in the offshore plant anchoring method, the anchoring method of the ship, and the drift ice management method to be described in detail below. By towing, it supports offshore operations of offshore plants.

Hereinafter, the messenger buoy 170 associated with the caisson pipes 114 and 115 provided in the vessel 100 will be described in detail.

[ Caisson  Marine messenger with pipe buoy ]

3 is a perspective view of a ship messenger buoy with a caisson pipe;

As shown in FIG. 3, as described above, the messenger buoy 170 has a residence port at an upper portion of a ship supporting marine operations, and an upper deck for marine operations is provided next to the residence zone, and at least one A caisson pipe may be mounted and used on a ship having a hull provided through between the upper deck and the bottom of the ship.

The messenger buoy 170 may include a connection ring 171, a body 172, a water inlet 173, a compressed air inlet 174, and a fluid outlet 175.

The connecting ring 171 may play a role in which the messenger wire 151 of the main winch is mounted so as to be picked up by the main winch installed in the hull of the ship.

Here, the connecting ring 171 and the messenger wire 151 may be interconnected or separated, that is, mounted using the shackle 152 (shackle).

The body portion 172 is fixed to the outer surface of the connecting ring 171 body portion 172, it may be formed in a hollow so as to fill or discharge the water or compressed air.

Body portion 172 may be formed in a variety of shapes, such as spherical, ellipsoidal, round box, hollow columnar.

The body 172 may be formed to be expandable to a rubber material, a synthetic resin material, or the like.

The body portion 172 may cover the outside of the body portion 172 with a net (not shown) to protect its surface.

The water inlet 173 is an inlet through which water is injected to fill water in the body 172, and may be installed on the surface of the body 172 and piped therethrough.

The compressed air inlet 174 is an inlet through which compressed air is injected to fill the compressed air into the body 172, and is installed on the surface of the body 172 spaced apart from the water inlet 173. And may be piped through.

The fluid outlet 175 is installed on the surface of the body portion 172 on the opposite side of the compressed air inlet 174 so as to pressurize and discharge the water filled in the body portion 172 with the compressed air to the pipe through It may be.

The fluid outlet 175, the compressed air inlet 174, and the water inlet 173 may be provided with spring loaded non-return valves 176, 177, and 178, respectively.

Here, the spring-loaded non-return valves 176, 177, 178 pass the fluid in the inflow direction of each fluid (e.g., compressed air, water, sea water), as in the valves for tubes of air-filled wheels, In the direction, the valve plate may play a role of blocking the flow of the fluid by blocking the valve hole by a spring.

In this case, the spring-loaded non-return valves 177 and 178 at the water inlet 173 and the compressed air inlet 174 are directed toward the inner side of the body 172 from the outside of the body 172 of the messenger buoy 170. It may be designed to allow fluids (eg compressed air or water) to enter the system.

In addition, the spring-loaded non-return valve 176 toward the fluid outlet 175 is a fluid (for example, compressed air or water in the direction toward the outside of the body portion 172 inside the body portion 172 of the messenger buoy 170). ) Can be discharged.

In particular, the compressed air inlet 174 may be connected to the air injection coupler 184 of the compressed air hose 182 to be mounted.

That is, the air injection coupler 184 maintains the clamping force at the compressed air inlet 174 of the messenger buoy 170 under a predetermined pressure by using the friction force generated by the fitting or temporary fastening means, and then the pressure is higher than or equal to the predetermined pressure. In the reverse pressure may be separated from the compressed air inlet 174 of the messenger buoy 170.

4 is a view showing the operating state of the vessel and the messenger buoy with a caisson pipe.

As shown in Figure 4, the messenger buoy 170 is provided on the hull 110 of the vessel described above, that is, when descending through the caisson pipe 115 provided to penetrate the hull 110 in the vertical inclination direction, gravity, That is, the weight of the messenger buoy 170 is used.

That is, the worker connects the water injection gun 193 of the water supply device 190 described above to the water injection port of the messenger buoy 170, and then, the water is injected into the messenger buoy 170 by the water injection gun 193. After filling, it can be put into the upper hole of the caisson pipe 115 of the hull 110.

In this case, the main winch 150 and the sub winch 183 may release the messenger wire 151 and the compressed air hose 182 to supply.

Accordingly, the messenger buoy 170 connected to the messenger wire 151 and the compressed air hose 182 may penetrate the hull 110 through the caisson pipe 115 by its own weight and go down into the water below the bottom of the ship bottom.

Then, the hull 110 is moved to the side, it can be secured to sleep the messenger buoy 170 can rise.

Thereafter, the worker may inject the compressed air into the messenger buoy 170 through the compressed air hose 182 connected to the messenger buoy 170.

In this case, the water is discharged from the inside of the messenger buoy 170 to the outside by the spring-loaded non-return valve of the fluid outlet, and instead compressed air is filled inside the messenger buoy 170, resulting in a messenger buoy ( 170 may rise above the surface of the water.

When the messenger buoy 170 rises to the surface, it is convenient to connect with the anchor buoy 210 corresponding to another buoy of the offshore plant.

That is, without a diver or underwater operation of the ROV (Remotely Operated Vehicle), the on-line worker walks the messenger buoy 170 and the anchor buoy 210 to one place using a hook device, etc., and then connects or bundles them separately. It is possible to carry out the work of connecting to the means 101.

At this time, according to another connection method, the on-line worker pulls up the messenger buoy 170 and the anchor buoy 210 individually to the upper deck 113 of the hull 110 by using a hook device or the main crane, the upper deck 113 The connection between the buoys 170 and 210 may be performed.

Thereafter, the worker may drop the messenger buoy 170 and the anchor buoy 210 interconnected on the surface of the upper deck 113 using the main crane.

Thereafter, the main winch 150 and the sub winch 183 may wind up and recover the messenger wire 151 and the compressed air hose 182.

In this case, the lead line 211, the chaser 212, and the part of the anchor chain 213 of the anchor buoy 210 along the interconnected buoys 170 and 210 are connected to the hull 110 through the caisson pipe 115. It can be raised toward the upper deck 113.

Here, one end of the anchor chain 213 above the water surface may be connected to the offshore plant 200, the other end of the anchor chain 213 below the water surface is connected to the plant anchor 220 fixed to the seabed There may be.

In addition, the chaser 212 is integrated with the chaser body to connect the lead-shaped chaser body and the lead line 211 or pennant string which are inserted at a position between one end and the other end of the anchor chain 213. It may be provided with an eyepiece formed.

Here, the chaser 212 is a kind of recovery device, and is disclosed in US Patent No. 4,098,216, or Korean Patent Publication No. 10-1995-0012272, and thus may be omitted in this embodiment.

After the shipboard operator separates the lead line 211 and the chaser 212, the chaser 212 is connected to the main winch 150, and the anchor chain 213 is connected to the main winch 150 through the chaser 212. It can be wound up by.

In this case, the hull 110 is anchored to be supported by the chaser 212, the anchor chain 213 and the plant anchor 220, not only stably mooring or anchoring, but also the offshore plant 200 It is possible to efficiently carry out ice handling or management such as blocking, breaking, or pushing down the ice floes, which are relatively larger than the size of the hull 110, without the ship's power or with minimal power.

Hereinafter, the marine plant anchoring method, the anchoring method of the ship, and the drift ice management method will be described in detail with respect to the ship and the messenger buoy 170 having the caisson pipe 115 described above.

[ Caisson  Offshore plant using ship with pipe Anchoring  Way]

Figure 5 is a flow chart of the offshore plant anchoring method using a vessel having a caisson pipe.

As shown in Figure 5, the offshore plant anchoring method using a vessel having a caisson pipe is provided with a residence port in the upper portion of the vessel supporting the marine work, the upper deck for marine work is provided next to the residence, At least one caisson pipe may be a method of applying a ship having a hull provided between the upper deck and the bottom surface to the offshore plant anchoring.

An offshore plant anchoring method using a vessel equipped with a caisson pipe includes mounting an end of a plant anchor and an anchor chain lowered from an offshore plant that is a marine work support target of a vessel on an upper deck of a vessel (S110), and the plant anchor on the anchor chain. Separating from the end of the step (S120), and the messenger buoy provided in the ship through the caisson pipe to the bottom of the ship may include a step (S130) to float on the water surface.

The offshore plant anchoring method using a vessel provided with a caisson pipe includes connecting the end of the anchor chain and the messenger buoy (S140), and the end of the anchor chain and the messenger buoy connected to each other through the caisson pipe. Lifting up the upper deck of the vessel (S150), and the step of carrying the plant anchor and the anchor chain to the anchoring point by the vessel (S160).

The offshore plant anchoring method using a vessel having a caisson pipe sends the anchor chain and the messenger buoy to the ship bottom through the caisson pipe and then floats the messenger buoy onto the water surface (S170) and the anchor using the messenger buoy. It may include the step of connecting the end of the chain on the upper deck of the vessel and the plant anchor (S180), and dropping the plant anchor to the anchoring point (S190).

Hereinafter, a method of anchoring an offshore plant using a vessel having a caisson pipe may be described with reference to FIGS. 6 to 14 shown for each of the above-mentioned steps S110 to S190.

6 to 14 are schematic views showing the offshore plant anchoring method shown in FIG.

Referring to FIG. 6, the step S110 of FIG. 5, wherein the offshore plant 200 that is a marine work support target of the ship 100 includes an anchor chain 213, an anchor chain winch 214, and a plant anchor 220. Each can be provided in plurality or one or more.

Vessel 100 may be approached and positioned below the plant anchor 220 of the offshore plant 200 to carry and lift the plant anchor 220.

The offshore plant 200 may control the operation of the anchor chain winch 214 winding or unwinding the anchor chain 213 to lower the anchor chain 213 and the plant anchor 220.

Accordingly, the end of the plant anchor 220 and the anchor chain 213 lowered may be mounted on the upper deck 113 of the vessel 100.

Referring to FIG. 7, as it relates to step S120 of FIG. 5, the operator of the ship 100 separates the plant anchor 220 from the end of the anchor chain 213.

Thereafter, the position of the vessel 100 may be properly adjusted in consideration of the support position of the messenger buoy 170 before and after use of the messenger buoy 170.

In addition, the operator of the vessel 100 fills the water inside the messenger buoy 170 as described above using the water supply device 190.

Referring to FIG. 8, which relates to step S130 of FIG. 5, the operator inserts the messenger buoy 170 provided in the vessel 100 into the upper hole of the caisson pipe 114, and operates the main winch and the sub winch. The messenger wire 151 (see FIG. 9) and the compressed air hose 182 (see FIG. 9) can be supplied and supplied.

Accordingly, the messenger buoy 170 connected to the messenger wire 151 and the compressed air hose 182 penetrates the hull 110 through the caisson pipe 114 by its own weight and passes through the lower hole of the caisson pipe 114. Through the bottom of the bottom can be underwater.

Then, the ship 100 is moved to the side, it can be secured to sleep the messenger buoy 170 can rise.

Thereafter, the worker may inject the compressed air into the messenger buoy 170 through the compressed air hose 182 connected to the messenger buoy 170 using the compressed air supply device 180.

In this case, the water is discharged from the inside of the messenger buoy 170 to the outside, and instead compressed air is filled in the inside of the messenger buoy 170, as a result the messenger buoy 170 may rise above the water surface. Since the moving and injuring principles by the weight of the messenger buoy 170 are as described above, detailed descriptions of the moving and injuring principles may be omitted in order to avoid redundant description.

Referring to FIG. 9, the step S140 of FIG. 5 relates to a collaboration between a plant operator controlling the anchor chain winch 214 of the offshore plant 200 and a worker controlling the main winch and sub winch of the vessel 100. Through this, the end of the anchor chain 213 can be as close as possible to the messenger buoy 170.

In the present embodiment, the collaboration means communication between the worker of the ship 100 and the plant worker of the offshore plant 200 through a communication device, so that the anchor chain winch 214, the main winch and the sub winch of the ship 100 are communicated. The operation (winding or unwinding operation) may be controlled by winding according to the work demand situation.

Thereafter, the worker of the vessel 100 may interconnect the end of the anchor chain 213 and the messenger buoy 170 using a hook device, a binding means, a main crane, or the like.

Referring to FIG. 10, the step S150 of FIG. 5 relates to a collaboration between a plant operator controlling an anchor chain winch 214 of an offshore plant 200 and a worker controlling a main winch and a sub winch of a vessel 100. Through this, the anchor chain 213 can be released and supplied, and the messenger wire 151 and the compressed air hose 182 can be wound and recovered.

In this case, the end of the interconnected anchor chain 213 and the messenger buoy 170 are moved to the bottom of the vessel 100 and then pulled up on the upper deck 113 of the vessel 100 through the caisson pipe 114. Can be.

In addition, the operator of the ship 100 may separate the end of the anchor chain 213 from the messenger buoy 170, and then connect the end of the anchor chain 213 to the main winch 150 of the ship 100.

Referring to FIG. 11, which relates to step S160 of FIG. 5, when the winch 214, which is an anchor chain of the offshore plant 200, releases and supplies the anchor chain 213, the vessel 100 is plant anchor 220. And to carry the anchor chain 213 to the anchoring point.

At this time, as the anchor chain 213 is connected via the bottom of the vessel 100 and the inclined caisson pipe 114, it is possible to avoid drift ice near the water surface, and the anchor chain 213 is the upper deck on which the worker stands. Since it is not close to 113, the worker's safety accident can be prevented in advance.

Referring to FIG. 12, which relates to step S170 of FIG. 5, the operator of the ship 100 may disconnect the end of the anchor chain 213 from the main winch and then connect the messenger buoy 170 again.

Thereafter, similarly as described with reference to FIG. 8, after sending the anchor chain 213 and the messenger buoy 170 to the ship bottom through the caisson pipe 114, the messenger buoy 170 may be floated on the water surface.

Referring to FIG. 13, which relates to step S180 of FIG. 5, a worker uses a hook device or a main crane, but uses an outer space of the vessel 100 instead of the caisson pipe 114 to determine the anchor chain 213. The end portion and the messenger buoy 170 may be lifted above the upper deck 113 of the vessel 100.

Thereafter, the worker may separate the ends of the messenger buoy 170 and the anchor chain 213 and then connect the end of the separated anchor chain 213 with the plant anchor 220.

Referring to FIG. 14, which relates to step S190 of FIG. 5, the plant operator may loosely or tautly adjust the anchor chain 213 by controlling the winch 214, which is an anchor chain of the offshore plant 200.

The worker of the ship 100 in cooperation with such a plant worker can drop the plant anchor 220 interconnected with the anchor chain 213 to the anchoring point by using the main crane provided in the ship 100.

This operation is repeatedly performed corresponding to the number of plant anchors 220, as a result, the anchoring of the offshore plant 200 can be completed.

[ Caisson  Of ships with pipes Anchoring  Way]

15 is a flow chart of a method of anchoring a ship with caisson pipes.

As shown in Figure 15, the anchoring method of a ship having a caisson pipe is provided with a residence port in the upper portion of the vessel supporting the marine work, the upper deck for marine work is provided next to the residence, one or more caisson A method of anchoring a ship having a hull provided through a pipe between the upper deck and the bottom surface can be disclosed.

The anchoring method of the ship having a caisson pipe is a step of the ship approaching the anchor anchor buoy for the plant anchor disposed on the sea floor for mooring the offshore plant that is the marine work support target of the ship (S210) and the messenger buoy provided on the vessel It may include a step (S220) to descend to the bottom of the vessel through the caisson pipe and float on the water surface.

In addition, the anchoring method of the ship having a caisson pipe connecting the messenger buoy and the anchor buoy (S230), the messenger buoy and the anchor buoy connected to the upper deck of the ship through the caisson pipe It may include the step of lifting (S240).

In addition, the anchoring method of the ship provided with a caisson pipe is connected to the chaser of the anchor chain raised along the anchor buoy to the winch of the ship (S250), the anchor chain connected to the chaser and the state supported by the plant anchor An anchoring of the vessel at may include a (S260).

Hereinafter, a method of anchoring a ship having a caisson pipe may be described with reference to FIG. 16 regarding the above-mentioned steps S210 to S260.

FIG. 16 is a schematic view illustrating an anchoring method of a ship having a caisson pipe shown in FIG. 15.

As shown in FIG. 16, the operator of the ship 100 having the caisson pipes 114 and 115 fills the messenger buoy 170 with water using the water supply device 190 provided in the ship 100.

Thereafter, the operator inserts the messenger buoy 170 filled with water into the upper hole of the caisson pipe 115 of any one of the caisson pipes 114 and 115, and operates the main winch and the sub winch to operate the messenger wire ( 151 and the compressed air hose 182 can be released and supplied.

Accordingly, the messenger buoy 170 connected to the messenger wire 151 and the compressed air hose 182 penetrates the hull 110 through the caisson pipe 115 by its own weight, and passes through the lower hole of the caisson pipe 115. Through the bottom of the bottom can be underwater.

Then, the ship 100 is moved to the side, it can be secured to sleep the messenger buoy 170 can rise.

Thereafter, the worker may inject the compressed air into the messenger buoy 170 through the compressed air hose 182 connected to the messenger buoy 170 using the compressed air supply device 180.

In this case, the water is discharged from the inside of the messenger buoy 170 to the outside, and instead compressed air is filled in the inside of the messenger buoy 170, as a result the messenger buoy 170 may rise above the water surface.

On the other hand, the offshore plant 200 may be moored or anchored using the anchor chain 213 between the offshore plant 200 and the plant anchor 220 of the seabed.

At this time, the anchor chain 213 may be kept taut or loosely maintained under the control of the winch 214 which is the anchor chain of the offshore plant 200.

In addition, the chaser 212 may be connected to the anchor chain 213.

In addition, the chaser 212 may be connected to the lead line 211 and extend toward the water surface.

An anchor buoy 210 floating on the surface of the lead line 211 may be connected.

The operator of the vessel 100 allows the messenger buoy 170 and the anchor buoy 210 to be as close as possible using a hook device or the like.

Thereafter, the worker may connect the messenger buoy 170 and the anchor buoy 210 by using the bundle means 101.

Further, according to another connection method, the operator pulls up the messenger buoy 170 and the anchor buoy 210 individually to the upper deck 113 of the hull 110 using a hook device or a main crane, and then the upper deck 113. The connection between the buoys 170 and 210 may be performed.

Thereafter, the worker may drop the messenger buoy 170 and the anchor buoy 210 interconnected on the surface of the upper deck 113 using the main crane.

Subsequently, the main winch 150 and the sub winch 183 are wound around the messenger wire 151 and the compressed air hose 182 to recover the messenger buoy 170 and the anchor buoy 210. .

A portion of the lead line 211, the chaser 212, and the anchor chain 213 of the anchor buoy 210 along the messenger buoy 170 and the anchor buoy 210 are pulled out of the caisson pipe 115. Through the upper deck 113 can be raised.

Thereafter, the worker may connect the chaser 212 of the anchor chain 213 raised along the anchor buoy 210 to the main winch 150 of the vessel 100.

As a result, the ship 100 can be anchored in the state supported by the anchor chain 213 and the plant anchor 220 connected to the chaser 212.

Such a vessel 100 can be relatively stable mooring than when using a vessel anchor (not shown) provided in the vessel 100 itself, and can also handle drift ice that is relatively much larger than the size of the hull 110. The anchoring state can be maintained to such an extent.

[ Caisson  Drift Ice Management Method Using Vessel with Pipe]

17 is a flowchart of a method of managing drift ice using a vessel provided with a caisson pipe.

As shown in Figure 17, the drift ice management method using a vessel having a caisson pipe is provided with a residence port in the upper portion of the vessel for supporting the marine work, the upper deck for marine work next to the residence is provided, one Said caisson pipe may be a method of applying a vessel having a hull provided through the upper deck and the bottom surface to the management of drift ice or ice floe around the offshore plant.

The drift ice management method using a vessel equipped with a caisson pipe has a first step (S310) in which the vessel approaches an anchor buoy for a plant anchor disposed on the sea floor for mooring an offshore plant that is a marine operation support target of the vessel, and the vessel And a second step (S320) of lowering the prepared messenger buoy to the bottom of the ship through the caisson pipe and floating on the water surface, and a third step (S330) of connecting the messenger buoy and the anchor buoy.

In addition, the drift ice management method using a vessel equipped with a caisson pipe is a fourth step (S340) to lift the messenger buoys and the anchor buoys connected to the upper deck of the vessel through the caisson pipe and the anchor buoys A fifth step of connecting the chaser of the anchor chain along the main winch of the ship (S350), and the sixth step (S360) of anchoring the ship in the state supported by the anchor chain and the plant anchor connected to the chaser It may include.

The first step S310 to the sixth step S360 may be the same methods as those described with reference to FIG. 15 or 16.

In addition, the drift ice management method using a vessel provided with a caisson pipe may include a seventh step of anchoring the vessel to the plant anchor or another plant anchor corresponding to or similar to or similar to the first to sixth steps S310 to S360. S370) and an eighth step S380 of moving or crushing the drift ice based on the plant anchor or the other plant anchor as a support base.

Hereinafter, a method of anchoring a ship having a caisson pipe may be described with reference to FIG. 18 for the above-mentioned steps S310 to S380.

FIG. 18 is a schematic diagram illustrating a method of managing drift ice using a ship having a caisson pipe shown in FIG. 17.

As shown in FIG. 18, the one side vessel 100a having the same configuration as the other side vessel 100 and corresponding to the other vessel is the above-described 'anchoring method for a vessel having a caisson pipe' or the first step of FIG. 17. By performing the respective steps (S310) to sixth (S360), it may be anchored to the plant anchors 220 and 220a of the offshore plant 200, respectively.

Accordingly, when moving or crushing the drift ice floating around the offshore plant 200 or the drift ice 300 around the offshore plant 200, the plant anchors 220, 220a are supported on the basis of no ship power, ie, ship power. It is possible to handle or manage the drift ice, such as to block, break, or push the drift ice 300 without using or using the minimum power.

For example, even if the drift ice 300 floats toward one side vessel 100a supported by one side plant anchor 220a, one side vessel 100a is supported by one side plant anchor 220a and its anchor chain 213a without power for the vessel. Or may be anchored to block the drift ice (300).

Thereafter, the other vessel 100 supported by the other plant anchor 220 may rush toward the drift ice 300 to break the drift ice 300.

That is, since one side of the drift ice 300 may be in a state that is not pushed by the one side of the vessel 100a without being different from the fixed state, the rushing force of the other side vessel 100 is transmitted to the drift ice 300 as it is, and very efficiently The drift ice 300 may be broken.

In addition, since the other vessel 100 is also supported or anchored to the other plant anchor 220 and its anchor chain 213, even if the drift ice 300 moves toward the other vessel 100, the drift ice 300 with the minimum power. You can stop it.

In addition, the other side and one side of the vessel (100, 100a) may be in cooperation with the plant winch of the offshore plant 200 when controlling the operation of the main winch is mounted.

In addition, the other vessel 100 may also be used for the purpose of breaking or pushing the drift ice 300 of the lifting force of the main winch of the other vessel (100).

The other side and one side of the vessel (100, 100a) can adjust the tension of the anchor chain (213, 213a) by extending or contracting the length of the anchor chain (213, 213a), it is possible to move according to the floating ice 300 situation It may be supported to easily process the drift ice 300.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element according to the application field, or can combine or substitute the embodiments in a form not explicitly disclosed in the embodiment of the present invention, It is to be understood that the invention is not limited to the disclosed embodiments. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

100, 100a: ship 110: hull
114, 115: caisson pipe 120: side thruster
130: underwater pod 140: main crane
150: main winch 160: equipment room
170: messenger buoy 180: compressed air supply device
190: water supply device 200: offshore plant
210: anchor buoy 220, 220a: plant anchor

Claims (10)

In the drift ice management method using a ship having a hull provided with an upper deck is provided on the upper portion of the vessel for supporting marine operations, the one or more caisson pipe is provided between the upper deck and the bottom surface,
A first step of anchoring the first vessel to a first plant anchor disposed on the seabed for mooring of an offshore plant subject to offshore operations;
Anchoring the second vessel to the first plant anchor or to the second plant anchor in the same manner as anchoring the first vessel;
A third step of moving or crushing drift ice at least one of the first vessel and the second vessel, based on the first plant anchor or the second plant anchor,
In the first step,
Steps 1-1 of the first ship approaching anchor buoys for plant anchors arranged on the ocean floor for mooring offshore plants supported for offshore operations;
A first and second steps of lowering the messenger buoy provided in the first vessel to the bottom of the first vessel through the caisson pipe and floating on the water surface;
A first to third step of connecting the messenger buoy and the anchor buoy;
A first to fourth step of lifting the interconnected messenger buoy and the anchor buoy over the upper deck of the first vessel through the caisson pipe;
Steps 1-5 of connecting the chaser of the anchor chain connected to the anchor buoy raised along the anchor buoy to the main winch of the first vessel;
And a first step of anchoring the first vessel in a state supported by the anchor chain and the plant anchor connected to the chaser.
Drift ice management method using ship with caisson pipe.
delete The method of claim 1,
In the above 1-2 steps,
Filling water into the messenger buoy through the water inlet of the messenger buoy from the water supply device provided in the first vessel;
By the weight of the messenger buoy filled with the water, the messenger buoy is moved through the caisson pipe to reach the water below the bottom of the first ship
Drift ice management method using ship with caisson pipe.
The method of claim 3, wherein
When the messenger buoy moves through the caisson pipe, the main winch or sub winch installed in the first vessel releases and supplies any one or more of a messenger wire and a compressed air hose connected to the messenger buoy.
Drift ice management method using ship with caisson pipe.
The method of claim 3, wherein
The messenger buoy that has reached the bottom of the bottom of the first ship,
Instead of discharging the water in the inside of the messenger buoy by receiving compressed air from the compressed air supply device provided in the first vessel, the compressed air is filled in the messenger buoy to rise to the surface. Characterized
Drift ice management method using ship with caisson pipe.
The method of claim 1,
In the first step 1-3,
After hooking the messenger buoy and the anchor buoy with a hook device and gathering them in one place, a process of connecting the messenger buoy and the anchor buoy by a binding means is performed.
Drift ice management method using ship with caisson pipe.
The method of claim 1,
In the first step 1-3,
Using the hook device or the main crane provided in the first vessel to individually pull up the messenger buoy and the anchor buoy to the upper deck, and then perform a buoy connection operation on the upper deck;
Using the main crane to drop the messenger buoy and the anchor buoy interconnected on the surface of the upper deck;
Drift ice management method using ship with caisson pipe.
The method of claim 1,
In step 1-4,
Pulling the interconnected messenger buoy and the anchor buoy as the main winch and the sub winch installed on the first vessel wind and recover the messenger wire and the compressed air hose connected to the messenger buoy;
Leading, chaser, a part of the anchor chain connected to the anchor buoy with the anchor buoy to be pulled up to the upper deck through the caisson pipe is included.
Drift ice management method using ship with caisson pipe.
The method of claim 1,
In the third step,
At least one of the first vessel and the second vessel prevents, breaks, or pushes the drift ice based on the first plant anchor or the second plant anchor.
Drift ice management method using ship with caisson pipe.
10. The method of claim 1 or 9,
In the third step,
Blocking the drift ice by the first vessel supported or anchored by the first plant anchor,
And the second vessel supported or anchored by the first plant anchor or the second plant anchor approaching the drift ice to break the drift ice.
Drift ice management method using ship with caisson pipe.

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