KR20180046325A - Replacement apparatus of flare tip for marine construction and replacement method using the same - Google Patents

Abstract

The present invention provides an apparatus to replace a flare tip of an offshore structure and a replacement method using the same. According to the present invention, the apparatus comprises: an extended platform extended from one side of a tip platform and installed to be able to rotate; a tip flange connected to a lower part of the flare tip; at least one transfer rail installed on a floor of the tip and extended platforms; a moving member to be straightly reciprocated along the transfer rail; a lifting member connected between the moving member and the tip flange to upwardly lift the flare tip; a horizontal pulling member to move the flare tip connected to the transfer member between the tip and extended platforms; and a winch disposed in a fixed platform of an offshore structure disposed in a lower part of the tip platform, and capable of winding or unwinding a wire whose one end is connected to the flare tip. As such configuration, a replacement method comprises: a step of using the lifting member to lift the flare tip to be replaced or repaired to a predetermined position from the tip platform; a step of pulling the flare tip with the horizontal pulling member to transfer the flare tip to the extended platform through the moving member and the transfer rail; a step of rotating the extended platform and performing unloading work with the winch; and a step of mounting a new tip on the tip platform in reverse order of the unloading work.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a flare tip replacement apparatus for a marine structure,

The present invention relates to an apparatus for replacing a flare tip of an offshore structure and a method for replacing the same.

The use of various resources is rapidly increasing in accordance with industrialization, and development of resources such as crude oil and natural gas is becoming a very important issue.

Recently, special vessels equipped with various exploration and drilling equipments, such as drilling ships, semi-submersible drilling rigs and marine working vessels such as floating production storage and offloading unit (FPSO) Has been developed and is engaged in exploration and mining operations for the production of various resources from the deep sea.

In addition to the FPSO mentioned above, there are also FPSO for liquefied natural gas and various other offshore plants.

These vessels and offshore structures are equipped with flare towers that burn crude oil drilled in the sea bed or waste gas remaining after refining natural gas.

The flare tower is a safety facility that incineration of surplus gas during refining and incineration and discharge of gas in case of sudden overspray.

The reason for burning the waste gas is that the waste gas generated in the production process of petroleum or natural gas contains hydrocarbon substances of various chemical species and may cause air pollution if it is discharged to the atmosphere as it is. Therefore, a method of burning and discharging waste gas is usually processed.

At the end of the flare tower is a flared flare tip. Such a flare tip will not function normally due to aging after a certain period of time. In this case, the replacement procedure is required.

Conventionally, a helicopter was used to replace the flare tip, or additional structures were installed on the tip platform with the flare tip.

When using a helicopter, there is a risk of accompanying safety hazards.

If separate structures are installed, materials, manpower and time are required. When replacing the flare tip with a separate structure, workers must transfer the material directly from the deck to the tip platform of the offshore structure. Since the structure is installed in a limited space, it takes a long time to construct the structure for replacement .

Korean Patent Publication No. 10-2014-0086254 Korean Patent Publication No. 10-2015-0010277

It is an object of the present invention to provide a flare tip replacement apparatus for an offshore structure which is safe and advantageous in terms of time, space and production cost, and a replacement method using the flare tip replacement apparatus.

According to an aspect of the present invention, there is provided an elongated platform comprising: an elongated platform extending from one side of a tip platform on which a flare tip is installed and waiting the flare tip at a predetermined position when the flare tip is replaced; A tip flange connected to a lower portion of the flare tip; At least one feed rail provided at the bottom of the tip platform and the extension platform; A moving member that linearly reciprocates along the feed rail; A lifting member connected between the moving member and the tip flange to lift the flare tip upward; A horizontal pulling member for moving the flare tip connected to the moving member between the tip platform and the extension platform; And a winch disposed in a fixed platform of an offshore structure disposed at a lower portion of the tip platform, the winch having one end connected to the flare tip and being capable of being wound or unwound.

  The tip flange having a ring-shaped body coupled to a lower portion of the flared tip; And a flange portion projecting radially from the body, wherein the flange portion can be connected to the lifting member.

The lifting member may include a hydraulic jack, and the ram portion of the hydraulic jack may be releasably connected to a flange portion of the tip flange.

A coupling nut is formed in the ram portion of the hydraulic jack and a coupling hole is formed in the flange portion of the tip flange so that the coupling bolt is inserted into the coupling nut portion of the ram portion of the hydraulic jack have.

The extension platform comprising: a lower bottom plate rotatably connected in a downward direction through a hinge unit; And a side plate disposed on one side of the bottom plate.

The horizontal pulling member may comprise a chain block in which one hook is connected to the flared tip and another hook is connected to the extension platform.

The flared tip may have a wire wound to connect the one hook of the chain block and a lug connected to another hook of the chain block may be formed on the extended platform.

A safety door may be provided at a portion of the tip platform where the extension platform is connected.

And a connecting bar connecting the moving member.

The tip platform may be provided with a storage box for storing the moving member, the horizontal pulling member, and the connecting bar.

The storage box may be formed of a heat resistant material.

The extension platform may be provided with a pulley for rotatably supporting the wire drawn out from the winch.

The transferring rail may be provided in a buried shape so as not to protrude from the bottom of the tip platform and the extending platform.

According to another aspect of the present invention, there is provided a method comprising: connecting a lifting member to a flare tip, lifting it to a predetermined position on a tip platform, and then transferring the lifting member from one side of the tip platform to an extended platform; Connecting a wire drawn from a winch on a fixed platform disposed under the tip platform to the flared tip through a pulley provided on the extension platform; Separating the lifting member from the flared tip; And lowering the flared tip from the elongate platform.

 Wherein the step of transferring the flare tip to the elongated platform comprises: connecting a movable member on a transfer rail formed on the tip platform and the elongated platform; Connecting a lifting member between the moving member and a tip flange provided on the flared tip; Driving the lifting member to lift the flared tip to a predetermined position; And transferring the flared tip lifted to the predetermined position through the horizontal pulling member and to the center of the extending platform through the transferring rail and the moving member.

Between the step of lifting the flare tip and the step of transferring the flare tip to the center of the extension platform, a hook portion of the horizontal pulling member is connected to the flare tip and another hook portion of the horizontal pulling member is connected to the extension platform And a horizontal pulling member connecting step of connecting the horizontal pulling member.

 Wherein the lowering of the flared tip comprises rotating the lower floor plate of the extension platform downwardly through the hinge unit; And lowering the flared tip through the secured space of the extension platform.

The connecting bolt is inserted through the fastening hole formed in the flange portion of the tip flange and the fastening nut portion formed in the upper portion of the lifting portion of the lifting member in the step of connecting the lifting member between the moving member and the tip flange provided on the flared tip, So that the lifting member can be fixedly connected without shaking from the tip flange portion.

Separating the wire of the winch from the flared tip lowered to the fixed platform of the offshore structure, connecting the wire of the winch to a new flare tip, and reversing the descending order of the flare tip, And lifting and mounting to the tip platform.

According to the present invention there is provided a method of making a flare tip comprising a rotatable extension platform on one side of the tip platform and having a tip flange connectable to a lifting member for lifting the flare tip underneath the flare tip, It is possible to replace the flare tip in a short time and at a low cost while securing it with a horizontally transportable transport structure.

1 is a perspective view showing a configuration of a replacement device for a flared tip of the present invention.
2 is a partially separated perspective view showing the configuration of a tip flange and a lifting member of a flare tip of the present invention.
3 is a partial perspective view showing a state in which the flare tip of the present invention is transferred from the tip platform to the extending platform;
Fig. 4 is a partial perspective view showing a state in which the lower deck of the extending platform of Fig. 3 is rotated downward.
5 is a flowchart showing a replacement method of the flare tip of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know.

1 is a perspective view showing a configuration of a replacement device for a flared tip of the present invention.

Referring to Figure 1, a flare tip (3) is installed in the tip platform (10). The tip platform 10 includes a handrail 12 provided along the edge of the bottom plate 11 of the bottom plate 11 on which the flare tip 3 is installed and a safety door 13 provided on one side of the handrail 12 ).

According to the present invention, an additional working space is provided on one side of the tip platform 10 for replacement of the flare tip 3, and after the flare tip 3 is transferred from the tip platform 10, A flare tip replacement device 100 configured to perform a flare tip replacement device 100 is provided.

The flare tip replacing apparatus 100 of the present invention is useful for a task of lowering the flare tip 3 from the tip platform 10 and then replacing the flare tip 3 with a new flare tip and mounting it on the tip platform 10, The tip may include a maintenance flare tip that has been repaired with the aged flare tip 3, including the aging flare tip 3 mounted on the tip platform 10.

The flare tip replacement apparatus 100 includes an elongated platform 110, a tip flange 130, a transfer rail 140, a shifting member 150, a lifting member 160, a horizontal pulling member 170, a winch 180, A connection bar 190, and a storage box 120.

The extension platform 110 is provided on one side of the tip platform 10 and is substantially upright from a lower deck 111 connected to the bottom plate 11 of the tip platform 10 and a horizontal lower deck 111 And a side plate 113 disposed thereon.

The lower deck 111 is composed of two lower decks 111a and 111b rotatable in a downward direction, for example, through a hinge unit 114 so as to secure a space in which the flare tip 3 can descend do.

 The extensible platform 110 may be made of an alloy of materials that can withstand high temperatures and corrosion, such as nickel, chromium, and iron. The extension platform 110 may be made of, for example, Inconel (trade name) material.

The tip flange 130 is connected to the lower portion of the flare tip 3. The tip flange 130 may be integrally joined or detachably coupled to the flare tip 3. That is, the tip flange 130 may be provided beforehand to the flare tip 3 before the flare tip 3 is installed on the tip platform 10, or may be detachably configured on the flare tip 3 to replace the flare tip 3 Can be configured to be coupled to the outside of the lower portion of the time flared tip (3).

The transfer rail 140 is installed on the bottom plate 11 of the tip platform 10 and the bottom plate 111 of the extension platform 110. The transfer rail 140 is disposed in a substantially straight line from the bottom plate 11 of the tip platform 10 to the bottom plate 111 of the extending platform 110. In the drawing, two conveying rails 140 are arranged side by side at regular intervals. The transfer rail 140 is embedded in the bottom plate 11 of the tip platform 10 and the bottom plate 111 of the extension platform 110 so as not to interfere with the operator or tool. The feed rail 140 is configured to be cut, for example, at a boundary between the bottom plate 11 of the tip platform 10 and the bottom plate 111 of the extension platform 110, .

The shifting member 150 can be variously shaped such as a roller member that is linearly reciprocable along the feed rail 140, a roller member that can roll, or a slidable member that is fitted on the feed rail 140.

The lifting member 160 is configured to be connected to the moving member 150 and the tip flange 130 so that the flare tip 3 can be lifted at a constant height above the tip platform 10. [ The lifting member 160 may include, for example, a hydraulic jack (hereinafter referred to as "hydraulic jack 160"). In another embodiment, lifting member 150 may include a variety of lifting and lowering structures such as a structure including a linear motion structure including a rack-pinion gear structure, a motor, a conveying nut and a conveying screw, a guide rail, and the like.

The horizontal pulling member 170 provides a pulling force on the flare tip 3 to allow the flare tip 3 to move horizontally through the feed rail 140 and the shifting member 150. The horizontal pulling member 170 includes a hook 171 connected to the flared tip 3 and a hook 173 connected to the extension platform 110 Two hooks 173 ") and a connecting chain 174. The connecting chain 174 may comprise a chain block. Hereinafter, the horizontal pulling member 170 is referred to as a "chain block 170 ".

A chain block wire 175 is wound around the flared tip 3 to connect the first hook 171 of the chain block 170. [ The extension platform 110, for example the side plate 113, is provided with a lug 115 to which the second hook 173 of the chain block 170 is connected.

A connecting bar 190 is connected between the moving members 150 so that the feeding operation of the flare tip 3 can be performed safely and firmly.

One side of the bottom plate 11 of the tip platform 10 is provided with a storage box 120 capable of storing various components used in replacement of the flared tip 3, such as a hydraulic jack 160, a moving member 150, . The storage box 120 is formed of a material having excellent heat resistance and can withstand a high-temperature incineration atmosphere to safely store the durable composition.

The winch 180 is employed for the up and down movement of the flare tip 3. The winch 180 is disposed on a fixed platform 5, such as a deck of an offshore structure, disposed below the tip platform 10. The winch 180 includes a cylindrical drum 181 and a wire 183 wound and unwound on the drum 181. A pulley 185 is disposed on the extension platform 110, such as the side plate 113, to carry the wire 183 in a transportable manner.

The wire 183 is not substantially connected to the flare tip 3 when the flare tip 3 is installed on the tip platform 10. [

2 is a partially separated perspective view showing the configuration of a tip flange and a lifting member of a flare tip of the present invention.

Referring to FIG. 2, a tip flange 130 is provided at the lower portion of the flare tip 3. The tip flange 130 includes a body portion 131 having a substantially ring shape to be fitted to the lower portion of the flare tip 3 and a plurality of flange portions 133 projecting radially from the body portion 131.

The flange portion 133 is formed with a fastening hole 133a. The hydraulic jack 160 includes a ram portion 163 provided inside the cylinder 161 so as to be movable up and down. A locking nut portion 163a is formed at an upper end of the ram portion 163. [ With this configuration, the flared tip 3 and the hydraulic jack 160 can be firmly coupled without detaching by using the fastening bolt 135. That is, as the fastening bolt 135 is fastened through the fastening hole 133a formed in the flange portion 133 of the tip flange 130 and the fastening nut portion 163a of the ram portion 163, It is possible to securely move from the flange 130 and perform a smooth lifting operation. The coupling nut portion 163a formed in the ram portion 163 has a structure in which the fluid in the cylinder 161 of the hydraulic jack 160 does not affect the leakage. The fixing structure of the flange portion 133 and the hydraulic jack 160 is not limited thereto and can be modified into various coupling structures.

3 is a partial perspective view showing a state in which the flare tip of the present invention is transferred from the tip platform to the extending platform;

3, the flared tip 3 is transferred to the center of the elongated platform 110 through the transfer rail 140 and the movable member 150 with a horizontal movement force using the chain block 170. The flared tip 3 transferred to the center of the extension platform 110 is connected to the wire 183 drawn from the drum 181 of the winch 180 for descent. The wire 183 is connected to the flare tip pad eye 3a provided on the flare tip 3. [

Fig. 4 is a partial perspective view showing a state in which the lower deck of the extending platform of Fig. 3 is rotated downward.

4, the lower decks 111a and 111b of the extension platform 110 rotate downward through the hinge unit 114 in order to secure a space for the lowering operation of the flare tip 3. As shown in FIG. Thus, the flare tip 3 can smoothly descend through the space secured by the rotation of the lower bottom plates 111a and 111b.

The following describes how to replace the flare tip using the replacement system 110 configured as described above.

5 is a flowchart showing a method of replacing the flared tip of the present invention.

Referring to FIG. 5, a method of replacing a flare tip includes steps of connecting a lifting member to a flare tip, lifting the lifting member to a predetermined position on a tip platform, and transferring the lifting member to an extended platform extending from one side of the tip platform, 10) connecting a wire drawn from a winch on a fixed platform to a flare tip through a pulley provided on the extension platform, separating the lifting member from the flare tip S30, And lowering the flared tip from the extension platform (S40).

Each step will be described in more detail below.

1 to 3 and 5, the flared tip 3 transfer step S10 includes connecting the moving member 150 on the transfer rail 140, moving the movable member 150 and the flare A step S12 of lifting the flared tip 3 by driving the hydraulic jack 160, a step of connecting the chain block 170 as a horizontal pulling member, a step of connecting the hydraulic jack 160 as a lifting member, (S15) connecting the flare tip (3) to the flare tip (3) and the extension platform (110), and opening the safety door (13) of the tip platform 110). ≪ / RTI >

The connecting bar 190 is connected to connect the two moving members 150 in a direction perpendicular to the moving direction of the feeding rail 140 in the step S11 of connecting the moving member 150 on the feeding rail 140 Connect. With this configuration, when the flare tip 3 is pulled through the chain block 170, the flare tip 3 can be stably conveyed through the moving member 150 and the conveying rail 140.

The hydraulic jack 160 is connected to the flare tip 3 through the tip flange 130 in step S11 of connecting the hydraulic jack 160 between the shifting member 150 and the flare tip 3.

2, the fastening bolt 15 passes through the fastening hole 133a of the flange portion 133 of the tip flange 130 connected to the lower portion of the flare tip 3 and then passes through the fastening hole 133a of the flange portion 133 of the ram portion 163 And is fastened to the fastening nut portion 163a. Therefore, the hydraulic jack 160 is connected to the flare tip 3 without shaking. Here, the tip flange 130 may be in a state preliminarily provided in the flare tip 3 before the flare tip 3 is installed on the tip platform 10. In another embodiment, the tip flange 130 is releasably configured on the flare tip 3 and can engage outside the lower portion of the flare tip 3 when the flare tip 3 is replaced.

When the fluid is supplied into the cylinder 161 of the hydraulic jack 160 in the step S13 of raising the flare tip 3 by driving the hydraulic jack 160, the ram portion 163 rises and the flared tip 3 ) Rises to a certain height. At this time, as the ram portion 163 and the tip flange 130 of the flare tip 3 are fixed through the fastening bolts 135, the ram portion 163 does not flow to the flare tip 3 and stably moves up and down I can do it.

1, in the step S15 of connecting the chain block 170, which is a horizontal pulling member, to the flared tip 3 and the extension platform 110, the first hook portion 171 of the chain block 170 And the second hook portion 173 of the chain block 170 is connected to the side plate 113 of the extension platform 110. [ The first hook portion 171 is connected to the chain block wire 171 wound on the flared tip 3 and the second hook portion 173 is connected to the lug 115 provided on the side plate 113 of the extension platform 110 .

In step S16 of opening the safety door 13 of the tip platform 10, the safety door 13 is opened so that the tip platform 10 and the portion where the safety rail 140 disposed on the extension platform 110 is disposed A certain portion of the handrail 12 corresponding to the opening of the handrail 12 is opened. This configuration allows the flare tip 3 to be smoothly transferred from the tip platform 10 to the elongated platform 110. [ When the safety door 13 performs the normal function of the flare tip 3, the handrail 12 of the tip platform 10 is completely cut off, thereby eliminating the risk of a safety accident.

In the step S20 of connecting the wire 183 of the winch 180 to the flare tip 3, the fixed platform 5, for example the winch 180 on the deck of the offshore structure, The wire 183 is pulled out from the drum 181 of the flare tip pad 3a and is passed through the pulley 185 provided on the side plate 113 of the extension platform 110 to be inserted into the flare tip pad eye 3a provided on the flare tip 3 Wire 181 is connected.

In the step S30 of separating the hydraulic jack 160 as the lifting member from the flare tip 3, in the step S30 of connecting the hydraulic jack 160 between the shifting member 150 and the flare tip 3, (135). After the hydraulic jack 160 is detached from the flare tip 3, the flared tip 3 descending operation is performed (S40).

Step S40 of lowering the flare tip 3 from the extension platform 110 includes step S41 of rotating the lower floor slabs 111a and 111b of the extension platform 110 downward through the hinge unit 114, And lowering the flared tip (3) through a space secured by rotation of the lower decks (111a, 111b) (S42).

The chain block 170 and the chain block wire wound around the flared tip 3 are rotated in a step S41 in which the lower decks 111a and 111b of the extension platform 110 are rotated downward through the hinge unit 114 175 may be performed.

During rotation of the lower decks 111a and 111b of the extension platform 110 the flare tip 3 is suspended by the wire 183 of the winch 180 carried by the pulley 185 . Thus, when the lower decks 111a and 111b rotate to secure a vertical descent space, the flared tip 3 is lowered by the lowering operation of the winch 180 and is transported to the deck of the fixed platform 5, for example, the offshore structure.

 The wire 183 of the winch 180 is then removed from the lowered flare tip of the fixed platform 5 of the offshore structure and the wire 183 of the winch 180 is connected to the new flare tip, (Step S50) of lifting a new flare tip and mounting it on the tip platform 10 is performed in the reverse order of descending order of the flare tip 3.

After the flared tip 3 replacement operation is completed, the hydraulic jack 160, the shifting member 150, the connecting bar 190, the chain block 170, the chain block wire 171, And is stored in a storage box 120 provided in the bottom plate 11 of the apparatus. Since the storage box 120 is formed of a material having excellent heat resistance, the storage box 120 can withstand the high-temperature thermal environment generated during the incineration process of the flare tower, so that the components contained therein can be safely stored.

3: Flare tip 5: Fixed platform
10: tip platform 110: extension platform
120: Storage box 130: Tip flange
140: conveying rail 150: moving member
160: lifting member (hydraulic jack) 170: horizontal pulling member (chain block)
180: winch 183: winch wire
190: Connection bar

Claims (19)

An elongated platform extending from one side of the tip platform on which the flare tip is installed and waiting the flare tip at a predetermined position when the flare tip is replaced;
A tip flange connected to a lower portion of the flare tip;
At least one feed rail provided at the bottom of the tip platform and the extension platform;
A moving member that linearly reciprocates along the feed rail;
A lifting member connected between the moving member and the tip flange to lift the flare tip upward;
A horizontal pulling member for moving the flare tip connected to the moving member between the tip platform and the extension platform; And
And a winch disposed in a fixed platform of an offshore structure disposed at a lower portion of the tip platform and having one end connected to the flare tip so that the wire can be wound or unwound. [2] The apparatus of claim 1, wherein the tip flange is a ring-shaped body coupled to a lower portion of the flared tip; And a flange portion projecting radially from the body,
Wherein the flange portion is connected to the lifting member. 3. The apparatus of claim 2, wherein the lifting member comprises a hydraulic jack,
Wherein the ram portion of the hydraulic jack is detachably connected to the flange portion of the tip flange. The hydraulic jack according to claim 3, wherein the ram portion of the hydraulic jack is formed with a lock nut portion,
A fastening hole is formed in the flange portion of the tip flange,
And the fastening bolt penetrates through the fastening hole and fastened to the fastening nut portion of the ram portion of the hydraulic jack. The hinge unit according to claim 1, wherein the extending platform comprises: a lower bottom plate rotatably connected in a downward direction through a hinge unit;
And a side plate disposed on one side of the bottom deck. The apparatus of claim 1, wherein the horizontal pulling member comprises a chain block having one hook connected to the flared tip and another hook connected to the extended platform. [2] The method of claim 1, wherein the flared tip is wound on a wire so that the one hook of the chain block is connected,
Wherein the extension platform is provided with a lug to which another hook of the chain block is connected. The replacement device of claim 1, wherein a safety door is provided at a portion of the tip platform where the extension platform is connected. The apparatus of claim 1, further comprising a connecting bar connecting the moving member. The apparatus of claim 9, wherein the tip platform is provided with a storage for storing the moving member, the horizontal pulling member, and the connecting bars. The apparatus of claim 10, wherein the storage box is made of a heat resistant material. The apparatus of claim 1, wherein the extension platform is provided with a pulley for rotatably supporting the wire drawn from the winch. The apparatus of claim 1, wherein the transfer rail is provided in a buried form so as not to protrude from the bottom of the tip platform and the extension platform. Connecting a lifting member to the flare tip to lift it to a predetermined position on the tip platform, and then transferring the lifting member from one side of the tip platform to an extended platform extending therefrom;
Connecting a wire drawn from a winch on a fixed platform disposed under the tip platform to the flared tip through a pulley provided on the extension platform;
Separating the lifting member from the flared tip; And
And lowering the flare tip from the extension platform. 15. The method of claim 14, wherein transferring the flare tip to the elongated platform comprises: connecting the elongate member to a transfer rail formed on the tip platform and the elongated platform;
Connecting a lifting member between the moving member and a tip flange provided on the flared tip;
Driving the lifting member to lift the flared tip to a predetermined position; And
And pulling the flared tip lifted to the predetermined position through the horizontal pulling member and transferring the flared tip to the center of the extension platform through the feed rail and the shifting member. 16. The method of claim 15, further comprising connecting a hook portion of the horizontal pulling member to the flared tip between the step of lifting the flare tip and the step of transporting the flare tip to the center of the extension platform, Further comprising the step of connecting a horizontal pulling member connecting said portion of said flared tip to said extension platform. 16. The method of claim 15, wherein the lowering of the flared tip comprises: rotating the lower deck of the extension platform downwardly through the hinge unit; And
And lowering the flare tip through a space secured by rotation of the lower deck of the extension platform. 16. The method of claim 15, further comprising the steps of: connecting a lifting member between the moving member and a tip flange provided on the flared tip, the fastening hole being formed in a flange portion of the tip flange and the fastening hole formed in an upper portion of the lifting portion of the lifting member Wherein the lifting member is fixedly connected to the tip flange portion without shaking by fastening the fastening bolt through the nut portion. 15. The method of claim 14, further comprising: disconnecting the wire of the winch from a flared tip lowered to the fixed platform of the offshore structure, connecting the wire of the winch to a new flare tip, Further comprising: mounting the new flared tip on the tip platform by lifting the new flared tip.

Images