KR20170053245A - Offshore structure - Google Patents

Offshore structure Download PDF

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Publication number
KR20170053245A
KR20170053245A KR1020150155488A KR20150155488A KR20170053245A KR 20170053245 A KR20170053245 A KR 20170053245A KR 1020150155488 A KR1020150155488 A KR 1020150155488A KR 20150155488 A KR20150155488 A KR 20150155488A KR 20170053245 A KR20170053245 A KR 20170053245A
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KR
South Korea
Prior art keywords
leg
securing
leg member
driving unit
securing member
Prior art date
Application number
KR1020150155488A
Other languages
Korean (ko)
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KR101803373B1 (en
Inventor
안대영
박주신
Original Assignee
삼성중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to KR1020150155488A priority Critical patent/KR101803373B1/en
Publication of KR20170053245A publication Critical patent/KR20170053245A/en
Application granted granted Critical
Publication of KR101803373B1 publication Critical patent/KR101803373B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B35/4413—Floating drilling platforms, e.g. carrying water-oil separating devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0073—Details of sea bottom engaging footing
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0073—Details of sea bottom engaging footing
    • E02B2017/0082—Spudcans, skirts or extended feet

Abstract

The present invention relates to an offshore structure. According to an embodiment, the offshore structure comprises: an offshore structure body; a leg unit installed to be lifted with respect to the offshore structure body; a lashing unit rotationally installed in the leg unit, and coming in contact with the seabed to support the leg unit on the seabed; and a drive unit installed in the leg unit, and rotating the lashing unit with respect to the leg unit. According to an embodiment of the present invention, the offshore structure body can be stably supported on the sea by the leg unit.

Description

Offshore Structures {OFFSHORE STRUCTURE}

The present invention relates to an offshore structure, and more particularly to an offshore structure having a jack-up system.

Typically, for drilling operations, a jack-up rig is moved to a defined area and then a leg of the offshore structure is lowered near the working area of the ocean floor by a jack-up system The hull and the cantilever are supported by the legs and lifted above the water surface. At this time, a spudcan exists at the lower part of the leg lowered to the sea floor, and the spud can is infiltrated into the seabed sole to fix the leg to the seabed. Since these spud cans are subjected to loads of all jack-up levers, they must be designed to withstand high loads. Even if the sprue can is penetrated to the bottom of the sea bed to fix the leg to the sea floor, the restraint condition of the leg at the seabed surface can have a state in which the moment can not be stably secured due to digging and algae. If the moment of the leg is not properly secured, the legs and oceans can not be stably supported, which can lead to a significant disruption to marine operations.

An object of the present invention is to provide an offshore structure in which the main body of the offshore structure can be stably supported in the marine state by the leg portions.

The problems to be solved by the present invention are not limited to the above-mentioned problems. Other technical subjects not mentioned will be apparent to those skilled in the art from the description below.

An offshore structure according to one aspect of the present invention includes an offshore structure body; A leg portion installed to move up and down with respect to the main body of the offshore structure; A high shear portion rotatably installed on the leg portion and contacting the bottom of the sea so as to support the leg portion on the bottom surface; And a driving part installed on the leg part and rotating the securing part against the leg part.

Wherein the leg portion includes a first leg member and a second leg member that are installed to move up and down with respect to the main body of the offshore structure and the securing portion is provided on a side portion of the first leg member facing the second leg member, A first retention member rotatably installed around a lower portion of the one leg member; And a second retention member provided on a side portion of the second leg member facing the first leg member and rotatably installed around a lower portion of the second leg member.

The offshore structure may further include a fixing portion which is provided on at least one of the first and second securing members and fixes or releases the first securing member and the second securing member.

The marine structure includes a first spud can disposed at a lower end of the first leg member; And a second spur can disposed at a lower end portion of the second leg member, wherein the driving portion is provided on the first spur can side of the first leg member, A first driving unit for rotating the first driving unit about the center axis; And a second driving unit installed on the second spur can side of the second leg member and rotating the second securing member around the lower portion of the second leg member.

Wherein the leg portions further include a third leg member and a fourth leg member provided on both lateral sides of the main body of the offshore structure and the securing portion includes a third leg member disposed on the side portion of the third leg member facing the fourth leg member, Absence of retention; And a fourth securing member provided on a side surface of the fourth leg member facing the third leg member, wherein the driving unit rotates the third securing member about the longitudinal direction of the third leg member A third driver; And a fourth driving unit for rotating the fourth securing member about the longitudinal direction of the fourth leg member, wherein the fourth securing member is provided on at least one of the third securing member and the fourth securing member, And a fixing unit for fixing or releasing between the first and second securing members.

Wherein the driving unit includes a first elastic member provided on the first leg member and configured to swing or unwind a first wire fixed to the end side of the first elastic member to rotate the first elastic member about the lower portion of the first leg member 1 driver; And a second driving unit installed on the second leg member and winding or loosening a second wire fixed to the end side of the second securing member to rotate the second securing member about the lower portion of the second leg member .

According to the embodiment of the present invention, the main body of the offshore structure can be stably supported in the marine state by the leg portions.

The effects of the present invention are not limited to the effects described above. Unless stated, the effects will be apparent to those skilled in the art from the description and the accompanying drawings.

1 is a side view schematically illustrating an offshore structure 100 according to an embodiment of the present invention.
2 is an enlarged view of the 'A' portion shown in FIG.
FIG. 3 is a view showing a state where the high-shear portion 130 constituting the offshore structure according to the embodiment of the present invention is rotated to the sea floor.
4 is a cross-sectional view taken along the line BB 'in Fig.
5 is a longitudinal sectional view of the portion 'C' in FIG.
6 is a view showing an offshore structure according to another embodiment of the present invention.
7 is a plan view schematically illustrating an offshore structure according to another embodiment of the present invention.
FIG. 8 is a front view schematically showing an offshore structure according to the embodiment of FIG. 7; FIG.
9 is a longitudinal sectional view of the 'D' portion shown in FIG.

Other advantages and features of the present invention and methods for accomplishing the same will be apparent from the following detailed description of embodiments thereof taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and the present invention is only defined by the scope of the claims. Although not defined, all terms (including technical or scientific terms) used herein have the same meaning as commonly accepted by the generic art in the prior art to which this invention belongs. A general description of known configurations may be omitted so as not to obscure the gist of the present invention. In the drawings of the present invention, the same reference numerals are used as many as possible for the same or corresponding configurations. To facilitate understanding of the present invention, some configurations in the figures may be shown somewhat exaggerated or reduced.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises", "having", or "having" are intended to specify the presence of stated features, integers, steps, operations, components, Steps, operations, elements, parts, or combinations thereof, whether or not explicitly described or implied by the accompanying claims.

FIG. 1 is a side view schematically showing an offshore structure 100 according to an embodiment of the present invention, and FIG. 2 is an enlarged view of an 'A' portion shown in FIG. 1 and 2, an offshore structure 100 according to an embodiment of the present invention includes an offshore structure body 110, a leg portion 120, a thick portion 130, and a driving portion 140 .

The offshore structure 100 is equipped with a terminal facility for exploration, sampling, drilling, processing, refining, rehabilitation, wind power generation facilities, storage and transportation of crude oil, gas and submarine mineral, You can do the work. 1, the offshore structure 100 is provided for drilling crude oil from a wellhead through a riser pipe 40, but the present invention is not limited to drilling crude oil through a riser pipe 40, It can be applied to offshore structures and is not limited to any specific use or purpose.

The offshore structure 100 may be a jack-up platform or a wind turbine installation vessel for crude oil drilling, but the present invention may be applied to various marine structures not illustrated. The leg portion 120 is installed to ascend and descend with respect to the offshore structure body 110. The leg portion 120 includes a plurality of leg members 122, The offshore structure body 110 floats on the sea before being jacked up by the leg portions 122 and is supported by the leg portions 120 after jacking up by the leg portions 120.

The leg members 122 and 124 are installed on the offshore structure body 110 so as to be movable up and down. The offshore structure body 110 includes an elevation driving device (not shown) for relatively moving the leg members 122 and 124 in the vertical direction. A control unit (not shown) for controlling the operation of the driving device for raising and lowering the leg members 122 and 124 may be provided on the main body 110 of the offshore structure. The leg members 122, 124 may be provided in any suitable number necessary to support the offshore structure body 110.

The driving device for lifting and lowering the leg members 122 and 124 may include a jacking unit having a motor, a gear, and the like. The operation of the jacking unit allows the leg members 122 and 124 to move up and down with respect to the offshore structure body 110 or the offshore structure body 110 to move up and down with respect to the leg members 122 and 124. [ The jacking unit may include, for example, a pinion gear that engages with a rack gear formed in the leg members 122 and 124, and a motor to drive the pinion gear. The relative movement between the main body 110 of the offshore structure and the leg members 122 and 124 can be performed in the vertical direction by interlocking the pinion and the rack.

The plurality of leg members 122, 124 are lifted and lowered according to the topography of the seabed 50 to support the marine structure body 110 relative to the seabed 50. The leg members 122 and 124 are installed to penetrate the offshore structure body 110 in the vertical direction and are formed to have a rigidity enough to bear the load of the offshore structure body 110 in a jack-up state. The leg members 122 and 124 may be formed in a cylindrical shape, a square truss structure, a triangular truss structure, or various other shapes. The leg members 122 and 124 may be lowered toward the sea floor side with respect to the offshore structure body 110 to lift the offshore structure body 110 including the hull and the cantilever portion.

Spurred cans 122a and 124a are provided at the lower ends of the leg members 122 and 124, respectively. The spurd cans 122a and 124a may be provided to stably secure the lower ends of the leg members 122 and 124 to the seabed 50. The spuddans 122a and 124a may be penetrated into the seabed 50 in a jack-up mode. The spurd cans 122a and 124a may be formed to have a planar area wider than the planar area of the leg members 122 and 124 for stable fixation of the leg members 122 and 124. [

The spud cans 122a and 124a penetrate below the sea bed so as to fix the leg members 122 and 124 to the seabed so that the restraint condition of the leg members 122 and 124 on the seabed surface is stabilized . The greater the moment of the leg members 122 and 124 is restrained by the seabed, the more stable the leg members 122 and 124 and the main body 110 of the offshore structure can be supported. The embodiments described below are for stabilizing the moment of the leg members 122 and 124 at the seabed so that the marine structure body 110 supported by the leg members 122 and 124 can secure a certain positioning will be.

The thick portion 130 is rotatably mounted on the leg portion 120. The thick portion 130 can contact the bottom surface of the sea bed to support the leg portion 120 on the seafloor. In one embodiment, the thickened portion 130 may include a first securing member 132 and a second securing member 134. The first retention member 132 may be installed on the side portion 122b of the first leg member 122 facing the second leg member 124. [ The second securing member 134 may be installed on the side portion 124b of the second leg member 124 facing the first leg member 122. [ The first securing member 132 is rotatably installed around the lower portion of the first leg member 122. The second securing member 134 is rotatably installed around the lower portion of the second leg member 124.

The driving part 140 is installed on the leg part 120 so as to rotate the thick part 130 relative to the leg part 120. The driving unit 140 may include a first driving unit 142 for driving the first securing member 132 and a second driving unit 144 for driving the second securing member 134. [ The first driving part 142 may be provided on the first spur can 122a side of the first leg member 122 to rotate the first securing member 132 around the lower part of the first leg member 122 . The second driving unit 144 may be provided on the second spur can 124a side of the second leg member 124 to rotate the second securing member 134 about the lower portion of the second leg member 124 . The driving unit 140 may be provided, for example, as a driving motor / speed reducer, and a pulley / belt for transmitting power of the driving motor may be provided. However, the driving unit 140 is not limited to the illustrated example and can be used without any particular limitation as long as the leg unit 120 can be rotated.

FIG. 3 is a view showing a state in which the thick portion 130 constituting an offshore structure according to an embodiment of the present invention is pivoted to the sea floor. FIG. 4 is a sectional view taken along line BB ' 4 is a longitudinal sectional view taken along the line C 'of FIG. When the spud cans 122a and 124a penetrate the seabed, the first securing member 132 is pivoted toward the sea floor by the driving unit 140 about the lower end of the first leg member 122, and the second leg member 124, the second securing member 134 pivots toward the sea floor surface. Thus, as shown in Fig. 3, the first leg member 122 and the second leg member 124 are in contact with the sea floor.

5, the first securing member 132 and the second securing member 134 are provided with a fixing portion 150. As shown in FIG. The fixing unit 150 can fix or release the first securing member 132 and the second securing member 134. [ In one embodiment, the fixing portion 150 may be provided as a hydraulic cylinder formed in the space portion 132a recessed on the end side of the first securing member 132. [ The fixing portion 150 draws the rod 152 of the hydraulic cylinder into the space portion 134a formed on the end side of the second securing member 142 and presses the first securing member 132 and the second securing member 134 ) Can be fixed. However, the fixing unit 150 is not limited to the illustrated example, and can be used without any particular limitation as long as it can fix the first and second securing members 132 and 134. [

According to this embodiment, the securing members 132 and 134 come into contact with the bottom surface to support the leg members 122 and 124 together with the spud cans 122a and 124a, and the tip ends of the two securing members 132 and 134 are fixed to the fixing unit 150 , And the structural stability of the leg members 122 and 124 can be secured by firmly supporting the two leg members 122 and 124 in the lateral direction.

6 is a view showing an offshore structure according to another embodiment of the present invention. In describing the embodiment of FIG. 6, the same or similar elements as those of the above-described embodiment may be omitted from the overlapping description. 6, the driving unit of the offshore structure includes a first driving unit 146 installed on the first leg member 122 to rotate the first securing member 132, a second driving unit 146 installed on the second leg member 124, And a second driving unit 148 that rotates the securing member 134. [

The first securing member 132 is rotatably installed in the first leg member 132 by a bearing 132b. The second securing member 134 is rotatably mounted to the second leg member 134 by a bearing 134b. The first driving unit 146 winds or unwinds the wire W fixed to the end side of the first securing member 132 by the winch so that the first securing member 132 moves the lower portion of the first leg member 132 to the center . The second driving unit 148 winds or unwinds the wire W fixed to the end side of the second securing member 134 by the winch so that the second securing member 134 moves to the center of the lower portion of the second leg member 134 . However, the driving unit 140 is not limited to the illustrated example, and may be provided as another type of driving system capable of pivoting the leg unit 120.

FIG. 7 is a plan view schematically illustrating an offshore structure according to another embodiment of the present invention, and FIG. 8 is a front view schematically showing an offshore structure according to the embodiment of FIG. In describing the embodiments of FIGS. 7 and 8, the same or similar elements as those of the above-described embodiments may be omitted from the overlapping description. 7 and 8, the leg portion includes a plurality of leg members 120a, b, 120c, d provided on both sides in the lateral direction Y to the offshore structure body 110. [ The third securing member 162 is provided on the side portions 122c and 124c of the third leg members 120a and 120c opposite to the fourth leg members 120b and 120c and the third leg members 120a and 120b The fourth securing member 164 is provided on the side portions 122d and 124d of the opposing fourth leg members 120b and 120d.

The driving unit is configured to move the third driving unit 172 and the fourth securing member 164 which rotate the third securing member 162 about the longitudinal direction of the third leg members 120a and 120c to the fourth leg members 120b and 120c And a fourth driving unit 174 for rotating the first driving unit 174 about the longitudinal direction. The third and fourth drive units 172 and 174 may be provided as drive motors / decelerators, for example, and pulleys / belts may be provided for transmitting the power of the drive motors. However, the driving unit is not limited to the illustrated example, and can be used without any particular limitation as long as it can rotate the leg members 120a to 120d.

9 is a longitudinal sectional view of the 'D' portion shown in FIG. Referring to Fig. 9, the third securing member 162 and the fourth securing member 164 are provided with a fixing portion 180. Fig. The fixing part 180 can fix or release the third securing member 162 and the fourth securing member 164 between the third securing member 162 and the fourth securing member 164. In one embodiment, the fixing portion 180 may be provided as a hydraulic cylinder formed in the space portion 162a recessed on the end side of the third securing member 162. [ The fixing portion 180 draws the rod 182 of the hydraulic cylinder into the space portion 164a recessed on the end side of the fourth securing member 164 so that the third securing member 162 and the fourth securing member 164 ) Can be fixed. However, the fixing portion 180 is not limited to the illustrated example, and can be used without any particular limitation as long as it can fix the third and fourth securing members 162 and 164.

According to the embodiment shown in Figs. 7 to 9, the securing members 132 and 134 secure the moment, and between the leg members 120a and 120b (120c and 120d) on both sides in the transverse direction are secured by the securing members 162 and 164 And the structural stability of the leg portion 120 can be further improved by fixing the tip ends of the securing members 162 and 164 by the fixing portion 180. [

It is to be understood that the above-described embodiments are provided to facilitate understanding of the present invention, and do not limit the scope of the present invention, and it is to be understood that various modifications are possible within the scope of the present invention. It is to be understood that the technical scope of the present invention should be determined by the technical idea of the claims and the technical scope of protection of the present invention is not limited to the literary description of the claims, To the invention of the invention.

100: offshore structure 110: offshore structure body
120: leg portions 122, 124: leg member
130: high thin part 132: first reticulate member
134: second securing member 140:
142: first driving part 144: second driving part
150: fixing portion 162: third fixing member
164: fourth retention member 172, 174:
180:

Claims (6)

main body;
A leg portion installed to move up and down with respect to the main body;
A high shear portion rotatably installed on the leg portion and contacting the bottom of the sea so as to support the leg portion on the bottom surface; And
And a driving part installed on the leg part and rotating the securing part against the leg part. The method according to claim 1,
Wherein the leg portion includes a first leg member and a second leg member installed to raise and lower the body,
In the securing portion,
A first retention member provided at a side portion of the first leg member facing the second leg member and rotatably installed around a lower portion of the first leg member; And
And a second securing member provided on a side portion of the second leg member facing the first leg member and rotatably installed around a lower portion of the second leg member. 3. The method of claim 2,
Further comprising a fixing portion provided on at least one of the first and second securing members for fixing or releasing between the first securing member and the second securing member. 3. The method of claim 2,
A first spud can disposed at a lower end of the first leg member; And
And a second spud can disposed at a lower end of the second leg member,
The driving unit includes:
A first driving unit installed on the first spur can side of the first leg member to rotate the first securing member about the lower portion of the first leg member; And
And a second driving unit installed on the second spur can side of the second leg member to rotate the second securing member about the lower portion of the second leg member. 5. The method of claim 4,
Wherein the leg portions further include a third leg member and a fourth leg member provided on both sides of the body in the transverse direction,
In the securing portion,
A third retention member provided on a side portion of the third leg member facing the fourth leg member; And
Further comprising a fourth securing member provided on a side surface portion of the fourth leg member facing the third leg member,
The driving unit includes:
A third driving unit that rotates the third securing member about the longitudinal direction of the third leg member; And
And a fourth driving unit for rotating the fourth securing member about the longitudinal direction of the fourth leg member,
Further comprising a fixing portion provided on at least one of said third and fourth securing members and fixing or releasing between said third securing member and said fourth securing member. 3. The method of claim 2,
The driving unit includes:
A first driving unit installed on the first leg member and winding or unwinding a first wire fixed to an end side of the first securing member to rotate the first securing member about a lower portion of the first leg member; And
And a second driving unit installed on the second leg member and winding or unwinding a second wire fixed to the end side of the second securing member to rotate the second securing member about the lower portion of the second leg member Marine structures.
KR1020150155488A 2015-11-06 2015-11-06 Offshore structure KR101803373B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150155488A KR101803373B1 (en) 2015-11-06 2015-11-06 Offshore structure

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190080519A (en) * 2017-12-28 2019-07-08 삼성중공업 주식회사 Collision test apparatus for leg of offshore structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110173397A (en) * 2019-05-29 2019-08-27 中国十七冶集团有限公司 A kind of installation method partly latent for refuting crawler crane sea large-scale wind driven generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190080519A (en) * 2017-12-28 2019-07-08 삼성중공업 주식회사 Collision test apparatus for leg of offshore structure

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