KR101864748B1 - Offshore structure - Google Patents

Offshore structure Download PDF

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Publication number
KR101864748B1
KR101864748B1 KR1020170049059A KR20170049059A KR101864748B1 KR 101864748 B1 KR101864748 B1 KR 101864748B1 KR 1020170049059 A KR1020170049059 A KR 1020170049059A KR 20170049059 A KR20170049059 A KR 20170049059A KR 101864748 B1 KR101864748 B1 KR 101864748B1
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KR
South Korea
Prior art keywords
jack case
rack
rack guide
main body
jack
Prior art date
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KR1020170049059A
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Korean (ko)
Inventor
박주신
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삼성중공업(주)
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Priority to KR1020170049059A priority Critical patent/KR101864748B1/en
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Publication of KR101864748B1 publication Critical patent/KR101864748B1/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
    • E02B17/0034—Maintenance, repair or inspection of offshore constructions
    • 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
    • E02B17/0818—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with racks actuated by pinions
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • E21B15/02—Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/12—Underwater drilling

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Wind Motors (AREA)

Abstract

An offshore structure having a new jacking system is disclosed. An offshore structure according to an embodiment of the present invention includes a main body; A leg which is installed to be movable in a vertical direction with respect to the main body and supports the main body; And a jacking unit provided on the main body and guiding the vertical movement of the pillars of the legs. The jacking unit includes a jack case into which the pillar portion is inserted and a rack guide portion provided in the jack case. The jack case has a rear portion opened in a direction opposite to the leg, and the rack guide portion is vertically formed on two opposing inner side surfaces of the jack case to guide the rack gear of the pillar portion. According to the embodiment of the present invention, efficient air cooling and maintenance / repair are possible through the open rear portion of the jack case. Further, the position of the cord portion (column portion, rack gear) of the leg can be efficiently and accurately managed.

Description

Offshore Structures {OFFSHORE STRUCTURE}

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

A jack-up rig is an offshore structure that performs drilling in a defined area. It has a leg and jacking system to lift the hull and cantilever over the surface of the water. . For the lifting of the legs, the jacking system is provided with a jackcase. In order to guide the movement of the legs stably, the side wall and the rear face of the jack case are designed to have small tolerances. Thus, when the legs are inclined or biased, the chord of the legs may strike against the inner wall surface of the jack case, causing damage to the rack gears of the legs or causing structural defects in the jack case.

In addition, due to the characteristics of the jack-up league, marine life is adhered to and adhered to the leg during a long time of construction and mining of the well in a predetermined sea area. When the leg moves in a state where the adherent is fixed, Noise occurs due to interference between the jack case and the jack case, and the by-product enters the equipment and acts as a cause of failure. The conventional jack case has a 'C' shaped channel structure with the rear portion blocked. Therefore, it is impossible to access the inside of the jack case through the rear portion of the jack case for maintenance / repair of the leg or jacking system.

An object of the present invention is to provide an offshore structure capable of efficient air cooling and maintenance / repair through an open rear portion of a jack case.

It is another object of the present invention to provide an offshore structure capable of efficiently and precisely managing the position of a cord portion (a column portion, a rack gear) of a leg.

It is also an object of the present invention to provide an offshore structure in which a guide member damaged by friction with a rack gear can be easily replaced.

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 an aspect of the present invention includes a main body; A leg which is installed to be movable in a vertical direction with respect to the main body and supports the main body; And a jacking unit provided on the main body and guiding the vertical movement of the pillars of the legs, wherein the jacking unit includes: a jack case having the column portion inserted therein and the rear portion opposite to the leg opened; And a rack guide portion formed on each of two opposite inner side surfaces of the jack case in a vertical direction to guide the rack gear of the pillar portion.

The jack case includes: a pair of vertical towers opposed to each other with the pillar portion therebetween; And a support member connecting the pair of vertical towers, wherein the rack guide portion may be formed in each of the pair of vertical towers.

The jacking unit may further include a guide rail formed in a horizontal direction on an inner surface of the jack case, and the rack guide portion may be coupled to the guide rail to adjust its position along the guide rail.

The rack guide unit includes a rack guide body coupled to the guide rails; And a guide member slidably detachable from the rack guide body.

The jacking unit may further include a stopper formed on an inner surface of the jack case to limit a longitudinal position of the rack guide unit.

The jacking unit may further include a stopper driving unit for adjusting a positional tolerance of the column by adjusting a position of the stopper in a horizontal direction.

The jacking unit may include: a sensor unit installed in the jack case to sense a position of the pillar; And a driving unit for adjusting a position of the rack guide unit according to a measured value of the sensor unit.

The offshore structure includes a maintenance platform mounted on a rear portion of the jack case and accessible to the inside of the jack case through an open rear portion of the jack case; And a moving unit for moving the maintenance platform in the vertical direction along the jack case.

According to an embodiment of the present invention, an open structure of an efficient air-cooling and maintenance / maintenance is provided through the open rear portion of the jack case.

Further, according to the embodiment of the present invention, it is possible to efficiently and accurately manage the position of the cord portion (column portion, rack gear) of the leg.

Further, according to the embodiment of the present invention, the guide member damaged by friction with the rack gear can be easily replaced.

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 according to an embodiment of the present invention.
2 is a plan view of a jacking system constituting an offshore structure according to an embodiment of the present invention.
3 is a perspective view of a jacking unit constituting an offshore structure according to an embodiment of the present invention.
4 is a plan view of a jacking unit constituting an offshore structure according to an embodiment of the present invention.
5 is an enlarged view of a portion 'B' in FIG.
FIG. 6 is a conceptual diagram showing the sensing of the position of the pillar in the sensor unit installed in the rack guide unit according to the embodiment of the present invention.
7 is a view showing a jack case and a rack guide unit constituting an offshore structure according to another embodiment of the present invention.
8 is a rear view of an offshore structure according to another embodiment of the present invention.
Figure 9 is a side view of an offshore structure according to the embodiment of Figure 8;
Figure 10 is a top view of an offshore structure according to the embodiment of Figure 8;

Other advantages and features of the present invention and methods of achieving them will be apparent by referring to the embodiments described hereinafter in detail with reference to 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of 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.

The offshore structure according to the embodiment of the present invention has a new type of jacking system including a jack case having a rear opened portion and a rack guide portion formed on the jack case to guide the rack gear of the pillar portion. According to the embodiment of the present invention, the open rear portion of the jack case provides an advantage of efficient air cooling and maintenance / repair.

The marine structure according to the embodiment of the present invention can adjust the positions of the rack guide portion and the stopper that limits the position of the rack guide portion in the forward and backward directions and can efficiently and accurately manage the positions of the cords (pillars and rack gears) . In addition, when the guide member of the rack guide portion is damaged by friction with the rack gear, a new guide member can be replaced by a slide detachable type.

1 is a side view schematically illustrating an offshore structure 100 according to an embodiment of the present invention. The offshore structure 100 according to the present embodiment includes a main body 110, a plurality of legs 120, and a jacking system 130.

The main body 110 is equipped with terminal equipment for exploration, sampling, drilling, processing, refining, regeneration, wind power generation facilities, storage and transportation of crude oil, gas and submarine minerals, Can be performed.

In the example shown in Figure 1, the body 110 is provided to drill crude oil from a wellhead through a riser pipe 40, but the present invention is not limited to a marine having various purposes and uses Structure, and is not limited to a specific use or purpose.

The main body 110 may be a jack-up platform for crude oil drilling or a wind turbine installation vessel, but may be provided with various marine structures without limitation.

The main body 110 is provided so as to float in the marine state without being jacked up by the plurality of legs 120 and is supported by the plurality of legs 120 when jacked up by the legs 120 .

The legs 120 are installed to be movable in the vertical direction through the main body 110. The legs 120 can be lowered toward the sea floor surface with respect to the main body 110 to lift the main body 110 including the hull and the cantilever up to the water surface. At least three legs 120 may be formed to support the body 110.

The jacking system 130 is installed in the main body 110 and is provided to relatively move the legs 120 in the vertical direction. The main body 110 may be provided with a control unit (not shown) for controlling the operation of the driving device for lifting and lowering the legs 120.

2 is a plan view of a jacking system constituting an offshore structure according to an embodiment of the present invention. The legs 120 may be formed of three or more cords and each cords includes a column 121 and a rack gear 123 formed on both sides of the column 121. The pillars 121 are connected by a bracing 122.

The jacking system 130 may include a jacking unit formed for each of the pillars 121 of the leg 120. Although not shown, a means such as a pinion gear for raising and lowering the leg 120 and a motor for driving the pinion gear are provided in the jacking unit by engaging with and rotating the rack gear 123 of the leg 120. The operation of the jacking unit allows the legs 120 to move up and down with respect to the main body 110 or the main body 110 to move up and down with respect to the legs 120. [

The legs 120 are formed to have a rigidity enough to withstand the load of the main body 110 in a jack-up mode. The legs 120 may be formed in a cylindrical shape, a square truss structure, a triangular truss structure, or various other shapes. In the illustrated example, the legs 120 are made up of three chords, but may be provided with four or more codes, and the jacking units constituting the jacking system 130 may be provided as many as the number of the codes constituting the legs .

The conventional jack case has a channel structure of approximately 'C' shape for guiding a cord of the leg, and the jack case is not opened to open the air. Also, the conventional jack case has a structure in which the rear portion is clogged and can not enter the jack case through the rear portion. The embodiment of the present invention described below is for solving the problems of the conventional jack case structure.

3 is a perspective view of a jacking unit constituting an offshore structure according to an embodiment of the present invention. 4 is a plan view of a jacking unit constituting an offshore structure according to an embodiment of the present invention. Referring to Figs. 3 and 4, a jacking unit constituting the jacking system 130 is provided to guide the vertical movement of the posts 121 constituting the legs 120. As shown in Fig. To this end, the jacking unit includes a jack case 131, 132, 133 into which the pillar 121 is inserted, a rack guide portion 134, a guide rail 135, and stoppers 136a, 136b do.

In the embodiment of the present invention, the jack cases 131, 132, and 133 are provided in a structure in which the rear portion in the direction opposite to the leg is opened. In one embodiment, the jack case includes a pair of vertical towers 131 and 132 opposed to each other with the pillar 121 interposed therebetween, and a support member 133 connecting the pair of vertical towers 131 and 132, do. In one embodiment, the support member 133 may be provided with a bracing member.

The pair of vertical towers 131 and 132 can be disposed in a direction facing the rack gear 123. Hereinafter, the direction (left-right direction) in which the first vertical tower 131 and the second vertical tower 132 are sequentially arranged is referred to as a first direction X and a direction perpendicular to the first direction X (Vertical direction) perpendicular to the first direction X and the second direction Y is referred to as the third direction Z in the second embodiment of the present invention, .

The rack guide portion 134 is formed in the third direction Z in the opposite two inner surfaces of the jack case, that is, on the side surface of the first vertical tower 131 and the side surface of the second vertical tower 132, 121 to guide the rack gear 123 thereof.

5 is an enlarged view of a portion 'B' in FIG. 3 to 5, the guide rails 135 may be provided so that the position of the rack guide portion 134 can be adjusted. The guide rails 135 are formed in the first direction X on the inner surfaces of the first vertical tower 131 and the second vertical tower 132 constituting the jack case, respectively. The rack guide portion 134 is coupled to the guide rail 135 and can be adjusted in position along the guide rail 135 in the first direction X. [

The rack guide portion 134 may include a rack guide body 134a coupled to the guide rail 135 and a guide member 134b slidably coupled to the rack guide body 134a. A groove portion 134c for guiding the rack gear 123 may be formed on the guide member 134b.

In one embodiment, the guide member 134b may be provided with a steel material having a low coefficient of friction with the rack gear 123 and excellent wear resistance. The guide member 134b may be slidably inserted in the rack guide body 134a in the third direction Z and then further coupled with a bolt or the like.

The stoppers 136a and 136b are formed on the respective vertical towers 131 and 132 to limit the longitudinal position of the rack guide portion 134. [ In one embodiment, the front stopper 136a is provided in the third direction Z on the front side of the vertical towers 131 and 132 with respect to the second direction Y, to limit the forward departure of the rack guide portion 134 do. The rear stopper 136b is provided in the third direction Z on the rear side of the vertical towers 131 and 132 with respect to the second direction Y to limit the rearward departure of the rack guide portion 134. [

The position of the rack guide portion 134 can be adjusted between the front stopper 136a and the rear stopper 136b so that the position of the post 121 can be adjusted. Further, since the front stopper 136a and the rear stopper 136b have a structure that facilitates positional adjustment, the positional tolerance of the post 121 can be adjusted by adjusting the positions of the stoppers 136a and 136b.

In one embodiment, the rack guide portion 134 can be manually positioned by the contact of the rack gear 123. The rack guide portion 134 may be configured to actively adjust the position of the rack guide portion 134 in accordance with the position of the pillar portion 121 or the rack gear 123. [ For example, it may be provided so as to move the rack guide portion 134 in the second direction Y by means of a hydraulic cylinder or the like. In this case, the position of the leg 120 can be adjusted by adjusting the position of the rack guide portion 134.

FIG. 6 is a conceptual diagram showing the sensing of the position of the pillar in the sensor unit installed in the rack guide unit according to the embodiment of the present invention. 7 is a view showing a jack case and a rack guide unit constituting an offshore structure according to another embodiment of the present invention. In describing the embodiments of Figs. 6 and 7, redundant explanations can be omitted for the same configuration as the above-described embodiment.

6 and 7 are different from the previously described embodiments in that they further include the sensor unit 140 and the stopper driving units 150a and 150b. In one embodiment, the sensor unit 140 is installed in the rack guide unit 134 to sense the position of the pillar 121 and the rack gear 123. The sensor unit 140 may be provided by means of a laser distance sensor or the like which measures the distance to the measurement point SP of the rack gear 123. [

The stopper driving parts 150a and 150b can adjust the position tolerance of the column part 121 by adjusting the positions of the stoppers 136a and 136b in the second direction Y according to the measured value of the sensor part 140. [

For example, as the amount of marine life attached to the leg increases as the drilling operation lasts for a long time, the distance between the stoppers 136a, 136b of the legs can be increased. Alternatively, when a large noise is generated due to friction between the rack guide portion 134 and the rack gear 123, the distance between the stoppers 136a and 136b may be increased to reduce the noise.

On the contrary, when it is necessary to more precisely control the elevating operation of the legs, the distance between the stoppers 136a and 136b may be reduced to reduce the position tolerance.

Alternatively, it is possible to adjust the position of the rack guide part 134 in the second direction Y according to the measured value of the sensor part 140. For example, the rack guide portion 134 may be moved in the direction in which the rack gear 123 is moved, or the rack guide portion 134 may be moved in the direction opposite to the movement of the rack gear 123, Can be adjusted.

FIG. 8 is a rear view of a marine structure according to another embodiment of the present invention, FIG. 9 is a side view of the marine structure according to the embodiment of FIG. 8, to be. In describing the embodiments of Figs. 8 to 10, the same structures as those of the above-described embodiments may be omitted.

The embodiment of FIGS. 8 to 10 differs from the above-described embodiment in that it further includes the rail portions 161 and 162, the maintenance platform 170, and the moving portion 180. The rail portions 161 and 162 may be formed in the third direction Z on the rear portion of the vertical towers 131 and 132 to guide the lifting and lowering of the maintenance platform 170.

The maintenance platform 170 is liftably mounted on the rear portion of the jack case. The maintenance platform 170 is provided so that an operator can be boarded, and maintenance equipment and parts for replacement can be mounted. The maintenance platform 170 may be coupled to the rails 161 and 162 and may be raised and lowered along the rails 161 and 162.

The moving part 180 may move the maintenance platform 170 in the vertical direction along the vertical towers 131 and 132. The moving part 180 may be provided to move the maintenance platform 170 in a variety of driving manners, such as rack / pinion engagement, screw / motor engagement, hydraulic cylinders, and the like.

8 to 10, the maintenance platform 170 facilitates maintenance / repair of the legs and the jacking system by easily approaching the inner space of the jack case through the open rear portion of the jack case can do.

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 modified embodiments are also 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, Of the invention.

100: offshore structure 110: main body
120: leg 121:
123: Rack gear 130: Jacking system
131: first vertical tower 132: second vertical tower
133: support member 134: rack guide portion
134a: rack guide body 134b: guide member
134c: groove portion 135: guide rail
136a: front stopper 136b: rear stopper
140: sensor part 150a, 150b: stopper driving part
161,162: Redemption 170: Maintenance platform
180:

Claims (8)

main body;
A leg which is installed to be movable in a vertical direction with respect to the main body and supports the main body; And
And a jacking unit provided on the main body for guiding the vertical movement of the pillars of the leg,
The jacking unit includes:
A jack case into which the post is inserted and a rear portion opposite to the leg is opened; And
And a rack guide portion formed on each of two opposing inner side surfaces of the jack case in a vertical direction to guide the rack gear of the pillar portion,
The jack case includes:
A pair of vertical towers opposed to each other with the pillar portion therebetween; And
And a plurality of bracing members connecting the pair of vertical towers,
Wherein the jack case is configured to be air cooled through an open space between the plurality of bracing members. The method according to claim 1,
And the rack guide portion is formed on the pair of vertical towers, respectively. The method according to claim 1,
The jacking unit includes:
And a guide rail formed on an inner surface of the jack case in a horizontal direction,
Wherein the rack guide portion is coupled to the guide rail and is adjustable in position along the guide rail. The method of claim 3,
The rack guide portion
A rack guide body coupled to the guide rail; And
And a guide member slidably attachable to and detachable from the rack guide body. The method of claim 3,
The jacking unit includes:
And a stopper formed on an inner surface of the jack case to limit the forward and backward positions of the rack guide portion. 6. The method of claim 5,
The jacking unit includes:
And a stopper driving unit for adjusting a position tolerance of the column by adjusting a position of the stopper in a horizontal direction. The method of claim 3,
The jacking unit includes:
A sensor unit installed in the jack case to sense a position of the pillar; And
And a driving unit for adjusting a position of the rack guide unit according to a measured value of the sensor unit. The method according to claim 1,
A maintenance platform mounted on a rear portion of the jack case and accessible to the inside of the jack case through an open rear portion of the jack case; And
And a moving part for moving the maintenance platform vertically along the jack case.
KR1020170049059A 2017-04-17 2017-04-17 Offshore structure KR101864748B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200056208A (en) * 2018-11-14 2020-05-22 삼성중공업 주식회사 Apparatus for jacking house and floating structure having the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140008574A (en) * 2012-07-06 2014-01-22 삼성중공업 주식회사 Floating structure and leg thereof
KR20160002158U (en) * 2014-12-12 2016-06-23 삼성중공업 주식회사 Appatus for launching lifesaving equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140008574A (en) * 2012-07-06 2014-01-22 삼성중공업 주식회사 Floating structure and leg thereof
KR20160002158U (en) * 2014-12-12 2016-06-23 삼성중공업 주식회사 Appatus for launching lifesaving equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200056208A (en) * 2018-11-14 2020-05-22 삼성중공업 주식회사 Apparatus for jacking house and floating structure having the same
KR102438697B1 (en) * 2018-11-14 2022-08-31 삼성중공업 주식회사 Apparatus for jacking house and floating structure having the same

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