WO2010050680A2 - 문풀 및 이를 구비한 시추선 - Google Patents
문풀 및 이를 구비한 시추선 Download PDFInfo
- Publication number
- WO2010050680A2 WO2010050680A2 PCT/KR2009/005703 KR2009005703W WO2010050680A2 WO 2010050680 A2 WO2010050680 A2 WO 2010050680A2 KR 2009005703 W KR2009005703 W KR 2009005703W WO 2010050680 A2 WO2010050680 A2 WO 2010050680A2
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- WO
- WIPO (PCT)
- Prior art keywords
- space
- drilling
- drillship
- drilling line
- door
- Prior art date
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B2003/147—Moon-pools, e.g. for offshore drilling vessels
Definitions
- the present invention relates to a door pool and a drilling vessel having the same. More specifically, the present invention relates to a door pool and a drilling vessel having the same to change the structure of the door pool to reduce vibration and resistance caused by the flow of seawater inside the door pool during operation of the drilling vessel.
- drillships have been developed that are equipped with advanced drilling equipment and made closer to ships so that they can sail by their own power and are used for underwater drilling.
- Such drilling vessels should be designed to have optimal navigational performance as well as drilling performance due to the conditions that require frequent relocation for small oil field development.
- the drilling ship is equipped with a large opening (hereinafter referred to as a moonpool) for drilling down the drilling pipe, which is indispensable for the purpose of the drilling ship, but it is very disadvantageous in terms of speed performance during navigation.
- a moonpool a large opening for drilling down the drilling pipe
- the attachments attached to the inside of the door pool, the bottom attachments around the door pool, and the movable switchgear inside the door pool have been devised and put into practical use.
- the internal fixing additive is complicated in structure compared to the effect, and the movable additive is not widely used because the installation and maintenance costs are very expensive due to the complexity of the movable portion.
- the present invention has been made to solve the above problems, an object of the present invention to provide a door pool and a drilling ship having the same can reduce the resonance and resistance caused by the vertical motion of the seawater inside the door pool during navigation of the drilling ship. It is.
- Another object of the present invention is to provide a door pool that can reduce the amplitude of the sloshing motion and the resistance due to the sloshing motion of the seawater in the moon pool during navigation of the drilling vessel and a drilling vessel having the same.
- a moonpool formed on the drilling vessel, the first space formed through the upper deck from the bottom surface of the drilling vessel to perform the drilling operation;
- the door pool is provided on the side of the first space in the longitudinal direction of the drilling line, the door pool including a second space of the bottom surface is opened to the lower side of the drilling line.
- the maximum length and the maximum width of the cross section of the second space may be formed to be smaller than the maximum length and the maximum width of the cross section of the first space, respectively.
- the top surface of the partition wall may be formed at a height between ⁇ 2M and + 2M based on the draft line of the drilling line.
- a through hole may be formed in the partition wall.
- the said 2nd space is formed in at least any one position of a stern side or a bow side in the longitudinal direction of the said drilling line with respect to the said 1st space.
- the upper surface of the second space may be opened to the upper side of the drilling line.
- a cross section of each of the first space and the second space may have a rectangular shape extending in the drilling line longitudinal direction.
- the transverse width of the second space perpendicular to the longitudinal direction of the drilling line is smaller than the transverse width of the first space.
- the length of the second space extending in the longitudinal direction of the drilling line is smaller than the length of the first space.
- the length of the second space is preferably 10% to 50% of the length of the first space.
- the opening which is opened downward in the first space, is preferably formed to become narrower after maintaining a constant width in the stern side of the drilling vessel.
- Triangular bottom plates positioned on the same plane as the bottom surface of the drilling line may be installed at both side edges of the end portion located in the stern side direction of the drilling line among the openings opened to the lower side of the first space.
- the cross section of the second space may have a semicircle or polygonal shape.
- a drilling vessel provided with the door pool.
- the second space is formed on the side of the first space in the longitudinal direction of the drilling line to increase the total length of the door pool, thereby changing the vertical motion of the inner surface of the door pool and reduce the movement amplitude and drilling line resistance of the inner surface of the door pool You can.
- the amplitude of the sloshing motion of the inner surface of the door pool can be reduced, and the resistance due to the sloshing motion can be reduced.
- the opening opened downward in the first space is formed to become narrower after maintaining a constant transverse width in the direction of the stern side of the drilling vessel, so that the amount of seawater flowing into the first space is relatively reduced and the resistance to the drilling vessel is reduced. This can be reduced.
- FIG. 1 is a plan view of a door pool according to a first embodiment of the present invention
- FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1;
- 3 to 5 are diagrams schematically showing a modification of the second space included in the door pool according to the first embodiment of the present invention.
- FIG. 6 is a plan view of a door pool according to a second embodiment of the present invention.
- FIG. 7 is a VIII-VIII cross-sectional view of FIG. 6,
- FIG. 8 is a VIII-VIII cross-sectional view of FIG. 6,
- FIG. 9 is a plan view of a door pool according to a third embodiment of the present invention.
- FIG. 10 is a VIII-VIII cross-sectional view of FIG. 9,
- FIG. 11 is a view showing a towing test result of a model ship having a moon pool according to embodiments of the present invention.
- drilling vessel 2 upper deck
- first space 20 second space
- FIG. 1 is a plan view of a door pool according to a first embodiment of the present invention
- Figure 2 is a II-II cross-sectional view of FIG.
- the door pool 5 according to the first embodiment of the present invention is formed between the bow and the stern of the drilling line 1, and the first space 10 for performing the drilling operation and the And a second space 20 formed in contact with the first space 10.
- the first space 10 is formed through the upper deck 2 from the bottom surface 3 of the drilling line (1).
- the first space 10 may be formed vertically from the bottom surface 3 of the drilling line 1.
- the first space 10 may be defined by inner walls 51, 52, 53, 54, 55 extending upward and downward in the hull 50 of the drilling line 1.
- the cross section of the first space 10 has a rectangular shape extending in the longitudinal direction of the drilling line, for example, a rectangular shape.
- the cross section of the first space 10 has a symmetrical structure with respect to the center line in the fore and aft direction of the drilling line 1.
- the first space 10 formed as described above may be used as a passage for sending a drilling device (not shown), a drilling pipe (not shown), etc. down to the sea floor.
- the opening 13 opened downward of the first space 10 according to the first embodiment of the present invention has a rectangular shape extending in the longitudinal direction of the drilling line, for example, a rectangular shape.
- the shape of the first space 10 according to the first embodiment of the present invention is merely an example, if the first space 10 can be used as a passage for performing a drilling operation in a variety of shapes and the like Can take the form.
- a second space 20 is formed at the side of the first space 10 in the longitudinal direction of the drilling line.
- the bottom surface of the second space 20 is formed to open to the lower side of the drilling line 1.
- the second space 20 may be defined by inner walls 56, 57, 58 extending in the vertical direction on the hull 50 of the drilling line 1.
- Seawater may flow into and out of the second space 20 through the opening of the second space 20 formed as described above.
- the upper surface of the second space 20 may be opened to the upper side of the drilling line.
- the cross section of the second space 20 has a rectangular shape extending in the longitudinal direction of the drilling line.
- the cross section of the second space 20 has a symmetrical structure with respect to the center line in the fore and aft direction of the drilling line 1.
- the second space 20 is formed in contact with the rear side of the first space 10 (the stern side of the drilling line 1 with respect to the first space 10).
- the second space 20 may be formed in contact with the front side (the bowing direction of the drilling line 1 with respect to the first space 10), the first space (in the longitudinal direction of the drilling line ( It is also possible to be formed on both sides of 10), ie bow side and stern side.
- the door pool 5 according to the first embodiment of the present invention has a length (hereinafter referred to as a conventional door pool) in which only the first space 10 is formed, its length (in FIG. Length of the bow direction in 1) is increased.
- the door pool 5 since the up and down movement of the inner surface of the moon pool generates a greater resistance to the drilling line than the sloshing movement, the door pool 5 according to the first embodiment of the present invention reduces the resistance acting on the drilling line 1 compared to the conventional moon pool. Can be.
- the length L 2 of the second space 20 is formed to be smaller than the length L 1 of the first space 10.
- the length L 2 of the second space 20 is preferably 10% to 50% of the length L 1 of the first space 10.
- the length of the second space 20 is preferably formed to be smaller than the length of the first space 10.
- the width W 2 of the second space 20 is preferably formed to be smaller than the width W 1 of the first space 10. If the width W 2 of the second space 20 is equal to or larger than the width W 1 of the first space 10, an excessive increase in the opening area causes the seawater to flow into the door pool of the drilling vessel. The resistance can be increased rather.
- the second space 20 according to the first embodiment of the present invention is formed in a quadrangular shape whose cross section is smaller in length and width than the cross section of the first space 10.
- 3 to 5 schematically show modifications of the second space included in the door pool according to the first embodiment of the present invention.
- the cross section of the second space 20a may have a semi-circle shape.
- the semi-circular shape may include a semi-elliptic shape.
- the maximum length L 2a and the maximum width W 2a of the cross section of the second space 20a are smaller than the maximum length L 1 and the maximum width W 1 of the cross section of the first space 10.
- the cross section of the second space may have a polygonal shape.
- the cross section of the second space 20b may have a triangular shape as shown in FIG. 4.
- the maximum length L 2b and the maximum width W 2b of the cross section of the second space 20b are smaller than the maximum length L 1 and the maximum width W 1 of the cross section of the first space 10.
- the cross section of the second space 20c may have a trapezoidal shape as shown in FIG. 5.
- the maximum length L 2c and the maximum width W 2c of the cross section of the second space 20c are smaller than the maximum length L 1 and the maximum width W 1 of the cross section of the first space 10.
- FIG. 6 is a plan view of a door pool according to a second embodiment of the present invention
- FIG. 7 is a sectional view taken along line VII-VII of FIG. 6
- FIG. 8 is a sectional view taken along line VII-VII of FIG. 6. 6 to 8
- the door pool 65 according to the second embodiment of the present invention is formed between the bow and the stern of the drilling line 61, the first space 10 for performing the drilling operation, and A second space 20 formed in contact with the first space 10, and a partition 30 formed between the first space 10 and the second space 20.
- the partition 30 is installed between the second space 20 and the first space 10.
- the partition wall 30 is provided to divide the entire length of the door pool 65 into predetermined lengths, respectively.
- a sloshing motion with a large amplitude occurring in a space having a relatively long length (L 1 + L 2 ) has a relatively small length (L 1 and L 2 ) due to the presence of the partition.
- the amplitude occurring in space can be changed by small sloshing motion.
- the partition 30 is formed so that the seawater inside the first space 10 can flow into the second space 20.
- the partition wall 30 is formed such that its top surface is located at a predetermined height from the bottom surface 3 of the drilling line 61.
- the partition wall 30 is formed such that an upper end surface thereof extends to the draft line of the drilling line 61.
- the top surface of the partition wall 30 may be formed to be located between 2 meters from the bottom of the water line 2 meters to the top of the water line of the drilling line 61.
- the shape of the partition wall 30 according to the second embodiment of the present invention is merely an example, and the seawater inside the first space 10 exceeds the upper surface of the partition wall 30 and the second space. As the flow to 20 decreases the resistance generated in the drilling line, various deformations of the partition wall may be possible.
- the partition wall 30 has a through hole so that the seawater of the first space 10 and the second space 20 can flow into and out of the second space 20 and the first space 10, respectively. This can be formed.
- FIG. 9 is a plan view of a door glue according to a third embodiment of the present invention
- FIG. 10 is a sectional view taken along line VIII of FIG. 9.
- a description will be given of the characteristic configuration according to the third embodiment of the present invention.
- the same configurations as those of the first and second embodiments described above will not be described, and if there is no special description for each configuration, the first and second embodiments will be regarded as the same configurations as the first and second embodiments. Replace with an explanation.
- the cross section of the first space 10 according to the third embodiment of the present invention has a rectangular shape extending in the longitudinal direction of the drilling line 71, for example, a rectangular shape. .
- the opening 73 opened to the lower side of the first space 10 is formed to become narrower after maintaining a constant transverse width in the stern side direction of the drilling line 71.
- the drilling line is formed at both edges of the rear end portion of the opening 73 opened downward of the first space 10 (the end portion located in the stern side direction of the drilling line 71).
- a bottom plate 40 located on the same plane as the bottom surface 3 of 71 is provided. In this case, the bottom plate 40 may be formed in a triangular shape.
- the opening 73 opened downward in the first space 10 becomes narrower with respect to the moving direction of the seawater moving from the bow of the drilling line 71 to the stern when the drilling line 71 moves forward.
- the amount of seawater flowing into the first space 10 is relatively reduced, and the resistance applied to the drilling line 71 is reduced.
- the size and shape of the opening 73 opened to the lower side of the first space 10 should be determined as long as it does not interfere with a drilling pipe or the like that descends to the sea bottom through the opening 73.
- the size of the bottom plate 40 should also be determined.
- FIG. 11 is a view showing a towing tank test result of a model ship including a door pool according to embodiments of the present invention.
- 11 shows a model ship (hereinafter referred to as a first model ship) in which a conventional door pool (only a first space is formed), a door pool according to a first embodiment of the present invention (including only the first space and the second space).
- the values displayed on the 'effective horsepower' axis mean relative values based on assuming that the effective horsepower required for towing the first model ship to 13 kts is 100.
- the experimental results will be described with reference to FIG. 11, but when the first model ship (the conventional case) and the second model ship (the first embodiment) are compared, the second model ship is 13kts to the first model ship. It can be seen that the resistance is reduced by about 4%, which means that the second model ship can operate with less engine horsepower than the first model ship at the same speed.
- the second model ship has a reduced resistance generated during operation compared to the first model ship, and can operate with less engine horsepower at a constant speed.
- the third model ship is about 10% of the first model ship at 13 kts. It can be seen that the resistance is reduced, which means that the third model ship can operate with less engine horsepower than the first model ship at the same speed.
- the third model ship has a reduced resistance generated during operation compared to the first model ship, and thus can operate with less engine horsepower at a constant speed.
- the fourth model ship is about 3 compared to the third model ship over the entire speed section. % Resistance is reduced. In other words, it means that the fourth model ship can operate at a relatively low fuel consumption at a constant speed compared to the third model ship.
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Ocean & Marine Engineering (AREA)
- Earth Drilling (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
Description
Claims (15)
- 시추선에 형성된 문풀(moonpool)로서,시추작업을 수행할 수 있도록 상기 시추선의 바닥면으로부터 상갑판을 관통하여 형성된 제 1 공간; 및상기 시추선의 길이방향으로 상기 제 1 공간의 측부에 형성되고, 바닥면이 상기 시추선의 하측으로 개방되는 제 2 공간을 포함하는 문풀.
- 제1항에 있어서,상기 제 2 공간의 횡단면의 최대길이 및 최대폭은 각각 상기 제 1 공간의 횡단면의 최대길이 및 최대폭보다 작도록 형성되는 것을 특징으로 하는 문풀.
- 제2항에 있어서,상기 제 1 공간 및 상기 제 2 공간 사이에 형성되되, 상기 제 1 공간으로 유출입되는 해수가 상기 제 2 공간으로 유동할 수 있도록 상단면이 상기 시추선의 바닥면으로부터 소정의 높이에 형성되는 격벽을 포함하는 것을 특징으로 하는 문풀.
- 제3항에 있어서,상기 격벽의 상단면은 상기 시추선의 흘수선을 기준으로 -2M 내지 +2M 사이의 높이에 형성되는 것을 특징으로 하는 문풀.
- 제4항에 있어서,상기 격벽에는 관통홀이 형성되는 것을 특징으로 하는 문풀.
- 제1항 내지 제5항 중 어느 한 항에 있어서,상기 제 2 공간은, 상기 제 1 공간에 대하여 상기 시추선의 길이 방향으로 선미 측 혹은 선수 측 중 적어도 어느 한 위치에 형성되는 것을 특징으로 하는 문풀.
- 제1항 내지 제5항 중 어느 한 항에 있어서,상기 제 2 공간의 상면은 상기 시추선의 상측으로 개방되는 것을 특징으로 하는 문풀.
- 제1항 내지 제5항 중 어느 한 항에 있어서,상기 제 1 공간 및 상기 제 2 공간 각각의 횡단면은 상기 시추선 길이방향으로 연장된 사각 형상으로 이루어진 것을 특징으로 하는 문풀.
- 제8항에 있어서,상기 시추선의 길이방향에 수직한 상기 제 2 공간의 횡방향 폭은 상기 제 1 공간의 횡방향 폭보다 작도록 형성되는 것을 특징으로 하는 문풀.
- 제8항에 있어서,상기 시추선의 길이방향으로 연장된 상기 제 2 공간의 길이는 상기 제 1 공간의 길이보다 작도록 형성되는 것을 특징으로 하는 문풀.
- 제9항에 있어서,상기 제 2 공간의 길이는 상기 제 1 공간의 길이의 10%~50%인 것을 특징으로 하는 문풀.
- 제8항에 있어서,상기 제 1 공간의 하측으로 개방된 개구부는 상기 시추선의 선미측 방향으로 일정한 횡방향 폭을 유지한 후 점점 좁아지도록 형성되는 것을 특징으로 하는 문풀.
- 제12항에 있어서,상기 제 1 공간의 하측으로 개방된 개구부 중 상기 시추선의 선미측 방향에 위치하는 단부의 양측 모서리에는 상기 시추선의 바닥면과 동일 평면상에 위치하는 삼각형 형상의 바닥판이 설치되는 것을 특징으로 하는 문풀.
- 제1항 내지 제5항 중 어느 한 항에 있어서,상기 제 2 공간의 횡단면은 반원 또는 다각형 형상으로 이루어진 것을 특징으로 하는 문풀.
- 제1항 내지 제5항 중 어느 한 항에 따른 문풀을 구비한 시추선.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980143692.2A CN102196960B (zh) | 2008-10-27 | 2009-10-06 | 月池和具有该月池的钻探船 |
BRPI0919778A BRPI0919778B1 (pt) | 2008-10-27 | 2009-10-06 | poço de trabalho formado em um navio sonda |
JP2011534375A JP5214808B2 (ja) | 2008-10-27 | 2009-10-06 | ムーンプール及びこれを備えた掘削船 |
RU2011115704/11A RU2473450C2 (ru) | 2008-10-27 | 2009-10-06 | Буровая шахта и буровое судно с буровой шахтой |
ES201190027A ES2396515B1 (es) | 2008-10-07 | 2009-10-06 | Abertura de perforación y barco de perforación que tiene la misma |
US13/092,520 US8327783B2 (en) | 2008-10-27 | 2011-04-22 | Moonpool and drillship having the same |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2008-0105224 | 2008-10-07 | ||
KR20080105224 | 2008-10-27 | ||
KR20080125800 | 2008-12-11 | ||
KR10-2008-0125800 | 2008-12-11 | ||
KR10-2009-0091728 | 2009-09-28 | ||
KR1020090091728A KR101159196B1 (ko) | 2008-10-27 | 2009-09-28 | 문풀 및 이를 구비한 시추선 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/092,520 Continuation US8327783B2 (en) | 2008-10-27 | 2011-04-22 | Moonpool and drillship having the same |
Publications (2)
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WO2010050680A2 true WO2010050680A2 (ko) | 2010-05-06 |
WO2010050680A3 WO2010050680A3 (ko) | 2010-07-29 |
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PCT/KR2009/005703 WO2010050680A2 (ko) | 2008-10-07 | 2009-10-06 | 문풀 및 이를 구비한 시추선 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107672756A (zh) * | 2016-08-01 | 2018-02-09 | 中国国际海运集装箱(集团)股份有限公司 | 月池及具有其的海工设备和设置在该月池上的滑移装置 |
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KR20000004704A (ko) * | 1998-06-30 | 2000-01-25 | 이해규 | 2단의 문풀 구조를 구비한 시추선 |
US6397770B1 (en) * | 1999-02-03 | 2002-06-04 | Hitec Systems As. | Ship for offshore operations with vertical openings |
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2009
- 2009-10-06 WO PCT/KR2009/005703 patent/WO2010050680A2/ko active Application Filing
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KR20000004704A (ko) * | 1998-06-30 | 2000-01-25 | 이해규 | 2단의 문풀 구조를 구비한 시추선 |
US6397770B1 (en) * | 1999-02-03 | 2002-06-04 | Hitec Systems As. | Ship for offshore operations with vertical openings |
Non-Patent Citations (2)
Title |
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KIM, DO JEONG ET AL.: 'An Experimental Study on the Moonpool Characteristics of a Cleaning Ship for Ocean Environment Purification' JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY vol. 20, no. 2, 01 April 2006, ISSN 1225-0767 pages 46 - 51 * |
YOO JAEHOON ET AL.: 'Performance of Drillship with Moonpool and Azimuth Thrusters' JOURNAL OF THE SOCIETY OF NAVAL ARCHITECTS OF KOREA vol. 41, no. 6, 01 December 2004, ISSN 1225-1143 pages 33 - 39 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107672756A (zh) * | 2016-08-01 | 2018-02-09 | 中国国际海运集装箱(集团)股份有限公司 | 月池及具有其的海工设备和设置在该月池上的滑移装置 |
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WO2010050680A3 (ko) | 2010-07-29 |
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