KR20120118522A - Drillship's moon pool - Google Patents

Drillship's moon pool Download PDF

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Publication number
KR20120118522A
KR20120118522A KR1020110035931A KR20110035931A KR20120118522A KR 20120118522 A KR20120118522 A KR 20120118522A KR 1020110035931 A KR1020110035931 A KR 1020110035931A KR 20110035931 A KR20110035931 A KR 20110035931A KR 20120118522 A KR20120118522 A KR 20120118522A
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South Korea
Prior art keywords
door pool
cross
pool
drilling
moon pool
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KR1020110035931A
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Korean (ko)
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민준기
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현대중공업 주식회사
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Priority to KR1020110035931A priority Critical patent/KR20120118522A/en
Publication of KR20120118522A publication Critical patent/KR20120118522A/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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mining & Mineral Resources (AREA)
  • Ocean & Marine Engineering (AREA)
  • Civil Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

PURPOSE: A moon pool of an oil prospecting ship is provided to form the lower part of a moon pool arranged below the draft line narrower than the upper part of the moon pool, thereby increasing the dead weight of the oil prospecting ship by widening a volume of a hull arranged below the draft line. CONSTITUTION: A lower part cross section area of a moon pool of an oil prospecting ship(100) is smaller than an upper part cross section area. The lower part cross section area is larger than a cross section area of a blow-out preventer penetrating the moon pool. The upper part of the moon pool is a straight part(121) straightly formed toward a vertical down direction.

Description

시추선의 문풀{Drillship's Moon Pool}Drillship's Moon Pool}

본 발명은 시추선의 문풀에 관한 것으로서, 특히 시추선의 재화중량 증가 및 선속을 증가시킬 수 있게 구성한 것이다.The present invention relates to a door pool of a drilling vessel, and in particular, is configured to increase the cargo weight and ship speed of the drilling vessel.

시추선의 선체 중앙에는 시추 파이프를 해저 바닥으로 내려 보내기 위한 대규모의 개구(Moon Pool: 문풀)가 형성되어 있다. 문풀은 시추선의 용도 측면에서는 필수 불가결한 구조이지만 선박의 정박, 항해 안정성이나 항해 성능의 측면에서는 매우 불리한 구조이다.In the center of the ship's hull is a large open pool (Moon Pool) for sending drilling pipes to the bottom of the seabed. Moonpool is an indispensable structure for the purpose of drilling ships, but it is very disadvantageous in terms of ship anchoring, navigational stability and navigational performance.

특히, 종래의 시추선에는 문풀 내에 유입되어 있는 해수와 선체 외부의 해수의 상대적인 유동에 의해 발생되는 슬로싱(sloshing) 현상으로 인하여 시추선의 항해 시에 저항 증가, 속도저하, 소요 마력 증가, 연료소모증가, 및 선체의 손상 등을 야기할 수 있다.In particular, conventional drilling ships have increased resistance, slow speed, increased horsepower, and increased fuel consumption when they are navigating due to the sloshing phenomenon caused by the relative flow of seawater flowing into the door pool and seawater outside the hull. , And the hull may be damaged.

도면에서, 도 1은 종래 기술에 따른 문풀을 나타낸 시추선의 종단면도이고, 도 2는 도 1에 도시된 시추선의 문풀을 나타낸 횡단면도이다.In the drawings, FIG. 1 is a longitudinal sectional view of a drilling line showing a door pool according to the prior art, and FIG. 2 is a cross-sectional view showing a door pool of a drilling line shown in FIG.

도 1 및 도 2에 도시된 바와 같이, 종래의 시추선(1)에는 상갑판에서 선저면까지 수직으로 관통하는 문풀(3)이 형성된다. 앞에서 설명한 바와 같이 문풀(3)을 통해 시추파이프가 해저로 진입해 들어가며, 문풀(3)의 측부에는 트롤리가 위치하여 시추선의 종방향으로 이동한다.As shown in Fig. 1 and Fig. 2, the conventional drilling vessel (1) is formed with a door pool (3) vertically penetrating from the upper deck to the bottom surface. As described above, the drilling pipe enters the seabed through the door pool 3, and a trolley is positioned at the side of the door pool 3 to move in the longitudinal direction of the drilling line.

한편, 문풀(3)은 상갑판에서 선저면까지 곧게 형성된 사각 풀의 형태로 구성된다. 이와 같이 문풀(3)의 상단부 면적과 하단부 면적이 동일하게 형성됨에 따라 흘수선 아래에 위치한 선체의 체적이 작아진다. 이와 같이 문풀(3)이 형성됨에 따라 흘수선 아래에 위치하는 선체의 체적이 작아지게 되고, 선체의 체적이 작아짐에 따라 시추선(1)의 재화중량이 작아지는 단점이 있다.On the other hand, the door grass 3 is configured in the form of a square grass straight from the upper deck to the bottom surface. As the upper and lower area areas of the door pool 3 are formed in the same manner, the volume of the hull positioned below the waterline is reduced. As the door pool 3 is formed as described above, the volume of the hull positioned below the waterline becomes small, and as the volume of the hull becomes smaller, the weight of the goods of the drilling line 1 becomes smaller.

또한 선저면에 문풀(3)이 형성됨에 따라 저항이 커지면서 선속이 크게 줄게 되는 단점이 있다.
In addition, as the door pool 3 is formed on the bottom of the ship, the resistance is increased and the ship speed is greatly reduced.

본 발명은 앞에서 설명한 바와 같은 종래 기술의 문제점을 해결하기 위하여 발명된 것으로서, 재화중량의 감소량을 줄일 수 있고 또한 시추선의 선속 감소를 줄일 수 있게 구성한 시추선의 문풀을 제공하는 데 그 목적이 있다.The present invention has been invented to solve the problems of the prior art as described above, an object of the present invention is to provide a door pool of the drilling vessel configured to reduce the amount of reduction in the weight of goods and to reduce the decrease in the speed of the drilling vessel.

상기와 같은 목적을 달성하기 위한 본 발명의 시추선 문풀은 시추선 선저면에 형성된 문풀의 하단 단면적은 문풀의 상단부 단면적보다 작은 것을 기술적 특징으로 한다.Drilling line door pool of the present invention for achieving the above object is characterized in that the lower cross-sectional area of the door pool formed on the drilling vessel bottom surface is smaller than the cross-sectional area of the upper end of the door pool.

또한, 본 발명의 바람직한 실시예에 따르면, 문풀의 하단 단면적은 문풀을 통과하는 폭발방지기의 단면적보다 크다.In addition, according to a preferred embodiment of the present invention, the lower cross-sectional area of the door pool is larger than the cross-sectional area of the explosion prevention device passing through the door pool.

또한, 본 발명의 바람직한 실시예에 따르면, 상기 문풀의 상단부는 수직 하향으로 곧게 형성된 직선부이고, 상기 직선부의 아래는 하부로 갈수록 점차 좁아지는 형태의 경사면이 형성된 경사부로 구분된다.In addition, according to a preferred embodiment of the present invention, the upper end of the door pool is a straight portion formed straight down vertically, the lower portion of the straight portion is divided into an inclined portion formed with an inclined surface gradually narrowed downward.

또한, 본 발명의 바람직한 실시예에 따르면, 상기 문풀은 상단부에서 선저면까지 하부로 갈수록 점차 좁아지는 형태의 경사면으로 형성된다.In addition, according to a preferred embodiment of the present invention, the door pool is formed as an inclined surface gradually narrowed downward from the upper end to the bottom surface.

또한, 본 발명의 바람직한 실시예에 따르면, 상기 경사부는 흘수선 아래에 위치한다.
Further, according to a preferred embodiment of the present invention, the inclined portion is located below the draft line.

앞서 설명한 바와 같이, 본 발명에 따른 시추선의 문풀은 흘수선 아래에 위치한 문풀의 하단부가 상부에 비해 좁게 형성됨에 따라 흘수선 아래에 위치한 선체의 체적을 넓힘으로써, 상단에서 하단까지 곧게 형성된 문풀에 비해 시추선의 재화중량을 증가시킬 수 있다는 장점이 있다.As described above, the door pool of the drilling line according to the present invention widens the volume of the hull located below the waterline as the bottom portion of the door pool located below the waterline is narrower than the upper portion, so that the drilling line of the drilling line compared to the door pool formed straight from the top to the bottom The advantage is that the weight of the goods can be increased.

또한, 본 발명에 따른 시추선의 문풀은 문풀의 선저면에 형성된 문풀의 면적이 작게 형성됨에 따라 저항을 줄일 수 있어 선속을 증가시킬 수 있다는 장점이 있다.
In addition, the door pool of the drilling vessel according to the present invention has the advantage that the resistance can be reduced as the area of the door pool formed on the bottom surface of the door pool can be reduced to increase the speed of the ship.

도 1은 종래 기술에 따른 문풀을 나타낸 시추선의 종단면도이고,
도 2는 도 1에 도시된 시추선의 문풀을 나타낸 횡단면도이다.
도 3은 본 발명에 따른 문풀을 나타낸 시추선의 종단면도이고,
도 4는 도 3에 도시된 문풀의 횡단면도이다.1 is a longitudinal cross-sectional view of a drilling line showing a moon pool according to the prior art,
FIG. 2 is a transverse cross-sectional view showing the door pool of the drilling line shown in FIG. 1.
3 is a longitudinal cross-sectional view of a drilling line showing a moon pool according to the present invention,
FIG. 4 is a cross-sectional view of the moonpool shown in FIG. 3.

아래에서는 본 발명에 따른 시추선의 문풀의 양호한 실시예를 첨부한 도면을 참조로 하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the door pool of the drilling vessel according to the present invention will be described in detail.

도면에서, 도 3은 본 발명에 따른 문풀을 나타낸 시추선의 종단면도이고, 도 4는 도 3에 도시된 문풀의 횡단면도이다.In the drawings, FIG. 3 is a longitudinal cross-sectional view of a drilling line showing a door pool according to the present invention, and FIG. 4 is a cross-sectional view of the door pool shown in FIG.

도 3 및 도 4에 도시된 바와 같이, 시추선(100)에 형성된 문풀(110)의 하단부는 경사부(123)로서, 경사부(123)의 내측면은 아래로 갈수록 안쪽으로 좁혀지는 경사면(125)이 형성된다.As shown in FIGS. 3 and 4, the lower end of the door pool 110 formed in the drilling line 100 is an inclined portion 123, and the inclined surface 125 of which the inner side of the inclined portion 123 is narrowed inwards downwards. ) Is formed.

아래에서는 이와 같이 구성된 문풀의 구성에 대해 구체적으로 설명한다.Hereinafter, the configuration of the door pool configured as described above will be described in detail.

시추선(100)에 형성된 문풀(110)에 있어서, 문풀(110)의 상부는 곧게 수직으로 뚫린 형태의 수직 직선부(121)이고, 수직 직선부(121)의 아래에 연장된 경사부(123)는 점차 문풀(110)의 면적이 작아지는 형태로 문풀(110)의 4측 경사면(125)이 형성된다. 따라서 문풀(110)의 하단 단면적은 문풀(110)의 상단 단면적보다 작다.In the door pool 110 formed in the drilling line 100, the upper portion of the door pool 110 is a vertical straight portion 121 of a straight vertically bored form, the inclined portion 123 extending below the vertical straight portion 121 4 is an inclined surface 125 of the door pool 110 is formed in such a way that the area of the door pool 110 gradually decreases. Therefore, the lower cross-sectional area of the door pool 110 is smaller than the upper cross-sectional area of the door pool 110.

한편 문풀(110)을 통해 시추파이프가 하향 이동하며 또한 폭발방지기(BOP; Blow-Out Preventer)가 문풀(110)을 통해 해저로 진입하게 되는데, 문풀(110)의 하단 단면적은 최소 폭발방지기가 간섭되지 않고 통과할 수 있을 정도의 크기이다.Meanwhile, the drilling pipe moves downward through the door pool 110, and a blow-out preventer (BOP) enters the sea floor through the door pool 110, and the lower cross-sectional area of the door pool 110 is interfered with by the minimum explosion protector. It is large enough to pass through.

이와 같이 문풀(110)의 하단 단면적이 종래와 같이 곧게 형성된 문풀(110)의 하단 단면적보다 작게 구성됨에 따라 저항이 작아 시추선(100)의 선속을 증가시킬 수 있으며, 또한 흘수선 아래의 선체 체적이 커짐에 따라 재화중량을 증가시키는 효과가 있다.As the lower cross-sectional area of the door pool 110 is configured to be smaller than the lower cross-sectional area of the door pool 110 formed as in the related art, the resistance is small and the ship speed of the drilling line 100 can be increased, and the hull volume under the draft line is increased. This has the effect of increasing the weight of the goods.

앞에서 설명한 문풀(110)은 바람직한 예로서, 문풀(110)의 상부는 수직 하향으로 곧게 형성된 직선부(121)이고 직선부(121)의 아래에서부터 경사면(125)이 형성되며 경사면(125)은 흘수선 아래에 위치하는 것으로 설명하고 있으나, 이와 같이 형성된 문풀(110)의 구조를 변경하여 경사면(125)이 흘수선의 위에서 선저면으로 연장되어 형성되거나 문풀(110)의 상단에서 하단까지 4측면 모두 경사면(125)으로 형성되게 구성할 수 있다. 이와 같이 문풀(110)의 구조가 변경되더라도 문풀(110)의 하단 단면적은 폭발방지기의 단면적 보다 커야 한다.The moon pool 110 described above is a preferred example, the upper portion of the door pool 110 is a straight portion 121 is formed straight down vertically and the inclined surface 125 is formed from below the straight portion 121, the inclined surface 125 is a draft line Although described as being located below, by changing the structure of the door pool 110 formed in this way, the inclined surface 125 is formed to extend from the waterline to the bottom surface or all four sides from the top to the bottom of the door pool 110 inclined surface ( 125). Thus, even if the structure of the door pool 110 is changed, the lower cross-sectional area of the door pool 110 should be larger than the cross-sectional area of the explosion protector.

한편 도면에 미설명된 도면부호 127은 폭발방지기 트롤리(BOP Trolley)가 이동하도록 문풀(110)의 상단에 형성한 레일부이다.Meanwhile, reference numeral 127, which is not described in the drawing, is a rail part formed on the top of the door pool 110 so that the explosion-proof trolley BOP Trolley moves.

100 : 시추선
110 : 문풀
121 : 직선부
123 : 경사부
125 : 경사면
127 : 레일부100: drilling ship
110: Moonpool
121: straight part
123: inclined portion
125: slope
127: rail section

Claims (5)

시추선의 문풀에 있어서,
시추선 선저면에 형성된 문풀의 하단 단면적은 문풀의 상단부 단면적보다 작은 것을 특징으로 하는 시추선의 문풀.
In the door pool of the drilling ship,
The lower end cross-sectional area of the door pool formed on the bottom of the drilling ship is smaller than the cross-sectional area of the upper end of the door pool.
제1항에 있어서,
문풀의 하단 단면적은 문풀을 통과하는 폭발방지기의 단면적보다 큰 것을 특징으로 하는 시추선의 문풀.
The method of claim 1,
The bottom cross-sectional area of the door pool is larger than the cross section of the explosion-proof preventer passing through the door pool.
제1항 또는 제2항에 있어서,
상기 문풀의 상단부는 수직 하향으로 곧게 형성된 직선부이고, 상기 직선부의 아래는 하부로 갈수록 점차 좁아지는 형태의 경사면이 형성된 경사부로 구분되는 것을 특징으로 하는 시추선의 문풀.
The method according to claim 1 or 2,
The upper end of the door pool is a straight portion formed vertically straight down, the lower portion of the straight line of the drilling vessel, characterized in that divided into the inclined portion formed inclined surface gradually narrowed toward the bottom.
제1항 또는 제2항에 있어서,
상기 문풀은 상단부에서 선저면까지 하부로 갈수록 점차 좁아지는 형태의 경사면으로 형성된 것을 특징으로 하는 시추선의 문풀.
The method according to claim 1 or 2,
The door pool of the drilling vessel, characterized in that formed in the inclined surface gradually narrowed toward the lower portion from the upper end to the bottom surface.
제3항에 있어서,
상기 경사부는 흘수선 아래에 위치하는 것을 특징으로 하는 시추선의 문풀.The method of claim 3,
The slope of the drilling vessel, characterized in that the inclined portion is located below the draft line.
KR1020110035931A 2011-04-19 2011-04-19 Drillship's moon pool KR20120118522A (en)

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