KR20090023891A - Drillship with mool-pool - Google Patents

Drillship with mool-pool Download PDF

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Publication number
KR20090023891A
KR20090023891A KR1020070088994A KR20070088994A KR20090023891A KR 20090023891 A KR20090023891 A KR 20090023891A KR 1020070088994 A KR1020070088994 A KR 1020070088994A KR 20070088994 A KR20070088994 A KR 20070088994A KR 20090023891 A KR20090023891 A KR 20090023891A
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South Korea
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seawater
pool
door pool
door
drilling
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KR1020070088994A
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Korean (ko)
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박병태
안영규
이영민
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삼성중공업 주식회사
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Priority to KR1020070088994A priority Critical patent/KR20090023891A/en
Publication of KR20090023891A publication Critical patent/KR20090023891A/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 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
    • B63B1/40—Other means for varying the inherent hydrodynamic characteristics of hulls by diminishing wave resistance
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/12—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)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

An oil prospecting ship employing a moon pool is provided to increase speed of the oil prospecting ship by reducing resistance caused by movement of the oil prospecting ship and suppress a sloshing phenomenon by installing a partition between a moon pool and a seawater inlet. An oil prospecting ship employing a moon pool comprises a seawater inlet(10), a plurality of through-holes(14), and a partition(12). The partition suppresses flow of seawater flowed inside the moon pool. Both sides of the moon pool have the seawater inlet which has a stair shape from a deck to below a sea level. The seawater inlet includes the partition located in an interface of the moon pool.

Description

문풀이 형성된 시추선{Drillship with Mool-pool}Drillship with Mool-pool

본 발명은 문풀이 형성된 시추선에 관한 것으로서, 보다 상세하게는 해수 유입부를 문풀의 선수부면 또는 선수부면 및 좌우 양측면에 형성시켜 문풀 내부에 유입되는 해수의 유동을 감소시킨 문풀이 형성된 시추선에 관한 것이다.The present invention relates to a drilling vessel in which a door pool is formed, and more particularly, to a drilling vessel in which a sea pool inlet is formed on the bow side or bow side and left and right sides of the door pool to reduce the flow of seawater flowing into the door pool.

세계적으로 산업 및 공업이 발전함에 따라 석유, 천연가스 등의 사용량이 증가하게 되고, 이에 따라 경제성이 없어 무시되어 왔던 군소의 한계 유전(marginal field) 이나 심해 유전의 개발이 경제성을 가지게 되었으며, 해저 채굴 기술의 발달과 더불어 이러한 유전을 개발하기 위한 시추설비를 구비한 시추선이 다양한 형태로 개발되어 있다.As industrial and industrial development in the world develops, the use of oil and natural gas increases, and as a result, the development of marginal or deep sea oil fields, which have been neglected due to lack of economy, has become economical. With the development of technology, drilling vessels equipped with drilling facilities for developing such oil fields have been developed in various forms.

종래에는 해상의 일점에 정박한 상태에서 해저 시추 작업을 하는 해저 시추 전용의 리그선(rig ship)이나 고정식 플렛홈이 주로 사용되었으나, 최근에는 첨단의 시추 장비를 탑재하고 자체의 동력으로 항해를 할 수 있도록 일반 선박과 동일한 형태로 제작된 시추선(Floating Production Storage Offloading Vessels)이 개발되어 해저 시추에 사용되고 있다.In the past, rig ships or fixed platform grooves dedicated to subsea drilling, which are used for seabed drilling while anchored at a point of the sea, were mainly used, but recently, advanced cutting equipment is installed and sails on its own power. Floating Production Storage Offloading Vessels have been developed to be used in subsea drilling.

이러한 시추선은 시추 파이프를 해저면으로 내려 보내기 위해서 중심부에 수 직으로 관통된 문풀(moon-pool)이 형성된다.These drilling vessels form a vertically penetrating moon-pool in the center to drive the drilling pipe down to the sea floor.

도 1은 일반적인 문풀의 형상을 도시하는 측면 개략도이다.1 is a schematic side view showing the shape of a general moonpool.

도시된 바와 같이 문풀(2)은 시추선(1)의 중심부를 수직으로 관통하여 형성되고, 상기 문풀(2)의 선미부면에는 시추 작업을 위한 작업대(3)가 형성되며, 대한민국 특허청에 출원된 출원번호 10-1998-0026195 등에서 이러한 구조에 대해 제안한 바 있다.As shown, the door pool 2 is formed to vertically penetrate through the center of the drilling line 1, the work surface 3 for the drilling operation is formed on the stern side of the door pool 2, the application filed in the Republic of Korea Patent Office No. 10-1998-0026195 et al. Proposed such a structure.

그러나, 이러한 문풀은 내부로 유입된 해수와 선체 외부의 해수의 상대적인 유동에 의해 발생되는 슬로싱(sloshing)현상 및 문풀 내부의 해수 유동으로 인하여 선박의 정박 및 항해 안정성 측면에서 매우 불리한 구조이다.However, these moon pools are very disadvantageous in terms of anchoring and navigational stability of the ship due to the sloshing phenomenon caused by the relative flow of seawater introduced into the inside of the hull and the seawater flow inside the moonpool.

특히, 최근에는 시추선이 군소 유전 개발을 위하여 그 위치를 자주 옮겨야 하는 작업 조건에 따라 시추선의 이동 속도를 증가시킬 필요성이 대두되고 있으나, 문풀의 내부의 해수 유동으로 인한 저항으로 선체 속도가 감소되는 문제점이 존재한다.In particular, the need for increasing the speed of drilling ships is increasing according to the working conditions in which the drilling ship has to move its position frequently for the development of small oil fields, but the hull speed decreases due to the resistance due to the seawater flow inside the door pool. This exists.

본 발명은 상기의 문제점들을 해결하기 위해서 안출된 것으로서, 본 발명은 문풀 내부로 유입된 해수의 유동을 억제시킬 수 있는 문풀이 형성된 시추선을 제공하는 데 그 목적이 있다.The present invention has been made to solve the above problems, an object of the present invention is to provide a drilling vessel formed with a door pool that can suppress the flow of seawater introduced into the door pool.

본 발명은 중앙에 수직으로 관통된 문풀이 형성된 시추선에 있어서 상기 문풀의 선수부면에는 상부 갑판으로부터 해수면의 아래까지 계단 형상의 공간으로 이루어지는 해수 유입부가 형성되어, 문풀 내부로 유입된 해수의 유동을 억제시킬 수 있음을 특징으로 한다.The present invention is a drilling line formed in the center of the door pool vertically penetrated in the bow portion of the door pool seawater inlet consisting of a stair-shaped space from the upper deck to the bottom of the sea surface is formed, to suppress the flow of seawater introduced into the door pool It can be characterized by.

또한, 상기 문풀의 좌우 양측면에는 상부 갑판으로부터 해수면의 아래까지 계단 형상의 공간으로 이루어지는 해수 유입부가 각각 형성되어, 문풀 내부로 유입된 해수의 유동을 억제시킬 수 있음을 특징으로 한다.In addition, the left and right sides of the door pool is formed in each of the seawater inlet consisting of a step-shaped space from the upper deck to the bottom of the sea surface, it is characterized in that it can suppress the flow of seawater introduced into the door pool.

마지막으로, 상기 해수 유입부들은 관통공이 다수 개 형성된 격벽이 상기 문풀과의 경계면에 형성됨을 특징으로 한다.Finally, the seawater inlet is characterized in that the partition wall is formed with a plurality of through holes formed on the interface with the door pool.

본 발명은 선수부면 및 좌우 양측면에 형성된 해수 유입부에 문풀 내부로 유입된 해수를 유입시키고 상기 해수 유입부와 문풀의 경계면에 관통공이 형성된 격벽을 설치하여, 문풀 내부의 슬로싱 현상을 억제시킬 수 있으므로 시추선의 이동 시 내부 유동으로 인한 저항을 감소시켜 시추선의 이동 속도를 증가시킬 수 있는 장점이 있다.The present invention introduces the seawater introduced into the door pool to the seawater inlet formed on the bow side and left and right sides and install a partition wall formed with a through hole in the interface between the seawater inlet and the door pool, it is possible to suppress the sloshing phenomenon inside the door pool Therefore, there is an advantage that can increase the movement speed of the drilling line by reducing the resistance due to the internal flow during the movement of the drilling line.

첨부된 도면을 참조로 하여 본 발명 문풀이 형성된 시추선을 보다 상세히 설명하기로 한다.With reference to the accompanying drawings will be described in more detail the drilling vessel formed the door pool of the present invention.

도 2는 본 발명의 바람직한 일실시예에 따른 문풀이 형성된 시추선을 도시하는 단면 개략도이며, 도 3은 도 2의 A-A'부의 단면도이며, 도 4는 본 발명의 바람직한 일실시예에 따른 문풀이 형성된 시추선의 개념사시도이다.2 is a schematic cross-sectional view showing a drilling line formed with a door pull according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the AA 'portion of Figure 2, Figure 4 is a door according to a preferred embodiment of the present invention Conceptual perspective view of a drilling vessel with pools formed.

도 2에 도시된 바와 같이 편의상 시추선의 선수부를 FWD로 표시하고 선미부를 ATF로 표시할 때, 본 발명에 따른 문풀이 형성된 시추선(1)은 문풀(2)의 선수부(FWD)측면에 상부 갑판으로부터 해수면의 아래까지 계단 형상의 공간으로 이루어지는 해수 유입부(10)가 형성된다.As shown in FIG. 2, when the bow portion of the drilling line is indicated by FWD and the stern portion is indicated by ATF, the drilling vessel 1 having the door pool according to the present invention is formed from the upper deck on the side of the bow portion FWD of the moon pool 2. A seawater inlet 10 is formed to have a stepped space below the sea level.

여기서, 상기 해수 유입부(10)는 시추선이 정지 또는 운행 중 해수면에 완전히 잠길 수 있는 위치까지 형성되어 문풀(2) 내부로 유입된 해수가 해수 유입부(10)로 유입될 수 있도록 구성되는 것이 바람직하다.Here, the seawater inlet 10 is formed so that the drilling line can be completely locked to the sea surface during the stop or operation is configured to be introduced into the seawater inlet 10 to the seawater introduced into the door pool (2) desirable.

그리고, 상기 해수 유입부(10)의 상부에는 상부 갑판(1a)이 연장형성되어 상기 해수 유입부(10)의 형성으로 인하여 작업 공간이 협소해 지는 문제점을 해결할 수 있다.And, the upper deck (1a) is formed on the upper portion of the sea water inlet 10 can solve the problem that the working space is narrowed due to the formation of the sea water inlet (10).

또한, 도 3에 도시된 바와 같이 상기 해수 유입부는 관통공(14)이 다수 개 형성된 격벽(12)이 문풀과의 경계면에 형성되고, 상기 관통공(14)은 시추선마다 차이가 있으나, 대체적으로 0.5~2m의 지름을 가지고, 0.2~1.0m 간격으로 형성되는 것 이 바람직하다.In addition, as shown in Figure 3, the seawater inlet is formed on the interface with the door pool partition 12 having a plurality of through-holes 14, the through-hole 14 is different for each drilling line, but generally It is preferable to have a diameter of 0.5 to 2 m, and to be formed at 0.2 to 1.0 m intervals.

도 4에 도시된 개념사시도를 참고하면, 앞서 살펴본 해수 유입부(10)와 격벽(12) 및 관통공(14)의 형상을 보다 명확하게 이해할 수 있다.Referring to the conceptual perspective view illustrated in FIG. 4, the shapes of the seawater inlet 10, the partition 12, and the through hole 14 described above may be more clearly understood.

다음으로 해수 유입부가 형성된 경우와 종래의 문풀의 내부 유동의 차이에 대해 살펴보기로 한다.Next, the difference between the internal flow of the conventional pool and the case where the seawater inlet is formed will be described.

도 5는 본 발명의 바람직한 일실시예에 따른 해수 유입부가 형성된 문풀과 종래의 문풀 내의 해수 유동을 도시하는 개념도이며, 도 5의 (a)는 종래의 문풀 내의 해수 유동을 도시하고 있으며, 도 5의 (b)는 본 발명의 바람직한 일실시예에 따른 해수유입부가 형성된 문풀 내의 해수 유동을 도시하고 있다.FIG. 5 is a conceptual diagram illustrating seawater flow in a door pool with a seawater inlet formed in accordance with a preferred embodiment of the present invention and a conventional moonpool, and FIG. 5A illustrates seawater flow in a conventional moonpool, and FIG. (B) shows the seawater flow in the moon pool formed of seawater inlet according to a preferred embodiment of the present invention.

본 발명에 따른 문풀이 형성된 시추선은 도 5의 (b)에 도시된 바와 같이 문풀 내부의 해수 유동 거리가 도 5의 (a)에 도시된 문풀 내부의 해수 유동 거리(a)에 비해 해수 유입부의 폭(b) 만큼 증가하게 되어 문풀 내부로 유입된 해수의 수평 유동 거리를 증가시켜 해수의 슬로싱 현상을 방지할 수 있다.As shown in (b) of FIG. 5, the drilling line formed with the door pool according to the present invention has a seawater flow distance within the door pool compared to the seawater flow distance (a) inside the door pool shown in FIG. By increasing the width (b) it is possible to increase the horizontal flow distance of the seawater introduced into the door pool to prevent the sloshing phenomenon of the seawater.

특히, 격벽(12)에 형성된 관통공(14)을 통해 해수(4)가 유입배출되면서 유동을 더욱 안정화시킬 수 있다.In particular, as the seawater 4 is introduced and discharged through the through hole 14 formed in the partition 12, the flow may be further stabilized.

또한, 해수 유입부가 형성되지 않는 문풀과 비교하여 문풀 내부로 유입된 해수량이 증가되므로 문풀 내부로 올라오는 그린 워터(Green Water)의 량을 감소시킬 수 있다.In addition, since the amount of seawater introduced into the door pool is increased compared to the door pool in which the seawater inlet is not formed, the amount of green water coming into the door pool may be reduced.

도 6은 본 발명의 바람직한 또 다른 일실시에에 따른 문풀이 형성된 시추선의 개념사시도이다.6 is a conceptual perspective view of a drilling vessel formed with a door pool according to another preferred embodiment of the present invention.

본 실시예에서는 문풀의 좌우 양측면에 상부 갑판으로부터 해수면의 아래까지 계단 형상의 공간으로 이루어지는 해수 유입부(10a,10b)가 각각 형성된 것으로 해수의 좌우 유동 거리를 증가시켜 더욱더 안정된 해수 유동을 유도할 수 있다.In the present embodiment, the seawater inlets 10a and 10b each having a stair-shaped space from the upper deck to the bottom of the sea surface are formed on the left and right sides of the moon pool, respectively, so that the left and right flow distances of the seawater can be increased to induce a more stable seawater flow. have.

또한, 상기 좌우 양측면에 형성되는 해수 유입부(10a,10b)에도 앞서 살펴본 선수부면에 형성되는 해수 유입부와 동일하게 관통공이 다수 개 형성된 격벽이 문풀과의 경계면에 형성되는 것이 바람직하다.In addition, the seawater inlets 10a and 10b formed on both left and right sides thereof are preferably formed at the boundary surface with the door pool in the same manner as the seawater inlet formed on the bow portion as described above.

이상과 같이 본 발명은 해수 유입부를 통해 해수 유동을 감소시킨 문풀이 형성된 시추선을 제공하는 것을 기본적인 기술적인 사상으로 하고 있음을 알 수 있으며, 이와 같은 본 발명의 기본적인 사상의 범주내에서, 당업계의 통상의 지식을 가진 자에게 있어서는 다른 많은 변형이 가능함은 물론이다.As described above, it can be seen that the present invention has a basic technical idea to provide a drilling vessel in which a moon grass is formed through which seawater flow is reduced through the seawater inlet, and within the scope of the basic idea of the present invention, Of course, many other variations are possible for a person of ordinary skill.

도 1은 일반적인 문풀의 형상을 도시하는 측면 개략도.1 is a side schematic view showing the shape of a general door glue.

도 2는 본 발명의 바람직한 일실시예에 따른 문풀이 형성된 시추선을 도시하는 단면 개략도..Figure 2 is a schematic cross-sectional view showing a drilling vessel formed with a door pool according to an embodiment of the present invention.

도 3은 도 2의 A-A'부의 단면도.3 is a cross-sectional view taken along the line AA ′ of FIG. 2;

도 4는 본 발명의 바람직한 일실시예에 따른 문풀이 형성된 시추선의 개념사시도.4 is a conceptual perspective view of a drilling vessel formed with a door pool according to an embodiment of the present invention.

도 5는 본 발명의 바람직한 일실시예에 따른 해수 유입부가 형성된 문풀과 종래의 문풀 내의 해수 유동을 도시하는 개념도.5 is a conceptual diagram illustrating seawater flow in a door pool and a conventional door pool formed with a sea water inlet according to an embodiment of the present invention.

도 6은 본 발명의 바람직한 또 다른 일실시에에 따른 문풀이 형성된 시추선의 개념사시도.6 is a conceptual perspective view of a drilling vessel formed with a door pool according to another preferred embodiment of the present invention.

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

1: 시추선 1a: 상부 갑판1: drilling rig 1a: upper deck

2: 문풀 3: 작업대2: door glue 3: worktable

4: 해수 10: 해수 유입부4: seawater 10: seawater inlet

12: 격벽 14: 관통공12: bulkhead 14: through hole

Claims (2)

중앙에 수직으로 관통된 문풀이 형성된 시추선에 있어서,In the drilling vessel formed with the vertically penetrated door grass, 상기 문풀의 선수부면에는,On the bow side of the moon pool, 상부 갑판으로부터 해수면의 아래까지 계단 형상의 공간으로 이루어지는 해수 유입부(10)가 형성되며, 상기 해수 유입부(10)에는 관통공(14)이 다수개 형성된 격벽(12)이 상기 문풀과의 경계면에 형성되어 문풀 내부로 유입된 해수의 유동을 억제시킬 수 있음을 특징으로 하는 문풀이 형성된 시추선.A seawater inlet 10 is formed from the upper deck to the bottom of the sea surface and has a stair-shaped space. The seawater inlet 10 has a partition 12 formed with a plurality of through-holes 14 at the interface with the door pool. Drilling vessels formed with a door pool, characterized in that formed to be able to suppress the flow of seawater introduced into the door pool. 제 1 항에 있어서,The method of claim 1, 상기 문풀의 좌우 양측면에는,On both left and right sides of the door glue, 상부 갑판으로부터 해수면의 아래까지 계단 형상의 공간으로 이루어지는 해수 유입부(10a,10b)가 각각 형성되며, 상기 해수 유입부(10a,10b)에는 관통공(14)이 다수 개 형성된 격벽(12)이 상기 문풀과의 경계면에 형성됨을 특징으로 하는 문풀이 형성된 시추선.Seawater inlets (10a, 10b) formed of a step-shaped space from the upper deck to the bottom of the sea surface are formed, respectively, the partition 12 having a plurality of through-holes 14 are formed in the seawater inlets (10a, 10b) Drilling line formed with a door pool, characterized in that formed on the interface with the door pool.
KR1020070088994A 2007-09-03 2007-09-03 Drillship with mool-pool KR20090023891A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101138400B1 (en) * 2009-09-16 2012-04-26 대우조선해양 주식회사 Apparatus for controlling resistance of a moon pool
KR101159196B1 (en) * 2008-10-27 2012-06-25 삼성중공업 주식회사 Moonpool and drillship having the same
WO2014014149A1 (en) * 2012-07-20 2014-01-23 현대중공업 주식회사 Drillship having block for preventing vortex with concave type flow stabilizer part in moonpool
KR101444504B1 (en) * 2011-03-14 2014-11-04 현대중공업 주식회사 Drillship having block in moonpool for preventing vortex with concave type flow stabilizer part
KR101487513B1 (en) * 2013-11-29 2015-01-28 삼성중공업 주식회사 Wave absorbing apparatus of moonpool
KR101491670B1 (en) * 2013-07-19 2015-02-09 삼성중공업 주식회사 Floating Offshore Structure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101159196B1 (en) * 2008-10-27 2012-06-25 삼성중공업 주식회사 Moonpool and drillship having the same
KR101138400B1 (en) * 2009-09-16 2012-04-26 대우조선해양 주식회사 Apparatus for controlling resistance of a moon pool
KR101444504B1 (en) * 2011-03-14 2014-11-04 현대중공업 주식회사 Drillship having block in moonpool for preventing vortex with concave type flow stabilizer part
WO2014014149A1 (en) * 2012-07-20 2014-01-23 현대중공업 주식회사 Drillship having block for preventing vortex with concave type flow stabilizer part in moonpool
CN103748006A (en) * 2012-07-20 2014-04-23 现代重工业株式会社 Drillship having block for preventing vortex with concave type flow stabilizer part in moonpool
US9027492B2 (en) 2012-07-20 2015-05-12 Hyundai Heavy Industries Co., Ltd. Drillship having vortex suppresion block with recessed flow stabilizing section in moon pool
CN103748006B (en) * 2012-07-20 2016-06-22 现代重工业株式会社 There is the drill ship of the block for suppressing eddy current being formed with matrix flowing stabilizers in moonpool
KR101491670B1 (en) * 2013-07-19 2015-02-09 삼성중공업 주식회사 Floating Offshore Structure
KR101487513B1 (en) * 2013-11-29 2015-01-28 삼성중공업 주식회사 Wave absorbing apparatus of moonpool

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