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KR101149511B1 - Resistance reducing apparatus for moonpool of a ship - Google Patents

Resistance reducing apparatus for moonpool of a ship Download PDF

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Publication number
KR101149511B1
KR101149511B1 KR1020090086137A KR20090086137A KR101149511B1 KR 101149511 B1 KR101149511 B1 KR 101149511B1 KR 1020090086137 A KR1020090086137 A KR 1020090086137A KR 20090086137 A KR20090086137 A KR 20090086137A KR 101149511 B1 KR101149511 B1 KR 101149511B1
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South Korea
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door pool
ship
resistance
resistance reduction
pool
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KR20110028170A (en
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김홍수
안영규
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삼성중공업 주식회사
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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 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

본 발명은 선박의 문풀 저항을 감소시키는 장치로서, 선박의 선저에서 문풀의 전방에 돌출되도록 마련되며, 문풀로 이동하는 유체의 흐름을 교란시킴으로써 문풀에 의한 저항을 감소시키는 저항감소부를 포함한다. 따라서, 본 발명은 선저에서 문풀의 전방에 저항감소부가 돌출되도록 마련됨으로써 선박의 항해 시 유체의 흐름이 1차적으로 교란되도록 하고, 교란된 유체의 흐름이 문풀로 유입되면서 일부는 슬로싱 모션(sloshing motion)을 일으키도록 하고, 다른 일부는 슬로싱 모션을 억제하도록 함으로써 문풀에 의한 저항을 감소시키며, 문풀로 인한 선박의 속도 저하, 연료소모량 증가 등을 최소화하도록 하고, 문풀로 인해 소요되는 비용 및 노력을 최소화하도록 하는 효과를 가진다.The present invention is a device for reducing the door pool resistance of the ship, is provided to protrude in front of the door pool from the bottom of the ship, and includes a resistance reduction portion for reducing the resistance by the door pool by disturbing the flow of fluid to the door pool. Therefore, the present invention is provided so that the resistance reduction portion protrudes in front of the door pool at the bottom of the ship so that the flow of fluid is primarily disturbed during sailing of the ship, while the flow of the disturbed fluid flows into the door pool, some of the sloshing motion (sloshing) motion, and other parts to suppress sloshing motion, thereby reducing the resistance of the door pool, minimizing the slowing of the ship due to the door pool, increasing fuel consumption, and the cost and effort required by the door pool. Has the effect of minimizing.

문풀, 드릴쉽, 흐름의 교란, 저항감소부 Door pool, drillship, flow disturbance, resistance reduction part

Description

선박의 문풀 저항 감소장치{RESISTANCE REDUCING APPARATUS FOR MOONPOOL OF A SHIP}Moonpool resistance reduction device for ships {RESISTANCE REDUCING APPARATUS FOR MOONPOOL OF A SHIP}

본 발명은 선박의 문풀 저항 감소장치로서, 문풀에 의한 저항을 감소시키며, 문풀로 인한 선박의 속도 저하, 연료소모량 증가 등을 최소화하도록 하는 선박의 문풀 저항 감소장치에 관한 것이다.The present invention relates to a device for reducing the door pool resistance of the ship, and to reduce the resistance by the door pool, and to reduce the door pool resistance of the ship to minimize the speed of the ship due to the door pool, increase in fuel consumption.

산업이 급격하게 발전함에 따라 석유사용량은 해마다 증가하고 있으며, 이에 따라 원유의 안정적인 생산과 공급이 더욱 중요해짐으로써 최근에는 기술적으로 시추가 어려울 뿐만 아니라 경제성이 없어서 무시되었던 군소의 한계유전이나 심해유전의 개발이 경제성을 가지게 되었으며, 해저자원의 개발기술이 발달함에 따라 이러한 유전의 개발에 적합한 시추설비를 구비한 선박인 시추선이 개발되고 있다.As the industry develops rapidly, petroleum consumption is increasing year by year. As a result, the stable production and supply of crude oil becomes more important, which makes it difficult to drill technically and economically. Development has become economic, and as the development technology of subsea resources is developed, drilling ships, which are ships with drilling facilities suitable for the development of such oil fields, are being developed.

일반적으로, 시추선은 해양에서 원유나 가스 등을 발굴하는 장비로서, 해상 플랫폼의 설치가 불가능한 심해 지역이나 파도가 심한 해상에서 원유나 가스 등의 채취 작업이 가능하도록 하고, 구조에 따라 반잠수식 시추장비(semisubmersible drilling rig)와 드릴쉽(drill ship)이 있으며, 해상에서의 작업을 수행하기 위하여 고도의 제작 기술이 요구된다.In general, drilling ships are equipment for digging crude oil or gas in the ocean, and can be used to collect crude oil or gas in deep sea areas where the offshore platform cannot be installed or in seas where the waves are severe, and semi-submersible drilling according to the structure. There are semisubmersible drilling rigs and drill ships, and advanced fabrication techniques are required to carry out work at sea.

시추선은 시추를 위한 파이프를 해저바닥으로 내려 보내기 위하여 중앙에 개구로 이루어진 문풀(moonpool)이 형성되어 있다. The drilling vessel is formed with a moonpool with an opening in the center for sending the pipe for drilling down to the sea floor.

이러한 문풀은 시추선의 용도측면에서 필수 불가결한 구조이지만, 선박의 정박 시 작업 안정성이나 항해 안전성 등의 측면에서 매우 불리한 구조이다. 즉, 문풀 내부로 유입되고 유출되는 해수의 유동과 선체 외부와의 상대적인 운동으로 야기되는 수면의 주기적 진동현상과 이에 따른 선체운동으로 인하여 시추선이 항해 시 저항이 증가하게 되고, 이로 인해 속도의 감소 및 연료소모량의 증가를 가져오며, 이러한 저항증가는 문풀이 없는 경우에 비하여 크게는 50%까지 차이를 보이고 있다. Such door pools are indispensable in terms of the use of drilling ships, but are very disadvantageous in terms of work stability and navigational safety when the vessel is anchored. That is, due to the periodic oscillation of the surface caused by the flow of seawater flowing into and out of the moon pool and the relative movement of the hull outside and the corresponding hull movement, the resistance of the drilling ship increases when sailing. This leads to an increase in fuel consumption, and this increase in resistance is up to 50% compared to the case without the door glue.

또한, 시추선이 시추작업을 위하여 정박하고 있는 동안에도 파도에 의한 선체운동과의 문풀 내부유동의 공진현상으로 문풀 내부의 해수가 데크 위로 넘쳐 올라오는 현상이 발생하여 시추작업의 안전성을 해치게 된다. 따라서, 문풀에 덮개가 설치된 시추선이 사용되고 있다.In addition, while the ship is anchored for drilling, seawater inside the pool is overflowing onto the deck due to resonant phenomena of the flow of the door pool with the hull motion caused by the waves, thereby impairing the safety of the drilling operation. Therefore, a drilling ship provided with a cover in the door pool is used.

종래의 문풀을 가진 시추선을 첨부된 도면을 참조하여 설명하면 다음과 같다.A drilling vessel having a conventional door pool is described with reference to the accompanying drawings as follows.

도 1은 종래의 기술에 따른 시추선을 도시한 정면도이다. 도시된 바와 같이, 종래의 기술에 따른 시추선(1)은 문풀(2)의 선저 양측에 각각 힌지결합부(3a)에 의해 결합되는 덮개(3)가 유압실린더(4)에 의해 문풀(2)의 내측면(2a)에 연결된다.1 is a front view showing a drilling line according to the prior art. As shown, the drilling line 1 according to the prior art has a door pool (2) by the hydraulic cylinder (4) has a cover (3) coupled to each side of the bottom of the door pool (2) by the hinge coupling portion (3a) It is connected to the inner side (2a) of.

그러므로, 종래의 시추선(1)은 덮개(3)가 유압실린더(4)의 구동에 의해 힌지결합부(3a)를 중심으로 회전함으로써 문풀(2)의 선저측 입구를 개폐시키게 된다.Therefore, in the conventional drilling line 1, the cover 3 rotates about the hinge coupling portion 3a by the driving of the hydraulic cylinder 4 to open and close the bottom entrance of the door pool 2.

상기한 바와 같이, 종래의 기술에 따른 시추선은, 항해 시 저항요소가 크게 3가지로 나뉘어지는데, 선형 자체의 저항이 약 55%를 차지하고, 문풀에 의한 저항이 약 25%를 차지하며, 스러스터 스케그(thruster skeg)에 의한 저항이 20%를 차지한다. 여기서, 선형에 의한 저항은 장비 배치 및 복원성 등과 밀접한 관계가 있으며, 저항 감소를 위해 선박의 방형계수를 수정할 경우 선박 본래의 취지를 살리지 못하게 될 가능성이 크다. 또한, 문풀에 의한 저항은 시추작업과 연관되어 있으므로 문풀 내부에 시추작업이 가능하도록 공간을 확보해 주는 것이 중요하다. 그리고, 스러스터 스케그에 의한 저항은 스러스터의 설치 및 유지,보수를 위한 공간 확보에서 접근하는 것이 중요하다. As described above, the drilling vessel according to the prior art is divided into three types of resistance elements when sailing, the resistance of the linear itself occupies about 55%, the resistance by the moon grass occupies about 25%, and the thruster Resistance from thruster skeg accounts for 20%. Here, the resistance due to the linearity is closely related to the arrangement of the equipment and the stability, etc., and if the square coefficient of the ship is modified to reduce the resistance, it is likely that the original purpose of the ship will not be maintained. In addition, the resistance by the door pool is associated with the drilling work, it is important to ensure a space for the drilling work inside the door pool. In addition, it is important to approach the resistance caused by the thruster skeg in securing space for installation, maintenance, and repair of the thruster.

이러한 종래 시추선의 저항요인 중 문풀 저항에 관해서는 문풀 내부에 댐핑 부가물(damping appendage)의 부착 또는 항해 시 덮개에 의해 문풀의 입구를 폐쇄시키는 방법이 사용되고 있으나, 문풀 내부에 이러한 부가물들을 부착하게 됨으로써 시추 시 라이저 핸들링(riser handling)의 어려움을 초래하며, 수리가 빈번하게 요구되는 문제점을 가지고 있었다. Among the resistance factors of the conventional drilling vessels, a method of closing the entrance of the door pool by attaching a damping appendage to the inside of the door pool or by a cover when sailing is used. This results in difficulties in handling of the riser during drilling, and frequently requires repairs.

본 발명은 상기와 같은 문제점을 해소하기 위해 안출된 것으로서, 문풀로 유입되는 유체의 흐름을 변경시켜서 문풀에 의한 저항을 감소시키도록 한다.The present invention has been made to solve the above problems, to change the flow of the fluid flowing into the door pool to reduce the resistance by the door pool.

본 발명에 따른 선박의 문풀 저항 감소장치는, 선박의 선저에 제공되며, 상기 문풀로부터 전방으로 이격되게 배치되고, 상기 선박의 하방으로 돌출되도록 마련되며, 문풀로 이동하는 유체의 흐름을 교란시킴으로써 문풀에 의한 저항을 감소시키는 저항감소부를 포함한다.The door pool resistance reduction device of the ship according to the present invention is provided on the bottom of the ship, disposed to be spaced forward from the door pool, provided to protrude downward of the ship, door pool by disturbing the flow of fluid moving to the door pool It includes a resistance reducing unit for reducing the resistance by.

본 발명은, 선저에서 문풀의 전방에 저항감소부가 돌출되도록 마련됨으로써 선박의 항해 시 유체의 흐름이 1차적으로 교란되도록 하고, 교란된 유체의 흐름이 문풀로 유입되면서 일부는 슬로싱 모션(sloshing motion)을 일으키도록 하고, 다른 일부는 슬로싱 모션을 억제하도록 함으로써 문풀에 의한 저항을 감소시키며, 문풀로 인한 선박의 속도 저하, 연료소모량 증가 등을 최소화하도록 하고, 문풀로 인해 소요되는 비용 및 노력을 최소화하도록 하는 효과를 가진다.The present invention is provided so that the resistance reduction portion protrudes in front of the door pool on the bottom of the ship so that the flow of fluid is primarily disturbed during sailing of the ship, while the flow of disturbed fluid flows into the door pool, a part of the sloshing motion (sloshing motion) To reduce the resistance of the door pool by reducing the sloshing motion, to minimize the slowing of the vessel due to the door pool, to increase fuel consumption, and to reduce the cost and effort of the door pool. It has the effect of minimizing.

이하 본 발명의 실시 예를 첨부된 도면을 참조하여 본 발명의 기술분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 더욱 상세히 설명하기로 하지만, 이는 예시에 불과한 것이며, 본 발명이 이에 제한되는 것은 아니다.DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It is not.

도 2는 본 발명의 제 1 실시예에 따른 선박의 문풀 저항 감소장치를 도시한 측면도이고, 도 3은 본 발명의 제 1 실시예에 따른 선박의 문풀 저항 감소장치를 도시한 저면도이고, 도 4는 도 2의 A-A선에 따른 단면도이다. 도시된 바와 같이, 본 발명의 제 1 실시예에 따른 선박의 문풀 저항 감소장치(100)는 선박(10)의 선저 에서 문풀(moonpool; 11)의 전방에 돌출되도록 마련되는 저항감소부(110)를 포함할 수 있다.Figure 2 is a side view showing a door pool resistance reduction device of a ship according to a first embodiment of the present invention, Figure 3 is a bottom view showing a door pool resistance reduction device of a ship according to a first embodiment of the present invention, 4 is a cross-sectional view taken along line AA of FIG. 2. As shown, the door pool resistance reduction device 100 of the ship according to the first embodiment of the present invention is a resistance reduction unit 110 is provided to protrude in front of the moonpool (moonpool) 11 from the bottom of the ship 10 It may include.

본 발명에 따른 선박의 문풀 저항 감소장치(100)는 드릴쉽(drill ship) 또는 천연가스 저장 및 생산설비선(FPSO; Floating Production, Storage and Offloading) 등과 같이 시추용 파이프, 드릴링 장치 등을 데크(deck; 12)로부터 해저 바닥으로 이동시키기 위한 통로를 제공하기 위한 문풀(11)을 가진 다양한 해상구조물에 적용될 수 있다.The door pool resistance reduction apparatus 100 according to the present invention is a deck (drill ship) or natural gas storage and production facilities (FPSO; floating production, storage and offloading), such as drilling pipes, drilling equipment, such as deck ( It can be applied to a variety of offshore structures with a door pool 11 to provide a passage for moving from deck 12 to the bottom of the sea floor.

저항감소부(110)는 선박(10)의 선저에서 문풀(11)의 전방에 돌출되도록 하나또는 다수로 마련됨으로써 문풀(11)로 이동하는 유체의 흐름을 교란시킴으로써 항해 시 등에 문풀(11)에 의해 발생되는 저항을 감소시키도록 한다. 따라서, 저항감소부(110)는 문풀(11)의 전방에서 선박(10)의 진행에 따른 유체의 흐름을 1차적으로 교란시키고, 교란된 유체의 흐름이 문풀(11)로 유입되면 일부는 슬로싱 모션(sloshing motion)을 하게 되고, 일부는 슬로싱 모션을 억제하는 역할을 하여 저항 감소를 발생시킨다.The resistance reduction unit 110 is provided by one or more so as to protrude in front of the door pool 11 from the bottom of the vessel 10 by disturbing the flow of fluid moving to the door pool 11 by the door pool 11 at the time of sailing, etc. Reduce the resistance generated. Accordingly, the resistance reduction unit 110 first disturbs the flow of the fluid according to the progress of the vessel 10 in front of the moon pool 11, and partly sloshing when the flow of the disturbed fluid flows into the moon pool 11. There is a sloshing motion, some of which serve to suppress the sloshing motion, resulting in a decrease in resistance.

문풀(11)이 선박(10)의 선수부(13)와 선미부(14) 사이에 수직으로 관통하도록 형성됨으로써 저항감소부(110)는 선박(10)의 선저에서 선수부(13)에 해당하는 위치에 돌출되도록 마련될 수 있으며, 선박(10)의 선저에 용접이나 볼트, 리벳, 스크루 등의 체결부재를 사용하여 고정될 수 있다 The door pool 11 is formed so as to vertically penetrate between the bow portion 13 and the stern portion 14 of the vessel 10 so that the resistance reducing portion 110 is located at a position corresponding to the bow portion 13 at the bottom of the vessel 10. It may be provided to protrude, and may be fixed to the bottom of the vessel 10 by using a fastening member such as welding, bolts, rivets, screws, and the like.

저항감소부(110)는 본 실시예에서 길이와 폭에 비하여 비교적 낮은 높이를 가지는 육면체일 수 있고, 일례로 길이가 6m, 폭이 10m, 높이가 10cm인 육면체로 이루어질 수 있으며, 이외에도 다양한 규격을 가질 수 있는데, 문풀(11)로 유입되는 유체 흐름의 교란에 목적이 있으므로 문풀(11) 내부에서 슬로싱 모션을 일으킬 정도의 규모가 되어서는 아니되고, 유체 흐름을 교란시킬 수 있는 정도면 충분하며, 육면체 구조뿐만 아니라 평면과 곡면 중 어느 하나로만 이루어지는 다면체이거나, 평면과 곡면의 조합으로 이루어지는 다면체이거나, 반구 형태를 가지거나, 바 형태를 가질 수 있으며, 이러한 형태 들에 대해서는 이후의 실시예들에서 다시 설명하기로 하겠다.The resistance reduction unit 110 may be a hexahedron having a relatively low height compared to the length and width in this embodiment, for example, may be made of a hexahedron having a length of 6m, a width of 10m, a height of 10cm, in addition to having a variety of standards It may be, because the purpose of the disturbance of the flow of fluid flowing into the door pool 11 is not to be large enough to cause a sloshing motion inside the door pool 11, it is enough to disturb the fluid flow, It may be a polyhedron consisting of only a flat and curved surface as well as a hexahedral structure, a polyhedron consisting of a combination of a flat surface and a curved surface, a hemispherical shape, or a bar shape, which will be described later in the following embodiments. I will explain.

저항감소부(110)는 문풀(11)로 유입되는 유체의 흐름을 교란시키기 위하여 선박(10)의 선저에서 폭방향과 길이방향 중 어느 하나의 방향으로 배열되거나, 본 실시예에서처럼 폭방향과 길이방향 모두가 조합된 방향으로 다양하게 배열될 수 있다.The resistance reduction unit 110 is arranged in either the width direction or the longitudinal direction at the bottom of the vessel 10 to disturb the flow of the fluid flowing into the door pool 11, or in the width direction and the longitudinal direction as in this embodiment All may be arranged in various ways in the combined direction.

도 5에 도시된 본 발명의 제 2 실시예에 따른 선박의 문풀 저항 감소장치에서와 같이, 저항감소부(120)는 선저에서 폭방향으로 다수개가 배열되어 이루어지는 어레이(array; B)와, 선저에서 길이방향으로 다수개가 배열되어 이루어지는 어레이(C)와, 선저에서 폭방향과 길이방향이 조합된 방향으로 다수개가 배열되어 이루어지는 어레이(D)를 나타내며, 선저에서 폭방향과 길이방향으로 조합된 방향으로 다수개가 배열 시 다각형, 일례로 본 실시예에서처럼 삼각형의 어레이(D)를 이루도록 배치될 수 있다.As in the door pool resistance reduction apparatus of the ship according to the second embodiment of the present invention shown in Figure 5, the resistance reduction unit 120 is an array (array B) is arranged in a plurality in the width direction from the bottom and the bottom The array C is arranged in the longitudinal direction, and the array D is arranged in the combined direction in the width direction and the longitudinal direction at the bottom, and in the combined direction in the width direction and the longitudinal direction at the bottom. A plurality of polygons may be arranged to form an array D of triangles as in the present embodiment, for example.

저항감소부(120)의 어레이(B,C,D)는 문풀(11)로 유입되는 유체의 흐름을 효과적으로 교란시킬 수 있도록 하기 위하여 선저에서 폭방향과 길이방향 중 어느 하 나의 방향 또는 이들이 조합된 방향으로 다양하게 배열될 수 있다.The arrays B, C, and D of the resistance reduction unit 120 may have any one of a width direction and a longitudinal direction or a combination thereof at the bottom to effectively disturb the flow of the fluid flowing into the door pool 11. It can be arranged in various ways.

도 6에 도시된 본 발명의 제 3 실시예에 따른 선박의 문풀 저항 감소장치에 의하면, 저항감소부(130)는 곡률을 가지는 다면체로 이루어질 수 있으며, 도 7에 도시된 본 발명의 제 4 실시예에 따른 선박의 문풀 저항 감소장치에 의하면, 저항감소부(140)는 선저에 수직되게 마련되는 바(bar) 형태로 이루어질 수 있다.According to the door pool resistance reduction apparatus of the ship according to the third embodiment of the present invention shown in FIG. 6, the resistance reduction unit 130 may be formed of a polyhedron having a curvature, the fourth embodiment of the present invention shown in FIG. According to the door pool resistance reduction device of the ship, the resistance reduction unit 140 may be formed in the form of a bar (bar) that is provided perpendicular to the bottom.

이와 같은 구성을 가지는 본 발명에 따른 선박의 문풀 저항 감소장치의 작용을 설명하면 다음과 같다.Referring to the action of the door pool resistance reduction device of the ship according to the present invention having such a configuration as follows.

선박(10)에서 데크(12)로부터 해저로 시추용 파이프나 드릴링 장치 등을 내려 보내기 위한 공간을 제공하는 문풀(11) 입구의 전방에 저항감소부(110,120,130,140)를 마련함으로써 기존 드릴쉽(drillship) 등이 문풀까지 균일한 유체 흐름이 유지되다가 문풀에 이르러 흐름이 교란되면서 슬로싱 모션을 일으켜 큰 내부 저항을 야기시키던 것과 달리, 저항감소부(110,120,130,140)에 의해 유체의 흐름을 1차적으로 교란시키고, 교란된 흐름이 문풀(11)로 유입되면서 일부는 슬로싱 모션을 하게 되고, 다른 일부는 슬로싱 모션을 억제하는 역할을 함으로써 저항이 감소되도록 한다.Existing drillship (drillship, etc.) by providing a resistance reducing unit (110, 120, 130, 140) in front of the entrance of the door pool 11, which provides a space for sending the drilling pipe or drilling device from the deck 12 to the seabed from the deck (10) While the uniform fluid flow is maintained up to this door pool, the flow is disturbed by the door pool, causing sloshing motion to cause a large internal resistance. As the flow enters the door pool 11, some of the sloshing motion is performed, while others serve to suppress the sloshing motion so that the resistance is reduced.

선박(10)이 항해 시 저항감소부(110,120,130,140)에 의해 문풀(11)에 의해 발생되는 저항을 감소시킴으로써 문풀(11)로 인한 선박(10)의 속도 감소 및 연료 소모량 증가 현상을 방지할 수 있으며, 문풀(11)의 벽면에 부가물이 설치된 종래의 선박 보다 비용 및 관리 측면에서 유리하다.When the ship 10 reduces the resistance generated by the door pool 11 by the resistance reduction unit 110, 120, 130, 140 at the time of sailing, it is possible to prevent the speed decrease and fuel consumption increase of the ship 10 due to the door pool 11, It is advantageous in terms of cost and management over a conventional vessel in which an additive is installed on the wall of the door pool 11.

저항감소부(110,120,130,140)는 유체의 흐름을 교란시키도록 다면체, 반구, 바 형태 등을 가짐으로써 유체의 흐름을 효과적으로 교란시킬 수 있도록 하며, 선저에서 폭방향과 길이방향 중 어느 하나의 방향 또는 이들이 조합된 방향으로 배열되거나, 다수개가 배열되어 이루어지는 어레이(B,C,D)가 선저에서 폭방향과 길이방향 중 어느 하나의 방향 또는 이들이 조합된 방향으로 배열됨으로써 유체의 흐름을 서로 상쇄시켜서 교란 효과를 높일 수 있다.The resistance reducing unit 110, 120, 130, 140 has a polyhedron, a hemisphere, a bar shape, etc. to disturb the flow of the fluid to effectively disturb the flow of the fluid, at the bottom, any one of the width direction and the longitudinal direction or a combination thereof Or arrays (B, C, D) arranged in a plurality of directions are arranged on the bottom of the ship in any one of the width direction and the longitudinal direction, or a combination thereof to cancel the flow of fluid to each other to enhance the disturbing effect. Can be.

이상에서와 같이, 본 발명의 상세한 설명에서 구체적인 실시예에 관해 설명하였으나, 본 발명의 기술이 당업자에 의하여 용이하게 변형 실시될 가능성이 자명하며, 이러한 변형된 실시예들은 본 발명의 특허청구범위에 기재된 기술사상에 포함된다할 것이다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. And will be included in the described technical idea.

도 1은 종래의 기술에 따른 시추선을 도시한 정면도이고,1 is a front view showing a drilling line according to the prior art,

도 2는 본 발명의 제 1 실시예에 따른 선박의 문풀 저항 감소장치를 도시한 측면도이고,2 is a side view showing a door pool resistance reduction apparatus of a ship according to a first embodiment of the present invention,

도 3은 본 발명의 제 1 실시예에 따른 선박의 문풀 저항 감소장치를 도시한 저면도이고,3 is a bottom view showing a door pool resistance reduction apparatus of a ship according to a first embodiment of the present invention,

도 4는 도 2의 A-A선에 따른 단면도이고,4 is a cross-sectional view taken along the line A-A of FIG.

도 6은 본 발명의 제 3 실시예에 따른 선박의 문풀 저항 감소장치를 도시한 정면도이고,6 is a front view showing a door pool resistance reduction apparatus of a ship according to a third embodiment of the present invention,

도 7은 본 발명의 제 4 실시예에 따른 선박의 문풀 저항 감소장치를 도시한 정면도이다.7 is a front view showing a door pool resistance reduction apparatus of a ship according to a fourth embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10 : 선박 11 : 선박10: ship 11: ship

12 : 데크 13 : 선수부12: Deck 13: Player

14 : 선미부 110,210,220 : 저항감소부14: Stern part 110,210,220: Resistance reduction part

Claims (5)

선박의 문풀 저항을 감소시키는 장치로서,Device for reducing the door pool resistance of the ship, 상기 선박의 선저에 제공되며, 상기 문풀로부터 전방으로 이격되게 배치되고, 상기 선박의 하방으로 돌출되도록 마련되며, 상기 문풀로 이동하는 유체의 흐름을 교란시킴으로써 상기 문풀에 의한 저항을 감소시키는 저항감소부A resistance reduction unit provided at the bottom of the ship, disposed to be spaced forward from the door pool, protruding downward of the ship, and reducing resistance by the door pool by disturbing the flow of fluid moving to the door pool 를 포함하는 선박의 문풀 저항 감소장치.Moonpool resistance reduction device of the ship comprising a. 제 1 항에 있어서,The method of claim 1, 상기 저항감소부는,The resistance reduction unit, 평면과 곡면 중 어느 하나 또는 이들의 조합으로 이루어지는 다면체이거나,반구 형태를 가지거나, 바 형태를 가지는 선박의 문풀 저항 감소장치.An apparatus for reducing the door pool resistance of a ship having a polyhedron, a hemispherical shape, or a bar shape formed of one or a combination of flat and curved surfaces. 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기 저항감소부는,The resistance reduction unit, 상기 선저에서 폭방향과 길이방향 중 어느 하나의 방향 또는 이들이 조합된 방향으로 배열되는 선박의 문풀 저항 감소장치. The door pool resistance reduction device of the ship arranged in the direction of any one of the width direction and the longitudinal direction or a combination thereof in the bottom. 제 3 항에 있어서,The method of claim 3, wherein 상기 저항감소부는,The resistance reduction unit, 다각형을 이루도록 배치되는 선박의 문풀 저항 감소장치.Door pool resistance reduction device of the ship arranged to form a polygon. 제 3 항에 있어서,The method of claim 3, wherein 상기 저항감소부는,The resistance reduction unit, 다수개가 배열되어 이루어지는 어레이가 상기 선저에서 폭방향과 길이방향 중 어느 하나의 방향 또는 이들이 조합된 방향으로 배열되는 선박의 문풀 저항 감소장치. A door pool resistance reduction apparatus of a ship in which a plurality of array is arranged in the direction of any one of the width direction and the longitudinal direction or a combination thereof in the bottom.
KR1020090086137A 2009-09-11 2009-09-11 Resistance reducing apparatus for moonpool of a ship Expired - Fee Related KR101149511B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101466055B1 (en) * 2013-04-04 2014-11-27 삼성중공업 주식회사 Sloshing reducint device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000004703A (en) * 1998-06-30 2000-01-25 이해규 Resistance reducing device of moonpool unit of ship

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000004703A (en) * 1998-06-30 2000-01-25 이해규 Resistance reducing device of moonpool unit of ship

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101466055B1 (en) * 2013-04-04 2014-11-27 삼성중공업 주식회사 Sloshing reducint device

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