JPS58180394A - Mooring structure - Google Patents
Mooring structureInfo
- Publication number
- JPS58180394A JPS58180394A JP6362982A JP6362982A JPS58180394A JP S58180394 A JPS58180394 A JP S58180394A JP 6362982 A JP6362982 A JP 6362982A JP 6362982 A JP6362982 A JP 6362982A JP S58180394 A JPS58180394 A JP S58180394A
- Authority
- JP
- Japan
- Prior art keywords
- mooring
- hole
- vertical
- hull
- drill pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009412 basement excavation Methods 0.000 claims description 10
- 238000005553 drilling Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
-
- 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
- E02B17/0017—Means for protecting offshore constructions
- E02B17/0021—Means for protecting offshore constructions against ice-loads
-
- 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
- B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
- B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
- B63B2001/044—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull with a small waterline area compared to total displacement, e.g. of semi-submersible type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B2211/00—Applications
- B63B2211/06—Operation in ice-infested waters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は係留構造物に関し、特に、船体に形成された鉛
直貫通孔を通して掘削ドリルパイプを海底へ延在させて
石油掘削などの海底掘削作業を行なう係留構造物に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mooring structure, and more particularly to a mooring structure for performing seabed excavation work such as oil drilling by extending an excavation drill pipe to the seabed through a vertical through hole formed in a ship's hull.
石油需要の高騰に伴ない海底油田の開発が益んに行なわ
れている。また、その他の海底資源の調査開発も益んに
行なわれている。これらの開発を進めるため移動可能な
掘削装置として係留構造物が使用される。As demand for oil soars, offshore oil fields are being developed to great advantage. Research and development of other seabed resources is also being carried out fruitfully. Mooring structures are used as movable drilling equipment to advance these developments.
この種の係留構造物は、例えば、直径あるいけ縦横寸法
が１００ｍ近くもあり、排水量にして３〜４万トンに達
する大型の構造物であり、多数（例えば１２本）の係留
索を使用しこれらの先端に連結されるアンカーによって
海上所定位置に係留される。This type of mooring structure is, for example, a large structure with a diameter of nearly 100 meters, a displacement of 30,000 to 40,000 tons, and a large number of mooring lines (for example, 12). It is moored at a predetermined position on the sea by anchors connected to its tips.
か＼る石油掘削装置などの海底掘削用の係留構造物では
、船体内に鉛直貫通孔を形成し、デツキ上の掘削機で駆
動される掘削ドリルパイプを該貫通孔を通して海底へ延
在させて作業が行なわれる。In mooring structures for offshore drilling such as oil drilling rigs, a vertical through hole is formed in the hull, and a drilling drill pipe driven by a drilling machine on the deck is extended to the seabed through the through hole. work is done.
しかして、従来のこの種の係留構造物では、前記鉛直貫
通孔は船底で開口する孔として形成されていたので、寒
冷海域など流氷が存在する水海で使用する場合、船首側
（流氷が衝突する側）の外壁で割られた氷塊の一部が船
底部の海中に散乱し船底開口から前記鉛直貫通孔内へ浸
入し、該貫通孔内を通して設置されている掘削ドリルパ
イプや係留索が損傷を受けるという問題があった。However, in conventional mooring structures of this type, the vertical through-holes were formed as holes that opened at the bottom of the ship. Some of the ice blocks that were broken by the outer wall of the ship's bottom were scattered in the sea at the bottom of the ship and entered the vertical through-hole through the bottom opening, damaging the drilling drill pipe and mooring cables installed through the through-hole. There was a problem with receiving it.
本発明は、このような従来技術の問題に鑑みてなされた
ものであり、掘削ドリルパイプ挿通用の貫通孔内への流
氷の浸入を防止しうる係留構造物を提供することを目的
とする。The present invention has been made in view of the problems of the prior art, and it is an object of the present invention to provide a mooring structure that can prevent drift ice from penetrating into a through hole for inserting an excavation drill pipe.
本発明によれば、係留索およびその先端に連結されたア
ンカーにより海上所定位置に係留され、船体に形成され
た鉛直貫通孔を通１〜て掘削ドリルパイプを海底へ延在
させて海底掘削作業を行なう係留構造物において、前記
鉛直貫通孔の船底開口部の周囲から下方へ突出しかつ下
端外周に張出し部を有する筒状体を設けることを特徴と
する係留構造物が提供される。According to the present invention, the ship is moored at a predetermined position on the sea by means of a mooring cable and an anchor connected to the tip thereof, and an excavation drill pipe is extended to the seabed through a vertical through hole formed in the hull, thereby carrying out submarine excavation work. There is provided a mooring structure characterized in that a cylindrical body is provided that protrudes downward from the periphery of the bottom opening of the vertical through hole and has an overhang on the outer periphery of the lower end.
この場合、前記筒状体を船体に対し突出位置および引込
み位置に調整可能にし、曳航時の抵抗を減少しうるよう
にすることが好ましい。In this case, it is preferable that the cylindrical body be adjustable to a protruding position and a retracted position with respect to the hull, thereby reducing resistance during towing.
以下、図面を参照して本発明の詳細な説明する。Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図および第２図は本発明の一実施例を示す図である
。FIG. 1 and FIG. 2 are diagrams showing one embodiment of the present invention.
係留構造物の船体ｌのはｙ中央部には鉛直貫通孔２が形
成され、該貫通孔まわりのデツキ３に設置された複数個
（レリえば１２個）の巻揚機４から該貫通孔を通して海
中へ延在する複数本の係留索５および各係留索先端に連
結されたアンカー６によって係留構造物が海上所定位置
に係留されている。A vertical through hole 2 is formed in the center of the hull of the mooring structure, and a plurality of winding machines 4 (12 in this case) installed on the deck 3 around the through hole pass through the through hole. A mooring structure is moored at a predetermined position on the sea by a plurality of mooring cables 5 extending into the sea and anchors 6 connected to the tips of each mooring cable.
デツキ３上には掘削機（図示せず）を設置するためのや
ぐら７が固定され、該掘削機で駆動される掘削ドリルパ
イプ８は前記鉛直貫通孔２内を通って海底へ延在してい
る。A tower 7 for installing an excavator (not shown) is fixed on the deck 3, and an excavation drill pipe 8 driven by the excavator passes through the vertical through hole 2 and extends to the seabed. There is.
前記鉛直貫通孔２の船底開口部の周囲には、船底から下
方へ突出する筒状体９が設けられている。A cylindrical body 9 protruding downward from the bottom of the ship is provided around the bottom opening of the vertical through hole 2 .
この筒状体の下端外周には張出し部ＩＯが形成されてい
る。An overhanging portion IO is formed on the outer periphery of the lower end of this cylindrical body.
なお、筒状体１０の内面には各係留索５を案内するため
の滑車１１が設けられ、係留索５が鉛直貫通孔２または
筒状体９に接触しないよう措置されている。A pulley 11 for guiding each mooring cable 5 is provided on the inner surface of the cylindrical body 10 to prevent the mooring cable 5 from coming into contact with the vertical through hole 2 or the cylindrical body 9.
また、前記船体ｌの外壁は少なくとも水面Ｗ（喫水面）
近傍の部分では下方内方へ角度θで傾斜する形状を有し
ている。Further, the outer wall of the hull l is at least at the water surface W (draft surface).
Nearby portions have a shape that is inclined downward and inward at an angle θ.
以上説明した係留構造物を水海で使用する場合、水面Ｗ
近傍を浮遊して矢印Ａ方向へ流れる流氷１２が船体外壁
に衝突すると、流氷は図示の如く割れて多数の氷塊１２
ＡｔＫなる。船体１が受ける流氷力は外壁が角度θで傾
斜している分だけ軽減されるが、割れた氷塊ｔ２Ａの一
部は水中へ散乱され船底近傍を流れる。When using the mooring structure explained above in water, the water surface W
When the drift ice 12 floating nearby and flowing in the direction of arrow A collides with the outer wall of the ship, the drift ice breaks into many ice blocks 12 as shown in the figure.
AtK becomes. The drift ice force applied to the hull 1 is reduced by the amount that the outer wall is inclined at the angle θ, but some of the broken ice blocks t2A are scattered into the water and flow near the bottom of the ship.
しかして、本実施例では、前記筒状体９が設けられてい
るので、氷塊１２Ａが鉛直貫通孔２内へ浸入したり掘削
ドリルパイプ８および係留索５に直接衝突したシするこ
とを防止することができ、掘削ドリルパイプおよび係留
索を損傷から保護することができる。In this embodiment, since the cylindrical body 9 is provided, the ice block 12A is prevented from entering the vertical through hole 2 or colliding directly with the excavation drill pipe 8 and the mooring cable 5. It can protect the drilling drill pipe and mooring line from damage.
また、筒状体９の下端外周に張出し部１０が形成されて
いるので、係留構造物の揺れすなわち上下動を辺めピッ
チング、ローリングなど６自由度方向の揺れを抑制でき
るという効果も得られる。Further, since the overhanging portion 10 is formed on the outer periphery of the lower end of the cylindrical body 9, it is possible to suppress the shaking of the mooring structure, that is, the vertical movement, and the shaking in six degrees of freedom directions such as pitching and rolling.
第３図および第４図は本発明の他の実施例を示す図であ
る。FIGS. 3 and 4 are diagrams showing other embodiments of the present invention.
本実施例は、中心部に鉛直貫通孔２が形成されて係留索
５およびその先端に連結され九アンカー６により海上所
定位置に係留される係留体１３と該係留体に対しベアリ
ング１４を介して回転可能に組付けられる可動船体１５
とで船体１を構成する点、並びに、鉛直貫通孔２の船底
開口部の周囲に設けられる筒状体９が油圧等で駆動され
るシリンダＩ６によって図示の突出位置と船体ｌ内への
引込み位置とに位置調整できる点で前述の実施例と相異
しており、その他は実質止金て同じである。This embodiment has a mooring body 13 which has a vertical through hole 2 formed in its center and is connected to a mooring cable 5 and its tip and is moored at a predetermined position on the sea by nine anchors 6. Movable hull 15 rotatably assembled
and the points that constitute the hull 1, and the cylindrical body 9 provided around the bottom opening of the vertical through hole 2 is moved to the protruding position shown in the figure and the retracted position into the hull l by the cylinder I6 driven by hydraulic pressure or the like. The clasp is different from the previous embodiment in that the position can be adjusted, and the rest is essentially the same as the clasp.
したがって、同一部分または対応部分にそれぞれ同−符
号を付してその詳細な説明を省略する。Therefore, the same or corresponding parts will be given the same reference numerals, and detailed explanation thereof will be omitted.
本実施例によれば、水海で使用するに際し、前述の実施
例と同じ作用、効果が得られる他、船体１を係留体１３
と可動船体Ｉ５とで構成したので流氷力に応じて可動船
体１５が方向変化することができその分だけ流氷力を緩
和することができるという効果、並びに筒状体９を引込
み位置に調整できるので曳航時における抵抗を減少させ
ることができるという効果が得られる。According to this embodiment, when used in water and sea, the same functions and effects as those of the above-mentioned embodiments can be obtained, and the hull 1 can be connected to the mooring body 13.
and the movable hull I5, the movable hull 15 can change direction in response to the force of the ice floes, and the force of the floes can be alleviated accordingly, and the cylindrical body 9 can be adjusted to the retracted position. The effect is that the resistance during towing can be reduced.
以上の説明から明らかなごとく、本発明によれば、鉛直
貫通孔内への流氷の浸入を阻止することにより該貫通孔
を逸して配置される掘削ドリルパイプおよび係留索を流
氷から保護すると同時に船体の上下揺動を抑制すること
ができる係留構造物が得られる。As is clear from the above description, according to the present invention, by preventing drift ice from entering the vertical through hole, drilling drill pipes and mooring lines placed outside the vertical through hole are protected from drift ice, and at the same time, the ship's hull A mooring structure capable of suppressing vertical swinging of the mooring structure is obtained.
第１図は本発明の一実施例の平面図、第２図は第１図中
の線■−■に沿う縦断面図、第３図は本発明の他の実施
例の平面図、第４図は第３図中の線■−ＩＶに沿う縦断
面図である。
１・・・船体、 ２・・・鉛直貫通孔、３
・・・デツキ、 ４・・・巻揚機、５・パ係
留索、 ６・・・アンカー、８・・・掘削ド
リルパイプ、９°°°筒状体〜１０・・・張出し部、
１２．１２Ａ・・・流氷、Ａ・・・流氷の流れ方
向、 Ｗ・・・水面。
代理人 鵜 沼 辰 之
（ほか２名）
く坩
悶FIG. 1 is a plan view of one embodiment of the present invention, FIG. 2 is a longitudinal sectional view taken along the line ■-■ in FIG. 1, FIG. 3 is a plan view of another embodiment of the present invention, and FIG. The figure is a longitudinal sectional view taken along the line -IV in FIG. 3. 1... Hull, 2... Vertical through hole, 3
...Deck, 4.Hoisting machine, 5.Mooring rope, 6.Anchor, 8.Excavation drill pipe, 9°°°cylindrical body to 10.Overhanging part,
12.12A...Drift ice, A...Flow direction of the drift ice, W...Water surface. Agent: Tatsuyuki Unuma (and 2 others)
Claims (3)
により海上所定位置に保留され、船体に形成された鉛直
貫通孔を通して掘削ドリルパイプを海底へ延在させて海
底掘削作業を行彦う係留構造物において、前記鉛直貫通
孔の船底開口部の周囲から下方へ突出しかつ下端外周に
張出し部を有する筒状体を設けることを特徴とする係留
構造物。(1) In a mooring structure that is held at a predetermined position on the sea by a mooring cable and an anchor connected to the tip of the mooring cable, and performs submarine excavation work by extending an excavation drill pipe to the seabed through a vertical through hole formed in the hull of the ship. A mooring structure, characterized in that a cylindrical body is provided that protrudes downward from the periphery of the bottom opening of the vertical through hole and has an overhang on the outer periphery of the lower end.
み位置に調整できることを特徴とする特許請求の範囲第
（１）項記載の係留構造物。(2) The mooring structure according to claim (1), wherein the cylindrical body can be adjusted to a protruding position and a retracted position with respect to the hull.
たアンカーによ如海上所定位置に係留される係留体と該
係留体に対し回転可能に組付けられる可動体とを備え、
前記鉛直貫通孔が前記係留体の中心部に形成されること
を特徴とする特許請求の範囲第＋１１項または第（２）
項記載の係留構造物。(3) The ship body includes a mooring body moored at a predetermined position on the sea by a mooring line and an anchor connected to the tip thereof, and a movable body rotatably attached to the mooring body,
Claim No. 11 or (2), wherein the vertical through hole is formed in the center of the mooring body.
Mooring structures described in Section 1.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6362982A JPS58180394A (en) | 1982-04-16 | 1982-04-16 | Mooring structure |
| GB08307998A GB2118903B (en) | 1982-04-16 | 1983-03-23 | Floating offshore structure |
| US06/478,327 US4519728A (en) | 1982-04-16 | 1983-03-24 | Floating offshore structure |
| CA000425226A CA1213788A (en) | 1982-04-16 | 1983-04-05 | Floating offshore structure |
| DE3312951A DE3312951C2 (en) | 1982-04-16 | 1983-04-11 | Floating structure |
| SE8302074A SE457523B (en) | 1982-04-16 | 1983-04-14 | FLOATING CONSTRUCTION FOR SEA TECHNOLOGY |
| NO831342A NO161788C (en) | 1982-04-16 | 1983-04-15 | LIQUID CONSTRUCTION. |
| ES521493A ES521493A0 (en) | 1982-04-16 | 1983-04-15 | IMPROVEMENTS IN FLOATING STRUCTURES FOR OPEN SEA. |
| US06/712,131 US4571125A (en) | 1982-04-16 | 1985-03-15 | Floating offshore structure |
| CA000507928A CA1227379A (en) | 1982-04-16 | 1986-04-29 | Floating offshore structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6362982A JPS58180394A (en) | 1982-04-16 | 1982-04-16 | Mooring structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58180394A true JPS58180394A (en) | 1983-10-21 |
Family
ID=13234820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6362982A Pending JPS58180394A (en) | 1982-04-16 | 1982-04-16 | Mooring structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58180394A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5647295A (en) * | 1995-09-25 | 1997-07-15 | Korsgaard; Jens | Apparatus for mooring a vessel to a submerged mooring element |
| WO2014103557A1 (en) * | 2012-12-26 | 2014-07-03 | 独立行政法人石油天然ガス・金属鉱物資源機構 | Floating structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50147401A (en) * | 1974-05-16 | 1975-11-26 | ||
| JPS5123988A (en) * | 1974-08-20 | 1976-02-26 | Mitsui Shipbuilding Eng | KAICHUKEIRYUSOCHI |
-
1982
- 1982-04-16 JP JP6362982A patent/JPS58180394A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50147401A (en) * | 1974-05-16 | 1975-11-26 | ||
| JPS5123988A (en) * | 1974-08-20 | 1976-02-26 | Mitsui Shipbuilding Eng | KAICHUKEIRYUSOCHI |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5647295A (en) * | 1995-09-25 | 1997-07-15 | Korsgaard; Jens | Apparatus for mooring a vessel to a submerged mooring element |
| WO2014103557A1 (en) * | 2012-12-26 | 2014-07-03 | 独立行政法人石油天然ガス・金属鉱物資源機構 | Floating structure |
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