JPS5961613A - Offshore platform of hybrid structure - Google Patents
Offshore platform of hybrid structureInfo
- Publication number
- JPS5961613A JPS5961613A JP16839782A JP16839782A JPS5961613A JP S5961613 A JPS5961613 A JP S5961613A JP 16839782 A JP16839782 A JP 16839782A JP 16839782 A JP16839782 A JP 16839782A JP S5961613 A JPS5961613 A JP S5961613A
- Authority
- JP
- Japan
- Prior art keywords
- tower
- caisson
- joint
- mooring
- seabed
- 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.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、海洋資源開発に使用される海洋プラットフォ
ームに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a marine platform used for marine resource development.
海底に賦存する石油、ガス鉱床等の掘削または生産に使
用されるプラットフォームとしては、ジャケット型、係
留型、ジヤツキアップ型および重力型があり、それぞれ
利点を有しているが、また欠点もある、。There are jacket type, moored type, jack-up type and gravity type platforms used for drilling or producing oil and gas deposits on the seabed, each of which has advantages but also disadvantages. .
すなわち、ジャケット型のものは、水深が概ね２００ｍ
を超えると、構造重量の増加が著しく、曳航据付も技術
的に困難となり建設期間も長く、建設費の増加が著しく
なる。係留型のうち実績のあるものは、セミサブ型およ
び一点係留ブイと船の組合せ型であるが、いずれも、海
象気象条件が厳しい場合には、動揺による稼動率の低下
は免れない。そしてこれらの型式の多くのものは海底抗
日および海中ライザーを採用しているので、その保守点
検が困難である。また、ジヤツキアップ型のものも、水
深の増大に伴い構造重量が著しく増加し、建設費が高く
なる。重力型のものも、同様に水深の増大に伴い構造重
量の増加が著しくなり。In other words, the jacket type has a water depth of approximately 200m.
If the weight exceeds 1, the weight of the structure will increase significantly, installation by towing will be technically difficult, the construction period will be long, and the construction cost will increase significantly. The mooring types that have a proven track record are the semi-sub type and the combination of a single-point mooring buoy and a ship, but both of them suffer from a drop in operating efficiency due to turbulence under severe sea and meteorological conditions. Many of these types use submarine risers and submarine risers, making maintenance and inspection difficult. In addition, the jack-up type also has a significant increase in structural weight as the water depth increases, resulting in higher construction costs. Similarly, for the gravity type, the weight of the structure increases significantly as the water depth increases.
更にプラットフォームの上部および下部構造部分を一体
構造とするために、水深の深い港湾などを建造場所とし
て手配するのが困難である。Furthermore, since the upper and lower parts of the platform are integrally constructed, it is difficult to arrange a construction site such as a deep-water harbor.
本発明は、上述のような従来の海洋プラットフォームの
欠点に鑑みなされたもので、ジャケット型、係留型およ
び重力型のそれぞれ優れた機能部分を活用して新規な型
式の海洋プラットフォームを提供せんとするものである
。すなわち１本発明は、海底に着座するケーソンと、該
ケーソン上に立設されるタワーと、該タワーに一端が取
付けられ他端が海底のアンカーに取付けられると共に。The present invention was made in view of the above-mentioned shortcomings of conventional marine platforms, and aims to provide a new type of marine platform by utilizing the superior functional parts of the jacket type, mooring type, and gravity type. It is something. That is, one aspect of the present invention includes a caisson that sits on the seabed, a tower that stands on the caisson, and one end of which is attached to the tower and the other end of which is attached to an anchor on the seabed.
その途中に中間シンカーを設けた複数の係留索を有する
係留装置とからなり、前記ケーソン上面とタワー下面と
の接合部が同心円状の同一曲率半径で球面状に形成され
た点に特徴を有するものであり、これによって、特に水
深が増加しても構造重量が少なく、耐波浪性、安定性に
優れ、曳航据付工事が容易な海洋プラットフォームの実
現が期待に示したように、ケーソン部Ａと、タワーＢと
。It consists of a mooring device having a plurality of mooring ropes with intermediate sinkers installed in the middle, and is characterized in that the joint between the upper surface of the caisson and the lower surface of the tower is formed into a concentric spherical shape with the same radius of curvature. As shown in the above, it is hoped that this will lead to the realization of an offshore platform that has low structural weight even when the water depth increases, has excellent wave resistance and stability, and is easy to tow and install. With Tower B.
タワーＢの支承部Ｃおよび係留装置りとＫより構成され
ている。It consists of a support part C of a tower B and a mooring device K.
ケーソン部Ａは、第２図にも示すようにケーソン１の中
央部に、抗弁掘削用および生産井用のコンダクタ−パイ
プ１７を通すための開口部２が設けられ、その周囲には
隔壁３によって多数のバラスト水用および生産原油貯蔵
用のタンク４，４・・・が備えられていると共に、ケー
ソン１の下面には下方に突出して海底地盤Ｅへ貫入する
スカート５が設けられている。As shown in FIG. 2, the caisson part A is provided with an opening 2 in the center of the caisson 1 through which a conductor pipe 17 for defense drilling and production wells passes, and a partition wall 3 surrounding the opening 2. A large number of tanks 4, 4, .
タワーＢは、第３図にも示すように、四隅に垂直脚６．
６・・・を配置したトラス構造体で形成され、その上端
部には坑井の掘削設備および原油の生産設備を搭載する
デツキ７が載設されている。そして、その下端部には、
後述するようにケーソン１の上面に設置した支承部に接
合する構造を備えてａる。また、タワーＢＫは、デツキ
７の搭載物重量に応じて浮力タンク（図示を略す）を付
加することができる。As shown in Figure 3, Tower B has vertical legs 6.
It is formed of a truss structure in which 6... are arranged, and a deck 7 on which well drilling equipment and crude oil production equipment are mounted is mounted at its upper end. And at the bottom,
As will be described later, the caisson 1 has a structure that connects to a support installed on the upper surface of the caisson 1. Furthermore, a buoyancy tank (not shown) can be added to the tower BK depending on the weight of the load on the deck 7.
支承部Ｃは、タワーＢをケーソン１の上面に支承する構
造部分であり、タワーＢとケーソン１とは、互に同心円
状の同一曲率半径の上方に膨らむ球面の部分をなす湾曲
面によって接合される。すなわち、ケーソン１の上面に
は、開口部２の外側に、前記球面の部分湾曲面αを形成
した小中の支承体８，８・・・が所定の間隔をおいて環
状に配設されると共に、各支承体８は互に杆体９により
連結され、ケーソン１にタワーＢの支承部を構成してい
るのである。一方、タワーＢの下端部には、各垂直脚６
およびこれらを連結しているボックスガータに設けた接
合脚体１０，１０・・・を介して、前記の環状に配設さ
れた各支承体８上に当接するように環状に形成されると
共に、支承体８と対応する個所に、支承体８と対応する
湾曲接合面１２を形成した環状の接合体１１が設けられ
ている。したがって、タワーＢに外力が作用して動揺す
る場合には、ケーソン１の支承体とタワーＢの接合体１
１との湾曲接合面は相対的に滑動が許容される。また、
タワーＢの湾曲接合面部分は支承体８より若干広巾とし
てあり、その外側には、タワーＢの鉛直軸まわりの回転
を防止するためのストッパ１３が設けられている。The support part C is a structural part that supports the tower B on the upper surface of the caisson 1, and the tower B and the caisson 1 are joined by a curved surface that is a concentric spherical part that bulges above the same radius of curvature. Ru. That is, on the upper surface of the caisson 1, on the outside of the opening 2, small and medium supports 8, 8, . At the same time, each support body 8 is connected to each other by a rod 9, and constitutes a support portion of the tower B on the caisson 1. On the other hand, each vertical leg 6 is provided at the lower end of the tower B.
and are formed in an annular shape so as to abut on each of the annularly arranged support bodies 8 via joint legs 10, 10... provided on the box garter connecting these, and An annular joined body 11 having a curved joint surface 12 corresponding to the supporting body 8 is provided at a location corresponding to the supporting body 8 . Therefore, when an external force acts on tower B and causes it to sway, the support of caisson 1 and the joint 1 of tower B
The curved joint surface with 1 is allowed to slide relatively. Also,
The curved joint surface portion of the tower B is slightly wider than the support 8, and a stopper 13 is provided on the outside thereof to prevent rotation of the tower B about the vertical axis.
係留装置りは、タワーＢの立設状態を確保させるための
もので、タワーＢの上部に一端を固定した係留索１４の
複数を放射状に張出して、その中間部を中間シンカー１
５により海底地盤Ｅに固定すると共に、先端部を更にア
ンカー１６により固定するのである。そして１通常時で
は、中間シンカー１５をアンカーとして作用させ、タワ
ーＢは中間シンカー１５とタワー８間の係留索により支
持されるが。The mooring device is to ensure that the tower B is in an upright position, and has a plurality of mooring cables 14 fixed to the upper part of the tower B, one end of which is extended radially, and the middle part of the mooring cables 14 is fixed to the upper part of the tower B.
5 to the seabed ground E, and the tip portion is further fixed by an anchor 16. In the normal state, the intermediate sinker 15 acts as an anchor, and the tower B is supported by the mooring cable between the intermediate sinker 15 and the tower 8.
異常環境時など外力荷重が大きくなると中間シンカー１
５は持ち上り、アンカー１６からタワーＢまでの係留索
１４全体でタワーＢは支持されることになるのである。When the external force load increases, such as in abnormal environments, the intermediate sinker 1
5 is lifted up, and the entire mooring cable 14 from the anchor 16 to the tower B supports the tower B.
第４図は本発明の他の実施例を示したもので、前述の実
施例と異るところは、支承部Ｃの構成にある。すなわち
、支承体８およびこれに接合する環状接合体１１の湾曲
接合面を前述の実施例の場合とは反対に下方に向けて膨
出する球面１７に基く湾曲面に形成している。この場合
もタワーＢの支承作用については前述の実施例と同様で
ある。なお。FIG. 4 shows another embodiment of the present invention, which differs from the previous embodiment in the structure of the support portion C. That is, the curved joint surfaces of the support body 8 and the annular joint body 11 joined thereto are formed into curved surfaces based on the spherical surface 17 that bulges downward, contrary to the case of the previous embodiment. In this case as well, the supporting action of tower B is the same as in the previous embodiment. In addition.
その他の構成については前述の実施例と同じであるから
、均等なものに同一符号を付しただけで説明は省略する
。Since the other configurations are the same as those of the previous embodiment, the same reference numerals are given to the equivalent parts and the explanation will be omitted.
以上説明したように１本発明のノーイブリッド構造の海
洋プラットフォームは、海底に着座するコンクリート與
重力屋ケーソンと、該ケーソン上に立設される柔構造の
タワーと、該タワーに一端が固定され他端が海底のアン
カーに取付けられると共に、その途中に中間シンカーを
設けた複数の係留索を有する係留装置とからなっており
、前記ケーソンの上面とタワー下面との接合部が同心固
状の同一曲率半径による球面状に形成したので、次のよ
うに多くの優れた効果を奏するものである。As explained above, the offshore platform with a no-brid structure according to the present invention includes a concrete caisson that sits on the seabed, a tower with a flexible structure that is erected on the caisson, and one end of which is fixed to the tower. The mooring device consists of a plurality of mooring lines whose ends are attached to an anchor on the seabed and intermediate sinkers are provided in the middle, and the joint between the upper surface of the caisson and the lower surface of the tower is concentric and rigid and has the same curvature. Since it is formed into a spherical shape with a radius, it has many excellent effects as described below.
（１） タワーは柔構造であるため、その固有振動周
期を波周期および地震周期との同調を避けるように大き
くすることができる。(1) Since the tower has a flexible structure, its natural vibration period can be increased to avoid synchronization with wave periods and earthquake periods.
（２） タワーを係留索で支持したことにより、水深
の増大に伴う重量の増加は、ジャケット型、重力型、ま
たはジヤツキアップ型に比べて非常に少ない。しかも、
係留索はその中途に中間シンカーを設けたので１通常時
はシンカーまでの係留索の張設角度が適度であるが、外
力の大きく働く異常環境時には、タワーの揺動に対して
。(2) Because the tower is supported by mooring lines, the increase in weight with increasing water depth is much smaller than that of the jacket type, gravity type, or jack-up type. Moreover,
Since the mooring line has an intermediate sinker in the middle, 1. Under normal conditions, the angle at which the mooring line is stretched to the sinker is appropriate, but in abnormal environments where large external forces act, it can prevent the tower from swinging.
係留索の張設角度が大きくなると共に、中間シンカーの
重錘作用が働いて、揺動を適度に制御することができる
。As the tension angle of the mooring cable becomes larger, the weight action of the intermediate sinker works, making it possible to appropriately control the swinging.
（３）タワーとケーソンとの接合部は球面接合によるた
め、タワーに加わる水平外力による曲げモーメントを生
じない。(3) Since the joint between the tower and the caisson is a spherical joint, no bending moment is generated due to horizontal external force applied to the tower.
（４） ケーソンはコンクリート製の重力型としたの
で、貯油機能を備えることができると共に、沈設に際し
大規模な土木工事を必要とせず、曳航据付費が安価であ
る。(4) Since the caisson is a gravity type made of concrete, it can have an oil storage function, and does not require large-scale civil engineering work when it is sunk, so the towing installation cost is low.
（５） ケーソンとタワーはそれぞれ別個に既設の施
設で建造することができ、曳航にも便利であると共に、
全体の建設期間を短縮することができる。(5) The caissons and towers can be constructed separately at existing facilities, which is convenient for towing.
The overall construction period can be shortened.
第１図は本発明ハイブリッド構造の海洋プラットフォー
ムの一実施例を示した一部縦断正面図。
第２図はケーソンと支承体の個所を示した平面図。
第３図はケーソンとタワーとの接合部の状態を示した斜
面図、第４図は本発明の他の実施例を示す正面図である
。
Ａ・・・ケーソン部、Ｂ・・・タワー、Ｃ・・・支承部
、Ｄ・・・係留装置、Ｅ・・・海底地盤、１・・・ケー
ソン、２・・・開口部、５ｔ・・スカート、６・・・垂
直脚、７・・・デツキ、８・・・支承体、１１・・・接
合体、１４・・・係留索、１５・・・中間シンカー、１
６・・・アンカーFIG. 1 is a partially longitudinal front view showing an embodiment of a marine platform having a hybrid structure according to the present invention. Figure 2 is a plan view showing the caisson and supporting body. FIG. 3 is a perspective view showing the state of the joint between the caisson and the tower, and FIG. 4 is a front view showing another embodiment of the present invention. A... Caisson part, B... Tower, C... Supporting part, D... Mooring device, E... Seabed ground, 1... Caisson, 2... Opening, 5t... Skirt, 6... Vertical leg, 7... Deck, 8... Support body, 11... Joint body, 14... Mooring rope, 15... Intermediate sinker, 1
6...Anchor
Claims (1)
ケーソン上に立設される柔構造によるタワーと、該タワ
ーに一端が固定され他端が海底のアンカーに取付けられ
ると共Ｋ、その途中に中間シンカーを設けた複数の係留
索を有する係留装置とからなり、前記ケーソンの上面と
タワー下面との接合部が同心円状の同一曲率半径による
球面状に形成されていることを特徴とする、ハイブリッ
ド構造の海洋プラットフォーム。A concrete gravity-type caisson that sits on the seabed, a flexible tower that stands on top of the caisson, one end of which is fixed to the tower and the other end that is attached to an anchor on the seabed. A hybrid structure comprising a mooring device having a plurality of mooring ropes provided with sinkers, and characterized in that the joint between the upper surface of the caisson and the lower surface of the tower is formed into a concentric spherical shape with the same radius of curvature. marine platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16839782A JPS5961613A (en) | 1982-09-29 | 1982-09-29 | Offshore platform of hybrid structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16839782A JPS5961613A (en) | 1982-09-29 | 1982-09-29 | Offshore platform of hybrid structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5961613A true JPS5961613A (en) | 1984-04-07 |
| JPS6331609B2 JPS6331609B2 (en) | 1988-06-24 |
Family
ID=15867356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16839782A Granted JPS5961613A (en) | 1982-09-29 | 1982-09-29 | Offshore platform of hybrid structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5961613A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60215912A (en) * | 1983-09-22 | 1985-10-29 | アントルポゼ ジエ．テ．エム．プ−ル レ トラボウ プトロリエ−ル マリテイム エ．テ．ペ．エム． | Flexible ocean platform |
| JP2014503729A (en) * | 2011-01-28 | 2014-02-13 | エクソンモービル アップストリーム リサーチ カンパニー | Submarine production system with Arctic production tower |
| CN103741657A (en) * | 2013-12-27 | 2014-04-23 | 中铁大桥局集团第一工程有限公司 | Construction method of large multifunctional over-water construction platform |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58127817A (en) * | 1982-01-27 | 1983-07-30 | Mitsui Eng & Shipbuild Co Ltd | Off-shore heliport |
-
1982
- 1982-09-29 JP JP16839782A patent/JPS5961613A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58127817A (en) * | 1982-01-27 | 1983-07-30 | Mitsui Eng & Shipbuild Co Ltd | Off-shore heliport |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60215912A (en) * | 1983-09-22 | 1985-10-29 | アントルポゼ ジエ．テ．エム．プ−ル レ トラボウ プトロリエ−ル マリテイム エ．テ．ペ．エム． | Flexible ocean platform |
| JP2014503729A (en) * | 2011-01-28 | 2014-02-13 | エクソンモービル アップストリーム リサーチ カンパニー | Submarine production system with Arctic production tower |
| US9260949B2 (en) | 2011-01-28 | 2016-02-16 | Exxonmobil Upstream Research Company | Subsea production system having arctic production tower |
| CN103741657A (en) * | 2013-12-27 | 2014-04-23 | 中铁大桥局集团第一工程有限公司 | Construction method of large multifunctional over-water construction platform |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6331609B2 (en) | 1988-06-24 |
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