JPS58146614A - Construction of off-shore structure - Google Patents
Construction of off-shore structureInfo
- Publication number
- JPS58146614A JPS58146614A JP57028604A JP2860482A JPS58146614A JP S58146614 A JPS58146614 A JP S58146614A JP 57028604 A JP57028604 A JP 57028604A JP 2860482 A JP2860482 A JP 2860482A JP S58146614 A JPS58146614 A JP S58146614A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- jacket
- movable
- movable tank
- temporarily
- 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
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
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
-
- 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
- B63B35/003—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for for transporting very large loads, e.g. offshore structure modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B77/00—Transporting or installing offshore structures on site using buoyancy forces, e.g. using semi-submersible barges, ballasting the structure or transporting of oil-and-gas platforms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は海洋構造物の構築方法、特に海洋石油生産用海
洋構造物の構築方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing an offshore structure, particularly a method of constructing an offshore structure for offshore oil production.
従来海底油田の開発システムとしては、ジャケット（鋼
管骨組構造物）を海底に杭で固定し、その後前記ジャケ
ット上に生産設備を搭載し、がっ−上基地までジャケッ
トから海底パイプラインを敷設してなるもの勢がある。Conventional undersea oil field development systems involve fixing a jacket (steel pipe frame structure) to the seabed with piles, then mounting production equipment on top of the jacket, and laying an undersea pipeline from the jacket to the Gakkou base. There is a force to be reckoned with.
しかし、仁の様な従来の開発システムは前述の海底パイ
プラインの敷設が高価になってしまい沖合の中小規模油
田の開発システムとしては不経済にすぎるものである。However, conventional development systems such as Jin's are too uneconomical as a development system for small and medium-sized offshore oil fields because the installation of the aforementioned submarine pipeline becomes expensive.
とζろで中小規模油田の開発システムの考え方としては
、
■ 原則として、海底における杭打ち作業のない、いわ
ゆる重力式が好ましい。As a general rule, the so-called gravity method, which does not require pile driving on the seabed, is preferable as a development system for small and medium-sized oil fields.
■ 失意設備Ｏ海洋での現場搭載を原則として廃止する
のが好ましい。■ Disappointing Equipment O In principle, it is preferable to abolish on-site installation at sea.
■ 長距離パイプツイン工事を不要とすることが好まし
い。■ It is preferable to eliminate the need for long-distance pipe twin construction.
等の要請がある。There are requests such as
しかして本発明は、この様な要請を考慮し、かつコスト
パフオー１ンスの高い中小規模油田システム、換言すれ
ば海洋構造物の構築方法を提供することを目的とするも
のである。SUMMARY OF THE INVENTION The present invention takes these demands into consideration and aims to provide a method for constructing a medium-sized and small-scale oil field system with high cost performance, in other words, a method for constructing an offshore structure.
以下本発明を図面に示す一実施例に着いて説明する。The present invention will be described below with reference to an embodiment shown in the drawings.
先ず、可動タンク１を形成する。可動タンク１は方形状
に枠組みされた支持枠２と鋏支持枠２の両飼よりブラケ
ット３．３を介して取付けられている中空部を有する一
対の円筒状のタンク４，４より構成される。First, the movable tank 1 is formed. The movable tank 1 is composed of a pair of cylindrical tanks 4, 4 each having a hollow portion, which are attached via brackets 3.3 to the support frame 2 and the scissor support frame 2, which are framed in a rectangular shape. .
次に上ジャケット５を形成し、該上ジャケット５の後端
部を可動タンク１の支持枠２に仮止めする（５８３図）
。その後、上ジャケット５の先端面にデツキ６を取付け
ると共にデツキ６上に生産設備７を載置固定する。Next, the upper jacket 5 is formed, and the rear end of the upper jacket 5 is temporarily fixed to the support frame 2 of the movable tank 1 (Fig. 583).
. Thereafter, a deck 6 is attached to the top end surface of the upper jacket 5, and the production equipment 7 is mounted and fixed on the deck 6.
また、第５図に示すように下ジャケット８を形成すると
共に、この下ジャケット８をボトムタンク９に略直角に
連結する（第７図参照）。Further, as shown in FIG. 5, a lower jacket 8 is formed, and this lower jacket 8 is connected to the bottom tank 9 at a substantially right angle (see FIG. 7).
ところで、可動タンク１を仮止めしである上ジャケット
５とボトムタンク９に略直角に連結されている下ジャケ
ット８とは第８図に示すように海洋中で接続されるもの
である。Incidentally, the upper jacket 5, which temporarily fastens the movable tank 1, and the lower jacket 8, which is connected approximately at right angles to the bottom tank 9, are connected in the ocean as shown in FIG.
すなわち、ボトムタンク９と連結しである下ジャケット
８を海洋中に係留索１０．１０等を介して仮設置してお
く。次いで、可動夕／り１を仮止めしである上ジャケッ
ト５を海洋中に移動し、前記海洋中に仮設置しである下
ジャケット８の上端部１１に上ジャケット５の下端部゛
１２を載置し、１１１！＊により両ジャケット５，８を
接続する。That is, the lower jacket 8 connected to the bottom tank 9 is temporarily installed in the ocean via mooring lines 10, 10, etc. Next, the upper jacket 5, which temporarily holds the movable boat 1, is moved into the ocean, and the lower end 12 of the upper jacket 5 is placed on the upper end 11 of the lower jacket 8, which is temporarily installed in the ocean. Put it down, 111! * Connect both jackets 5 and 8.
その後下ジャケット８を仮設置し九係留索１へ１０都を
離脱すると上ジャケット５及び下ジャケット８を接続し
て形成されたジャケット体１３は可動タンク１の浮力に
よシ海洋中に浮上する。Thereafter, when the lower jacket 8 is temporarily installed and the 10 ropes are detached from the 9 mooring lines 1, the jacket body 13 formed by connecting the upper jacket 5 and the lower jacket 8 floats in the ocean due to the buoyancy of the movable tank 1.
その状態で曳船１４により海洋中の設置位置まで曳航す
る。ところでこの曳航の安定性はきわめて良好である。In this state, the towboat 14 tows it to the installation location in the ocean. By the way, the stability of this towing is extremely good.
すなわちジャケット体１３はボトムタンク９と可動夕／
りｌとを適切にバラスティングすることによシ海洋中に
おいて重心がさがると共に浮心を上げることが出来垂直
に保持しうるからである。That is, the jacket body 13 is connected to the bottom tank 9 and the movable tank 9.
This is because by appropriately ballasting the ship, the center of gravity can be lowered and the center of buoyancy can be raised and maintained vertically in the ocean.
沖合の設置位置まで曳航した後、可動タンク１の仮止め
を離脱し、腋可動ターンク１のタンク４内に海水を注入
する１、すると可動タンクはその浮力を徐々に減じ、ジ
ャケット体１３のレグ１５に沿って下方に摺動する。そ
して可動タンク１をボトムタンク９上に重錘として載置
させる。これによりジャケット体１３は可動タンクｌの
荷重によシ海洋中に設置されることになる。After being towed to the offshore installation position, the movable tank 1 is released from the temporary fixings, and seawater is injected into the tank 4 of the armpit movable tank 1. Then, the movable tank gradually reduces its buoyancy and the leg of the jacket body 13 15. Then, the movable tank 1 is placed on the bottom tank 9 as a weight. As a result, the jacket body 13 is installed in the ocean due to the load of the movable tank 1.
なお、可動タンク１の荷重のみではジャケット体１３の
海洋中における横移動防止が不充分となることがある。Note that the load of the movable tank 1 alone may not be sufficient to prevent the jacket body 13 from moving laterally in the ocean.
よってこの様な場合には、ボトムタ／り９の底面に長さ
を不揃いにした突起物１６・・を形成しておき、ジャケ
ット体１３及び可動タンク１の荷重により該突起物１６
・・を海底中に挿入するものとする。なおこれは横移動
防止の一手段であシ、これに限定されるものではない。Therefore, in such a case, protrusions 16 with irregular lengths are formed on the bottom surface of the bottom tank 9, and the protrusions 16 are formed by the loads of the jacket body 13 and the movable tank 1.
... shall be inserted into the seabed. Note that this is just one means of preventing lateral movement, and is not limited to this.
また、可動タンク１のタンク４内には海水が収納されて
いるが、いわゆる油水置換作業を行なうことにより、前
記タンク４を貯油タンクとして使用出来る。Further, although seawater is stored in the tank 4 of the movable tank 1, the tank 4 can be used as an oil storage tank by performing a so-called oil/water replacement operation.
またボトムタンク９は中実、中空を問わないが、中空の
ボトムタンク９″′Ｃあれば、貯油タンクとして使用で
きる。Further, the bottom tank 9 may be solid or hollow, but if the bottom tank 9''C is hollow, it can be used as an oil storage tank.
なお、本発明による構築方法であれば、石油主意用海洋
構造物を再利用することができる。その再利用方法につ
いて述べると、可動タンクＩｏ原油を除き、海水を注入
する。その後この海水を除去すると、可動タンク１は上
方に浮力によって摺動するので、上ジャケット５の仮止
め位置に再仮止めできる。その後可動タンク１のタンク
４内の海水をさらに抜けば、可−動タンク１の浮力によ
りジャケット体１３を浮上させることができる。そして
ジャケット体１３がその浮上した状態で曳船１４によシ
再び次の設置位置まで移動し、前述した手順に従がって
海洋中に設置すればよい。In addition, with the construction method according to the present invention, an oil-based offshore structure can be reused. Regarding its reuse method, the crude oil in the mobile tank Io is removed and seawater is injected into it. After that, when this seawater is removed, the movable tank 1 slides upward due to buoyancy, so that it can be temporarily fixed again to the temporarily fixed position of the upper jacket 5. After that, if the seawater in the tank 4 of the movable tank 1 is further drained, the jacket body 13 can be floated due to the buoyancy of the movable tank 1. Then, the jacket body 13 in its floating state is moved again to the next installation position by the tugboat 14 and installed in the ocean according to the procedure described above.
なお、可動タンク１を沈めてボトムタンク９上に載置し
、重錘として使用し、海洋構造物として設置したジャケ
ット体１３が地震勢に遭遇することがある。よってこの
ジャケット体１３に免震効 □果をも九せるべく可動
タンク１の支持枠２とジャケット体１３０レグ１５との
間に各種の緩衝材を設けておくのが好ましい。In addition, the jacket body 13 installed as an offshore structure by submerging the movable tank 1 and placing it on the bottom tank 9 and using it as a weight may encounter an earthquake force. Therefore, in order to increase the seismic isolation effect of this jacket body 13, it is preferable to provide various types of cushioning materials between the support frame 2 of the movable tank 1 and the legs 15 of the jacket body 130.
また図示した実施例では可動タンク１に２つのタンク４
，４を設けであるが、可動−ンク１の支持枠２の四方に
タンク４・・を設けても構わない。In addition, in the illustrated embodiment, the movable tank 1 has two tanks 4.
, 4 are provided, however, tanks 4, . . . may be provided on all sides of the support frame 2 of the movable link 1.
かくして本発明は以上の構成よシなシ、本発明による海
洋構造物の構築方法であれば従来の構築方法に比べ次に
述べる効果を奏する。Thus, the present invention has the above-mentioned configuration, and the method for constructing a marine structure according to the present invention has the following effects compared to conventional construction methods.
■ 本発明による海洋構造物は中小規模ドックで建造可
能である。■ The offshore structure according to the present invention can be constructed in small and medium-sized docks.
■ 現地工事が少なくてすむ。■ Less on-site construction required.
■ 特殊な建設機器が不要となる。■ Special construction equipment is not required.
■ 本発明によって構築され九海洋構造物は貯油機能を
有し、陸上基地までの長距離のパイプラインを必要とし
ない。■ The nine offshore structures constructed according to the present invention have an oil storage function and do not require long-distance pipelines to land bases.
値）本発明によって構築された海洋構造物は、再使用が
可能である。Value) Marine structures constructed according to the present invention are reusable.
■ 本発明による海洋構造物の構築方法は工期が値かく
、工程的に安定している。■ The method for constructing marine structures according to the present invention has a short construction period and is stable in terms of process.
第一１図乃至第１０図は本発明による海洋構造物の構築
方法の手順を示す概略図、第１１図（１） 、 （ｂ）
はボトムタンクの底面に形成された央起物の海底への挿
入状態を示す概略図、第１２図は可動タンクを省いた状
態でのジャケット体を示す側面図、第１３図は可動タン
クの移動状態を示すジャケット体の正面図、第１４図は
ジャケット体の横断面図、第１Ｓ図は本発明によって構
築された海洋構造物の使用状態を示す斜視図である。
１・・・可動タンク、２・・・支持枠、３睦０プツケツ
ト、４・働・タンク、
５０・上ジャケット、６・・・デツキ、７・・・生産設
備、８・・・下ジャケット、９・・Φボトムタンク、１
０・・・係留索、１１・・・下ジャケットの上端部、
１２・・・上ジャケットの下端部、
１３０噂・ジャケット体、１４・番・曳船、１５・・・
レグ、１６・・・央起物。
第９図
第５図
第６−図
第１０ Ｐ
ソ
第７図Figures 11 to 10 are schematic diagrams showing the steps of the method for constructing a marine structure according to the present invention, and Figures 11 (1) and (b)
Figure 12 is a schematic diagram showing how the central brace formed on the bottom of the bottom tank is inserted into the seabed, Figure 12 is a side view showing the jacket body without the movable tank, and Figure 13 is the movement of the movable tank. FIG. 14 is a cross-sectional view of the jacket body, and FIG. 1S is a perspective view showing the state in which the marine structure constructed according to the present invention is used. 1...Movable tank, 2...Support frame, 3. 0 pumps, 4. Working tank, 50. Upper jacket, 6. Deck, 7. Production equipment, 8. Lower jacket. 9...Φ bottom tank, 1
0...Mooring rope, 11...Top end of lower jacket, 12...Lower end of upper jacket, 130 Rumor/Jacket body, 14/Tugboat, 15...
Leg, 16... Central event. Figure 9 Figure 5 Figure 6-Figure 10 P So Figure 7
Claims (1)
立設し、かつ前記上ジャケットと同形状をなす下ジャケ
ットにボトムタンクを固定して立設し、 前記上ジャケットと下ジャケットとを水面上で連結する
と共に、この連結されたジャケット体を前記可動タンク
によって水中に浮かせて沖合め設置位置まで曳航し、そ
の後前記可動タンクの浮力を減じて該タンクをジャケッ
ト体の下方に摺動し、ボトムタンク上に重錘として載置
してなることを特徴とする海洋構造物の構築方法。[Scope of Claims] A movable tank that can be slid vertically is temporarily fixed and erected on an upper jacket, and a bottom tank is fixed and erected on a lower jacket having the same shape as the upper jacket, and the upper jacket and the lower jacket on the water surface, and the connected jacket body is floated in the water by the movable tank and towed to an offshore installation position, and then the buoyancy of the movable tank is reduced to move the tank to the jacket body. A method for constructing a marine structure, characterized by sliding downward and placing it as a weight on a bottom tank.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57028604A JPS58146614A (en) | 1982-02-24 | 1982-02-24 | Construction of off-shore structure |
| US06/465,482 US4534678A (en) | 1982-02-24 | 1983-02-10 | Offshore structure and method of constructing same |
| AU11346/83A AU556323B2 (en) | 1982-02-24 | 1983-02-11 | Offshore structure and method of construction |
| NO830569A NO830569L (en) | 1982-02-24 | 1983-02-18 | OFFSHORE CONSTRUCTION AND PROCEDURE IN ITS MANUFACTURING |
| KR1019830000712A KR840003719A (en) | 1982-02-24 | 1983-02-22 | Offshore Structure and Construction Method |
| EP83300949A EP0087321B1 (en) | 1982-02-24 | 1983-02-23 | Offshore structure and method of constructing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57028604A JPS58146614A (en) | 1982-02-24 | 1982-02-24 | Construction of off-shore structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58146614A true JPS58146614A (en) | 1983-09-01 |
Family
ID=12253182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57028604A Pending JPS58146614A (en) | 1982-02-24 | 1982-02-24 | Construction of off-shore structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58146614A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010025625A1 (en) * | 2008-09-05 | 2010-03-11 | Wu Zhirong | A constant specific mass flow replacement process for ballasting seawater and lng or lpg and a multifunction seabase station |
-
1982
- 1982-02-24 JP JP57028604A patent/JPS58146614A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010025625A1 (en) * | 2008-09-05 | 2010-03-11 | Wu Zhirong | A constant specific mass flow replacement process for ballasting seawater and lng or lpg and a multifunction seabase station |
| US8678711B2 (en) | 2008-09-05 | 2014-03-25 | Zhirong Wu | Multifunctional offshore base with liquid displacement system |
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