EP0840690B1 - Plate-forme d'exploitation petroliere en mer - Google Patents
Plate-forme d'exploitation petroliere en mer Download PDFInfo
- Publication number
- EP0840690B1 EP0840690B1 EP96926441A EP96926441A EP0840690B1 EP 0840690 B1 EP0840690 B1 EP 0840690B1 EP 96926441 A EP96926441 A EP 96926441A EP 96926441 A EP96926441 A EP 96926441A EP 0840690 B1 EP0840690 B1 EP 0840690B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- platform
- platform according
- legs
- submerged
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
- 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
- B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
- B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH
-
- 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
- B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
- B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
- B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
- B63B2001/128—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising underwater connectors between the hulls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
- B63B2039/067—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water effecting motion dampening by means of fixed or movable resistance bodies, e.g. by bilge keels
Definitions
- the present invention relates to a platform operating at sea, including an operating platform oil at sea, kills with a upper hull extending above sea level and connected to a completely hollow lower base submerged by partially submerged connecting legs forming a buoyancy box and extending substantially vertically.
- Platforms of this type are known as name of semi-submersible platforms.
- the lower base is ballasted, for example by filling it with sea water.
- the legs are formed by cylindrical columns with solid walls delimiting on their entire height an enclosed space forming a box of buoyancy for the platform.
- French patent application FR-A-2 713 588 describes a self-elevating platform comprising legs formed over the entire height of a wire mesh. Integrated floats on the legs allow to float the platform. However, they are not intended to reduce movement platform verticals.
- the object of the present invention is to provide a offshore exploitation platform insensitive to swell and the length of the legs linking the upper shell at the lower base is limited.
- the invention relates to a platform at sea, including a platform operating as described in claim 1.
- FIG. 1 there is shown schematically a semi-submersible self-elevating oil platform. It basically has a shell upper 1 extending over the sea when the platform is in operation, and connected by legs 2 to a submerged lower base 3.
- the upper shell has unrepresented technical and residential buildings as well as a wellbore and wellheads 4.
- passages 5 are provided at the through the shell 1 to allow the passage of 2.
- legs 6 lifting mechanisms are arranged around passages 5 and allow the legs 2 and the base 3 and hoist the hull 1 above the surface of water up to an altitude that puts it out of range of the highest waves.
- Mechanisms 6 are by example of pinion and rack mechanisms, racks extending over the entire height of the legs 2. These mechanisms 6 also include means for locking the legs 2 relative to the shell 1 so to ensure a rigid connection of the legs on the hull.
- the legs 2 are for example four in number and have a general external cylindrical shape. In the embodiment shown in Figure 1, they have a square section, but they can also have a circular or triangular section.
- a first upper section 10 is formed by a tube with solid wall closed at its lower end by a bottom 12. This first section thus delimits an enclosed space isolated from the surrounding marine environment and forms a box of buoyancy for the platform.
- the upper part of this first stretch extends above sea level on either side of the hull 1.
- the lower part of this extends immediately below the hull 1 and is partially submerged.
- the first section is extended by a second section 14 with perforated side wall, the interior of this second section being open to the surrounding marine environment.
- This second section is thus interposed between the first section 10 and the base 3 and is formed for example by a metallic lattice structure.
- This structure has four 16 metal posts connected together by a lattice 18 of metal tubes.
- the second section is welded at its end higher than the lower end of section 10 and at its lower end to the base 3.
- the submerged height Zt of first section 10 with a solid wall represents substantially one third of the total submerged height Zm of the legs 2. So the second lattice section is totally immersed and extends in the embodiment shown over substantially two-thirds of the total submerged height legs 2. Generally speaking, the submerged height of the second section with openwork side wall is included between a quarter and three quarters of the total height submerged legs 2.
- the base 3 is hollow and has a general shape square, rectangular or triangular. She is full seawater and thus forms a ballast for the entire platform. It can also include tanks incorporated therein in which are stored hydrocarbons. In addition, a passage central 20 passes right through the base 3. This passage reduces the resistant surface offered to water during vertical movements of the platform. he can also allow circulation of drilling tools.
- the platform floats thanks to the submerged part of the first sections 10 with a solid wall. These sections are subjected to a pressure force denoted F p exerted on their bottom 12. The pressure force F p depends on the submerged height Zt of the first section 10.
- F p A ⁇ e ⁇ Zt f (t) or :
- a ⁇ is the area of the flotation surface, i.e. the area of the bottoms 12, ⁇ is the wave number of the swell and f (t) is the rise in the level of the surface free from the sea as a function of time.
- F a an acceleration force denoted F a due mainly to the movements of the water and in particular to their effects on the base 3.
- F a an acceleration force denoted F a due mainly to the movements of the water and in particular to their effects on the base 3.
- the added mass is a fictitious mass taking into account the action of the sea water surrounding the base on the platform during the movements of the latter.
- the two forces F a and F p applied to the platform are in phase opposition. Under these conditions, it is understandable that it is possible to size the first and second sections so that the submerged height Zt of the section 10 is such that the pressure force F p exerted on this first section substantially compensates over a range of periods. usual swell the acceleration force F a of the platform. In addition, the dimensioning can be such that these two forces are equal for two values of swell period included in the range of usual swell periods.
- the submerged height Zt of the first full-wall section is determined by solving the equation reflecting the equality of the forces F a and F p applied to the platform.
- Figure 2 is shown the function of transfer of a state-of-the-art platform, that is to say with legs formed of a single section with a solid wall extending from the base 3 to the hull 1, as a function of the swell period T expressed in seconds.
- the heave transfer function is the relationship between the amplitude of the heaving movement of the platform and the amplitude of a swell of one meter, the heaving being a quantity representative of the movements vertical ascending and descending of the platform under the effect of the swell.
- FIG. 3 are shown the evolution of the pressure force F p and the evolution of the acceleration force F a as a function of the swell period T expressed in seconds for a platform of the state of the technical.
- the amplitudes of the forces F a and F p for a period considered to be less than 28 seconds are very large.
- the differences between the values of the forces F a and F p are large.
- the platform is subjected mainly to the acceleration force F a , from which there results the significant heaving translated on the curve of FIG. 2.
- the values of F a and F p are substantially equal, which corresponds to a substantially zero heaving in this figure.
- the transfer function is represented in FIG. 4 while the forces F a and F p are represented in FIG. 5.
- the curve is canceled for two different periods T (15.5 seconds and 23.5 seconds) and not only a value as in the case of known platforms. These two cancellation values result from the two points of intersection of the curves representing the forces of acceleration F a and pressure F p .
- the curves shown here were obtained with a platform whose submerged height Zt of the first section 10 with solid walls is equal to 50 m and whose total submerged length Zm of the legs is equal to 140 m.
- the volume of the base is equal to 33,000 m 3
- the area of the floating surface (sum of the areas of the bottom 12) is equal to 841 m 2 .
- the added mass of the platform is equal to 194,750 tonnes.
- the lattice sections 14 are arranged between two sections with solid walls according to the height submerged legs.
- leg length is independent of the depth of the place of operation.
- the good stability of the platform authorizes the installation of well heads on the hull.
Description
- le second tronçon à paroi latérale ajourée est une structure métallique en treillis,
- le second tronçon à paroi latérale ajourée est disposé entre le premier tronçon à parois pleines et l'embase,
- le premier tronçon à parois pleines s'étend au moins partiellement immédiatement au-dessous de ladite coque,
- les premier et second tronçons sont dimensionnés de telle sorte que la force de pression s'exerçant sur le premier tronçon à parois pleines compense sensiblement sur une plage de périodes de houle usuelle la force d'accélération de la plate-forme,
- les premier et second tronçons sont dimensionnés de telle sorte que la force de pression et la force d'accélération sont égales pour deux valeurs de période de houle comprises dans la plage de périodes de houle usuelle,
- la valeur de période de houle la plus petite pour laquelle la force de pression et la force d'accélération sont égales est supérieure à 4 secondes,
- la hauteur immergée du second tronçon est comprise entre le quart et les trois quarts de la hauteur totale immergée de la jambe,
- la hauteur immergée du second tronçon est comprise entre sensiblement 0,4 et sensiblement 0,65 fois la hauteur totale immergée de la jambe,
- les jambes ont une forme générale extérieure cylindrique,
- l'embase comporte au moins un passage traversant celle-ci sensiblement verticalement de part en part,
- l'embase est emplie d'un fluide formant lest, notamment de l'eau de mer,
- la coque est montée déplaçable le long des jambes et il est prévu des mécanismes de déplacement relatif et de verrouillage de la coque par rapport aux jambes,
- ledit second tronçon à paroi latérale ajourée est disposé entre deux tronçons à parois pleines suivant la hauteur immergée des jambes.
- la figure 1 est une vue schématique en élévation d'une plate-forme pétrolière conforme à l'invention;
- la figure 2 est un graphique représentant la fonction de transfert d'une plate-forme de l'état de la technique en fonction de la période de la houle ;
- la figure 3 est un graphique représentant l'évolution des forces de pression et d'accélération s'exerçant sur une plate-forme de l'état de la technique en fonction de la période de la houle ; et
- les figures 4 et 5 sont des graphiques analogues à ceux des figures 2 et 3 pour une plate-forme selon l'invention.
Aω est l'aire de la surface de flottaison, c'est-à-dire l'aire des fonds 12, β est le nombre d'onde de la houle et f(t) est l'élévation du niveau de la surface libre de la mer en fonction du temps.
k1 est une constante pour une période de houle donnée et B est la somme de la masse de l'embase 3 emplie d'eau et de la masse ajoutée. La masse ajoutée est une masse fictive prenant en compte l'action de l'eau de mer entourant l'embase sur la plate-forme lors des mouvements de celle-ci.
Claims (13)
- Plate-forme d'exploitation en mer, notamment plate-forme d'exploitation pétrolière en mer, du type comportant une coque supérieure (1) s'étendant au-dessus du niveau de la mer et reliée à une embase inférieure (3) creuse totalement immergée par des jambes de liaison (2) partiellement immergées formant caisson de flottabilité et s'étendant sensiblement verticalement, caractérisée en ce que les jambes (2) comportent sur leur hauteur immergée au moins deux tronçons successifs (10, 14), un premier tronçon (10) à parois pleines délimitant un espace clos et formant un caisson de flottabilité et un second tronçon (14) à paroi latérale ajourée, l'espace intérieur de ce second tronçon (14) étant ouvert sur le milieu marin environnant et en ce que les premier (10) et second (14) tronçons sont dimensionnés de telle sorte que la force de pression (Fp) s'exerçant sur le premier tronçon (10) à parois pleines compense sensiblement sur une plage de périodes de houle usuelle, la force d'accélération (Fa) de la plate-forme.
- Plate-forme selon la revendication 1, caractérisée en ce que le second tronçon (14) à paroi latérale ajourée est une structure métallique en treillis (18).
- Plate-forme selon la revendication 1 ou 2, caractérisée en ce que le second tronçon (14) à paroi latérale ajourée est disposé entre le premier tronçon (10) à parois pleines et l'embase (3).
- Plate-forme selon l'une quelconque des revendications précédentes, caractérisée en ce que le premier tronçon (10) à parois pleines s'étend au moins partiellement immédiatement au-dessous de ladite coque (1).
- Plate-forme selon l'une quelconque des revendications précédentes, caractérisée en ce que les premier et second tronçons sont dimensionnés de telle sorte que la force de pression (Fp) et la force d'accélération (Fa) sont égales pour deux valeurs de période de houle comprises dans la plage de périodes de houle usuelle.
- Plate-forme selon la revendication 5, caractérisée en ce que la valeur de période de houle la plus petite pour laquelle la force de pression (Fp) et la force d'accélération (Fa) sont égales et supérieures à 4 secondes.
- Plate-forme selon l'une quelconque des revendications précédentes, caractérisée en ce que la hauteur immergée du second tronçon (14) est comprise entre le quart et les trois quarts de la hauteur totale immergée de la jambe (2).
- Plate-forme selon la revendication 7, caractérisée en ce que la hauteur immergée du second tronçon (14) est comprise entre sensiblement 0,4 et sensiblement 0,65 fois la hauteur totale immergée de la jambe (2).
- Plate-forme selon l'une quelconque des revendications précédentes, caractérisée en ce que les jambes (2) ont une forme générale extérieure cylindrique.
- Plate-forme selon l'une quelconque des revendications précédentes, caractérisée en ce que l'embase (3) comporte au moins un passage (20) traversant celle-ci sensiblement verticalement de part en part.
- Plate-forme selon l'une quelconque des revendications précédentes, caractérisée en ce que l'embase (3) est emplie d'un fluide formant lest, notamment de l'eau de mer.
- Plate-forme selon l'une quelconque des revendications précédentes, caractérisée en ce que la coque (1) est montée déplaçable le long des jambes (2) et en ce qu'il est prévu des mécanismes (6) de déplacement et de verrouillage relatif de la coque (1) par rapport aux jambes (2).
- Plate-forme selon l'une quelconque des revendications précédentes, caractérisée en ce que ledit second tronçon (14) à paroi latérale ajourée est disposé entre deux tronçons à parois pleines suivant la hauteur immergée des jambes (2).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9509112A FR2737179B1 (fr) | 1995-07-26 | 1995-07-26 | Plate-forme d'exploitation petroliere en mer |
FR9509112 | 1995-07-26 | ||
PCT/FR1996/001151 WO1997005011A1 (fr) | 1995-07-26 | 1996-07-22 | Plate-forme d'exploitation petroliere en mer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0840690A1 EP0840690A1 (fr) | 1998-05-13 |
EP0840690B1 true EP0840690B1 (fr) | 1999-09-22 |
Family
ID=9481422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96926441A Expired - Lifetime EP0840690B1 (fr) | 1995-07-26 | 1996-07-22 | Plate-forme d'exploitation petroliere en mer |
Country Status (10)
Country | Link |
---|---|
US (1) | US6024040A (fr) |
EP (1) | EP0840690B1 (fr) |
JP (1) | JP3905557B2 (fr) |
KR (1) | KR100442502B1 (fr) |
BR (1) | BR9610018A (fr) |
ES (1) | ES2140883T3 (fr) |
FR (1) | FR2737179B1 (fr) |
NO (1) | NO314717B1 (fr) |
OA (1) | OA10656A (fr) |
WO (1) | WO1997005011A1 (fr) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1010884C2 (nl) * | 1998-12-23 | 2000-06-26 | Hans Van Der Poel | Werkschip. |
US6524032B2 (en) | 2000-10-10 | 2003-02-25 | Cso Aker Maritime, Inc. | High capacity nonconcentric structural connectors and method of use |
US6652192B1 (en) | 2000-10-10 | 2003-11-25 | Cso Aker Maritime, Inc. | Heave suppressed offshore drilling and production platform and method of installation |
US6666624B2 (en) | 2001-08-07 | 2003-12-23 | Union Oil Company Of California | Floating, modular deepwater platform and method of deployment |
US6701861B2 (en) | 2002-05-03 | 2004-03-09 | Friede & Goldman, Ltd. | Semi-submersible floating production facility |
US6761124B1 (en) * | 2002-09-28 | 2004-07-13 | Nagan Srinivasan | Column-stabilized floating structures with truss pontoons |
US6718901B1 (en) * | 2002-11-12 | 2004-04-13 | Technip France | Offshore deployment of extendable draft platforms |
US6942427B1 (en) | 2003-05-03 | 2005-09-13 | Nagan Srinivasan | Column-stabilized floating structure with telescopic keel tank for offshore applications and method of installation |
US7037044B2 (en) * | 2003-10-15 | 2006-05-02 | Technip France | Deck-to-column connection for extendable draft platform |
US7467912B2 (en) * | 2004-09-30 | 2008-12-23 | Technip France | Extendable draft platform with buoyancy column strakes |
US7854570B2 (en) * | 2008-05-08 | 2010-12-21 | Seahorse Equipment Corporation | Pontoonless tension leg platform |
FR2934635B1 (fr) | 2008-07-29 | 2010-08-13 | Technip France | Installation de conduite montante flexible de transport d'hydrocarbures pour grande profondeur |
US9032896B2 (en) | 2010-06-09 | 2015-05-19 | China National Offshore Oil Corporation | Grouting and welding combined connection joint applied to a deepwater floating type platform and an offshore installation method thereof |
CN101857072B (zh) * | 2010-06-09 | 2012-09-26 | 中国海洋石油总公司 | 无条件稳性整装型深吃水浮式采油平台及其海上安装方法 |
US8757081B2 (en) | 2010-11-09 | 2014-06-24 | Technip France | Semi-submersible floating structure for vortex-induced motion performance |
US8707882B2 (en) | 2011-07-01 | 2014-04-29 | Seahorse Equipment Corp | Offshore platform with outset columns |
US8757082B2 (en) | 2011-07-01 | 2014-06-24 | Seahorse Equipment Corp | Offshore platform with outset columns |
KR101358302B1 (ko) * | 2012-03-22 | 2014-02-05 | 삼성중공업 주식회사 | 반잠수식 해상구조물 |
KR101313809B1 (ko) * | 2012-05-04 | 2013-09-30 | 삼성중공업 주식회사 | 잭업 플랫폼 |
KR101313204B1 (ko) * | 2012-05-08 | 2013-09-30 | 삼성중공업 주식회사 | 잭업 플랫폼 |
CN108262864B (zh) * | 2017-12-22 | 2020-09-01 | 中铁大桥局集团第四工程有限公司 | 水下钻孔定位装置和定位方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO823489L (no) * | 1982-10-20 | 1984-04-24 | Kvaerner Eng | Flytende offshore-plattform. |
US4864958A (en) * | 1987-09-25 | 1989-09-12 | Belinsky Sidney I | Swap type floating platforms |
US4784529A (en) * | 1987-10-06 | 1988-11-15 | Conoco Inc. | Mooring apparatus and method of installation for deep water tension leg platform |
NO882421L (no) * | 1988-06-02 | 1989-12-04 | Per Herbert Kristensen | Flytekonstruksjon. |
FR2713588B1 (fr) * | 1993-12-09 | 1996-03-01 | Technip Geoproduction | Plate-forme auto-élévatrice d'exploitation pétrolière en grande profondeur. |
US5588369A (en) * | 1994-05-12 | 1996-12-31 | Zedd Technologies Inc. | Passive stabilization platform |
-
1995
- 1995-07-26 FR FR9509112A patent/FR2737179B1/fr not_active Expired - Fee Related
-
1996
- 1996-07-22 ES ES96926441T patent/ES2140883T3/es not_active Expired - Lifetime
- 1996-07-22 BR BR9610018A patent/BR9610018A/pt not_active IP Right Cessation
- 1996-07-22 JP JP50727697A patent/JP3905557B2/ja not_active Expired - Fee Related
- 1996-07-22 KR KR10-1998-0700611A patent/KR100442502B1/ko not_active IP Right Cessation
- 1996-07-22 WO PCT/FR1996/001151 patent/WO1997005011A1/fr active IP Right Grant
- 1996-07-22 US US09/000,470 patent/US6024040A/en not_active Expired - Lifetime
- 1996-07-22 EP EP96926441A patent/EP0840690B1/fr not_active Expired - Lifetime
-
1998
- 1998-01-23 OA OA9800010A patent/OA10656A/fr unknown
- 1998-01-26 NO NO19980339A patent/NO314717B1/no not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NO980339D0 (no) | 1998-01-26 |
KR100442502B1 (ko) | 2004-10-08 |
NO314717B1 (no) | 2003-05-12 |
BR9610018A (pt) | 1999-07-06 |
NO980339L (no) | 1998-03-26 |
OA10656A (en) | 2002-09-19 |
FR2737179A1 (fr) | 1997-01-31 |
JPH11509803A (ja) | 1999-08-31 |
ES2140883T3 (es) | 2000-03-01 |
FR2737179B1 (fr) | 1997-10-17 |
WO1997005011A1 (fr) | 1997-02-13 |
KR19990035950A (ko) | 1999-05-25 |
JP3905557B2 (ja) | 2007-04-18 |
EP0840690A1 (fr) | 1998-05-13 |
US6024040A (en) | 2000-02-15 |
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