EP0840690B1 - Offshore-ölproduktionsplattform - Google Patents

Offshore-ölproduktionsplattform Download PDF

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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
Application number
EP96926441A
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English (en)
French (fr)
Other versions
EP0840690A1 (de
Inventor
Pierre-Armand Thomas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technip Energies France SAS
Original Assignee
Technip Geoproduction SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Technip Geoproduction SA filed Critical Technip Geoproduction SA
Publication of EP0840690A1 publication Critical patent/EP0840690A1/de
Application granted granted Critical
Publication of EP0840690B1 publication Critical patent/EP0840690B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Earth Drilling (AREA)
  • Revetment (AREA)
  • Lubricants (AREA)
  • Cleaning Or Clearing Of The Surface Of Open Water (AREA)

Claims (13)

  1. Offshoreabbau-Plattform, insbesondere Offshoreölabbau-Plattform, des Typs, der eigen oberen Rumpf (1) enthält, der sich oberhalb des Meeresspiegels erstreckt und mit einem hohlen unteren Sockel (3), der vollkommen eingetaucht ist, über Verbindungsbeine (2) verbunden ist, die teilweise eingetaucht sind, einen Schwimmbehälter bilden und im wesentlichen vertikal verlaufen, dadurch gekennzeichnet, daß die Beine (2) auf ihrer eingetauchten Höhe wenigstens zwei aufeinanderfolgende Teilstücke (10, 14), ein erstes Teilstück (10) mit Vollwänden, die einen geschlossenen Raum begrenzen und einen Schwimmbehälter bilden, und ein zweites Teilstück (14) mit gelochter Seitenwand, umfassen, wobei der Innenraum des zweiten Teilstücks (14) zum umgebenden Meeresmilieu offen ist, und daß die ersten (10) und zweiten (14) Teilstücke so bemessen sind, daß die Druckkraft (Fp), die auf das erste Teilstück (10) mit Vollwänden ausgeübt wird, im wesentlichen in einem Bereich von Perioden des normalen Seegangs die Beschleunigungskraft (Fa) der Plattform kompensiert.
  2. Plattform nach Anspruch 1, dadurch gekennzeichnet, daß das zweite Teilstück (14) mit durchlochter Seitenwand eine metallische Gitterstruktur (18) ist.
  3. Plattform nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das zweite Teilstück (14) mit durchlochter Seitenwand zwischen dem ersten Teilstück (10) mit Vollwänden und dem Sockel (3) angeordnet ist.
  4. Plattform nach irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das erste Teilstück (10) mit Vollwänden sich wenigstens teilweise direkt unter den Rumpf (1) erstreckt.
  5. Plattform nach irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die ersten und zweiten Teilstücke so bemessen sind, daß die Druckkraft (Fp) und die Beschleunigungskraft (Fa) für zwei Werte der Seegangperiode, die im Periodenbereich des normalen Seegangs liegen, gleich sind.
  6. Plattform nach Anspruch 5, dadurch gekennzeichnet, daß der kleinste Wert der Seegangperiode, für den die Druckkraft (Fp) und die Beschleunigungskraft (Fa) gleich sind, größer als 4 Sekunden ist.
  7. Plattform nach irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die untergetauchte Höhe des zweiten Teilstücks (14) zwischen einem Viertel und drei Vierteln der gesamten untergetauchten Höhe des Beins (2) liegt,
  8. Plattform nach Anspruch 7, dadurch gekennzeichnet, daß die untergetauchte Höhe des zweiten Teilstücks (14) zwischen der im wesentlichen 0,4fachen und der im wesentlichen 0,65fachen untergetauchten Gesamthöhe des Beins (2) liegt.
  9. Plattform nach irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Beine (2) eine zylindrische allgemeine äußere Form besitzen.
  10. Plattform nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Sockel (3) wenigstens einen Durchgang (20) aufweist, der durch diesen im wesentlichen vertikal von einer Seite zur anderen verläuft
  11. Plattform nach irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Sockel (3) mit einem einen Ballast bildenden Fluid, insbesondere Meerwasser, gefüllt ist.
  12. Plattform nach irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Rumpf (1) verschiebbar längs der Beine (1) angebracht ist und daß sie mit Mechanismen (6) für die relative Verschiebung und Verriegelung des Rumpfes (1) in bezug auf die Beine (2) versehen ist.
  13. Plattform nach irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das zweite Teilstück (14) mit durchlochter Seitenwand entsprechend der untergetauchten Höhe der Beine (2) zwischen zwei Teilstücken mit Vollwänden angeordnet ist.
EP96926441A 1995-07-26 1996-07-22 Offshore-ölproduktionsplattform Expired - Lifetime EP0840690B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9509112 1995-07-26
FR9509112A FR2737179B1 (fr) 1995-07-26 1995-07-26 Plate-forme d'exploitation petroliere en mer
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 (de) 1998-05-13
EP0840690B1 true EP0840690B1 (de) 1999-09-22

Family

ID=9481422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96926441A Expired - Lifetime EP0840690B1 (de) 1995-07-26 1996-07-22 Offshore-ölproduktionsplattform

Country Status (10)

Country Link
US (1) US6024040A (de)
EP (1) EP0840690B1 (de)
JP (1) JP3905557B2 (de)
KR (1) KR100442502B1 (de)
BR (1) BR9610018A (de)
ES (1) ES2140883T3 (de)
FR (1) FR2737179B1 (de)
NO (1) NO314717B1 (de)
OA (1) OA10656A (de)
WO (1) WO1997005011A1 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
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
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
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
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

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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

Also Published As

Publication number Publication date
WO1997005011A1 (fr) 1997-02-13
NO980339D0 (no) 1998-01-26
ES2140883T3 (es) 2000-03-01
FR2737179B1 (fr) 1997-10-17
NO314717B1 (no) 2003-05-12
JP3905557B2 (ja) 2007-04-18
FR2737179A1 (fr) 1997-01-31
KR19990035950A (ko) 1999-05-25
EP0840690A1 (de) 1998-05-13
NO980339L (no) 1998-03-26
OA10656A (en) 2002-09-19
KR100442502B1 (ko) 2004-10-08
BR9610018A (pt) 1999-07-06
JPH11509803A (ja) 1999-08-31
US6024040A (en) 2000-02-15

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