EP0441673B1 - Plate-forme pétrolière auto-élévatrice - Google Patents

Plate-forme pétrolière auto-élévatrice Download PDF

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Publication number
EP0441673B1
EP0441673B1 EP91400187A EP91400187A EP0441673B1 EP 0441673 B1 EP0441673 B1 EP 0441673B1 EP 91400187 A EP91400187 A EP 91400187A EP 91400187 A EP91400187 A EP 91400187A EP 0441673 B1 EP0441673 B1 EP 0441673B1
Authority
EP
European Patent Office
Prior art keywords
legs
platform
lifting mechanisms
leg
tanks
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
EP91400187A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0441673A1 (fr
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 Geoproduction SA
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 EP0441673A1 publication Critical patent/EP0441673A1/fr
Application granted granted Critical
Publication of EP0441673B1 publication Critical patent/EP0441673B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0818—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with racks actuated by pinions
    • 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
    • E02B17/021—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 with relative movement between supporting construction and platform
    • 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
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/006—Platforms with supporting legs with lattice style supporting legs
    • 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
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0073—Details of sea bottom engaging footing
    • E02B2017/0082—Spudcans, skirts or extended feet

Definitions

  • the present invention relates to self-elevating oil platforms for drilling and exploitation at sea.
  • Platforms of this type generally have legs resting on the seabed and a hull mounted movable and adjustable in height along the legs.
  • the whole platform is brought into flotation to the drilling or exploitation site, and the legs are lowered until contact with the seabed, then, taking support on the legs, the hull is hoisted to the - above sea level, up to an altitude which puts it out of the reach of the highest waves.
  • the hull can therefore be moved along the legs of the platform by means of lifting mechanisms housed in a support structure well known to specialists under the name of "Jack-house".
  • These lifting mechanisms include output pinions which cooperate with racks mounted on at least part of the length of the legs.
  • These pinions are motorized by a plurality of motors associated with reducers whose reduction ratio is very high.
  • each leg is provided at its lower part with a foot, for example of hexagonal shape, which comes to rest on the seabed.
  • the hull of the platform is provided, in addition to the operating equipment and living quarters, with capacities integrated into said hull and which can be filled with sea water at the time of fitting the legs on the seabed. We thus manage to create an overload which is transmitted to the legs via the lifting mechanisms.
  • EP-A-0252518 also discloses a device for overloading a self-elevating oil platform comprising a hull mounted movable on legs by means of a lifting mechanism, said overload device comprising at least one additional load. applicable on each leg of the platform and formed by removable tanks comprising hooking means on the legs of the platform, said empty tanks being supported by the hull before the legs are placed on the seabed and momentarily hung and directly on each leg when laying said legs on the seabed, then filled.
  • the invention aims to create a device for overloading a platform which makes it possible to comply with safety standards and which, while being of simple construction, avoids applying this overload directly on the lifting mechanisms of the platform. -form.
  • a self-elevating oil platform comprising a hull mounted displaceable by means of lifting mechanisms on legs intended to bear on the seabed, said platform being provided with a device for overloading said legs , comprising removable reservoirs comprising hooking means on the legs of the platform for applying at least one additional load to each leg of said platform, said empty reservoirs being supported by the shell before the legs are placed on the seabed and temporarily and directly attached to each leg at the time of laying said legs on the seabed, then filled to apply said additional load, as known from document EP-A-0025618 cited above, characterized in that the hull is provided with means for applying an overload to said legs by means of lifting mechanisms housed in a load-bearing structure integral with the hull, that said lifting mechanisms comprise a plurality of output pinions cooperating with racks mounted on at least part of the length of the legs, and that the hooking means consist of automatic locking and unlocking means cooperating with said racks, the empty tanks being supported by the carrying structure of the lifting mechanisms before the installation of
  • Each of the vertical legs in this case has a triangular section, and it consists of three uprights 2a, connected together by a trellis 2b of metal beams.
  • the vertical legs 2 can also have a square or circular section.
  • Each leg 2 ends at its lower part with a foot 4, which in this case is hexagonal in shape.
  • the platform is also equipped, at each leg 2, with lifting mechanisms 5 for the shell 1 relative to said legs.
  • These lifting mechanisms 5 make it possible to lower the legs 2 until they come into contact with the seabed 3, then, taking support on the legs, to hoist the hull 1 above the sea, to an altitude which puts it out of range of the highest waves.
  • the uprights 2a of the legs 2 are provided with diametrically opposite racks 6 arranged on a part of the length of the legs 2 and with which are intended to cooperate output pinions 7 of the lifting mechanisms 5. It is possible to provide, for example six pinions outlet 7 for each upright 2a, each equipped with a drive motor 8.
  • the lifting mechanisms 5 are housed in a support structure 9 secured to the shell 1.
  • the hull 1 is provided, in addition to the usual operating equipment and living quarters, with capacities 10 (FIG. 1) integrated into the said hull and which can be filled with seawater by appropriate means, not shown, when the legs 2 were laid on the seabed 3. This resulted in an overload which is transmitted to the legs 2 by the lifting mechanisms 5.
  • capacities 10 FIG. 1
  • This overload is to obtain a stable anchoring of the feet 4, in particular on sites where said legs feet tend to sink due to the instability of certain layers of the basement.
  • the platform is provided, in addition to the integrated capacities 10, with additional loads that can be locked momentarily and directly on each leg 2 of the platform when the said legs are laid on the seabed 3.
  • the additional loads are constituted by at least one removable tank 11 and supported by each carrying structure 9 of the lifting mechanisms 5 of each leg 2.
  • each reservoir 11 is divided into several independent enclosures 11a, 11b and 11c and lockable together by suitable means, not shown.
  • each reservoir 11 can be installed directly by the side of the corresponding leg 2 which avoids having to introduce it through the top of said leg.
  • Each enclosure 11a, 11b and 11c is each provided with filling means 12 constituted for example by a supply valve and draining means 13 constituted for example by a discharge valve.
  • the filling means 12 are connected by an extendable pipe 14 to a pump, not shown, for example supplying seawater.
  • the enclosures 11a, 11b and 11c rest on each support structure 9 by means of studs 15 made of elastic material.
  • each enclosure 11a, 11b and 11c is provided with means 16 (Fig. 3) for automatic attachment to the legs 2 of the platform to apply at least one additional load to each leg 2 of said platform.
  • the means 16 are also automatically unlockable, for example when the force exerted on the pads 15 by the support structure 9 and detected by at least one sensor integrated into one of said pads, exceeds a predetermined threshold.
  • hooking means 16 are formed for example by counter-racks associated with locking and unlocking members again by ratchet wheels.
  • the reservoirs 11 can be constituted by rigid enclosures or by enclosures made of flexible material placed for example in cradle-shaped frames.
  • the reservoirs 11 can be monobloc and in this case comprise a part forming a door allowing mounting directly from the side of the legs.
  • the platform is brought into floatation as far as the drilling or exploitation site (Fig. 4a) and the legs 2 are lowered until contact with the seabed 3.
  • the hull 1 By resting on the legs 2, the hull 1 is hoisted by means of the lifting mechanisms 5 cooperating with the racks 6, up to an altitude which puts it out of reach of the highest waves at the time of installation ( Fig. 4b).
  • the hull 1 is lowered to the previous level which puts it out of reach of the highest waves at the time of installation, the tanks 11 being locked on the legs 2 at a higher altitude (Fig. 4d).
  • the capacities 10 integrated into the hull 1 are filled with sea water by appropriate means.
  • the tanks 11 are also filled with sea water by means of the filling means 12 and the pipes 14.
  • the filling of these tanks 11 results in the application of an overload additional on each leg 2 thus allowing the foot 4 to anchor more deeply and more stably in the seabed 3.
  • the tanks 11 are emptied by the emptying means 13, as well as the integrated capacities 10, and the shell 1 is again raised by means of the lifting mechanisms 5 so that the tanks 11 rest again on the supporting structure 9, after unlocking said reservoirs 11 relative to the legs 2 (Fig. 4e).
  • the hull 1 is then raised to its position which puts it out of the reach of the highest waves that can occur during operation on the site. (Fig. 4f).
  • the overload device while being simple in construction and easy to implement, therefore makes it possible to apply the desired overload to the legs of the platform in order to be able to comply with safety standards and to avoid to pass this overload through the lifting mechanisms of the platform.

Landscapes

  • General Engineering & Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Materials For Medical Uses (AREA)
  • Transmission Devices (AREA)
  • Chairs Characterized By Structure (AREA)
  • Fluid-Damping Devices (AREA)
  • Jib Cranes (AREA)
  • Pallets (AREA)
  • Removal Of Floating Material (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
EP91400187A 1990-02-08 1991-01-28 Plate-forme pétrolière auto-élévatrice Expired - Lifetime EP0441673B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001475A FR2657904B1 (fr) 1990-02-08 1990-02-08 Dispositif de surcharge d'une plate-forme petroliere auto-elevatrice et plate-forme en comportant application.
FR9001475 1990-02-08

Publications (2)

Publication Number Publication Date
EP0441673A1 EP0441673A1 (fr) 1991-08-14
EP0441673B1 true EP0441673B1 (fr) 1995-02-15

Family

ID=9393505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400187A Expired - Lifetime EP0441673B1 (fr) 1990-02-08 1991-01-28 Plate-forme pétrolière auto-élévatrice

Country Status (8)

Country Link
US (1) US5224798A (da)
EP (1) EP0441673B1 (da)
AT (1) ATE118579T1 (da)
DE (1) DE69107313D1 (da)
DK (1) DK0441673T3 (da)
ES (1) ES2071243T3 (da)
FR (1) FR2657904B1 (da)
NO (1) NO910450L (da)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5580189A (en) 1995-12-22 1996-12-03 Searex, Inc. Jack-up rig crane
FR2759400B1 (fr) * 1997-02-07 1999-04-23 Schlumberger Services Petrol Plate-forme de forage petrolier du type "jack-up" ou a piliers elevateurs a cremaillere, a elevation independante pour chaque membrure de chaque pilier
US7258510B2 (en) * 2001-03-29 2007-08-21 Masasuke Kawasaki Systems and methods useful in stabilizing platforms and vessels having platforms and legs
FR2837461B1 (fr) * 2002-03-22 2004-06-18 Technip Coflexip Structure de transport, d'installation et de demantelement d'un pont d'une plate-forme petroliere fixe et procede de mise en oeuvre d'une telle structure
US6705802B2 (en) * 2002-08-16 2004-03-16 Saudi Arabian Oil Company Temporary support for offshore drilling platform
FR2865484B1 (fr) * 2004-01-28 2006-05-19 Technip France Structure de transport, d'installation et de demantelement des elements d'une plate-forme petroliere fixe et procedes de mise en oeuvre d'une telle structure.
US20070204520A1 (en) * 2006-03-01 2007-09-06 Calleja Michael J Self-elevating staging with rack-and-pinion posts
EA022591B1 (ru) * 2008-05-23 2016-01-29 Трансоушен Оффшор Дипвотер Дриллинг Инк. Способ и устройство для улучшения боковой опоры, создаваемой ногами самоподъемной буровой установки
US8052174B2 (en) 2008-09-15 2011-11-08 Denso International America, Inc. Pipe joint design
US8668408B2 (en) * 2011-03-09 2014-03-11 Keppel Offshore & Marine Technology Centre Pte Ltd Skirted foundation for penetrating soft material
US9371625B2 (en) * 2014-06-09 2016-06-21 Offshore Technology Development Pte Ltd Modified spudcan with optimal peripheral skirt for enhanced performance of jackup operations
US9903084B2 (en) * 2015-06-23 2018-02-27 Bennett Offshore, L.L.C. System and method for improving a jack up platform with asymmetric cleats

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044269A (en) * 1957-07-22 1962-07-17 Tourneau Robert G Le Mobile sea platform
US2992812A (en) * 1958-05-01 1961-07-18 De Long Corp Jacking mechanism and controls
US3277653A (en) * 1963-11-26 1966-10-11 Christopher J Foster Offshore platforms and method of installing same
US3797256A (en) * 1972-09-08 1974-03-19 Sharp Inc G Jack-up type offshore platform apparatus
JPS5820326B2 (ja) * 1978-10-27 1983-04-22 日立造船株式会社 ジヤツキ・アツプ式リグの据付け方法およびその装置
US4255069A (en) * 1979-08-01 1981-03-10 The Offshore Company Jack-up platform locking apparatus
NL7906710A (nl) * 1979-09-07 1981-03-10 Rsv Gusto Eng Bv Werkwijze en inrichting voor het door voordrukken verhogen van de stabiliteit van een kunstmatig eiland.
US4505615A (en) * 1982-02-17 1985-03-19 Atlantic Pacific Marine Corporation Method of supporting a shallow water drilling barge
US4482272A (en) * 1982-04-23 1984-11-13 Ateliers Et Chantiers De Bretagne Acb Load transfer and monitoring system for use with jackup barges

Also Published As

Publication number Publication date
ATE118579T1 (de) 1995-03-15
FR2657904A1 (fr) 1991-08-09
US5224798A (en) 1993-07-06
DK0441673T3 (da) 1995-07-24
NO910450D0 (no) 1991-02-06
NO910450L (no) 1991-08-09
EP0441673A1 (fr) 1991-08-14
DE69107313D1 (de) 1995-03-23
FR2657904B1 (fr) 1992-12-31
ES2071243T3 (es) 1995-06-16

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