EP0442771A1 - Verfahren und Vorrichtung zum Bergen des Unterbaus einer Offshore Plattform - Google Patents

Verfahren und Vorrichtung zum Bergen des Unterbaus einer Offshore Plattform Download PDF

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Publication number
EP0442771A1
EP0442771A1 EP91400216A EP91400216A EP0442771A1 EP 0442771 A1 EP0442771 A1 EP 0442771A1 EP 91400216 A EP91400216 A EP 91400216A EP 91400216 A EP91400216 A EP 91400216A EP 0442771 A1 EP0442771 A1 EP 0442771A1
Authority
EP
European Patent Office
Prior art keywords
barge
substructure
floats
bridge
hull
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.)
Withdrawn
Application number
EP91400216A
Other languages
English (en)
French (fr)
Inventor
Jean-Marie D'ettorre
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.)
Saipem SA
Original Assignee
Bouygues Offshore 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 Bouygues Offshore SA filed Critical Bouygues Offshore SA
Publication of EP0442771A1 publication Critical patent/EP0442771A1/de
Withdrawn legal-status Critical Current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
    • B63B35/003—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
    • 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
    • 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
    • E02B2017/0039—Methods for placing the offshore structure
    • E02B2017/0047—Methods for placing the offshore structure using a barge
    • 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
    • E02B2017/0052—Removal or dismantling of offshore structures from their offshore location

Definitions

  • the invention relates to a method and a device for recovering the substructure of a platform at sea.
  • the total number of platforms installed worldwide is estimated at more than 6,000.
  • In-situ dismantling if it can be envisaged for small substructures, is practically not applicable to substructures such as the large North Sea jackets, which may have a section at the base of 100 m by 80 m, a height of 120 to 170 m, and a mass of the order of 30,000 tonnes.
  • the publication US-A-3 347 052 describes a technique for recovering a substructure at sea which consists in fixing, definitively or temporarily, a certain number of floats on the feet of the structure, in judiciously distributed places and ballasting these floats selectively to change the position of the structure from the vertical service position to a horizontal position where the structure is floating and can be towed.
  • the present invention aims to allow the recovery of a sub-structure of generally truncated-pyramidal shape by means of a ballast barge and without requiring ballasting and deballasting operations of the substructure itself.
  • This barge (B), preferably made of prestressed concrete comprises a ballastable bridge 1 surmounted by two lateral structures also ballastable which include cylindrical floats preferably metal 2,2 ′ arranged longitudinally, supported by metal columns 3,3 ′.
  • Ballasting is ensured by any suitable means that can be controlled remotely.
  • any suitable means that can be controlled remotely.
  • the barge is self-propelled or moved by means of a tug.
  • the barge is moved to the floating position, generally horizontal until it is close to the substructure (S).
  • the substructure visible in FIG. 2 is in this example constituted by a tubular frame of general truncated-pyramidal shape whose top (which initially carried a platform, which has been dismantled) emerges from sea level M and whose the base was integral with pillars anchored in the seabed. To separate the substructure from the seabed, these pillars were cut at an appropriate location, for example at 7.
  • This cut is made at the time that seems most desirable, taking into account the circumstances, before or after securing the barge to the substructure, by any appropriate means, for example by pyrotechnics, torches, mechanical cutting.
  • most of the piles are cut before approaching and stowing the barge and ending the separation after stowing the barge on the substructure.
  • the substructure normally has a face F called a reinforced face which usually comprises longitudinal members R reinforced by a strong lattice beaming inside the substructure.
  • a reinforced face usually comprises longitudinal members R reinforced by a strong lattice beaming inside the substructure.
  • the substructure was made horizontally on two launching beams which were plumb with the reinforced members.
  • the barge is ballasted to make it sink into the water and an inclination of the order of 95 to 110 ° so that the bridge of the barge can be applied against the reinforced face of the substructure and the barge and the substructure by any suitable means ( Figures 2 and 3), for example by flanges or hooks operated by jacks.
  • the upper deck 1 of the barge is provided with a network of beams 8 on which are welded at the desired location receiving beams (9) distributed so that the reinforced members of the substructure are applied against the landing beams of the barge deck.
  • the invention is not limited to a particular structure of the ballasting means.

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)
  • Revetment (AREA)
  • Jib Cranes (AREA)
EP91400216A 1990-01-31 1991-01-30 Verfahren und Vorrichtung zum Bergen des Unterbaus einer Offshore Plattform Withdrawn EP0442771A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001127 1990-01-31
FR9001127A FR2657582A1 (fr) 1990-01-31 1990-01-31 Procede et dispositif pour recuperer la sous-structure d'une plate-forme en mer sans avoir a la demonter.

Publications (1)

Publication Number Publication Date
EP0442771A1 true EP0442771A1 (de) 1991-08-21

Family

ID=9393274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400216A Withdrawn EP0442771A1 (de) 1990-01-31 1991-01-30 Verfahren und Vorrichtung zum Bergen des Unterbaus einer Offshore Plattform

Country Status (4)

Country Link
US (1) US5111764A (de)
EP (1) EP0442771A1 (de)
FR (1) FR2657582A1 (de)
NO (1) NO910358L (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO306386B1 (no) * 1996-12-18 1999-11-01 Offshore Shuttle As Transportör for tunge gjenstander til havs
NO306289B1 (no) 1996-12-18 1999-10-18 Offshore Shuttle As FremgangsmÕte og transportör til bruk ved installasjon eller fjerning av et understell for en offshoreplattform
US6540441B1 (en) 1997-08-01 2003-04-01 Marine Shuttle Operations As Transporter for installation or removal of an offshore platform and a method for removal of an offshore platform
AU8564598A (en) * 1997-08-01 1999-02-22 Marine Shuttle Operations As Method and transporter for installation or removal of an offshore platform topsides
AU6109099A (en) * 1998-09-30 2000-04-17 Keith Dixon-Roche Recovery of submerged structures
US6503023B2 (en) * 2000-05-12 2003-01-07 Abb Lummus Global, Inc. Temporary floatation stabilization device and method
NO20010703D0 (no) * 2001-02-09 2001-02-09 Marine Shuttle Operations As Fremgangsmåte og anordning ved fjerning av plattformdeler
NO318063B1 (no) * 2003-10-28 2005-01-24 Delta Lifter Technologies As Fremgangsmate for flytting av offshore-konstruksjon
US9415838B2 (en) * 2014-07-24 2016-08-16 Naviform Consulting & Research Ltd. Exoskeleton ship hull structure
US9266590B1 (en) * 2015-03-04 2016-02-23 Wayne Kenneth Dye Modular floating dry dock
ES2959505T3 (es) * 2015-03-13 2024-02-26 Ge Renewable Tech Wind Bv Procedimiento y dispositivo de manipulación de piezas de turbina eólica

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347052A (en) * 1965-04-26 1967-10-17 Movible Offshore Inc Method of and apparatus for transporting, erecting, and salvaging off-shore structures
US3823564A (en) * 1973-02-27 1974-07-16 Brown & Root Method and apparatus for transporting and launching an offshore tower
US3987637A (en) * 1975-05-06 1976-10-26 Brown & Root, Inc. Method and apparatus for transporting and erecting an offshore tower
US4086777A (en) * 1976-12-13 1978-05-02 Standard Oil Company (Indiana) Apparatus for launching battered leg jackets for offshore platforms
WO1983001235A1 (fr) * 1981-10-12 1983-04-14 Lamy, Jacques, Edouard Dispositif flottant de levage et de transport de charge

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946566A (en) * 1956-08-31 1960-07-26 Charles T Samuelson Subaqueous drilling apparatus
US3859804A (en) * 1973-02-27 1975-01-14 Brown & Root Method and apparatus for transporting and launching an offshore tower

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347052A (en) * 1965-04-26 1967-10-17 Movible Offshore Inc Method of and apparatus for transporting, erecting, and salvaging off-shore structures
US3823564A (en) * 1973-02-27 1974-07-16 Brown & Root Method and apparatus for transporting and launching an offshore tower
US3987637A (en) * 1975-05-06 1976-10-26 Brown & Root, Inc. Method and apparatus for transporting and erecting an offshore tower
US4086777A (en) * 1976-12-13 1978-05-02 Standard Oil Company (Indiana) Apparatus for launching battered leg jackets for offshore platforms
WO1983001235A1 (fr) * 1981-10-12 1983-04-14 Lamy, Jacques, Edouard Dispositif flottant de levage et de transport de charge

Also Published As

Publication number Publication date
NO910358L (no) 1991-08-01
FR2657582A1 (fr) 1991-08-02
NO910358D0 (no) 1991-01-30
US5111764A (en) 1992-05-12

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