EP0097069B1 - Procédé d'installation d'une plateforme en mer, superstructure de plateforme pour la mise en oeuvre de ce procédé - Google Patents

Procédé d'installation d'une plateforme en mer, superstructure de plateforme pour la mise en oeuvre de ce procédé Download PDF

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Publication number
EP0097069B1
EP0097069B1 EP83400991A EP83400991A EP0097069B1 EP 0097069 B1 EP0097069 B1 EP 0097069B1 EP 83400991 A EP83400991 A EP 83400991A EP 83400991 A EP83400991 A EP 83400991A EP 0097069 B1 EP0097069 B1 EP 0097069B1
Authority
EP
European Patent Office
Prior art keywords
superstructure
floats
barge
understructure
platform
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
Application number
EP83400991A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0097069A1 (fr
Inventor
Yves Pol Wautelet
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 EP0097069A1 publication Critical patent/EP0097069A1/fr
Application granted granted Critical
Publication of EP0097069B1 publication Critical patent/EP0097069B1/fr
Expired 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
    • E02B17/02—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

Definitions

  • the present invention essentially relates to a method of installing a fixed platform at sea.
  • the object of the present invention is therefore to remedy the above drawbacks in particular by proposing a new method of installing a fixed platform, which method requires minimal work at sea, allows rapid, reliable and safe positioning of the superstructure on the infrastructure of the platform, and therefore remains relatively low overall cost and in any case significantly lower than conventional methods.
  • the essential object of the invention is a method of installing a fixed platform at sea and of the type consisting in flotation carrying a superstructure to the site of installation of the platform, in positioning this superstructure to the right of an infrastructure already resting on the sea bottom, and to lower the superstructure to ensure its placement on the infrastructure and thus erect said platform, characterized in that said superstructure being initially provided with floats temporary, it is transported by barge to the vicinity of the infrastructure, the barge is sunk or submerged to a depth sufficient to allow the buoyancy of the superstructure thanks to the temporary floats, then the superstructure is floated to the right of the infrastructure, then after lowering the superstructure to bring it into contact with the infrastructure and after assembling the two structures together, the fleet is removed temporary ones from below the superstructure.
  • the superstructure conveyed by the barge does not initially comprise the above-mentioned floats, these being substituted for the barge only near the infrastructure.
  • the superstructure is kept in abutment on its piles, the barge is ballasted and the floats are interposed between the barge and the underside of the superstructure.
  • the positioning in the horizontal plane of the superstructure in line with the infrastructure is carried out by hauling on hawsers, chains or the like connecting the infrastructure to the floats and / or to the superstructure .
  • the method of the invention is further characterized in that the positioning of the superstructure on the infrastructure in the vertical direction can be carried out by ballasting of the floats and / or by actuation of jacks integral with the superstructure, and / or by vertical traction on the infrastructure by means of at least one winch and cables for example.
  • the invention also relates to a platform superstructure for the execution of the above method, and with which is associated a barge allowing its transport on sea, characterized in that flotation means constituted by at least two removable floats ensure its maintenance on the sea during its lowering.
  • This superstructure is also characterized by the fact that each float is connected to the super structure via a removable support, for example forming a lattice structure.
  • floats have a parallelepiped shape surmounted by two projecting parts and possibly include stabilizing flaps which can be adjustable.
  • the aforementioned floats are provided with winches, while piles or columns actuated by jacks, as known per se, can be provided on the superstructure to mount it on the infrastructure.
  • a platform superstructure 1 is built on a site and rests on the ground 2 by means of rails 3 for example.
  • the superstructure 1 forms a lattice structure, but could be constituted otherwise, without departing from the scope of the invention.
  • Cylinders 4, of a type known per se and for example eight in number, are integral with the superstructure 1 and are capable of actuating columns or stacks 5 allowing the lowering or lifting of the superstructure 1.
  • the superstructure 1 is raised relative to the ground 2 by means of the jacks 4, so as to allow, in accordance with the invention, the insertion and mounting under said superstructure, of two floats 6 better visible in FIG. 9.
  • floats 6 have, according to a preferred embodiment, a substantially parallelepiped shape and are each surmounted, at their respective ends, by two projecting parts 6a.
  • the parts 6a advantageously give the deck 1 - floats 6 assembly a behavior close to that of a semi-submersible platform, as will be seen below.
  • the floats 6 can be made of any suitable material and, as seen in FIG. 9, can include various accessories such as removable and / or adjustable stabilization flaps 7.
  • the floats 6 are connected to the structure 1 by means of a support 8 preferably forming a lattice structure.
  • These supports 8 are advantageously removable, as are consequently the floats 6 that one can. thus qualify as temporary and removable floating elements.
  • the superstructure 1 on the barge 9 is removed, and said barge is ballasted, submerged or possibly sunk.
  • the superstructure 1 is launched and floats by means of the floats 6, as can be seen in FIG. 4.
  • the superstructure 1 is then towed to the final installation site where an infrastructure 10 has been installed, with eight piers 11 for example, as is clearly shown in FIG. 5 where we see said infrastructure which rests or is fixed to the bottom 12 of the sea 13 by any appropriate means.
  • hawsers, chains or the like 15 connect the floats 6 (or even the superstructure 1) to the infrastructure 10, and more particularly to the four central stacks 11 a of this infrastructure.
  • the superstructure 1 can be positioned precisely in the horizontal plane above the infrastructure 10.
  • the floats 6 which support the superstructure 10 somewhat in the manner of a catamaran, squeeze between the 11 stacks of the infrastructure.
  • the superstructure 1 is thus correctly positioned in the horizontal plane above the in frastructure, it is necessary to remove the piles 5 of the superstructure on the corresponding piles 11 of the infrastructure. To proceed with this removal, the floats 6 can be ballasted as seen in FIG. 5 if we compare it to fig. 4. It should be noted here, that a partial ballasting of these floats can be carried out before the removal of the superstructure 1, which advantageously gives it the behavior of a semi-submersible machine during towing.
  • the platform is practically carried out and is in the position illustrated by lafig. 8. It is necessary to simultaneously actuate the jacks 4 to raise the superstructure 1 to its final level above the sea. During this lifting, the floats 6 advantageously assist the jacks 4, and then the floats 6 as well as the intermediate structure 8 can be removed, it being understood that they can be reusable later.
  • the superstructure 1 conveyed by the transport barge 9 is not initially, that is to say on the manufacturing site, equipped with floats 6 according to the invention.
  • this superstructure 1 is transported alone up to the proximity of the infrastructure 10, in a protected site and in relatively shallow water. It is here that the floats 6 are substituted for the barge 9, in the following manner.
  • the superstructure 1 is held in abutment by its batteries 5 on the bottom 12 of the sea, and this by actuation of the jacks 4.
  • the barge 9 is then ballasted as indicated by the arrow 14, and the floats 6 are interposed between the barge 9 and the underside of superstructure 1.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Revetment (AREA)
  • Earth Drilling (AREA)
EP83400991A 1982-05-25 1983-05-17 Procédé d'installation d'une plateforme en mer, superstructure de plateforme pour la mise en oeuvre de ce procédé Expired EP0097069B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8209036A FR2527666A1 (fr) 1982-05-25 1982-05-25 Procede d'installation d'une plate-forme en mer, superstructure de plate-forme pour la mise en oeuvre de ce procede, et plate-forme ainsi obtenue
FR8209036 1982-05-25

Publications (2)

Publication Number Publication Date
EP0097069A1 EP0097069A1 (fr) 1983-12-28
EP0097069B1 true EP0097069B1 (fr) 1986-01-29

Family

ID=9274290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400991A Expired EP0097069B1 (fr) 1982-05-25 1983-05-17 Procédé d'installation d'une plateforme en mer, superstructure de plateforme pour la mise en oeuvre de ce procédé

Country Status (5)

Country Link
EP (1) EP0097069B1 (OSRAM)
DE (1) DE3361991D1 (OSRAM)
FR (1) FR2527666A1 (OSRAM)
NO (1) NO831823L (OSRAM)
OA (1) OA07440A (OSRAM)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7033115B2 (en) 2000-05-12 2006-04-25 Deepwater Marine Technology L.L.C. Temporary floatation stabilization device and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554780B1 (fr) * 1983-11-14 1986-01-17 Inst Francais Du Petrole Procede pour la fabrication et le prepositionnement en vue de leur arrimage definitif, des lignes d'une plate-forme a lignes tendues

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2657540A (en) * 1948-06-14 1953-11-03 John B Templeton Method of erecting and positioning marine structures
US2598088A (en) * 1949-01-13 1952-05-27 Wilson Harvey Ashton Offshore platform structure and method of erecting same
FR2416306A2 (fr) * 1978-02-06 1979-08-31 Liautaud Jean Plate-forme marine en plusieurs sections, et sa methode de pose
FR2446894A1 (fr) * 1979-01-16 1980-08-14 Doris Dev Richesse Sous Marine Procede de construction de plates-formes marines
FR2476715A2 (fr) * 1979-10-31 1981-08-28 Liautaud Jean Plate-forme marine et sa methode de pose

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7033115B2 (en) 2000-05-12 2006-04-25 Deepwater Marine Technology L.L.C. Temporary floatation stabilization device and method

Also Published As

Publication number Publication date
FR2527666A1 (fr) 1983-12-02
OA07440A (fr) 1984-11-30
EP0097069A1 (fr) 1983-12-28
DE3361991D1 (en) 1986-03-13
FR2527666B1 (OSRAM) 1985-04-19
NO831823L (no) 1983-11-28

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