EP0096650B1 - Colonne de support pour une plate-forme off-shore et son procédé de construction - Google Patents

Colonne de support pour une plate-forme off-shore et son procédé de construction Download PDF

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Publication number
EP0096650B1
EP0096650B1 EP83710015A EP83710015A EP0096650B1 EP 0096650 B1 EP0096650 B1 EP 0096650B1 EP 83710015 A EP83710015 A EP 83710015A EP 83710015 A EP83710015 A EP 83710015A EP 0096650 B1 EP0096650 B1 EP 0096650B1
Authority
EP
European Patent Office
Prior art keywords
supporting column
concrete
casing
column
concrete column
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
EP83710015A
Other languages
German (de)
English (en)
Other versions
EP0096650A1 (fr
Inventor
Günter Dipl.-Ing. Sander
Helmut Dr.-Ing. Lausberg
Heinz Link
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.)
MAN Gutehoffnungshutte GmbH
Original Assignee
MAN Gutehoffnungshutte GmbH
MAN Maschinenfabrik Augsburg Nuernberg AG
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 MAN Gutehoffnungshutte GmbH, MAN Maschinenfabrik Augsburg Nuernberg AG filed Critical MAN Gutehoffnungshutte GmbH
Publication of EP0096650A1 publication Critical patent/EP0096650A1/fr
Application granted granted Critical
Publication of EP0096650B1 publication Critical patent/EP0096650B1/fr
Expired 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
    • B63B35/4406—Articulated towers, i.e. substantially floating structures comprising a slender tower-like hull anchored relative to the marine bed by means of a single articulation, e.g. using an articulated bearing
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B63B2021/501—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of articulated towers, i.e. slender substantially vertically arranged structures articulated near the sea bed
    • 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
    • E02B2017/0091—Offshore structures for wind turbines
    • 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
    • E02B2017/0095—Connections of subsea risers, piping or wiring with the offshore structure

Definitions

  • the invention relates to a support column for a surface platform, in particular for the extraction of oil or natural gas in deep water, consisting of a tubular jacket welded together watertight from sheet steel parts and an annular stiffener arranged in the interior of the jacket.
  • the invention relates to a method for erecting such a support column from a floating platform.
  • a support column of this type is e.g. B. from DE-GM 76 29 303 known. It is used to directly connect a surface platform rigidly to a foundation anchored on the seabed and to support the weight of the platform on the foundation.
  • the support column is generally designed with a circular cylindrical cross section and an annular stiffening arranged on the inside.
  • the support column must also be able to withstand extremely high axial bending moments. Although you can reduce these bending moments in part by articulately connecting the support column to the foundation, remarkably high bending moments remain, especially at higher water depths, which must be taken into account in the structural design and dimensioning of the support column.
  • Support columns made of sheet steel of the type mentioned at the outset with a waterproof welded sheet steel jacket do not have these disadvantages.
  • the jacket in order to remain within the framework of workable sheet thicknesses, the jacket must be stiffened by sufficiently dimensioned steel stiffeners, which give it the necessary buckling and buckling stability against the external water pressure and axial compressive stresses.
  • the production and the welding of the steel strips requires a lot of work and costs.
  • the bracing causes undesirable stress concentrations in the steel sheet cylinder as a result of the changing wall rigidity.
  • the object of the invention is to provide a sufficiently deformation-resistant support column of the type mentioned at the beginning with simple and inexpensive means.
  • bracing consists of a concrete column extending over the length of the support column, which absorbs the compressive forces in the axial direction and is not positively connected to the jacket in the axial direction.
  • the sheet steel jacket essentially only has to absorb tensile stresses in the axial direction and circumferential direction, while the annular reinforcement made of concrete, which extends uniformly over the height of the support column, both the radial reinforcement of the ring cross section and the transmission and absorption of the axially directed compressive forces, such as they also occur in the case of axial bending moments on the inside of the bend.
  • a friction-reducing and / or elastically flexible layer is preferably even arranged between the concrete column and the inner surface of the casing, e.g. B. a smear layer of a flowable, preferably viscous material, such as. B. Bitumen. It is also advantageous if, by grinding the weld seams, the inside surface of the jacket is as smooth as possible free of irregularities.
  • the concrete pillar is advantageously composed of individual ring elements arranged one above the other, it being advantageous if these ring elements are butted one above the other and without an absorbing connection.
  • Elastic intermediate layers can preferably be arranged between the ring elements.
  • the ring elements can be installed as prefabricated parts or as in-situ concrete using an internal formwork. Each ring element can be composed of individual segments in the circumferential direction.
  • the concrete rings mainly absorb only part of the external water pressure. They also act as a homogeneous stiffening of the steel sheet jacket and prevent its bulging in this property. As a result, the sheet steel jacket can be made relatively thin-walled. Due to the elimination of steel bracing, the costs for the production of the support column according to the invention are lower than those of a support column made of steel.
  • the concrete column consisting of concrete rings can have different wall thicknesses in sections, whereby the weight and center of gravity of the support column can be influenced in a simple manner.
  • the steel sheet jacket and the inner concrete column are conical in one or more vertical sections of the support column. This bridges support column sections of different diameters.
  • the stability of the articulated support column requires the lowest possible center of gravity. This can be achieved according to the invention in a particularly cost-effective manner if the support column closed at the bottom is ballasted, e.g. B. with a liquid which has at least the specific weight of the water. With regard to a liquid with a higher specific weight than water, for example, a clay suspension should be considered.
  • the support column according to the invention for an overwater platform can be produced either vertically in sufficiently deep water or on land or in a floating dock in a horizontal position.
  • the vertical erection of the support column appears to be particularly advantageous. It takes place from a floating platform and through it by assembling individual shots into a support column in the lowering process.
  • the support column is lowered by increasing the liquid ballast in the support column section closed at the bottom in time with the progressive extension of the support column.
  • the individual shots are always grown at the same distance from the platform surface.
  • a steel sheet jacket finish is welded watertight to the already completed column part.
  • Sheet steel jacket embedded or inserted as in-situ concrete
  • the support column can also, as is known per se in the case of such columns, be erected from individual shots by assembly on land or in a dock. It is advantageous if the assembly sequence is carried out simultaneously on both sides from a middle steel sheet jacket section. This saves time.
  • the individual sheet steel jacket sections are braced with concrete rings.
  • the petroleum transfer station shown in Fig. 1 has a water platform 1, the z. B. is designed as a helicopter station 2 and has a boom 3 for the oil transfer to a (not shown) tanker.
  • the above-water platform 1 is connected via the support column 4 to a foundation 6, which is located on the sea floor.
  • the connection between the support column 4 and the foundation 6 takes place via a joint, e.g. a known ball joint 7.
  • a petroleum riser line 5 leads to the boom 3 via a pump station (not shown). Furthermore, within the support column 4 there is a ladder (not shown) or an elevator for inspection and maintenance work.
  • the support column 4 consists, as can be seen from FIGS. 2 to 7, of a steel sheet jacket 8 composed of watertight welded shots, which has a circular cross-section and, for example. (ISe for a 150 m high support column, a sheet thickness of 3 to 4 cm.
  • the thickness of the individual concrete rings can be between 40 and 60 cm for the above-mentioned height of the support column.
  • a lubricating layer 10 is present between the inner wall of the steel sheet jacket 8 and the outer wall of the concrete column 9, which expediently z. B. is applied in the form of bitumen to the inner wall of the steel sheet jacket. This layer allows a free longitudinal expansion of the casing 8 and the concrete column 9, which consist of different materials.
  • the concrete rings of the concrete column 9 can additionally be reinforced. They can be used in the form of finished parts as closed rings or as ring segments. It is also possible to manufacture the concrete rings using appropriate formwork with in-situ concrete.
  • Fig. 4 shows a support column section with concrete rings 9 of different wall thickness. This makes it easy to influence the weight and center of gravity of the support column.
  • the sheet steel jacket 8 absorbs the bending tensile stresses practically only.
  • the joints between the butt-mounted concrete rings 9 open on the tension side.
  • the axial stresses transmitted into the concrete on the pressure side can be reduced by elastic inserts 11 placed between the concrete rings.
  • a relatively small column diameter will be chosen for the support column 4, in order to offer the smallest possible surface area for the wave forces, while a larger column diameter is necessary in greater water depth to absorb the bending moment.
  • 6 shows the transition area between the support column section of smaller column diameter to the section of larger diameter, which is bridged by a section 12 with a conical outer surface.
  • FIG. 7 shows the section of the support column which brings the center of gravity to a position as deep as possible with a solid ballast body 13 and within the cavity of the support column with a ballast liquid 14.
  • FIG. 8 The erection of the support column 4 in a vertical manufacturing method on the sea or better in a deep protected bay is shown in FIG. 8. From a floating platform 16 equipped with floating bodies 15, the manufacture of the column 4 takes place by widening in sections by means of a lifting device 17 upwards. Liquid ballasting 14 ensures that the construction of the individual shots 18 with the height h can always take place at the same distance d from the platform surface 19.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Ocean & Marine Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Revetment (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Claims (14)

1.- Colonne porteuse (4) pour une plateforme émergeante (1), notament pour l'extraction de pétrole brut ou de gaz naturel, colonne constituée d'une envelopps (8) en pièces de tôle d'acier assemblée par soudure de façon étanche à l'eau et d'un renforcement (9) de forme annulaire disposé à l'intérieur de l'enveloppe, colonne porteuse caractérisée en ce que le renforcement est constitué par une colonne de béton (9) s'étendant sur la longeur de la colonne porteuse et absorbant les efforts de compression en direction axiale, cette colonne de béton n'étant pas bloquée en direction axiale par rapport à l'enveloppe.
2.- Colonne porteuse selon la revendication 1, caractérisée en ce que la colonne de béton (9) est composés d'éléments annulaires individuels disposés les uns au-dessus des autres.
3.- Colonne porteuse selon la revendication 2, caractérisée en ce que les éléments annulaires de la colonne de béton (9) sont placés les uns au-dessus des autrss bout à bout et sans liaison transmettant des efforts de traction.
4.- Colonne porteuse selon une dss revendications 1 à 3, caractérisée en ce qu'une couche (10), atténuant le frottement et/ou élastiquement souple, est disposée entre la colonne de béton (9) et la face interne de l'enveloppe (8).
5.- Colonne porteuse selon la revendication 4, caractérisée en ce que la couche (10) constitue une couche lubréfiante en un matériau susceptible de fluer, notament un matériau visqueux.
6.- Colonne porteuse selon une des revendicatiore 1 à 5, caractérisée en ce que la face interne de l'enveloppe (8) est lissée notament sur les cordons de soudure.
7.- Colonne porteuse selon la revendication 2 ou 3, caractérisée en ce que des couches intermédiaires élastiques (1 1) sont disposées entre les éléments annulaires de la colonne de béton (9).
8.- Colonne porteuse selon la revendication 2, caractérisée en ce que chaque élément annulaire de la colonne de béton (9) est composé en direction périphérique de plusieurs segments annulaires.
9.- Colonne porteuse selon une des revendicatiore 1 à 8, caractérisée en ce que la colonne de béton (9) a une épaisseur de paroi inégale sur la hauteur de la colonne porteuse (4).
10.- Colonne porteuse selon une des revendications 1 à 9, caractérisée en ce que l'enveloppe (8) et la colonne de béton (9) ont une forme conique sur la hauteur de un ou plusieurs tronçons de la colorne porteuse (4).
11.- Colonne porteuse selon une des revendicatiore 1 à 10, caractérisée en ce que cette colonne porteuse comporte dans sa partie inférieure un remplissage avec du lest (13, 14).
12.- Colonne porteuse selon la revendication 11, caractérisée en ce que le remplissage avec du lest est constitué au moins partiellement par un liquide de poids spécifique plus élevé que celui de l'eau.
13.- Procédé pour l'érection d'une colonne porteuse selon une des revendications 1 à 1 2, procédé caractérisé en ce qu' à partir d'une plateforme flottante, l'enveloppe (8) est assemblée par empilage et assemblage par soudure de tronçons individuels préfabriqués, et qu'après la mise en placé de chaque tronçon, l'enveloppe est abaissée progressivement par remplissage partiel de façon que la distance du plan de travail au-dessus du niveau de l'eau reste en pratique inchangée tandis qu'après la mise en placé de chacun des tronçons de l'enveloppe et avant son abaisssment, le ou les éléments annulaires, renforçant ce tronçon, de la colonns ds béton (9) sont introduits dans l'enveloppe.
14.- Procédé selon la revendication 13, caractérisé en ce que chaque élément annulaire de la colonne de béton est coulé dans l'enveloppe au moyen d'un coffrage avec du béton préparé sur place.
EP83710015A 1982-06-02 1983-03-31 Colonne de support pour une plate-forme off-shore et son procédé de construction Expired EP0096650B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3220754 1982-06-02
DE3220754A DE3220754C2 (de) 1982-06-02 1982-06-02 Tragsäule für eine Überwasserplattform und Verfahren zu ihrer Herstellung

Publications (2)

Publication Number Publication Date
EP0096650A1 EP0096650A1 (fr) 1983-12-21
EP0096650B1 true EP0096650B1 (fr) 1986-02-26

Family

ID=6165095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83710015A Expired EP0096650B1 (fr) 1982-06-02 1983-03-31 Colonne de support pour une plate-forme off-shore et son procédé de construction

Country Status (3)

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EP (1) EP0096650B1 (fr)
DE (2) DE3220754C2 (fr)
NO (1) NO831974L (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3506123A1 (de) * 1985-02-22 1986-08-28 MAN Gutehoffnungshütte GmbH, 4200 Oberhausen Unterwasserstation mit gelenkturm fuer erdoel-, erdgasproduktion, meeresbergbau o.dgl.
NO162206C (no) * 1987-09-03 1989-11-22 Norske Stats Oljeselskap Fremgangsmaate til bygging av betongskaft for plattform eller liknende konstruksjon, samt seksjon til bruk ved samme.
NO167679C (no) * 1989-07-14 1991-11-27 Offshore Innovation Ltd A S Oppjekkbar oljerigg og hjoernesoeyle for fremstilling av samme.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348382A (en) * 1965-04-21 1967-10-24 Pan American Petroleum Corp Offshore platform for ice conditions
FR1482137A (fr) * 1966-04-12 1967-05-26 Appareil pour travaux de forage ou de fondation à l'air libre sur fonds marins ou fluviaux
GB1502900A (en) * 1975-09-18 1978-03-08 Brown D Vosper Ltd Offshore product loading terminal
DE2550621C3 (de) * 1975-11-11 1979-04-19 Bilfinger + Berger Bauaktiengesellschaft, 6800 Mannheim Eine Überwasserplattfocm tragender Pfeiler
NL8200232A (nl) * 1981-07-23 1983-02-16 Veth H Ingbureau Toren voor het vormen van een boor- en/of winningseiland.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PETROLEUM ENGINEER INTERNATIONAL, Band 52, Nr. 15, Dezember 1980, Seiten 66-76, Dallas, Texas, USA, G.W. MORGAN: "Modern production risers. Part 3 - More on the vertical transport section" *

Also Published As

Publication number Publication date
DE3220754A1 (de) 1983-12-08
NO831974L (no) 1983-12-05
EP0096650A1 (fr) 1983-12-21
DE3362247D1 (en) 1986-04-03
DE3220754C2 (de) 1985-04-25

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