EP0252840B1 - Ölplattform zum Bohren und zur Nutzung des Meeres - Google Patents

Ölplattform zum Bohren und zur Nutzung des Meeres Download PDF

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Publication number
EP0252840B1
EP0252840B1 EP87401597A EP87401597A EP0252840B1 EP 0252840 B1 EP0252840 B1 EP 0252840B1 EP 87401597 A EP87401597 A EP 87401597A EP 87401597 A EP87401597 A EP 87401597A EP 0252840 B1 EP0252840 B1 EP 0252840B1
Authority
EP
European Patent Office
Prior art keywords
legs
leg
shell
platform
space
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
EP87401597A
Other languages
English (en)
French (fr)
Other versions
EP0252840A1 (de
Inventor
Michel Ninger
Pierre-Armand Thomas
Jean-Claude Naudin
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 EP0252840A1 publication Critical patent/EP0252840A1/de
Application granted granted Critical
Publication of EP0252840B1 publication Critical patent/EP0252840B1/de
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
    • E02B17/02—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

Definitions

  • the present invention relates to oil platforms and relates more particularly to self-elevating platforms for drilling and exploitation at sea.
  • Self-elevating platforms generally comprise a hull mounted to move on legs which bear on the seabed, said hull in particular supporting a drilling floor and a drilling tower hereinafter called a derrick.
  • platforms are known whose hull has a lateral notch making it possible to carry out drilling work and operating operations by placing the drilling and / or operating equipment at- above the notch.
  • the platform of the latter type has the advantage of allowing all of the connection equipment between the underwater base of the wells above which it is placed on the one hand and the hull on the other hand to be find in the space defined by the legs of the platform and thus be relatively well protected against bad weather and floating bodies.
  • an oil platform comprising a hull supported by load-bearing legs disposed at the periphery of the hull and a leg defining a space in which connection equipment is arranged between the bottom and the shell, said leg defining the space in which the connecting equipment is arranged being a supporting leg.
  • a drilling floor is disposed on the hull, movable above the cross section of the leg defining the space for receiving said connecting equipment.
  • the leg defining the space for receiving the equipment is a central leg.
  • the platform cannot have less than four legs, which increases the cost of its manufacture.
  • a platform of the aforementioned type which comprises at least four legs is supported on the seabed in at least four corresponding zones which do not necessarily all have the same consistency. There are therefore risks that, for example, one of the peripheral legs of the platform tends to sink while the other legs meet a ground allowing them to have a firm support. This results in a certain instability of the platform.
  • the invention aims to create an oil platform which has good stability, which is of a relatively reduced cost price and whose connecting equipment between the bottom and the hull are protected with even greater efficiency.
  • the invention also aims to create a permanent platform which can allow reassemble the well heads at the surface without tensile forces at the level of the platform.
  • an oil platform comprising a hull supported by load-bearing legs bearing on the seabed and arranged at the periphery of the hull and a leg defining a space in which the connection equipment between the bottom and the hull, characterized in that the hull of the platform is of generally triangular shape and mounted displaceable on only three carrying legs, the leg defining the space for receiving said connecting equipment being one of said carrying legs, and in that a drilling floor is disposed on the movable shell above the cross section of the leg defining the space for receiving said connecting equipment.
  • - Fig.1 is a schematic elevational view of a self-elevating platform according to the invention.
  • - Fig.2 is a top view of the platform of Fig.1.
  • the platform shown in Fig.1 is a self-elevating platform comprising a shell 1 movable mounted on legs 2,3, formed of tubular uprights 4 joined together by lattices of metal beams 5.
  • the means of displacement of the shell on its legs are constituted by pinions driven by geared motors mounted on the hull, the pinions cooperating with racks carried by the legs (not shown).
  • the legs 2, 3 bear on the bottom by means of respective risers 6,7 of structure similar to that of the legs and immobilized with respect to the bottom by piles 8 stuck in the ground of the seabed.
  • the risers 6,7 are advantageously of the type described in patent application FR-A-2592075 in the name of the Applicant.
  • the platform according to the invention is a platform whose shell 1 is of generally triangular shape.
  • the shell 1 is mounted displaceable on three legs, two legs 2 of which are of triangular section and the third leg 3 of which is of larger square section than that of the legs 2.
  • the leg 3 can also be of triangular section.
  • On the hull 1 and above the upper end of the leg 3 of square section is mounted a drilling floor 9 movable on lateral rails 10 carried by pillars 11 fixed to the hull 1.
  • the drilling floor 9 is also movable on a track 12, perpendicular to the rails 11 which allows the center of the drilling floor to occupy any of the positions indicated by the points 13 above the cross section of the leg 3 of square section.
  • Drill floor 9 is associated with a movable derrick 14 with said floor.
  • connection materials are arranged between the seabed and the hull.
  • conduits 16 which connect the drilling floor 9 to the seabed and which extend into the space provided inside the strut 3 up to the extension 7 then into the space provided to the inside of it.
  • the drilling floor 9 and the derrick 14 can occupy a position clearing the cross section of the leg 3 to allow movement of the shell 1 on the legs 2,3.
  • connection materials between the bottom and the shell of the platform are protected on all sides by the walls formed by the uprights 4 and the lattices of metal beams 5, against any impact from floating bodies.
  • the cross section of the leg 4 of larger section advantageously corresponds to the dimensions of the underwater base or "template" of a well or a set of wells, the points 15 representing the positions which the center of the floor can occupy. drilling of leg 4, plumb with corresponding valves not shown of the underwater base.
  • the extension 7 which supports the leg 4 containing the connecting conduits 16 in fact constitutes the underwater base or template.
  • Such an arrangement also has the advantage to allow to ensure in complete safety the operations of "completion" which are the operations of equipment of the underground part of the well after the drilling operations.
  • conduits 16 for connection between the bottom and the surface are protected by the walls of the leg 4 makes it possible to eliminate the mechanical tensioning or "tensioning" of the conduits, an operation which is generally essential in the platforms of conventional operations.
  • the oil platform comprises a square section leg through which pass connecting equipment between the bottom and the hull.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Claims (5)

  1. Ölplattform mit einem Korpus (1), der durch Stüzbeine getragen ist, die sich auf dem Meeresboden abstützen und am Umfang des Korpus (1) angeordnet sind und von denen ein Bein (3) eInen Raum bildet, in dem die Verbindungseinrichtungen (16) zur Verbindung zwischen dem Meeresboden und dem Korpus (1) angeordnet sind, dadurch gekezennzeichnet, daß der Korpus der Plattform eine im wesentlichen dreieckige Form aufweist und verschiebbar auf nur drei Stützbeinen (2,3) angeordnet ist, daß das Stützbein (3), das den Raum zur Aufnahme der Verbindungseinrichtungen bildet, eines der Stützbeine (2,3) ist, und daß eine Bohrplattform (9) auf dem verschiebbaren Korpus über dem quergerichteten Abschnitt des Stützbeines (3) angeordnet ist, das den Raum zur Aufnahme der Verbindungseinrichtungen bildet.
  2. Plattform nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens ein weiteres Stützbein einen Raum zur Aufnahme der Verbindungseinrichtungen bildet.
  3. Plattform nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß das oder die Stützbeine (3), die einen Raum bilden, in dem die Einrichtungen (16) zur Verbindung zwischen dem Meeresboden und dem Korpus (1) untergebracht sind, einen oberen, quergerichteten Abschnitt aufweisen, der höher ist als diejenigen Abschnitte der anderen Stützbeine (2) der Plattform.
  4. Plattform nach Anspruch 3, dadurch gekennzeichnet, daß das oder die Stützbeine (3) im oberen Bereich einen rechteckigen bzw. quadratischen Querschnitt aufweisen.
  5. Plattform nach einem der Ansprüche 3 und 4, deren Stützbeine (2,3) abgestützt sind auf Erhöhungen (6,7), die in bezug auf den Boden festgelegt sind, dadurch gekennzeichnet, daß die Erhöhung oder Erhöhungen (7), die das oder die Beine (3) mit quergerichtetem oberen Abschnitt tragen. Unterwassersockel mit wenigstens einem auszubeutenden Bohrloch bilden.
EP87401597A 1986-07-10 1987-07-07 Ölplattform zum Bohren und zur Nutzung des Meeres Expired - Lifetime EP0252840B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8610098A FR2601396B1 (fr) 1986-07-10 1986-07-10 Plate-forme petroliere perfectionnee de forage et d'exploitation en mer.
FR8610098 1986-07-10

Publications (2)

Publication Number Publication Date
EP0252840A1 EP0252840A1 (de) 1988-01-13
EP0252840B1 true EP0252840B1 (de) 1991-04-03

Family

ID=9337322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87401597A Expired - Lifetime EP0252840B1 (de) 1986-07-10 1987-07-07 Ölplattform zum Bohren und zur Nutzung des Meeres

Country Status (3)

Country Link
EP (1) EP0252840B1 (de)
FR (1) FR2601396B1 (de)
NO (1) NO872844L (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1470530A (fr) * 1965-03-02 1967-02-24 Bethlehem Steel Corp Appareil pour la mise en position d'un derrick
US3881549A (en) * 1973-04-27 1975-05-06 Interseas Associates Production and flare caisson system
US4249619A (en) * 1979-06-04 1981-02-10 Texaco Development Corporation Deviated drilling apparatus
IT1131620B (it) * 1980-06-20 1986-06-25 Guido Santi Giunio Piattaforma per la coltivazione di idrocarburi a minimo tempo di costruzione e montaggio
GB2139570B (en) * 1983-04-28 1986-08-28 George Collingwood Copson Jack-up rig

Also Published As

Publication number Publication date
NO872844D0 (no) 1987-07-08
EP0252840A1 (de) 1988-01-13
FR2601396A1 (fr) 1988-01-15
FR2601396B1 (fr) 1990-01-05
NO872844L (no) 1988-01-11

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