EP1797245B1 - Ölbohrvorrichtung für das offene meer und verfahren zu ihrer installierung auf einer ölbohranlage auf dem offenen meer - Google Patents

Ölbohrvorrichtung für das offene meer und verfahren zu ihrer installierung auf einer ölbohranlage auf dem offenen meer Download PDF

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Publication number
EP1797245B1
EP1797245B1 EP05804232.6A EP05804232A EP1797245B1 EP 1797245 B1 EP1797245 B1 EP 1797245B1 EP 05804232 A EP05804232 A EP 05804232A EP 1797245 B1 EP1797245 B1 EP 1797245B1
Authority
EP
European Patent Office
Prior art keywords
leg
caisson
box
platform
seabed
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.)
Not-in-force
Application number
EP05804232.6A
Other languages
English (en)
French (fr)
Other versions
EP1797245A1 (de
Inventor
Pierre-Armand Tour Défense 2000 - THOMAS
Nicolas Tcherniguin
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 Energies France SAS
Original Assignee
Technip France SAS
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 France SAS filed Critical Technip France SAS
Publication of EP1797245A1 publication Critical patent/EP1797245A1/de
Application granted granted Critical
Publication of EP1797245B1 publication Critical patent/EP1797245B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • 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
    • 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
    • E02B2017/0078—Suction piles, suction cans

Definitions

  • the present invention relates to an offshore operating platform.
  • Offshore platforms of the self-elevating type such as oil rigs, generally include legs, including three in number, resting on the seabed, and a movable bridge mounted and adjustable in height along the legs and including operating equipment and living quarters.
  • each leg is equipped with a foot or a base to bear on the seabed when the platform is installed on a site of exploitation.
  • This foot or base of each leg has a contact surface with the seabed which is limited to support the weight of the platform that under calm sea conditions and for a relatively short time.
  • the legs of the platform must be firmly anchored in the seabed.
  • each leg is associated with a pumping unit so as to reduce the pressure inside the box and to penetrate this box in the seabed to a desired depth.
  • These boxes associated with a pumping unit are referred to by specialists as the "suction pile”.
  • each box is fixed and projecting below the foot or the base of the corresponding leg which has drawbacks.
  • this arrangement poses problems when assembling the boxes on the lower end of the legs of the platform. Indeed, the lower end of each leg is submerged in most cases so that the handling of these boxes requires a heavy infrastructure and complex because of the volumes to manage because these boxes have a diameter of about 17 to 20 meters and a height that can reach several meters.
  • the invention aims to remedy these drawbacks by proposing an offshore operating platform whose installation cost on a marine site is reduced.
  • FIG. 1 schematically shows an offshore operating platform, including self-elevating, comprising a bridge 1 provided with operating equipment and usual living quarters.
  • the bridge 1 is movably mounted on vertical legs 2 which each have a triangular section, as shown in FIG. Fig. 2 .
  • These legs 2 may also have a square or circular section and they may be three or four, evenly distributed on the bridge 1.
  • each leg 2 is formed of three ribs 3 connected to each other by a trellis of metal beams 4.
  • a trellis of metal beams 4 On the Figs. 1 , 6 and 7 only two members 3 have been shown for simplification purposes.
  • the displacement of the bridge 1 on the legs 2 is effected by means of drive mechanisms, not shown, housed for each leg, in a supporting frame 5 also called by the "jack-house” specialists.
  • Each supporting frame 5 is supported by the bridge 1 and the drive mechanisms are formed, in a conventional manner by geared motor assemblies each driving an output pinion cooperating with racks 6 disposed on the frames 3 of each leg 2, and that shown to the Fig. 2 .
  • These legs 2 are intended to bear on the seabed 7 ( Fig. 6 and 7 ) when the platform is in the drilling or operating position and, for this purpose, each leg 2 ends, at its lower part, with a base 8.
  • each leg 2 comprises, at its lower part, a box 10 open at its base and which is intended to penetrate into the seabed 7 to a desired depth so as to anchor the corresponding leg 2 in this seabed, as we will see later.
  • each box 10 is connected to a pumping unit, not shown, so as to reduce the pressure inside the box 10 and to make it penetrate the seabed 7 at the time of installation of the plate on the operating site.
  • the casing 10 of each leg 2 is disposed inside the corresponding leg 2 and is displaceable in the axis of this leg 2 between an upper retracted position ( Fig. 1 and 3 ) in which only the lower end 10a of this box 10 protrudes below the base 8 of the leg 2 and a low protruding position ( Fig. 7 ) in which only the upper end 10b of this box 10 is disposed in the leg 2.
  • each leg 2 comprise at least one support member on the corresponding box 10 in the upper position of this box 10 so as to prevent the rise of said box during the application of the lower end of this leg 2 on the seabed 7 and each box 10 has locking means on the corresponding leg 2 in its lower position so as to block the box 10 in the lower anchoring position of the corresponding leg 2 on the seabed 7.
  • each support member on the casing 10 in each leg 2 is constituted by a horizontal abutment stop 20 and fixed on a chord 3 inside the leg 2 above the upper end 10b of the casing 10 in its high retracted position ( Fig. 3 ).
  • the distance between the bearing stops 20 and the base 8 of the leg 2 is less than the height of the box 10 of the leg 2 so as to maintain the lower part 10a of the box 10 below the base 8 in the up position. retracted from this box 10.
  • the box 10 has a cross section conjugate to the cross section of the leg 2 and, in this case, a triangular cross section.
  • the locking means of the box 10 comprise an arm 25 for each frame 3 of the leg 2 and mounted on the upper end 10b of the box 10, as appears in the Fig. 4 .
  • the arms 25 extend above the box 10 and are inclined towards the outside of this box 10.
  • each arm 25 has a first end 25a mounted articulated on the box 10 and a second end 25b, said free end which is provided with two opposite pins 26 extending transversely with respect to the longitudinal axis of the arm 25.
  • Each arm 25 is displaceable between this inclined position in which the end 25b is held pressed against a frame 3 of the leg 2 and a substantially vertical position during the translation of the box 10 between the retracted high position and the low projecting position, as will be described later.
  • each arm 25 is provided for example by a jack 27, such as for example a hydraulic cylinder, pneumatic or electric, disposed on the upper face of the box 10.
  • a jack 27 such as for example a hydraulic cylinder, pneumatic or electric, disposed on the upper face of the box 10.
  • each arm 25 may be provided by any other appropriate member of known type, such as for example an elastic member holding the corresponding arm 25 in its inclined position towards the outside of the box 10.
  • each arm 25 may have a shape suitable for this arm is inclined outwardly of the box in its normal position and an elastic portion holding the arm in this position.
  • the locking means of the box 10 in the low projecting position also comprise a lower stop ( Figs. 3 and 5 ) fixed on each chord 3, disposed inside and at the lower end of each chord 3 of a leg 2.
  • each upper lateral edge of the stops 30 is equipped with a flange 30a forming with the opposite flange 30a a space 32 extending upwards and in the shape of a V ( Fig. 5 ) for guiding the corresponding stop 31.
  • each box 10 comprises an intermediate stop 35 fixed on each frame 3, disposed inside the leg 2 above the lower stops 30.
  • Each stop 35 is constituted, as shown in FIG. Fig. 5 two parallel elements 35a and forming between them a V-shaped space 36 for guiding and passing a stop 31 during the descent of the box 10.
  • each box 10 comprise at least two opposite arms 25, at least two opposite lower stops 30 and at least two intermediate stops 35 also opposed.
  • these elements 25, 30 and 35 are preferably three in number each and in the case of a leg 2 with a square section, said elements 25, 30 and 35 are preferably in number of four each.
  • the installation of the platform on an operating site is carried out as follows.
  • the platform is brought to the site by floatation or on a barge.
  • the legs 2 of the platform are in the raised position and the box 10 of each leg 2 is in the raised position retracted into the corresponding leg 2.
  • Each box 10 is held in this position for example by applying the ends 25b of the arms 25 to the ribs 3 of the legs 2 by means of the cylinders 27 or by any other appropriate means, such as for example a chain connecting the box 10 to the bridge 1 of the platform.
  • the legs 2 When the platform is on the operating site, the legs 2 are gradually lowered by means of the drive mechanisms carried by the bridge 1 and which act on the racks 6 of the chords 3 of said legs 2. These legs 2 are gradually lowered to the application of the bases 8 on the seabed 7, as shown in FIG. Fig. 6 . During the descent of each leg 2, the bearing stops 20 of the leg 2 are in contact with the box 10 so as to penetrate the lower portion 10a of the box 10 in the seabed 7.
  • the next step is to anchor the legs 2 in the seabed 7 by means of the caissons 10.
  • the pressure inside the box 10 is reduced by means of the pump unit associated with the box 10 so as to cause a progressive descent of the box 10 which enters the seabed 7.
  • the arms 25 are tilted by the cylinders 27 substantially in a vertical position so as to allow these arms 25 to pass between the bearing abutments 20 and between the intermediate stops 35.
  • the stops 31 of the box 30 pass into the space 36 between the elements 35a of the intermediate stops 35 and these stops 31 bear against the lower stops 30 of the ribs 3 of the legs 2, as shown in FIG. Fig. 7 .
  • deck 1 of the platform can be raised before the caissons 10 are driven into the seabed 7.
  • the stops 30 and 31 which are in contact in the anchoring position of the legs 2 by the box 10 allow, in the case where the legs 2 are raised, these boxes 10 to follow the movement.
  • each box 10 can be completely retracted into the corresponding leg 2.
  • 3 members are not equipped with bearing stops 20 and the lower end 10a of each box 10 is not projecting below the base 8 in the retracted high position of the box 10.
  • the platform according to the invention has the advantage, thanks to the retractable anchoring boxes in the legs, to have a reduced draft during its transport on a site of exploitation compared to the platforms of this type used so far.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Earth Drilling (AREA)
  • Bridges Or Land Bridges (AREA)
  • Revetment (AREA)
  • Foundations (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Claims (6)

  1. Plattform für Meeresbetrieb, des Typs aufweisend eine Brücke (1), die auf Beinen (2) verlagerbar montiert ist, welche jeweils an ihrem unteren Teil einen Sockel (8) zum Abstützen auf dem Meeresboden (7) und einen Kasten (10) aufweisen, der an seiner Basis offen ist und der vorgesehen ist, um in den Meeresboden (7) einzudringen zum Verankern der Plattform (1), wobei jeder Kasten (1) im Innern eines Beins (2) angeordnet ist und in der Achse dieses Beins (2) verlagerbar ist zwischen einer hochgelegenen eingefahrenen Position und einer tiefgelegenen bezüglich des Sockels (8) des Beins (2) vorspringenden und im Meeresboden verankerten Position, wobei jeder Kasten (10) aufweist Mittel (25, 30, 31, 35) zum Verriegeln an dem Bein (2) in der tiefgelegenen Position des Kastens (10), dadurch gekennzeichnet, dass die Mittel zum Verriegeln mechanisch sind und für jeden Kasten (10) aufweisen:
    - wenigstens zwei gegenüberliegende Arme (25), die an dem oberen Ende des Kastens (10) angebracht sind und sich über dem Kasten (10) erstrecken,
    - wenigstens zwei gegenüberliegende untere Anschläge(30), die im Inneren und am unteren Ende des Beins (2) angeordnet sind und die vorgesehen sind, um jeweils in der tiefgelegenen Position des Kastens (10) mit einem Anschlag (31) zusammenzuwirken, der am oberen Ende des Kastens (10) angeordnet ist, und
    - wenigstens zwei gegenüberliegende Zwischenanschläge (35), die im Innern des Beins (2) über den unteren Anschlägen (30) angeordnet sind und die vorgesehen sind, um jeweils das freie Ende (25b) eines Arms (25) in der tiefgelegenen Position des Kastens (10) zu blockieren.
  2. Plattform gemäß Anspruch 1, dadurch gekennzeichnet, dass in der hochgelegenen ausgefahrenen Position des Kastens (10) nur das untere Ende (10a) des Kastens (10) unter den Sockel (8) des Beins (2) vorsteht und in der tiefgelegenen vorspringenden Position des Kastens (10) nur das obere Ende (10b) des Kastens (10) im Bein (2) angeordnet ist.
  3. Plattform gemäß Anspruch 2, dadurch gekennzeichnet, dass das Bein (2) wenigstens ein Organ (20) zum Abstützen auf dem Kasten (10) in der hochgelegenen Position dieses Kastens (10) aufweist.
  4. Plattform gemäß Anspruch 3, dadurch gekennzeichnet, dass jedes Bein (2) Glieder (3) aufweist und dass das wenigstens eine Organ zum Abstützen auf dem Kasten (10) gebildet ist von einem Abstützanschlag (20), der an jedem Glied (3) im Innern des korrespondierenden Beins (2) befestigt ist.
  5. Plattform gemäß Anspruch 4, dadurch gekennzeichnet, dass der Abstand, welcher die Abstützanschläge (20) und den Sockel (8) des Beins trennt, kleiner ist als die Höhe des Kastens (10) dieses Beins (2).
  6. Plattform gemäß irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Arme (25) zum Äußeren des Kastens (10) hin geneigt sind und zwischen dieser geneigten Position und einer im Wesentlichen vertikalen Position verlagerbar sind infolge der Translation des Kastens (10).
EP05804232.6A 2004-10-06 2005-09-26 Ölbohrvorrichtung für das offene meer und verfahren zu ihrer installierung auf einer ölbohranlage auf dem offenen meer Not-in-force EP1797245B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0410545A FR2876124B1 (fr) 2004-10-06 2004-10-06 Plate-forme d'exploitation en mer et procedes d'installation sur un site d'exploitation en mer d'une telle plate-forme
PCT/FR2005/002379 WO2006037871A1 (fr) 2004-10-06 2005-09-26 Plate-forme d'exploitation en mer et procedes d'installation sur un site d'exploitation en mer d'une telle plate-forme

Publications (2)

Publication Number Publication Date
EP1797245A1 EP1797245A1 (de) 2007-06-20
EP1797245B1 true EP1797245B1 (de) 2014-11-12

Family

ID=34949456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05804232.6A Not-in-force EP1797245B1 (de) 2004-10-06 2005-09-26 Ölbohrvorrichtung für das offene meer und verfahren zu ihrer installierung auf einer ölbohranlage auf dem offenen meer

Country Status (11)

Country Link
US (1) US7690866B2 (de)
EP (1) EP1797245B1 (de)
KR (1) KR101338570B1 (de)
AU (1) AU2005291133B2 (de)
DK (1) DK1797245T3 (de)
EA (1) EA009612B1 (de)
ES (1) ES2530276T3 (de)
FR (1) FR2876124B1 (de)
MX (1) MX2007003811A (de)
NO (1) NO20071588L (de)
WO (1) WO2006037871A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130139930A (ko) * 2010-10-21 2013-12-23 코노코 필립스 컴퍼니 예비 하중 인장 시스템을 갖는 얼음에 적합한 잭-업 굴착선
KR102093844B1 (ko) * 2013-12-26 2020-03-26 재단법인 포항산업과학연구원 잭업 리그와 잭업 리그의 승강 장치

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909901A (en) * 1954-11-16 1959-10-27 De Long Corp Tank footing members for a combined barge and working platform assembly
US2908142A (en) * 1956-09-28 1959-10-13 De Long Corp Supporting leg assembly for marine platform
US2994202A (en) * 1958-01-27 1961-08-01 Jersey Prod Res Co Hydraulic mooring means
US3797256A (en) * 1972-09-08 1974-03-19 Sharp Inc G Jack-up type offshore platform apparatus
US4372707A (en) * 1979-11-29 1983-02-08 Pipe Technology Systems, Inc. Pile installation and removal mechanisms in off-shore rigs and method of using same
FR2607165B1 (fr) * 1986-11-26 1990-07-20 Technip Geoproduction Dispositif de suspension des jambes de support de plate-forme petroliere auto-elevatrice
FR2734851B1 (fr) * 1995-06-02 1999-03-05 Technip Geoproduction Plate-forme auto-elevatrice de forage ou d'exploitation petroliere en mer.

Also Published As

Publication number Publication date
DK1797245T3 (en) 2015-02-23
EP1797245A1 (de) 2007-06-20
WO2006037871A1 (fr) 2006-04-13
EA200700812A1 (ru) 2007-08-31
US20070231075A1 (en) 2007-10-04
MX2007003811A (es) 2007-05-24
KR20070061549A (ko) 2007-06-13
US7690866B2 (en) 2010-04-06
KR101338570B1 (ko) 2013-12-06
AU2005291133A1 (en) 2006-04-13
ES2530276T3 (es) 2015-02-27
FR2876124B1 (fr) 2007-04-13
EA009612B1 (ru) 2008-02-28
FR2876124A1 (fr) 2006-04-07
NO20071588L (no) 2007-05-07
AU2005291133B2 (en) 2010-12-02

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