EP0745729B1 - Self elevating platform for drilling or for oil exploitation on the sea - Google Patents

Self elevating platform for drilling or for oil exploitation on the sea Download PDF

Info

Publication number
EP0745729B1
EP0745729B1 EP96401122A EP96401122A EP0745729B1 EP 0745729 B1 EP0745729 B1 EP 0745729B1 EP 96401122 A EP96401122 A EP 96401122A EP 96401122 A EP96401122 A EP 96401122A EP 0745729 B1 EP0745729 B1 EP 0745729B1
Authority
EP
European Patent Office
Prior art keywords
chain
legs
platform according
leg
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.)
Expired - Lifetime
Application number
EP96401122A
Other languages
German (de)
French (fr)
Other versions
EP0745729A1 (en
Inventor
Pierre-Armand Thomas
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 EP0745729A1 publication Critical patent/EP0745729A1/en
Application granted granted Critical
Publication of EP0745729B1 publication Critical patent/EP0745729B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • 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
    • 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
    • E02B2017/0039—Methods for placing the offshore structure
    • E02B2017/0043—Placing the offshore structure on a pre-installed foundation structure
    • 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
    • E02B2017/0082—Spudcans, skirts or extended feet

Definitions

  • the subject of the present invention is a platform self-elevating drilling or offshore operation.
  • Platforms of this type include usually legs resting on the seabed and a hull mounted movable and adjustable in height the along the legs, said shell supporting in particular a drill floor and a drill tower.
  • the whole platform is brought in flotation to the drilling or operating site, and the legs are lowered in contact with a structure bearing or the seabed, then taking support from the legs, the hull is hoisted above sea level up to an altitude which puts it out of the reach of higher waves.
  • the shell is therefore movable along the legs of the platform by means of drive mechanisms housed in a structure well known to specialists under the name of "jack-house”.
  • These drive mechanisms include at least two opposite sets each formed by a motor associated with at least one reduction gear driven by a shaft an output pinion cooperating with racks opposite and mounted on the legs of the platform.
  • each leg is provided at its lower part of a foot, for example square or hexagonal which comes to rest directly on the bottom marine or on the supporting structure.
  • the racks extend practically over full length of legs and serve in their most large portion to hold these legs until installation of the platform on the operating site or drilling.
  • the racks serve, through gables, to slow down the descent of the legs until time each foot touches the seabed or the load-bearing structure.
  • each leg is made up of vertical members, three or three four, linked together by a trellis of metal beams.
  • Each frame is made up of sections welded end to end and each formed of a on the one hand by a rectangular plate and on the other by welded half-shell stiffeners each on one of the main faces of said plate.
  • the rectangular plates feature on their lateral face of the teeth which form the diametrically opposite racks, intended for cooperate with the output gears of the mechanisms drive.
  • a self-elevating drilling platform of the type comprising a movable mounted shell, between a flotation position and an operating position out of the water, on load-bearing legs by means of drive mechanisms comprising, per leg, two opposite sets each formed by a motor associated with a reduction gear driven by a shaft an output pinion cooperating with racks mounted on the legs.
  • the legs are movable between a raised position and a position supported on a supporting structure or on the seabed.
  • Each rack is provided on a corresponding leg length required for move the hull between the float position and the operating position.
  • the invention aims to remedy the disadvantages previously mentioned, by creating a oil drilling or exploitation platform in sea whose weight and hydrodynamic drag of legs are diminished.
  • the subject of the invention is therefore a platform self-elevating drilling or operating oil at sea, of the type comprising a hull mounted movable, between a floating position and a operating position above water, on legs load-bearing by means of drive mechanisms comprising at least two opposite sets each formed by a motor associated with at least one driving reduction gear by a shaft an output pinion cooperating with opposite racks mounted on the legs, said legs being movable between a position raised and a position supported on a structure carrier or the seabed, characterized in that each rack extends over a height between 20 and 30% of the total height of the corresponding leg for move the hull between the buoyancy position and the operating position and in that it includes means of controlling the descent of each leg to the supporting structure or to the seabed formed by at least one chain cooperating with an organ gear mounted on the drive shaft of a output pinion of a set, each chain comprising a first end connected to the foot of the leg corresponding and a second end connected to the hull, the length of said chain being sufficient for the descent
  • FIGs. 1 to 3 there is shown schematically a self-elevating drilling platform or offshore oil exploitation including a hull 1 movable and adjustable in position on legs vertical 2.
  • Each of the vertical legs 2 has, in the present case, a square section, and it is made up of four members 3 connected together by a lattice 4 of metal tubes.
  • the vertical legs 2 can also presented a triangular or circular section.
  • Each vertical leg 2 ends at its lower part by a foot 5 which, in the present example, is square, but can be square hexagonal.
  • the shell 1 is also equipped with operating equipment and premises habitual housing as well as a non-drilling tower represented.
  • the platform is brought into the waterline on the site, i.e. that hull 1 floats on water and most of it legs 2 is out of the water.
  • legs 2 went down so that the 5 feet rest on a structure carrier 6 placed on the seabed 7 or supported directly on the seabed 7 and, in a second time, hull 1 is hoisted above the level of the sea, up to an altitude that puts it out of reach higher waves, as shown in Fig. 2.
  • the movement of the legs 2 between the position raised and the position supported on the supporting structure 6 or on the seabed 7 is provided by means of control of the descent of each leg 2 and movement of hull 1 between the buoyancy position and the operating position above water is ensured by drive mechanisms.
  • the mechanisms 10 are provided at each members 3 of the vertical legs 2 and are housed in a structure well known to specialists under the name "Jack-house”.
  • Each drive mechanism 10 is composed at least two sets 11 opposite and each formed by a motor 12 associated with a reduction gear 13.
  • each drive mechanism 10 is consists of three pairs of sets 11 superimposed one above the other, the number of pairs of sets superimposed depending on the mass of the hull 1 to move.
  • Motor 12 and reducer 13 of each together 11 drive by a shaft 14 a pinion of outlet 15 which cooperates with a rack 16 provided on the corresponding member 3.
  • each member 3 of each of the legs 2 has two opposite racks 16 which extend only over a specified length said legs 2.
  • the pinions 15 and the racks 16 have, in the platform according to the invention, only for the purpose of ensuring the displacement of the shell 1 between the flotation position (Fig. 1) and the operating position out of the water (Fig. 2).
  • each rack 16 is arranged at the upper part of the members 3 of legs 2, as shown in Figs. 1 and 2.
  • the racks 16 extend over a height between 20 and 30% of the total height of legs 2.
  • the racks 16 extend over a height of 29 meters which represents approximately 22% of total leg height 2.
  • the platform according to the invention is equipped with means 20 for controlling the descent of each leg 2.
  • Each leg 2 is equipped with four means to control the descent of the corresponding leg 2 and each means consists of two chains 21 which cooperate with the lower assembly 11 of each mechanism 10.
  • each leg 2 is associated with eight chains 21 for the descent of the corresponding leg.
  • Each chain 21 has a first end 21a detachably connected to the corresponding foot 5 and a second end 21b connected to the shell 1.
  • each chain 21 cooperates with a engagement member 22 mounted on the drive shaft 14 of an output pinion 15.
  • each chain is sufficient to allow the descent of the corresponding leg 2 from its raised position to its position by pressing the supporting structure 6 or on the seabed 7.
  • Each engagement member 22 cooperating with a chain 21 is constituted for example by a wheel toothed or by a capstan wheel.
  • each engagement member 22 is greater than the diameter of the output pinion 15 of such so that the frame rate of each channel 21 is greater than the developed tangential speed of pinions 15 on the racks 16.
  • each chain 21 is connected to the foot 5 via a hook 25 which is itself connected to the foot 5 by a elastic connecting member 26 constituted for example by a superposition of elastic washers or by any other suitable device.
  • each chain 21 is therefore detachably connected to the corresponding foot 5 and is connected to the hull 1 by a recovery line 27 of which a first end 27a is connected to the end 21a of the corresponding chain and of which a second end 27b is fixed on the drum of a winch 28 allowing to go up the corresponding chain 21, as we will see later.
  • each chain 21 can be detached from the hook 25 for example by a robot or by any other appropriate means.
  • each foot 5 of the platform constitutes a buoyancy element making it possible to reduce the speed of descent of legs 2 and decrease the weight of these legs 2 as and when their descent.
  • the installation of the platform on the structure carrier 6 or on the seabed 7 is carried out from the next way.
  • motors 12 and reducers 13 drive in rotation the shafts 14, the pinions 15 and the members mesh 22 which has the effect of causing chains 21 and cause the legs to descend 2 by scrolling channels 21.
  • Chains 21 unfold gradually and the length of these chains is sufficient for the lowering of the legs 2 to the supporting structure 6 or to the seabed.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Description

La présente invention a pour objet une plate-forme auto-élévatrice de forage ou d'exploitation en mer.The subject of the present invention is a platform self-elevating drilling or offshore operation.

Les plates-formes de ce type comportent généralement des jambes prenant appui sur le fond marin et une coque montée déplaçable et réglable en hauteur le long des jambes, ladite coque supportant notamment un plancher de forage et une tour de forage.Platforms of this type include usually legs resting on the seabed and a hull mounted movable and adjustable in height the along the legs, said shell supporting in particular a drill floor and a drill tower.

L'ensemble de la plate-forme est amené en flottaison jusqu'au site de forage ou d'exploitation, et les jambes sont descendues au contact d'une structure porteuse ou du fond marin, puis en prenant appui sur les jambes, la coque est hissée au-dessus du niveau de la mer jusqu'à une altitude qui la met hors de la portée des plus hautes vagues.The whole platform is brought in flotation to the drilling or operating site, and the legs are lowered in contact with a structure bearing or the seabed, then taking support from the legs, the hull is hoisted above sea level up to an altitude which puts it out of the reach of higher waves.

La coque est donc déplaçable le long des jambes de la plate-forme au moyen de mécanismes d'entraínement logés dans une structure bien connue des spécialistes sous le nom de "jack-house".The shell is therefore movable along the legs of the platform by means of drive mechanisms housed in a structure well known to specialists under the name of "jack-house".

Ces mécanismes d'entraínement comportent au moins deux ensembles opposés formés chacun par un moteur associé à au moins un réducteur entraínant par un arbre un pignon de sortie coopérant avec des crémaillères opposées et montées sur les jambes de la plate-forme.These drive mechanisms include at least two opposite sets each formed by a motor associated with at least one reduction gear driven by a shaft an output pinion cooperating with racks opposite and mounted on the legs of the platform.

D'autre part, chaque jambe est munie à sa partie inférieure d'un pied, par exemple de forme carrée ou hexagonale qui vient s'appuyer directement sur le fond marin ou sur la structure porteuse.On the other hand, each leg is provided at its lower part of a foot, for example square or hexagonal which comes to rest directly on the bottom marine or on the supporting structure.

Les crémaillères s'étendent pratiquement sur toute la longueur des jambes et servent dans leur plus grande portion à retenir ces jambes jusqu'au moment de l'installation de la plate-forme sur le site d'exploitation ou de forage.The racks extend practically over full length of legs and serve in their most large portion to hold these legs until installation of the platform on the operating site or drilling.

Lors de l'installation de la plate-forme, les crémaillères servent , par l'intermédiaire des pignons, à freiner la descente des jambes jusqu'au moment où chaque pied touche le fond marin ou la structure porteuse.When installing the platform, the racks serve, through gables, to slow down the descent of the legs until time each foot touches the seabed or the load-bearing structure.

Ensuite, lors de la levée de la coque au-dessus du niveau de la mer, le poids de chaque jambe se dépose sur le fond marin ou la structure porteuse et la charge sur les pignons s'inverse et graduellement le poids de la coque est pris en compte par les crémaillères et les pignons au fur et à mesure que la coque sort progressivement de l'eau.Then when lifting the hull above from sea level, the weight of each leg is deposits on the seabed or the supporting structure and the load on the sprockets reverses and gradually the weight of the hull is taken into account by racks and pinions as the hull gradually comes out of the water.

Les crémaillères s'étendant pratiquement sur toute la longueur des jambes alourdissent de manière importante les jambes et augmentent la traínée hydrodynamique de ces jambes lors de la descente de celles-ci.Racks practically extending over the whole length of the legs weighs down so important legs and increase drag hydrodynamics of these legs during the descent of them.

De plus, l'usinage des crémaillères et le montage de ces crémaillères sur les jambes entraínent des opérations longues et fastidieuses qui augmentent le coût de fabrications des jambes et de ce fait de la plate-forme.In addition, the machining of the racks and the mounting these racks on the legs long and tedious operations that increase the cost of manufacturing the legs and therefore the platform.

En effet, chaque jambe est constituée par des membrures verticales, au nombre de trois ou de quatre, reliées entre elles par un treillis de poutrelles métalliques.Indeed, each leg is made up of vertical members, three or three four, linked together by a trellis of metal beams.

Chaque membrure est constituée par des tronçons soudés bout à bout et formés chacun, d'une part, par une plaque rectangulaire et, d'autre part, par des raidisseurs en forme de demi-coquille soudés chacun sur l'une des faces principales de ladite plaque.Each frame is made up of sections welded end to end and each formed of a on the one hand by a rectangular plate and on the other by welded half-shell stiffeners each on one of the main faces of said plate.

Les plaques rectangulaires comportent sur leur face latérale des dents qui forment les crémaillères diamétralement opposées, destinées à coopérer avec les pignons de sortie des mécanismes d'entraínement. The rectangular plates feature on their lateral face of the teeth which form the diametrically opposite racks, intended for cooperate with the output gears of the mechanisms drive.

On connaít dans le document FR-A-2 643 401 une plate-forme auto-élévatrice de forage du type comprenant une coque montée déplaçable, entre une position de flottaison et une position d'exploitation hors de l'eau, sur des jambes porteuses au moyen de mécanismes d'entraínement comportant, par jambe, deux ensembles opposés formés chacun par un moteur associé à un réducteur entraínant par un arbre un pignon de sortie coopérant avec des crémaillères montées sur les jambes. Les jambes sont déplaçables entre une position relevée et une position en appui sur une structure porteuse ou sur le fond marin. Chaque crémaillère est prévue sur une longueur de la jambe correspondante nécessaire pour déplacer la coque entre la position de flottaison et la position d'exploitation.We know in document FR-A-2 643 401 a self-elevating drilling platform of the type comprising a movable mounted shell, between a flotation position and an operating position out of the water, on load-bearing legs by means of drive mechanisms comprising, per leg, two opposite sets each formed by a motor associated with a reduction gear driven by a shaft an output pinion cooperating with racks mounted on the legs. The legs are movable between a raised position and a position supported on a supporting structure or on the seabed. Each rack is provided on a corresponding leg length required for move the hull between the float position and the operating position.

L'invention vise à remédier aux inconvénients précédemment mentionnés, en créant une plate-forme pétrolière de forage ou d'exploitation en mer dont le poids et la traínée hydrodynamique des jambes sont diminués.The invention aims to remedy the disadvantages previously mentioned, by creating a oil drilling or exploitation platform in sea whose weight and hydrodynamic drag of legs are diminished.

L'invention a donc pour objet une plate-forme auto-élévatrice de forage ou d'exploitation pétrolière en mer, du type comprenant une coque montée déplaçable, entre une position de flottaison et une position d'exploitation hors de l'eau, sur des jambes porteuses au moyen de mécanismes d'entraínement comportant au moins deux ensembles opposés formés chacun par un moteur associé à au moins un réducteur entraínant par un arbre un pignon de sortie coopérant avec des crémaillères opposées et montées sur les jambes, lesdites jambes étant déplaçables entre une position relevée et une position en appui sur une structure porteuse ou le fond marin, caractérisée en ce que chaque crémaillère s'étend sur une hauteur comprise entre 20 et 30% de la hauteur totale de la jambe correspondante pour déplacer la coque entre la position de flottaison et la position d'exploitation et en ce qu'elle comporte des moyens de contrôle de la descente de chaque jambe jusqu'à la structure porteuse ou jusqu'au fond marin formés par au moins une chaíne coopérant avec un organe d'engrènement monté sur l'arbre d'entraínement d'un pignon de sortie d'un ensemble, chaque chaíne comportant une première extrémité reliée au pied de la jambe correspondante et une seconde extrémité reliée à la coque, la longueur de ladite chaíne étant suffisante pour la descente de la jambe correspondante jusqu'à la structure porteuse ou jusqu'au fond marin.The subject of the invention is therefore a platform self-elevating drilling or operating oil at sea, of the type comprising a hull mounted movable, between a floating position and a operating position above water, on legs load-bearing by means of drive mechanisms comprising at least two opposite sets each formed by a motor associated with at least one driving reduction gear by a shaft an output pinion cooperating with opposite racks mounted on the legs, said legs being movable between a position raised and a position supported on a structure carrier or the seabed, characterized in that each rack extends over a height between 20 and 30% of the total height of the corresponding leg for move the hull between the buoyancy position and the operating position and in that it includes means of controlling the descent of each leg to the supporting structure or to the seabed formed by at least one chain cooperating with an organ gear mounted on the drive shaft of a output pinion of a set, each chain comprising a first end connected to the foot of the leg corresponding and a second end connected to the hull, the length of said chain being sufficient for the descent of the corresponding leg to the supporting structure or to the seabed.

Selon d'autres caractéristiques avantageuses de l'invention:

  • chaque jambe comporte à sa partie inférieure un pied formant un élément de flottabilité,
  • chaque crémaillère est disposée à la partie supérieure de la jambe correspondante,
  • la vitesse de défilement de chaque chaíne est supérieure à la vitesse tangentielle développée des pignons sur les crémaillères,
  • chaque organe d'engrènement est formé par une roue dentée ou une roue de cabestan,
  • la première extrémité de chaque chaíne est reliée au pied de la jambe correspondante par un organe de liaison élastique,
  • la première extrémité de chaque chaíne est détachable de l'organe de liaison élastique,
  • la première extrémité de chaque chaíne est raccordée à la coque par une ligne de récupération de la chaíne correspondante.
According to other advantageous features of the invention:
  • each leg has at its lower part a foot forming a buoyancy element,
  • each rack is placed at the top of the corresponding leg,
  • the running speed of each chain is greater than the tangential speed developed by the pinions on the racks,
  • each meshing member is formed by a toothed wheel or a capstan wheel,
  • the first end of each chain is connected to the foot of the corresponding leg by an elastic connecting member,
  • the first end of each chain is detachable from the elastic connecting member,
  • the first end of each chain is connected to the hull by a recovery line for the corresponding chain.

L'invention sera mieux comprise à l'aide de la description qui va suivre donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :

  • la Fig. 1 est une vue schématique en élévation d'une plate-forme auto-élévatrice selon l'invention, en configuration de descente des jambes,
  • la Fig. 2 est une vue schématique en élévation d'une plate-forme auto-élévatrice selon l'invention, en configuration d'exploitation,
  • la Fig. 3 est une vue de dessus de la plate-forme selon l'invention,
  • la Fig. 4 est une vue schématique à plus grande échelle d'une membrure d'une jambe de la plate-forme selon l'invention,
  • la Fig. 5 est une vue en coupe selon la ligne 5-5 de la Fig. 4,
  • la Fig. 6 est une vue en coupe selon la ligne 6-6 de la Fig. 4,
  • la Fig. 7 est une vue schématique en coupe montrant l'accrochage d'une chaíne sur un pied d'une jambe de la plate-forme selon l'invention.
The invention will be better understood with the aid of the description which follows, given solely by way of example and made with reference to the appended drawings, in which:
  • Fig. 1 is a schematic elevation view of a self-elevating platform according to the invention, in the descent configuration of the legs,
  • Fig. 2 is a schematic view in elevation of a jack-up platform according to the invention, in operating configuration,
  • Fig. 3 is a top view of the platform according to the invention,
  • Fig. 4 is a diagrammatic view on a larger scale of a member of a leg of the platform according to the invention,
  • Fig. 5 is a sectional view along line 5-5 of FIG. 4
  • Fig. 6 is a sectional view along line 6-6 of FIG. 4
  • Fig. 7 is a schematic sectional view showing the attachment of a chain on a foot of a leg of the platform according to the invention.

Sur les Figs. 1 à 3, on a représenté schématiquement une plate-forme auto-élévatrice de forage ou d'exploitation pétrolière en mer comprenant une coque 1 montée déplaçable et réglable en position sur des jambes verticales 2.In Figs. 1 to 3, there is shown schematically a self-elevating drilling platform or offshore oil exploitation including a hull 1 movable and adjustable in position on legs vertical 2.

Chacune des jambes verticale 2 présente, dans le cas présent, une section carrée, et elle est constituée de quatre membrures 3 reliées entre elles par un treillis 4 de tubes métalliques.Each of the vertical legs 2 has, in the present case, a square section, and it is made up of four members 3 connected together by a lattice 4 of metal tubes.

Les jambes verticales 2 peuvent également présentées une section triangulaire ou circulaire.The vertical legs 2 can also presented a triangular or circular section.

Chaque jambe verticale 2 se termine à sa partie inférieure par un pied 5 qui, dans le présent exemple, est de forme carrée, mais peut être de forme hexagonale.Each vertical leg 2 ends at its lower part by a foot 5 which, in the present example, is square, but can be square hexagonal.

De manière classique, la coque 1 est également pourvue d'équipements d'exploitation et de locaux d'habitation habituels ainsi qu'une tour de forage non représentée.Conventionally, the shell 1 is also equipped with operating equipment and premises habitual housing as well as a non-drilling tower represented.

Ainsi que représenté à la Fig. 1, la plate-forme est amenée en flottaison sur le site, c'est à dire que la coque 1 flotte sur l'eau et la plus grande partie des jambes 2 est hors de l'eau.As shown in FIG. 1, the platform is brought into the waterline on the site, i.e. that hull 1 floats on water and most of it legs 2 is out of the water.

Une fois la plate-forme en position sur le site, dans un premier temps, les jambes 2 sont descendues pour que les pieds 5 s'appuient sur une structure porteuse 6 placée sur le fond marin 7 ou s'appuient directement sur le fond marin 7 et, dans un deuxième temps, la coque 1 est hissée au-dessus du niveau de la mer, jusqu'à une altitude qui la met hors de la portée des plus hautes vagues, comme représenté à la Fig. 2.Once the platform in position on the site, at first, legs 2 went down so that the 5 feet rest on a structure carrier 6 placed on the seabed 7 or supported directly on the seabed 7 and, in a second time, hull 1 is hoisted above the level of the sea, up to an altitude that puts it out of reach higher waves, as shown in Fig. 2.

Le déplacement des jambes 2 entre la position relevée et la position en appui sur la structure porteuse 6 ou sur le fond marin 7 est assurée par des moyens de contrôle de la descente de chaque jambe 2 et le déplacement de la coque 1 entre la position de flottaison et la position d'exploitation hors de l'eau est assuré par des mécanismes d'entraínement.The movement of the legs 2 between the position raised and the position supported on the supporting structure 6 or on the seabed 7 is provided by means of control of the descent of each leg 2 and movement of hull 1 between the buoyancy position and the operating position above water is ensured by drive mechanisms.

Comme représenté à la Fig. 3, les mécanismes d'entraínement 10 sont prévus au niveau de chaque membrures 3 des jambes verticales 2 et sont logés dans une structure bien connue des spécialistes sous le nom "jack-house".As shown in Fig. 3, the mechanisms 10 are provided at each members 3 of the vertical legs 2 and are housed in a structure well known to specialists under the name "Jack-house".

En se reportant maintenant aux figures 4 à 6, on va décrire un mécanisme d'entraínement 10 associé à une membrure 3 d'une jambe 2, les autres mécanismes d'entraínement étant identiques.Referring now to Figures 4 to 6, we will describe a drive mechanism 10 associated with a frame 3 of a leg 2, the other mechanisms being identical.

Chaque mécanisme d'entraínement 10 se compose d'au moins deux ensembles 11 opposés et formés chacun par un moteur 12 associé à un réducteur 13.Each drive mechanism 10 is composed at least two sets 11 opposite and each formed by a motor 12 associated with a reduction gear 13.

Dans l'exemple de réalisation représenté sur les figures, chaque mécanisme d'entraínement 10 se compose de trois couples d'ensembles 11 superposés les uns au-dessus des autres, le nombre de couples d'ensembles superposés étant fonction de la masse de la coque 1 à déplacer.In the embodiment shown on the figures, each drive mechanism 10 is consists of three pairs of sets 11 superimposed one above the other, the number of pairs of sets superimposed depending on the mass of the hull 1 to move.

Le moteur 12 et le réducteur 13 de chaque ensemble 11 entraínent par une arbre 14 un pignon de sortie 15 qui coopère avec une crémaillère 16 prévue sur la membrure 3 correspondante.Motor 12 and reducer 13 of each together 11 drive by a shaft 14 a pinion of outlet 15 which cooperates with a rack 16 provided on the corresponding member 3.

Ainsi, chaque membrure 3 de chacune des jambes 2 comporte deux crémaillères 16 opposées et qui s'étendent uniquement sur une longueur déterminée desdites jambes 2.Thus, each member 3 of each of the legs 2 has two opposite racks 16 which extend only over a specified length said legs 2.

En effet, les pignons 15 et les crémaillères 16 ont, dans la plate-forme selon l'invention, uniquement pour but d'assurer le déplacement de la coque 1 entre la position de flottaison (Fig. 1) et la position d'exploitation hors de l'eau (Fig. 2).Indeed, the pinions 15 and the racks 16 have, in the platform according to the invention, only for the purpose of ensuring the displacement of the shell 1 between the flotation position (Fig. 1) and the operating position out of the water (Fig. 2).

Par conséquent, chaque crémaillère 16 est disposée à la partie supérieure des membrures 3 des jambes 2, comme représenté sur les Figs. 1 et 2.Consequently, each rack 16 is arranged at the upper part of the members 3 of legs 2, as shown in Figs. 1 and 2.

Les crémaillères 16 s'étendent sur une hauteur comprise entre 20 et 30% de la hauteur totale des jambes 2.The racks 16 extend over a height between 20 and 30% of the total height of legs 2.

A titre d'exemple, pour des jambes 2 ayant une hauteur de 132 mètres, les crémaillères 16 s'étendent sur une hauteur de 29 mètres ce qui représente environ 22% de la hauteur totale des jambes 2.For example, for legs 2 having a height of 132 meters, the racks 16 extend over a height of 29 meters which represents approximately 22% of total leg height 2.

Pour permettre la descente des jambes 2 jusqu'à la structure porteuse 6 ou jusqu'au fond marin 7, la plate-forme selon l'invention est équipée de moyens 20 de contrôle de la descente de chaque jambe 2.To allow the legs to descend 2 to supporting structure 6 or to the seabed 7, the platform according to the invention is equipped with means 20 for controlling the descent of each leg 2.

En se reportant aux Figs. 4 à 6, on va décrire un moyen de contrôle de la descente d'une jambe, les autres moyens étant identiques.Referring to Figs. 4 to 6, we will describe a means of controlling the descent of a leg, the other means being identical.

Chaque jambe 2 est équipée de quatre moyens de contrôle de la descente de la jambe 2 correspondante et chaque moyen se compose de deux chaínes 21 qui coopèrent avec l'ensemble inférieur 11 de chaque mécanisme d'entraínement 10.Each leg 2 is equipped with four means to control the descent of the corresponding leg 2 and each means consists of two chains 21 which cooperate with the lower assembly 11 of each mechanism 10.

Ainsi, chaque jambe 2 est associée avec huit chaínes 21 pour la descente de la jambe correspondante.So each leg 2 is associated with eight chains 21 for the descent of the corresponding leg.

Chaque chaíne 21 a une première extrémité 21a reliée de manière détachable au pied 5 correspondant et une seconde extrémité 21b reliée à la coque 1.Each chain 21 has a first end 21a detachably connected to the corresponding foot 5 and a second end 21b connected to the shell 1.

De plus, chaque chaíne 21 coopère avec un organe d'engrènement 22 monté sur l'arbre d'entraínement 14 d'un pignon de sortie 15.In addition, each chain 21 cooperates with a engagement member 22 mounted on the drive shaft 14 of an output pinion 15.

La longueur de chaque chaíne est suffisante pour permettre la descente de la jambe 2 correspondante de sa position relevée jusqu'à sa position en appui sur la structure porteuse 6 ou sur le fond marin 7.The length of each chain is sufficient to allow the descent of the corresponding leg 2 from its raised position to its position by pressing the supporting structure 6 or on the seabed 7.

Ainsi, lorsque chaque jambe est en position relevée comme représenté à la Fig. 1, le surplus de chaque chaíne 21 est stocké dans un puits 23 ménagé dans la coque 1.So when each leg is in position noted as shown in FIG. 1, the surplus of each chain 21 is stored in a well 23 formed in shell 1.

Chaque organe d'engrènement 22 coopérant avec une chaíne 21 est constitué par exemple par une roue dentée ou par une roue de cabestan.Each engagement member 22 cooperating with a chain 21 is constituted for example by a wheel toothed or by a capstan wheel.

Le diamètre de chaque organe d'engrènement 22 est supérieur au diamètre du pignon de sortie 15 de telle manière que la vitesse de défilement de chaque chaíne 21 soit supérieure à la vitesse tangentielle développée des pignons 15 sur les crémaillères 16.The diameter of each engagement member 22 is greater than the diameter of the output pinion 15 of such so that the frame rate of each channel 21 is greater than the developed tangential speed of pinions 15 on the racks 16.

Par ailleurs, la première extrémité 21a de chaque chaíne 21 est reliée au pied 5 par l'intermédiaire d'un crochet 25 qui est lui même relié au pied 5 par un organe de liaison élastique 26 constitué par exemple par une superposition de rondelles élastiques ou par tout autre dispositif approprié.Furthermore, the first end 21a of each chain 21 is connected to the foot 5 via a hook 25 which is itself connected to the foot 5 by a elastic connecting member 26 constituted for example by a superposition of elastic washers or by any other suitable device.

L'extrémité 21a de chaque chaíne 21 est donc reliée de manière amovible au pied 5 correspondant et est reliée à la coque 1 par une ligne de récupération 27 dont une première extrémité 27a est reliée à l'extrémité 21a de la chaíne correspondante et dont une seconde extrémité 27b est fixée sur le tambour d'un treuil 28 permettant de remonter la chaíne 21 correspondante, comme on le verra ultérieurement. The end 21a of each chain 21 is therefore detachably connected to the corresponding foot 5 and is connected to the hull 1 by a recovery line 27 of which a first end 27a is connected to the end 21a of the corresponding chain and of which a second end 27b is fixed on the drum of a winch 28 allowing to go up the corresponding chain 21, as we will see later.

L'extrémité 21a de chaque chaíne 21 peut être détachée du crochet 25 par exemple par un robot ou par tout autre moyen approprié.The end 21a of each chain 21 can be detached from the hook 25 for example by a robot or by any other appropriate means.

Enfin, chaque pied 5 de la plate-forme constitue un élément de flottabilité permettant de réduire la vitesse de descente des jambes 2 et de diminuer le poids de ces jambes 2 au fur et à mesure de leur descente.Finally, each foot 5 of the platform constitutes a buoyancy element making it possible to reduce the speed of descent of legs 2 and decrease the weight of these legs 2 as and when their descent.

La pose de la plate-forme sur la structure porteuse 6 ou sur le fond marin 7 s'effectue de la manière suivante.The installation of the platform on the structure carrier 6 or on the seabed 7 is carried out from the next way.

Lorsque la plate-forme a été amenée sur le site de forage ou d'exploitation par flottaison de la coque 1, les moteurs 12 et les réducteurs 13 entraínent en rotation les arbres 14, les pignons 15 et les organes d'engrènement 22 ce qui a pour effet d'entraíner les chaínes 21 et de provoquer la descente des jambes 2 par défilement des chaínes 21.When the platform was brought to the drilling or flotation site of the shell 1, motors 12 and reducers 13 drive in rotation the shafts 14, the pinions 15 and the members mesh 22 which has the effect of causing chains 21 and cause the legs to descend 2 by scrolling channels 21.

Les chaínes 21 se déroulent progressivement et la longueur de ces chaínes est suffisante pour la descente des jambes 2 jusqu'à la structure porteuse 6 ou jusqu'au fond marin.Chains 21 unfold gradually and the length of these chains is sufficient for the lowering of the legs 2 to the supporting structure 6 or to the seabed.

Avant que les pieds 5 des jambes 2 ne viennent en appui sur la structure porteuse 6 ou sur le fond marin 7, les crémaillères 16 engrènent progressivement sur les pignons 15 et le poids de la coque 1 est pris graduellement en compte au fur et à mesure que la coque 1 sort de l'eau par des pignons 15.Before feet 5 legs 2 come to bear on the supporting structure 6 or on the seabed 7, the racks 16 gradually mesh on the pinions 15 and the weight of the shell 1 is gradually taken into account as the hull 1 comes out of the water by sprockets 15.

Au cours de la descente des jambes 2, les pieds 5 qui forment des éléments de flottabilité retiennent ces jambes 2 diminuant ainsi les charges appliquées sur les chaínes 21 et les organes d'engrènement 22.During the descent of legs 2, the 5 feet which form buoyancy elements retain these legs 2 thus reducing the loads applied on the chains 21 and the engagement members 22.

Ensuite, la coque 1 est progressivement soulevée hors de l'eau par l'intermédiaire des crémaillères 16 et des pignons 15. Then, shell 1 is gradually lifted out of the water through racks 16 and pinions 15.

Une fois la plate-forme en position d'exploitation c'est à dire la coque 1 hors de l'eau, les extrémités 21a des chaínes 21 sont détachées des pieds 5 par tout moyen approprié et les chaínes 21 sont remontées sur la coque 1 par l'intermédiaire des lignes de récupération 27 et des treuils 28.Once the platform in position operating ie hull 1 out of the water, the ends 21a of the chains 21 are detached from the 5 feet by any appropriate means and the chains 21 are lifts on hull 1 via the lines recovery 27 and winches 28.

La limitation de la longueur des crémaillères 16 sur les membrures 3 des jambes 2 et le contrôle de façon positive de la descente des jambes 2 indépendamment des crémaillères 16 permet de réaliser un allégement des jambes 2, une réduction de la traínée hydrodynamique de ces jambes 2 et une réduction du coût de fabrication desdites jambes 2.Limiting the length of racks 16 on the members 3 of the legs 2 and the positive control of leg descent 2 independently from the racks 16 allows a leg relief 2, reduced drag hydrodynamics of these legs 2 and a reduction in cost for manufacturing said legs 2.

Claims (9)

  1. A jackup drilling or offshore oil development platform of the type comprising a hull (1) which is mounted moveably between a waterline position and an above-water development position on bearing legs (2) by means of drive mechanisms (10) including at least two opposite assemblies (11) each formed by a motor (12) connected to at least one reducer (13) driving, via a shaft (14), an output gear (15) cooperating with opposite racks (16) which are mounted on legs (2), said legs (2) being moveable between a raised position and a position of being supported on a bearing structure (6) or on the seabed (7), characterised in that each rack (16) extends over a height of between 20% and 30% of the total height of corresponding leg (2) in order to move hull (1) between the waterline position and the development position and in that the rack includes means (20) for controlling the descent of each leg (2) down to bearing structure (6) or down to seabed (7), whereby the control means are formed by at least one chain (21) cooperating with a gearing component (22) mounted on drive shaft (14) of an output gear (15) of an assembly (11), each chain (21) including a first end (21 a) connected to base (5) of corresponding leg (2) and a second end (21b) linked to hull (1), the length of said chain (21) being sufficient for the descent of corresponding leg (2) down to bearing structure (6) or down to seabed (7).
  2. The platform according to Claim 1, characterised in that each leg (2) includes, at its bottom part, a base (5) forming a buoyancy member.
  3. The platform according to Claim 1, characterised in that each rack (16) is disposed at the top part of corresponding leg (2).
  4. The platform according to Claim 1, characterised in that the unwinding speed of each chain (21) is greater than the advanced tangential speed of gears (15) on racks (16).
  5. The platform according to Claim 1, characterised in that each gearing component (22) is formed by a toothed wheel.
  6. The platform according to Claim 1, characterised in that each gearing component (22) is formed by a capstan wheel.
  7. The platform according to any one of Claims 1 to 4, characterised in that first end (21a) of each chain (21) is linked to base (5) of corresponding leg (2) by an elastic linking component (26).
  8. The platform according to Claim 7, characterised in that first end (21a) of each chain (21) can be detached from elastic linking component (26).
  9. The platform according to any one of the preceding claims, characterised in that first end (21a) of each chain (21) is connected to hull (1) by a line (27) for recovering corresponding chain (21).
EP96401122A 1995-06-02 1996-05-23 Self elevating platform for drilling or for oil exploitation on the sea Expired - Lifetime EP0745729B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9506604 1995-06-02
FR9506604A FR2734851B1 (en) 1995-06-02 1995-06-02 SELF-LIFTING PLATFORM FOR DRILLING OR OIL EXPLOITATION AT SEA.

Publications (2)

Publication Number Publication Date
EP0745729A1 EP0745729A1 (en) 1996-12-04
EP0745729B1 true EP0745729B1 (en) 2003-03-26

Family

ID=9479629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401122A Expired - Lifetime EP0745729B1 (en) 1995-06-02 1996-05-23 Self elevating platform for drilling or for oil exploitation on the sea

Country Status (8)

Country Link
US (1) US5833396A (en)
EP (1) EP0745729B1 (en)
JP (1) JP3754495B2 (en)
KR (1) KR100412012B1 (en)
ES (1) ES2194085T3 (en)
FR (1) FR2734851B1 (en)
NO (1) NO312207B1 (en)
SG (1) SG54338A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103089231A (en) * 2011-10-27 2013-05-08 中集船舶海洋工程设计研究院有限公司 Driving system of self-elevating type ocean platform

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759400B1 (en) * 1997-02-07 1999-04-23 Schlumberger Services Petrol OIL DRILLING PLATFORM OF THE JACK-UP TYPE OR WITH RACK PILLARS WITH RACK, INDEPENDENTLY ELEVATED FOR EACH MEMBRANE OF EACH PILLAR
FR2760474B1 (en) * 1997-03-07 1999-05-28 Technip Geoproduction METHOD FOR ASSEMBLING SECTIONS OF SUPPORT LEGS OF AN OIL PLATFORM
DK0942102T3 (en) * 1998-03-11 2005-01-10 Technip France Self-lifting platform with submerged reservoir and method for placing and raising the reservoir
US6200069B1 (en) 1999-07-20 2001-03-13 George Austin Miller Hovercraft work platform
FR2876124B1 (en) * 2004-10-06 2007-04-13 Technip France Sa OPERATING PLATFORM AT SEA AND METHODS OF INSTALLATION AT A SITE OPERATING AT SEA OF SUCH A PLATFORM
BRPI0606986A2 (en) * 2005-02-04 2010-03-16 Technip France complementary leg locking system on a bridge of an offshore exploration platform and process of placing a locking system
FR2913241B1 (en) * 2007-03-01 2009-06-05 Technip France Sa SELF-LIFTING PLATFORM OF VERY LARGE SIZE FOR THE TREATMENT OF OIL GAS AT SEA AND METHOD FOR ASSEMBLING AND INSTALLING SUCH A PLATFORM.
WO2008113389A1 (en) * 2007-03-20 2008-09-25 Siemens Aktiengesellschaft Jack-up platform
US20090090191A1 (en) * 2007-10-05 2009-04-09 Bernardino Lenders Methods and structures for monitoring offshore platform supports
US8336388B2 (en) 2007-10-05 2012-12-25 National Oilwell Varco, L.P. Methods and structures for monitoring offshore platform supports
CN101214846A (en) * 2007-12-29 2008-07-09 汪东君 Device for dismounting and mounting bicycle pedal and component for one-step controlling dismounting and mounting
FR2963367B1 (en) * 2010-07-30 2014-01-24 Cie Engrenages Et Reducteurs Messian Durand BOAT ELEVATOR
NL2005755C2 (en) * 2010-11-25 2012-05-29 Cobus Beheer B V Floating marine structure.
CN105035260B (en) * 2015-05-19 2017-06-16 中国海洋石油总公司 The method that platform upper chunk is thrown aside at support overall pulling down sea is floated using double ships
CN105603954B (en) * 2016-03-18 2017-11-24 中国石油集团渤海石油装备制造有限公司 A kind of device that sliding pile extension is turned to for pile legs of self-elevating drilling platform
CN106373449B (en) * 2016-10-18 2019-01-29 浙江海洋大学 A kind of ocean engineering experiment stage apparatus for simulating operation on the sea operating condition
FR3103000B1 (en) 2019-11-13 2022-08-05 Technip France Installation to support a self-elevating oil drilling or exploitation platform

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US516032A (en) * 1894-03-06 Submarine-drilling apparatus
US3011467A (en) * 1957-07-22 1961-12-05 Robert G Letourneau Mobile sea platform
US3044269A (en) * 1957-07-22 1962-07-17 Tourneau Robert G Le Mobile sea platform
US3014346A (en) * 1957-09-10 1961-12-26 Jersey Prod Res Co Method and means for raising and lowering a platform
US2996284A (en) * 1958-12-15 1961-08-15 Welborn Jack Vernon Shinning jack
GB1169262A (en) * 1965-08-10 1969-11-05 Vickers Ltd Improved floatable vessel
US3435621A (en) * 1966-07-26 1969-04-01 American Mach & Foundry Jacking system for offshore platforms
US3946684A (en) * 1971-01-18 1976-03-30 Sumner Maurice N Semi-submersible jackup apparatus
NL7508843A (en) * 1974-08-12 1976-02-16 Strabag Bau Ag PLATFORM FOR WORK AT SEA.
DE2549000A1 (en) * 1975-11-03 1977-05-12 Strabag Bau Ag PLATFORM FOR WORKING IN THE SEA
FI802781A (en) * 1979-09-07 1981-03-08 Brown & Ass James G STOEDSTRUKTUR FOER HAVSPLATTFORM
DE3112702A1 (en) * 1981-03-31 1982-10-07 Deutsche Babcock Anlagen Ag, 4200 Oberhausen LIFTING DEVICE FOR AN OFFSHORE CONSTRUCTION
FR2607165B1 (en) * 1986-11-26 1990-07-20 Technip Geoproduction SUSPENSION DEVICE FOR SELF-LIFTING OIL PLATFORM SUPPORT LEGS
FR2643401B1 (en) * 1989-02-22 1995-05-05 Brissonneau & Lotz MANEUVERING MECHANISMS OF SELF-LIFTING DRILLING PLATFORMS, AND PLATFORMS PROVIDED WITH SUCH MECHANISMS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103089231A (en) * 2011-10-27 2013-05-08 中集船舶海洋工程设计研究院有限公司 Driving system of self-elevating type ocean platform
CN103089231B (en) * 2011-10-27 2015-07-01 中集船舶海洋工程设计研究院有限公司 Driving system of self-elevating type ocean platform

Also Published As

Publication number Publication date
FR2734851B1 (en) 1999-03-05
JPH09100525A (en) 1997-04-15
KR100412012B1 (en) 2004-04-09
NO312207B1 (en) 2002-04-08
KR970001847A (en) 1997-01-24
EP0745729A1 (en) 1996-12-04
US5833396A (en) 1998-11-10
FR2734851A1 (en) 1996-12-06
NO962206L (en) 1996-12-03
NO962206D0 (en) 1996-05-30
SG54338A1 (en) 1998-11-16
ES2194085T3 (en) 2003-11-16
JP3754495B2 (en) 2006-03-15

Similar Documents

Publication Publication Date Title
EP0745729B1 (en) Self elevating platform for drilling or for oil exploitation on the sea
EP1798342B1 (en) Device for dismantling and transporting of an offshore platform
EP1487693B1 (en) Structure for the transport, installation and dismantlement of a bridge of a fixed oil platform and method for implementing said structure
EP0090006B1 (en) Floating device and procedure for hoisting and transporting loads
CA2280399C (en) Offshore accumulation development facility and riser pipe set-up process
EP0964102A1 (en) Transport and installation device for the deck of an offshore platform
FR2560280A1 (en) TOWER FOR DRILLING AND MAINTENANCE OF OIL WELLS OR GAS
EP2091808B1 (en) Structure for the transport, installation and dismantling of an oil rig deck and method for using one such structure
EP0942102B1 (en) Self-elevating platform with submerged reservoir and method for placing and raising the reservoir
EP1348867B1 (en) Offshore wind-power plant as well as construction and erection method for such a plant
EP0863260B1 (en) Method of joining supporting-leg sections of an oil-platform
EP0441673B1 (en) Jack-up oil platform
FR2492029A1 (en) SELF-ALIGNING AND SELF-TURNING PINION BLOCK FOR SELF-LIFTING PLATFORM LEG
EP0014661B1 (en) Device for the installation of a nuclear-reactor block in a vessel
US5797703A (en) Elevating unit for use with jack-up rig
FR2908733A1 (en) Bridge transporting, installing and disassembling structure for fixed or floating offshore oil drilling rig, has shuttle displaced between bottom position on shell and top position which raises bridge from offshore oil drilling rig by leg
BE887882A (en) STRUCTURE FOR SUPPORTING APPARATUS ABOVE THE BOTTOM OF A MASS OF WATER
FR2713588A1 (en) Self-elevating floating platform
EP0056753B1 (en) Lifting device for self-elevating off-shore platform
CA1281555C (en) Semi-submersible platform, namely for subseau deposit exploration and/or exploitation in cold waters
FR2493924A1 (en) Sea wave to mechanical energy converter - uses float on swinging arm driving double-sided ratchet mechanism to extract energy on rise and fall of wave
WO2021094191A1 (en) Installation for supporting a self-raising platform
WO1979000016A1 (en) Process for erecting a flame supporting structure on an oil extracting platform
FR2468542A1 (en) IMPROVEMENTS TO MARINE DERRICKS
FR2565290A1 (en) Method and device for boring wells

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): ES FI GB IT

17P Request for examination filed

Effective date: 19970509

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: TECHNIP FRANCE

17Q First examination report despatched

Effective date: 20010214

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): ES FI GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20030715

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2194085

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20031230

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20090527

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100523

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FI

Payment date: 20150420

Year of fee payment: 20

Ref country code: GB

Payment date: 20150518

Year of fee payment: 20

Ref country code: ES

Payment date: 20150525

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20160522

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20160522

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20160830

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20160524