EP0056551A1 - Elastic means for an elevating device for an offshore platform - Google Patents

Elastic means for an elevating device for an offshore platform Download PDF

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Publication number
EP0056551A1
EP0056551A1 EP81402058A EP81402058A EP0056551A1 EP 0056551 A1 EP0056551 A1 EP 0056551A1 EP 81402058 A EP81402058 A EP 81402058A EP 81402058 A EP81402058 A EP 81402058A EP 0056551 A1 EP0056551 A1 EP 0056551A1
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EP
European Patent Office
Prior art keywords
elastic means
rack
frame
pinions
platform
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81402058A
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German (de)
French (fr)
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EP0056551B1 (en
Inventor
Jean Havard
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.)
Brissonneau et Lotz Marine SA
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Brissonneau et Lotz Marine SA
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Publication date
Application filed by Brissonneau et Lotz Marine SA filed Critical Brissonneau et Lotz Marine SA
Priority to AT81402058T priority Critical patent/ATE11944T1/en
Publication of EP0056551A1 publication Critical patent/EP0056551A1/en
Application granted granted Critical
Publication of EP0056551B1 publication Critical patent/EP0056551B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • 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
    • E02B17/024—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 shock absorbing means for the supporting construction
    • 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

Definitions

  • the present invention relates to installations of so-called self-elevating marine platforms, in particular provided for carrying out drilling operations at sea, provided with a plurality of legs and a plurality of associated lifting devices of the pinion and rack type making it possible to adjust the position and the maintenance in position of said platform on said legs.
  • a plurality of legs and a plurality of associated lifting devices of the pinion and rack type making it possible to adjust the position and the maintenance in position of said platform on said legs.
  • an elevating device comprising at least one pair of pinions connected to the structure of the platform by means of a frame.
  • each of said pinions respectively meshing with one of the two teeth of said rack and being driven in rotation by motor and reducing means, so as to determine in one direction or the other the required movements.
  • These elastic means which can be constituted, for example, by an assembly formed of metal plates such as steel, interposed with plates of an elastic material, have a high compressive strength and can be deformed axially and, in a certain measure transversely, consequently authorizing relative freedom of movement between the frame and the structure of the platform.
  • the object of the present invention is to obviate this drawback and has for its object a particular favorable arrangement of the elastic means interposed between the frame and the structure of the platform.
  • each of the lifting devices comprises two groups of pinions driven in rotation by motor means, by means of gears fixed to a frame mounted on the platform , the pinions of one and the other group respectively meshing with one of the teeth of a double rack having two opposite parallel teeth, integral with the corresponding leg.
  • the compression axis of the elastic means is inclined so as to determine an oblique position of said means, the angle of inclination being such that said axis passes substantially through the instantaneous center of rotation of the upper part of said leg.
  • Figures 1 and 2 show an elevator device connected to the structure of a platform by means of elastic means arranged in accordance with the invention according to two embodiments.
  • reference 1 designates the structure of the platform.
  • Reference 2 designates the frame carrying the drive members acting on the pinions 3 (two in number in the examples shown).
  • the rotation of these pinions 3 controls the relative movements of the double rack 4 either in one direction, to determine the elevation of the platform above the surface of the sea when the feet secured to the rack are supported on the seabed, in the other direction so that the lifting of these feet allows the platform to float.
  • the elastic means are arranged between an oblique sole 6 formed in a recess of a foot 7 secured to the frame 2 and a corresponding sole 8 projecting from the structure of the platform.
  • the elastic damping means 5 are arranged between an oblique sole 6 formed on the part 9 of the frame 2, extended laterally for this purpose and a corresponding sole 8 projecting from the structure of the platform .
  • the compression axes of the elastic means 5 are inclined, the flanges 6 and 8 between which they are arranged also being inclined relative to the horizontal for this purpose.
  • these compression axes pass substantially through the instantaneous center of rotation of the upper part of the leg so that virtually any variation in the compression force applied to these elastic means is eliminated and that only the shear force be applied to it. It follows from this arrangement that the load applied to the teeth of the pinions remains substantially constant whatever the relative movements carried out.

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  • General Engineering & Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Types And Forms Of Lifts (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Vibration Dampers (AREA)
  • Paper (AREA)
  • Vibration Prevention Devices (AREA)
  • Details Of Aerials (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Transmission Devices (AREA)

Abstract

The present invention applies to those auto-elevating marine platforms, as for deep-sea drilling and the like, outfitted with a number of legs and a number of associated jacking mechanisms of the rack and pinion type set with the rack's teeth in opposition, wherein a flexible coupling (5), the axis of compression of which is inclined, is placed between the support-framework (2), where the pinions (3) are mounted, and the main structure (1) of the platform in such a way that a relative freedom of movement between the support-framework (2) and the structure (1) is permitted. The intention is that the axis of compression of the flexible coupling (5) passes substantially directly through the instantaneous center of rotation of the upper part of the leg.

Description

La présente invention concerne les installations de plates-formes marines dites auto-élévatrices notamment prévues pour effectuer des opérations de forage en mer, pourvues d'une pluralité de jambes et d'une pluralité de dispositifs élévateurs associés du type à pignons et crémaillère permettant de régler la position et le maintien en position de ladite plate-forme sur lesdites jambes. A cet effet, sur chacune des jambes est fixée rigidement au moins une crémaillère double à dentures opposées à laquelle est associé un dispositif élévateur comprenant au moins une paire de pignons reliés à la structure de la plate-forme par l'intermédiaire d'un bâti, chacun des dits pignons engrènant respectivement avec l'une des deux dentures de ladite crémaillère et étant entraînés en rotation par des moyens moteurs et réducteurs, de manière à déterminer dans un sens ou dans l'autre les mouvements requis.The present invention relates to installations of so-called self-elevating marine platforms, in particular provided for carrying out drilling operations at sea, provided with a plurality of legs and a plurality of associated lifting devices of the pinion and rack type making it possible to adjust the position and the maintenance in position of said platform on said legs. To this end, on each of the legs is rigidly fixed at least one double rack with opposite teeth to which is associated an elevating device comprising at least one pair of pinions connected to the structure of the platform by means of a frame. , each of said pinions respectively meshing with one of the two teeth of said rack and being driven in rotation by motor and reducing means, so as to determine in one direction or the other the required movements.

Un tel dispositif.élévateur mécanique a, par exemple, été décrit pages 21 à 24 de la revue "Lapis Industrial Opportunities", n° 37 publiée en Octobre 1961, dans un article intitulé "Platform jacking mechanisms" (Mécanismes élévateurs de plate-forme).Such a mechanical lifting device has, for example, been described on pages 21 to 24 of the review "Lapis Industrial Opportunities", No. 37 published in October 1961, in an article entitled "Platf or m jacking mechanisms" -form).

Il est connu, d'autre part, de relier le bâti où sont fixés les pignons à la structure par des moyens élastiques comme décrit dans le brevet américain 3.606.251 ou dans le brevet britannique 1.089.669 à propos d'un autre type de dispositif élévateur, de manière à autoriser un léger déplacement latéral des jambes par rapport à la structure de la plate-forme.It is known, on the other hand, to connect the frame where the pinions are fixed to the structure by elastic means as described in American patent 3,606,251 or in British patent 1,089,669 in connection with another type of lifting device, so as to allow a slight lateral movement of the legs relative to the structure of the platform.

Ces moyens élastiques, qui peuvent être constitués, par exemple, par un ensemble formé de plaques métalliques telles que d'acier, intercalées avec des plaques d'un matériau élastique, présentent une grande résistance à la compression et peuvent être déformés axialement et, dans une certaine mesure transversalement, autorisant en conséquence une relative liberté de mouvement entre le bâti et la structure de la plate-forme.These elastic means, which can be constituted, for example, by an assembly formed of metal plates such as steel, interposed with plates of an elastic material, have a high compressive strength and can be deformed axially and, in a certain measure transversely, consequently authorizing relative freedom of movement between the frame and the structure of the platform.

Toutefois, il résulte de cette disposition, que ces moyens élastiques travaillent simultanément en compression et en cisaillement.However, it follows from this arrangement, that these elastic means work simultaneously in compression and in shear.

La présente invention a pour but d'obvier à cet inconvénient et a pour objet une disposition particulière favorable des moyens élastiques interposés entre le bâti et la.structure de la plate-forme.The object of the present invention is to obviate this drawback and has for its object a particular favorable arrangement of the elastic means interposed between the frame and the structure of the platform.

Parmi les principaux avantages de cette disposition, on peut citer l'efficacité de celle-ci et le fait que le bâti peut suivre le déplacement angulaire de la jambe sans induire de variation de compression notable dans les moyens élastiques utilisés, ce dont il résulte que les forces appliquées aux pignons restent sensiblement constantes.Among the main advantages of this arrangement, one can cite its efficiency and the fact that the frame can follow the angular displacement of the leg without inducing any significant compression variation in the elastic means used, which results in that the forces applied to the pinions remain substantially constant.

L'invention est applicable aux installations connues de telles plates-formes, dans lesquelles chacun des dispositifs élévateurs comprend deux groupes de pignons entraînés en rotation par des moyens moteurs, par l'intermédiaire d'engrenages fixés sur un bâti monté sur la plate-forme, les pignons de l'un et l'autre groupesengrè- nant respectivement avec l'une des dentures d'une crémaillère double présentant deux dentures parallèles opposées, solidaire de la jambe correspondante.The invention is applicable to known installations of such platforms, in which each of the lifting devices comprises two groups of pinions driven in rotation by motor means, by means of gears fixed to a frame mounted on the platform , the pinions of one and the other group respectively meshing with one of the teeth of a double rack having two opposite parallel teeth, integral with the corresponding leg.

Selon l'invention, l'axe de compression des moyens élastiques est incliné de manière à déterminer une position oblique des dits moyens, l'angle d'inclinaison étant tel que ledit axe passe sensiblement par le centre instantané de rotation de la partie supérieure de ladite jambe.According to the invention, the compression axis of the elastic means is inclined so as to determine an oblique position of said means, the angle of inclination being such that said axis passes substantially through the instantaneous center of rotation of the upper part of said leg.

La présente invention sera mieux comprise et d'autres buts, avantages et caractéristiques de celle-ci apparaîtront plus clairement à la lecture de la description qui suitThe present invention will be better understood and other objects, advantages and characteristics thereof will appear more clearly on reading the description which follows

à laquelle deux planches de dessins sont annexées à titre d'exemples de modes de réalisation.to which two drawing plates are appended as examples of embodiments.

Les figures 1 et 2 représentent un dispositif élévateur relié à la structure d'une plate-forme par l'intermédiaire de moyens élastiques disposés conformément à l'invention selon deux modes de réalisation.Figures 1 and 2 show an elevator device connected to the structure of a platform by means of elastic means arranged in accordance with the invention according to two embodiments.

En référence maintenant aux figures, la référence 1 désigne la structure de la plate-forme. La référence 2 désigne le bâti portant les organes moteurs agissant sur les pignons 3 (au nombre de deux paires dans les exemples représentés). La mise en rotation de ces pignons 3 commande les mouvements relatifs de la crémaillère double 4 soit dans un sens, pour déterminer l'élévation de la plate-forme au-dessus de la surface de la mer lorsque les pieds solidaires de la crémaillère prennent appui sur le 'fond marin, soit dans l'autre sens afin que le relèvement de ces pieds permette la flottaison de la plate-forme. Selon le mode de réalisation représenté figure 1, les moyens élastiques sont disposés entre une semelle oblique 6 ménagée dans un évidement d'un pied 7 solidaire du bâti 2 et une semelle correspondante 8 faisant saillie de la structure de la plate-forme.Referring now to the figures, reference 1 designates the structure of the platform. Reference 2 designates the frame carrying the drive members acting on the pinions 3 (two in number in the examples shown). The rotation of these pinions 3 controls the relative movements of the double rack 4 either in one direction, to determine the elevation of the platform above the surface of the sea when the feet secured to the rack are supported on the seabed, in the other direction so that the lifting of these feet allows the platform to float. According to the embodiment shown in Figure 1, the elastic means are arranged between an oblique sole 6 formed in a recess of a foot 7 secured to the frame 2 and a corresponding sole 8 projecting from the structure of the platform.

Selon le mode de réalisation représenté figure 2, les moyens élastiques amortisseurs 5 sont disposés entre une semelle oblique 6 ménagée sur la partie 9 du bâti 2, prolongé latéralement à cet effet et une semelle correspondante 8 faisant saillie de la structure de la plate-forme.According to the embodiment shown in Figure 2, the elastic damping means 5 are arranged between an oblique sole 6 formed on the part 9 of the frame 2, extended laterally for this purpose and a corresponding sole 8 projecting from the structure of the platform .

Dans les exemples représentés et conformément à l'invention, les axes de compression des moyens élastiques 5 sont inclinés, les semelles 6 et 8 entre lesquels ils sont disposés étant également inclinées par rapport à l'horizontale à cet effet.In the examples shown and in accordance with the invention, the compression axes of the elastic means 5 are inclined, the flanges 6 and 8 between which they are arranged also being inclined relative to the horizontal for this purpose.

De préférence, ces axes de compression passent sensiblement par le centre instantané de rotation de la partie supérieure de la jambe de telle manière que soit supprimée pratiquement toute variation de l'effort de compression appliqué à ces moyens élastiques et que seul l'effort de cisaillement y soit appliqué. Il résulte de cette disposition que la charge appliquée aux dents des pignons reste sensiblement constante quelques soient les mouvements relatifs effectués.Preferably, these compression axes pass substantially through the instantaneous center of rotation of the upper part of the leg so that virtually any variation in the compression force applied to these elastic means is eliminated and that only the shear force be applied to it. It follows from this arrangement that the load applied to the teeth of the pinions remains substantially constant whatever the relative movements carried out.

Bien évidemment, toute modification apportée par l'Homme de l'Art dans le même esprit ne sortirait pas du cadre de la présente invention, notamment en ce qui concerne l'emplacement, l'inclinaison et le nombre des moyens élastiques prévus pour chaque dispositif élévateur.Obviously, any modification made by a person skilled in the art in the same spirit would not depart from the scope of the present invention, in particular as regards the location, the inclination and the number of elastic means provided for each device. elevator.

Claims (4)

1. Dispositif élévateur du type à pignons et crémaillère prévu pour permettre de régler verticalement la position d'une plate-forme marine et de maintenir cette dernière dans la position désirée sur une pluralité de jambes sur chacune desquelles est fixée rigidement au moins une crémaillère double à dentures opposées, à laquelle est associé un dispositif élévateur comprenant au moins une paire de pignons reliés à la structure de la plate-forme, par l'intermédiaire d'un bâti, chacun des dits pignons engrenant respectivement avec l'une des deux dentures de la crémaillère associée, de manière à être situés de part et d'autre de la crémaillère, lesdits pignons étant entraînés en rotation par des moyens moteurs et réducteurs, de manière à déterminer dans un sens ou dans l'autre les mouvements requis, ledit bâti étant fixé à ladite structure par des moyens élastiques autorisant une liberté relative de mouvement entre ces derniers, caractérisé en ce que l'axe de compression des dits moyens élastiques (5) est incliné de manière à déterminer une position oblique des dits moyens.1. Lifting device of the pinion and rack type intended to allow vertical adjustment of the position of a marine platform and of maintaining the latter in the desired position on a plurality of legs on each of which is rigidly fixed at least one double rack with opposite teeth, with which is associated an elevating device comprising at least one pair of pinions connected to the structure of the platform, by means of a frame, each of said pinions meshing respectively with one of the two teeth of the associated rack, so as to be located on either side of the rack, said pinions being driven in rotation by motor and reduction means, so as to determine in one direction or the other the required movements, said frame being fixed to said structure by elastic means allowing relative freedom of movement between them, characterized in that the compression axis of said means el astiques (5) is inclined so as to determine an oblique position of said means. 2. Dispositif selon la revendication 1 caractérisé en ce que l'axe de compression des dits moyens élastiques (5) passe sensiblement par le centre instantané de rotation de la partie supérieure de ladite jambe.2. Device according to claim 1 characterized in that the compression axis of said elastic means (5) passes substantially through the instantaneous center of rotation of the upper part of said leg. 3. Dispositif selon l'une quelconque des revendications 1 et 2 caractérisé en ce que lesdits moyens élastiques (5) sont disposés entre une semelle oblique (6) ménagée dans un évidement d'un pied (7) solidaire dudit bâti (2) et une semelle correspondante (8) faisant saillie de ladite structure (1).3. Device according to any one of claims 1 and 2 characterized in that said elastic means (5) are arranged between an oblique sole (6) formed in a recess of a foot (7) integral with said frame (2) and a corresponding sole (8) projecting from said structure (1). 4. Dispositif selon l'une quelconque des revendications 1 et 2 caractérisé en ce que lesdits moyens élastiques (5) sont disposés entre une semelle oblique (6) ménagée sur une partie (9) du bâti (2) prolongé à cet effet et'une semelle correspondante (8) faisant saillie de ladite structure (1)4. Device according to any one of claims 1 and 2 characterized in that said elastic means (5) are arranged between an oblique sole (6) formed on a part (9) of the frame (2) extended for this purpose and ' a corresponding sole (8) projecting from said structure (1)
EP81402058A 1980-12-31 1981-12-23 Elastic means for an elevating device for an offshore platform Expired EP0056551B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81402058T ATE11944T1 (en) 1980-12-31 1981-12-23 ELASTIC MEANS FOR A MECHANICAL LIFTING DEVICE OF AN OFFSHORE PLATFORM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8027914A FR2497248A1 (en) 1980-12-31 1980-12-31 ELASTIC MEANS FOR A MARINE PLATFORM MECHANICAL ELEVATOR DEVICE
FR8027914 1980-12-31

Publications (2)

Publication Number Publication Date
EP0056551A1 true EP0056551A1 (en) 1982-07-28
EP0056551B1 EP0056551B1 (en) 1985-02-20

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EP81402058A Expired EP0056551B1 (en) 1980-12-31 1981-12-23 Elastic means for an elevating device for an offshore platform

Country Status (7)

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US (1) US4443000A (en)
EP (1) EP0056551B1 (en)
JP (1) JPS57133917A (en)
AT (1) ATE11944T1 (en)
DE (1) DE3169124D1 (en)
FR (1) FR2497248A1 (en)
NO (1) NO151937C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520868A1 (en) * 1982-02-01 1983-08-05 Brissonneau & Lotz DEVICE FOR THE MEASUREMENT OF LOADS APPLIED TO THE BATIS OF LIFTING MECHANISMS OF MARINE PLATFORMS
FR2759400A1 (en) * 1997-02-07 1998-08-14 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

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CA2000132C (en) * 1988-10-12 2000-08-01 Danilo P. Buan Improved platen module
US6523647B2 (en) * 2001-05-21 2003-02-25 Hydro Mobile Inc. Elevating platform assembly
US7334305B2 (en) * 2003-12-12 2008-02-26 S&S Cycle, Inc. Bearing and seal installation device and method
FR2881413B1 (en) * 2005-01-28 2008-02-29 Hydralift Blm Sa DEVICE FOR MANEUVERING A STRUCTURE IN ELEVATION OR LOWERING
DE102007034049B3 (en) * 2007-07-19 2008-06-12 Hoerbiger Automatisierungstechnik Holding Gmbh Piezoelectric valve has stop provided outside annular face formed by abutting first and second sealing structures and in closed position of flexible element limits deformation of second sealing structure in region of sealing face
BE1019907A4 (en) * 2011-04-18 2013-02-05 Geosea N V AVAILABLE OFFSHORE PLATFORM AND METHOD FOR SUPPRESSING LATERAL OSCILLATING MOVEMENTS.
US9145956B2 (en) 2013-01-25 2015-09-29 Gustomsc Resources B.V. Torque sharing drive and torque sharing process
US9531237B2 (en) 2013-12-19 2016-12-27 Gustomsc Resources B.V. Dual rack output pinion drive
CN103850236B (en) * 2014-01-21 2015-11-04 武汉船用机械有限责任公司 Pinion and-rack platform hoist system

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US3606251A (en) * 1969-11-14 1971-09-20 Armco Steel Corp Leg supported offshore structure with jacking apparatus
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FR2383118A1 (en) * 1977-03-10 1978-10-06 Metalliques Entrepr Cie Fse Assembly for installation of offshore oil drilling rig - has screw jacks enabling positioning of piles relative to platform and includes shock absorbers
FR2411270A1 (en) * 1977-12-09 1979-07-06 Stevin Baggeren Bv PLATFORM DESIGNED TO REST ON A SEA BOTTOM AND EQUIPPED WITH SHOCK ABSORBERS
FR2436099A1 (en) * 1978-09-14 1980-04-11 Brissonneau & Lotz Lifting mechanism for offshore oil drilling platform - has elastic abutments to ensure equal share of load to each driving pinion

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1089669A (en) * 1965-08-06 1967-11-01 American Mach & Foundry Jacking system for off-shore platforms
US3606251A (en) * 1969-11-14 1971-09-20 Armco Steel Corp Leg supported offshore structure with jacking apparatus
US3967457A (en) * 1974-07-11 1976-07-06 Engineering Technology Analysts, Inc. Self-elevating offshore drilling unit legs
FR2383118A1 (en) * 1977-03-10 1978-10-06 Metalliques Entrepr Cie Fse Assembly for installation of offshore oil drilling rig - has screw jacks enabling positioning of piles relative to platform and includes shock absorbers
FR2411270A1 (en) * 1977-12-09 1979-07-06 Stevin Baggeren Bv PLATFORM DESIGNED TO REST ON A SEA BOTTOM AND EQUIPPED WITH SHOCK ABSORBERS
FR2436099A1 (en) * 1978-09-14 1980-04-11 Brissonneau & Lotz Lifting mechanism for offshore oil drilling platform - has elastic abutments to ensure equal share of load to each driving pinion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520868A1 (en) * 1982-02-01 1983-08-05 Brissonneau & Lotz DEVICE FOR THE MEASUREMENT OF LOADS APPLIED TO THE BATIS OF LIFTING MECHANISMS OF MARINE PLATFORMS
US4495824A (en) * 1982-02-01 1985-01-29 Brissonneau Et Lotz Marine Means of measuring stress affecting mountings for jacking mechanisms on ocean platforms
FR2759400A1 (en) * 1997-02-07 1998-08-14 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

Also Published As

Publication number Publication date
ATE11944T1 (en) 1985-03-15
EP0056551B1 (en) 1985-02-20
NO814478L (en) 1982-07-01
JPS57133917A (en) 1982-08-18
NO151937C (en) 1985-07-03
FR2497248A1 (en) 1982-07-02
NO151937B (en) 1985-03-25
US4443000A (en) 1984-04-17
DE3169124D1 (en) 1985-03-28
FR2497248B1 (en) 1983-11-10

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