EP0054498A1 - Installation for dredging a sea bottom, particularly for great depths - Google Patents

Installation for dredging a sea bottom, particularly for great depths Download PDF

Info

Publication number
EP0054498A1
EP0054498A1 EP81402003A EP81402003A EP0054498A1 EP 0054498 A1 EP0054498 A1 EP 0054498A1 EP 81402003 A EP81402003 A EP 81402003A EP 81402003 A EP81402003 A EP 81402003A EP 0054498 A1 EP0054498 A1 EP 0054498A1
Authority
EP
European Patent Office
Prior art keywords
arm
working head
anchoring device
installation according
carriage
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
EP81402003A
Other languages
German (de)
French (fr)
Other versions
EP0054498B1 (en
Inventor
Jacques Oules
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.)
Hydroconsult SA
Original Assignee
Hydroconsult SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydroconsult SA filed Critical Hydroconsult SA
Publication of EP0054498A1 publication Critical patent/EP0054498A1/en
Application granted granted Critical
Publication of EP0054498B1 publication Critical patent/EP0054498B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/06—Floating substructures as supports
    • E02F9/062—Advancing equipment, e.g. spuds for floating dredgers
    • E02F9/065—Advancing equipment, e.g. spuds for floating dredgers characterised by the use of lines with anchors and winches
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/905—Manipulating or supporting suction pipes or ladders; Mechanical supports or floaters therefor; pipe joints for suction pipes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
    • E02F3/9225—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with rotating cutting elements
    • E02F3/9237—Suction wheels with axis of rotation in transverse direction of the longitudinal axis of the suction pipe

Definitions

  • the present invention relates to an installation for dredging a seabed, for example for carrying out underwater earthworks or for extracting ores at great depths.
  • the working head which is in contact with the seabed is mounted on one end of a rigid arm, the other end of which is articulated to the hull of a floating body, such as a ship, pivotally about a horizontal axis.
  • the working head is able to carry out dredging passes on the seabed having a trajectory in the form of an arc of a circle, under the control of two butterfly cables which are anchored to the seabed in places located on either side of the working head and pass through means fixed to the working head to come and wind on two winch mounted on the floating body and actuable in the direction of reverse rotation.
  • the positioning and advancement of the installation are generally carried out using two vertical anchoring piles mounted vertically mobile at the ends of the floating body. Advancement installation is done by pivoting the floating body around one of the two piles which is driven into the seabed, while the other pile is raised.
  • the object of the present invention is to propose a dredging installation which no longer has the drawbacks mentioned.
  • the installation for dredging according to the present invention is characterized in that said arm carrying the working head is mounted on a support which is vertically movable on the anchoring device, at least in the lower part of the latter, between a working position in which the arm forms a relatively small angle with the anchoring device and a position in which it is appreciably parallel to the bottom.
  • auxiliary anchoring device vertically movable between a position pressed into the seabed and a position released from this bottom, the auxiliary device being located offset in the direction of widening of the abovementioned annular sector, from the above-mentioned anchoring device a variable distance.
  • the dredging installation comprises a floating body 1, such as a ship in form of a catamaran, an anchoring device for the ship, produced in the form of a vertical stake 2 and a rigid arm 3 which carries at one end a working head 4 and is articulated by its other end to a support in form of a carriage 5 mounted vertically movable along the anchor pile 20
  • the arm 3 is connected to the support carriage 5 by an articulation having a horizontal axis 7.
  • the carriage is provided with a set of pinions 8 driven by a motor 9 and each meshing with a rack 10 extending along the stake 2.
  • the latter may be provided with laterally projecting flanges 11 behind which engage appropriate retaining members 12 associated with the carriage and which comprise for example rollers intended to come into rolling contact with the rear face of the flanges 110
  • the dredging installation comprises an auxiliary vertical pile 13 which is connected by a connecting device in the form of a parallelogram 14 to a carriage 15 mounted vertically movable along the pile 2 in the same manner as the carriage 5 In the figures, only the carriage drive motor 15 and the rack are shown at 9 'and 10'0.
  • This auxiliary pile 13 is further equipped with means allowing a pivoting movement in a vertical plane around the articulation connection. from the parallelogram 14 to the carriage 15.
  • the connection between the parallelogram 14 and the auxiliary pile 13 also allows a pivoting movement relative of these two pieces.
  • the means for controlling the pivoting movement of the pile 13 are formed by a cable 17 fixed at one end to the pile and winding at its other end on a winch 18 mounted on the ship 1.
  • the auxiliary pile 13 is situated substantially in the vertical plane in which the anchor pile 2 and the arm 3 are located with the work head 4, but, with respect to the pile 2, on the side opposite to that of the work head 4.
  • the installation comprises a cable 19 which is wound on a winch 20 on board the ship 1 and is fixed at 21 to the end of the arm 3, on which the working head is mounted 4. Thanks to this cable 19, the arm 3 can pivot vertically around its horizontal pivot axis 7. from its articulation to the support carriage 5.
  • the device ensuring the pivoting of the arm 3 around the vertical axis comprises two cables fluttering 22. anchored at 23 to the seabed 16 on either side of the arm 3. Each cable 22 passes over a pulley 24. fixed to the lower or free end of the arm 3 and is wound on a winch 25 mounted on the ship 1, passing over another return pulley 26 provided in the upper part of the arm 3.
  • the anchor pile 2 is mounted at 34 on the ship 1, vertically sliding between an anchor position in which its lower end is pressed into the seabed (FIG. 1) and a raised underwater bottom release position (Figure 3).
  • the auxiliary pile 13 is also likely to be driven into the seabed or to assume a raised position.
  • the working head 4 can be produced in the form of a suction head whether or not equipped with a cutting tool such as a shovel wheel 27 which can be held in position by a jack 28.
  • a suction pump 29 mounted inside the arm 3 and which delivers the materials sucked through a transfer pipe 30 of these materials to a storage location, not shown.
  • the motors 9 and 9 'intended for the movement of the carriages 5 and 15 and the suction and discharge pump 29 as well as the actuator 28 can be remote-controlled, for example from the vessel 1, in any case appropriate and known.
  • the dredging installation according to the invention operates as follows:
  • Figure 1 shows the installation in a fixed working position.
  • the tip of the anchoring stake 2 is driven into the seabed 16.
  • the carriage 5 to which the arm 3 carrying the working head 4 is articulated is in its high position.
  • the carriage is kept in this position for the entire duration of a dredging pass carried out by the working head 4.
  • the trajectory of this dredging pass is in the form of an arc of a circle represented at 31 in FIG. 2. This sweeping movement of the head 4 along the circular arc 31 is controlled using the two winches 25 and the two butterfly cables 22.
  • the bucket wheel 27 of the working head 4 can be advanced to the line 32 representing the trajec-- b ire of the pass following dredged without it being necessary to move the vessel 1. For this, it suffices to move the carriage 5 downwards, to which the arm 3 carrying the working head 4 is articulated, at an appropriate distance. In fact, any vertical movement of the carriage 5 causes movement of the shovel wheel 27 on the seabed, forwards or backwards in the direction of movement of the carriage 5, since the anchoring stake 2 is kept fixed and the shovel wheel 27 is in contact with the seabed 16.
  • the upward movement of the carriage 5 causes the desired advancement of the ship 1. Simultaneously the butterfly cables 22 are kept taut to prevent the working head 4 does not slip on the bottom and moves backwards. Since the auxiliary pile 13 remains in its depressed position in the bottom 16 during the whole operation of advancing the ship 1, the latter is always anchored to the seabed and the advancement operation is perfectly controllable.
  • the dredging installation according to the invention makes it possible to work on the bottom marine at depths up to 100 meters and even more and sweeping by successive parallel passes without changing the working position of the installation, and this in particular thanks to the articulation of the support arm of the working head at a motor carriage movable along the anchor pile 2 to the seabed 16.
  • the embodiment which has just been described and which is shown in the figures has been given by way of example only. Of course, many variants can be made to this embodiment.
  • the configuration and mounting of the two carriages on the main anchor pile 2 can be different and of any suitable nature known to those skilled in the art.
  • the working head is also not limited to the structure described and shown.
  • the ship can be equipped with an autonomous or additional propellant device to facilitate the advancement maneuver.
  • the anchoring stake can be produced in any suitable form and have a cross section of any suitable form.
  • the extreme part of the pile which is intended to be inserted into the seabed, is advantageously made in the form of a separate body mounted to rotate and, if necessary, vertically movable in the pile.
  • the pile can be made up of a multitude of assemblable sections so that it is adaptable to the depth of the seabed.
  • the invention includes all the means constituting technical equivalents of the means described, as well as their combinations, if these are executed according to the spirit and implemented in the context of protection as claimed.

Abstract

Selon l'invention une tête de travail (4) qui est en contact avec le fond sous-marin (16) et montée à une extrémité d'un bras (3) articulé par son autre extrémité à un chariot (5) monté déplaçable le long d'un pieu (2) vertical disposé de façon coulissante dans un corps flottant est amenée à balayer un secteur annulaire par une multitude de passes parallèles successives sans modification de la position de travail du corps flottant (1). L'invention est particulièrement utilisable pour le dragage en grande profondeur.According to the invention a working head (4) which is in contact with the seabed (16) and mounted at one end of an arm (3) articulated by its other end to a carriage (5) mounted movable the along a vertical stake (2) slidably disposed in a floating body is caused to sweep an annular sector by a multitude of successive parallel passes without modification of the working position of the floating body (1). The invention is particularly usable for dredging at great depth.

Description

La présente invention concerne une installation pour le dragage d'un fond sous-marin, par exemple pour la réalisation des terrassements sous-marins ou pour l'extraction des minerais à grande profondeur.The present invention relates to an installation for dredging a seabed, for example for carrying out underwater earthworks or for extracting ores at great depths.

Dans les installations de dragage connues, en particulier dans les installations de dragage par aspiration, la tête de travail qui est en contact avec le fond sous-marin est montée sur une extrémité d'un bras rigide dont l'autre extrémité est articulée à la coque d'un corps flottant, tel qu'un navire, de façon pivotante autour d'un axe horizontal. La tête de travail est en mesure d'effectuer sur le fond sous-marin des passes de dragage ayant une trajectoire en forme d'un arc de cercle, sous la commande de deux câbles de papillonnage qui sont ancrées au fond marin à des endroits situés de part et d'autre de la tête de travail et passent par des moyens fixés à la tête de travail pour venir s'enrouler sur deux treuil montés sur le corps flottant et actionnables en sens.de rotation inverse. Le positionnement et l'avancement de l'installation s'effectuent en général à l'aide de deux pieux d'ancrage verticaux montés verticalement mobiles aux extrémités du corps flottant. L'avancement de l'installation se fait par pivotement du corps flottant autour de l'un des deux pieux qui est enfoncé dans le fond sous-marin, tandis que l'autre pieu est soulevé.In known dredging installations, in particular in suction dredging installations, the working head which is in contact with the seabed is mounted on one end of a rigid arm, the other end of which is articulated to the hull of a floating body, such as a ship, pivotally about a horizontal axis. The working head is able to carry out dredging passes on the seabed having a trajectory in the form of an arc of a circle, under the control of two butterfly cables which are anchored to the seabed in places located on either side of the working head and pass through means fixed to the working head to come and wind on two winch mounted on the floating body and actuable in the direction of reverse rotation. The positioning and advancement of the installation are generally carried out using two vertical anchoring piles mounted vertically mobile at the ends of the floating body. Advancement installation is done by pivoting the floating body around one of the two piles which is driven into the seabed, while the other pile is raised.

Une telle installation présente des inconvénients considérables. Etant donné que le brasporteur de travail est articulé directement à la coque du corps flottant, cette installation ne permet pas un dragage en grande profondeur et son installation est pratiquement limitée à des profondeurs de l'ordre de 20 mètres. Du fait de l'articulation du bras à un endroit fixe du corps flottant, la tête de travail ne peut effectuer qu'une seule passe de dragage pour une position fixe de l'installation. Il est évident que l'obligation d'avancer l'installation à l'aide des deux pieux, après chaque passe de dragage, constitue une contrainte extrêmement gênante.Such an installation has considerable drawbacks. Since the working arm is articulated directly to the hull of the floating body, this installation does not allow dredging at great depth and its installation is practically limited to depths of the order of 20 meters. Due to the articulation of the arm at a fixed location on the floating body, the working head can only make one dredging pass for a fixed position of the installation. It is obvious that the obligation to advance the installation using the two piles, after each dredging pass, constitutes an extremely troublesome constraint.

La présente invention a pour objectif de proposer une installation de dragage qui ne présente plus les inconvénients mentionnés.The object of the present invention is to propose a dredging installation which no longer has the drawbacks mentioned.

A cet effet, l'installation pour le dragage suivant la présente invention est caractérisée en ce que ledit bras porteur de la tête de travail est monté sur un support qui est verticalement déplaçable sur le dispositif d'ancrage, au moins dans la partie inférieure de celui-ci, entre une position de travail dans laquelle le bras forme un angle relativement faible avec le dispositif d'ancrage et une position dans laquelle il est sentiblement parallèle au fond.For this purpose, the installation for dredging according to the present invention is characterized in that said arm carrying the working head is mounted on a support which is vertically movable on the anchoring device, at least in the lower part of the latter, between a working position in which the arm forms a relatively small angle with the anchoring device and a position in which it is appreciably parallel to the bottom.

Suivant une caractéristique avantageuse de l'installation selon l'invention, celle-ci comprend un dispositif d'ancrage auxiliaire verticalement mobile entre une position enfoncée dans le fond sous-marin et une position dégagée de ce fond, le dispositif auxiliaire étant situé décalé dans la direction d'élargissement du secteur annulaire précité, du dispositif d'ancrage précité, suivant une distance variable.According to an advantageous characteristic of the installation according to the invention, it comprises a auxiliary anchoring device vertically movable between a position pressed into the seabed and a position released from this bottom, the auxiliary device being located offset in the direction of widening of the abovementioned annular sector, from the above-mentioned anchoring device a variable distance.

L'invention sera mieux comprise et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement au cours de la description explicative qui va suivre faite en référence aux dessins schématiques annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention et dans lesquels :

  • La figure 1 est une vue en élévation de l'installation de dragage selon l'invention, dans sa position de travail.
  • La figure 2 est une vue de dessus avec arrachement partiel, de l'installation de dragage suivant la figure 1.
  • La figure 3 montre l'installation suivant l'invention pendant son avancement vers une nouvelle position de travail, en une vue en élévation; et
  • La figure 4 est une vue en coupe schématique et à plus grande échelle, suivant la direction IV-IV de la figure 3.
The invention will be better understood and other objects, characteristics, details and advantages thereof will appear more clearly during the explanatory description which follows, made with reference to the appended schematic drawings given solely by way of example illustrating a mode of the invention and in which:
  • Figure 1 is an elevational view of the dredging installation according to the invention, in its working position.
  • FIG. 2 is a top view, partially broken away, of the dredging installation according to FIG. 1.
  • Figure 3 shows the installation according to the invention during its advancement to a new working position, in an elevation view; and
  • FIG. 4 is a schematic sectional view on a larger scale, in the direction IV-IV of FIG. 3.

Suivant le mode de réalisation de l'invention, représenté sur les figures, l'installation de dragage comprend un corps flottant 1, tel qu'un navire en forme d'un catamaran, un dispositif d'ancrage pour le navire, réalisé sous forme d'un pieu vertical 2 et un bras rigide 3 qui porte à une extrémité une tête de travail 4 et est articulé par son autre extrémité à un support en forme d'un chariot 5 monté verticalement mobile le long du pieu d'ancrage 20According to the embodiment of the invention, shown in the figures, the dredging installation comprises a floating body 1, such as a ship in form of a catamaran, an anchoring device for the ship, produced in the form of a vertical stake 2 and a rigid arm 3 which carries at one end a working head 4 and is articulated by its other end to a support in form of a carriage 5 mounted vertically movable along the anchor pile 20

Comme il est illustré à la figure 4 de façon schématique, le bras 3 est relié au chariot de support 5 par une articulation présentant un axe horizontal 7.As illustrated in FIG. 4 schematically, the arm 3 is connected to the support carriage 5 by an articulation having a horizontal axis 7.

Pour assurer son déplacement le long du pieu d'ancrage 2, le chariot est pourvu d'un jeu de pignons 8 entraîné par un moteur 9 et engrenant chacun une crémaillère 10 s'étendant le long du pieu 2. Pour assurer la retenue du chariot sur le pieu, ce dernier peut être pourvu de rebords latéralement saillants 11 derrière lesquels viennent en prise des organes de retenue appropriés 12 associés au chariot et qui comprennent par exemple des galets destinés à venir en contact roulant avec la face arrière des rebords 110To ensure its movement along the anchoring stake 2, the carriage is provided with a set of pinions 8 driven by a motor 9 and each meshing with a rack 10 extending along the stake 2. To ensure the retention of the carriage on the pile, the latter may be provided with laterally projecting flanges 11 behind which engage appropriate retaining members 12 associated with the carriage and which comprise for example rollers intended to come into rolling contact with the rear face of the flanges 110

L'installation de dragage selon l'invention comprend un pieu vertical auxiliaire 13 qui est relié par un dispositif de liaison en forme d'un parallèlogramme 14 à un chariot 15 monté verticalement mobile le long du pieu 2 de la même manière que le chariot 5. Sur les figures seuls le moteur d'entraînement du chariot 15 et la crémaillère sont représentés en 9' et 10'0 Ce pieu auxiliaire 13 est en outre équipé de moyens permettant un mouvement de pivotement dans un plan vertical autour de la liaison par articulation du parallèlogramme 14 au chariot 15. Bien entendu la liaison entre le parallèlogramme 14 et le pieu auxiliaire 13 permet également un mouvement de pivotement relatif de ces deux pièces. Les moyens de commande du mouvement de pivotement du pieu 13 sont formés par un câble 17 fixé à une extrémité au pieu et s'enroulant a son autre extrémité sur un treuil 18 monté sur le navire 1. Il est encore à noter que le pieu auxiliaire 13 est situé sensiblement dans le plan vertical dans lequel se trouvent le pieu d'ancrage 2 et le bras 3 avec la tête de travail 4, mais,par rapport au pieu 2, du côté opposé à celui de la tête de travail 4.The dredging installation according to the invention comprises an auxiliary vertical pile 13 which is connected by a connecting device in the form of a parallelogram 14 to a carriage 15 mounted vertically movable along the pile 2 in the same manner as the carriage 5 In the figures, only the carriage drive motor 15 and the rack are shown at 9 'and 10'0. This auxiliary pile 13 is further equipped with means allowing a pivoting movement in a vertical plane around the articulation connection. from the parallelogram 14 to the carriage 15. Of course the connection between the parallelogram 14 and the auxiliary pile 13 also allows a pivoting movement relative of these two pieces. The means for controlling the pivoting movement of the pile 13 are formed by a cable 17 fixed at one end to the pile and winding at its other end on a winch 18 mounted on the ship 1. It should also be noted that the auxiliary pile 13 is situated substantially in the vertical plane in which the anchor pile 2 and the arm 3 are located with the work head 4, but, with respect to the pile 2, on the side opposite to that of the work head 4.

Pour la commande de la tête de travail 4, l'installation comprend un câble 19 qui est enroulé sur un treuil 20 à bord du navire 1 et est fixé en 21 à l'extrémité du bras 3, sur laquelle est montée la tête de travail 4. Grâce à ce câble 19, le bras 3 peut pivoter verticalement autour de son axe de pivotement horizontal 7. de son articulation au chariot de support 5. Le dispositif assurant le pivotement du bras 3 autour de l'axe vertical comprend deux câbles de papillonnage 22. ancrés en 23 au fond sous-marin 16 de part et d'autre du bras 3. Chaque câble 22 passe sur une poulie 24 . fixée à l'extrémité inférieure ou libre du bras 3 et vient s'enrouler sur un treuil 25 monté sur le navire 1, en passant sur une autre poulie de renvoi 26 prévue dans la partie supérieure du bras 3.For the control of the working head 4, the installation comprises a cable 19 which is wound on a winch 20 on board the ship 1 and is fixed at 21 to the end of the arm 3, on which the working head is mounted 4. Thanks to this cable 19, the arm 3 can pivot vertically around its horizontal pivot axis 7. from its articulation to the support carriage 5. The device ensuring the pivoting of the arm 3 around the vertical axis comprises two cables fluttering 22. anchored at 23 to the seabed 16 on either side of the arm 3. Each cable 22 passes over a pulley 24. fixed to the lower or free end of the arm 3 and is wound on a winch 25 mounted on the ship 1, passing over another return pulley 26 provided in the upper part of the arm 3.

Comme il ressort notamment des figures 1 et 3, le pieu d'ancrage 2 est monté en 34 sur le navire 1, verticalement coulissant entre une position d'ancrage dans laquelle son extrémité inférieure est enfoncée dans le fond marin (figure 1) et une position soulevée de dégagement du fond sous-marin (figure 3). Le pieu auxiliaire 13 est également susceptible d'être enfoncé dans le fond marin ou de prendre une position soulevée.As is apparent in particular from FIGS. 1 and 3, the anchor pile 2 is mounted at 34 on the ship 1, vertically sliding between an anchor position in which its lower end is pressed into the seabed (FIG. 1) and a raised underwater bottom release position (Figure 3). The auxiliary pile 13 is also likely to be driven into the seabed or to assume a raised position.

Il est encore à noter que la tête de travail 4 peut être réalisée sous forme d'une tête d'aspiration équipée ou non d'un outil de coupe tel qu'une roue-pelle 27 pouvant être maintenue en position par un vérin 28. A la tête d'aspiration est associée une pompe aspirante 29 montée à l'intérieur du bras 3 et qui refoule les matériaux aspirés à travers une conduite de transfert 30 de ces matériaux vers un lieu de stockage non représenté.It should also be noted that the working head 4 can be produced in the form of a suction head whether or not equipped with a cutting tool such as a shovel wheel 27 which can be held in position by a jack 28. Associated with the suction head is a suction pump 29 mounted inside the arm 3 and which delivers the materials sucked through a transfer pipe 30 of these materials to a storage location, not shown.

Il convient encore de souligner que les moteurs 9 et 9' destinés au déplacement des chariots 5 et 15 et la pompe d'aspiration et de refoulement 29 ainsi que le vérin 28 peuvent être télécommandés, par exemple à partir du navire 1, de toute manière appropriée et connue.It should also be emphasized that the motors 9 and 9 'intended for the movement of the carriages 5 and 15 and the suction and discharge pump 29 as well as the actuator 28 can be remote-controlled, for example from the vessel 1, in any case appropriate and known.

L'installation de dragage selon l'invention fonctionne de la façon suivante :The dredging installation according to the invention operates as follows:

La figure 1 montre l'installation dans une position fixe de travail. La pointe du pieu d'ancrage 2 est enfoncée dans le fond sous-marin 16. Le chariot 5 auquel est articulé le bras 3 porteur de la tête en travail 4 se trouve dans sa position haute. Le chariot est maintenu dans cette position pendant toute la durée d'une passe de dragage effectuée par la tête de travail 4. La trajectoire de cette passe de dragage est en forme d'un arc de cercle représenté en 31 sur la figure 2. Ce mouvement de balayage de la tête 4 suivant l'arc de cercle 31 est commandé à l'aide des deux treuils 25 et des deux câbles de papillonnage 22. Suivant la direction désirée du mouvement de balayage au cours de la passe de dragage, on enroule l'un des deux câbles 22 sur un treuil 25et relâche l'autre câble en faisant tourner son treuil dans le sens de rotation inverse, de façon synchrone avec la rotation du treuil 25 fonctionnant dans le sens d'un enroulement de son câble.Figure 1 shows the installation in a fixed working position. The tip of the anchoring stake 2 is driven into the seabed 16. The carriage 5 to which the arm 3 carrying the working head 4 is articulated is in its high position. The carriage is kept in this position for the entire duration of a dredging pass carried out by the working head 4. The trajectory of this dredging pass is in the form of an arc of a circle represented at 31 in FIG. 2. This sweeping movement of the head 4 along the circular arc 31 is controlled using the two winches 25 and the two butterfly cables 22. According to the desired direction of the sweeping movement during the dredging pass, it is wound one of the two cables 22 on a winch 25 and releases the other cable by rotating its winch in the opposite direction of rotation, synchronously with the rotation of the winch operating in the direction of winding its cable.

Après accomplissement de la passe de dragage 31, la roue-pelle 27 de la tête de travail 4 peut être avancée jusqu'à la ligne 32 représentant la trajec--bire de la passe de dragage suivante, sans qu'il soit nécessaire de déplacer le navire 1. Il suffit pour cela de déplacer vers le bas le chariot 5 auquel est articulé le bras 3 porteur de la tête de travail 4, suivant une distance appropriée. En effet, tout déplacement vertical du chariot 5 entraîne un mouvement de la roue-pelle 27 sur le fond marin, en avant ou en arrière selon la direction du déplacement du chariot 5, étant donné que le pieu d'ancrage 2 est maintenu fixe et la roue-pelle 27 est en contact avec le fond marin 16. L'opération d'avancement de la roue 27 terminée, on immobilise le chariot 5 et amène la tête de travail 4 à effectuer la passe de dragage suivant l'arc de cercle 32 à l'aide des treuils 25 et des câbles 22. On comprend aisément que la tête de travail 4 peut ainsi balayer par passes parallèles successives un secteur annulaire 33 (figure 2). La limite du balayage par passes parallèles successives sans changement de position du navire 1 est atteint lorsque le chariot 5 se trouve dans la position représentée en lignes fantômes sur la figure 1, dans laquelle le bras 3 s'étend horizontalement. La position exacte de la roue-pelle 27 peut être réglée au moyen de son vérin 28.After completion of the dredging pass 31, the bucket wheel 27 of the working head 4 can be advanced to the line 32 representing the trajec-- b ire of the pass following dredged without it being necessary to move the vessel 1. For this, it suffices to move the carriage 5 downwards, to which the arm 3 carrying the working head 4 is articulated, at an appropriate distance. In fact, any vertical movement of the carriage 5 causes movement of the shovel wheel 27 on the seabed, forwards or backwards in the direction of movement of the carriage 5, since the anchoring stake 2 is kept fixed and the shovel wheel 27 is in contact with the seabed 16. The operation of advancing the wheel 27 is completed, the carriage 5 is immobilized and the working head 4 is brought to carry out the dredging pass in the arc of a circle 32 using the winches 25 and the cables 22. It is easily understood that the working head 4 can thus sweep by successive parallel passes an annular sector 33 (FIG. 2). The limit of scanning by successive parallel passes without changing the position of the vessel 1 is reached when the carriage 5 is in the position shown in phantom lines in FIG. 1, in which the arm 3 extends horizontally. The exact position of the shovel wheel 27 can be adjusted by means of its jack 28.

Ce n'est qu'après le balayage du secteur annulaire 33 (figure 2) que le navire doit être avancé vers sa prochaine position fixe de travail. La tête de travail 4, avec sa roue-pelle 27, reste posée sur le fond 16 et constitue un point fixe, en raison de son poids. Le pieu auxiliaire 13 est descendu par déplacement de son chariot de support 15 vers le bas, le long du pieu d'ancrage 2, et fiché dans le fond sous-marin 16. Ensuite, le pieu d'ancrage 2 est soulevé hors du fond 16. Puis on remonte le chariot 5 auquel est articulé le bras 3 porteur de la tête de travail 4, grâce au moteur 9 du chariot par exemple jusqu'à ce que l'angle ot est formé entre les axes du pieu 2 et du bras 3 atteigne une valeur d'environ 45°. Du fait de l'immobilité de la lourde tête de travail 4 sur le fond marin 16, le mouvement ascendant du chariot 5 provoque l'avancement voulu du navire 1. Simultanément les câbles de papillonnage 22 sont maintenus tendus pour éviter que la tête de travail 4 ne dérape sur le fond et se déplace vers l'arrière. Etant donné que le pieu auxiliaire 13 reste dans sa position enfoncée dans le fond 16 pendant toute l'opération d'avancement du navire 1, ce dernier est toujours ancré au fond sous-marin et l'opération d'avancement est parfaitement contrôlable.It is only after scanning the annular sector 33 (FIG. 2) that the ship must be advanced towards its next fixed working position. The working head 4, with its shovel wheel 27, remains placed on the bottom 16 and constitutes a fixed point, because of its weight. The auxiliary pile 13 is lowered by displacement of its support carriage 15 downwards, along the anchor pile 2, and inserted into the seabed 16. Then, the anchor pile 2 is lifted out of the bottom 16. Then the carriage 5 is raised to which the arm 3 carrying the working head 4 is articulated, by means of the motor 9 of the carriage for example until the angle ot is formed between the axes of the pile 2 and of the arm 3 reaches a value of approximately 45 °. Due to the immobility of the heavy working head 4 on the seabed 16, the upward movement of the carriage 5 causes the desired advancement of the ship 1. Simultaneously the butterfly cables 22 are kept taut to prevent the working head 4 does not slip on the bottom and moves backwards. Since the auxiliary pile 13 remains in its depressed position in the bottom 16 during the whole operation of advancing the ship 1, the latter is always anchored to the seabed and the advancement operation is perfectly controllable.

Lorsque le navire est arrivé dans sa nouvelle position fixe de travail, le pieu d'ancrage 2 est à nouveau fiché dans le fond et le pieu auxiliaire 13 soulevé à l'aide de son câble 17 et du treuil 18. Puis on remonte le chariot 15 le long du pieu 2 jusqu'à ce que lé pieu auxiliaire 13 revienne dans sa position représentée sur la figure 1. L'opération d'avancement est ainsi terminée, et une nouvelle opération de dragage peut commencer.When the ship has arrived in its new fixed working position, the anchor stake 2 is again stuck in the bottom and the auxiliary stake 13 raised using its cable 17 and the winch 18. Then the carriage is reassembled 15 along the pile 2 until the auxiliary pile 13 returns to the position shown in FIG. 1. The advancement operation is thus ended, and a new dredging operation can begin.

On comprend aisément que l'installation de dragage selon l'invention permet de travailler sur le fond marin à des profondeurs jusqu'à 100 mètres et même plus et le balayage par passes parallèles successives sans changement de là position de travail de l'installation, et ceci notamment grâce à l'articulation du bras-porteur de la tête de travail à un chariot moteur déplaçable le long du pieu d'ancrage 2 jusqu'au fond sous-marin 16.It is easily understood that the dredging installation according to the invention makes it possible to work on the bottom marine at depths up to 100 meters and even more and sweeping by successive parallel passes without changing the working position of the installation, and this in particular thanks to the articulation of the support arm of the working head at a motor carriage movable along the anchor pile 2 to the seabed 16.

Le mode de réalisation qui vient d'être décrit et qui est représenté sur les figures n'a été donné qu'à titre d'exemple. Bien entendu de nombreuses variantes peuvent être apportées à ce mode de réalisation. La configuration et le montage des deux chariots sur le pieu d'ancrage principal 2 peuvent êtredifférents et de toute nature appropriée connue à l'homme du métier. La tête de travail n'est également pas limitée à la structure décrite et représentée. Le navire peut être équipé d'un dispositif propulseur autonome ou sppplé- mentaire pour faciliter la manoeuvre de l'avancement. Il est encore à noter que le pieu d'ancrage peut être réalisé sous toutes'formes appropriées et avoir une section transversale de toute forme appropriée.The embodiment which has just been described and which is shown in the figures has been given by way of example only. Of course, many variants can be made to this embodiment. The configuration and mounting of the two carriages on the main anchor pile 2 can be different and of any suitable nature known to those skilled in the art. The working head is also not limited to the structure described and shown. The ship can be equipped with an autonomous or additional propellant device to facilitate the advancement maneuver. It should also be noted that the anchoring stake can be produced in any suitable form and have a cross section of any suitable form.

La partie extrême du pieu, qui est destinée à être fichée dans le fond sous-marin est avantageusement réalisée sous forme d'un corps séparé monté rotatif et, le cas échéant, verticalement déplaçable dans le pieu.The extreme part of the pile, which is intended to be inserted into the seabed, is advantageously made in the form of a separate body mounted to rotate and, if necessary, vertically movable in the pile.

Le pieu peut être composé d'une multitude de sections assemblables pour qu'il soit adaptable à la profondeur du fond sous-marin.The pile can be made up of a multitude of assemblable sections so that it is adaptable to the depth of the seabed.

De manière générale, l'invention comprend tous les moyens constituant des équivalents techniques des moyens décrits, ainsi que leurs combinaisons, si celles-ci sont exécutées suivant son esprit et mise en oeuvre dans le cadre de la protection comme revendiquée.In general, the invention includes all the means constituting technical equivalents of the means described, as well as their combinations, if these are executed according to the spirit and implemented in the context of protection as claimed.

Claims (9)

10- Installation de dragage, notamment pour le dragage en grande profondeur, par laquelle un bras porteur d'une tête de travail est articulé à un support de façon pivotante autour d'un axe horizontal et deux câbles de papillonnage sont prévus pour la commande de chaque mouvement de passe de dragage en forme d'un arc de cercle, qui sont respectivement ancrés au fond marin à des endroits situés de part et d'autre de la tête de travail, en dehors de la trajectoire de passe de balayage et passent par des moyens fixés à la tête de travail pour venir s'enrouler sur deux treuils montés sur le corps flottant, ce dernier comportant au moins un dispositif d'ancrage du corps flottant au fond sous-marin dans une position fixe de travail, qui est monté sur le corps flottant verticalement mobile entre une position d'ancrage enfoncée dans le fond marin et une position soulevée hors de ce fond, caractérisée en ce que ledit bras (3) porteur de la tête de travail (4) est monté sur un support (5) qui est verticalement déplaçable sur le dispositif d'ancrage (2), au moins dans la partie inférieure de celui-ci, entre une position de travail dans laquelle le bras forme un angle relativement faible avec le dispositif d'ancrage et une position dans laquelle il est sensiblement parallèle au fond.10- Dredging installation, in particular for dredging at great depth, by which an arm carrying a working head is articulated to a support so as to pivot about a horizontal axis and two butterfly cables are provided for controlling each dredging pass movement in the form of a circular arc, which are respectively anchored to the seabed at places located on either side of the work head, outside the sweep pass path and pass through means attached to the working head for winding on two winches mounted on the floating body, the latter comprising at least one device for anchoring the floating body to the seabed in a fixed working position, which is mounted on the vertically movable floating body between an anchoring position pressed into the seabed and a raised position out of this bottom, characterized in that said arm (3) carrying the working head (4) is mounted on a support ( 5) who is vertically movable on the anchoring device (2), at least in the lower part thereof, between a working position in which the arm forms a relatively small angle with the anchoring device and a position in which it is substantially parallel to the bottom. 2.- Installation selon la revendication 1, caractérisée en ce que le support (5) du bras (3) porteur de la tête de travail (4) est réalisé sous forme d'un chariot déplaçable au moyen d'un dispositif d'entraînement à pignons (8) et crémaillère (10), la crémaillère étant de préférence associée au dispositif d'ancrage pouvant être formé par un pieu vertical.2.- Installation according to claim 1, characterized in that the support (5) of the arm (3) carrying the working head (4) is made in the form of a carriage movable by means of a drive device with pinions (8) and rack (10), the rack preferably being associated with the anchoring device which can be formed by a vertical stake. 3.- Installation selon la revendication 1, caractérisée en ce qu'elle comprend un dispositif d'ancrage auxiliaire (13) tel qu'un pieu, verticalement mobile entre une position d'ancrage dans le fond sous-marin (16) et une position soulevée, le dispositif d'ancrage auxiliaire (13) étant situé décalé du dispositif d'ancrage (2) dans la direction d'avancement du corps flottant (1), à une distance variable.3.- Installation according to claim 1, characterized in that it comprises an auxiliary anchoring device (13) such as a pile, vertically movable between an anchoring position in the seabed (16) and a raised position, the auxiliary anchoring device (13) being located offset from the anchoring device (2) in the direction of advance of the floating body (1), at a variable distance. 4.- Installation selon la revendication 3, caractérisée en ce que le dispositif d'ancrage auxiliaire (13) est relié à un chariot (15) monté verticalement mobile sur le dispositif d'ancrage (2).4.- Installation according to claim 3, characterized in that the auxiliary anchoring device (13) is connected to a carriage (15) mounted vertically movable on the anchoring device (2). 5.- Installation selon la revendication 4, caractérisée en ce que le chariot (15) comprend un dispositif d'entraînement à pignons et à crémaillère (10').5.- Installation according to claim 4, characterized in that the carriage (15) comprises a drive device with pinions and rack (10 '). 60- Installation selon l'une des revendications 4 ou 5, caractérisée en ce que le dispositif d'ancrage auxiliaire (13) est relié au chariot (15) par un dispositif de parallèlogramme (14) de forme variable, de façon pivotante dans un plan vertical sous l'effet de moyens de commande tel qu'un câble (17) et un treuil (18) monté sur le corps flottant.6 0 - Installation according to one of claims 4 or 5, characterized in that the auxiliary anchoring device (13) is connected to the carriage (15) by a parallelogram device (14) of variable shape, pivotally in a vertical plane under the effect of control means such as a cable (17) and a winch (18) mounted on the floating body. 7.- Installation selon l'une des revendications 2 à 6, caractérisée en ce que les crémaillères (10, 10') pour le déplacement des chariots (5, 15) sont prévues sur le dispositif d'ancrage (2) et en ce que les chariots (5,15) portent des pignons et des moteurs pour leur entraînement..7.- Installation according to one of claims 2 to 6, characterized in that the racks (10, 10 ') for moving the carriages (5, 15) are provided on the anchoring device (2) and in that that the carriages (5,15) carry pinions and motors for their drive. 8.- Installation selon l'une des revendications 1 à 7, la tête de travail étant une tête d'aspiration, caractérisée en ce qu'une pompe d'aspiration (29) est montée dans le bras (3) porteur de la tête de travail (4) et destinée à refouler la matière aspirée dans une conduite de transfert (30) s'étendant également partiellement dans le bras (3).8.- Installation according to one of claims 1 to 7, the working head being a suction head, characterized in that a suction pump (29) is mounted in the arm (3) carrying the working head (4) and intended to discharge the material sucked into a transfer line (30) also partially extending in the arm (3). 9.- Installation selon l'une des revendications 1 à 8, caractérisée en ce que la position de la tête de travail (4), le cas échéant équipée d'un outil de coupe tel qu'une roue-pelle (27), est réglable par l'intermédiaire d'un vérin (28) pouvant être télécommandé qui est monté entre l'extrémité du bras (3) et de la tête de travail (4).9.- Installation according to one of claims 1 to 8, characterized in that the position of the working head (4), if necessary equipped with a cutting tool such as a shovel wheel (27), is adjustable by means of a jack (28) which can be remotely controlled which is mounted between the end of the arm (3) and the working head (4).
EP81402003A 1980-12-16 1981-12-15 Installation for dredging a sea bottom, particularly for great depths Expired EP0054498B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8026683A FR2500868A1 (en) 1980-12-16 1980-12-16 METHOD FOR DREDGING A SUBMARINE BASE, IN PARTICULAR IN LARGE DEPTH, AND INSTALLATION FOR IMPLEMENTING SAID METHOD
FR8026683 1980-12-16

Publications (2)

Publication Number Publication Date
EP0054498A1 true EP0054498A1 (en) 1982-06-23
EP0054498B1 EP0054498B1 (en) 1985-05-29

Family

ID=9249151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81402003A Expired EP0054498B1 (en) 1980-12-16 1981-12-15 Installation for dredging a sea bottom, particularly for great depths

Country Status (5)

Country Link
US (2) US4445290A (en)
EP (1) EP0054498B1 (en)
CA (2) CA1167074A (en)
DE (1) DE3170778D1 (en)
FR (1) FR2500868A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536439A1 (en) * 1982-11-19 1984-05-25 Valeo Dredger with improved stability
EP0826836A1 (en) * 1996-09-03 1998-03-04 Ballast Nedam Grond en Wegen B.V. Vessel provided with a vertical ladder with tools for working underwater

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4485569A (en) * 1983-05-06 1984-12-04 Mitsubishi Jukogyo Kabushiki Kaisha Spud arrangement for a dredge
US5791074A (en) * 1993-07-15 1998-08-11 Minpro Australia N.L. Dredge
AU674599B2 (en) * 1993-07-15 1997-01-02 Minpro Australia N.L. Dredge
US5421109A (en) * 1994-01-31 1995-06-06 American Oilfield Divers, Inc. Underwater site clearance sweep apparatus and method
GB2315787B (en) * 1996-03-01 1999-07-21 Seabed Impeller Levelling And Dredging apparatus
US20050194367A1 (en) * 2004-03-02 2005-09-08 Fredrick William G.Jr. System and method for remote controlled actuation of laser processing head
US20060123671A1 (en) * 2004-12-14 2006-06-15 Cornelis Heuvelman Cutter suction dredge
EP2603642B1 (en) * 2010-08-13 2019-03-13 Deep Reach Technology Inc. Subsea excavation systems and methods
NL2007694C2 (en) * 2011-11-01 2013-05-07 Ihc Holland Ie Bv Anchoring system.
US10287746B1 (en) 2015-12-14 2019-05-14 Dsc Dredge, Llc Wide-format swinging ladder dredge
US10526050B1 (en) 2018-09-18 2020-01-07 Johnson Outdoors Inc. Shallow water anchor with hydraulic actuation
GB2622764A (en) * 2022-06-15 2024-04-03 Atureliya Senake Subterranean space creation and utilisation solutions

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2271344A (en) * 1940-12-23 1942-01-27 John D Rauch Reclinable spud construction
DE963574C (en) * 1954-07-15 1957-05-09 Orenstein & Koppel Ag Facility for entanglement
FR1388228A (en) * 1963-05-13 1965-02-05 Ellicott Machine Corp Dredging device for excavation in submerged soil
DE1912311A1 (en) * 1968-03-12 1969-12-18 Ingbureauvoor Systemen En Octr Process for cutting loose and sucking up soil with the aid of a cutter suction dredger and cutter suction dredger for carrying out such a process
DE2051941A1 (en) * 1969-11-05 1971-05-13 Dan Ionescu Sisesti, Bukarest Floating suction dredger with movable suction pipe
FR2102603A5 (en) * 1970-08-11 1972-04-07 Dragages Tp Fse Entr
US4073078A (en) * 1975-11-03 1978-02-14 Leitz Julius H Adjustable dredging and trenching apparatus
FR2383273A1 (en) * 1977-03-08 1978-10-06 Ballast Nedam Groep Nv DEVICE FOR EXCAVATION OF HARD SOILS
US4212121A (en) * 1978-07-31 1980-07-15 Mitsubishi Jukogyo Kabushiki Kaisha Method and apparatus for dredging having bow-stern movement of the suction means

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1019610A (en) * 1912-01-25 1912-03-05 William Thomas Donnelly Dredging apparatus.
US1792065A (en) * 1927-05-13 1931-02-10 George F Hogan Dredge
US1962363A (en) * 1933-10-02 1934-06-12 Paul D Reimel Bucket dredge
US2308743A (en) * 1939-09-16 1943-01-19 William P Bulkley Barge
US3206875A (en) * 1962-07-12 1965-09-21 American Marine & Machinery Co Hydraulic drive means for dredge comprising means for the selective injection or withdrawal of pressure fluid from a motor driving circuit
GB974458A (en) * 1962-10-17
NL125626C (en) * 1963-12-03 1900-01-01
US3495409A (en) * 1967-01-10 1970-02-17 Wilhelm Riedemann Apparatus for building a retaining wall along a bank of a body of water
US3591936A (en) * 1969-01-15 1971-07-13 Koninkl Mij Tot Het Uitvoeren Submarine cutter dredger
US3656449A (en) * 1970-06-01 1972-04-18 Herbert W Mead Propelling means for a dredge
US3755932A (en) * 1971-06-23 1973-09-04 N Cargile Jack-up dredge
BE789136A (en) * 1971-09-23 1973-03-22 Duval Leonard A APPARATUS FOR DREDGING DIVIDED SOLIDS SUBMERGED IN A LIQUID
GB1460807A (en) * 1974-04-08 1977-01-06 Hattum & Blankevoort Bv Dredge
US3983707A (en) * 1975-03-05 1976-10-05 Georgy Mikhailovich Lezgintsev Method and apparatus for moving an object on the bottom of a body of water
NL182741C (en) * 1975-09-05 1988-05-02 Ihc Holland Nv SUCTION DREDGER WITH VESSEL, LADDER, SUCTION TUBE, CUTTING MACHINE OR EXCAVATOR.
FR2395361A1 (en) * 1977-06-23 1979-01-19 Ferodo Sa DRAGUE
FR2453945A1 (en) * 1979-04-10 1980-11-07 Bibaut Gilbert MACHINE FOR CURING PONDS, MARSHES OR CANALS

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2271344A (en) * 1940-12-23 1942-01-27 John D Rauch Reclinable spud construction
DE963574C (en) * 1954-07-15 1957-05-09 Orenstein & Koppel Ag Facility for entanglement
FR1388228A (en) * 1963-05-13 1965-02-05 Ellicott Machine Corp Dredging device for excavation in submerged soil
DE1912311A1 (en) * 1968-03-12 1969-12-18 Ingbureauvoor Systemen En Octr Process for cutting loose and sucking up soil with the aid of a cutter suction dredger and cutter suction dredger for carrying out such a process
DE2051941A1 (en) * 1969-11-05 1971-05-13 Dan Ionescu Sisesti, Bukarest Floating suction dredger with movable suction pipe
FR2102603A5 (en) * 1970-08-11 1972-04-07 Dragages Tp Fse Entr
US4073078A (en) * 1975-11-03 1978-02-14 Leitz Julius H Adjustable dredging and trenching apparatus
FR2383273A1 (en) * 1977-03-08 1978-10-06 Ballast Nedam Groep Nv DEVICE FOR EXCAVATION OF HARD SOILS
US4212121A (en) * 1978-07-31 1980-07-15 Mitsubishi Jukogyo Kabushiki Kaisha Method and apparatus for dredging having bow-stern movement of the suction means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536439A1 (en) * 1982-11-19 1984-05-25 Valeo Dredger with improved stability
EP0826836A1 (en) * 1996-09-03 1998-03-04 Ballast Nedam Grond en Wegen B.V. Vessel provided with a vertical ladder with tools for working underwater

Also Published As

Publication number Publication date
DE3170778D1 (en) 1985-07-04
USRE32297E (en) 1986-12-02
CA1167074A (en) 1984-05-08
US4445290A (en) 1984-05-01
EP0054498B1 (en) 1985-05-29
FR2500868A1 (en) 1982-09-03
CA1224815B (en) 1987-07-28
FR2500868B1 (en) 1984-12-28

Similar Documents

Publication Publication Date Title
EP0054498B1 (en) Installation for dredging a sea bottom, particularly for great depths
EP2307269B1 (en) Structure for the offshore installation of at least one wind turbine or underwater generator, and methods for transport and offshore installation of at least one wind turbine or underwater generator
EP2043913B1 (en) Apparatus for recovering an underwater or marine vehicle
EP1748108A1 (en) Auger for piling
EP2321470A2 (en) Seat portion structure for a hydraulic turbine engine
FR3091256A1 (en) RECEPTION DEVICE FOR AN UNDERWATER VEHICLE
EP3906188B1 (en) Docking device for an underwater vehicle
FR2580267A1 (en) DEVICE FOR MANEUVERING FLEXIBLE TUBULAR CABLES OR CONDUITS THROUGH A DEVIATOR BODY
EP0002991A1 (en) Method of depositing materials on the bottom of the sea along a given path, apparatus for carrying out this method, vehicles adapted for use in this apparatus and the use of this apparatus
FR2740427A1 (en) VESSEL TRACTED BY KITE VIA AN ARTICULATED ARM
FR2590292A1 (en) SLIDING ARRAY MACHINE FOR MAKING TRENCHES OR DRAINING SOIL
FR2475681A1 (en) DEVICE FOR STORING FLEXIBLE TUBULAR CABLES OR CONDUITS IN THE SUB-MARINE BOTTOM
FR2926805A1 (en) DEVICE FOR LIFTING AND MOVING AN OBJECT COMPRISING THE IMPLEMENTATION OF AT LEAST ONE TENSION CABLE
EP0826835B1 (en) Trenching apparatus for digging deep trenches
EP0592326B1 (en) Trenching apparatus for digging deep trenches with cutting drums
BE887882A (en) STRUCTURE FOR SUPPORTING APPARATUS ABOVE THE BOTTOM OF A MASS OF WATER
EP0093637A1 (en) Apparatus for piling and unpiling bulk materials
EP3652429B1 (en) Hydroelectric power plant
CA1092551A (en) Sea excavation system with clamsbell bricket being horizonatally guided by cables
FR2505803A1 (en) UNLOADING DEVICE FOR VESSELS CONTAINING BULK GOODS
FR3115524A1 (en) NAUTICAL CRASSATS CLEANING PLATFORM
FR2539157A1 (en) ARROW SLICER
EP1546471B1 (en) Excavating tool for hydraulic shovel
CH629556A5 (en) Device for removing snow
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

Designated state(s): BE DE GB NL

17P Request for examination filed

Effective date: 19821216

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE GB NL

REF Corresponds to:

Ref document number: 3170778

Country of ref document: DE

Date of ref document: 19850704

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

Ref country code: NL

Payment date: 19871231

Year of fee payment: 7

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

Ref country code: GB

Effective date: 19881215

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

Ref country code: BE

Effective date: 19881231

BERE Be: lapsed

Owner name: HYDROCONSULT S.A.

Effective date: 19881231

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

Ref country code: NL

Effective date: 19890701

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19890901