EP0749384A1 - Wreck cargo recovery method - Google Patents

Wreck cargo recovery method

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Publication number
EP0749384A1
EP0749384A1 EP95911382A EP95911382A EP0749384A1 EP 0749384 A1 EP0749384 A1 EP 0749384A1 EP 95911382 A EP95911382 A EP 95911382A EP 95911382 A EP95911382 A EP 95911382A EP 0749384 A1 EP0749384 A1 EP 0749384A1
Authority
EP
European Patent Office
Prior art keywords
wreck
pincers
rod train
cargo
recovering
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
EP95911382A
Other languages
German (de)
French (fr)
Other versions
EP0749384B1 (en
Inventor
Jean Roux
Pierre Valdy
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.)
Institut Francais de Recherche pour lExploitation de la Mer (IFREMER)
Original Assignee
Institut Francais de Recherche pour lExploitation de la Mer (IFREMER)
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Publication date
Application filed by Institut Francais de Recherche pour lExploitation de la Mer (IFREMER) filed Critical Institut Francais de Recherche pour lExploitation de la Mer (IFREMER)
Publication of EP0749384A1 publication Critical patent/EP0749384A1/en
Application granted granted Critical
Publication of EP0749384B1 publication Critical patent/EP0749384B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C7/00—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects
    • B63C7/16—Apparatus engaging vessels or objects
    • B63C7/20—Apparatus engaging vessels or objects using grabs

Definitions

  • the present invention relates to a method of recovering a cargo on board a wreck sunk at great depth.
  • Recovering a cargo trapped inside a wreck is a very difficult task. It requires that an access through the wreck be arranged. This access can be done through hatch panels, if the configuration allows (wreck resting horizontally on the bottom). It can be done through the hull, if the wreck is lying or overturned on the bottom.
  • the wreck is cut using explosives or flame-cutting torches used by divers.
  • the cargo is recovered using conventional lifting means (skips implemented from anchored barges for example).
  • the object of the invention consists in implementing a pincer of high capacity from such ships by means of an underwater module responsible for moving it and actuating it under the control of cameras.
  • the invention relates to a method for recovering a cargo trapped on board a wreck sunk at great depth, from a dynamically positioned drilling vessel. This process is characterized by the fact that the dismantling of the wreckage is carried out by means of pincers and a damping device arranged at the bottom of the rod train.
  • the invention also relates to a device for dismantling a wreck sunk at great depth, from a dynamically positioned drilling vessel. This device is characterized in that it consists of a pincer and a damping device arranged at the lower part of the rod train.
  • the closing force of the jaws of the pincers actuated by means of jacks is such (several hundreds of tons) that they can manage to tear the walls of the wreck in order to access the cargo.
  • the pincers are equipped with side walls and are used in the same way as a bucket of several cubic meters of capacity.
  • the pincers are tightened powerfully on the structure to be dismantled. It is then hoisted vertically so as to tear off the piece caught between its jaws. The pieces removed are more or less large depending on the tear lines obtained. Some pieces resist better than others and it is sometimes impossible to tear them off without risking the breaking of the drill string.
  • the pincers are then moved slightly and, in general, after several attempts, tearing occurs. This work of destruction by tearing off after tightening is very different from the work of collecting grapples conventional.
  • the damping device is essential for implementing the method. Indeed, at great depths, under the maximum traction force, the total elongation of the rod train is about 10m.
  • the accumulated energy of the "mass-spring" system is such that without the damping device, the entire module and the pincers would go up, during pulling out, with strong acceleration, much higher than the equilibrium position . This would cause an uncontrolled buckling of the drill string with the risk of rupture.
  • the processing times are relatively long (1 ascent-descent cycle per day at the depth of 3000 m), but such operations can prove to be economically profitable given the value of certain ore shipments for example.
  • FIG. 1 represents in section the device according to the invention
  • Figure 2 shows in section the submarine module
  • Figure 3 shows in section the pincers.
  • Figure 1 shows the sectional device installed on board a drilling vessel (1).
  • the device comprises the pincers (2) installed at the end of the rod train (3) and handled vertically by means of the derrick (4) and the rotation table (5).
  • a control module (6) ensures the horizontal movement of the pincers by means of propellants and ensures its operation hydraulically.
  • An umbilical (7) deployed by means of a winch (8) transmits energy and control to the desk pad module. It is attached along the rod train by means of quick-fixing collars (9).
  • the ship (1) On the surface, the ship (1) is maintained by dynamic positioning in a circle with a radius of 5m.
  • the pincers (2) are moved vertically by means of the rod train (3) and horizontally by means of the thrusters.
  • the thrusters are oriented by direct rotation of the rod train (3) at the level of the rotation table (5).
  • a damping device (10) composed of a series of circular plates is arranged at the lower part of the drill string so that the drill string cannot enter into compression during an abrupt release of the wreck (11 ) during a tear-off action. Indeed, an uncontrolled compression force risks damaging the rod train as a result of buckling of its section. The energy accumulated during the tensioning of the rod train is very important, because the extension of several meters under an effort of several hundred tonnes.
  • FIG. 2 shows a section of the submarine module (6).
  • a hydraulic pump (12) driven by an electric motor (13) supplies the motors of the propellants (14) and the jacks of the pincers via a set of solenoid valves (15) and a compensation tank (16).
  • a "wide angle" camera (17) and a projector (18) allow the situation of the pincers (2) relative to the wreck (11) to be observed.
  • the thrusters (14) are arranged diametrically opposite with respect to the rod train (3).
  • the assembly is housed in a cylinder (19) made of very thick sheet metal, so as to protect the equipment during work inside the wreck (11).
  • the rod train (3) passes through the module (6), as well as through the damping device (10).
  • the diameter of the cylinder as well as that of the plates constituting the damping device (10) is such that it passes through the rotation table (5) during the handling phases on board.
  • Figure (3) shows a section of the pincers (2).
  • the jaws (20) are fitted with lips (21) and teeth (22) which are highly dimensioned. They are, in known manner, actuated by means of jacks (23) and synchronized by means of gears (24).
  • Removable walls (25) are bolted to the sides of the jaws (20), in order to transform them into pockets during the cargo recovery phase.
  • the chassis has an interior volume of trapezoidal section (26) open at its lower part. This volume is arranged so as to protect a camera (27), two projectors (28) and a sounder (29).
  • a device for injecting clear water makes it possible to form a cone of clear water in the fields of the camera (27) and is intended to increase the visibility when the pincers are at the bottom of the hold in a completely turbid volume of water due to the suspended sediment and the absence of current inside the wreck. This device must allow the identification of the objective when the pincers rest wide open on its teeth.
  • Clear water is pumped to the surface by means of drilling pumps and is conveyed to the pincers through the rod train (3). It could just as easily be pumped at the level of the submarine module by means of a pump located inside the module for example.
  • the method and the device of the invention are described in a preferred form, but not limiting. This is how the drilling vessel can be replaced by a naval support equipped with a derrick and a specific rod train.
  • the thrusters fitted to the submarine module can be arranged in a different known manner, so as to move the pincers without the need to orient the rod train.
  • the method and the device which are the subject of the invention apply to the recovery of all kinds of cargo, including radioactive products and nuclear reactors enclosed inside deep wrecks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)
  • Disintegrating Or Milling (AREA)
  • Physical Water Treatments (AREA)
  • Confectionery (AREA)
  • Ship Loading And Unloading (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Deep-water wreck cargo recovery method using a heavy-duty pincer assembly (2) deployed from the drill string (3) of a dynamically positioned drill ship (1) and controlled via an underwater module (6) fitted with propulsion means, as well as a shock absorbing device (10) in the lower portion of the drill string. During the demolition stage, the pincer assembly rips open the wreck to provide access to the cargo. During the recovery stage, the pincer assembly is fitted with side walls and is used as a bucket. The method is particularly useful for recovering ores from modern ships and for recovering hazardous materials (e.g. radioactive materials).

Description

Procédé de récupération d'une cargaison à bord d'une épave. Method of recovering a cargo on board a wreck.
La présente invention concerne un procédé de récupération d'une cargaison à bord d'une épave coulée par grande profondeur. II existe au fond des mers de nombreuses épaves contenant des cargaisons de valeur qu'il est actuellement impossible d'exploiter par des procédés conventionnels du fait de la profondeur. En effet, les procédés actuels font appel le plus souvent à des plongeurs et sont par là même limités aux faibles profondeurs. La récupération d'une cargaison enfermée à l'intérieur d'une épave est une tâche très difficile. Elle nécessite que soit aménagé un accès au travers de l'épave. Cet accès peut se faire au travers des panneaux de cale, si la configuration le permet (épave reposant horizontalement sur le fond). Il peut se faire au travers de la coque, si l'épave est couchée ou renversée sur le fond.The present invention relates to a method of recovering a cargo on board a wreck sunk at great depth. There are many wrecks at the bottom of the sea containing valuable cargoes which it is currently impossible to exploit by conventional methods due to the depth. In fact, current methods most often use divers and are therefore limited to shallow depths. Recovering a cargo trapped inside a wreck is a very difficult task. It requires that an access through the wreck be arranged. This access can be done through hatch panels, if the configuration allows (wreck resting horizontally on the bottom). It can be done through the hull, if the wreck is lying or overturned on the bottom.
De façon courante, l'épave est découpée au moyen d'explosifs ou de chalumeaux oxycoupeurs mis en oeuvre par des plongeurs. Une fois que l'accès est aménagé, la cargaison est récupérée grâce à des moyens de levage conventionnels (bennes mises en oeuvre à partir de barges ancrées par exemple).Commonly, the wreck is cut using explosives or flame-cutting torches used by divers. Once the access is arranged, the cargo is recovered using conventional lifting means (skips implemented from anchored barges for example).
C'est ainsi que des cargaisons de valeur ont pu être exploitées par des profondeurs inférieures à 500 m. Depuis quelques années, on utilise dans le domaine du sauvetage de très fortes bennes de dragage pour démolir les épaves qui présentent des dangers pour la navigation. Ces bennes sont actionnées par des câbles sous le contrôle de plongeurs. Leur force de fermeture et leur force de traction peut atteindre 500 Tonnes et permet alors d'extraire de gros morceaux d'épave par déchirement des tôles.This is how valuable cargoes could be exploited at depths of less than 500 m. In recent years, very large dredging skips have been used in the salvage sector to demolish wrecks which pose a danger to navigation. These buckets are operated by cables under the control of divers. Their closing force and their tensile force can reach 500 Tons and can then extract large pieces of wreckage by tearing the sheets.
En ce qui concerne les cargaisons profondes, seules les épaves présentant peu de difficultés d'accès ont pu être exploitées, soit que la cargaison gisait au fond par suite de rupture du navire lors du naufrage, soit que le navire était en bois et fortement détérioré. Des sous-marins habités ou télé-opérés ont été utilisés à cette fin avec succès.With regard to deep cargoes, only wrecks with few difficulties of access could be exploited, either that the cargo lay at the bottom due to rupture of the ship during the sinking, or that the ship was wooden and badly deteriorated . Manned or remotely operated submarines have been successfully used for this purpose.
En ce qui concerne les cargaisons profondes enfermées à bord d'épaves contemporaines en acier, quelques tentatives ont été faites et aucun procédé ne s'est avéré techniquement et économiquement satisfaisant. Le démantèlement par explosifs a été associé à l'utilisation de bennes légères manutentionnées au moyen de câbles. L'efficacité des explosifs s'est avérée décevante par grande profondeur. Le procédé objet de l'invention permet de résoudre à la fois les problèmes de démantèlement de la coque et ceux de la récupération de la cargaison, et ce, par grande profondeur.With regard to deep cargoes trapped on contemporary steel wrecks, some attempts have been made and no process has been found to be technically and economically satisfactory. Explosive dismantling has been associated with the use of light skips handled by cables. The effectiveness of the explosives was disappointing at great depth. The process which is the subject of the invention makes it possible to solve both the problems of dismantling the hull and those of recovering the cargo, and this, by great depth.
Dans les années 70 a été développé le premier navire de forage à positionnement dynamique pour la recherche de pétrole par grande profondeur (300 m à 3000 m). Il existe actuellement dans le monde une quinzaine de navires capable de forer à grande profondeur. Ils sont équipés de derricks lourds capables de développer des efforts verticaux de 500 Tonnes. Des compensateurs de pilonnement permettent de compenser les mouvements du navire, lorsque l'outil est en contact avec le sol. La taille du puits situé en-dessous du derrick est telle (5mx5m) qu'il est possible de manutentionner des colis importants.In the 1970s, the first dynamically positioned drilling vessel for oil exploration at great depth (300 m to 3000 m) was developed. There are currently around fifteen ships in the world capable of drilling at great depths. They are equipped with heavy derricks capable of developing vertical forces of 500 Tons. Heave compensators compensate for the movements of the ship when the tool is in contact with the ground. The size of the well located below the derrick is such (5mx5m) that it is possible to handle large packages.
L'objet de l'invention consiste à mettre en oeuvre une tenaille de forte capacité à partir de tels navires au moyen d'un module sous-marin chargé de la déplacer et de l'actionner sous le contrôle de caméras. L'invention concerne un procédé de récupération d'une cargaison enfermée à bord d'une épave coulée à grande profondeur, à partir d'un navire de forage à positionnement dynamique. Ce procédé est caractérisé par le fait que le démantèlement de l'épave est réalisé au moyen d'une tenaille et d'un dispositif amortisseur disposés à la partie inférieure du train de tige. L'invention concerne également un dispositif de démantèlement d'une épave coulée à grande profondeur, à partir d'un navire de forage à positionnement dynamique. Ce dispositif est caractérisé par le fait qu'il est constitué d'une tenaille et d'un dispositif amortisseur disposés à la partie inférieure du train de tige.The object of the invention consists in implementing a pincer of high capacity from such ships by means of an underwater module responsible for moving it and actuating it under the control of cameras. The invention relates to a method for recovering a cargo trapped on board a wreck sunk at great depth, from a dynamically positioned drilling vessel. This process is characterized by the fact that the dismantling of the wreckage is carried out by means of pincers and a damping device arranged at the bottom of the rod train. The invention also relates to a device for dismantling a wreck sunk at great depth, from a dynamically positioned drilling vessel. This device is characterized in that it consists of a pincer and a damping device arranged at the lower part of the rod train.
La force de fermeture des mâchoires de la tenaille actionnées au moyen de vérins est telle (plusieurs centaines de Tonnes) qu'elles peuvent parvenir à déchirer les parois de l'épave afin d'accéder à la cargaison. Dans la phase de récupération, la tenaille est équipée de parois latérales et est utilisée à la manière d'une benne de plusieurs mètres cubes de capacité.The closing force of the jaws of the pincers actuated by means of jacks is such (several hundreds of tons) that they can manage to tear the walls of the wreck in order to access the cargo. In the recovery phase, the pincers are equipped with side walls and are used in the same way as a bucket of several cubic meters of capacity.
Dans la phase de démolition, la tenaille est serrée puissamment sur la structure à démanteler. Elle est ensuite hissée verticalement de façon à arracher le morceau pris entre ses mâchoires. Les morceaux enlevés sont plus ou moins gros en fonction des lignes de déchirure obtenues. Certains morceaux résistent mieux que d'autres et il est parfois impossible de les arracher sans risquer la rupture du train de tige. La tenaille est alors déplacée légèrement et, en général, après plusieurs tentatives, l'arrachement se produit. Ce travail de destruction par arrachement après serrage est bien différent du travail de prélèvement des grappins conventionnels. Le dispositif amortisseur est indispensable pour mettre en oeuvre le procédé. En effet, aux grandes profondeurs, sous l'effort maximum de traction, l'allongement total du train de tige est d'environ 10m. L'énergie accumulée du système "masse-ressort" est telle que sans le dispositif amortisseur, l'ensemble du module et de la tenaille remonterait, lors de l'arrachage, avec une forte accélération, bien plus haut que la position d'équilibre. Cela entraînerait un flambement incontrôlé du train de tige avec un risque de rupture.In the demolition phase, the pincers are tightened powerfully on the structure to be dismantled. It is then hoisted vertically so as to tear off the piece caught between its jaws. The pieces removed are more or less large depending on the tear lines obtained. Some pieces resist better than others and it is sometimes impossible to tear them off without risking the breaking of the drill string. The pincers are then moved slightly and, in general, after several attempts, tearing occurs. This work of destruction by tearing off after tightening is very different from the work of collecting grapples conventional. The damping device is essential for implementing the method. Indeed, at great depths, under the maximum traction force, the total elongation of the rod train is about 10m. The accumulated energy of the "mass-spring" system is such that without the damping device, the entire module and the pincers would go up, during pulling out, with strong acceleration, much higher than the equilibrium position . This would cause an uncontrolled buckling of the drill string with the risk of rupture.
Les temps de mise en oeuvre sont relativement longs (1 cycle montée- descente par jour à la profondeur de 3000 m), mais de telles opérations peuvent s'avérer économiquement rentables étant donnée la valeur de certaines cargaisons de minerai par exemple.The processing times are relatively long (1 ascent-descent cycle per day at the depth of 3000 m), but such operations can prove to be economically profitable given the value of certain ore shipments for example.
Le dispositif permettant la mise en oeuvre du procédé est décrit ci-après en référence aux dessins annexés, dans lesquels : la figure 1 représente en coupe le dispositif selon l'invention ; la figure 2 représente en coupe le module sous-marin ; la figure 3 représente en coupe la tenaille.The device allowing the implementation of the method is described below with reference to the accompanying drawings, in which: FIG. 1 represents in section the device according to the invention; Figure 2 shows in section the submarine module; Figure 3 shows in section the pincers.
La figure 1 représente le dispositif en coupe installé à bord d'un navire de forage (1). Le dispositif comporte la tenaille (2) installée à l'extrémité du train de tige (3) et manutentionnée verticalement au moyen du derrick (4) et de la table de rotation (5). Un module de contrôle (6) assure le déplacement horizontal de la tenaille au moyen de propulseurs et assure son fonctionnement par voie hydraulique. Un ombilical (7) déployé au moyen d'un treuil (8) transmet énergie et contrôle au module sous-main. Il est attaché le long du train de tige au moyen de colliers de fixation rapide (9). A la surface, le navire (1) est maintenu par positionnement dynamique dans un cercle de rayon de 5m. Au fond, la tenaille (2) est déplacée verticalement au moyen du train de tige (3) et horizontalement au moyen des propulseurs. Dans une forme préférentielle de l'invention, les propulseurs sont orientés par rotation directe du train de tige (3) au niveau de la table de rotation (5). Un dispositif amortisseur (10) composé d'une série de plaques circulaires est disposé à la partie inférieure du train de tige de façon à ce que le train de tige ne puisse rentrer en compression lors d'un relâchement brusque de l'épave (11) pendant une action d'arrachement. En effet, un effort de compression non contrôlé risque de détériorer le train de tige par suite de flambement de sa section. L'énergie accumulée lors de la mise sous tension du train de tige est très importante, du fait de l'allongement de plusieurs mètres sous un effort de plusieurs centaines de tonnes.Figure 1 shows the sectional device installed on board a drilling vessel (1). The device comprises the pincers (2) installed at the end of the rod train (3) and handled vertically by means of the derrick (4) and the rotation table (5). A control module (6) ensures the horizontal movement of the pincers by means of propellants and ensures its operation hydraulically. An umbilical (7) deployed by means of a winch (8) transmits energy and control to the desk pad module. It is attached along the rod train by means of quick-fixing collars (9). On the surface, the ship (1) is maintained by dynamic positioning in a circle with a radius of 5m. At the bottom, the pincers (2) are moved vertically by means of the rod train (3) and horizontally by means of the thrusters. In a preferred form of the invention, the thrusters are oriented by direct rotation of the rod train (3) at the level of the rotation table (5). A damping device (10) composed of a series of circular plates is arranged at the lower part of the drill string so that the drill string cannot enter into compression during an abrupt release of the wreck (11 ) during a tear-off action. Indeed, an uncontrolled compression force risks damaging the rod train as a result of buckling of its section. The energy accumulated during the tensioning of the rod train is very important, because the extension of several meters under an effort of several hundred tonnes.
La figure 2 représente une coupe du module sous-marin (6). Une pompe hydraulique (12) entraînée par un moteur électrique (13) alimente les moteurs des propulseurs (14) et les vérins de la tenaille via un ensemble d'électrovannes (15) et un réservoir de compensation (16).Figure 2 shows a section of the submarine module (6). A hydraulic pump (12) driven by an electric motor (13) supplies the motors of the propellants (14) and the jacks of the pincers via a set of solenoid valves (15) and a compensation tank (16).
A la base du module une caméra "grand angle" (17) et un projecteur (18) permettent d'observer la situation de la tenaille (2) par rapport à l'épave (11).At the base of the module a "wide angle" camera (17) and a projector (18) allow the situation of the pincers (2) relative to the wreck (11) to be observed.
A la partie supérieure, les propulseurs (14) sont disposés diamétralement opposés par rapport au train de tige (3).At the top, the thrusters (14) are arranged diametrically opposite with respect to the rod train (3).
L'ensemble est logé dans un cylindre (19) réalisé en tôle de forte épaisseur, de façon à protéger les équipements lors du travail à l'intérieur de l'épave (11). Le train de tige (3) passe au travers du module (6), ainsi qu'au travers du dispositif amortisseur (10). Le diamètre du cylindre ainsi que celui des plaques constituant le dispositif amortisseur (10) est tel qu'il passe au travers de la table de rotation (5) lors des phases de manutention bord.The assembly is housed in a cylinder (19) made of very thick sheet metal, so as to protect the equipment during work inside the wreck (11). The rod train (3) passes through the module (6), as well as through the damping device (10). The diameter of the cylinder as well as that of the plates constituting the damping device (10) is such that it passes through the rotation table (5) during the handling phases on board.
La figure (3) représente une coupe de la tenaille (2). Les mâchoires (20) sont équipées de lèvres (21) et de dents (22) fortement dimensionnées. Elles sont, de façon connue, actionnées au moyen de vérins (23) et synchronisées au moyen d'engrenages (24). Des parois démontables (25) sont boulonnées sur les côtés des mâchoires (20), afin de les transformer en poches lors de la phase de récupération de la cargaison.Figure (3) shows a section of the pincers (2). The jaws (20) are fitted with lips (21) and teeth (22) which are highly dimensioned. They are, in known manner, actuated by means of jacks (23) and synchronized by means of gears (24). Removable walls (25) are bolted to the sides of the jaws (20), in order to transform them into pockets during the cargo recovery phase.
Le châssis présente un volume intérieur de section trapézoïdale (26) ouvert à sa partie inférieure. Ce volume est agencé de façon à protéger une caméra (27), deux projecteurs (28) et un sondeur (29). Un dispositif d'injection d'eau claire permet de former un cône d'eau claire dans le champs de la caméra (27) et est destiné à accroître la visibilité lorsque la tenaille est à fond de cale dans un volume d'eau complètement turbide du fait du sédiment en suspension et de l'absence de courant à l'intérieur de l'épave. Ce dispositif doit permettre l'identification de l'objectif lorsque la tenaille repose grand ouverte sur ses dents.The chassis has an interior volume of trapezoidal section (26) open at its lower part. This volume is arranged so as to protect a camera (27), two projectors (28) and a sounder (29). A device for injecting clear water makes it possible to form a cone of clear water in the fields of the camera (27) and is intended to increase the visibility when the pincers are at the bottom of the hold in a completely turbid volume of water due to the suspended sediment and the absence of current inside the wreck. This device must allow the identification of the objective when the pincers rest wide open on its teeth.
L'eau claire est pompée à la surface au moyen des pompes de forage et est conduite vers la tenaille au travers du train de tige (3). Elle pourrait tout aussi bien être pompée au niveau du module sous-marin au moyen d'une pompe située à l'intérieur du module par exemple. Le procédé et le dispositif de l'invention sont décrit dans une forme préférentielle, mais non limitative. C'est ainsi que le navire de forage peut être remplacé par un support naval équipé d'un derrick et d'un train de tige spécifique. Les propulseurs équipant le module sous-marin peuvent être disposés d'une manière différente connue, de façon à déplacer la tenaille sans qu'il soit nécessaire d'orienter le train de tige.Clear water is pumped to the surface by means of drilling pumps and is conveyed to the pincers through the rod train (3). It could just as easily be pumped at the level of the submarine module by means of a pump located inside the module for example. The method and the device of the invention are described in a preferred form, but not limiting. This is how the drilling vessel can be replaced by a naval support equipped with a derrick and a specific rod train. The thrusters fitted to the submarine module can be arranged in a different known manner, so as to move the pincers without the need to orient the rod train.
Le procédé et le dispositif objet de l'invention s'appliquent à la récupération de toute sorte de cargaison y compris les produit radioactifs et réacteurs nucléaires enfermés à l'intérieur d'épaves profondes. The method and the device which are the subject of the invention apply to the recovery of all kinds of cargo, including radioactive products and nuclear reactors enclosed inside deep wrecks.

Claims

REVENDICATIONS
1. Procédé de récupération d'une cargaison enfermée à bord d'une épave coulée à grande profondeur, à partir d'un navire de forage à positionnement dynamique, caractérisé en ce que le démantèlement de l'épave est réalisé au moyen d'une tenaille (2) et d'un dispositif amortisseur (10) disposés à la partie inférieure du train de tige (3).1. A method of recovering a cargo locked on board a wreck sunk at great depth, from a dynamically positioned drilling vessel, characterized in that the dismantling of the wreck is carried out by means of a pincers (2) and a damping device (10) arranged at the bottom of the rod train (3).
2. Dispositif de démantèlement d'une épave à grande profondeur, à partir d'un navire de forage à positionnement dynamique, caractérisé en ce qu'il est constitué d'une tenaille (2) et d'un dispositif amortisseur (10) disposés à la partie inférieure du train de tige (3).2. Device for dismantling a wreck at great depth, from a dynamically positioned drilling vessel, characterized in that it consists of a pincer (2) and a damping device (10) arranged at the bottom of the rod train (3).
3. Dispositif selon la revendication 2, caractérisé en ce que le dispositif amortisseur (10) est constitué d'une série de plaques circulaires perpendiculaires au train de tige (3).3. Device according to claim 2, characterized in that the damping device (10) consists of a series of circular plates perpendicular to the rod train (3).
4. Dispositif selon la revendication 2, caractérisé en ce que, lors de la phase de récupération, la tenaille (2) est équipée de parois latérales (25).4. Device according to claim 2, characterized in that, during the recovery phase, the pincers (2) is equipped with side walls (25).
5. Dispositif selon les revendications 2 et 4, caractérisé en ce que le châssis de la tenaille comporte un volume de section trapézoïdale (26) ouvert à sa partie inférieure destiné à protéger un ensemble de caméra (27) et de projecteur (28). 5. Device according to claims 2 and 4, characterized in that the frame of the pincers comprises a volume of trapezoidal section (26) open at its lower part intended to protect a set of camera (27) and projector (28).
6. Dispositif selon la revendication 5, caractérisé en ce que de l'eau claire est injectée au travers de ce volume.6. Device according to claim 5, characterized in that clear water is injected through this volume.
7. Dispositif selon la revendication 2, caractérisé en ce que la tenaille est contrôlée par des propulseurs (14) disposés diamétralement opposés par rapport au train de tige à la partie supérieure d'un module sous-marin (6). 7. Device according to claim 2, characterized in that the pincers are controlled by thrusters (14) arranged diametrically opposite with respect to the rod train at the upper part of an underwater module (6).
8. Dispositif selon les revendications 2 et 7, caractérisé en ce les propulseurs (14) sont orientés directement au moyen du train de tige (3).8. Device according to claims 2 and 7, characterized in that the propellants (14) are oriented directly by means of the rod train (3).
9. Dispositif selon les revendications 2 et 7, caractérisé en ce le train de tige (3) passe au travers du système amortisseur (10) et du module sous-marin (6). 9. Device according to claims 2 and 7, characterized in that the rod train (3) passes through the damping system (10) and the submarine module (6).
EP95911382A 1994-03-10 1995-03-09 Wreck cargo recovery method Expired - Lifetime EP0749384B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9402753A FR2717148B1 (en) 1994-03-10 1994-03-10 Method of recovering a cargo on board a wreck.
FR9402753 1994-03-10
PCT/FR1995/000268 WO1995024337A1 (en) 1994-03-10 1995-03-09 Wreck cargo recovery method

Publications (2)

Publication Number Publication Date
EP0749384A1 true EP0749384A1 (en) 1996-12-27
EP0749384B1 EP0749384B1 (en) 1997-08-13

Family

ID=9460871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95911382A Expired - Lifetime EP0749384B1 (en) 1994-03-10 1995-03-09 Wreck cargo recovery method

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EP (1) EP0749384B1 (en)
JP (1) JPH09509911A (en)
AT (1) ATE156764T1 (en)
AU (1) AU680741B2 (en)
CA (1) CA2184066A1 (en)
DE (1) DE69500562D1 (en)
FR (1) FR2717148B1 (en)
NO (1) NO963455L (en)
WO (1) WO1995024337A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741037B1 (en) * 1995-11-10 1998-01-30 Ifremer METHOD FOR RECOVERING A CARGO ON BOARD A WRECK AND RECYCLING BASKET
BE1013045A3 (en) * 1999-05-19 2001-08-07 Rompay Boudewijn Gabriel Van Method and system for underwater performance of work with a crane on firm put pontoon.
EP1331191A1 (en) * 2002-01-25 2003-07-30 IHC Gusto Engineering B.V. Floating lifting device
FR2850631B1 (en) * 2003-01-31 2006-03-03 Ifremer METHOD FOR RECOVERING A CARGO OF POLLUTANT LIQUIDS ABOVE A EPAVE
KR20120045858A (en) 2010-11-01 2012-05-09 대우조선해양 주식회사 Drill ship for polar region
KR20120048097A (en) * 2010-11-05 2012-05-15 대우조선해양 주식회사 Drill ship for polar region
CN102616349A (en) * 2011-01-27 2012-08-01 裘尧云 Shipwreck underwater fragmentation salvage method
RU2521070C2 (en) * 2012-04-12 2014-06-27 Евгений Игоревич Есаулов Overwater platform for lifting and handling cargoes from water area bed, including hazardous cargoes
WO2013176562A1 (en) * 2012-05-21 2013-11-28 Esaulov Evgeny Igorevich Abovewater platform to lift objects from water area bed and process loads, including dangerous objects
CN107738733A (en) * 2017-09-19 2018-02-27 昆明理工大学 A kind of underwater salvage manipulator and its application method

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GB367567A (en) * 1931-02-23 1932-02-25 Ladislas Schill An improved grapple for raising submarines and the like
US2355086A (en) * 1943-10-27 1944-08-08 Walter B Lang Marine salvage device
US3843184A (en) * 1972-07-12 1974-10-22 E Horton Underwater search and salvage system

Non-Patent Citations (1)

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Title
See references of WO9524337A1 *

Also Published As

Publication number Publication date
FR2717148A1 (en) 1995-09-15
WO1995024337A1 (en) 1995-09-14
AU1896795A (en) 1995-09-25
ATE156764T1 (en) 1997-08-15
AU680741B2 (en) 1997-08-07
JPH09509911A (en) 1997-10-07
CA2184066A1 (en) 1995-09-14
DE69500562D1 (en) 1997-09-18
EP0749384B1 (en) 1997-08-13
NO963455L (en) 1996-08-20
FR2717148B1 (en) 1996-07-12

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