EP2435295B1 - System zum bergen und ziehen eines untergetauchten objekts, insbesondere einer seemine - Google Patents

System zum bergen und ziehen eines untergetauchten objekts, insbesondere einer seemine Download PDF

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Publication number
EP2435295B1
EP2435295B1 EP10727771A EP10727771A EP2435295B1 EP 2435295 B1 EP2435295 B1 EP 2435295B1 EP 10727771 A EP10727771 A EP 10727771A EP 10727771 A EP10727771 A EP 10727771A EP 2435295 B1 EP2435295 B1 EP 2435295B1
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Prior art keywords
inflatable
inflation line
gas
upstream
downstream
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EP10727771A
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English (en)
French (fr)
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EP2435295A1 (de
Inventor
Alain Desmoulins
Patrick Fosse
Jean-Luc Pardos
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Service Industrie Marine
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Service Industrie Marine
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    • 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
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/52—Tools specially adapted for working underwater, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G7/00—Mine-sweeping; Vessels characterised thereby
    • B63G7/02—Mine-sweeping means, Means for destroying mines

Definitions

  • the present invention relates to a system for recovering an immersed object and more specifically to a system for remote inflation and towing of an immersed object lifting structure and its use, preferably on board a boat, for the lifting and towing of an immersed object, for example an aquatic mine or a torpedo.
  • the present invention also relates to a method or method for recovering such an object.
  • a first known method consists in securing the object with a towing cable or the like and removing it from the water by pulling the cable from the bank and using a vehicle, such as a truck, tow truck or the like. This method is used to remove vehicles from waterways. However, it is understood that this method quickly finds its limits when the object exceeds a certain weight, when its immersion exceeds a certain depth or when the object is immersed too far from the edge and / or in a place only accessible by boat.
  • a second known method, in particular described by the document US Patent 5689086 is to use a boat to tow the object.
  • This method overcomes some of the disadvantages above but is not ideal because the boat may encounter difficulties during towing, especially when the object is partially buried in the mud, is caught between rocks making his traction difficult or when the seabed is very irregular.
  • this method is not or difficult to use, when the object is fragile or has a risk of explosion, for example when the object to be recovered is a submarine aquatic mine.
  • a third known method consists in using one or more inflatable object lifting structures, for example submarine bags or parachutes, which are immersed, secured to the object to be picked up by one or several on-site divers and then inflated. by them with air or another gas. Once inflated, under the effect of buoyancy, the structures or structures filled with gas will cause the object to the surface where it can be recovered on board a boat or the like.
  • This method also has disadvantages. First, to be able to recover the object, the boat must be able to approach the site where the inflatable structures connected to the object have surfaced.
  • the problem to be solved is therefore to propose an improved system for recovering an immersed object, in particular an object presenting risks of explosion or bodily injury for the divers (s) likely to be present on the site, in particularly useful for the recovery of aquatic mines, torpedoes or the like.
  • the solution of the invention is therefore based on an inflation and remote towing system of an inflatable lifting structure of an immersed object and its use on board a vehicle, preferably on board a boat, such as a surface vessel, a boat, a barge or the like, for the lifting and towing of various submerged objects, including aquatic mines, torpedoes or the like.
  • the system of the invention can be used up to depths of up to about 80 meters in an underwater and / or hostile environment.
  • an object 32 to be recovered such as an aquatic mine
  • one or more divers are sent to the site where they have a sort of net or the like around the immersed object 32.
  • the net or the like is secured to an inflatable object lifting unit 31, such as a balloon, an aquatic parachute or the like, which is, sometimes but not always, slightly pre-inflated by the plunger (s) by means of a self-contained gas reserve; they take with them.
  • an object recovery system intended to be implemented preferentially on a boat, comprises one (or several) sections of 100 and 200 meters long, for example, comprising, on the one hand, a line of inflation 1 for conveying a pressurized gas from the boat 30, that is to say a boat, a barge, a naval surface vessel or the like, on which the system according to the present invention is installed until to the inflatable lifting unit 31 of object, such as a balloon, an aquatic parachute or the like which is secured to the object to be recovered, and secondly, means or a traction line 2, such as a cable steel for example, for pulling the inflatable unit 31 lifting connected to the submerged object 32, after possibly extracted said object from the vase or the like.
  • a line of inflation 1 for conveying a pressurized gas from the boat 30, that is to say a boat, a barge, a naval surface vessel or the like, on which the system according to the present invention is installed until to the inflatable lifting unit 31 of object, such as a balloon, an aquatic parachute or the like which
  • the system according to the present invention is stored being preferably wound or wound (in 7) on a dispensing device 5, namely here a rotating drum.
  • FIGS. 2A and 2B schematize two embodiments of an immersed object recovery system according to the invention comprising an inflation line 1 which is in fact a flexible conduit or the like for conveying gas having sufficient strength not to break during its use, securing means 2a, 2b and connectors 11a, 11b located at the downstream ends 11a and upstream 11b, respectively, of said inflation line 1.
  • Figure 8 is a diagram of a preferred embodiment according to the invention of the structure of the inflation lines 1 and traction 2.
  • the inflation line 1 and the traction line 2 comprise a first l 'and a second 2 'hollow and flexible tube, which are secured to one another in a single structure (section) shaped "8" in this case.
  • the first tube 1 'forming the inflation line 1 serves to convey the air (direction of the arrows) which is used to fill the inflatable lifting unit, while the second tube 2' comprises a cable 2 "capable of sliding at the inside of said second tube 2 'so as to be able to absorb variations in the traction force applied to said cable 2 ", especially when the boat is moving because of a rough sea for example.
  • the cable 2 " is equipped, as illustrated in Figure 2A , downstream securing means 2a and upstream 2b for hanging the structure (section) formed by the inflation lines 1 and traction 2 either to the boat and to the lifting unit, directly or indirectly (via the lyres for example ), to fix several structures or sections between them.
  • the cable 2 "provided with its downstream securement means 2a and upstream 2b has a length less than the length of the line of inflation 1, preferably a difference in length of several meters, for example from 2 to 6 meters, so that it is always the cable 2 "which is stretched and subjected to traction and not the inflation line 1 which is more fragile therefore likely to break more easily.
  • damping device 34 that can be inserted between the cable 2" of the system of the invention and the boat, such as the one illustrated in FIG. Figure 6 .
  • This damping device 34 absorbs shocks that may occur on the cable 2 ", especially in rough sea.
  • downstream securing means 2a and upstream 2b may comprise hooking loops 12a, 12b, for example of the carabiner type or the like, or fixed independently of one another to the outer wall of the line 1 (Fig. 1B), located at the ends of a common connecting cable 2 forming a traction line 2 (Fig. 1A).
  • securing means 2a, 2b serve to connect the inflation line 1 to the other elements of the system, including the lyres 6, 7, as explained below.
  • the inflation line 1 comprises an upstream end 1b and a downstream end 1a, respectively, and may be formed of one or more sections fluidly connected to each other through the connectors 11a, 11b, so as to ensure a continuity of the air flow from the boat 30 to the lifting unit 31 inflatable.
  • the securing means 2a, 2b can also serve to connect several cables 2 "between them.
  • an upstream lyre 6 comprises, on the one hand, two input branches 21, 22 each connected to one of the gas sources and each equipped with a gas expander device 23, 24 and, on the other hand, an output branch 20 fluidly connected to the two input branches 21, 22 and to the upstream end 1b of the inflation line 1.
  • the two input branches 21, 22 comprise non-return valves 25.
  • downstream end 1a of the inflation line 1 is fluidly connected to the immersed object lifting unit 31, either directly using the connectors 11a, or indirectly via a device downstream connecting piece 7, also called “downstream lyre 7", comprising an internal gas circuit equipped with nonreturn valve means 25.
  • the gas circuits of the lyres 6 and 7 are preferably formed, in whole or in part, flexible or flexible gas conduits or ducts.
  • the upstream end 1b of the inflation line 1 of the first section is connected as in the previous case to the source or sources of gas under pressure of the boat 30, while the downstream end 1a of the inflation line 1 of this first section is fluidly connected to the upstream end 1b of the inflation line 1 of the second section and is the downstream end 1a of the inflation line 1 of the second section that comes, this time, connect fluidly to the lifting unit 31 of submerged object
  • the different sections are connectable to each other via connectors 11a, 11b adapted.
  • connectors 11a, 11b adapted.
  • the upstream lyre 6 and downstream 7 are then fluidically connected respectively to the first and last sections of a succession of sections thus formed.
  • the sections may be of the same length or have different lengths, for example the first section may have a length of 200 m and the subsequent sections a length of 100 m each.
  • the section or sections simultaneously provide inflation and towing functions.
  • several sections having different lengths on the side of the lifting unit 31 are provided in such a way as to be able to adapt the total length of the inflation line 1 to each particular case, that is to say in such a way as to take into account more or less large intervention depths.
  • the system of the invention is preferably implemented from a boat, that is to say a boat, a barge or the like, being connected to one or more sources of compressed air carried by said boat 30 so as to inflate an inflatable flexible lifting unit 31, open or closed, for example a pocket or an inflatable balloon or an aquatic parachute, intended to allow, under the effect of buoyancy, to rise to the surface or near the surface a submerged load 32, such as an aquatic mine, a torpedo, a wreck or other.
  • This submerged load 32 can then be towed by the boat 30 itself using the system of the invention since it comprises, on the one hand, downstream securing means 2, 2a, 12a allowing a mechanical stowage from the inflating line 1 to the inflatable lifting unit 31 of gas-fired object through the inflating line 1 and, secondly, upstream securing means 2, 2b, 12b allowing a mechanical stowage of the inflation line 1 at an anchor point present on the boat 30, as shown schematically on the Figures 1 , 2A and 2B .
  • the submerged load 32 can also be towed by a lighter craft, such as a Zodiac-type inflatable boat, or even by a land vehicle.
  • a lighter craft such as a Zodiac-type inflatable boat
  • the upstream securement means 2b will be hung on the light craft or on the vehicle, which may also be equipped with a pressurized air source enabling the inflatable unit to be fed, if necessary. with in particular a supplement of air via the inflation line; it is also possible to use a (or) open sheave system on the shore to reduce the length of line to tow, especially when the shore on which the load must dock, is small.
  • a successive use of several different types of vehicles can also be considered for example first a surface vessel to raise the load to the surface then pull it up to a few hundred meters from the side, then a light Zodiac boat or a land motor vehicle to tow the object to the shore.
  • the inflation line 1 can be stored by being wound on a rotary drum 5 for its storage or, conversely, its rapid deployment and easy.
  • the inflation line section (s) 1 used are fully unwound and the corresponding reel (s) 5 are separated from the working zone. Indeed, in this case, as a towing of the object 32 by the boat 30 must take place, it is not possible to leave an inflation line 1 partially wound on a drum 5 to avoid a deterioration of this- This is because of the tensile forces that will be exercised there.
  • the towed load may require a continuous traction force of 2000 daN.
  • the most upstream section that is to say the one on the side of the source or sources of pressurized air, can remain housed on its own drum 5.
  • all the components used to produce the system of the invention are weakly amagnetic.
  • brass, aluminum alloys, stainless steel or non-metallic materials may be used if they are resistant to the conditions of use
  • a complete line may be formed of a section of 200 meters, two additional sections of 100 meters each, an upstream lyre 6 of 2 meters and a downstream lyre 7 of 6 meters.
  • an acoustic disturbance attenuation device is provided to limit the acoustic disturbances near the lifting unit 31, during the pressurization of the inflation line 1.
  • the section or sections thus simultaneously provide the functions of inflation and traction / towing.
  • They comprise a single flexible element ensuring the two functions, that is to say the inflation line 1 and the securing means 2a, 2b, in particular the traction line 2 and its protective envelope 2 'containing the sliding cable 2
  • the securing means 2a, 2b carried by, for example, a steel cable about 8 mm in diameter, and located at the ends of each section, that is to say on the structure comprising the inflation line 1 and / or on the lyres 6, 7, allow downstream the load to be towed 32 and to fix upstream the inflation line 1 to the boat 30 or the vehicle for towing.
  • the upstream connections fitted to the sections are blocked to allow any disconnection without loss of gas in the lifting unit, as for example during the installation of an additional section during a lifting operation in progress after isolation of the source of power. 'air.
  • a quick release device is set up by the user on the upstream attachment point of the upstream section, it is connected by the user to the towing end attached to the boat. After disconnecting the upstream lyre 6, it allows the user to quickly drop the complete power line in case of difficulty encountered during operations.
  • the drum or reels 5, equipped with their respective sections, are intended for the storage and implementation of the sections, in particular the adjustment of the unrolled length.
  • the downstream fitting is easily stowed on the drum when the section is fully coiled.
  • the design of the frame of the drum facilitates its docking with the boat
  • the upstream lyre 6 with a total length of the order of 2 m for example, is intended to connect upstream line 1 which it belongs to one or two sources of air under pressure. It is equipped with 2 regulators 23, 24, one dedicated to each source, to limit the pressure in the line 1 to a value compatible with the resistance of the hose constituting said line 1, with the easy implementation of the pressurized quick connectors and with the expected airflow.
  • the air sources to which the upstream lyre 6 is connected require the presence of "caliper" type connections in accordance with ISO 12209-1 (230 bar) for connection to diving blocks (maximum pressure of 200 bar) or express type according to standard NF E 29-573 for connection to an air compressor (maximum pressure of 10 bar).
  • the replacement of an air source by another of the same type or of a different type can be carried out during a current lifting operation, thanks to the presence of non-return valves 25 and a purge device.
  • the high-pressure parts are advantageously equipped with anti-whip safety cable.
  • downstream lyre 7 is preferably available in several lengths, for example 0.5 m, 3 m and 6 m approximately) and allows to connect, downstream, the inflation line 1 of which it is part to the unit of lift 31, via a male connector or an express coupling.
  • a check valve type device 25 within the downstream lyre 7 prevents any loss of pressure of the lifting unit 31 in case of accidental rupture of a section.
  • downstream lyre 7 has securing devices 7a, 7b (only one in the case of the length 0.5 m) located about 25 cm from each connection to allow its lashing by end of 5 mm (effort maximum traction of 5 daN)
  • the gas pressure in the inflation line is generally of the order of 5 to 7 bar, but other pressures are obviously usable, including pressures of 7 to 10 bar.
  • This pressure serves to inflate the lifting unit at a pressure slightly above atmospheric pressure, for example the gaseous pressure is about 0.5 bar or about 1.5 bar in the inflatable unit.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Claims (10)

  1. Bergungs- und Zugsystem für einen versenkten Gegenstand (32), das an einem Fahrzeug, insbesondere einem Wasserfahrzeug (30) verwendet werden kann, Folgendes umfassend:
    - eine Aufblasleitung (1), die ein Gas aus mindestens einer Gasquelle zu mindestens einer aufblasbaren Gegenstandshebeeinheit (31) leiten kann, wobei die Aufblasleitung (1) ein vorderes Ende (1 b), das dazu bestimmt ist, fluidtechnisch an die mindestens eine Gasquelle angeschlossen zu werden, und ein hinteres Ende (1a) umfasst, das dazu bestimmt ist, fluidtechnisch an die mindestens eine aufblasbare Gegenstandshebeeinheit angeschlossen zu werden, um die mindestens eine aufblasbare Gegenstandshebeeinheit mit Gas zu versorgen, das von der mindestens einen Gasquelle geliefert und durch die Aufblasleitung (1) geleitet wird,
    - hintere Kopplungseinrichtungen (2a, 7a, 7b), die ein mechanisches, direktes oder indirektes Koppeln der Aufblasleitung (1) an der mindestens einen, mit Gas aus der Aufblasleitung (1) versorgten, aufblasbaren Gegenstandshebeeinheit (31) ermöglichen, und
    - vordere Kopplungseinrichtungen (2b), die ein mechanisches, direktes oder indirektes Koppeln der Aufblasleitung (1) an einem auf dem Fahrzeug (30) vorhandenen Verankerungspunkt ermöglichen,
    - wobei sich die hinteren Kopplungseinrichtungen (2a) und die vorderen Kopplungseinrichtungen (2b) am hinteren (2a) bzw. vorderen (2b) Ende einer Zugleitung (2) befinden, wobei die Zugleitung (2) ein Seil (2") umfasst,
    dadurch gekennzeichnet, dass:
    - die Aufblasleitung (1) und die Zugleitung (2) eine erste (1') und eine zweite (2'), hohle und flexible Röhre umfassen, die aneinander befestigt sind, wobei die erste Röhre (1') dazu dient, Gas zu leiten, und die zweite Röhre (2') das Seil (2") enthält, das im Inneren der zweiten Röhre (2') vorgesehen ist und im Inneren der zweiten Röhre (2') gleiten kann.
  2. Bergungssystem nach Anspruch 1, dadurch gekennzeichnet, dass die hinteren Kopplungseinrichtungen (2a) und die vorderen Kopplungseinrichtungen (2b) fest an der Aufblasleitung (1) fixiert sind.
  3. Bergungssystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das vordere Ende (1b) und das hintere Ende (1a) der Aufblasleitung (1) jeweils einen Verbinder (11a; 11b) umfassen, der in der Lage und dazu konzipiert ist, den fluidtechnischen Anschluss der Aufblasleitung (1) zu ermöglichen.
  4. Bergungssystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Aufblasleitung (1) und die Zugleitung (2) eine erste (1') und eine zweite (2'), hohle und flexible Röhre umfassen, die zueinander parallel und aneinander befestigt unter Bildung einer Struktur angeordnet sind, die im Schnitt die Form einer "8" hat.
  5. Bergungssystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Aufblasleitung (1) aus mehreren aneinandergefügten Teilstücken, wobei vorzugsweise jedes Teilstück einen Abschnitt der Aufblasleitung (1) umfasst, und den hinteren Kopplungseinrichtungen (2a) und den vorderen Kopplungseinrichtungen (2b) gebildet ist, wobei es die hinteren Kopplungseinrichtungen (2a) ermöglichen, die Teilstücke untereinander oder mit einer aufblasbaren Hebeeinheit mechanisch zu verbinden, und es die vorderen Kopplungseinrichtungen (2b) ermöglichen, die Teilstücke untereinander und mit einem Verankerungspunkt des Fahrzeugs mechanisch zu verbinden.
  6. Bergungssystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das vordere Ende (1 b) der Aufblasleitung (1) fluidtechnisch an mindestens eine Gasquelle mittels einer vorderen Anschlussvorrichtung (6) angeschlossen wird, die einen Gaskreislauf (20, 21, 22) umfasst, der mit mindestens einer Gasdruckminderungsvorrichtung (23, 24) ausgestattet ist, der Gaskreislauf (20, 21, 22) vorzugsweise zwei Eintrittsstränge (21, 22), die jeweils an eine Gasquelle angeschlossen und jeweils mit einer Gasdruckminderungsvorrichtung (23, 24) ausgestattet sind, und einen Austrittsstrang (20) aufweist, der fluidtechnisch mit den zwei Eintrittssträngen und dem vorderen Ende (1 b) der Aufblasleitung (1) verbunden ist.
  7. Bergungssystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das hintere Ende (1a) der Aufblasleitung (1) fluidtechnisch an eine Gegenstandshebeeinheit mittels einer hinteren Anschlussvorrichtung (7) angeschlossen wird, die einen Gaskreislauf umfasst, der mit einer Rückschlagventileinrichtung (25) ausgestattet ist.
  8. Bergungsanordnung für einen versenkten Gegenstand, ein Wasserfahrzeug umfassend, das mindestens eine Druckgasquelle und mindestens eine aufblasbare Hebeeinheit für den versenkten Gegenstand umfasst, dadurch gekennzeichnet, dass sie darüber hinaus ein Bergungssystem nach einem der vorhergehenden Ansprüche umfasst, wobei das Bergungssystem:
    - so über die Aufblasleitung (1) fluidtechnisch mit der mindestens einen Druckgasquelle und der mindestens einen aufblasbaren Hebeeinheit verbunden ist, dass die aufblasbare Hebeeinheit mit Druckgas versorgt wird, das von der mindestens einen Gasquelle geliefert wird, und
    - mechanisch mit der aufblasbaren Hebeeinheit und mindestens einem vom Wasserfahrzeug bereitgestellten Kopplungspunkt verbunden ist.
  9. Bergungsverfahren für einen in einem Gewässerumfeld, insbesondere im Meer versenkten Gegenstand, wobei
    a) eine Bergungseinheit nach Anspruch 8 eingesetzt wird,
    b) die aufblasbare Hebeeinheit am zu bergenden, versenkten Gegenstand befestigt wird,
    c) die mindestens eine Druckgasquelle mittels der Aufblasleitung (1) fluidtechnisch an die aufblasbare Hebeeinheit angeschlossen wird,
    d) die aufblasbare Hebeeinheit mittels der hinteren Kopplungseinrichtungen (2a) und der vorderen Kopplungseinrichtungen (2b) mechanisch an mindestens einen vom Wasserfahrzeug bereitgestellten Kopplungspunkt angeschlossen wird,
    e) ein zumindest teilweises Aufblasen der aufblasbaren Hebeeinheit mit Druckgas bewerkstelligt wird, das von mindestens einer dass dem Wasserfahrzeug befindlichen Gasquelle geliefert und durch die Aufblasleitung (1) geleitet wird,
    f) und nötigenfalls ein mechanischer Zug auf die aufblasbare Hebeeinheit in Richtung auf das Wasserfahrzeug mittels der hinteren Kopplungseinrichtungen (2a) und der vorderen Kopplungseinrichtungen (2b) ausgeübt wird.
  10. Bergungsverfahren nach Anspruch 9, dadurch gekennzeichnet, dass der versenkte, zu bergende Gegenstand (32) eine Wassermine ist.
EP10727771A 2009-05-26 2010-05-07 System zum bergen und ziehen eines untergetauchten objekts, insbesondere einer seemine Active EP2435295B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0953432A FR2946007A1 (fr) 2009-05-26 2009-05-26 Systeme de recuperation et de traction d'un objet immerge, notamment une mine aquatique.
PCT/FR2010/050889 WO2010136693A1 (fr) 2009-05-26 2010-05-07 Système de récupération et de traction d'un objet immergé, notamment une mine aquatique

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EP2435295A1 EP2435295A1 (de) 2012-04-04
EP2435295B1 true EP2435295B1 (de) 2013-03-20

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CN103171746B (zh) * 2011-12-26 2015-07-29 中国科学院沈阳自动化研究所 一种自治水下航行器的布放回收装置
CN103183113B (zh) * 2011-12-28 2015-06-10 中国科学院沈阳自动化研究所 一种水下机器人回收系统及其回收方法
CN103183112B (zh) * 2011-12-28 2015-06-10 中国科学院沈阳自动化研究所 一种水下机器人回收用对接起吊装置
CN111806647B (zh) * 2020-09-07 2020-12-11 山东省海洋资源与环境研究院(山东省海洋环境监测中心、山东省水产品质量检验中心) 一种船用海洋调查仪器的抛放装置
CN114260924B (zh) * 2022-03-01 2022-05-03 广东海洋大学 一种水下机械手

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US1531433A (en) * 1923-09-28 1925-03-31 Carr Uriel Artemus Means for raising sunken vessels
US4078509A (en) * 1976-05-27 1978-03-14 The United States Of America As Represented By The Secretary Of The Navy Salvage apparatus and method
US4498408A (en) * 1981-07-17 1985-02-12 Aquastat Ab Lifting body for diving
JPH07509419A (ja) * 1991-01-25 1995-10-19 コントロールド・リフティング・インターナショナル・リミテッド 海底から物体を引き揚げる方法
GB9512285D0 (en) * 1995-06-16 1995-08-16 Rover Group A pipe assembly
US5689086A (en) 1996-05-20 1997-11-18 The United States Of America As Represented By The Secretary Of The Navy Simulated suspended mine retrieval system
EP2212511A4 (de) * 2007-10-17 2015-04-01 Collin Morris Förderrohrglied mit zusatzleitung

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WO2010136693A1 (fr) 2010-12-02
FR2946007A1 (fr) 2010-12-03

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