WO2011019290A2 - Device for collecting objects from the seabed - Google Patents

Device for collecting objects from the seabed Download PDF

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Publication number
WO2011019290A2
WO2011019290A2 PCT/NO2010/000307 NO2010000307W WO2011019290A2 WO 2011019290 A2 WO2011019290 A2 WO 2011019290A2 NO 2010000307 W NO2010000307 W NO 2010000307W WO 2011019290 A2 WO2011019290 A2 WO 2011019290A2
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WO
WIPO (PCT)
Prior art keywords
living organisms
sea
seabed
nozzle
suction
Prior art date
Application number
PCT/NO2010/000307
Other languages
French (fr)
Other versions
WO2011019290A3 (en
Inventor
Are Hofstad
Original Assignee
Are Hofstad
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 Are Hofstad filed Critical Are Hofstad
Publication of WO2011019290A2 publication Critical patent/WO2011019290A2/en
Publication of WO2011019290A3 publication Critical patent/WO2011019290A3/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K80/00—Harvesting oysters, mussels, sponges or the like

Definitions

  • the present invention regards an apparatus for collecting objects from the seabed and more particularly harvesting of seabed living animals.
  • Background of the invention :
  • Seabed-living animals are harvested in numerous ways around the world.
  • the most common methods of harvesting such animals are either hazardous to the environment like dredges, trawling etc., or they are potentially dangerous and/or non-cost efficient like hand-picking by divers.
  • US Patent 6,343,433 Bl describes an apparatus and a method for separating target and non-target species harvested from waterbodies.
  • the objects are transported to the surface unit in a pressurized hose or pipe.
  • This patent uses a suction chamber, filtration device, storage device and exhaust opening. However, these devices are always located on the surface unit and the harvesting itself is performed randomly.
  • US Patent US 2003/0172557 Al describes an apparatus for dredging shellfish using a refined method of the known dredging/suction method. Using a two-compartment pressure chamber where a water jet from the surface vessel first is used to increase the stream of water/shellfish mix, and then by using pressurized air in the next compartment to increase the speed and power stream to the surface.
  • This patent is also describing a system where the harvest is performed randomly by dredging the sled on the seabed
  • DK 200700077 U2 describes an apparatus for selective harvesting of organisms living on the seabed. This patent is uses suction to harvest the organisms, and that it utilizes a camera and a monitor to view the seabed and decide when the suction pipe is to be lowered to the seabed.
  • the suction pipe is guided using a stiff rod which makes it less maneuverable.
  • the invention has limited operability as it needs to be able to lift the organisms to the surface using suction. Operating the apparatus near vertical rocks in waves would be to the operators risk as the surface vessel needs to be very close to shore, and operating the apparatus in waves would anyway make the harvesting operation very difficult as both the surface vessel and the suction nozzle will be moving due to the wave motion making harvesting difficult. All these methods are fairly damaging for the seabed. Moreover, transporting e.g.
  • scallops to the surface from 25-35 meters dept in a 15-25 cm diameter hose would be extremely sensitive to current forces. Moreover, this would impose stress and rough treatment to the animals. Particularly sea urchins are very sensitive to this.
  • the present invention relates to a device operated from a surface vessel using sub-sea cameras and a surface monitor to visually follow/guide the device, to harvest animals using suction produced by a pump or an electric thruster.
  • the device can be installed either on a free floating ROV operated through a power/signal umbilical, or it can be located directly on the surface vessel for harvesting in very shallow areas. In the latter case, the suction nozzle/pipe and camera will be installed on a hydraulically operated arm that can be operated from the surface vessel by an operator similar to the operation of the ROV.
  • the animals such as sea urchins, scallops, cockles, sea cucumbers, whelks,
  • the main feature with this patent application is that all harvesting is performed on specific targets using a camera on the harvesting device and that the operator can maneuver the suction nozzle to the desired target based on what he sees on the monitor on the surface vessel. Hence no separation is required as selection is performed before the target is harvested. Moreover, an important feature is that the present invention is a device that will not harm the seabed in the same way a trawl/dredge would do.
  • Figure 1 is a schematic plan of the complete system with surface vessel, umbilical and the harvesting apparatus installed on an ROV.
  • Figure 2 is a schematic side view of the harvesting apparatus describing the
  • Figure 3 is a schematic rear view of the suction pump/ thruster and the horizontal exhaust manifold.
  • Figure 4a is a schematic side view of the nozzle used for shellfish living in the seabed.
  • Figure 4b is a schematic front view of the nozzle used for shellfish living in the seabed.
  • Figure 5 is a schematic side view of the system of the variable buoyancy to compensate for heavy load.
  • Figure 6 is a schematic view of the system installed directly in the surface vessel without using the ROV but using a hydraulic manipulator arm to reach the seabed. Detailed description
  • FIG. 1 gives a view of a first and preferred embodiment of the present invention.
  • the device 1 is mounted on a Remotely Operated Vehicle 2, ROV, which is connected to a vessel 4 via an umbilical 3.
  • ROV Remotely Operated Vehicle
  • the system works as the operator is maneuvering the ROV from the surface vessel 4 by the use of cameras on the ROV 2, monitors and a control system of joysticks for operating the ROV and buttons for operating the harvesting system.
  • FIG. 2 shows a purpose built Remotely Operated Vehicle 2, ROV, fitted with a harvesting device 1 consisting of a nozzle, an inclined suction pipe/hose 5, a water- filtering container/box 7, a suction chamber 6, a suction pump or thruster 8 installed inside a vertical pipe 9 and an exhaust manifold 10.
  • a camera 16 is installed close to the nozzle in order to get a good view of the items to be collected.
  • An additional camera 16 is further installed in the suction chamber 6 to monitor the amount of collected sea-living organisms.
  • the ROV 2 is first deployed from the surface vessel 4 when the right location is reached. In order to submerge the device 1 , mounted on the ROV 2, the system is purged by running the thruster 8 in reverse causing the suction chamber 67 to be filled with water.
  • the air inside the suction chamber 6 may escape through the non-return valve 11 located on the highest point of the suction chamber in order to completely remove all air.
  • the operator can see the amount of harvested animals using the camera 16 fitted in the suction chamber 6. When the box is full, the operator will take the ROV 2 to the surface to have it offloaded and a new box 7 will be installed before the harvest can continue.
  • the thruster 8 will remove water from the suction chamber 6 and out of the exhaust manifold 10. This will produce a vacuum in the chamber 6 and hence suction in the suction pipe 5.
  • the sea-living organism will be transported through the inclined suction pipe 5 and into the box 7 in the suction chamber 6. Here it will have the velocity significantly reduced as the area is increasing.
  • the water will be filtered through the filter/box 7 whilst the sea-living organism will remain there.
  • Figure 3 shows a cross section rear view of the exhaust system 10 where it can be seen that the exhaust is directed horizontally to ensure that we avoid that bottom sediments may reduce the visibility for the operator.
  • FIG 4a and 4b shows a cross sectional detailed side view and top view of the nozzle 12 and the suction pipe 5.
  • a lifting device 13 shaped as a hand with fingers is fitted to lift the scallop slightly from the seabed to avoid excessive suction of sand and other seabed sediments.
  • This nozzle is particularly effective if the sea-living organism that is to be collected is e.g. scallops which can be partially or completely submerged in the seabed.
  • the suction pipe 5 may also be shaped as the profile of a scallop in order to reduce the risk of the scallop falling back to the nozzle 12.
  • a custom built nozzle 12 will be used that increases the efficiency of the harvest.
  • a flexible hose will be sufficient as harvesting is mainly performed on a rocky, un-even surface.
  • the nozzle will be significantly wider than for scallops as the operator is not aiming to harvest one particular individual, but all individuals in a specified sector or area. As the cockles are smaller than scallops, the height of the nozzle can be reduced. In order to retrieve the cockles, a number of fingers are used to cut the seabed and to lift them up so that they can be vacuumed into the suction pipe.
  • FIG. 5 shows that depending on which sea-living organism that is the aim of the harvest, a system of variable ballast is fitted.
  • This system consists of two ballast tanks 15 that are normally filled with water. If needed to maintain slightly positive buoyancy, compressed air will be let into the tanks, forcing the water out and hence adding buoyancy.
  • This is a system that is possible to use when harvesting species with specific density above 1.0, particularly scallops and other heavier shells.
  • Figure 6 shows the device mounted on the end of a remotely operated manipulator arm 17 which is located on a surface vehicle.
  • the surface vehicle is further provided with means for controlling the arm and device. This is done via controls, either mounted on the arm, or connected to the arm either via cable or wireless.
  • the nozzle and suction hose are connected to the arm whilst the suction pump and the filtration device are located on the boat.
  • the arm is further fitted with a camera to make it possible to see where to control the arm.
  • the storage box When operating without the ROV, the storage box is to be removed from the suction chamber when full, inserting a new box and continuing the harvesting.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Removal Of Floating Material (AREA)
  • Catching Or Destruction (AREA)
  • Cleaning Or Clearing Of The Surface Of Open Water (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Mechanical Means For Catching Fish (AREA)

Abstract

A device for collecting objects from the seabed or near seabed using a Remotely Operated Vehicle (ROV) or an hydraulic arm controlled from a surface vehicle characterized by that said device is installed on a ROV/hydraulic arm and consists of a nozzle, a suction chamber, an under-pressure pump and an exhaust system, and uses suction to collect said objects, and has a nozzle specially constructed for collecting a specific object.

Description

Device for collecting objects from the seabed Technical Field
The present invention regards an apparatus for collecting objects from the seabed and more particularly harvesting of seabed living animals. Background of the invention:
Seabed-living animals are harvested in numerous ways around the world. The most common methods of harvesting such animals are either hazardous to the environment like dredges, trawling etc., or they are potentially dangerous and/or non-cost efficient like hand-picking by divers. Numerous attempts has been made to increase the harvesting efficiency of such animals but common for most of these is that they either are hazardous to the seabed, they can potentially damage the objects of harvest or they are complex and thereby expensive to manufacture and/or to operate.
US Patent 6,343,433 Bl describes an apparatus and a method for separating target and non-target species harvested from waterbodies. The objects are transported to the surface unit in a pressurized hose or pipe. This patent uses a suction chamber, filtration device, storage device and exhaust opening. However, these devices are always located on the surface unit and the harvesting itself is performed randomly.
US Patent US 2003/0172557 Al describes an apparatus for dredging shellfish using a refined method of the known dredging/suction method. Using a two-compartment pressure chamber where a water jet from the surface vessel first is used to increase the stream of water/shellfish mix, and then by using pressurized air in the next compartment to increase the speed and power stream to the surface. This patent is also describing a system where the harvest is performed randomly by dredging the sled on the seabed DK 200700077 U2 describes an apparatus for selective harvesting of organisms living on the seabed. This patent is uses suction to harvest the organisms, and that it utilizes a camera and a monitor to view the seabed and decide when the suction pipe is to be lowered to the seabed. However, the suction pipe is guided using a stiff rod which makes it less maneuverable. Moreover, the invention has limited operability as it needs to be able to lift the organisms to the surface using suction. Operating the apparatus near vertical rocks in waves would be to the operators risk as the surface vessel needs to be very close to shore, and operating the apparatus in waves would anyway make the harvesting operation very difficult as both the surface vessel and the suction nozzle will be moving due to the wave motion making harvesting difficult. All these methods are fairly damaging for the seabed. Moreover, transporting e.g.
scallops to the surface from 25-35 meters dept in a 15-25 cm diameter hose would be extremely sensitive to current forces. Moreover, this would impose stress and rough treatment to the animals. Particularly sea urchins are very sensitive to this.
Summary of the invention The present invention, as described in the independent claims, relates to a device operated from a surface vessel using sub-sea cameras and a surface monitor to visually follow/guide the device, to harvest animals using suction produced by a pump or an electric thruster.
The device can be installed either on a free floating ROV operated through a power/signal umbilical, or it can be located directly on the surface vessel for harvesting in very shallow areas. In the latter case, the suction nozzle/pipe and camera will be installed on a hydraulically operated arm that can be operated from the surface vessel by an operator similar to the operation of the ROV.
The animals, such as sea urchins, scallops, cockles, sea cucumbers, whelks,
langoustines a.o., are hence transported through the inlet nozzle and suction pipe into the under-pressurized chamber where the animals are contained whilst the water is filtered through the perforated storage box and pumped out through the exhaust opening.
The main feature with this patent application is that all harvesting is performed on specific targets using a camera on the harvesting device and that the operator can maneuver the suction nozzle to the desired target based on what he sees on the monitor on the surface vessel. Hence no separation is required as selection is performed before the target is harvested. Moreover, an important feature is that the present invention is a device that will not harm the seabed in the same way a trawl/dredge would do. Brief description of the drawings
Figure 1 is a schematic plan of the complete system with surface vessel, umbilical and the harvesting apparatus installed on an ROV.
Figure 2 is a schematic side view of the harvesting apparatus describing the
water/animal flow from the suction nozzle through the filtering box, through the pump/thrusters and out the horizontal water exhaust manifold.
Figure 3 is a schematic rear view of the suction pump/ thruster and the horizontal exhaust manifold.
Figure 4a is a schematic side view of the nozzle used for shellfish living in the seabed. Figure 4b is a schematic front view of the nozzle used for shellfish living in the seabed.
Figure 5 is a schematic side view of the system of the variable buoyancy to compensate for heavy load.
Figure 6 is a schematic view of the system installed directly in the surface vessel without using the ROV but using a hydraulic manipulator arm to reach the seabed. Detailed description
Figure 1 gives a view of a first and preferred embodiment of the present invention. Here the device 1 is mounted on a Remotely Operated Vehicle 2, ROV, which is connected to a vessel 4 via an umbilical 3. The system works as the operator is maneuvering the ROV from the surface vessel 4 by the use of cameras on the ROV 2, monitors and a control system of joysticks for operating the ROV and buttons for operating the harvesting system.
A similar maneuvering system is used when operating the system without the ROV as shown in figure 6.
Figure 2 shows a purpose built Remotely Operated Vehicle 2, ROV, fitted with a harvesting device 1 consisting of a nozzle, an inclined suction pipe/hose 5, a water- filtering container/box 7, a suction chamber 6, a suction pump or thruster 8 installed inside a vertical pipe 9 and an exhaust manifold 10. In addition a camera 16 is installed close to the nozzle in order to get a good view of the items to be collected. An additional camera 16 is further installed in the suction chamber 6 to monitor the amount of collected sea-living organisms.
The ROV 2 is first deployed from the surface vessel 4 when the right location is reached. In order to submerge the device 1 , mounted on the ROV 2, the system is purged by running the thruster 8 in reverse causing the suction chamber 67 to be filled with water.
The air inside the suction chamber 6 may escape through the non-return valve 11 located on the highest point of the suction chamber in order to completely remove all air.
When the operator locates an animal that is to be harvested he places the suction pipe 5 intake, or the nozzle if fitted, just above the animal and starts the thruster.
The operator can see the amount of harvested animals using the camera 16 fitted in the suction chamber 6. When the box is full, the operator will take the ROV 2 to the surface to have it offloaded and a new box 7 will be installed before the harvest can continue.
The thruster 8 will remove water from the suction chamber 6 and out of the exhaust manifold 10. This will produce a vacuum in the chamber 6 and hence suction in the suction pipe 5. The sea-living organism will be transported through the inclined suction pipe 5 and into the box 7 in the suction chamber 6. Here it will have the velocity significantly reduced as the area is increasing. The water will be filtered through the filter/box 7 whilst the sea-living organism will remain there.
Figure 3 shows a cross section rear view of the exhaust system 10 where it can be seen that the exhaust is directed horizontally to ensure that we avoid that bottom sediments may reduce the visibility for the operator. Further figure 4a and 4b shows a cross sectional detailed side view and top view of the nozzle 12 and the suction pipe 5. Here it is shown a lifting device 13 shaped as a hand with fingers is fitted to lift the scallop slightly from the seabed to avoid excessive suction of sand and other seabed sediments. This nozzle is particularly effective if the sea-living organism that is to be collected is e.g. scallops which can be partially or completely submerged in the seabed. The suction pipe 5 may also be shaped as the profile of a scallop in order to reduce the risk of the scallop falling back to the nozzle 12.
Depending on which species is harvested, a custom built nozzle 12, will be used that increases the efficiency of the harvest. For sea urchins a flexible hose will be sufficient as harvesting is mainly performed on a rocky, un-even surface.
For cockles, the nozzle will be significantly wider than for scallops as the operator is not aiming to harvest one particular individual, but all individuals in a specified sector or area. As the cockles are smaller than scallops, the height of the nozzle can be reduced. In order to retrieve the cockles, a number of fingers are used to cut the seabed and to lift them up so that they can be vacuumed into the suction pipe.
Figure 5 shows that depending on which sea-living organism that is the aim of the harvest, a system of variable ballast is fitted. This system consists of two ballast tanks 15 that are normally filled with water. If needed to maintain slightly positive buoyancy, compressed air will be let into the tanks, forcing the water out and hence adding buoyancy. This is a system that is possible to use when harvesting species with specific density above 1.0, particularly scallops and other heavier shells.
Figure 6 shows the device mounted on the end of a remotely operated manipulator arm 17 which is located on a surface vehicle. The surface vehicle is further provided with means for controlling the arm and device. This is done via controls, either mounted on the arm, or connected to the arm either via cable or wireless. The nozzle and suction hose are connected to the arm whilst the suction pump and the filtration device are located on the boat.
The arm is further fitted with a camera to make it possible to see where to control the arm. When operating without the ROV, the storage box is to be removed from the suction chamber when full, inserting a new box and continuing the harvesting.

Claims

Claims
1. A device ( 1 ) for collecting sea-living organisms from the seabed or submerged objects wherein said device (1) consists of suction chamber (6), filtration device (7) and exhaust system (9, 10), at least one camera (16) connected to it and is
5 controlled by a surface vehicle (4) and is further c h a r a c t e r i z e d
b y that:
- said device has a changeable nozzle (12),
- an inclined suction pipe (5) between the nozzle (12) and the suction chamber (7),
I0 - has a changeable filtration and storage box (7),
- uses a thruster (8) to pump out water from the suction chamber (6), and
- said device (1) has at least one horizontal exhaust manifold (10).
2. Device (1) for collecting sea-living organisms as described in claim 1 wherein said device (1) is installed on a Remotely Operated Vehicle (2) controlled by a is surface vehicle (4).
3. Device (1) for collecting sea-living organisms as described in claim 1 wherein said device is (1) installed on the surface vessel, with the suction nozzle and a transport hose installed on the end of a hydraulically operated manipulator arm (17) o
4. Device (1) for collecting sea-living organisms as described in claim 1 uses a nonreturn valve to relieve the suction chamber for air.
5. Device (1) for collecting sea-living organisms as described in claim 1 uses a system of variable buoyancy in addition to the permanent buoyancy in order to maintain neutral buoyancy when harvesting sea-living organisms with high5 specific density.
6. Device for collecting sea-living organisms as described in claim 1 can be fitted with different nozzles (12) and uses a purpose-built nozzle (12) for each type of sea- living organism that is to be collected.
7. Device for collecting sea-living organisms as described in claim 6 wherein a nozzle can have hydraulically operated fingers (13) for lifting said sea-living organisms from either on or within the seabed.
8. Method for collecting sea-living organisms from the seabed or submerged objects where said sea-living organisms are sucked thru a suction pipe (5) and in to a suction chamber (6), and filtrated using a perforated storage box (7) and the suction is obtained when the thruster (8) pumps water out from the suction chamber (6), through the exhaust system (10) and horizontally out from said device (1).
9. Method for collecting sea-living organisms from the seabed or submerged objects as described in claim 8 wherein said device is controlled from a surface vessel (4).
10. Method for collecting sea-living organisms from the seabed or submerged objects as described in claim 8 wherein said device has at least one camera.
PCT/NO2010/000307 2009-08-14 2010-08-16 Device for collecting objects from the seabed WO2011019290A2 (en)

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Application Number Priority Date Filing Date Title
NO20092836A NO333031B1 (en) 2009-08-14 2009-08-14 Apparatus and method for collecting objects from the seabed
NO20092836 2009-08-14

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WO2011019290A3 WO2011019290A3 (en) 2011-06-30

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CN102578057A (en) * 2012-03-05 2012-07-18 福州百特节能科技有限公司 Shellfish product harvester
CN103535329A (en) * 2013-10-28 2014-01-29 莱州海益苗业有限公司 Marine product fishing and catching machine
CN103719048A (en) * 2013-12-13 2014-04-16 谢鑫建 Overwater-control pipe suction type sea cucumber fishing device
CN103918621A (en) * 2014-04-14 2014-07-16 中国船舶重工集团公司第七○二研究所 Pumping type deep-sea organism collector
CN103918622A (en) * 2014-04-18 2014-07-16 青岛罗博飞海洋技术有限公司 Suction type sea cucumber fishing device and method
CN103947620A (en) * 2014-04-29 2014-07-30 深圳深水网箱科技有限公司 Cage culture fishing system and fishing method applying same
CN104813975A (en) * 2015-05-14 2015-08-05 大连赫海科技有限公司 Underwater unmanned operation aquaculture robot
CN105394003A (en) * 2015-12-06 2016-03-16 山东建筑大学 Sea cucumber capturing device
WO2017216512A1 (en) * 2016-06-16 2017-12-21 Atlantic Lionshare Ltd Method and apparatus for controlling fish
CN109018274A (en) * 2018-07-30 2018-12-18 国家深海基地管理中心 Flood dragon manned underwater vehicle type of extension abyssopelagic organism acquirer
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WO2019135070A1 (en) * 2018-01-04 2019-07-11 Pirie & Smith Limited A method or apparatus for collecting marine life
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CN103535329A (en) * 2013-10-28 2014-01-29 莱州海益苗业有限公司 Marine product fishing and catching machine
CN103719048A (en) * 2013-12-13 2014-04-16 谢鑫建 Overwater-control pipe suction type sea cucumber fishing device
CN103918621A (en) * 2014-04-14 2014-07-16 中国船舶重工集团公司第七○二研究所 Pumping type deep-sea organism collector
CN103918622A (en) * 2014-04-18 2014-07-16 青岛罗博飞海洋技术有限公司 Suction type sea cucumber fishing device and method
CN103918622B (en) * 2014-04-18 2015-10-28 青岛罗博飞海洋技术有限公司 Suction-type sea cucumber catching device and catching method
CN103947620A (en) * 2014-04-29 2014-07-30 深圳深水网箱科技有限公司 Cage culture fishing system and fishing method applying same
CN104813975A (en) * 2015-05-14 2015-08-05 大连赫海科技有限公司 Underwater unmanned operation aquaculture robot
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US11547103B2 (en) 2017-10-25 2023-01-10 Tau Tech As Fishing tool for bottom-dwelling marine organisms, for fishing Iceland scallops, other scallops and potentially other bottom species such as sea cucumbers, sea urchins, other types of shellfish and species of crab
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