WO2016113331A1 - Dispositif et procede de protection des objets sous-marins remorques contre les lignes de peche - Google Patents
Dispositif et procede de protection des objets sous-marins remorques contre les lignes de peche Download PDFInfo
- Publication number
- WO2016113331A1 WO2016113331A1 PCT/EP2016/050626 EP2016050626W WO2016113331A1 WO 2016113331 A1 WO2016113331 A1 WO 2016113331A1 EP 2016050626 W EP2016050626 W EP 2016050626W WO 2016113331 A1 WO2016113331 A1 WO 2016113331A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cable
- protective device
- blade
- shape
- towed
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/56—Towing or pushing equipment
- B63B21/66—Equipment specially adapted for towing underwater objects or vessels, e.g. fairings for tow-cables
-
- 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
- B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
- B63G8/42—Towed underwater vessels
Definitions
- the invention relates generally to devices for protecting submarine objects, and in particular devices for protecting underwater objects towed by a tractor-surface building against fishing lines that may come to meet such objects.
- a towed linear acoustic antenna (also called “flute antenna”) is in the form of a pipe having a very large length (up to a few hundred meters) compared to its small diameter. Such an antenna is towed by a towing cable several hundred meters and is intended to be immersed to deep enough depths in the sea. Linear antennas are for example used to perform for example anti-subtropment control. marine or oil exploration. Generally a towed body (or fish), is attached to the end of the towing cable and is thus towed together with the antenna.
- a fishing line cutting device mounted cable tail, has been proposed in patent FR 2 803 267 to cut the fishing lines coming into the device before they reach a submarine object. towed by the cable.
- a device comprises an elongated blade holder provided with a retractable blade in a slot formed longitudinally and vertically in this blade holder, by rotating about a transverse spring axis located at the rear of this blade holder. It also comprises an elongated U-shaped piece with a rectilinear upper branch and a lower branch ending with a spout deviating from the axis of this part, these two branches delimiting an interior space in which the door is placed. blade to be attached to the upper arm.
- Such a device can be integrated only at the anchor at the tail of the towing cable to cut the fishing lines that engage in the device, the cut lines then drifting into the sea without coming entangled with the towed object.
- This device can not be used for other configurations of towed systems. Moreover, this device can not be used directly on a towed linear antenna alone. It also has a footprint such that it can not be used directly on a towed object to be reassembled on the surface building passing through a specific fairlead, in the manner of a cable car, before becoming accessible inside the ship. If fishing lines are caught, the fishing lines can either compromise the recovery of the towed object or cause an over-accident (blockage or aggravated damage in the fairlead).
- the invention improves the situation.
- a protection device configured to protect a line cutter device mounted on a towed cable by a surface building, the device comprising a blade holder comprising a blade.
- the blade is formed in the blade holder and is retractable into a slot around a transverse spring axis.
- the protective device comprises a weighted body of generally hydrodynamic shape defining a transverse opening for the passage of the cable and an interior cavity in which the blade is arranged so as to cut any line engaged in the cavity, the protective device being free rotation around the cable.
- the protective device may comprise a transverse tube delimiting the transverse opening, the tube being arranged to pivot freely around the towing cable.
- the internal cavity may delimit an upper part and a lower part, the weighed body being configured to bring the lower part under the cable, under the effect of the hydrodynamic and / or hydrostatic forces exerted on the protection device.
- the body shape may have a hydrodynamic shape configured to maintain the position of the interior cavity under the cable.
- the shape of the body may have a hydrodynamic shape configured to allow the passage of the device on a fairlead.
- the hydrodynamic shape can be further configured so that the device comes to lie on a fairlead, substantially flat and on at least one side, when wound on a winding support.
- the protective device may be covered with elastic material over a selected thickness of the device.
- the lower portion may comprise a beak-down extension.
- the lower part may comprise weight and the upper part of the buoyancy.
- the axis of the blade can cut the median axis of the cavity of the inner cavity towards the bottom while the blade passes through the lower part via a slot.
- the protection device may have a generally ellipsoidal shape.
- the protective device may have a general shape of whistled wing.
- the protective device may further comprise an anchor ring for locking the translational protection device along the towing cable, while leaving it free to pivot around the cable.
- the protection device may in particular be arranged at the cable end.
- the protection device thus makes it possible to adapt the cut-line device to any configuration of the object or the towed system, including a linear antenna towed and towed by itself.
- Another advantage of the protection device according to the invention is that it allows to reassemble the protection assembly of the cut-line device in assembled mode through a fairlead or a winch, without the need to disassemble to pass in the fairleads or the store on the winch drum.
- FIG. 1 represents an example of an environment in which certain embodiments of the invention may be implemented
- FIG. 2 is a diagrammatic representation, seen from the side of the protection device mounted on an electro-tractor cable, according to a first embodiment of the invention
- FIG. 3 is a front view of the protection device, according to the first embodiment of the invention.
- FIG. 4 shows the water flow lines and the weight / buoyancy zones as seen from the side on the immersion protection device, according to the first embodiment
- FIG. 5 is a view of the protection assembly showing the water flow lines viewed from the front and the weight / buoyancy zones;
- FIG. 6 is a schematic view showing the different states of a fishing line engaging in the protective device
- FIG. 7 is a diagram illustrating the respective placement of the cable, the protection device and the antenna, when these elements are reassembled through a heater on the surface building in assembled form, according to the first embodiment. of the invention.
- FIG. 8 is a diagrammatic representation of the protection device mounted on an electro-tractor cable, viewed from the side according to a second embodiment of the invention, with the water flow lines and the weight / weight zones. buoyancy;
- FIG. 9 is a front view according to a second embodiment of the invention, with the water flow lines and the weight / buoyancy zones;
- FIG. 10 is a perspective view showing an exemplary form of the protection assembly, according to the second embodiment.
- Figure 1 1 illustrates the respective placement of the cable, the protection device and the antenna when these elements are raised through a fairlead, on the surface building in assembled form, according to the embodiments of Figures 8 to 10 .
- the drawings and appendices to the description may not only serve to better understand the description, but also contribute to the definition of the invention, if any.
- FIG. 1 represents an example of an environment in which certain embodiments of the invention may be implemented.
- Naval vessels (surface vessels or submarines) 2 are generally equipped with objects towed by a towing cable 3 (for example of the electrotractor type) and intended to be immersed in water, such as for example a towed linear antenna. 1 incorporating acoustic transducers for transmitting and / or receiving acoustic signals in the seabed, with a towed body 4 as shown in part A of figure 1 or without towed body as shown in part B of figure 1.
- a linear antenna 1 towed by a building surface 2 as a non-limiting example.
- a protection assembly 10 is arranged on the cable to protect the object towed by the traction cable 3 against the fishing lines, as shown in the enlarged view C.
- Figure 2 shows a protective assembly 10 of a towed object 1 against damage caused by fishing lines, according to a first embodiment.
- the assembly 10 is preferably fixed at the end 5 of the cable 3 which is connected to the surface building 2.
- the protection device has a body of generally ellipsoidal shape (by ovoid example).
- the protection assembly 10 comprises a protection device 100 for protecting a line-cutting device 1 10, the line-cutting device comprising a cutting blade 1 1 1 partially retractable in a slot 1 14 and arranged in such a way as to cut the lines who engage in the protection package. The lines thus released then drift into the sea without risk of getting entangled in the towed object 1.
- the cut-line device 1 10 can be fixed beforehand on a section of the cable 3, for example by means of the protection device 100.
- One end of the blade 1 1 1 can be fixed rigidly at a first point P1 of the line cutter device 1 10 while the other end is fixed by a pin 1 13 provided with a spring at a second point P2 the line cutter device 1 10 so that the blade can rotate around the point P2 in the counterclockwise direction when a fishing wire engaged in the protective device is pressed on the blade.
- the blade 1 1 1 may be chosen from a stainless material for better resistance to the marine environment.
- the blade 1 1 1 can be fixed vertically in a blade holder provided in the line cutter device 1 10 and provided with a longitudinal and vertical slot 1 14.
- the blade can be fixed to the front end of the door -lame 1 12 at point P1 by a screw 1 1 6 and be maintained at the end P2 of the blade holder 1 12 by an axis 1 13 provided with a spring so as to pivot about the axis 1 13 to come remove the slot 1 14.
- the end of the blade 1 1 1 can be cut in the shape of a bevel.
- the line cutter device 1 10 may for example be a device of the type described in the patent FR 2 803 267, as shown in FIG. 2.
- the device of FIG. stroke-line 1 10 may be secured to a fixing bracket whose axis is perpendicular to the plane of the blade
- the protective device 100 is in the form of a profiled body and weighed hydrodynamically, and comprises a first axial opening 50 configured to form a passage for the cable 3 on which is mounted the line cutter 1 10.
- body weighed means a generally neutral buoyant body (buoyancy close to that of water).
- the protective device delimits an opening 51 (hereinafter referred to as a "throat" or internal cavity) facing the upstream end of the tractive cable 3 in operational mode and intended to direct the fishing lines which engage in it towards the blade 1 1 1.
- the drain 51 is arranged on only a part of the length of the protection device 100 so that the bottom of the drain is closed.
- the drain 51 is furthermore configured so that the axis D 1, defining the median axis corresponding to the general direction of the drain 51, intersects the axis D 2 corresponding to the general direction of the end of the blade 1 1 1 at a point A located towards the bottom of the drain 51.
- the protective device 100 defines on either side of the drain 51 an upper portion 52 through which the cable 3 and a lower portion 53 forming a jaw.
- the jaw 53 may have a beak-down shape on the front when the protective device is in a stable position so that even in the air under the action of gravitational forces, the jaw 53 does not come into contact with the jaws. hang on the thick lip of the fairlead 9.
- the height of the drain 51, along the perpendicular to the axis D1, is preferably of small size, for example of the order of a few centimeters.
- the protection device 100 is configured to be free to rotate about the axis D 0 of the cable section which passes therethrough while being capable of self-orienting so as to position the jaw 53 towards the bottom of the water and the upper part 52 towards the surface of the water, in a stable position.
- the jaw 53 is positioned on the underside of the cable 3 in a stable position.
- the protection device is particularly suitable for "simple" towed linear antennas (that is to say in the absence of towed body on which to rely to maintain a correct orientation).
- the protection device 100 is able to orient freely both under the effect of the hydrodynamic and hydrostatic forces exerted on the protection device 100 .
- the protective device 100 has a generally ovoid shape, of substantially circular cross section.
- the protective device 100 can integrate a tube 30 of low friction material, at the opening 50, allowing it to pivot freely around the electrotractor cable 3.
- the protection device 100 may further comprise an anchored ring 7 , for example in the vicinity of the termination 5 of the cable 3, to let the free device to orient around the axis D0 while maintaining the protection device at a chosen point of the cable (cable end 5 in particular).
- the locking of the protection device at this position on the cable is particularly useful when passing through fairleads during launching.
- the protective device 100 may for example consist of two parts 52 and 53 assembled, as shown in the example of Figure 3 corresponding to the embodiment where the protection device 100 has a generally ovoid shape. All of the two parts 52 and 53 have general shapes of half shell having conjugated mechanical connection means for connecting to each other, such as interlocking connection means and / or screw.
- the protection device 100 can remain in position on the electro-tractor cable 3. It can only be disassembled during maintenance operations on the line cutter device 1 10 as for the replacement of the blade 1 1 1.
- the self-steering capacity of the protection assembly 10 is ensured both by a weight, provided in particular in the lower part 53 (jaw) of the protection device 100, and by the buoyancy of the upper part 52.
- the lower part may comprise a ballast of high density (greater than the density of water) and the upper part may comprise a body of low density (lower than that of water).
- the lower portion 53 and the upper portion 52 thus exert a static rectification torque.
- the assembly makes it possible to further improve the stability conferred by its hydrodynamic shapes.
- the jaw 53 is thus weighted, which makes it possible to hold the drain 51 and the cut-line device 1 10 under the cable 3 in the water.
- the trailing edge of the body 10 and the hydrodynamic forces also stabilize the jaw 53 in this position.
- the device 10 makes it possible to reinforce a stable position in the stream of water thanks to the upper part 52 which has a stable drag center above the electro-tractor cable 3.
- the jaw shape of the front of the protection device 100 also makes it possible to maintain a fishing line which would begin to come into contact with the protection device 100 correctly oriented under the effect of the drag of the fishing line and therefore engage correctly in the drain 51 to come into contact with the blade to be cut by it.
- Figures 4 and 5 show schematically the flow lines 40 on the two parts 52 and 53 of the protection device 1 00 when it is immersed in water to illustrate the effect of hydrodynamic forces.
- the lower part 53 (jaw) has in particular a chosen volume sufficiently small compared to the volume of the upper part 52 so that the hydrodynamic drag forces support the orientation of the drain 51 under the cable 3 in a stable position, even when the cable section 3 is almost horizontal.
- the device is similar in shape to the head of a sperm whale, with a bulky upper portion and a lower / longer tapered lower jaw of smaller thickness.
- the protective device 100 may in particular be covered with an elastic material over a certain thickness (such as PU for example), in order to better integrate during its storage on the drum of the handling winch, between cable and antenna. .
- FIG. 6 shows the progression of a fishing line 60 coming into the protection assembly 100.
- the object 1 is towed by the surface vessel into a sea frequented by fishermen using fishing lines, these fishing lines frequently come into collision with the electro-tractor cable 3.
- the lines slide along the cable 3 in the direction of the termination 5 and are then fed to the drain 51 located at the end of the cable 5 3.
- the drain 51 by the path that it draws, then directs the lines to the line cutter 1 10 which cuts the lines with the blade 1 1 1 when the lines come into contact therewith.
- the cut lines are then released and drift into the sea without damaging the system or the towed object (eg linear acoustic antenna 1).
- the protection assembly 10 can be assembled on the towing cable 3 before a first immersion of the object in the water and can remain there.
- the linear antenna 1 can be initially wound on a drum and unrolled for launching the antenna in the water through a fairlead 9 Since the protection device 100 is free to turn around the cable 3, in the embodiments where the jaw 51 is narrow, the protection device may have a tendency to lie on its side when passing through the fairlead 9 or to be wound on the drum.
- the upper body 52 being larger than the jaw 53 so that the fairlead first meets the upper body 52 rather than the jaw 53, in the air, for passage in the fairlead 9.
- FIG. 7 is a diagram illustrating the respective placement of the cable 3, of the protection assembly 10 including the line cutting device 1 10 and of a towed object 1 of the antenna type on a fairlead 9, when these elements are wound on the surface building in assembled form.
- the protection assembly 10 can be assembled to the cable 3 before the launching of the antenna 1 and can then remain there.
- the shape of the protective device 100, without major asperity, is adapted to pass through the fairlead of a winch.
- the linear antenna 1 can be wound on a drum by a winch system by passing through the fairlead 9 in the opposite direction to the setting to water, without the need to remove the protective assembly 10 beforehand.
- the device 10 makes it possible to rid all the fishing lines in tow and therefore also before the recovery of the towed object 1 and its passage in the fairlead.
- the anchoring ring 7 keeps the device 10 in feet of cable through the fairlead 9 during launching.
- the protection assembly 10 can thus remain in place on the electro-tractor cable 3 and is compatible with the operations of passage on a fairlead 9 and / or winding / unwinding on a drum. Indeed, its length may be relatively short, its shape is adapted to such a winding and it may be made of non-aggressive materials for the antenna (elastomeric material) which is wound above the cable 3 and below of the antenna 1.
- Figure 8 is a schematic side view of the protective device mounted on an electro-tractor cable 3, according to a second embodiment of the invention.
- the protective device 100 has a general shape of flexible wing or fairing free to rotate around the cable 3 and includes a leading edge which integrates the jaw 53 and the drain 51 in which is housed the device cut line 1 10.
- the material of the protection device can be chosen relatively flexible / elastic (eg rubber or synthetic such as PU / PE / PVC / ).
- Fig. 9 is a front view of the protection assembly showing the weight / buoyancy zones as well as hydrodynamic flow flow lines according to the second embodiment.
- This wing shape can help better hydrodynamic towing control and easier fairway crossing. However, it must be made of flexible material / elastic not to interfere with the winding on the winch.
- Figure 10 shows the general shape of the protection device 100 according to the second embodiment.
- the protection device 10 has a wing shape with a trailing edge cut in a whistle configured to bring the device 100 to bed to pass on the fairlead 9.
- Figure 1 1 shows the passage on the fairlead 9 thanks to the capacity
- This protective device can be configured to store itself flat on the drum.
- the invention thus provides an effective protection solution against fishing lines regardless of the towed system, such as a linear antenna towed without towed body.
- the invention dispenses with the need to use a hook equipped with a shear to clear the fishing lines outside the ship, before the fairlead from the rear shelf which remains an exposed place.
- the invention is not limited to the embodiments described above by way of non-limiting example. It encompasses all the embodiments that may be envisaged by those skilled in the art.
- the invention is not limited to the type of line cutter shown in FIG. 2 or to the shapes of the device 100 illustrated in FIGS. 2 and 8.
- the protection device 100 may have an ellipsoidal shape similar to that of Figure 2 but provided with a flexible flexible material crest flexible not to tear through the fairleads.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2973907A CA2973907A1 (fr) | 2015-01-16 | 2016-01-14 | Dispositif et procede de protection des objets sous-marins remorques contre les lignes de peche |
US15/543,214 US9981718B2 (en) | 2015-01-16 | 2016-01-14 | Device and method for protecting towed underwater objects from fishing lines |
EP16700600.6A EP3245123B1 (fr) | 2015-01-16 | 2016-01-14 | Dispositif de protection des objets sous-marins remorques contre les lignes de peche |
SG11201705815QA SG11201705815QA (en) | 2015-01-16 | 2016-01-14 | Device and method for protecting towed underwater objects from fishing lines |
AU2016208062A AU2016208062B2 (en) | 2015-01-16 | 2016-01-14 | Device and method for protecting towed underwater objects from fishing lines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1500092 | 2015-01-16 | ||
FR1500092A FR3031724B1 (fr) | 2015-01-16 | 2015-01-16 | Dispositif et procede de protection des objets sous-marins remorques contre les lignes de peche |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016113331A1 true WO2016113331A1 (fr) | 2016-07-21 |
Family
ID=53483869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2016/050626 WO2016113331A1 (fr) | 2015-01-16 | 2016-01-14 | Dispositif et procede de protection des objets sous-marins remorques contre les lignes de peche |
Country Status (7)
Country | Link |
---|---|
US (1) | US9981718B2 (fr) |
EP (1) | EP3245123B1 (fr) |
AU (1) | AU2016208062B2 (fr) |
CA (1) | CA2973907A1 (fr) |
FR (1) | FR3031724B1 (fr) |
SG (1) | SG11201705815QA (fr) |
WO (1) | WO2016113331A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3031724B1 (fr) * | 2015-01-16 | 2018-03-30 | Thales | Dispositif et procede de protection des objets sous-marins remorques contre les lignes de peche |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1358359A (en) * | 1917-09-18 | 1920-11-09 | Burney Charles Denniston | Cutter for use on towed bodies |
US5042413A (en) * | 1990-03-29 | 1991-08-27 | Leon Benoit | Device for severing underwater mooring lines and cables |
FR2803267A1 (fr) | 2000-01-05 | 2001-07-06 | Thomson Marconi Sonar Sas | Dispositif pour proteger les objets sous-marins remorques contre les lignes de peche |
WO2014173979A1 (fr) * | 2013-04-25 | 2014-10-30 | Cgg Services Sa | Dispositif de coupe destiné à un système de relevé marin et procédé correspondant |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4222340A (en) * | 1978-11-01 | 1980-09-16 | Syntron, Inc. | Cable depth control apparatus |
US4718871A (en) * | 1986-03-24 | 1988-01-12 | Eli Mendelevitch | Aquatic growth cutter |
US5241920A (en) * | 1992-05-11 | 1993-09-07 | Richardson Lee E | Hook assembly for broken tow line retrieval and emergency marine towing |
GB9821277D0 (en) * | 1998-10-01 | 1998-11-25 | Geco As | Seismic data acquisition equipment control system |
US7450467B2 (en) * | 2005-04-08 | 2008-11-11 | Westerngeco L.L.C. | Apparatus and methods for seismic streamer positioning |
US7631608B1 (en) * | 2006-08-25 | 2009-12-15 | The United States Of America As Represented By The Secretary Of The Navy | Underwater cable cutter apparatus |
US8792297B2 (en) * | 2010-07-02 | 2014-07-29 | Pgs Geophysical As | Methods for gathering marine geophysical data |
FR3031724B1 (fr) * | 2015-01-16 | 2018-03-30 | Thales | Dispositif et procede de protection des objets sous-marins remorques contre les lignes de peche |
-
2015
- 2015-01-16 FR FR1500092A patent/FR3031724B1/fr not_active Expired - Fee Related
-
2016
- 2016-01-14 AU AU2016208062A patent/AU2016208062B2/en active Active
- 2016-01-14 EP EP16700600.6A patent/EP3245123B1/fr active Active
- 2016-01-14 WO PCT/EP2016/050626 patent/WO2016113331A1/fr active Application Filing
- 2016-01-14 US US15/543,214 patent/US9981718B2/en not_active Expired - Fee Related
- 2016-01-14 SG SG11201705815QA patent/SG11201705815QA/en unknown
- 2016-01-14 CA CA2973907A patent/CA2973907A1/fr not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1358359A (en) * | 1917-09-18 | 1920-11-09 | Burney Charles Denniston | Cutter for use on towed bodies |
US5042413A (en) * | 1990-03-29 | 1991-08-27 | Leon Benoit | Device for severing underwater mooring lines and cables |
FR2803267A1 (fr) | 2000-01-05 | 2001-07-06 | Thomson Marconi Sonar Sas | Dispositif pour proteger les objets sous-marins remorques contre les lignes de peche |
WO2014173979A1 (fr) * | 2013-04-25 | 2014-10-30 | Cgg Services Sa | Dispositif de coupe destiné à un système de relevé marin et procédé correspondant |
Also Published As
Publication number | Publication date |
---|---|
EP3245123B1 (fr) | 2019-03-06 |
FR3031724A1 (fr) | 2016-07-22 |
FR3031724B1 (fr) | 2018-03-30 |
AU2016208062A1 (en) | 2017-08-10 |
CA2973907A1 (fr) | 2016-07-21 |
US9981718B2 (en) | 2018-05-29 |
AU2016208062B2 (en) | 2020-03-19 |
US20180001971A1 (en) | 2018-01-04 |
EP3245123A1 (fr) | 2017-11-22 |
SG11201705815QA (en) | 2017-08-30 |
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