EP4263956A1 - Systeme de creusage d'une tranchee dans un sol immerge, et procede de creusage associe - Google Patents
Systeme de creusage d'une tranchee dans un sol immerge, et procede de creusage associeInfo
- Publication number
- EP4263956A1 EP4263956A1 EP21848179.4A EP21848179A EP4263956A1 EP 4263956 A1 EP4263956 A1 EP 4263956A1 EP 21848179 A EP21848179 A EP 21848179A EP 4263956 A1 EP4263956 A1 EP 4263956A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- digging
- water
- obtaining
- ground
- submerged
- 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.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/8858—Submerged units
- E02F3/8866—Submerged units self propelled
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9206—Digging devices using blowing effect only, like jets or propellers
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/24—Safety devices, e.g. for preventing overload
- E02F9/245—Safety devices, e.g. for preventing overload for preventing damage to underground objects during excavation, e.g. indicating buried pipes or the like
Definitions
- the present invention relates to the general field of burial, and relates in particular to a system for digging a trench in soil immersed in water, for example sea soil.
- the invention applies in particular, but not exclusively, to the digging of a trench in submerged soil in shallow water, typically a seabed positioned less than fifty meters from the surface of the water (for example around a beach edge).
- the burial of an underwater pipeline is carried out by means of a system comprising in particular a digging device capable of digging trenches in the seabed.
- such a digging device is able to move on the sea floor, while digging the sea floor using pressurized water, so as to dig a trench.
- the digging device is supplied with pressurized water by a pump positioned on the deck of a boat, a supply pipe connecting the digging device to the pump.
- the present invention relates to a system for digging a trench in ground immersed in water, said system comprising a digging device comprising:
- - digging means suitable for being supplied with pressurized water and for digging the submerged soil using the pressurized water
- system further comprising control means configured to control the moving means and supply means configured to supply pressurized water to the digging means, characterized in that the supply means comprise at least one water-jet type turbine, said at least one water-jet type turbine being positioned on flotation means suitable for positioning an inlet of water from said at least one hydro-jet type turbine immersed in water.
- the high power of the hydro-jet type turbine enables the digging device to effectively dig the submerged ground.
- the dimensions of the hydrojet type turbine allow its use in shallow waters.
- the hydrojet-type turbine can thus be positioned close to the digging device, even in shallow waters, which makes it possible to better recover the power of the hydrojet-type turbine.
- the digging system comprises at least one personal watercraft comprising said at least one water-jet type turbine and the flotation means.
- the personal watercraft is a common material, light (approximately 300 kilograms), handy and easily transportable.
- the watercraft allows the water-jet type turbine to be positioned close to the digging device, even in shallow waters, which makes it possible to better recover the power of the hydrojet-type turbine.
- the digging system further comprises detection means capable of detecting a pipeline positioned on the submerged ground, the control means being capable of controlling the displacement means so as to dig the submerged ground below the pipeline.
- the digging system further comprises:
- - second obtaining means capable of obtaining the depth of the water at said position of the digging device, by emission and reception of acoustic waves, the control means being capable of controlling the displacement means as a function of the position obtained and/or the depth obtained.
- control means are positioned on a boat
- the second means of obtaining are positioned at the level of the surface of the water at the position of the digging device, the second means of obtaining being able to transmit the depth obtained to the control means via radio waves.
- the digging device is a slicer robot.
- the digging system comprises first connection means capable of connecting the digging means to the hydrojet-type turbine, taking the form of a pipe whose length is less than thirty meters. [0019] The short length of the pipe makes it possible to limit the power losses between the turbine and the digging means.
- the invention further relates to a method for digging a trench in ground immersed in water, comprising the following steps:
- control means by control means, of means for moving a digging device, so as to move said digging device on the submerged ground
- the supply means comprising at least one waterjet-type turbine, said at least one waterjet-type turbine being positioned on flotation means suitable for positioning a water inlet of said at least one waterjet-type turbine submerged in water.
- the method further comprises the following step:
- the displacement means being controlled so that the digging means dig the submerged ground below the pipeline.
- the method further comprises the following steps:
- control means are positioned on a boat
- the obtaining of the depth is implemented by means of obtaining said second means of obtaining, positioned at the level of the surface of the water at the position of the digging device, the method further comprising transmitting the depth measured by the second obtaining means to the control means via radio waves.
- FIG. 1 Figure 1 schematically shows a digging system according to an exemplary embodiment of the invention
- FIG. 2 schematically represents a turbine of the hydro-jet type of a digging system according to an exemplary embodiment of the invention
- FIG. 3 represents, in the form of a flowchart, the main steps of a digging method according to an exemplary embodiment of the invention
- FIG. 4 Figure 4 schematically shows a digging system according to another exemplary embodiment of the invention.
- Figure 5 schematically shows the digging system of Figure 4.
- FIG. 6 schematically represents a digging device of a digging system according to an exemplary embodiment of the invention.
- the invention relates to a system for digging a trench in ground immersed in water, for example seafloor.
- the invention applies in particular, but not exclusively, to the digging of a trench in submerged soil in shallow water, typically soil sailor positioned less than fifty meters from the surface of the water (for example around a beach edge).
- Figure 1 schematically shows an example embodiment of a digging system 100 according to the invention.
- the digging system 100 comprises a digging device 110.
- This digging device 110 is adapted to be immersed in water E and to be positioned against the submerged ground S.
- FIG. 6 An example of a digging device 110 is shown schematically in Figure 6.
- the digging device 110 comprises moving means 112 capable of moving said digging device 110 on the submerged ground S.
- the displacement means 112 comprise for example one or more wheels, one or more caterpillars, and/or one or more skids.
- the digging device 110 comprises digging means 116 adapted to be supplied with pressurized water and to dig the submerged soil S using this pressurized water.
- the digging means 116 typically comprise one or more nozzles, each nozzle being adapted to concentrate a pressurized water jet, the water jet making it possible to dig the submerged soil S.
- the digging device 110 can also comprise detection means 114 configured to detect a pipe C (for example a cable) positioned on the submerged ground S.
- the detection means 114 comprise a TSS sensor (acronym for “Turbidity, Suspended Solids”, in English terminology).
- the digging device 110 is typically a trencher robot (“trencher”, in English terminology), or a sledge-type robot (“sledge”, in English terminology).
- the digging system 100 further comprises control means 120 configured to control the moving means 112 of the digging device 110.
- the control means 120 may comprise a control station 122, which can be positioned on a boat B.
- the boat B is positioned in deep water, that is to say typically at a distance greater than 50 meters or 100 meters from shore R.
- control means 120 typically comprise a motor 124, the motor being able to be positioned on the shore R (see FIGS. 4 and 5) typically when the digging device 110 is a toboggan-type robot, on the boat B or on the digging device 110 (typically when the digging device 110 is a slicing robot).
- control means 120 can be placed in a control station positioned on the ground, for example on a beach.
- the digging system 100 includes supply means 130 configured to supply the digging means 116 with pressurized water.
- the supply means 130 comprise at least one turbine 140 of the hydrojet type. It will be considered in the remainder of the description that the supply means 130 comprise a turbine 140 of the hydrojet type.
- the supply means 130 may however comprise one or more additional water-jet type turbines 140, the water-jet type turbines 140 of the supply means 130 being coupled by pipe connection means.
- the turbine 140 of the waterjet type typically comprises a pipe 141 in which is positioned a propeller 142 connected to a motor 143 by a transmission shaft 144.
- the pipe 141 comprises a water inlet 145 and leads to a nozzle 146.
- the nozzle 146 comprises a water outlet 147, the diameter of the water outlet 147 being smaller than the diameter of the part of the nozzle 146 connected to the pipe 141 .
- the supply means 130 comprise flotation means 132, on which is positioned the turbine 140 of the hydrojet type.
- the flotation means 132 are adapted to position and maintain the water inlet 145 of the turbine 140 submerged in water.
- the water inlet 145 is typically positioned at a distance from the surface of water of at least about 20 cm. It is thus possible to position the turbine 140 close to the digging device, even in shallow water, the minimum depth of water necessary for the operation of the turbine being approximately 20 cm. Of course, depending on the turbine used, the minimum water depth may be different.
- the digging system 100 includes a personal watercraft 150, also called a sea scooter or known as a "Jet Ski” (registered trademark).
- the personal watercraft 150 then comprises the power supply means 130 and therefore the water-jet type turbine 140 and the flotation means 132, the hull of the personal watercraft 150 forming the flotation means 132.
- the digging system 100 may further comprise first connection means 160 capable of connecting the digging means 116 of the digging device 110 to the turbine 140 of the hydrojet type.
- the first connection means 160 can take the form of a pipe, which is for example a flexible pipe. A first end of the pipe 160 is connected to the water outlet 147 of the turbine 140 and a second end is connected to a water inlet of the digging means 116.
- the length of the pipe is typically less than thirty meters, and is for example 20 meters. This short length of pipe makes it possible to limit the power losses between the turbine 140 and the digging means 116.
- the digging system 110 can also comprise second connection means 170 able to electrically connect the control means 120 to the digging device 110.
- the second connection means 170 typically take the form of a cable comprising one or more electric wires and/or optical fibers, called "umbilical cord”.
- the digging system may comprise first obtaining means 180, capable of obtaining the position of the digging device 110 and/or second obtaining means 190 capable of obtaining the depth of the water at the position of the digging device 110.
- the first obtaining means 180 are typically fixed to the digging device 110 and are for example a camera.
- the second obtaining means 190 are for example an acoustic wave transmitter-receiver, adapted to be positioned on the surface of the water above the digging device 110.
- the first obtaining means 180 and/or the second obtaining means 190 are configured to respectively transmit the position obtained and/or the depth obtained to the control means 120, the control means 120 then being capable of knowing advancement of the digging device 110.
- the control means 120 are configured to control the means of displacement 112 of the digging device 110 according to the position and/or the depth obtained, as well as according to the position of the pipe detected.
- the commands transmitted to the displacement means 112 are determined from this information, in particular because the response of the digging device 110 to the commands is different when the latter is completely submerged and when it begins to come out of the water by climbing on the shore.
- the first obtaining means 180 are typically configured to transmit the position obtained to the control means 120 via a wired connection, for example via an optical fiber from the second connection means 170.
- the second obtaining means 190 are typically configured to transmit the depth obtained to the control means 120 by radio waves.
- FIG. 3 represents a method for digging a trench in a ground S immersed in water, such as a sea floor. This method is implemented by a digging system in accordance with an exemplary embodiment of the invention, such as the digging system 100 of FIG.
- the digging process is typically implemented after the implementation of a process for laying a pipeline C on the submerged ground S, the pipeline C being adapted to be buried in the ground S ("underground” ).
- the digging device 110 is immersed in the water E in order to be positioned against the submerged ground S.
- the detection means 114 of the digging device 110 detect the pipe C having previously been deposited on the ground S.
- the detection means 114 can then transmit one or more positioning data of the pipe C to the control means 120, typically via the second connection means 170.
- the first obtaining means 180 obtain the position PO of the digging device 110.
- the position PO obtained is then typically transmitted to the control means 120 via the second connection means 170, by example via an optical fiber of the second connection means 170.
- the second obtaining means 190 obtain the depth PR of the water E at the position PO of the digging device 110, typically the position PO obtained in step E320.
- Obtaining the depth PR is for example carried out by a transceiver 190 of acoustic waves, positioned at the surface of the water E above the digging device 110.
- the transceiver 190 transmits an acoustic wave then receives the acoustic wave reflected by the ground S, the time elapsed between the emission of the acoustic wave and the reception of the reflected acoustic wave making it possible to calculate the depth PR of the water E.
- the depth PR obtained is then transmitted to the control means 120, typically via radio waves.
- control means 120 control the means of movement 112 of the digging device 110, so as to move the digging device 110 on the ground S, typically as a function of the positioning data or data of the cable or pipe transmitted to step E310, the position of the digging device 110 transmitted to step E320 and/or the depth of the water transmitted to step E330.
- the moving means 112 then move the digging device 110, typically along the detected pipe.
- the supply means 130 supply pressurized water to the digging means 116 of the digging device 110.
- the ground S is then dug by the digging means 116 using pressurized water.
- the motor 143 of the turbine 140 of the hydrojet type is started and then drives the propeller 142 in rotation via the transmission shaft 144.
- the rotation of the propeller makes it possible to suck up the water. E via the water inlet 145 and to propel it towards the nozzle 146.
- the configuration of the nozzle 146 i.e. the diameter of the water outlet 147 smaller than the diameter of the part of the nozzle 146 connected to the pipe 141) makes it possible to accelerate the speed of the water E flowing in the nozzle 146 (application of Bernoulli's theorem).
- the water E then exits through the water outlet 147 and circulates in the first connection means 160 to arrive at the water inlet of the digging means 116, the digging means using this water E to dig the ground S.
- the power of the turbine 140 is typically 310 hp (horsepower) or approximately 228 kW, a power of 620 hp (and therefore approximately 456 kW) being obtainable in the event of coupling of two turbines 140.
- the depth of digging is typically two meters from the ground surface S.
- the displacement of the digging device 110 concomitant with the digging of the soil S allows the digging of a trench, typically along the pipe C detected and below the pipe C detected, the soil S also being able to be dug around Pipe C so that Pipe C can descend into the trench without rubbing the sides of the trench.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Earth Drilling (AREA)
- Electric Cable Installation (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2013652A FR3118076A1 (fr) | 2020-12-18 | 2020-12-18 | Système de creusage d’une tranchée dans un sol immergé, et procédé de creusage associé |
| PCT/FR2021/052349 WO2022129792A1 (fr) | 2020-12-18 | 2021-12-15 | Systeme de creusage d'une tranchee dans un sol immerge, et procede de creusage associe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4263956A1 true EP4263956A1 (fr) | 2023-10-25 |
Family
ID=74554124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21848179.4A Pending EP4263956A1 (fr) | 2020-12-18 | 2021-12-15 | Systeme de creusage d'une tranchee dans un sol immerge, et procede de creusage associe |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240052592A1 (fr) |
| EP (1) | EP4263956A1 (fr) |
| FR (1) | FR3118076A1 (fr) |
| WO (1) | WO2022129792A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2278854A1 (fr) * | 1974-07-19 | 1976-02-13 | Comex | Engin automoteur pour travailler au fond de l'eau |
| EP0185422B1 (fr) * | 1984-12-19 | 1990-02-07 | Soil Machine Dynamics Limited | Procédé et dispositif pour creuser dans le sol |
| US4992000A (en) * | 1989-06-19 | 1991-02-12 | Central States Underwater Contracting, Inc. | Underwater trenching system |
| US6022173A (en) * | 1994-01-13 | 2000-02-08 | Saxon; Saint E. | Underwater trenching system |
| FR3030587A1 (fr) * | 2014-12-18 | 2016-06-24 | Environnemental Sediments Treat | Systeme de prelevement de sediments sur un fond d'un milieu liquide |
| CN108019564B (zh) * | 2017-12-02 | 2019-07-02 | 东北石油大学 | 水力喷射式海底挖沟铺管机器人 |
| CN108915010B (zh) * | 2018-07-05 | 2020-12-04 | 浙江路之友工程机械有限公司 | 爬行式吸泥设备 |
-
2020
- 2020-12-18 FR FR2013652A patent/FR3118076A1/fr not_active Ceased
-
2021
- 2021-12-15 EP EP21848179.4A patent/EP4263956A1/fr active Pending
- 2021-12-15 US US18/258,092 patent/US20240052592A1/en active Pending
- 2021-12-15 WO PCT/FR2021/052349 patent/WO2022129792A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022129792A1 (fr) | 2022-06-23 |
| FR3118076A1 (fr) | 2022-06-24 |
| US20240052592A1 (en) | 2024-02-15 |
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