EP1600602B1 - Dispositif et procédé pour le forage hydraulique - Google Patents

Dispositif et procédé pour le forage hydraulique Download PDF

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Publication number
EP1600602B1
EP1600602B1 EP05010058A EP05010058A EP1600602B1 EP 1600602 B1 EP1600602 B1 EP 1600602B1 EP 05010058 A EP05010058 A EP 05010058A EP 05010058 A EP05010058 A EP 05010058A EP 1600602 B1 EP1600602 B1 EP 1600602B1
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EP
European Patent Office
Prior art keywords
liquid
swing arm
soil
cutting
jet
Prior art date
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Active
Application number
EP05010058A
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German (de)
English (en)
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EP1600602A3 (fr
EP1600602A2 (fr
Inventor
Dominik Hartmann
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Bauer Spezialtiefbau GmbH
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Bauer Spezialtiefbau GmbH
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Publication of EP1600602A2 publication Critical patent/EP1600602A2/fr
Publication of EP1600602A3 publication Critical patent/EP1600602A3/fr
Application granted granted Critical
Publication of EP1600602B1 publication Critical patent/EP1600602B1/fr
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/29—Obtaining a slurry of minerals, e.g. by using nozzles
    • E21B43/292—Obtaining a slurry of minerals, e.g. by using nozzles using steerable or laterally extendable nozzles
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets

Definitions

  • the invention relates to an apparatus and a method for processing the soil.
  • a drill head has a surrounding duct, at the end there are radially outwardly hinged pivot arms, which rest in the rest position in recesses of the drill head. If a drilling fluid is introduced under high pressure into the duct, the arms are folded out.
  • DE 2 035 934 discloses a hydraulic-pneumatic method for removing a solid wall in liquids. In order to reduce the density, gas is injected into the surrounding liquid at the point of decomposition.
  • the object of the invention is to provide a device and a method with which soil material of certain soil layers can be processed efficiently.
  • At least one pivoting arm is arranged with a jet pipe at a bottom end of the tubular body, which is movable from a rest position on the tubular body in a Ausstellposition in which the pivot arm projects laterally on the tubular body, and that for generating a liquid cutting jet, the jet pipe opens substantially straight into a jet nozzle.
  • soil material can be purposefully released and processed in a defined soil layer within the soil by means of a cutting jet.
  • a cutting jet can not only be pivoted but also, for example telescopically extendable.
  • a basic idea of the invention lies in the arrangement of a substantially straight, long jet pipe, which opens straight into the jet nozzle. In contrast to nozzles introduced transversely into a pipe, a jet pipe with a length of at least 10 cm results in an exact, highly effective cutting jet.
  • the swivel arm which is suitably arranged in a lower, bottom-side region of the tubular body, can be brought into a rest position on the tubular body supporting it.
  • the swivel arm may, for example, lie flat against the green body, be received in a receiving recess provided on the outside of the tubular body, or be arranged inside the tubular body.
  • the swing arm in the rest position with the tubular body forms a continuous surface.
  • the longitudinal axis of the pivot arm may be arranged approximately parallel to the longitudinal axis of the tubular body.
  • the swivel arm As long as the swivel arm is in the rest position, it may be advantageous to block a fluid passage through the swivel arm. However, it may be useful to provide a fluid passageway thereby also in the rest position of the swaying arm, whereby a generated liquid jet may then assist, for example, a propulsion of the tubular body into the ground.
  • the pivot arm From the rest position on the tubular body of the swivel arm according to the invention is pivotable in a Ausstellposition in which it protrudes laterally from the tubular body.
  • the longitudinal axis of the pivot arm with the longitudinal axis of the tubular body in the deployed position ⁇ include a deployment angle, which is suitably 45 ° to 120 °, in particular about 90 °.
  • the pivot arm can be released for a fluid passage and thereby at least approximately radially directed to the tubular body liquid jet can be generated.
  • the swivel arm of the liquid jet occurs only at a certain radial distance from the tubular body, which is why a particularly high range of the liquid jet is achieved in the soil and thus a particularly large mining area can be edited.
  • the Ausstellposition can also be provided at least one intermediate position of the pivot arm, in which the fluid passage can be released or locked.
  • the at least one swivel arm nozzle for generating the liquid jet is arranged on the front side of the swivel arm such that the generated liquid jet is directed at least approximately in the longitudinal direction of the swivel arm, ie parallel to its longitudinal axis.
  • the front side protrudes from the arm, which are at the exit of the Fluid from the swing arm occurring reaction forces also directed mainly in the longitudinal direction of the swing arm and thus can be particularly well received by this.
  • substantially no reaction forces occur in the pivoting direction of the pivoting arm, whereby a pivoting drive of the pivoting arm is relieved.
  • the design of the swivel arm for an approximately longitudinal liquid jet thus allows the use of particularly high liquid pressures for liquid jet generation, thus a particularly high beam range and a particularly large mining area.
  • the swivel drive can basically be arranged on the bottom side of the tubular body, in particular near the swivel arm, as well as on the top side of the tubular body, ie near its end remote from the bottom end.
  • the pivoting drive can have, for example, at least one hydraulic cylinder and / or at least one pneumatic cylinder, which in particular can be articulated directly on the pivoting arm.
  • the pivot drive may comprise at least one drive rod which extends parallel to the longitudinal axis of the tubular body upwards.
  • the pivoting drive may in particular comprise axially displaceable, suitably concentrically arranged tubes, of which in particular one of the tubular bodies may be.
  • the pivot drive can also have a rotary gear, a rotary motor and / or a rack with pinion.
  • the pivot drive is controllable from above. If a hydraulic rotary actuator is provided, hydraulic lines can be provided which run upwards in the tubular body. In a pneumatic rotary actuator can be provided according to pneumatic lines in the tubular body.
  • the jet pipe is advantageously straight, i. designed with straight longitudinal axis.
  • the jet pipe is designed in particular with an approximately circular outer cross section.
  • a plurality of pivot arms may be provided with jet tubes.
  • the different pivot arms may preferably have different lengths, so that the respective Schwenkarmdüsen in Ausstellposition have different radial distances from the tubular body.
  • the at least one swivel arm has a length of about 50 cm to 4 m, in particular a length of about 2 m, wherein a large part of the length is formed by the jet pipe.
  • At least one pre-cutting device for producing a further pre-cutting liquid jet is provided on the tubular body, in particular above the swivel arm.
  • This pre-cutting device can be arranged offset by, for example, 180 ° to the swivel arm.
  • soil material in particular can be loosened and / or loosened in a pre-cutting area.
  • the pre-cutting area is dimensioned such that the swivel arm can be accommodated therein in its deployed position.
  • the appropriately arranged outside of the tubular body Vorschneide beautiful may have a Vorschneidüse, which may be arranged in particular directly on the outer wall of the tubular body.
  • the pre-cutting nozzle can also be arranged on a Vorschneiderohr, which protrudes radially from the tubular body.
  • the pre-cutting tube a shorter length than the swivel arm.
  • the pre-cutting device is designed so that the pre-cutting liquid jet extends approximately radially to the tubular body.
  • the arrangement of the pre-cutting device above the swivel arm can in particular include that the pre-cutting nozzle and thus the exit point of the further pre-cutting liquid jet is arranged above the swivel arm nozzle.
  • Such an arrangement is particularly advantageous if the liquid is injected into the soil during the pulling of the tubular body via the pre-cutting device.
  • a change in the outlet characteristic of the liquid in the sense of the method according to the invention can be understood in particular to mean that the liquid is first injected by means of the precutting device and then additionally or alternatively by means of the pivoting arm.
  • a particularly advantageous development of the device according to the invention is characterized in that on the outside of the tubular body, in particular above the pivoting arm and / or the precutting device, at least one centering device is provided for centering the tubular body in the borehole.
  • a device configured in this way is particularly well suited for absorbing reaction forces which arise when the liquid jet emerges.
  • the development thus allows the use of particularly high liquid pressures and thus particularly high beam ranges.
  • the centering means suitably comprises a spacer which projects radially from the tubular body and which supports the tubular body against the borehole wall.
  • a centering device can in particular be provided when a comparison with the tubular body diameter larger hole is made before the introduction of the tubular body in the ground by means of a drilling tool or cutting jet.
  • a particularly useful device is further characterized in that an elastic line for supplying the Schwenkarmdüse is provided with liquid on the pivot arm.
  • This elastic conduit is suitably arranged inside the tubular body, where it is particularly well protected by the pending soil.
  • the elastic line can be provided to supply the Schwenkarmdüse also a hinge connection and / or a deflection connection.
  • the pipe connects in a single arc the pipe body with the jet pipe, so that only a small pressure loss arises.
  • a particularly reliable device can be obtained by providing a position sensor for determining the swivel position of the swivel arm, wherein the position sensor is in particular connected to a control device with which a liquid supply can be controlled by means of a pump to the swivel arm nozzle.
  • the control device is suitably provided at the top of the tubular body.
  • the position sensor can in particular serve to determine the swivel angle ⁇ and / or to determine the deployed position.
  • the control means is arranged so that the liquid supply to the Schwenkarmdüse is given only when the pivot arm is in the raised position.
  • the control device may be in communication, for example, with the pump or with a control valve.
  • the device can be used for special foundations for the creation of foundations or for particularly effective extraction of raw materials.
  • it may be useful to provide a discharge device for removing raw material-containing suspension from the tubular body for extracting the pipe material at the bottom surface.
  • the discharge device is designed for the extraction of suspension from the borehole.
  • the raw material extraction may in particular include a separation of the raw material grains from the liquid.
  • a particularly advantageous apparatus for the mining of solid mineral raw materials is further characterized in that at least one line for common or separate supply of Vorschneide gifted and the Schwenkarmdüse is provided with liquid on the tubular body.
  • the pre-cutting device and / or the swivel arm may preferably have a liquid valve. If the line is designed for separate supply, the pre-cutting device and the swivel arm suitably have separate lines.
  • the at least one conduit has the elastic conduit.
  • the tillage method according to the invention is characterized in that a bore is produced in a first step, which extends at least into a soil layer to be processed, and that in the bore of the soil cultivation device is introduced, with which soil material of the soil layer is released.
  • a basic idea of the invention can be seen in the introduction of a liquid in soil layers by means of the device, whereby soil material is purposefully released from the soil. With further supply of liquid, the solids-enriched liquid is displaced from the soil and discharged to the soil surface.
  • the method according to the invention is suitable not only for use in special civil engineering but also for the mining of a large number of solid mineral raw materials.
  • Particularly useful is the process for the degradation of clay minerals, especially kaolin. But other clay minerals such. Bentonite, talc, smectite or mica can be broken down.
  • the mineral raw materials may in particular be sheet silicates.
  • Particularly useful is the process for the degradation of ceramic raw materials.
  • the liquid is selected so that the raw material grains to be degraded are insoluble therein. However, it can also be provided that the raw material grains are at least partially soluble in the liquid.
  • a suspension according to the invention can be understood in particular a slurry of insoluble solid particles in the liquid.
  • the suspension may also be referred to as a grain suspension from a conglomerate.
  • Particularly useful method of the invention for the mining of natural resources which are stored at a depth of about 20 to 100 m.
  • the layer thickness of the raw material deposit can be for example 40 m and the raw material content in the soil about 10 to 30% by volume.
  • the inventive method allows in a particularly simple way, the reduction of such deeper lying deposits of raw materials without basically a costly Schachtewolf would be necessary.
  • the decomposing rod length can basically be introduced into the soil from the earth's surface. But it is also possible to introduce the mining boom, starting from a tunnel or a shaft of a civil engineering in the ground. Also, the mining boom can be introduced from the bottom of an open pit in the soil, whereby an increase in the depth of excavation can be achieved without increasing the diameter of the mining vessel.
  • the degradation rod according to the invention is designed so that the injected fluid has a reach in the radial direction to the degradation boom of 2 to 8 m, in particular of about 10 m, with respect to the longitudinal axis of the mining boom or an outlet opening.
  • raw material grains can be degraded in an approximately cylindrical mining area with a radius of the order of magnitude.
  • the raw material-containing suspension is suitably discharged on the outside of the degradation boom. This is particularly advantageous when the extraction rod length is introduced into a bore which is larger in diameter than the degradation rod itself. In principle, however, it is also possible, the raw material-containing suspension inside the mining boom upwards, i. in the direction of the earth's surface.
  • the removal of the raw material-containing suspension along the degradation rod can basically be done solely due to a displacement effect by the further injected into the soil liquid.
  • pumping means can be provided which assist in the removal of the raw material-containing suspension upwards.
  • a particularly suitable development of the method according to the invention is characterized in that an injection rate for the liquid is set in such a way that a flow velocity of the suspension along the degradation rod length is less than a rate of descent of undesired poor grains.
  • the rate of descent can also be referred to as the return flow rate and the flow rate as the ascent rate.
  • the injection rate i. the per unit of time in the ground supplied amount of liquid, so chosen so that the undesirable bad grains fall faster than they are discharged upward and thus remain in the ground.
  • the bad grains may in particular be coarse particles. In principle, however, the bad grains may also be other undesired admixtures and impurities, for example foreign material additions of material. These may, for example, due to a different density or different surface properties have a different from the rate of desorption of raw material grains different sinking rate.
  • the injection rate is set in such a way that raw material grains having a particle size which is above a certain maximum particle size remain in the soil. In this way, it can be ensured that only fines are removed from the soil, but coarse particles remain in the soil or sink down again and support a cavity which arises during the mining of the raw materials in the mining area. Under fines are understood raw material grains whose particle size is below the largest grain size.
  • the largest grain size can be in particular 1000 .mu.m, preferably 500 .mu.m.
  • the rate of injection of the liquid is adjusted so that the rate of descent of particles of size above the largest grain size greater than the flow rate of the slurry and the rate of descent of particles below the largest grain size is less than the flow rate of the slurry along the degradation length.
  • the flow rate and the rate of descent can be medium values, so that, if appropriate, even a small residual amount of undesired bad grains and / or coarse particles can reach the top.
  • the injection rate to be selected for a certain maximum particle size may also depend, in particular, on an outer diameter of the excavation string and / or an inner diameter of a borehole in which the degradation string is received.
  • the liquid can be chosen arbitrarily.
  • the liquid is water.
  • a particularly rapid and effective extraction of raw materials can be ensured by the fact that the liquid is injected into the soil under high pressure, which can be between 300 and 1500 bar in particular.
  • An injection rate for the liquid is suitably 100 to 2500 l per minute, in particular 400 to 2000 l per minute.
  • the liquid is injected into the soil during the penetration of the extraction stabilizer into the soil, ie during its axial advancing movement, and / or during axial standstill of the decomposition support. It is particularly advantageous, however, that the liquid is injected into the soil during the pulling of the removal rod. In this case, already dissolved soil parts, which are not carried away with the suspension upwards, in a range sink below a cutting jet of the injected liquid, where they do not hinder the cutting jet further. This ensures a particularly effective extraction of raw materials.
  • the degradation boom is repeatedly lowered and at least partially pulled, in particular, an outlet characteristic of the liquid is changed from the degradation boom.
  • an outlet characteristic of the liquid is changed from the degradation boom.
  • the discharge characteristic of the liquid for example, the shape of at least one cutting jet can be changed.
  • the fluid pressure and / or the injection rate can also be changed.
  • the outlet characteristic it is also possible to change at least one exit point of the liquid from the degradation boom.
  • a first injection nozzle for a fluid passage can be opened and a second injection nozzle can be blocked.
  • additional exit points of the liquid can be released to change the exit characteristic.
  • a particularly complete extraction of raw materials can be achieved according to the invention by rotating the degradation rod during the injection of the liquid.
  • an at least approximately cylindrical raw material extraction area can be set in the ground.
  • the degradation rod is also moved during the rotation in the axial direction, in particular pulled. The rotation can be done with the same direction of rotation or alternately.
  • the tubular body and / or the swivel arm is caused to vibrate via a vibration exciter.
  • the applied vibrations are preferably in a range between 10 and 100 Hz the abrasive action of the cutting jet can be increased and the tubular body can be rotated with less force, in particular when the swivel arm is swiveled out.
  • a drilling device for releasing the pending soil is provided at the front end at the lower end of the mining rod.
  • a particularly useful method is that first by means of a drilling tool, a preferably at least partially cased borehole is made in the ground, in which then the mining boom is introduced. In this case, the hole is thus not made by the mining boom itself, but by the drilling tool or by pre-cutting.
  • the drilling tool can in particular have a drill string with a bottom-side arranged drill head.
  • the at least partial piping of the bore can be provided in particular for burglary-prone soils.
  • FIG. 1 A device 60 according to the invention with a disassembly rod 50 is shown in FIG.
  • the degradation rod 50 has a tubular body 2, which is introduced into a borehole 18 in the bottom 40. face side a drilling device 3 is arranged on the tubular body 2, which can be configured, for example, as a drill bit, as a drill head and / or as a displacer head.
  • the drilling device 3 is not mandatory in all cases.
  • a pivoting arm 9 is provided with an end-side jet pipe 8, which opens into a Schwenkarmdüse 10.
  • the swivel arm is shown in an open position, the reference numeral 8a in a rest position on the tubular body 2. While in the rest position, a longitudinal axis of the pivot arm 9 extends approximately parallel to a longitudinal axis 26 of the tubular body 2, includes the longitudinal axis of the pivot arm 9 in the Ausstellposition with the longitudinal axis 26 of the tubular body 2 a pivot angle ⁇ of 90 °.
  • the pivot arm 9 is articulated to a pivot axis 13.
  • the pivot axis 13 extends approximately radially to the longitudinal axis 26 of the tubular body 2.
  • the degradation rod 50 has a pivot drive with a hydraulic cylinder 11 which is articulated on one side on the tubular body 2.
  • piston-side side of the hydraulic cylinder 11 is attached to a rear lever arm 14 of the pivot arm 9 beyond the pivot axis 13.
  • the pivot arm 9 of the hydraulic cylinder 11 is extended, whereby the pivot arm 9 with the Schwenkarmdüse 10, as shown by the broken arrow, in a circular path is pivoted upward.
  • a precutting device 46 is provided on the outside of the tubular body 2.
  • the pre-cutting device 46 has a Vorschneiderohr 6 extending radially to the longitudinal axis 26 of the tubular body 2, on the front side of a Vorschneidüse 7 is arranged.
  • the Schwenkarmdüse 10 is further radially spaced from the longitudinal axis 26 of the tubular body 2 as the Vorschneidüse 7.
  • an exit point for liquid from the Vorschneide issued 46 opposite to a discharge point for liquid from the swing arm 9 is set back ,
  • a first line 4 is arranged.
  • This line 4 is connected via a designed as a piece of hose elastic line 12 with the relatively long, straight jet pipe 8.
  • liquid, in particular water is introduced into the line 4 in the direction of the arrow 16.
  • an annular space is formed in the tubular body 2, which forms a second conduit 5 for the supply of liquid to Vorschneide sensible 46. If liquid in the direction of arrow 15 is fed into this second line 5, then a precutting liquid jet (not shown in FIG. 1) emerges from the precutting nozzle 7.
  • centering devices 21 are provided on the outside of the tubular body 2 above the Vorschneide pain. These as spacers Centering devices 21 formed with an external sliding shoe support the tubular body 2 radially on a borehole wall 1 of the borehole 18.
  • the length of the precut tube 6 is selected so that it is smaller than a borehole radius 23 of the borehole 18 and the excavation rod 50 can thus be introduced unhindered into the borehole 18.
  • the Vorschneide Schemeradius 24 is suitably chosen so that in Vorschneide Scheme 34 pivoting of the pivoting arm 9 is possible in the Ausstellposition, i. the rough cutting region radius 24 is suitably selected to be greater than a radial distance of the swivel arm nozzle 10 from the longitudinal axis 26 of the tubular body 2.
  • the liquid which is injected into the bottom 40 via the jet pipe 8 and / or the precutting device 46, is thereby enriched with soil material, in particular with raw material particles, and then discharged externally on the tubular body 2 in the annular space between the borehole wall 1 and the wall of the tubular body 2 in the direction of arrow 17 upwards.
  • the drilling device 3 can in particular be designed so that it protrudes in the radial direction over the pivot arm 9 in its rest position and thus protects it from pending soil material.
  • FIGS. 2 to 6 Various process stages of an exemplary embodiment of a method according to the invention using the mining rod 50 shown in FIG. 1 are shown in FIGS. 2 to 6. The same reference numerals as in Fig. 1 are used.
  • a borehole 18 is first sunk down to a final depth 38 by means of a drilling tool, not shown, in the bottom 40.
  • the borehole 18 can be formed cased in an upper area.
  • the borehole 18 is configured in such a diameter larger than the tubular body 2, that this can be inserted unimpeded centric into the borehole 18 and lowered therein with the radially projecting Vorschneide issued 46 pivoted arm 9 in a next step.
  • the tubular body 2 After the inserted tubular body 2 rests with its drilling device 3 arranged on the bottom side at the bottom of the borehole 18, the tubular body 2 is initially inserted further into the ground until the precutting device 46 is located just above the final depth 38.
  • ablation effect of the drilling device 3 at the bottom of the hole which can be generated in particular by a rotation of the tubular body 2, a feed hole 31 is thereby produced centrally and smaller diameter to the wellbore 18.
  • liquid may optionally be supplied via the line 4 to the pivoted-in swivel arm 14, the liquid then emerging from the swivel-arm nozzle 10 near the drilling device 3.
  • liquid is supplied under pressure to the pre-cutting device 46 via the line 5, thereby generating a pre-cutting liquid jet 43 in the radial direction to the longitudinal axis 26 of the tubular body 2.
  • the tubular body 2 is rotated and pulled in the direction of arrow 30. Due to the action of the precut liquid jet 43, soil material in the precut area 34 is released and / or loosened.
  • This process stage is shown in FIG. During the entire process, the liquid introduced into the bottom 40 via the lines 4, 5 and enriched there with soil material is discharged upward in the direction of the arrow 17 on the outside of the tubular body 2.
  • the tubular body 2 is then re-inserted into the ground without further supply of liquid until the exhibited pivot arm 9 has reached about the final depth 38.
  • To facilitate the feed tube body 2 can also be rotated.
  • both the precutting device 46 and the jet pipe 8 are supplied with liquid under pressure, whereby the precutting liquid jet 43 again adjusts itself to the precutting device 46 and a liquid jet 41 at the jet pipe 8.
  • the tubular body 2 is set in rotation again and pulled in the axial direction. This process stage is shown in FIG.
  • the approximately radially to the tubular body 2 directed liquid jet 41 has a greater range than the Vorschneide liquid jet 43 and loosens and / or dissolves raw material-containing soil in comparison with the Vorschneide Society 34 larger diameter excavation area 35.
  • the height of the excavation area 35 is increased.
  • the Vorschneiderohr 6 and / or the Vorschneidüse 7 is arranged offset in the circumferential direction of the tubular body 2 with respect to the pivoted-out pivot arm 9.
  • the drawing with activated liquid jet 41 and simultaneously activated Vorschneide liquid jet 43 can be continued in particular until the swing arm 9 has reached the upper end of a raw material-containing soil layer, wherein continuously enriched Liquid is discharged in the direction of arrow 17. After reaching the upper end of the raw material-containing soil layer of the liquid jet 41 and the Vorschneide liquid jet 43 are deactivated, pivoted the pivot arm 9 in the rest position and the degradation boom 50 completely pulled.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)

Claims (16)

  1. Dispositif pour le travail du sol, en particulier pour extraire des matières premières minérales solides, avec un corps tubulaire (2) pouvant être enfoncé dans le sol, au moins un bras pivotant (9) avec un tube de pulvérisation (8) étant placé à l'extrémité côté sol du corps tubulaire (2), bras qui est mobile d'une position de repos sur le corps tubulaire (2) jusqu'à une position déployée dans laquelle le bras pivotant (9) dépasse latéralement du corps tubulaire (2) et, pour produire un jet de découpe liquide, le tube de pulvérisation (8) débouche pour l'essentiel en ligne droite dans une buse de pulvérisation (10),
    caractérisé en ce que sur le corps tubulaire (2) à distance du bras pivotant (9) au nombre d'au moins un, il est prévu un dispositif de prédécoupe (46) destiné à produire un jet (43) de liquide de prédécoupe qui est dirigé transversalement à l'axe du corps tubulaire (2).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'à l'extérieur sur le corps tubulaire (2), en particulier au-dessus du bras pivotant (9, 14) et/ou du dispositif de prédécoupe (46), il est prévu au moins un dispositif de centrage (21) pour centrer le corps tubulaire (2) dans un trou de forage (18).
  3. Dispositif selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que la direction du jet (43) de liquide de prédécoupe du dispositif de prédécoupe (46) est pivotée en vue en plan par rapport à la direction du jet (41) de découpe liquide du tube de pulvérisation (8).
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'une conduite élastique (12) est prévue sur le bras pivotant (9) pour alimenter la buse (10) du bras pivotant en liquide.
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu' un capteur est placé dans le bras pivotant (9), qui transmet des données, en particulier relatives à la position du bras pivotant (9), en direction de la surface du sol.
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le déploiement du bras pivotant (9) s'effectue par un mécanisme de déplacement (11) situé sur la partie inférieure du corps tubulaire (2), qui peut être actionné depuis la surface du sol.
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le pivotement du bras pivotant (9) s'effectue par le fait qu'une barre d'entraînement ou un tube enveloppant est déplacé relativement de façon parallèle au corps tubulaire (2).
  8. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'angle de pivotement α du jet (41) de découpe liquide est compris dans une plage de 45° à 120°, et forme en particulier un angle d'environ 90°.
  9. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que sur la surface du sol est prévu un dispositif d'évacuation pour évacuer du corps tubulaire (2) une suspension contenant des matières premières en vue de l'extraction des matières premières.
  10. Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'un générateur de vibrations est prévu, avec lequel le corps tubulaire (2) et/ou le bras pivotant (9) peut être mis en vibrations.
  11. Procédé de travail du sol avec un dispositif (60) de travail du sol selon l'une quelconque des revendications 1 à 10, dans lequel :
    - dans une première étape, un forage (18) est réalisé, qui va au moins jusqu'à une couche de sol à traiter, et
    - dans le forage (18), du matériau de la couche de sol est détaché avec un jet liquide (41) par déploiement d'au moins un bras pivotant (9) d'un dispositif de travail du sol (60),
    caractérisé en ce que
    - avant le déploiement du bras pivotant (9), un rayon (23) du forage (18) est coupé par un jet (43) de liquide de prédécoupe d'un dispositif de prédécoupe ((46) jusqu'à un rayon intermédiaire (24) qui est tel que le bras pivotant (9) peut être amené dans une position transversale par rapport à l'axe du corps tubulaire (2).
  12. Procédé selon la revendication 11, caractérisé en ce qu'au plus tard après avoir atteint une position transversale du bras pivotant (9), le diamètre du forage est agrandi jusqu'à un rayon d'enlèvement (25) avec un jet liquide (41).
  13. Procédé selon la revendication 11 ou 12, caractérisé en ce que, pour enlever et extraire des matières premières minérales, en particulier des minéraux argileux, la suspension de liquide de coupe et de matières premières minérales enlevées est transportée à travers le forage (18) jusqu'à la surface du sol, le courant de transport étant maintenu par le fait que du liquide de coupe supplémentaire est introduit par l'intermédiaire de la buse (10) du bras pivotant et/ou du dispositif de prédécoupe (46).
  14. Procédé selon l'une quelconque des revendications 11 à 13, caractérisé en ce que le corps tubulaire (2) est centré dans le forage (18) afin de supporter les forces de réaction et d'agrandir le rayon d'enlèvement (25) du jet (41) de découpe liquide.
  15. Procédé selon l'une quelconque des revendications 13 ou 14, caractérisé en ce que le rayon (23) du forage (18) est choisi en proportion de la surface de section transversale du corps tubulaire (2), de telle manière qu'il s'instaure une vitesse d'écoulement vers le haut dans le forage (18) qui est telle que seul un diamètre de grain fin prédéterminé de la matière première minérale enlevée soit transporté vers le haut dans la suspension, tandis que le grain grossier indésirable descend dans la partie inférieure du forage (18).
  16. Procédé selon l'une quelconque des revendications 11 à 15, caractérisé en ce qu'au moyen d'un outil de forage, on réalise d'abord dans le sol (40) un trou de forage (18) au moins partiellement tubé, dans lequel le train d'enlèvement (50) est ensuite introduit.
EP05010058A 2004-05-28 2005-05-09 Dispositif et procédé pour le forage hydraulique Active EP1600602B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004026234 2004-05-28
DE102004026234A DE102004026234B3 (de) 2004-05-28 2004-05-28 Vorrichtung und Verfahren zur Bearbeitung des Bodens

Publications (3)

Publication Number Publication Date
EP1600602A2 EP1600602A2 (fr) 2005-11-30
EP1600602A3 EP1600602A3 (fr) 2006-03-01
EP1600602B1 true EP1600602B1 (fr) 2006-12-27

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EP (1) EP1600602B1 (fr)
AT (1) ATE349599T1 (fr)
DE (2) DE102004026234B3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008056261B4 (de) * 2008-11-06 2011-06-16 Bauer Spezialtiefbau Gmbh Ventilzentrierung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2217360A (en) * 1938-05-18 1940-10-08 Shell Dev Hydraulic disruption of solids
DE2035934A1 (de) * 1970-07-20 1972-02-03 Dedegil, Yavuz, Dipl.-Ing.; Weber, Manfred, Dr.-Ing.; 7500 Karlsruhe Hydraulisch-pneumatisches Verfahren zum Abtragen oder Abbauen von Feststoffen unter Wasser oder sonstigen Flüssigkeiten
US5181578A (en) * 1991-11-08 1993-01-26 Lawler O Wayne Wellbore mineral jetting tool
US5363927A (en) * 1993-09-27 1994-11-15 Frank Robert C Apparatus and method for hydraulic drilling

Also Published As

Publication number Publication date
DE102004026234B3 (de) 2005-10-06
EP1600602A3 (fr) 2006-03-01
EP1600602A2 (fr) 2005-11-30
DE502005000254D1 (de) 2007-02-08
ATE349599T1 (de) 2007-01-15

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