EP3361040B1 - Soil processing tool and method for creating a hole in the soil - Google Patents
Soil processing tool and method for creating a hole in the soil Download PDFInfo
- Publication number
- EP3361040B1 EP3361040B1 EP17155833.1A EP17155833A EP3361040B1 EP 3361040 B1 EP3361040 B1 EP 3361040B1 EP 17155833 A EP17155833 A EP 17155833A EP 3361040 B1 EP3361040 B1 EP 3361040B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mixing
- processing tool
- central shaft
- ground
- ground processing
- 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.)
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Links
- 238000000034 method Methods 0.000 title claims description 11
- 239000002689 soil Substances 0.000 title description 51
- 239000000463 material Substances 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 20
- 239000000725 suspension Substances 0.000 claims description 19
- 238000005553 drilling Methods 0.000 claims description 15
- 239000011435 rock Substances 0.000 claims description 3
- 238000003971 tillage Methods 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
Classifications
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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
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
-
- 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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- 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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
Definitions
- the invention relates to a soil working tool, in particular a drilling tool, having a center shaft in which a duct is formed, and at least one mixing blade, which is attached to the center shaft and extends approximately radially outward, according to the preamble of claim 1.
- the invention further relates to a method for producing a hole in the ground with a soil working tool, wherein soil material is removed with the soil working tool and mixed in the created bore with a liquid to form a suspension, which via at least one opening on the at least one mixing blade via the conduit in the soil working tool is sucked, according to the preamble of claim 10.
- a generic prior art for example, from the EP 1 045 073 A1 out.
- a bore is created by means of a cutting device which removes soil material.
- the processed soil material is conveyed to an upper mixing area, in which the processed soil material is comminuted by mixing blades and mixed with a supplied rinsing liquid.
- Another drilling tool is out of the EP 2 703 596 A1 known. Through an opening on the central drill stem, a mixed suspension can be sucked off and transported upwards out of the drill hole.
- the US 2010/1026206 A1 teaches a drill bit which is formed with openings for cooling liquid.
- the WO 00/50358 teaches a device and a method for creating piles in a ground, wherein a displacement drill is provided with an opening arranged on a bottom for injecting concrete. Furthermore, an apparatus and method for creating annular foundations is disclosed.
- a double head drilling apparatus and method are known.
- a support tube and a second rotary drive an internal endless screw is driven.
- the invention has for its object to provide a tillage tool and a method for creating a hole, with which a particularly good crushing and mixing of the removed soil material are made possible.
- At least one mixing blade is formed with an inner cavity, that the cavity communicates with the conduit in the center shaft and that at least one opening of the cavity is formed on the mixing blade to an outer side.
- a basic idea of the invention can be seen in a mixing region, in which the processed soil material is further comminuted by the rotating mixing blades and mixed with a supplied liquid, via at least one opening on at least one mixing blade.
- the suction does not take place directly at the center shaft but further away from it in the mixing space.
- This leads to an overall improved comminution and mixing of the removed soil material.
- the mixing space is better utilized, with a relatively uniform consistency of the suspension produced over large areas of the mixing space is generated.
- annular peripheral wall which is mounted on the central shaft and annularly surrounds a mixing region, in which the at least one mixing blade is arranged.
- the annular peripheral wall corresponds approximately to the bore diameter, which is usually slightly smaller.
- the peripheral wall has an upper deck area, wherein a hood-like mixing bell is formed. This results in a delimitation of the mixing area upwards, so that in the mixing area substantially only the removed soil material and liquid, in particular rinsing liquid, are supplied.
- the rinsing liquid may be the supporting liquid in the borehole or a special liquid which is introduced via a supply line directly into the mixing area.
- the annular peripheral wall and the deck area can be fixedly attached to the central shaft his. It is advantageous according to a development of the invention that the annular peripheral wall is rotatably mounted relative to the central shaft. This results in additional shear forces within the mixing area, which leads to an improvement of the mixing and crushing.
- a further preferred embodiment according to the invention is that a plurality of mixing blades are arranged in the middle shaft.
- several mixing blades can be provided with the cavity and the openings for sucking off the suspension.
- in addition to these hollow mixing blades and normal mixing blades are provided without a cavity.
- the normal mixing blades and the mixing blades provided with the suction holes are distributed around the center shaft.
- the mixing blades may have a front cutting edge, which is reinforced with closure or cutting plates.
- a further increase of shear forces in the suspension to be mixed results according to a development of the invention in that at least one mixing element is arranged on an inner side of the annular peripheral wall.
- a plurality of mixing elements are arranged, which are preferably formed as radially projecting sheets.
- a connection device for a line connection of a suction device is provided at an upper region of the central shaft.
- one or more drill pipes can be connected, which preferably extend into a region outside the borehole. From there, the discharged suspension can be further removed via a rotary connection via a hose device. It is such a particularly environmentally friendly removal of removed soil material possible, especially in cohesive soils.
- the tillage tool can be used as a pure mixing or comminution component.
- a preferred embodiment of the invention consists in that a removal device for removing soil material is arranged on a lower side.
- the removal device has erosion teeth for removing the soil material.
- the teeth are basically detachably mounted in corresponding tooth mounts.
- a conveying device for conveying the removed soil material is arranged between the removal device and the at least one mixing element.
- the conveyor may have a single or more conveyor coils.
- the removed from the ablation and still relatively coarse soil material is conveyed upwards in the mixing and crushing area.
- the rotating mixing elements which are preferably provided with a front cutting edge, the soil material is crushed in a desired manner.
- a rinsing or supporting liquid is introduced directly or indirectly into the mixing chamber, wherein the liquid is mixed by the rotating mixing blades with the crushed soil material to form a suspension. This can then preferably be sucked off continuously via the openings in the at least one mixing blade.
- the invention relates to a drill for soil and rock drilling, which is characterized in that a tillage tool is provided, as described above.
- the drill may be arranged with an undercarriage for drilling on land or on a watercraft, such as a pontoon or a drillship.
- a suction device is provided with which removed soil material can be sucked into the center shaft via the at least one opening in the mixing blade through the conduit into the central shaft.
- the suction device may be a pump, which is arranged on the drill outside the borehole.
- the invention relates to a method for producing a hole in the soil with the soil working tool described above, wherein soil material is removed with the soil working tool and mixed in the created bore with a liquid to form a suspension, which via at least one opening on the at least one mixing blade on the Cable channel in the center is sucked off.
- a preferred process variant of the invention is that the suspension is discharged from the bore.
- hard rock material or boulders can be processed within a drill pipe or foundation pipe, crushed and discharged from the borehole as a suspension. This is particularly advantageous in offshore applications, such as the introduction of foundation pipes for wind turbines or turbines.
- An inventive tillage tool 10 has a tubular center shaft 12, at the lower end of a centering tip 76 is arranged. From the centering tip 76 helically extends a removal device 70 along the center shaft 12 upwards. Flat teeth 72 with cutting edges are arranged on an outer edge of a drill spiral, which merges into a conveyor 80 for the removal of the removed soil material upwards. By the conveyor 80, the removed soil material is conveyed into a mixing area in a central area of the central shaft 12. In this mixing area, radially projecting flat mixing blades 20 and a single box-shaped mixing blade 30 are disposed on the center shaft 12.
- the box-shaped mixing blade 30 has an approximately cuboid hollow suction box 32. On its upper side five circular openings 34 are arranged for sucking suspension from the mixing area. At a forward in the direction of rotation front of the box-shaped mixing blade 30, a swept front portion 36 with attached wear plates 38 is arranged.
- the inner cavity of the suction box 32 of the box-shaped mixing blade 30 is connected via an unillustrated aperture in the central shaft 12 to a central duct 14 formed in the tubular central shaft 12.
- a connection device 60 is arranged, with which the center shaft 12 can be connected to further drill pipes with line connection.
- axially directed keyway 62 is attached to the outside of the top of the center shaft. This engages positively in a corresponding keyway on an inner side of the attached drill pipe. In this way, a torque from a rotary drive of a drilling apparatus, not shown, can be transmitted to the soil working tool 10.
- the soil material removed by the removal device 70 is mixed in the middle mixing region of the soil cultivation tool 10 with liquid supplied to form a suspension.
- the radially projecting mixing blades 20, 30 serve not only for mixing, but also for further comminution of the removed soil material, so that this reliable with the liquid through the openings 34 by means of a, generated by a pump, not shown, negative pressure can be sucked off.
- cutting plates 22 made of hard metal are welded to the sword-shaped flat mixing blades 20 on the narrow front sides.
- a recess 24 and a support plate 26 are arranged on each sword-shaped mixing blade 20, thereby an improved Verwirbelungs- and thus mixing effect is generated.
- the mixing hood 40 has a cylindrical, drum-shaped peripheral wall 42, which is open at the bottom and closed with an upper plate-shaped cover portion 44 upwards.
- an axially directed bearing sleeve 46 connects, which is connected via stiffening plates 48 fixed to the deck area 44.
- the mixing hood 40 is mounted relatively rotatably via a sliding sleeve 49 on the central shaft 12.
- web-shaped mixing elements 50 are arranged, which lead to an increase of the shear forces in the mixing area.
- the edges of the mixing surfaces can be provided with punctiform wear elements.
- FIGS. 4 and 5 Another inventive tillage tool 10, which is also designed as a drilling tool is in the FIGS. 4 and 5 shown.
- the bell-shaped mixing hood 40 is omitted, which is formed as in the previous embodiment.
- This second embodiment of a soil cultivation tool 10 according to the invention is similar to the previously described soil cultivation tool according to FIGS FIGS. 1 to 3 formed, but as a removal device 70 instead of the flat teeth 72 drill bit 74 are arranged with punctiform Abtragsbeat.
- the drill bits 74 are disposed in corresponding drill bit mounts along the free edge of the helical conveyor 80, the diameter of which gradually widens upwardly from the centering tip 76 to the maximum outside diameter.
- the centering tip 76 is in this embodiment according to the FIGS.
- FIG. 4 and 5 also formed with drill bits 74. Especially vivid is in the presentation according to Fig. 5 the box-shaped mixing element 30 with the cuboid suction box 32 shown. At the top are the openings 34 arranged for sucking the suspension formed from the liquid and the comminuted soil material.
- a particularly compact inventive soil cultivation tool 10 is in the FIGS. 6 and 7 shown, wherein also the bell-like mixing hood 40 is omitted for reasons of clarity.
- the soil working tool 10 according to the FIGS. 6 and 7 differs from the previous tillage tools in that the removal device 70 is formed for removing the soil material substantially as a radially extending cutting edge.
- the cutting edge is formed by a plurality of circumferentially projecting flat teeth 72.
- the adjoining surface is designed as a short spiral segment for forming a conveyor 80.
- For centering is a centering tip 76 according to the first embodiment of the FIGS. 1 to 3 arranged.
- All variants of the soil working tool 10 according to the invention can be used on a conventional drilling rig with an undercarriage, an uppercarriage and a mast with a drill drive arranged thereon, and in particular with flydrill systems and onshore and offshore drilling rigs.
- the soil working tool is connected to the lower end of a drill pipe, which can be rotationally driven by the drive and axially moved up and down.
- the removed soil material is mixed via a feed opening, not shown here, with a liquid in the mixing area below the mixing hood 40 through the rotating mixing blades 20, 30.
- the removed soil material is further comminuted, so that the suspension thus produced can be suctioned off via the openings 34 in the box-shaped mixing blade 30 and discharged upwards from the borehole via the conduit 14.
- the outer diameter of the mixing hood 40 substantially corresponds to the bore diameter of the bore, which is produced by the removal device 70.
- the annular cover region 44 of the mixing hood 40 separates the mixing region from the overlying bore region.
- the bore can be filled with a support liquid or a support suspension.
- the drilling tool After drilling the borehole and discharging the so-removed soil material, the drilling tool can be withdrawn from the borehole.
- the support liquid can be recovered and at the same time the wellbore be filled with a curable suspension. This can harden to a bored pile in the ground.
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Crushing And Pulverization Processes (AREA)
- Earth Drilling (AREA)
Description
Die Erfindung betrifft ein Bodenbearbeitungswerkzeug, insbesondere Bohrwerkzeug, mit einem Mittenschaft, in welchem ein Leitungskanal ausgebildet ist, und mindestens einem Mischblatt, welches an dem Mittenschaft angebracht ist und sich etwa radial nach außen erstreckt, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a soil working tool, in particular a drilling tool, having a center shaft in which a duct is formed, and at least one mixing blade, which is attached to the center shaft and extends approximately radially outward, according to the preamble of claim 1.
Die Erfindung betrifft weiterhin ein Verfahren zum Herstellen einer Bohrung im Boden mit einem Bodenbearbeitungswerkzeug, wobei Bodenmaterial mit dem Bodenbearbeitungswerkzeug abgetragen und in der erstellten Bohrung mit einer Flüssigkeit zu einer Suspension vermengt wird, welche über mindestens eine Öffnung an dem mindestens einen Mischblatt über den Leitungskanal in dem Bodenbearbeitungswerkzeug abgesaugt wird, gemäß dem Oberbegriff des Anspruchs 10.The invention further relates to a method for producing a hole in the ground with a soil working tool, wherein soil material is removed with the soil working tool and mixed in the created bore with a liquid to form a suspension, which via at least one opening on the at least one mixing blade via the conduit in the soil working tool is sucked, according to the preamble of
Ein gattungsgemäßer Stand der Technik geht beispielsweise aus der
Ein weiteres Bohrwerkzeug ist aus der
Die
Aus der
Die
Aus der
Der Erfindung liegt die Aufgabe zugrunde, ein Bodenbearbeitungswerkzeug und ein Verfahren zum Erstellen einer Bohrung anzugeben, mit welchen ein besonders gutes Zerkleinern und Vermischen des abgetragenen Bodenmaterials ermöglicht werden.The invention has for its object to provide a tillage tool and a method for creating a hole, with which a particularly good crushing and mixing of the removed soil material are made possible.
Die Aufgabe wird zum einen durch ein Bodenbearbeitungswerkzeug mit den Merkmalen des Anspruchs 1 und zum anderen durch ein Verfahren mit den Merkmalen des Verfahrensanspruchs 10 gelöst. Bevorzugte Ausführungsformen der Erfindung sind in den jeweils abhängigen Ansprüchen angegeben.The object is on the one hand by a tillage tool with the features of claim 1 and on the other by a method with the features of Method claim 10 solved. Preferred embodiments of the invention are specified in the respective dependent claims.
Bei dem erfindungsgemäßen Bodenbearbeitungswerkzeug ist vorgesehen, dass mindestens ein Mischblatt mit einem inneren Hohlraum ausgebildet ist, dass der Hohlraum mit dem Leitungskanal in dem Mittenschaft in Verbindung steht und dass an dem Mischblatt mindestens eine Öffnung des Hohlraumes zu einer Außenseite ausgebildet ist.In the soil working tool according to the invention it is provided that at least one mixing blade is formed with an inner cavity, that the cavity communicates with the conduit in the center shaft and that at least one opening of the cavity is formed on the mixing blade to an outer side.
Eine Grundidee der Erfindung kann darin gesehen werden, in einem Mischbereich, in welchem das abgearbeitete Bodenmaterial durch die rotierenden Mischblätter weiter zerkleinert und mit einer zugeführten Flüssigkeit vermengt wird, über mindestens eine Öffnung an mindestens einem Mischblatt abzusaugen. Somit erfolgt die Absaugung nicht unmittelbar an dem Mittenschaft sondern davon weiter beabstandet im Mischraum. Dies führt zu einer insgesamt verbesserten Zerkleinerung und Vermischung des abgetragenen Bodenmaterials. Zudem wird der Mischraum besser ausgenutzt, wobei eine relativ gleichmäßige Konsistenz der hergestellten Suspension über große Bereiche des Mischraumes erzeugt wird.A basic idea of the invention can be seen in a mixing region, in which the processed soil material is further comminuted by the rotating mixing blades and mixed with a supplied liquid, via at least one opening on at least one mixing blade. Thus, the suction does not take place directly at the center shaft but further away from it in the mixing space. This leads to an overall improved comminution and mixing of the removed soil material. In addition, the mixing space is better utilized, with a relatively uniform consistency of the suspension produced over large areas of the mixing space is generated.
Gemäß der Erfindung ist eine ringförmige Umfangswand vorgesehen, welche an dem Mittenschaft gelagert ist und einen Mischbereich ringförmig umgibt, in welchem das mindestens eine Mischblatt angeordnet ist. Die ringförmige Umfangswand entspricht dabei etwa dem Bohrungsdurchmesser, wobei dieser üblicherweise etwas kleiner ist. Durch die ringförmige Umfangswand wird ein definierter Mischbereich umschlossen, was zu einer Verbesserung des Mischergebnisses beiträgt.According to the invention, an annular peripheral wall is provided, which is mounted on the central shaft and annularly surrounds a mixing region, in which the at least one mixing blade is arranged. The annular peripheral wall corresponds approximately to the bore diameter, which is usually slightly smaller. By the annular peripheral wall a defined mixing area is enclosed, which contributes to an improvement of the mixing result.
Besonders bevorzugt ist es nach einer Weiterbildung der Erfindung, dass die Umfangswand einen oberen Deckbereich aufweist, wobei eine haubenartige Mischglocke gebildet ist. Hierdurch erfolgt eine Abgrenzung des Mischbereiches nach oben, so dass im Mischbereich im Wesentlichen nur das abgetragene Bodenmaterial und Flüssigkeit, insbesondere Spülflüssigkeit, zugeführt werden. Die Spülflüssigkeit kann die Stützflüssigkeit in dem Bohrloch oder eine spezielle Flüssigkeit sein, welche über eine Zuführleitung unmittelbar in den Mischbereich eingeleitet wird. Grundsätzlich können die ringförmige Umfangswand sowie der Deckbereich fest an dem Mittenschaft angebracht sein. Vorteilhaft ist es nach einer Weiterbildung der Erfindung, dass die ringförmige Umfangswand drehbar gegenüber dem Mittenschaft gelagert ist. Hierdurch ergeben sich zusätzliche Scherkräfte innerhalb des Mischbereichs, was zu einer Verbesserung der Vermischung und Zerkleinerung führt.It is particularly preferred according to a development of the invention that the peripheral wall has an upper deck area, wherein a hood-like mixing bell is formed. This results in a delimitation of the mixing area upwards, so that in the mixing area substantially only the removed soil material and liquid, in particular rinsing liquid, are supplied. The rinsing liquid may be the supporting liquid in the borehole or a special liquid which is introduced via a supply line directly into the mixing area. In principle, the annular peripheral wall and the deck area can be fixedly attached to the central shaft his. It is advantageous according to a development of the invention that the annular peripheral wall is rotatably mounted relative to the central shaft. This results in additional shear forces within the mixing area, which leads to an improvement of the mixing and crushing.
Eine weitere bevorzugte Ausführungsvariante besteht nach der Erfindung darin, dass mehrere Mischblätter in dem Mittenschaft angeordnet sind. Dabei können mehrere Mischblätter mit dem Hohlraum und den Öffnungen zum Absaugen der Suspension vorgesehen sein. Vorteilhaft ist es dabei auch, dass neben diesen hohlen Mischblättern auch normale Mischblätter ohne Hohlraum vorgesehen sind. Vorzugsweise sind die normalen Mischblätter und die mit den Absaugöffnungen versehenen Mischblätter verteilt um den Mittenschaft herum angeordnet. Die Mischblätter können eine vordere Schneidkante aufweisen, welche mit Verschluss- oder Schneidplatten bewehrt ist.A further preferred embodiment according to the invention is that a plurality of mixing blades are arranged in the middle shaft. In this case, several mixing blades can be provided with the cavity and the openings for sucking off the suspension. It is also advantageous that in addition to these hollow mixing blades and normal mixing blades are provided without a cavity. Preferably, the normal mixing blades and the mixing blades provided with the suction holes are distributed around the center shaft. The mixing blades may have a front cutting edge, which is reinforced with closure or cutting plates.
Eine weitere Erhöhung von Scherkräften in der zu mischenden Suspension ergibt sich nach einer Weiterbildung der Erfindung dadurch, dass an einer Innenseite der ringförmigen Umfangwand mindestens ein Mischelement angeordnet ist. Vorzugsweise sind mehrere Mischelemente angeordnet, welche vorzugsweise als radial vorstehende Bleche ausgebildet sind.A further increase of shear forces in the suspension to be mixed results according to a development of the invention in that at least one mixing element is arranged on an inner side of the annular peripheral wall. Preferably, a plurality of mixing elements are arranged, which are preferably formed as radially projecting sheets.
Nach einer Weiterbildung der Erfindung ist es bevorzugt, dass an einem oberen Bereich des Mittenschaftes eine Anschlusseinrichtung für einen Leitungsanschluss einer Absaugeinrichtung vorgesehen ist. Insbesondere können ein oder mehrere Gestängerohre angeschlossen werden, welche sich vorzugsweise bis in einen Bereich außerhalb des Bohrloches erstrecken. Von dort kann die abgeführte Suspension über einen Drehanschluss über eine Schlaucheinrichtung weiter abgeführt werden. Es ist so ein besonders umweltschonendes Abführen von abgetragenem Bodenmaterial möglich, insbesondere bei bindigen Böden.According to a development of the invention, it is preferred that a connection device for a line connection of a suction device is provided at an upper region of the central shaft. In particular, one or more drill pipes can be connected, which preferably extend into a region outside the borehole. From there, the discharged suspension can be further removed via a rotary connection via a hose device. It is such a particularly environmentally friendly removal of removed soil material possible, especially in cohesive soils.
Grundsätzlich kann das Bodenbearbeitungswerkzeug als reine Misch- oder Zerkleinerungskomponente eingesetzt werden. Eine bevorzugte Ausführungsvariante der Erfindung besteht darin, dass an einer Unterseite eine Abtragseinrichtung zum Abtragen von Bodenmaterial angeordnet ist. Die Abtragseinrichtung weist Abtragszähne zum Abtragen des Bodenmaterials auf. Die Zähne sind grundsätzlich lösbar in entsprechenden Zahnhalterungen angebracht.In principle, the tillage tool can be used as a pure mixing or comminution component. A preferred embodiment of the invention consists in that a removal device for removing soil material is arranged on a lower side. The removal device has erosion teeth for removing the soil material. The teeth are basically detachably mounted in corresponding tooth mounts.
Besonders vorteilhaft ist es nach einer weiteren Ausführungsform der Erfindung, dass zwischen Abtragseinrichtung und dem mindestens einen Mischelement eine Fördereinrichtung zum Fördern des abgetragenen Bodenmaterials angeordnet ist.According to a further embodiment of the invention, it is particularly advantageous for a conveying device for conveying the removed soil material to be arranged between the removal device and the at least one mixing element.
Die Fördereinrichtung kann dabei eine einzelne oder mehrere Förderwendeln aufweisen. Durch die Fördereinrichtung wird das von der Abtragseinrichtung abgetragene und noch relativ grobe Bodenmaterial nach oben in den Misch- und Zerkleinerungsbereich gefördert. Durch die rotierenden Mischelemente, welche vorzugsweise mit einer vorderen Schneidkante versehen sind, wird das Bodenmaterial in gewünschter Weise zerkleinert. Dabei wird eine Spül- oder Stützflüssigkeit direkt oder indirekt in den Mischraum eingeleitet, wobei die Flüssigkeit durch die rotierenden Mischblätter mit dem zerkleinerten Bodenmaterial zu einer Suspension vermengt wird. Diese kann dann vorzugsweise kontinuierlich über die Öffnungen in dem mindestens einen Mischblatt abgesaugt werden. Grundsätzlich ist es jedoch auch möglich, über eine oder mehrere Öffnungen an dem mindestens einen Mischblatt auch unmittelbar Flüssigkeit in den Mischraum einzuspeisen.The conveyor may have a single or more conveyor coils. By the conveyor, the removed from the ablation and still relatively coarse soil material is conveyed upwards in the mixing and crushing area. By the rotating mixing elements, which are preferably provided with a front cutting edge, the soil material is crushed in a desired manner. In this case, a rinsing or supporting liquid is introduced directly or indirectly into the mixing chamber, wherein the liquid is mixed by the rotating mixing blades with the crushed soil material to form a suspension. This can then preferably be sucked off continuously via the openings in the at least one mixing blade. In principle, however, it is also possible to feed liquid into the mixing chamber directly via one or more openings on the at least one mixing blade.
Weiterhin betrifft die Erfindung ein Bohrgerät zum Erd- und Gesteinsbohren, welches dadurch gekennzeichnet ist, dass ein Bodenbearbeitungswerkzeug vorgesehen ist, wie es zuvor beschrieben wurde. Das Bohrgerät kann mit einem Unterwagen zum Bohren an Land oder an einem Wasserfahrzeug, etwa einem Ponton oder einem Bohrschiff angeordnet sein.Furthermore, the invention relates to a drill for soil and rock drilling, which is characterized in that a tillage tool is provided, as described above. The drill may be arranged with an undercarriage for drilling on land or on a watercraft, such as a pontoon or a drillship.
Besonders bevorzugt ist es nach einer Weiterbildung der Erfindung, dass eine Absaugeinrichtung vorgesehen ist, mit welcher abgetragenes Bodenmaterial über die mindestens eine Öffnung in dem Mischblatt durch den Leitungskanal in den Mittenschaft absaugbar ist. Die Absaugeinrichtung kann dabei eine Pumpe sein, welche an dem Bohrgerät außerhalb des Bohrloches angeordnet ist.According to a development of the invention, it is particularly preferred that a suction device is provided with which removed soil material can be sucked into the center shaft via the at least one opening in the mixing blade through the conduit into the central shaft. The suction device may be a pump, which is arranged on the drill outside the borehole.
Weiterhin betrifft die Erfindung ein Verfahren zum Herstellen einer Bohrung im Boden mit dem zuvor beschriebenen Bodenbearbeitungswerkzeug, wobei Bodenmaterial mit dem Bodenbearbeitungswerkzeug abgetragen und in der erstellten Bohrung mit einer Flüssigkeit zu einer Suspension vermengt wird, welche über mindestens eine Öffnung an dem mindestens einen Mischblatt über den Leitungskanal in dem Mittenschaft abgesaugt wird. Mit diesem Verfahren können die zuvor beschriebenen Vorteile erzielt werden.Furthermore, the invention relates to a method for producing a hole in the soil with the soil working tool described above, wherein soil material is removed with the soil working tool and mixed in the created bore with a liquid to form a suspension, which via at least one opening on the at least one mixing blade on the Cable channel in the center is sucked off. With this method, the advantages described above can be achieved.
Eine bevorzugte Verfahrensvariante der Erfindung besteht darin, dass die Suspension aus der Bohrung abgeführt wird. Auf diese Weise können innerhalb eines Bohrrohres oder Gründungsrohres hartes Gesteinsmaterial oder Findlinge abgearbeitet, zerkleinert und aus dem Bohrloch als Suspension abgeführt werden. Das ist insbesondere bei Offshore-Anwendungen vorteilhaft, etwa beim Einbringen von Gründungsrohren für Windanlagen oder Strömungsturbinen.A preferred process variant of the invention is that the suspension is discharged from the bore. In this way, hard rock material or boulders can be processed within a drill pipe or foundation pipe, crushed and discharged from the borehole as a suspension. This is particularly advantageous in offshore applications, such as the introduction of foundation pipes for wind turbines or turbines.
Die Erfindung wird nachfolgend anhand von bevorzugten Ausführungsbeispielen beschrieben, welche schematisch in den Zeichnungen dargestellt sind. In den Zeichnungen zeigen:
- Fig. 1
- eine schematische Querschnittsansicht durch ein erfindungsgemäßes Bodenbearbeitungswerkzeug;
- Fig. 2
- eine Ansicht von oben auf das Bodenbearbeitungswerkzeug gemäß
Fig. 1 ; - Fig. 3
- eine perspektivische Ansicht des Bodenbearbeitungswerkzeuges von
Fig. 1 undFig. 2 ; - Fig. 4
- eine Ansicht von oben auf ein weiteres erfindungsgemäßes Bodenbearbeitungswerkzeug;
- Fig. 5
- eine perspektivische Ansicht des Bodenbearbeitungswerkzeuges von
Fig. 4 ; - Fig. 6
- eine Ansicht von oben auf ein drittes Bodenbearbeitungswerkzeug nach der Erfindung; und
- Fig. 7
- eine perspektivische Ansicht des Bodenbearbeitungswerkzeuges von
Fig. 6 .
- Fig. 1
- a schematic cross-sectional view through an inventive tillage tool;
- Fig. 2
- a top view of the soil working tool according to
Fig. 1 ; - Fig. 3
- a perspective view of the soil working tool of
Fig. 1 andFig. 2 ; - Fig. 4
- a top view of another inventive tillage tool;
- Fig. 5
- a perspective view of the soil working tool of
Fig. 4 ; - Fig. 6
- a top view of a third tillage tool according to the invention; and
- Fig. 7
- a perspective view of the soil working tool of
Fig. 6 ,
Ein erfindungsgemäßes Bodenbearbeitungswerkzeug 10 nach
Wie insbesondere aus den
Der innere Hohlraum des Absaugkastens 32 des kastenförmigen Mischblattes 30 ist über einen nicht dargestellten Durchbruch in dem Mittenschaft 12 mit einem mittigen Leitungskanal 14 verbunden, welcher in dem rohrförmigen Mittenschaft 12 ausgebildet ist.The inner cavity of the
An einer Oberseite des Mittenschaftes 12 ist eine Anschlusseinrichtung 60 angeordnet, mit welcher der Mittenschaft 12 mit weiteren Gestängerohren mit Leitungsanschluss verbunden werden kann. Zur Drehmomentübertragung über die Gestängerohre ist an der Oberseite des Mittenschaftes 12 axial gerichtetes Keilnutprofil 62 an der Außenseite angebracht. Dieses greift formschlüssig in ein entsprechendes Keilnutprofil an einer Innenseite der aufgesteckten Gestängerohre ein. Auf diese Weise kann ein Drehmoment von einem Drehantrieb eines nicht dargestellten Bohrgerätes auf das Bodenbearbeitungswerkzeug 10 übertragen werden.On an upper side of the
Das von der Abtragseinrichtung 70 abgetragene Bodenmaterial wird in dem mittleren Mischbereich des Bodenbearbeitungswerkzeuges 10 mit zugeführter Flüssigkeit zu einer Suspension vermischt. Die radial vorstehenden Mischblätter 20, 30 dienen dabei nicht nur zum Vermischen, sondern auch zum weiteren Zerkleinern des abgetragenen Bodenmaterials, so dass dieses mit der Flüssigkeit zuverlässig durch die Öffnungen 34 mittels einem, von einer nicht dargestellten Pumpe erzeugten Unterdruck abgesaugt werden kann. Um den Misch- und Zerkleinerungseffekt zu verbessern, sind an den schwertförmigen flachen Mischblättern 20 an den schmalen Frontseiten Schneidplatten 22 aus Hartmetall angeschweißt. Weiterhin ist eine Ausnehmung 24 und eine Auflageplatte 26 an jedem schwertförmigen Mischblatt 20 angeordnet, wobei hierdurch ein verbesserter Verwirbelungs- und damit Mischeffekt erzeugt wird.The soil material removed by the
Zur weiteren Verbesserung des Mischeffektes ist der mittlere Mischbereich an dem Mittenschaft 12 von einer glockenartigen Mischhaube 40 überdeckt, die nur in
Die Kanten der Mischflächen können mit punktförmigen Verschleißelementen versehen sein.The edges of the mixing surfaces can be provided with punctiform wear elements.
Ein weiteres erfindungsgemäßes Bodenbearbeitungswerkzeug 10, welches ebenfalls als ein Bohrwerkzeug ausgebildet ist, ist in den
Ein besonders kompaktes erfindungsgemäßes Bodenbearbeitungswerkzeug 10 ist in den
Alle Varianten des erfindungsgemäßen Bodenbearbeitungswerkzeugs 10 können an einem herkömmlichen Bohrgerät mit einem Unterwagen, einem Oberwagen und einem daran angeordneten Mast mit Bohrantrieb und insbesondere bei Flydrill-Anlagen und Onshore- und Offshore-Bohranlagen eingesetzt werden. Das Bodenbearbeitungswerkzeug wird am unteren Ende eines Bohrgestänges angeschlossen, welches von dem Antrieb drehend angetrieben und axial nach unten und oben verfahren werden kann. Das abgetragene Bodenmaterial wird über eine hier nicht dargestellte Zuführöffnung mit einer Flüssigkeit in dem Mischbereich unter der Mischhaube 40 durch die rotierenden Mischblätter 20, 30 vermengt. Durch die Mischblätter 20, 30 wird das abgetragene Bodenmaterial noch weiter zerkleinert, so dass die so erzeugte Suspension über die Öffnungen 34 in dem kastenförmigen Mischblatt 30 abgesaugt und über den Leitungskanal 14 nach oben aus dem Bohrloch abgeleitet werden kann. Der Außendurchmesser der Mischhaube 40 entspricht im Wesentlichen dem Bohrungsdurchmesser der Bohrung, welche durch die Abtragseinrichtung 70 erzeugt wird.All variants of the
Der kreisringförmige Deckbereich 44 der Mischhaube 40 trennt den Mischbereich von dem darüberliegenden Bohrungsbereich ab. In diesem Bereich kann die Bohrung mit einer Stützflüssigkeit oder eine Stützsuspension verfüllt sein. Durch die Mischhaube wird erreicht, dass eine unerwünschte Vermischung zwischen der Stützflüssigkeit oder der Stützsuspension mit dem abgetragenen Bodenmaterial in den Mischbereich unterhalb der Mischhaube 40 erfolgt.The
Nach Abteufen der Bohrung und Abfördern des so abgetragenen Bodenmaterials kann das Bohrwerkzeug aus dem Bohrloch rückgezogen werden. Die Stützflüssigkeit kann dabei rückgewonnen und gleichzeitig das Bohrloch mit einer aushärtbaren Suspension verfüllt werden. Diese kann zu einem Bohrpfahl im Boden aushärten.After drilling the borehole and discharging the so-removed soil material, the drilling tool can be withdrawn from the borehole. The support liquid can be recovered and at the same time the wellbore be filled with a curable suspension. This can harden to a bored pile in the ground.
Claims (11)
- A ground processing tool having a central shaft (12), built into which is a conducting channel, and having at least one mixing blade (20, 30), which is attached to the central shaft (12) and almost extends radially outward,
wherein at least one mixing blade (30) with an inner cavity is provided,
wherein the cavity communicates with the conducting channel (14) in the central shaft (12),
wherein at the mixing blade (30) is provided at least one opening (34) of the cavity to an outside, and
on a lower side a removal apparatus (70) is arranged for removing ground material,
characterized in that
a ring-shaped circumferential wall (42) is mounted on the central shaft (12) and encircles, in a ring-like manner, a mixing area, in which the at least one mixing blade (20, 30) is arranged, and
a conveying apparatus (80) for conveying the removed ground material is arranged between the removal apparatus (70) and the at least one mixing blade (20, 30) in the mixing area built by the ring-shaped circumferential wall (42). - Ground processing tool according to claim 1,
characterized in that
the circumferential wall (42) features an upper deck area (44), whereby a hood-like mixing bell (40) is formed. - Ground processing tool according to claim 1 or 2
characterized in that
the ring-like circumferential wall (42) is mounted so as to be rotatable with respect to the central shaft (12). - Ground processing tool according to any one of claims 1 to 3,
characterized in that
multiple mixing blades (20, 30) are arranged on the central shaft (12). - Ground processing tool according to any one of claims 1 to 4,
characterized in that
at least one mixing element (30) is attached to an inner side of the ring-like circumferential wall (42). - Ground processing tool according to any one of claims 1 to 5,
characterized in that
a connecting apparatus (60) for a pipe connection with a suction apparatus is provided in an upper area of the central shaft (12). - Ground processing tool according to claim 1,
characterized in that
bar-shaped mixing elements (50) are arranged on the ring-like circumferential wall (42). - A drilling device for earth and rock drilling,
characterized in that
a ground processing tool (10) according to any one of claims 1 to 7 is provided. - Drilling device according to claim 8,
characterized in that
a suction apparatus is provided, with which removed ground material can be suctioned away through the conducting channel (14) in the central shaft (12) via the at least one opening (34) in the mixing blade (30). - Method for creating a borehole in the ground using a ground processing tool (10) according to any of claims 1 to 7,
wherein ground material is removed by the ground processing tool (10) and blended with a liquid in the created borehole to a suspension, which is suctioned away by at least one opening (34) in the at least one mixing blade (30) via the conducting channel (14) into the central shaft (12). - Method according to claim 10,
characterized in that
the suspension is discharged from the borehole.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17155833.1A EP3361040B1 (en) | 2017-02-13 | 2017-02-13 | Soil processing tool and method for creating a hole in the soil |
CA2993084A CA2993084C (en) | 2017-02-13 | 2018-01-26 | A ground processing tool and a method for creating a borehole in the ground |
US15/885,425 US10458184B2 (en) | 2017-02-13 | 2018-01-31 | Ground processing tool and a method for creating a borehole in the ground |
CN201810149406.4A CN108425629B (en) | 2017-02-13 | 2018-02-13 | Surface treating tool and method for forming a borehole in the ground |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17155833.1A EP3361040B1 (en) | 2017-02-13 | 2017-02-13 | Soil processing tool and method for creating a hole in the soil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3361040A1 EP3361040A1 (en) | 2018-08-15 |
EP3361040B1 true EP3361040B1 (en) | 2019-11-27 |
Family
ID=58018005
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EP17155833.1A Active EP3361040B1 (en) | 2017-02-13 | 2017-02-13 | Soil processing tool and method for creating a hole in the soil |
Country Status (4)
Country | Link |
---|---|
US (1) | US10458184B2 (en) |
EP (1) | EP3361040B1 (en) |
CN (1) | CN108425629B (en) |
CA (1) | CA2993084C (en) |
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DE102019120019A1 (en) * | 2019-07-24 | 2021-01-28 | Herrenknecht Ag | Boring head for drilling a hole in the ground |
Citations (2)
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EP1045073A1 (en) * | 1999-04-15 | 2000-10-18 | TREVI S.p.A. | An excavation tool and a method for forming a column of consolidated soil |
EP1600560A1 (en) * | 2004-05-28 | 2005-11-30 | Smet F & C | A method and device for forming a pile |
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US3508622A (en) * | 1968-05-13 | 1970-04-28 | Pengo Corp | Adjustable boring head for earth augers |
JPS60164509A (en) * | 1984-02-02 | 1985-08-27 | Kobe Steel Ltd | Method and apparatus for improving ground by jet stirring of powder |
CN85101802A (en) * | 1985-04-01 | 1987-01-10 | 株式会社神户制钢所 | The method of soil stabilization and apparatus |
US5135058A (en) * | 1990-04-26 | 1992-08-04 | Millgard Environmental Corporation | Crane-mounted drill and method for in-situ treatment of contaminated soil |
KR20010043016A (en) * | 1999-02-25 | 2001-05-25 | 메나르드-솔트레이트먼트 | Concrete comprising an elastic substance and pile made of such a concrete |
US8869919B2 (en) * | 2007-09-06 | 2014-10-28 | Smith International, Inc. | Drag bit with utility blades |
US20100276206A1 (en) * | 2008-07-25 | 2010-11-04 | Anatoli Borissov | Rotary Drill Bit |
EP2487320B1 (en) * | 2011-02-11 | 2013-10-09 | BAUER Maschinen GmbH | Gimlet |
EP2703596B1 (en) * | 2012-08-31 | 2015-02-18 | BAUER Maschinen GmbH | Drilling device and method for producing a borehole |
EP2876246B1 (en) * | 2013-11-21 | 2019-05-01 | BAUER Maschinen GmbH | Auger drive for drilling into soil |
CN105041216B (en) * | 2015-08-19 | 2017-05-03 | 上海中联重科桩工机械有限公司 | Rotary drilling rig capable of being provided with protective cylinder |
-
2017
- 2017-02-13 EP EP17155833.1A patent/EP3361040B1/en active Active
-
2018
- 2018-01-26 CA CA2993084A patent/CA2993084C/en active Active
- 2018-01-31 US US15/885,425 patent/US10458184B2/en active Active
- 2018-02-13 CN CN201810149406.4A patent/CN108425629B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1045073A1 (en) * | 1999-04-15 | 2000-10-18 | TREVI S.p.A. | An excavation tool and a method for forming a column of consolidated soil |
EP1600560A1 (en) * | 2004-05-28 | 2005-11-30 | Smet F & C | A method and device for forming a pile |
Also Published As
Publication number | Publication date |
---|---|
CN108425629A (en) | 2018-08-21 |
CN108425629B (en) | 2021-02-09 |
EP3361040A1 (en) | 2018-08-15 |
CA2993084A1 (en) | 2018-08-13 |
US10458184B2 (en) | 2019-10-29 |
CA2993084C (en) | 2020-03-31 |
US20180230748A1 (en) | 2018-08-16 |
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