EP3336301B1 - Drilling apparatus and method for producing a borehole - Google Patents
Drilling apparatus and method for producing a borehole Download PDFInfo
- Publication number
- EP3336301B1 EP3336301B1 EP16205044.7A EP16205044A EP3336301B1 EP 3336301 B1 EP3336301 B1 EP 3336301B1 EP 16205044 A EP16205044 A EP 16205044A EP 3336301 B1 EP3336301 B1 EP 3336301B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drilling tool
- rotary drilling
- hammer
- base body
- pumping device
- 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
- 238000005553 drilling Methods 0.000 title claims description 94
- 238000004519 manufacturing process Methods 0.000 title claims 2
- 239000000463 material Substances 0.000 claims description 40
- 238000005086 pumping Methods 0.000 claims description 21
- 239000000725 suspension Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 4
- 239000002689 soil Substances 0.000 description 32
- 230000018109 developmental process Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 230000036346 tooth eruption Effects 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
- E21B6/00—Drives for drilling with combined rotary and percussive action
- E21B6/02—Drives for drilling with combined rotary and percussive action the rotation being continuous
- E21B6/04—Separate drives for percussion and rotation
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
-
- 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
- E21B10/02—Core bits
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
-
- 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
- E21B6/00—Drives for drilling with combined rotary and percussive action
Definitions
- the invention relates to a rotary drilling tool for creating a hole in the ground, with a base body, a removal device arranged on an underside of the base body, which has at least one hammer unit which comprises an axially reversibly driven hammer element, and a discharge line for discharging removed soil material and drilling suspension, according to the preamble of claim 1.
- the invention further relates to a method for creating a hole in the ground with a rotary drilling tool, in which soil material is removed with a removal device on an underside of a base body of the rotary drilling tool and removed soil material and drilling suspension are removed by means of a discharge line, the removal device having at least one hammer unit, in which a hammer element is driven axially reversing, according to the preamble of claim 12.
- a generic rotary drilling tool comes from the EP 2 592 214 A1 out.
- several hammer units are provided with axially reversible hammer elements which are driven by compressed air. This creates a striking movement of the hammer elements, which means that hard ground, especially rock, can be removed.
- Used compressed air can escape from a lower area of the hammer units, the compressed air being used to remove removed soil material and drilling suspension in the so-called air-lifting process.
- the released compressed air can flow upwards through discharge lines. Soil material and drilling suspension are removed upwards from the borehole.
- a drilling device which can be arranged within a support pipe and can clamp on the inside of the drill pipe to create the hole.
- a rotary drive, a feed drive, a clamping device for clamping the housing in the support tube and other units for feeding and discharging suspensions are arranged within the drilling device. The soil material is removed using rotating cutting devices.
- Drilling tools with rotating cutting teeth are suitable for working on soils of low or medium strength, particularly stripping soil material.
- the WO 83/00183 teaches a hammer drill with a single drill head located at a lower end of the drilling device.
- the US 4,790,391 A shows another rotary drilling device with an alternative cutting element advance.
- a propulsive force is generated on the cutting element using a pneumatic piston.
- the cutting element is axially displaceable on a guide, for example in the form of a splined shaft profile, which is acted upon by the piston.
- a pumping device is provided on the working surface, which sucks the drilling suspension from the depth of the borehole.
- the invention is based on the object of specifying a rotary drilling tool and a method for creating a hole in the ground, with which particularly good removal performance can be achieved, especially with hard ground material.
- the object is achieved on the one hand by a rotary drilling tool with the features of claim 1 and on the other hand by a method with the features of claim 12.
- Preferred embodiment variants are specified in the respective dependent claims.
- the rotary drilling tool according to the invention is characterized in that a pumping device is arranged on the base body along the discharge line and that the pumping device is designed to pump out the removed soil material with drilling suspension through the discharge line.
- a basic idea of the invention is based on the knowledge that, for good removal performance in hammer units with reversibly driven hammer elements, it is essential that these hammer elements hit the hard ground material as directly as possible. This allows the impact energy to be efficiently converted into selective overloads on the ground material which leads to the existing floor material flaking or breaking off.
- the hammer unit can be driven in any way, for example using electrical energy or using a hydraulic fluid.
- the at least one hammer unit is operated with compressed air, which is supplied via a supply line.
- the compressed air is supplied from outside the borehole by a compressor, which is preferably arranged on the drilling device, through which a rotary movement is also applied to the rotary drilling tool.
- a preferred development of the invention is that an outlet opening for used compressed air is provided at a lower end region of the at least one hammer unit.
- the used compressed air therefore also escapes into the area in which the soil removal takes place.
- the compressed air can flow upwards in the borehole filled with drilling suspension to remove removed soil material. According to the air-lifting process, the compressed air flowing upwards carries with it a certain amount of removed soil material and drilling suspension. This allows the flow generated by the pump device to be supported.
- any suitable pump can be used as the pump device, in particular a screw pump.
- One or more pumps can be provided.
- a further preferred embodiment of the invention is that the hammer element has a vertically aligned piston, which is slidably mounted in a cylinder housing of the hammer unit.
- the rotary drilling tool can have several hammer units which are designed in the same way.
- the hammer units can in particular be designed in modular form from the cylinder housing with the piston mounted therein. The supply and discharge of compressed air is controlled in such a way that the piston moves up and down at a desired frequency.
- the hammer units are arranged in a substantially cylindrical housing of the rotary drilling tool.
- the pump device is arranged in a housing above the removal device.
- the housing can extend a cylindrical base body with the removal device upwards.
- the pump device is preferably arranged centrally within the upper part of the housing.
- Energy for operating the pumping device can be supplied from outside the borehole via an energy supply line, in particular an electrical line or a pressurized fluid line.
- a so-called rotary feedthrough or a rotary contact with an annular contact strip can be provided in a generally known manner, so that energy can be transferred to the rotating drilling tool from a fixed energy supply from the outside.
- a connecting device for a drill pipe is arranged on an upper side of the housing.
- the connecting device can in particular be a so-called Kelly box for connecting a Kelly drill pipe.
- Other mechanical connecting devices for non-rotatably connecting the rotary drilling tool to a drill pipe can also be used.
- a particularly efficient suction of removed soil material is achieved in that the pumping device is arranged on a central section of the discharge line and that the discharge line is divided into several discharge lines below the central section.
- the pumping device is therefore arranged centrally on an approximately central section of the discharge line, whereby the suction power of the pump can be divided into several discharge lines below the central section.
- At least one suction opening for sucking off the removed soil material is arranged on an underside of the base body.
- Each suction opening is connected to a discharge sub-line, which leads to the central section with the pump device.
- the processed soil material can be particularly reliably extracted over the entire drilling section and removed upwards via several suction openings.
- a possible embodiment of the rotary drilling tool according to the invention is that the rotary drilling tool is designed as a full-cut drilling tool.
- the downward-facing end face of the rotary drilling tool is essentially plate-shaped, with several hammer elements protruding to remove the existing soil. When the rotary drilling tool is rotated at the same time, particularly large areas of soil can be worked.
- the rotary drilling tool is designed as a core drilling tool.
- the hammer units are located as a removal device along an annular edge region of the base body.
- a free receiving space remains in the middle to accommodate a core that forms during drilling.
- the drill core can break off on its own after a certain length due to the transverse forces that occur during drilling.
- an active device for breaking or processing the drill core can also be provided.
- the core can be removed from the borehole using the rotary drilling tool or a separate core catcher.
- an energy supply line is provided with which the pump device on the base body is supplied with energy, in particular electrical or hydraulic energy.
- energy in particular electrical or hydraulic energy.
- the pumping device can be operated particularly reliably.
- the pump performance can also be easily adjusted possible depending on your needs.
- the pumping device can also be done by tapping torque from the drill pipe.
- the method according to the invention is characterized in that a pump device is arranged on a base body of the rotary drilling tool along the discharge line, with which the removed soil material with drilling suspension is pumped out through the discharge line to the outside of a borehole.
- the method according to the invention is preferably carried out with the rotary drilling tool according to the invention, as described above.
- the advantages described above can be achieved, particularly with regard to a high removal rate.
- a preferred variant of the method according to the invention is that the hammer unit is operated with compressed air, which exits from an underside of the base body.
- the escaping compressed air can support the removal of removed soil material with drilling suspension upwards into the discharge line.
- particularly reliable suction is achieved in that the removed soil material and the drilling suspension are sucked out via several suction openings and several suction lines, which open into a central section on which the pumping device is arranged.
- the pump's suction power is distributed over several partial suction lines and several drainage openings. This promotes reliable and quick removal of the removed soil material.
- a first rotary drilling tool 10 is described below in connection with Figures 1 to 3 explained.
- the rotary drilling tool 10 is designed as a core drilling tool with an annular arrangement of the removal device 20 around a central hollow core receptacle 16.
- the removal device 20 has six identically designed hammer units 22 with a circular disk-shaped hammer element 24.
- removal elements (not shown) are arranged, which are preferably tapered hard metal elements.
- Suction openings 38 are arranged between the individual hammer units 22 for suctioning off the removed soil material with the surrounding drilling suspension.
- the suction openings 38 are set obliquely in one direction of rotation in order to achieve the best possible material absorption.
- the rotary drilling tool 10 has a cylindrical housing 14, at the upper end of which a connecting device 50 for a drill pipe is attached.
- the connecting device 50 is preferably designed as a so-called Kelly box for receiving a square of a drill pipe.
- the individual hammer units 22 have an elongated cylindrical cylinder housing 28, in which a piston 26 is mounted so that it can be moved reversibly between a lower impact position and an upper retraction position.
- the disk-shaped hammer element 24 is attached.
- the hammer units 22 are supplied with compressed air via a supply line 29.
- the transverse line 27 is formed between two cover plates. At a lower end region of the hammer units 22, used compressed air can exit on the underside of the base body 12 of the rotary drilling tool 10.
- Removed soil material and surrounding drilling suspension as well as escaping compressed air are removed via the obliquely directed suction openings 38 via the individual partial discharge lines 34.
- the partial discharge lines 34 are connected via transverse channels 35 to a central section 32 of an upwardly guided discharge line 30.
- a pump device 40 arranged centrally in the housing 14 is positioned on the central section 32.
- the pump device 40 is supplied with drive energy, in particular electrical energy, from a carrier device outside the borehole via an energy supply line 44. From the central section 32, the sucked-in soil material is conveyed upwards via the discharge line 30 via the pump device 40.
- the pump device 40 is firmly connected to the base body 12 of the rotary drilling tool 10 via a pump housing 42 and the central section 32.
- a second rotary drilling tool 10 which is designed as a full-cut drilling tool.
- the rotary drilling tool 10 has a cylindrical housing 14, at the lower end of which a removal device 20 is arranged, which extends essentially transversely over a circular disk-shaped base plate 18.
- the removal device 20 is formed from a plurality of hammer units 22 with circular disk-shaped hammer elements 24.
- two radially extending slot-shaped suction openings 38 for suctioning off removed soil material and surrounding soil suspension are arranged on the base plate 18.
- a Kelly box is attached as a connecting device 50 for a drill pipe.
- the rod-shaped hammer units 22 with their respective cylinder housings 28 are arranged within the cylindrical housing 14, which represents an essential part of the base body 12 in this rotary drilling tool 10.
- pistons 26 driven by compressed air are mounted in an axially reversible manner in order to exert an impact movement on the existing face.
- disk-shaped hammer elements 24 with removal elements are attached.
- the pump device 40 has two separate pumps 41, each pump 41 being connected to a suction opening 38 via its own discharge line 30.
- an upwardly extending supply line 29 is provided, which opens in its lower region into a central pipe section 25, which is formed below the connecting device 50. Compressed air supplied is forwarded from the pipe section 25 to the individual hammer units 22 via a transverse line 27 formed in a cover plate 17.
- the rotary drilling tool 10 is driven in rotation via a drill pipe (not shown), so that the removal device 20 with the hammer units 22 sweeps over the entire working face.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Description
Die Erfindung betrifft ein Drehbohrwerkzeug zum Erstellen einer Bohrung im Boden, mit einem Grundkörper, einer an einer Unterseite des Grundkörper angeordneten Abtragseinrichtung, welche mindestens eine Hammereinheit aufweist, welche ein axial reversierend angetriebenes Hammerelement umfasst, und eine AbfÌhrleitung zum AbfÌhren von abgetragenem Bodenmaterial und Bohrsuspension, gemÀà dem Oberbegriff des Anspruchs 1.The invention relates to a rotary drilling tool for creating a hole in the ground, with a base body, a removal device arranged on an underside of the base body, which has at least one hammer unit which comprises an axially reversibly driven hammer element, and a discharge line for discharging removed soil material and drilling suspension, according to the preamble of claim 1.
Die Erfindung betrifft weiterhin ein Verfahren zum Erstellen einer Bohrung im Boden mit einem Drehbohrwerkzeug, bei dem mit einer Abtragseinrichtung an einer Unterseite eines Grundkörpers des Drehbohrwerkzeugs Bodenmaterial abgetragen wird und mittels einer AbfÌhrleitung abgetragenes Bodenmaterial und Bohrsuspension abgefÌhrt werden, wobei die Abtragseinrichtung mindestens eine Hammereinheit aufweist, bei welcher ein Hammerelement axial reversierend angetrieben wird, gemÀà dem Oberbegriff des Anspruchs 12.The invention further relates to a method for creating a hole in the ground with a rotary drilling tool, in which soil material is removed with a removal device on an underside of a base body of the rotary drilling tool and removed soil material and drilling suspension are removed by means of a discharge line, the removal device having at least one hammer unit, in which a hammer element is driven axially reversing, according to the preamble of
Ein gattungsgemÀÃes Drehbohrwerkzeug geht aus der
Aus der
Bohrwerkzeuge mit rotierenden SchneidzÀhnen sind zum Bearbeiten von Böden mit geringer oder mittlerer Festigkeit geeignet, wobei Bodenmaterial insbesondere abgeschÀlt wird. Zum Bearbeiten von Böden hoher Festigkeit, insbesondere von anstehenden Gestein und Felsen ist ein Bearbeiten durch RollenmeiÃel oder aktiv angetriebener Hammereinheiten notwendig. Diese ÃŒben auf hartem spröden Material eine punktuelle hohe Druckbelastung aus, welche zu einem Abplatzen und damit einem Abtragen von Bodenmaterial fÃŒhrt.Drilling tools with rotating cutting teeth are suitable for working on soils of low or medium strength, particularly stripping soil material. To work on high-strength soils, especially on rocks and rocks, it is necessary to work with roller chisels or actively driven hammer units. These exert a high point pressure load on hard, brittle material, which leads to spalling and thus removal of soil material.
Aus der
Die
Die
Der Erfindung liegt die Aufgabe zugrunde, ein Drehbohrwerkzeug und ein Verfahren zum Erstellen einer Bohrung im Boden anzugeben, mit welchem insbesondere bei einem harten Bodenmaterial eine besonders gute Abtragsleistung erzielbar ist.The invention is based on the object of specifying a rotary drilling tool and a method for creating a hole in the ground, with which particularly good removal performance can be achieved, especially with hard ground material.
Die Aufgabe wird nach der Erfindung zum einen durch ein Drehbohrwerkzeug mit den Merkmalen des Anspruchs 1 und zum anderen durch ein Verfahren mit den Merkmalen des Anspruchs 12 gelöst. Bevorzugte AusfÌhrungsvarianten sind in den jeweils abhÀngigen AnsprÌchen angegeben.According to the invention, the object is achieved on the one hand by a rotary drilling tool with the features of claim 1 and on the other hand by a method with the features of
Das erfindungsgemÀÃe Drehbohrwerkzeug ist dadurch gekennzeichnet, dass an dem Grundkörper entlang der AbfÃŒhrleitung eine Pumpeinrichtung angeordnet ist und dass die Pumpeinrichtung zum Abpumpen des abgetragenen Bodenmaterials mit Bohrsuspension durch die AbfÃŒhrleitung ausgebildet ist.The rotary drilling tool according to the invention is characterized in that a pumping device is arranged on the base body along the discharge line and that the pumping device is designed to pump out the removed soil material with drilling suspension through the discharge line.
Ein Grundgedanke der Erfindung beruht auf der Erkenntnis, dass es fÃŒr eine gute Abtragsleistung bei Hammereinheiten mit reversierend angetriebenen Hammerelementen von einer wesentlichen Bedeutung ist, dass diese Hammerelemente möglichst unmittelbar auf das anstehende harte Bodenmaterial treffen. Hierdurch kann die Schlagenergie effizient in punktuelle Ãberlastungen des Bodenmaterials umgesetzt werden, was zu einem Abplatzen oder Absprengen des anstehenden Bodenmaterials fÃŒhrt.A basic idea of the invention is based on the knowledge that, for good removal performance in hammer units with reversibly driven hammer elements, it is essential that these hammer elements hit the hard ground material as directly as possible. This allows the impact energy to be efficiently converted into selective overloads on the ground material which leads to the existing floor material flaking or breaking off.
Durch den Einsatz einer Pumpeinrichtung unmittelbar an der AbfÌhrleitung an dem Drehbohrwerkzeug selbst wird erreicht, dass besonders zuverlÀssig und schnell abgetragenes Bodenmaterial mit Bohrsuspension von der Ortsbrust abgefÌhrt wird. Damit wird erreicht, dass beim Auftreffen der Hammerelemente auf den anstehenden Boden die Schlagenergie nicht durch noch nicht abgefÌhrtes abgetragenes Bodenmaterial abgemildert und abgedÀmpft wird. Ein unmittelbares und schnelles AbfÌhren des abgetragenen Bodenmaterials durch eine Pumpeinrichtung in dem Drehbohrwerkzeug selbst wird somit erreicht, dass ein möglichst hoher Anteil der Schlagenergie in den anstehenden Boden aufgebracht wird. Hierdurch wird eine hohe Abtragsleistung erzielt.By using a pump device directly on the discharge line on the rotary drilling tool itself, it is achieved that soil material removed with drilling suspension is removed from the face particularly reliably and quickly. This ensures that when the hammer elements hit the ground, the impact energy is not mitigated and dampened by ground material that has not yet been dissipated. An immediate and rapid removal of the removed soil material by a pump device in the rotary drilling tool itself is achieved by applying as high a proportion of the impact energy as possible to the existing soil. This achieves a high removal rate.
GrundsÀtzlich kann die Hammereinheit in jeder beliebigen Weise angetrieben werden, etwa mittels elektrischer Energie oder mittels eines Hydraulikfluids. Besonders vorteilshaft ist es nach einer AusfÃŒhrungsform der Erfindung, dass die mindestens eine Hammereinheit mit Druckluft betrieben ist, welche ÃŒber eine ZufÃŒhrleitung zugefÃŒhrt ist. Die Druckluft wird von auÃerhalb des Bohrlochs von einem Kompressor zugeleitet, welcher vorzugsweise an dem BohrgerÀt angeordnet ist, durch welches auch eine Drehbewegung auf das Drehbohrwerkzeug aufgebracht wird.In principle, the hammer unit can be driven in any way, for example using electrical energy or using a hydraulic fluid. According to one embodiment of the invention, it is particularly advantageous that the at least one hammer unit is operated with compressed air, which is supplied via a supply line. The compressed air is supplied from outside the borehole by a compressor, which is preferably arranged on the drilling device, through which a rotary movement is also applied to the rotary drilling tool.
Eine bevorzugte Weiterbildung der Erfindung besteht darin, dass an einem unteren Endbereich der mindestens einen Hammereinheit eine Austrittsöffnung fÃŒr verbrauchte Druckluft vorgesehen ist. Die verbrauchte Druckluft tritt somit ebenfalls in den Bereich aus, in welchem der Bodenabtrag stattfindet. Die Druckluft kann dabei in dem mit Bohrsuspension gefÃŒllten Bohrloch zum AbfÃŒhren von abgetragenem Bodenmaterial nach oben strömen. Entsprechend dem Luft-Hebe-Verfahren reiÃt die nach oben strömende Druckluft in gewissem Umfang abgetragenes Bodenmaterial und Bohrsuspension mit sich. Hierdurch kann die Strömung, welche von der Pumpeinrichtung erzeugt wird, unterstÃŒtzt werden. Als Pumpeinrichtung kann grundsÀtzlich jede geeignete Pumpe eingesetzt werden, insbesondere eine Schneckenpumpe. Es können eine oder mehrere Pumpen vorgesehen sein.A preferred development of the invention is that an outlet opening for used compressed air is provided at a lower end region of the at least one hammer unit. The used compressed air therefore also escapes into the area in which the soil removal takes place. The compressed air can flow upwards in the borehole filled with drilling suspension to remove removed soil material. According to the air-lifting process, the compressed air flowing upwards carries with it a certain amount of removed soil material and drilling suspension. This allows the flow generated by the pump device to be supported. In principle, any suitable pump can be used as the pump device, in particular a screw pump. One or more pumps can be provided.
Eine weitere bevorzugte AusfÌhrungsform der Erfindung besteht darin, dass das Hammerelement einen vertikal ausgerichteten Kolben aufweist, welcher in einem ZylindergehÀuse der Hammereinheit verschiebbar gelagert ist. Das Drehbohrwerkzeug kann dabei mehrere Hammereinheiten aufweisen, welche gleich ausgebildet sind. Die Hammereinheiten können insbesondere modulartig aus dem ZylindergehÀuse mit dem darin gelagerten Kolben ausgebildet sein. Dabei wird die ZufÌhrung und AbfÌhrung von Druckluft so gesteuert, dass eine Auf- und Ab-Bewegung des Kolbens mit einer gewÌnschten Frequenz erreicht wird.A further preferred embodiment of the invention is that the hammer element has a vertically aligned piston, which is slidably mounted in a cylinder housing of the hammer unit. The rotary drilling tool can have several hammer units which are designed in the same way. The hammer units can in particular be designed in modular form from the cylinder housing with the piston mounted therein. The supply and discharge of compressed air is controlled in such a way that the piston moves up and down at a desired frequency.
Die Hammereinheiten sind dabei in einem im Wesentlichen zylindrischen GehÀuse des Drehbohrwerkzeuges angeordnet. Eine bevorzugte AusfÃŒhrungsvariante der Erfindung kann darin gesehen werden, dass die Pumpeinrichtung oberhalb der Abtragseinrichtung in einem GehÀuse angeordnet ist. Das GehÀuse kann dabei einen zylindrischen Grundkörper mit der Abtragseinrichtung nach oben verlÀngern. Innerhalb des oberen Teils in dem GehÀuse ist die Pumpeinrichtung vorzugsweise mittig angeordnet. Von auÃerhalb des Bohrlochs kann ÃŒber eine Energiezufuhrleitung, insbesondere eine elektrische Leitung oder eine Druckfluidleitung, Energie zum Betrieb der Pumpeinrichtung von auÃerhalb des Bohrlochs zugefÃŒhrt werden.The hammer units are arranged in a substantially cylindrical housing of the rotary drilling tool. A preferred embodiment variant of the invention can be seen in that the pump device is arranged in a housing above the removal device. The housing can extend a cylindrical base body with the removal device upwards. The pump device is preferably arranged centrally within the upper part of the housing. Energy for operating the pumping device can be supplied from outside the borehole via an energy supply line, in particular an electrical line or a pressurized fluid line.
Bei einem drehenden Bohrwerkzeug kann in grundsÀtzlich bekannter Weise eine sogenannte DrehdurchfÃŒhrung oder ein Drehkontakt mit einer ringförmigen Kontaktleiste vorgesehen sein, so dass von einer feststehenden EnergiezufÃŒhrung von auÃen Energie auf das drehende Bohrwerkzeug ÃŒbertragen werden kann.In the case of a rotating drilling tool, a so-called rotary feedthrough or a rotary contact with an annular contact strip can be provided in a generally known manner, so that energy can be transferred to the rotating drilling tool from a fixed energy supply from the outside.
Nach einer Weiterbildung der Erfindung ist es vorteilhaft, dass an einer Oberseite des GehÀuses eine Verbindungseinrichtung fÃŒr ein BohrgestÀnge angeordnet ist. Die Verbindungseinrichtung kann insbesondere eine sogenannte Kellybox zum AnschlieÃen eines Kelly-BohrgestÀnges sein. Auch andere mechanische Verbindungseinrichtungen zum drehfesten Verbinden des Drehbohrwerkzeuges mit einem BohrgestÀnge können verwendet werden.According to a further development of the invention, it is advantageous that a connecting device for a drill pipe is arranged on an upper side of the housing. The connecting device can in particular be a so-called Kelly box for connecting a Kelly drill pipe. Other mechanical connecting devices for non-rotatably connecting the rotary drilling tool to a drill pipe can also be used.
Eine besonders effiziente Absaugung von abgetragenem Bodenmaterial wird nach einer Weiterbildung der Erfindung dadurch erzielt, dass die Pumpeinrichtung an einem Zentralabschnitt der AbfÃŒhrleitung angeordnet ist und dass sich unterhalb des Zentralabschnitts die AbfÃŒhrleitung in mehrere AbfÃŒhrleitungen aufteilt. Die Pumpeinrichtung ist somit zentral an einem etwa mittigen Abschnitt der AbfÃŒhrleitung angeordnet, wobei sich die Saugleistung der Pumpe auf mehrere AbfÃŒhrleitungen unterhalb des Zentralabschnitts aufteilen kann.According to a further development of the invention, a particularly efficient suction of removed soil material is achieved in that the pumping device is arranged on a central section of the discharge line and that the discharge line is divided into several discharge lines below the central section. The pumping device is therefore arranged centrally on an approximately central section of the discharge line, whereby the suction power of the pump can be divided into several discharge lines below the central section.
Besonders vorteilhaft ist es dabei, dass an einer Unterseite des Grundkörpers mindestens eine Ansaugöffnung zum Absaugen des abgetragenen Bodenmaterials angeordnet ist. Dabei ist jede Absaugöffnung mit einer AbfÃŒhrteilleitung verbunden, welche zu dem Zentralabschnitt mit der Pumpeinrichtung fÃŒhrt. Ãber mehrere Absaugöffnungen kann das abgearbeitete Bodenmaterial besonders zuverlÀssig ÃŒber den gesamten Bohrabschnitt abgesaugt und nach oben abgefÃŒhrt werden.It is particularly advantageous that at least one suction opening for sucking off the removed soil material is arranged on an underside of the base body. Each suction opening is connected to a discharge sub-line, which leads to the central section with the pump device. The processed soil material can be particularly reliably extracted over the entire drilling section and removed upwards via several suction openings.
Eine mögliche AusfÃŒhrungsform des erfindungsgemÀÃen Drehbohrwerkzeugs besteht darin, dass das Drehbohrwerkzeug als ein Vollschnitt-Bohrwerkzeug ausgebildet ist. Dabei ist die nach unten gerichtete Stirnseite des Drehbohrwerkzeugs im Wesentlichen plattenförmig, wobei mehrere Hammerelemente zum Abtragen des anstehenden Boden vorstehen. Bei einem gleichzeitigen Drehen des Drehbohrwerzeugs kann so eine besonders groÃflÀchige Bodenbearbeitung stattfinden.A possible embodiment of the rotary drilling tool according to the invention is that the rotary drilling tool is designed as a full-cut drilling tool. The downward-facing end face of the rotary drilling tool is essentially plate-shaped, with several hammer elements protruding to remove the existing soil. When the rotary drilling tool is rotated at the same time, particularly large areas of soil can be worked.
Alternativ kann es nach einer Weiterbildung der Erfindung vorgesehen sein, dass das Drehbohrwerkzeug als ein Kernbohrwerkzeug ausgebildet ist. Dabei befinden sich die Hammereinheiten als Abtragseinrichtung entlang eines ringförmigen Randbereichs des Grundkörpers. In der Mitte verbleibt ein freier Aufnahmeraum zur Aufnahme eines sich beim Bohren bildenden Bohrkerns. Ãblicherweise kann der Bohrkern aufgrund der beim Bohren auftretenden QuerkrÀfte ab einer bestimmten LÀnge von sich aus abbrechen. Vorzugsweise kann auch eine aktive Einrichtung zum Brechen oder Abarbeiten des Bohrkerns vorgesehen sein. Der Bohrkern kann mit dem Drehbohrwerkzeug oder einem separaten KernfÀnger aus dem Bohrloch abgefÃŒhrt werden.Alternatively, according to a further development of the invention, it can be provided that the rotary drilling tool is designed as a core drilling tool. The hammer units are located as a removal device along an annular edge region of the base body. A free receiving space remains in the middle to accommodate a core that forms during drilling. Usually, the drill core can break off on its own after a certain length due to the transverse forces that occur during drilling. Preferably, an active device for breaking or processing the drill core can also be provided. The core can be removed from the borehole using the rotary drilling tool or a separate core catcher.
Weiterhin ist es nach einer AusfÌhrungsvariante der Erfindung vorteilhaft, dass eine Energiezufuhrleitung vorgesehen ist, mit welcher die Pumpeinrichtung an dem Grundkörper mit Energie, insbesondere elektrischer oder hydraulischer Energie, versorgt ist. Mit dieser EnergiezufÌhrung kann die Pumpeinrichtung besonders zuverlÀssig betrieben werden. Auch ist ohne Weiteres eine Einstellung der Pumpenleistung je nach Bedarf möglich. Alternativ kann die Pumpeinrichtung auch durch Abgreifen von Drehmoment von dem BohrgestÀnge erfolgen.Furthermore, according to an embodiment variant of the invention, it is advantageous that an energy supply line is provided with which the pump device on the base body is supplied with energy, in particular electrical or hydraulic energy. With this energy supply, the pumping device can be operated particularly reliably. The pump performance can also be easily adjusted possible depending on your needs. Alternatively, the pumping device can also be done by tapping torque from the drill pipe.
Das erfindungsgemÀÃe Verfahren ist dadurch gekennzeichnet, dass an einem Grundkörper des Drehbohrwerkzeugs entlang der AbfÃŒhrleitung eine Pumpeinrichtung angeordnet ist, mit welcher das abgetragene Bodenmaterial mit Bohrsuspension durch die AbfÃŒhrleitung nach auÃerhalb eines Bohrlochs abgepumpt wird.The method according to the invention is characterized in that a pump device is arranged on a base body of the rotary drilling tool along the discharge line, with which the removed soil material with drilling suspension is pumped out through the discharge line to the outside of a borehole.
Das erfindungsgemÀÃe Verfahren wird vorzugsweise mit dem erfindungsgemÀÃen Drehbohrwerkzeug ausgefÃŒhrt, wie es vorausgehend beschrieben wurde. Mit dem erfindungsgemÀÃen Verfahren können die zuvor beschriebenen Vorteile insbesondere hinsichtlich einer hohen Abtragsleistung erzielt werden.The method according to the invention is preferably carried out with the rotary drilling tool according to the invention, as described above. With the method according to the invention, the advantages described above can be achieved, particularly with regard to a high removal rate.
Eine bevorzugte Variante des erfindungsgemÀÃen Verfahrens besteht darin, dass die Hammereinheit mit Druckluft betrieben wird, welche an einer Unterseite des Grundkörpers austritt. Die austretende Druckluft kann ein Abfördern von abgetragenem Bodenmaterial mit Bohrsuspension nach oben in die AbfÃŒhrleitung unterstÃŒtzen.A preferred variant of the method according to the invention is that the hammer unit is operated with compressed air, which exits from an underside of the base body. The escaping compressed air can support the removal of removed soil material with drilling suspension upwards into the discharge line.
Ein besonders zuverlÀssiges Absaugen wird nach einer weiteren Verfahrensvariante der Erfindung dadurch erzielt, dass das abgetragene Bodenmaterial und die Bohrsuspension Ìber mehrere Absaugöffnungen und mehrere Absaugleitungen abgesaugt werden, welche in einen Zentralabschnitt mÌnden, an welchem die Pumpeinrichtung angeordnet ist. Die Absaugleistung der Pumpe wird so auf mehrere Teilabsaugleitungen und mehrere Absauföffnungen verteilt. Dies fördert ein zuverlÀssiges und schnelles AbfÌhren des abgetragenen Bodenmaterials.According to a further method variant of the invention, particularly reliable suction is achieved in that the removed soil material and the drilling suspension are sucked out via several suction openings and several suction lines, which open into a central section on which the pumping device is arranged. The pump's suction power is distributed over several partial suction lines and several drainage openings. This promotes reliable and quick removal of the removed soil material.
Die Erfindung wird nachfolgend anhand von bevorzugten AusfÃŒhrungsbeispielen weiter beschrieben, welche schematisch in den Zeichnungen dargestellt sind. In den Zeichnungen zeigen:
- Fig. 1
- eine perspektivische Ansicht eines ersten erfindungsgemÀÃen Drehbohrwerkzeugs;
- Fig. 2
- eine perspektivische Ansicht des Drehbohrwerkzeugs von
Fig. 1 ohne GehÀuse; - Fig. 3
- eine Schnittsansicht des Drehbohrwerkzeugs von
Fig. 1 in einem LÀngsschnitt; - Fig. 4
- eine perspektivische Ansicht eines zweiten erfindungsgemÀÃen Drehbohrwerkzeugs;
- Fig. 5
- eine perspektivische Ansicht eines Drehbohrwerkzeugs von
Fig. 4 ohne GehÀuse; - Fig. 6
- eine Schnittsansicht des Drehbohrwerkzeugs von
Fig. 4 in einem LÀngsschnitt; und - Fig. 7
- eine Schnittsansicht des Drehbohrwerkzeugs von
Fig. 4 in einem Querschnitt quer zur LÀngsachse.
- Fig. 1
- a perspective view of a first rotary drilling tool according to the invention;
- Fig. 2
- a perspective view of the rotary drilling tool from
Fig. 1 without housing; - Fig. 3
- a sectional view of the rotary drilling tool from
Fig. 1 in a longitudinal section; - Fig. 4
- a perspective view of a second rotary drilling tool according to the invention;
- Fig. 5
- a perspective view of a rotary drilling tool from
Fig. 4 without housing; - Fig. 6
- a sectional view of the rotary drilling tool from
Fig. 4 in a longitudinal section; and - Fig. 7
- a sectional view of the rotary drilling tool from
Fig. 4 in a cross section transverse to the longitudinal axis.
Ein erstes erfindungsgemÀÃes Drehbohrwerkzeug 10 wird nachfolgend im Zusammenhang mit den
Das Drehbohrwerkzeug 10 weist ein zylindrisches GehÀuse 14 auf, an dessen oberen Ende eine Verbindungseinrichtung 50 fÌr ein BohrgestÀnge angebracht ist. Die Verbindungseinrichtung 50 ist vorzugsweise als eine sogenannte Kellybox zur Aufnahme eines Vierkants eines BohrgestÀnges ausgebildet.The
Wie anschaulich in
Die Hammereinheiten 22 werden ÃŒber eine ZufÃŒhrleitung 29 mit Druckluft versorgt. Die vertikal nach oben auÃerhalb des Bohrlochs verlaufende ZufÃŒhrleitung 29 mÃŒndet an ihrem unteren Ende in eine Querleitung 27, welche zu den einzelnen Hammereinheiten 22 fÃŒhrt. Die Querleitung 27 ist zwischen zwei Deckplatten ausgebildet. An einem unteren Endbereich der Hammereinheiten 22 kann verbrauchte Druckluft an der Unterseite des Grundkörpers 12 des Drehbohrwerkzeuges 10 austreten.The
Abgetragenes Bodenmaterial und umgebende Bohrsuspension sowie austretende Druckluft werden ÃŒber die schrÀg gerichteten Absaugöffnungen 38 ÃŒber die einzelnen TeilabfÃŒhrleitungen 34 abgefÃŒhrt. Dabei sind die TeilabfÃŒhrleitungen 34 ÃŒber QuerkanÀle 35 mit einem Zentralabschnitt 32 einer nach oben gefÃŒhrten AbfÃŒhrleitung 30 verbunden. An dem Zentralabschnitt 32 ist eine im GehÀuse 14 mittig angeordnete Pumpeinrichtung 40 positioniert. Die Pumpeinrichtung 40 wird ÃŒber eine EnergiezufÃŒhrleitung 44 mit Antriebsenergie, insbesondere elektrischer Energie, von einem TrÀgergerÀt auÃerhalb des Bohrlochs versorgt. Von dem Zentralabschnitt 32 wird das angesaugte Bodenmaterial ÃŒber die Pumpeinrichtung 40 nach oben ÃŒber die AbfÃŒhrleitung 30 abgefördert. Die Pumpeinrichtung 40 ist ÃŒber ein PumpgehÀuse 42 und den Zentralabschnitt 32 fest mit dem Grundkörper 12 des Drehbohrwerkzeugs 10 verbunden.Removed soil material and surrounding drilling suspension as well as escaping compressed air are removed via the obliquely directed
In den
Innerhalb des zylindrischen GehÀuses 14, welches bei diesem Drehbohrwerkzeug 10 einen wesentlichen Teil des Grundkörpers 12 darstellt, sind die stangenförmigen Hammereinheiten 22 mit ihren jeweiligen ZylindergehÀusen 28 angeordnet. Innerhalb der ZylindergehÀuse 28 sind Ìber Druckluft angetriebene Kolben 26 zum AusÌben einer Schlagbewegung auf die anstehende Ortsbrust axial reversierend gelagert. An den unteren Enden der Kolben 26 sind scheibenförmige Hammerelemente 24 mit nicht dargestellten Abtragselementen angebracht.The rod-shaped
Abgetragenes Bodenmaterial wird Ìber die beiden lÀnglichen Absaugöffnungen 38 abgesaugt. Dabei weist im vorliegenden AusfÌhrungsbeispiel die Pumpeinrichtung 40 zwei getrennte Pumpen 41 auf, wobei jede Pumpe 41 Ìber eine eigene AbfÌhrleitung 30 mit einer Absaugöffnung 38 leitungsverbunden ist.Removed soil material is sucked out via the two
Zur ZufÃŒhrung von Druckluft zu den Hammereinheiten 22 ist eine nach oben verlaufende ZufÃŒhrleitung 29 vorgesehen, welche in ihrem unteren Bereich in einen mittigen Rohrabschnitt 25 mÃŒndet, welcher unterhalb der Verbindungseinrichtung 50 ausgebildet ist. Zugeleitete Druckluft wird von dem Rohrabschnitt 25 ÃŒber eine in einer Deckplatte 17 ausgebildeten Querleitung 27 zu den einzelnen Hammereinheiten 22 weitergeleitet.To supply compressed air to the
Im Betrieb wird das Drehbohrwerkzeug 10 Ìber ein nicht dargestelltes BohrgestÀnge drehend angetrieben, so dass die Abtragseinrichtung 20 mit den Hammereinheiten 22 die gesamte anstehende Ortsbrust Ìberstreicht.During operation, the
Claims (14)
- Rotary drilling tool for producing a bore in the ground, having- a base body (12) and- a discharge line (30) for discharging removed ground material and drilling suspension,- wherein a pumping device (40) is provided and- wherein a pumping device (40) is configured for pumping off the removed ground material with drilling suspension through the discharge line (30),characterized in that- the pumping device (40) is arranged on the base body (12) along the discharge line (30),- in that there is provided a removal device (20) arranged on an underside of the base body (12), which removal device comprises a plurality of hammer units (22) which each comprise a hammer element (24) driven in axially reversing manner,- in that the hammer elements (24) each comprise a vertically oriented piston which is in each case displaceably mounted in a cylinder housing (28) of the hammer unit (22), and- in that on the underside of base body (12) is arranged a plurality of extraction openings (38) for extracting of the removed ground material.
- Rotary drilling tool according to claim 1,
characterized in that
the at least one hammer unit (22) is operated with compressed air which is supplied via a supply line (29). - Rotary drilling tool according to claim 2,
characterized in that
an outlet opening for used compressed air is provided at a lower end region of the at least one hammer unit (22). - Rotary drilling tool according to any one of claims 1 to 3,
characterized in that
the pumping device (40) is arranged above the removal device in a housing (14). - Rotary drilling tool according to claim 4,
characterized in that
a connecting device (50) for a drill string is arranged on an upper side of the housing (14). - Rotary drilling tool according to any one of claims 1 to 5,
characterized in thatthe pumping device (40) is arranged on a central portion (32) of the discharge line (30), andin that beneath the central portion (32) the discharge line (30) divides into a plurality of discharge sub-lines (34). - Rotary drilling tool according to claim 6,
characterized in that
each extraction opening (38) is connected to a discharge sub-line (34) which leads to the central portion (32) with the pumping device (40). - Rotary drilling tool according to any one of claims 1 to 7,
characterized in that
the rotary drilling tool (10) is in the form of a full-face drilling tool. - Rotary drilling tool according to any one of claims 1 to 8,
characterized in that
the rotary drilling tool (10) is in the form of a core drilling tool. - Rotary drilling tool according to any one of claims 1 to 9,
characterized in that
an energy supply line (44) is provided, by means of which the pumping device (40) on the base body (12) is supplied with energy. - Rotary drilling tool according to claim 10,
characterized in that
the energy is electrical or hydraulic energy. - Method for producing a bore in the ground by means of a rotary drilling tool (10), in particular, according to any one of claims 1 to 11, in which:- ground material is removed by means of a removal device (20) on an underside of a base body (12) of the rotary drilling tool (10), and- removed ground material and drilling suspension are discharged by means of a discharge line (30),- wherein a pumping device (40) is, by means of which pumping device the removed ground material with drilling suspension is pumped through the discharge line (30) to the outside of a borehole,characterized in that- the pumping device (40) is arranged on a base body (12) of the rotary drilling tool (10) along the discharge line (20),- in that a removal device (20) arranged on the underside comprises a plurality of hammer units (22), in each of which a hammer element (24) is driven in axially reversing manner,- in that the hammer elements (24) each have a vertically oriented piston which is in each case displaced in a cylinder housing of the hammer units (22), and- in that on the underside of the base body (12) is arranged a plurality of extraction openings (38), through which the removed ground material is extracted.
- Method according to claim 12,
characterized in that
the hammer unit (22) is operated with compressed air which emerges at an underside of the base body (12). - Method according to claim 12 or 13,
characterized in that
the removed ground material and the drilling suspension are extracted via a plurality of extraction openings (38) and a plurality of discharge sub-lines (34) which open out into a central portion (32) on which the pumping device (40) is arranged.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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EP16205044.7A EP3336301B1 (en) | 2016-12-19 | 2016-12-19 | Drilling apparatus and method for producing a borehole |
US16/469,275 US10934779B2 (en) | 2016-12-19 | 2017-11-27 | Rotary drilling tool and method for producing a bore |
CN201780078760.6A CN110062834B (en) | 2016-12-19 | 2017-11-27 | Rotary drill and method for producing a hole |
PCT/EP2017/080474 WO2018114230A1 (en) | 2016-12-19 | 2017-11-27 | Rotary drilling tool and method for creating a borehole |
KR1020197016971A KR102328874B1 (en) | 2016-12-19 | 2017-11-27 | Rotary drilling tools and methods for creating bores |
Applications Claiming Priority (1)
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EP16205044.7A EP3336301B1 (en) | 2016-12-19 | 2016-12-19 | Drilling apparatus and method for producing a borehole |
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EP3336301A1 EP3336301A1 (en) | 2018-06-20 |
EP3336301B1 true EP3336301B1 (en) | 2023-09-13 |
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US (1) | US10934779B2 (en) |
EP (1) | EP3336301B1 (en) |
KR (1) | KR102328874B1 (en) |
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WO (1) | WO2018114230A1 (en) |
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EP3336301B1 (en) * | 2016-12-19 | 2023-09-13 | BAUER Maschinen GmbH | Drilling apparatus and method for producing a borehole |
DE102019120019A1 (en) * | 2019-07-24 | 2021-01-28 | Herrenknecht Ag | Boring head for drilling a hole in the ground |
EP4411105A2 (en) | 2019-07-24 | 2024-08-07 | Herrenknecht AG | Drill head and method for creating a vertical bore in the ground |
PL4008877T3 (en) | 2020-12-07 | 2023-09-11 | Eurodrill Gmbh | Drilling drive device for an earth boring machine |
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Also Published As
Publication number | Publication date |
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CN110062834B (en) | 2021-09-28 |
KR20190085034A (en) | 2019-07-17 |
WO2018114230A1 (en) | 2018-06-28 |
US10934779B2 (en) | 2021-03-02 |
KR102328874B1 (en) | 2021-11-18 |
EP3336301A1 (en) | 2018-06-20 |
US20200102790A1 (en) | 2020-04-02 |
CN110062834A (en) | 2019-07-26 |
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