EP1381756B2 - Method and device for drilling a hole and for securing an anchorage in a bore hole - Google Patents
Method and device for drilling a hole and for securing an anchorage in a bore hole Download PDFInfo
- Publication number
- EP1381756B2 EP1381756B2 EP02766568A EP02766568A EP1381756B2 EP 1381756 B2 EP1381756 B2 EP 1381756B2 EP 02766568 A EP02766568 A EP 02766568A EP 02766568 A EP02766568 A EP 02766568A EP 1381756 B2 EP1381756 B2 EP 1381756B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- jacket tube
- drill
- cladding tube
- drilling
- hole
- 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.)
- Expired - Lifetime
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/004—Bolts held in the borehole by friction all along their length, without additional fixing means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Definitions
- the present invention relates to a method for drilling, in particular percussion or rotary impact drilling, a hole in soil or rock material and defining an anchor in the hole, wherein a borehole is formed by a drill bit mounted on a drill bit and at the same time a drill pipe in Distance is introduced and coupled to the drill bit cladding tube, wherein the cladding tube is introduced by a tensile stress on this coupling with the drill bit in the hole, as well as a device for drilling, in particular impact or rotary impact drilling, holes in soil or rock material and for producing an anchoring, wherein a drill bit mounted on a drill pipe forms a borehole and a tube surrounding the drill string and adjacent to the drill bit and thus coupled is provided, wherein the jacket tube by a tensile stress on this coupling with the drill bit in the borehole is insertable.
- WO 98/21439 In connection with the production of a hole or borehole in soil or rock material and a subsequent definition of an anchorage or a lining in the borehole, it is for example from WO 98/21439 and the WO 98/58132 it is known to introduce a cladding tube into the wellbore during the drilling operation, such as impact or rotational impact drilling, whereupon after completion of the bore, if necessary, a portion of the drillcrown is removed from the well together with the drill string while the cladding tube remains in the wellbore so that subsequently is formed by filling with a hardening mass anchor in the borehole.
- the drill pipe can be formed on its outer circumference with additional ribs and grooves, so that when the drill pipe remains in the borehole and a subsequent backfilling a correspondingly good anchor effect can be achieved.
- WO 00/66873 there is provided an apparatus and method for forming a wellbore in soil or rock material, wherein a wellbore is produced by a drilling apparatus coupled to a separate drive via a drill string, and a friction bolt assembly into the body via a separate drive and independently of the introduction of the drill bit drilled hole is driven.
- an anchor or an anchor device is introduced into the well, for example, from the EP-B 0 241 451 , of the US-A 4,490,074 , of the DE-AS 21 05 888 , of the US-A 4,310,266 , of the EP-A 0 875 663 and further references embodiments are known in which the subsequently introduced, tubular anchorage is held by corresponding holding elements on a reduced compared to the final diameter, whereupon after complete insertion into the borehole and removing the holding devices, the prestressed tube, which usually has a in the has substantially slit extending in the longitudinal direction, widens and thereby comes into contact with the borehole wall to achieve a desired anchoring effect or is pressed.
- the present invention therefore aims to provide a method and a device of the type mentioned above, wherein a simplified construction during the drilling process at least a provisional assurance is made possible and immediately after completion of a borehole anchoring to the inner wall of the well can be achieved ,
- the method according to the invention starting from a method of the type mentioned above substantially characterized in that the cladding tube formed with a longitudinal slot is at least partially introduced substantially into engagement with the wellbore during drilling. Since the cladding tube formed with a longitudinal slot rests at least partially against the borehole wall during the production of the borehole, it becomes possible to provide an at least provisional securing during the boring process, it being ensured by providing the longitudinal slit that the cladding tube is sufficiently elastic or rigid is compliant to oppose, even with at least partial abutment against the borehole wall a not excessively large resistance to an introduction of the cladding tube, for example by a tensile or impact stress.
- the longitudinal slot having a cladding tube that immediately after the completion of the bore a corresponding anchorage by at least partial contact with the borehole wall can be achieved, so that to form such an anchoring time savings over known embodiments, wherein after completion of a hole the drill pipe has been removed and a separate anchor has been introduced into the borehole.
- the inventive method can be independent of the pierced Apply soil or rock material, since the cladding tube is introduced directly into the borehole during the introduction or formation of the borehole, so that even with loose rock, in which possibly a break-in at least after removal of the drilling tool and before the introduction of the anchorage are feared would have to fear any difficulties such as subsequently produced anchorages, since the introduced during drilling cladding always gets the free passage cross section of the well even with loose rock upright.
- the drilling tool can be at least partially removed with the drill string through the interior of the remaining casing in the wellbore or it can be to increase the anchor effect and the drill pipe together with the drill in the borehole, so that not only by the system Cladding tube to the borehole inner wall results in an anchoring effect, but also by the remaining drilling tool in the hole and the drill string anchoring effect can be increased.
- an expandable element in the interior of the cladding tube can be defined in that the expandable element is widened by a impact stress, as corresponds to a further preferred embodiment of the method according to the invention.
- Such an expandable element not only provides a reliable abutment of the cladding tube at the borehole inner wall, but also counteracts a reduction of the clear cross section of the cladding tube, for example with a compressive stress by surrounding material or a tensile stress in the longitudinal direction of the anchor formed by the cladding tube otherwise, by providing the longitudinal slot, tensile stresses in the longitudinal direction of the cladding tube forming the anchorage could otherwise lead to a reduction in the armature cross section of the cladding tube, as a result of which the anchoring effect would be correspondingly reduced.
- the cladding tube is additionally introduced into the drilled hole by impact stress.
- the cladding tube for example, coupled with the drill bit in a suitable manner and will be introduced by a tensile stress in the wellbore during the drilling process.
- the cladding tube can be introduced by a Schlagbe-ung in the borehole simultaneously with the drilling process, not excessive forces on the drill bit for a take of the To introduce cladding tube.
- a particularly simple release or separation of the predetermined breaking point is preferably carried out according to the invention in that the release or separation of the predetermined breaking point is effected by a slight retraction of at least the impact shoe and the cladding tube mounted thereon and an impact of the impact shoe.
- the beater provided with festoneem or at least partially frictionally mounted in the produced wellbore casing by expanding the inner diameter of the longitudinally slotted cladding tube by the For example, by providing matched support surfaces in the region of the front end of the cladding tube, a separation or release of the predetermined breaking point can be achieved by widening or spreading the front end of the cladding tube so that the overall outer diameter of the cladding tube is properly aligned expanded cladding on the finished borehole wall is achieved.
- anchoring plate is proposed according to a further preferred embodiment that after completion of the well in a conventional manner, a filling of the interior of the cladding a hardening mass is made.
- the hardening material may leak out into the surrounding material, in particular in the front region and along the longitudinal slot of the expandable jacket tube, whereby the anchoring of the jacket tube is improved.
- a device of the type mentioned above is substantially characterized in that the cladding tube has a longitudinal slot extending substantially in the longitudinal direction of the cladding tube.
- an expandable element in the interior of the cladding tube can be introduced and expanded in abutment with the inner wall of the cladding tube.
- an expandable element which is expandable in abutment against the inner wall of the cladding tube, a secure anchoring of the cladding tube is achieved in the borehole, wherein such an expandable element, for example, a reduction in cross-section of the cladding tube, in particular in a tensile stress on the anchoring formed by the cladding tube, counteracts and thus reliably maintains a desired anchor effect.
- the expandable element is formed by a sleeve which is expandable by introducing a particular conical element by a shock load, in particular when providing a plurality proposed by expandable elements inside the cladding tube and for a suitable positioning thereof according to a further preferred embodiment, that the cladding tube is provided on its inner wall with protrusions or protrusions for positioning the expandable element.
- the cladding tube has at least one predetermined breaking point along its longitudinal slit running essentially in the longitudinal direction of the cladding tube.
- the cladding tube can be easily introduced into the well during the drilling process, while after completion of the well, the at least one predetermined breaking point is solved or separated to the cladding in contact with the Drill hole inner wall to achieve the anchorage bring.
- the at least one predetermined breaking point After completion of the bore, the at least one predetermined breaking point must be able to be released upon introduction of a corresponding force. In addition, however, the predetermined breaking point during the drilling process must ensure sufficient strength of the extending substantially over the entire length of the cladding longitudinal slot.
- the at least one predetermined breaking point along the longitudinal slot of the cladding tube is formed by a weld for bridging the longitudinal slot.
- the cladding tube is set at the end facing the drill bit on a beater of the drill bit, as corresponds to a further preferred embodiment of the device according to the invention.
- introduction of the cladding tube by a tensile stress by fixing the cladding tube to the drill bit or on the impact shoe can also be provided that on the protruding from the borehole end of the cladding tube a shock stress is applied, this particular for a greater strength having cladding tubes is possible.
- an anchoring plate can be fixed to the casing tube at the end projecting from the soil or rock material.
- the cladding tube has in the region of the adjoining the drill bit end in a conventional manner at least one passage opening for introducing the degraded soil or rock material in the interior of the cladding so that the degraded material can be discharged from the bore in the space defined between the drill string and the cladding, in particular annular space.
- Fig. 1 is generally denoted by 1 a drilling tool or a drill bit, which (s) with the interposition of a connector 2 and a schematically indicated by 3 beater with a running inside a cladding tube 4 drill string 5 is connected.
- the drill bit 1 is acted upon by the drill string 5 by a percussion or rotary impact drilling device arranged not shown in detail, outside the soil or rock material to be processed, whose surface is denoted by 6.
- the inner contour of a borehole formed by the drilling tool or the drill bit 1 is in Fig. 1 indicated schematically by 7.
- the cladding tube 4 has a substantially longitudinally extending longitudinal slot 8, as well as from the illustration of Fig. 2 is clearly visible. From the illustration according to Fig. 2 It can further be seen that the sleeve 4 is made of a prestressed material, in particular metal, wherein the material has a larger outer circumference in its relaxed state outside the borehole shown in solid lines than in the condition shown by dashed, thin lines in the borehole wherein the slot is designated 8 '.
- the cladding tube 4 is biased into the borehole to assure that the cladding tube 4 is at least partially in contact with the borehole inner wall 7 so as to permit at least provisional securement already during the drilling operation.
- the drill pipe 5 is provided with a central passage 9, through which a flushing fluid is introduced into the region of the drill bit 1, so that mined material at least partially in the region of the outer circumference of the casing 4 between the casing 4 and the borehole inner wall. 7 is applied, which can be achieved by the introduction of the flushing fluid at the interface between the outer periphery of the cladding tube and the borehole inner wall 7, a lubricating effect.
- Fig. 1 denotes a transition sleeve, which allows a definition of a drive device not shown for a percussion or rotary impact drilling.
- the cladding tube 4 in turn has a longitudinal slot 8 and is discontinued in partial areas of its outer circumference or formed with a reduced cross-section, wherein such stepped portions in Fig. 3 denoted by 11. It can thus be achieved only a partial investment of the cladding tube 4, in particular during the Einbringvorgangs, which is favorable, for example, at an expected high frictional resistance between the outer circumference of the cladding tube 4 and the inner wall of the well 7 to achieve a proper Bohrfort vinegars.
- the cladding tube 4 is introduced only by a shock load on the anchor head 6 through the transition sleeve 10 into the interior of the borehole 7, while in this embodiment no Wermitworm by a compound of the cladding tube 4 with the drill bit 1 is made.
- Such introduction of a cladding tube 4 by means of impact stress is possible, in particular in the case of a correspondingly more solid cladding tube or a cladding tube 4, which has a higher strength.
- Fig. 5a the formation or production of the bore hole 7 is shown, wherein the cladding tube 4, for example, similar to the embodiment according to FIG Fig. 4 is introduced by an impact stress on the anchor head 6, while no connection between the cladding tube 4 and the drill head 1 is provided.
- the cladding tube 4 for example, similar to the embodiment according to FIG Fig. 4 is introduced by an impact stress on the anchor head 6, while no connection between the cladding tube 4 and the drill head 1 is provided.
- an expandable element generally designated 15 is introduced into the interior of the cladding tube 4 in the interior of the cladding tube 4 in accordance with the arrow 16.
- the expandable element 15 consists of a sleeve 17, which is conically tapered and at least partially has a longitudinal slot 18, wherein in the interior of the sleeve 17, a conical element 19 can be introduced.
- expandable element 15 ensures that a cross-sectional reduction of the cladding tube 4, for example, by a compressive stress by surrounding material or upon exerting a tensile stress in the direction of a pull or release movement of the anchor does not occur, so that the desired anchoring effect is reliably maintained .
- a tensile stress on the anchor formed by the cladding tube 4 is in the event that the expandable element 15 is not provided, a reduction in cross-section through the longitudinal slot 8 of the cladding tube 4 possible, with such a reduction in cross-sectional area, the anchoring effect would be deteriorated.
- the expandable element 15 can also be brought directly into contact with the drill bit 1 remaining in the borehole 7, as shown in FIG Fig. 5d is indicated.
- a plurality of expandable elements 15 is introduced into the interior of the cladding tube 4 in order to achieve a corresponding support, the anchoring effect of the cladding tube 4 at different locations.
- Such multiple, expandable elements 15 can be arranged by appropriate design in particular of the conical sleeve 17 and vote with corresponding positioning projections 20.
- expandable elements 15 may be provided to fill the interior of the cladding tube 4 with a hardening mass after completion of the borehole 7 and optionally removing the drill string 5.
- Fig. 6 is in a further modified embodiment again denoted by 1 a drilling tool or a drill bit, which (s) is connected with the interposition of a connector 2 and a schematically indicated with 3 beater with a running inside a cladding tube 4 drill pipe 5, wherein the drill bit via the drill pipe 5 by a non-illustrated, outside of the soil or rock material to be processed, whose surface is denoted by 6, arranged impact or rotary impact drilling device is acted upon.
- the inner contour of a borehole formed by the drilling tool or the drill bit 1 is in Fig. 6 again denoted by 7.
- the cladding tube 4 in turn has a substantially longitudinally extending longitudinal slot 8, wherein at least one predetermined breaking point 29 along the longitudinal extension of the longitudinal slot 8 is provided, said predetermined breaking point is formed for example by a weld 29.
- the cladding tube 4 is hiebei the beater 3 fixed via an intermediate element or is taken by the beater 3 during the drilling process, so that immediately during the drilling process with the Longitudinal slot 8 trained cladding tube 4 is introduced into the borehole 7.
- a passage opening 31 is provided in the front region of the jacket tube 4, wherein the passage opening 31 is formed to form an enlarged, clear passage cross section of the longitudinal slot 8.
- This passage opening 31 passes through the drilling tool 1 degraded material in the defined between the sheath 4 and the drill pipe 5 space or annulus and is applied to the end facing away from the drill bit 1.
- a second passage opening in the cladding tube 4 may be provided on the radially opposite portion of the circumference.
- the cladding tube 4 and at least the beater 3 and parts of the drill bit mounted thereon for example, the ring bit with provision of a central drill bit and a radially surrounding ring bit, slightly withdrawn against the drilling or advancing direction 26, after which after this retraction again applying the impact shoe 3 via the drill pipe 5 in turn in the direction of the drilling operation 26, whereby the predetermined breaking point 29 is released.
Abstract
Description
Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Bohren, insbesondere Schlag- oder Drehschlagbohren, eines Loches in Boden- oder Gesteinsmaterial und Festlegen einer Verankerung in dem Loch, wobei durch eine an einem Bohrgestänge gelagerte Bohrkrone ein Bohrloch gebildet wird und gleichzeitig ein das Bohrgestänge in Abstand umgebendes und mit der Bohrkrone gekoppeltes Hüllrohr eingebracht wird, wobei das Hüllrohr durch eine Zugbeanspruchung über diese Kopplung mit der Bohrkrone in das Bohrloch eingebracht wird, sowie auf eine Vorrichtung zum Bohren, insbesondere Schlag- oder Drehschlagbohren, von Löchern in Boden- oder Gesteinsmaterial und zur Herstellung einer Verankerung, wobei eine an einem Bohrgestänge gelagerte Bohrkrone ein Bohrloch ausbildet und ein das Bohrgestänge in Abstand umgebendes und an die Bohrkrone anschließendes und damit gekoppeltes Hüllrohr vorgesehen ist, wobei das Hüllrohr durch eine Zugbeanspruchung über diese Kopplung mit der Bohrkrone in das Bohrloch einbringbar ist.The present invention relates to a method for drilling, in particular percussion or rotary impact drilling, a hole in soil or rock material and defining an anchor in the hole, wherein a borehole is formed by a drill bit mounted on a drill bit and at the same time a drill pipe in Distance is introduced and coupled to the drill bit cladding tube, wherein the cladding tube is introduced by a tensile stress on this coupling with the drill bit in the hole, as well as a device for drilling, in particular impact or rotary impact drilling, holes in soil or rock material and for producing an anchoring, wherein a drill bit mounted on a drill pipe forms a borehole and a tube surrounding the drill string and adjacent to the drill bit and thus coupled is provided, wherein the jacket tube by a tensile stress on this coupling with the drill bit in the borehole is insertable.
Im Zusammenhang mit der Herstellung eines Loches bzw. Bohrlochs in Boden- oder Gesteinsmaterial und einer nachträglichen Festlegung einer Verankerung bzw. einer Auskleidung in dem Bohrloch ist es beispielsweise aus der
Aus der
Aus der
Alternativ ist es nach Herstellung eines Bohrlochs bekannt, das Bohrwerkzeug mit dem Bohrgestänge aus dem Bohrloch zu entfernen, woran anschließend ein Anker bzw. eine Ankervorrichtung in das Bohrloch eingebracht wird, wobei beispielsweise aus der
Die vorliegende Erfindung zielt daher darauf ab, ein Verfahren sowie eine Vorrichtung der eingangs genannten Art zur Verfügung zu stellen, wobei bei vereinfachter Konstruktion während des Bohrvorgangs eine wenigstens provisorische Sicherung ermöglicht wird und unmittelbar nach Fertigstellung eines Bohrlochs eine Verankerung an der Innenwand des Bohrlochs erzielbar ist.The present invention therefore aims to provide a method and a device of the type mentioned above, wherein a simplified construction during the drilling process at least a provisional assurance is made possible and immediately after completion of a borehole anchoring to the inner wall of the well can be achieved ,
Zur Lösung dieser Aufgaben ist das erfindungsgemäße Verfahren ausgehend von einem Verfahren der eingangs genannten Art im wesentlichen dadurch gekennzeichnet, daß das mit einem Längsschlitz ausgebildete Hüllrohr wenigstens teilweise im wesentlichen in Anlage an das Bohrloch während des Bohrens eingebracht wird. Da das mit einem Längsschlitz ausgebildete Hüllrohr während der Herstellung der Bohrung wenigstens teilweise an der Bohrlochwand anliegt, wird es möglich, eine zumindest provisorische Sicherung während des Bohrvorgangs zur Verfügung zu stellen, wobei durch das Vorsehen des Längsschlitzes sichergestellt wird, daß das Hüllrohr ausreichend elastisch bzw. nachgiebig ist, um selbst bei wenigstens teilweiser Anlage an der Bohrlochwand einen nicht übermäßig großen Widerstand gegenüber einem Einbringen des Hüllrohrs beispielsweise durch eine Zug- oder Schlagbeanspruchung entgegenzusetzen. Darüber hinaus wird durch das einen Längsschlitz aufweisende Hüllrohr sichergestellt, daß unmittelbar nach der Fertigstellung der Bohrung eine entsprechende Verankerung durch wenigstens teilweise Anlage an die Bohrlochwand erzielbar ist, so daß sich zur Ausbildung einer derartigen Verankerung eine Zeitersparnis gegenüber bekannten Ausbildungen, wobei nach Fertigstellung einer Bohrung das Bohrgestänge entfernt und ein getrennter Anker in das Bohrloch eingebracht wurde, erzielen läßt. Darüber hinaus läßt sich das erfindungsgemäße Verfahren unabhängig von dem zu durchbohrenden Boden- bzw. Gesteinsmaterial anwenden, da das Hüllrohr unmittelbar beim Einbringen bzw. Ausbilden des Bohrloches in das Bohrloch eingebracht wird, so daß selbst bei lockerem Gestein, bei welchem gegebenenfalls ein Hereinbrechen zumindest nach dem Entfernen des Bohrwerkzeugs und vor dem Einbringen der Verankerung befürchtet werden müßte, keinerlei Schwierigkeiten wie bei nachträglich herzustellenden Verankerungen zu befürchten sind, da das beim Bohren eingebrachte Hüllrohr immer selbst bei lockerem Gestein den freien Durchtrittsquerschnitt des Bohrloches aufrecht erhält. Nach der Fertigstellung des Bohrloches kann entweder das Bohrwerkzeug wenigstens teilweise mit dem Bohrgestänge durch das Innere des im Bohrloch verbleibenden Hüllrohrs entfernt werden oder es kann zur Erhöhung der Ankerwirkung auch das Bohrgestänge samt dem Bohrwerkzeug im Bohrloch verbleiben, so daß sich nicht nur durch die Anlage des Hüllrohrs an die Bohrlochinnenwand ein Verankerungseffekt ergibt, sondern auch durch das im Bohrloch verbleibende Bohrwerkzeug sowie das Bohrgestänge die Ankerwirkung erhöht werden kann. Beim Einbringen des Hüllrohrs, welches einen Längsschlitz aufweist, wenigstens teilweise in Anlage an die Bohrlochwand ist weiters davon auszugehen, daß bei einem an sich bekannten Einbringen eines Spülfluids in dem Bereich der Bohrkrone und einem damit erfolgenden Austragen von abgebautem Material auch,im Bereich des Außenumfangs des Hüllrohrs eine entsprechend flüssige bzw. zähflüssige Materialschicht vorliegt, welche einen schmier- bzw. Gleiteffekt beim Einbringen des Hüllrohrs ergibt. Nach Fertigstellung der Bohrung und somit Unterbrechung einer weiteren Zufuhr eines Spülfluids ist davon auszugehen, daß bei einem Aushärten des Materials im Bereich des Außenumfangs des Hüllrohrs eine entsprechende Erhöhung der Reibung zwischen dem Außenumfang des Hüllrohrs und der Bohrlochinnenwand auftritt, so daß sich eine entsprechend gute Verankerungswirkung des an der Bohrlochinnenwand anliegenden Hüllrohrs erzielen läßt.To solve these objects, the method according to the invention, starting from a method of the type mentioned above substantially characterized in that the cladding tube formed with a longitudinal slot is at least partially introduced substantially into engagement with the wellbore during drilling. Since the cladding tube formed with a longitudinal slot rests at least partially against the borehole wall during the production of the borehole, it becomes possible to provide an at least provisional securing during the boring process, it being ensured by providing the longitudinal slit that the cladding tube is sufficiently elastic or rigid is compliant to oppose, even with at least partial abutment against the borehole wall a not excessively large resistance to an introduction of the cladding tube, for example by a tensile or impact stress. In addition, it is ensured by the longitudinal slot having a cladding tube that immediately after the completion of the bore a corresponding anchorage by at least partial contact with the borehole wall can be achieved, so that to form such an anchoring time savings over known embodiments, wherein after completion of a hole the drill pipe has been removed and a separate anchor has been introduced into the borehole. In addition, the inventive method can be independent of the pierced Apply soil or rock material, since the cladding tube is introduced directly into the borehole during the introduction or formation of the borehole, so that even with loose rock, in which possibly a break-in at least after removal of the drilling tool and before the introduction of the anchorage are feared would have to fear any difficulties such as subsequently produced anchorages, since the introduced during drilling cladding always gets the free passage cross section of the well even with loose rock upright. After completion of the wellbore either the drilling tool can be at least partially removed with the drill string through the interior of the remaining casing in the wellbore or it can be to increase the anchor effect and the drill pipe together with the drill in the borehole, so that not only by the system Cladding tube to the borehole inner wall results in an anchoring effect, but also by the remaining drilling tool in the hole and the drill string anchoring effect can be increased. When introducing the cladding tube, which has a longitudinal slot, at least partially in contact with the borehole wall is further assumed that in a known introduction of a rinsing fluid in the region of the drill bit and thus carried out discharge of mined material also, in the region of the outer periphery the cladding tube a correspondingly liquid or viscous material layer is present, which gives a lubricating or lubricating effect when introducing the cladding tube. After completion of the bore and thus interruption of a further supply of a rinsing fluid, it is to be assumed that upon hardening of the material in the region of the outer circumference of the cladding tube, a corresponding increase in the friction between the outer circumference of the cladding tube and the borehole inner wall occurs, so that a correspondingly good anchoring effect of the adjacent to the borehole wall cladding can achieve.
Zur Unterstützung des Verankerungseffekts des wenigstens teilweise bereits beim Einbringen an der Bohrlochinnenwand anliegenden Hüllrohrs wird gemäß einer bevorzugten Ausführungsform vorgeschlagen, daß nach Fertigstellung des Bohrlochs und Entfernen des Bohrgestänges ein aufweitbares Element in das Innere des Hüllrohrs eingebracht und aufgeweitet wird. Ein derartiges Einbringen eines aufweitbaren Elements ermöglicht, daß das Hüllrohr über Teilbereiche gegebenenfalls an der Bohrlochinnenwand zuverlässig festgelegt wird, so daß sich der Verankerungseffekt erhöhen läßt.In support of the anchoring effect of the at least partially already applied during insertion of the borehole inner wall cladding tube is proposed according to a preferred embodiment, that after completion of the borehole and removing the drill string an expandable element is introduced into the interior of the cladding tube and expanded. Such introduction of an expandable element enables the cladding tube to be reliably fixed on subsections, where appropriate, on the borehole inner wall, so that the anchoring effect can be increased.
In besonders einfacher Weise läßt sich ein aufweitbares Element im Inneren des Hüllrohrs dadurch festlegen, daß das aufweitbare Element durch eine Schlagbeanspruchung aufgeweitet wird, wie dies einer weiters bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens entspricht. Ein derartiges aufweitbares Element stellt nicht nur eine zuverlässige Anlage des Hüllrohrs an der Bohrlochinnenwand zur Verfügung, sondern wirkt auch einer Verringerung des lichten Querschnitts des Hüllrohrs, beispielsweise bei einer Druckbeanspruchung durch umliegendes Material oder einer Zugbeanspruchung in Längsrichtung des von dem Hüllrohr gebildeten Ankers entgegen, da durch Vorsehen des Längsschlitzes insbesondere Zugbeanspruchungen in Längsrichtung des die Verankerung bildenden Hüllrohrs andernfalls zu einer Verringerung des Ankerquerschnitts des Hüllrohrs führen könnten, wodurch die Verankerungswirkung entsprechend herabgesetzt würde.In a particularly simple manner, an expandable element in the interior of the cladding tube can be defined in that the expandable element is widened by a impact stress, as corresponds to a further preferred embodiment of the method according to the invention. Such an expandable element not only provides a reliable abutment of the cladding tube at the borehole inner wall, but also counteracts a reduction of the clear cross section of the cladding tube, for example with a compressive stress by surrounding material or a tensile stress in the longitudinal direction of the anchor formed by the cladding tube otherwise, by providing the longitudinal slot, tensile stresses in the longitudinal direction of the cladding tube forming the anchorage could otherwise lead to a reduction in the armature cross section of the cladding tube, as a result of which the anchoring effect would be correspondingly reduced.
In Abhängigkeit von dem umgebenden Material und somit auch von der Beschaffenheit des Hüllrohrs wird für ein Einbringen des Hüllrohrs während des Bohrvorgangs bevorzugt vorgeschlagen, daß das Hüllrohr zusätzlich durch eine Schlagbeanspruchung in das Bohrloch eingebracht wird. Es ist erfindungsgemäß das Hüllrohr beispielsweise mit der Bohrkrone in geeigneter Weise gekoppelt und wird durch eine Zugbeanspruchung in das Bohrloch während des Bohrvorgangs eingebracht werden. Insbesondere bei einen größeren Materialquerschnitt und somit höhere Festigkeit aufweisenden Hüllrohren, welche zur Bereitstellung einer entsprechend widerstandsfähigeren Verankerung eingesetzt werden, kann zusätzlich das Hüllrohr mittels einer Schlagbeanspruchung in das Bohrloch gleichzeitig mit dem Bohrvorgang eingebracht werden, um nicht übermäßige Kräfte auf die Bohrkrone für eine Mitnahme des Hüllrohrs einbringen zu müssen.Depending on the surrounding material and thus also on the nature of the cladding tube, it is preferably proposed for an introduction of the cladding tube during the drilling process that the cladding tube is additionally introduced into the drilled hole by impact stress. It is according to the invention, the cladding tube, for example, coupled with the drill bit in a suitable manner and will be introduced by a tensile stress in the wellbore during the drilling process. In particular, with a larger material cross-section and thus higher strength having ducts, which are used to provide a more resistant anchorage, in addition, the cladding tube can be introduced by a Schlagbeanspruchung in the borehole simultaneously with the drilling process, not excessive forces on the drill bit for a take of the To introduce cladding tube.
Für ein ordnungsgemäßes Einbringen des Hüllrohrs während des Bohrvorgangs wird in diesem Zusammenhang gemäß einer weiters bevorzugten Ausführungsform vorgeschlagen, daß nach Fertigstellung der Bohrung wenigstens eine von einer Sollbruchstelle definierte Verbindung entlang des im wesentlichen in Längsrichtung geschlitzten Hüllrohrs gelöst wird.For a proper introduction of the cladding tube during the drilling process is proposed in this context according to a further preferred embodiment, that after completion of the bore at least one defined by a predetermined breaking point connection along the slotted substantially longitudinally cladding tube is achieved.
Ein besonders einfaches Lösen bzw. Trennen der Sollbruchstelle wird erfindungsgemäß bevorzugt dadurch durchgeführt, daß das Lösen bzw. Trennen der Sollbruchstelle durch ein geringfügiges Zurückziehen zumindest des Schlagschuhes und des daran gelagerten Hüllrohres und ein Beaufschlagen des Schlagschuhes vorgenommen wird. Es kann somit nach Fertigstellung der Bohrung durch geringfügiges Zurückziehen zumindest des Schlagschuhs und gegebenenfalls der daran gelagerten Ringbohrkrone und nachfolgendes, nochmaliges Beaufschlagen des Schlagschuhs bei festgehaltenem bzw. wenigstens teilweise reibschlüssig im hergestelltem Bohrloch gelagerten Hüllrohr durch ein Aufweiten des Innendurchmessers des in Längsrichtung geschlitzten Hüllrohrs durch den Schlagschuh beispielsweise durch Vorsehen von aufeinander abgestimmten Auflageflächen im Bereich des vorderen Endes des Hüllrohrs ein Auftrennen bzw. Lösen der Sollbruchstelle unter einem Aufweiten bzw. Aufspreizen des vorderen Endes des Hüllrohrs erzielt werden, so daß insgesamt eine ordnungsgemäße Anlage des Außendurchmessers des aufgeweiteten Hüllrohrs an der fertiggestellten Bohrlochwand erzielbar ist.A particularly simple release or separation of the predetermined breaking point is preferably carried out according to the invention in that the release or separation of the predetermined breaking point is effected by a slight retraction of at least the impact shoe and the cladding tube mounted thereon and an impact of the impact shoe. It can thus after completion of the bore by slight retraction of at least the beater and possibly the ring core and subsequent, the beater provided with festgehaltenem or at least partially frictionally mounted in the produced wellbore casing by expanding the inner diameter of the longitudinally slotted cladding tube by the For example, by providing matched support surfaces in the region of the front end of the cladding tube, a separation or release of the predetermined breaking point can be achieved by widening or spreading the front end of the cladding tube so that the overall outer diameter of the cladding tube is properly aligned expanded cladding on the finished borehole wall is achieved.
Zur weiteren Erhöhung der Verankerungswirkung, insbesondere bei losem Gestein bzw. im Zusammenwirken mit einer am aus dem Bohrloch vorragenden Ende gegebenenfalls festzulegenden Verankerungsplatte wird gemäß einer weiters bevorzugten Ausführungsform vorgeschlagen, daß nach Fertigstellung der Bohrung in an sich bekannter Weise ein Verfüllen des Inneren des Hüllrohres mit einer aushärtenden Masse vorgenommen wird. Das aushärtende Material kann hiebei insbesondere im vorderen Bereich sowie entlang des Längsschlitzes des aufweitbaren Hüllrohrs in das umgebende Material austreten, wodurch die Verankerung des Hüllrohrs verbessert wird. Durch ein Austreten des aushärtenden Materials und ein nachträgliches Verspannen mit einer am außenliegenden Ende des Hüllrohrs vorzusehenden Ankerplatte läßt sich darüber hinaus eine Befestigung von gegebenenfalls lose geschichtetem Boden- bzw. Gesteinsmaterial erzielen.To further increase the anchoring effect, especially in loose rock or in cooperation with a projecting from the well end end optionally anchoring plate is proposed according to a further preferred embodiment that after completion of the well in a conventional manner, a filling of the interior of the cladding a hardening mass is made. The hardening material may leak out into the surrounding material, in particular in the front region and along the longitudinal slot of the expandable jacket tube, whereby the anchoring of the jacket tube is improved. By a leakage of the curing material and a subsequent bracing with an outer end of the cladding tube to be provided anchor plate can be beyond a fortification of possibly loosely layered soil or rock material can be achieved.
Zur Lösung der eingangs gestellten Aufgaben ist darüber hinaus eine Vorrichtung der eingangs genannten Art im wesentlichen dadurch gekennzeichnet, daß das Hüllrohr einen im wesentlichen in Längsrichtung des Hüllrohrs verlaufenden Längsschlitz aufweist. Durch Vorsehen eines mit einem Längsschlitz ausgebildeten Hüllrohrs wird sichergestellt, daß das Hüllrohr mit entsprechend geringem Reibungswiderstand in das Bohrloch und wenigstens teilweise in Anlage an die Bohrlochinnenwand während des Bohrvorgangs eingebracht werden kann, worauf nach Beendigung des Bohrvorgangs durch die unmittelbare, wenigstens teilweise Anlage des Hüllrohrs an der Bohrlochinnenwand eine entsprechende Verankerungswirkung erzielbar ist.To solve the problems initially posed a device of the type mentioned above is substantially characterized in that the cladding tube has a longitudinal slot extending substantially in the longitudinal direction of the cladding tube. By providing a cladding tube formed with a longitudinal slot, it is ensured that the cladding tube can be introduced into the wellbore at least partially in contact with the borehole inner wall during the drilling operation, after which the drilling operation is terminated by the immediate, at least partial abutment of the cladding tube at the borehole inner wall a corresponding anchoring effect can be achieved.
Zur Unterstützung der Verankerungswirkung wird gemäß einer bevorzugten Ausführungsform vorgeschlagen, daß nach Fertigstellung des Bohrlochs und Entfernen des Bohrgestänges ein aufweitbares Element in das Innere des Hüllrohres einbringbar und in Anlage an die Innenwand des Hüllrohres aufweitbar ist. Durch ein derartiges aufweitbares Element, welches in Anlage an die Innenwand des Hüllrohrs aufweitbar ist, wird eine sichere Verankerung des Hüllrohrs im Bohrloch erzielt, wobei ein derartiges aufweitbares Element beispielsweise einer Querschnittverringerung des Hüllrohrs, insbesondere bei einer Zugbeanspruchung auf die durch das Hüllrohr gebildete Verankerung, entgegenwirkt und somit eine gewünschte Ankerwirkung zuverlässig aufrecht erhält.In support of the anchoring effect is proposed according to a preferred embodiment that after completion of the borehole and removing the drill string an expandable element in the interior of the cladding tube can be introduced and expanded in abutment with the inner wall of the cladding tube. By such an expandable element, which is expandable in abutment against the inner wall of the cladding tube, a secure anchoring of the cladding tube is achieved in the borehole, wherein such an expandable element, for example, a reduction in cross-section of the cladding tube, in particular in a tensile stress on the anchoring formed by the cladding tube, counteracts and thus reliably maintains a desired anchor effect.
Für eine besonders günstige Festlegung des aufweitbaren Elements im Inneren des Hüllrohrs wird gemäß einer besonders bevorzugten Ausführungsform vorgeschlagen, daß das aufweitbare Element von einer Hülse gebildet ist, welche durch Einbringen eines insbesondere konischen Elements durch eine Schlagbeanspruchung aufweitbar ist, wobei insbesondere bei Vorsehen von einer Mehrzahl von aufweitbaren Elementen im Inneren des Hüllrohrs und für eine geeignete Positionierung derselben gemäß einer weiters bevorzugten Ausführungsform vorgeschlagen wird, daß das Hüllrohr an seiner Innenwand mit Erhebungen oder Vorsprüngen zum Positionieren des aufweitbaren Elements versehen ist.For a particularly favorable definition of the expandable element in the interior of the cladding tube is proposed according to a particularly preferred embodiment that the expandable element is formed by a sleeve which is expandable by introducing a particular conical element by a shock load, in particular when providing a plurality proposed by expandable elements inside the cladding tube and for a suitable positioning thereof according to a further preferred embodiment, that the cladding tube is provided on its inner wall with protrusions or protrusions for positioning the expandable element.
Für ein besonders einfaches Einbringen wird bevorzugt vorgeschlagen, daß das Hüllrohr entlang seines im wesentlichen in Längsrichtung des Hüllrohrs verlaufenden Längsschlitzes wenigstens eine Sollbruchstelle aufweist. Durch die erfindungsgemäß vorgesehene, wenigstens eine Sollbruchstelle entlang des Längsschlitzes des Hüllrohrs läßt sich in einfacher Weise das Hüllrohr während des Bohrvorgangs in das Bohrloch einbringen, während nach Fertigstellung des Bohrloches die wenigstens eine Sollbruchstelle gelöst bzw. aufgetrennt wird, um das Hüllrohr in Anlage an die Bohrlochinnenwand zur Erzielung der Verankerung zu bringen.For a particularly simple introduction, it is preferably proposed that the cladding tube has at least one predetermined breaking point along its longitudinal slit running essentially in the longitudinal direction of the cladding tube. By inventively provided, at least one predetermined breaking point along the longitudinal slot of the cladding tube, the cladding tube can be easily introduced into the well during the drilling process, while after completion of the well, the at least one predetermined breaking point is solved or separated to the cladding in contact with the Drill hole inner wall to achieve the anchorage bring.
Nach Fertigstellung der Bohrung muß die wenigstens eine Sollbruchstelle bei Einbringen einer entsprechenden Kraft gelöst werden können. Darüber hinaus muß jedoch die Sollbruchstelle während des Bohrvorganges eine ausreichende Festigkeit des sich im wesentlichen über die gesamte Länge des Hüllrohrs erstreckenden Längsschlitzes sicherstellen. Zu diesem Zweck wird gemäß einer weiters bevorzugten Ausführungsform vorgeschlagen, daß die wenigstens eine Sollbruchstelle entlang des Längsschlitzes des Hüllrohres von einer Schweißstelle zur Überbrückung des Längsschlitzes ausgebildet ist. Durch entsprechende Positionierung und Ausbildung sowie gegebenenfalls Anzahl von Schweißstellen als Sollbruchstelle kann hiebei unterschiedlichen Anforderungen sowohl betreffend die Widerstandsfähigkeit während des Bohrvorganges als auch für ein Auftrennen bzw. Lösen der Sollbruchstelle nach Fertigstellung der Bohrung Rechnung getragen werden.After completion of the bore, the at least one predetermined breaking point must be able to be released upon introduction of a corresponding force. In addition, however, the predetermined breaking point during the drilling process must ensure sufficient strength of the extending substantially over the entire length of the cladding longitudinal slot. For this purpose, it is proposed according to a further preferred embodiment that the at least one predetermined breaking point along the longitudinal slot of the cladding tube is formed by a weld for bridging the longitudinal slot. By appropriate positioning and training and optionally number of welds as a predetermined breaking point hiebei different requirements both in terms of resistance during the drilling process as well as for a separation or release of the predetermined breaking point after completion of the bore can be taken into account.
Für ein ordnungsgemäßes Einbringen des Hüllrohrs während des Bohrvorganges wird darüber hinaus vorgeschlagen, daß das Hüllrohr an dem zur Bohrkrone gewandten Ende an einem Schlagschuh der Bohrkrone festgelegt ist, wie dies einer weiters bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung entspricht. Neben einem derartigen Einbringen des Hüllrohrs durch eine Zugbeanspruchung durch Festlegung des Hüllrohrs an der Bohrkrone bzw. am Schlagschuh kann darüber hinaus vorgesehen sein, daß auf das aus dem Bohrloch vorragende Ende des Hüllrohrs eine Schlagbeanspruchung ausgeübt wird, wobei dies insbesondere für eine größere Festigkeit aufweisende Hüllrohre möglich ist.For a proper introduction of the cladding tube during the drilling process is also proposed that the cladding tube is set at the end facing the drill bit on a beater of the drill bit, as corresponds to a further preferred embodiment of the device according to the invention. In addition to such introduction of the cladding tube by a tensile stress by fixing the cladding tube to the drill bit or on the impact shoe can also be provided that on the protruding from the borehole end of the cladding tube a shock stress is applied, this particular for a greater strength having cladding tubes is possible.
Zur Erzielung einer entsprechenden Verankerungswirkung des nach der Fertigstellung der Bohrung aufweitbaren Hüllrohrs wird gemäß einer weiters bevorzugten Ausführungsform vorgeschlagen, daß das Hüllrohr aus einem unter Vorspannung stehenden Material, insbesondere Metall, ausgebildet ist. Zur Fertigstellung des Ankers bzw. zur Erhöhung der Ankerwirkung insbesondere bei teilweise losen Schichten des Gesteinsmaterials wird darüber hinaus erfindungsgemäß bevorzugt vorgeschlagen, daß nach Fertigstellung des Bohrlochs am Hüllrohr an dem aus dem Boden- oder Gesteinsmaterial vorragenden Ende eine Verankerungsplatte festlegbar ist.In order to achieve a corresponding anchoring effect of the expandable after completion of the bore cladding tube is proposed according to a further preferred embodiment, that the cladding tube from a prestressed material, in particular metal, is formed. For the completion of the anchor or to increase the anchor effect in particular at partially loose layers of rock material moreover, it is preferably proposed according to the invention that, after completion of the borehole, an anchoring plate can be fixed to the casing tube at the end projecting from the soil or rock material.
Für einen ordnungsgemäßen Abtransport des abgebauten Gesteins wird darüber hinaus gemäß einer weiters bevorzugten Ausführungsform vorgeschlagen, daß das Hüllrohr im Bereich des an die Bohrkrone anschließenden Endes in an sich bekannter Weise wenigstens eine Durchtrittsöffnung zum Einbringen des abgebauten Boden- oder Gesteinsmaterials in das Innere des Hüllrohres aufweist, so daß das abgebaute Material auch in dem zwischen dem Bohrgestänge und dem Hüllrohr definierten Freiraum, insbesondere Ringraum, aus der Bohrung ausgebracht werden kann.For a proper removal of the mined rock is also proposed according to a further preferred embodiment that the cladding tube has in the region of the adjoining the drill bit end in a conventional manner at least one passage opening for introducing the degraded soil or rock material in the interior of the cladding so that the degraded material can be discharged from the bore in the space defined between the drill string and the cladding, in particular annular space.
Die Erfindung wird nachfolgend anhand von in der beiliegenden Zeichnung schematisch dargestellten Ausführungsbeispielen näher erläutert. In dieser zeigen:
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Fig. 1 eine schematische Seitenansicht, teilweise im Schnitt, einer ersten Ausführungsform einer erfindungsgemäßen Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens; -
Fig. 2 einen schematischen Schnitt in vergrößerter Darstellung gedreht entlang der Linie II-II derFig. 1 ; -
Fig. 3 in einer zuFig. 1 ähnlichen Darstellung eine abgewandelte Ausführungsform einer erfindungsgemäßen Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens; -
Fig. 4 in einer wiederum zuFig. 1 ähnlichen Darstellung ein Vergleichsbeispiel einer Vorrichtung zur Durchführung des Verfahrens; -
Fig. 5 unterschiedliche Stufen während der Durchführung des erfindungsgemäßen Verfahrens unter Verwendung einer erfindungsgemäßen Vorrichtung, wobeiFig. 5a in einer zuFig. 1 ähnlichen Darstellung den Vorgang einer Herstellung eines Bohrlochs mit dem erfindungsgemäßen Verfahren zeigt,Fig. 5b die Entfernung des Bohrgestänges nach der Fertigstellung des Bohrlochs zeigt,Fig. 5c das Einbringen eines aufweitbaren Elements in das Innere des Hüllrohrs nach Fertigstellung des Bohrlochs und Entfernung des Bohrgestänges zeigt, undFig. 5d den Vorgang eines Aufweitens des aufweitbaren Elements zeigt; und -
Fig. 6 eine schematische Seitenansicht einer weiteren abgewandelten Ausführungsform einer erfindungsgemäßen Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens.
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Fig. 1 a schematic side view, partially in section, of a first embodiment of a device according to the invention for carrying out the method according to the invention; -
Fig. 2 a schematic section in an enlarged view along the line II-II ofFig. 1 ; -
Fig. 3 in one tooFig. 1 a similar representation of a modified embodiment of a device according to the invention for carrying out the method according to the invention; -
Fig. 4 in a turn tooFig. 1 similar representation of a comparative example of an apparatus for performing the method; -
Fig. 5 different stages during the implementation of the method according to the invention using a device according to the invention, whereinFig. 5a in one tooFig. 1 similar representation shows the process of producing a borehole with the method according to the invention,Fig. 5b shows the removal of the drill pipe after completion of the well,Fig. 5c shows the introduction of an expandable element into the interior of the cladding tube after completion of the borehole and removal of the drill string, andFig. 5d shows the process of expanding the expandable element; and -
Fig. 6 a schematic side view of another modified embodiment of a device according to the invention for carrying out the method according to the invention.
In
Wie aus
Aus
Bei der in
Mit 10 ist in
Bei der in
Das Hüllrohr 4 weist wiederum einen Längsschlitz 8 auf und ist in Teilbereichen seines Außenumfangs abgesetzt bzw. mit verringertem Querschnitt ausgebildet, wobei derartige abgesetzte Teilbereiche in
Bei der Ausführungsform gemäß
Bei den in
In
Nach der Fertigstellung des Bohrlochs 7 wird, wie dies in
Nach Entfernung des Bohrgestänges wird in das Innere des Hüllrohrs 4 ein allgemein mit 15 bezeichnetes, aufweitbares Element entsprechend dem Pfeil 16 in das Innere des Hüllrohrs 4 eingebracht. Das aufweitbare Element 15 besteht aus einer Hülse 17, welche sich konisch verjüngend ausgebildet ist und wenigstens teilweise einen Längsschlitz 18 aufweist, wobei in das Innere der Hülse 17 ein konisches Element 19 einbringbar ist.After removal of the
Nach Einbringen bzw. Einschieben des aufweitbaren, zweiteiligen Elements 15 in das Innere des Hüllrohrs 4, beispielsweise in den Bereich von Anschlägen bzw. Vorsprüngen 20 zum Positionieren des aufweitbaren Elements, wird auf das konische Element 19 eine Schlagbeanspruchung über die Übergangsmuffe 10 ausgeübt, so daß das zweiteilige, aufweitbare Element 15 an der gewünschten Position im Inneren des Hüllrohrs positioniert und an der Innenwand des Hüllrohrs 4 festgelegt ist.After insertion or insertion of the expandable, two-
Dieses eingebrachte, aufweitbare Element 15 stellt sicher, daß eine Querschnittsverringerung des Hüllrohrs 4 beispielsweise durch eine Druckbeanspruchung durch umgebendes Material bzw. bei Ausübung einer Zugbeanspruchung in Richtung einer Auszieh- bzw. Lösebewegung der Verankerung nicht auftritt, so daß die gewünschte Verankerungswirkung zuverlässig aufrecht erhalten wird. Bei einer Zugbeanspruchung auf den durch das Hüllrohr 4 gebildeten Anker wird für den Fall, daß das aufweitbare Element 15 nicht vorgesehen ist, eine Querschnittsverringerung durch den Längsschlitz 8 des Hüllrohrs 4 möglich, wobei bei einer derartigen Querschnittsverringerung die Verankerungswirkung verschlechtert wäre.This introduced,
Anstelle eines Vorsehens von Positioniervorsprüngen 20 kann das aufweitbare Element 15 auch unmittelbar in Anlage an die im Bohrloch 7 verbliebene Bohrkrone 1 gebracht werden, wie dies in
Alternativ oder zusätzlich zum Einbringen der aufweitbaren Elemente 15 kann vorgesehen sein, nach Fertigstellung des Bohrlochs 7 und gegebenenfalls Entfernen des Bohrgestänges 5 das Innere des Hüllrohrs 4 mit einer aushärtenden Masse zu verfüllen.Alternatively or in addition to the introduction of the
In
Wie aus
Für einen Abtransport des durch die Bohrkrone 1 abgebauten Materials ist im vorderen Bereich des Hüllrohrs 4 eine Durchtrittsöffnung 31 vorgesehen, wobei die Durchtrittsöffnung 31 unter Ausbildung eines vergrößerten, lichten Durchtrittsquerschnitts des Längsschlitzes 8 ausgebildet wird. Durch diese Durchtrittsöffnung 31 gelangt durch das Bohrwerkzeug 1 abgebautes Material in den zwischen dem Hüllrohr 4 und dem Bohrgestänge 5 definierten Freiraum bzw. Ringraum und wird am von der Bohrkrone 1 abgewandten Ende ausgebracht. Falls erforderlich, kann beispielsweise symmetrisch zur Durchtrittsöffnung 31 eine zweite Durchtrittsöffnung im Hüllrohr 4 am radial gegenüberliegenden Teilbereich des Umfangs vorgesehen sein.For a removal of the material degraded by the drill bit 1, a
Nach Fertigstellung der Bohrung erfolgt durch ein Lösen bzw. Auftrennen der die Sollbruchstelle 29 definierenden Schweißstelle ein Aufweiten des unter Vorspannung stehenden Hüllrohrs 4, wodurch die gewünschte Verankerungswirkung erzielbar ist.After completion of the bore is carried out by loosening or separating the
Nach Fertigstellung der Bohrung werden das Hüllrohr 4 und zumindest der Schlagschuh 3 sowie daran gelagerte Teile der Bohrkrone, beispielsweise die Ringbohrkrone bei Vorsehen einer zentralen Bohrkrone und einer radial umgebenden Ringbohrkrone, geringfügig entgegen der Bohr- bzw. Vortriebsrichtung 26 zurückgezogen, worauf nach diesem Zurückziehen ein nochmaliges Beaufschlagen des Schlagschuhs 3 über das Bohrgestänge 5 wiederum in Richtung des Bohrvorgangs 26 erfolgt, wodurch die Sollbruchstelle 29 gelöst wird.After completion of the hole, the
Claims (17)
- A method for drilling, in particular impact drilling or rotary percussion drilling, a hole (7) in soil or rock material and fixing an anchorage in said hole, wherein a drill hole (7) is formed by means of a drill bit (1) mounted on a drill rod assembly (5) while simultaneously introducing a jacket tube (4) surrounding the drill rod assembly (5) in a spaced-apart manner, wherein the jacket tube (4) is introduced into the drill hole (7) by exerting a tensile stress via this coupling with the drill bit (1) characterized in that the jacket tube, which is formed with a longitudinal slot (8), is at least partially introduced in substantial abutment on the drill hole (7) during drilling.
- A method according to claim 1, characterized in that an expandable element (15, 17, 19) is introduced into the interior of the jacket tube (4), and expanded, upon completion of the drill hole (7) and removal of the drill rod assembly (5).
- A method according to claim 2, characterized in that the expandable element (15, 17, 19) is expanded by exerting an impact stress.
- A method according to any one of claims 1, 2 or 3, characterized in that the jacket tube (4) is introduced into the drill hole (7) by exerting an impact stress.
- A method according to any one of claims 1 to 4, characterized in that at least one connection provided along the substantially longitudinally slotted jacket tube (4) and defined by a predetermined breaking point (29) is separated upon completion of the bore (7).
- A method according to claim 5, characterized in that the separation or breaking of the predetermined breaking point (29) is effected by a slight retraction of at least the impact shoe (3) and jacket tube (4) mounted thereon as well as an actuation of the impact shoe (3).
- A method according to any one of claims 1 to 6, characterized in that a curing mass is filled into the interior of the jacket tube (4) in a manner known per se upon completion of the bore (7).
- A device for drilling, in particular impact drilling or rotary percussion drilling, holes (7) in soil or rock material and producing an anchorage, wherein a drill bit (1) mounted on a drill rod assembly (5) makes a drill hole (7) and a jacket tube (4) surrounding the drill rod assembly (5) in a spaced-apart manner and following the drill bit (1) and being coupled therewith is provided, wherein the jacket tube (4) is introduced into the drill hole (7) by exerting a tensile stress via this coupling with the drill bit (1), characterized in that the jacket tube (4) comprises a longitudinal slot (8) substantially extending in the longitudinal direction of the jacket tube (4) .
- A device according to claim 8, characterized in that an expandable element (15, 17, 19) is introducible into the interior of the jacket tube (4) and expandable in abutment on the inner wall of the jacket tube (4) upon completion of the drill hole (7) and removal of the drill rod assembly (5).
- A device according to claim 9, characterized in that the expandable element (15) is comprised of a sleeve (17) which is expandable by an impact stress caused by the introduction of an especially conical element (19).
- A device according to claim 9 or 19, characterized in that the jacket tube (4) on its inner wall is provided with elevations or projections (20) aimed to position the expandable element (15, 17, 19).
- A device according to any one of claims 8 to 11, characterized in that the jacket tube (4) comprises at least one predetermined breaking point (29) along its longitudinal slot extending substantially in the longitudinal direction of the jacket tube (4).
- A device according to claim 12, characterized in that the at least one predetermined breaking point (19) provided along the longitudinal slot (8) of the jacket tube (4) is formed by a weld bridging the longitudinal slot (8).
- A device according to any one of claims 8 to 13, characterized in that the jacket tube (4), on its end facing the drill bit (1), is fixed to an impact shoe (3) of the drill bit (1).
- A device according to any one of claims 8 to 14, characterized in that the jacket tube (4) is made of a prestressed material, in particular metal.
- A device according to any one of claims 8 to 15, characterized in that at least upon completion of the drill hole (7) an anchoring plate (13) is fixable to the jacket tube (4) on its end projecting out of the soil or rock material.
- A device according to any one of claims 8 to 16, characterized in that the jacket tube (4), in the region of its end following the drill bit (1), in a manner known per se comprises at least one passage opening aimed to introduce the excavated soil or rock material into the interior of the jacket tube (4).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200230409T SI1381756T2 (en) | 2001-04-26 | 2002-04-23 | Method and device for drilling a hole and for securing an anchorage in a bore hole |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0032701U AT5644U1 (en) | 2001-04-26 | 2001-04-26 | METHOD AND DEVICE FOR DRILLING A HOLE AND DETERMINING AN ANCHOR IN A DRILL HOLE |
AT3272001U | 2001-04-26 | ||
AT5372002 | 2002-04-05 | ||
AT5372002 | 2002-04-05 | ||
PCT/AT2002/000120 WO2002088523A1 (en) | 2001-04-26 | 2002-04-23 | Method and device for drilling a hole and for securing an anchorage in a bore hole |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1381756A1 EP1381756A1 (en) | 2004-01-21 |
EP1381756B1 EP1381756B1 (en) | 2006-07-05 |
EP1381756B2 true EP1381756B2 (en) | 2010-03-24 |
Family
ID=25592329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02766568A Expired - Lifetime EP1381756B2 (en) | 2001-04-26 | 2002-04-23 | Method and device for drilling a hole and for securing an anchorage in a bore hole |
Country Status (23)
Country | Link |
---|---|
US (1) | US7080697B2 (en) |
EP (1) | EP1381756B2 (en) |
JP (1) | JP4036756B2 (en) |
KR (1) | KR100779340B1 (en) |
CN (1) | CN100356035C (en) |
AT (1) | ATE332436T1 (en) |
AU (1) | AU2002338538B2 (en) |
CA (1) | CA2442320C (en) |
CY (1) | CY1106519T1 (en) |
CZ (1) | CZ301100B6 (en) |
DE (1) | DE50207438D1 (en) |
DK (1) | DK1381756T3 (en) |
ES (1) | ES2262838T5 (en) |
HK (1) | HK1066581A1 (en) |
HR (1) | HRP20030813A2 (en) |
HU (1) | HUP0303931A3 (en) |
PL (1) | PL197261B1 (en) |
PT (1) | PT1381756E (en) |
RU (1) | RU2278941C2 (en) |
SI (1) | SI1381756T2 (en) |
SK (1) | SK286790B6 (en) |
TW (1) | TW530113B (en) |
WO (1) | WO2002088523A1 (en) |
Cited By (3)
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DE102011120572A1 (en) | 2011-01-27 | 2012-08-02 | Minova International Ltd. | Drilling device for impact or rotary impact drilling with connecting sleeve |
DE102012000983A1 (en) | 2012-01-20 | 2013-07-25 | Minova International Ltd. | Device for a drainage drilling system |
AT525566B1 (en) * | 2021-11-17 | 2023-05-15 | Dsi Underground Austria Gmbh | SENSOR-BASED HOLLOW ROD SYSTEM |
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DE10219155C1 (en) * | 2002-04-29 | 2003-12-18 | Welser Profile Ag | A metal mining plug |
SE526132C2 (en) * | 2003-11-13 | 2005-07-12 | Atlas Copco Rock Drills Ab | Method and apparatus for installing a self-drilling expandable rock bolt and a self-drilling expandable rock bolt |
SE529459C2 (en) * | 2004-03-10 | 2007-08-14 | Sandvik Intellectual Property | Drilling equipment |
AT509159B1 (en) * | 2004-03-23 | 2011-09-15 | Alwag Tunnelausbau Gmbh | METHOD AND DEVICE FOR DRILLING, IN PARTICULAR FITTING OR TORQUE DRILLING, A HOLE IN GROUND OR ROCK MATERIAL AND FOR FORMING AN ANCHORAGE IN THE HOLE |
AT501875B1 (en) | 2005-06-07 | 2008-05-15 | Alwag Tunnelausbau Gmbh | METHOD AND DEVICE FOR DRILLING, IN PARTICULAR FITTING OR TURNING OF A HOLE IN GROUND OR ROCK MATERIAL |
US7404453B2 (en) * | 2006-03-07 | 2008-07-29 | Boys Donald R | Method and apparatus for forming square holes for posts |
FI122034B (en) * | 2006-10-03 | 2011-07-29 | Turun Ammattikorkeakoulu | Method for drilling a hole |
WO2008100195A1 (en) | 2007-02-14 | 2008-08-21 | Sandvik Intellectual Property Ab | Tool |
CL2011002065A1 (en) * | 2011-08-23 | 2011-10-28 | Fortification system that simultaneously performs the drilling and installation of friction fortification bolts for the maintenance of land, in the process of drilling and installing the friction bolt, the cylinder head or adapter and the drilling bar are recovered, losing only the drill bit in charge of breaking the rocky mace. | |
WO2015044940A1 (en) * | 2013-09-29 | 2015-04-02 | Lev Dror | Apparatus and method for installing an anchor within a base material |
GB201513485D0 (en) * | 2015-07-30 | 2015-09-16 | Ihc Engineering Business Ltd | Anchoring device and method |
AU2015255248B2 (en) * | 2015-11-12 | 2021-05-13 | Jusand Nominees Pty Ltd | Safety system and method for protecting against a hazard of drill rod failure in a drilled rock bore |
CN106223857B (en) * | 2016-08-24 | 2018-09-04 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of continuous circulator of casing job and method |
CN110307003B (en) * | 2019-08-12 | 2024-04-12 | 中铁二院工程集团有限责任公司 | Pressure relief pilot tunnel suitable for preventing tunnel bottom from deforming and construction method thereof |
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2002
- 2002-04-23 CZ CZ20032893A patent/CZ301100B6/en not_active IP Right Cessation
- 2002-04-23 KR KR1020037013989A patent/KR100779340B1/en not_active IP Right Cessation
- 2002-04-23 WO PCT/AT2002/000120 patent/WO2002088523A1/en active IP Right Grant
- 2002-04-23 RU RU2003134238/03A patent/RU2278941C2/en not_active IP Right Cessation
- 2002-04-23 ES ES02766568T patent/ES2262838T5/en not_active Expired - Lifetime
- 2002-04-23 DK DK02766568T patent/DK1381756T3/en active
- 2002-04-23 AT AT02766568T patent/ATE332436T1/en active
- 2002-04-23 EP EP02766568A patent/EP1381756B2/en not_active Expired - Lifetime
- 2002-04-23 DE DE50207438T patent/DE50207438D1/en not_active Expired - Lifetime
- 2002-04-23 JP JP2002585789A patent/JP4036756B2/en not_active Expired - Fee Related
- 2002-04-23 AU AU2002338538A patent/AU2002338538B2/en not_active Ceased
- 2002-04-23 CA CA002442320A patent/CA2442320C/en not_active Expired - Lifetime
- 2002-04-23 SI SI200230409T patent/SI1381756T2/en unknown
- 2002-04-23 SK SK1331-2003A patent/SK286790B6/en not_active IP Right Cessation
- 2002-04-23 PT PT02766568T patent/PT1381756E/en unknown
- 2002-04-23 CN CNB028084314A patent/CN100356035C/en not_active Expired - Fee Related
- 2002-04-23 HU HU0303931A patent/HUP0303931A3/en unknown
- 2002-04-23 PL PL365943A patent/PL197261B1/en unknown
- 2002-04-26 TW TW091108635A patent/TW530113B/en not_active IP Right Cessation
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2003
- 2003-10-09 HR HR20030813A patent/HRP20030813A2/en not_active Application Discontinuation
- 2003-10-27 US US10/692,812 patent/US7080697B2/en not_active Expired - Fee Related
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2004
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011120572A1 (en) | 2011-01-27 | 2012-08-02 | Minova International Ltd. | Drilling device for impact or rotary impact drilling with connecting sleeve |
DE102012000983A1 (en) | 2012-01-20 | 2013-07-25 | Minova International Ltd. | Device for a drainage drilling system |
AT525566B1 (en) * | 2021-11-17 | 2023-05-15 | Dsi Underground Austria Gmbh | SENSOR-BASED HOLLOW ROD SYSTEM |
AT525566A4 (en) * | 2021-11-17 | 2023-05-15 | Dsi Underground Austria Gmbh | SENSOR-BASED HOLLOW ROD SYSTEM |
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