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EP2094933B1 - Device for percussion drilling or rotary percussion drilling in rocky material - Google Patents

Device for percussion drilling or rotary percussion drilling in rocky material Download PDF

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Publication number
EP2094933B1
EP2094933B1 EP07845268A EP07845268A EP2094933B1 EP 2094933 B1 EP2094933 B1 EP 2094933B1 EP 07845268 A EP07845268 A EP 07845268A EP 07845268 A EP07845268 A EP 07845268A EP 2094933 B1 EP2094933 B1 EP 2094933B1
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EP
European Patent Office
Prior art keywords
cladding tube
section
drilling rod
recesses
percussion drilling
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.)
Not-in-force
Application number
EP07845268A
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German (de)
French (fr)
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EP2094933A1 (en
Inventor
Josef Mocivnik
Rene Egger-Mocivnik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Techmo Entwicklungs und Vertriebs GmbH
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Techmo Entwicklungs und Vertriebs GmbH
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Publication of EP2094933A1 publication Critical patent/EP2094933A1/en
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Publication of EP2094933B1 publication Critical patent/EP2094933B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/08—Casing joints
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems

Definitions

  • the invention relates to a device for impact or rotary impact drilling in rock material, arranged with a percussion drill string and the diameter of the Schlagbohrgestfites with its diameter exceeding drill bit, the percussion linkage arranged in the axial direction one behind the other and connected by means of a respective sleeve sleeve sections and from a Hüllrohr is surrounded, in the axial direction successively arranged Hüllrohrabête that are secured against rotation, has.
  • a device of this type is known, for example from the WO 00/11302 or from the AT 006969 U2 .
  • Devices of this type allow not only a pure drilling, but also a percussion or rotary impact drilling, as well as a drainage of boreholes and also the creation of anchors, in which case the drill bit is preferably designed as a disposable drill bit.
  • the drill bit is preferably designed as a disposable drill bit.
  • rinsing agent fed directly over the drill bit of the forehead of the well, which promotes flushing mined material through the openings in the present between the drill string and the cladding cavity, through which cavity the drilling material discharged from the wellbore becomes.
  • a drainage or drainage of the borehole can take place.
  • each Hüllrohrabêt is applied individually via the drill string, by means of the sleeve which is attached to the bearing sleeve of the subsequent Hüllrohrabiteses, occurring with the impact drilling forces occurring during impact drilling, so that these forces are not transmitted from Hüllrohrabêt to Hüllrohrabrough.
  • the Hüllrohrabitese are thus of deformations that could cause these feed forces, kept free, which is essential for the proper functioning of the cladding tube, namely the removal of the mined drilling material and the storage of the drill string.
  • the length of the drill pipe sections from sleeve to sleeve dimensioned by an amount of 0.1 to 0.5 mm larger than the length of a Hüllrohraboughes.
  • a preferred embodiment is characterized in that between the SchlagbohrgestCode and the cladding tube a cavity is provided, that the SchlagbohrgestShe is hollow and that the cladding tube is provided with a passage of the mined drilling material into the interior of the cladding tube permitting through openings, wherein the cladding tube with two or more distributed around the circumference and directed against the percussion linkage and is provided over its length extending recoveries, which recoveries have the openings.
  • the cladding tube gets a particularly high stability, so that for the cladding tube with a small wall thickness Aus Siemens is found.
  • the recoveries additionally cause a targeted reduction in cross-section for the effluent flushing agent or the drainage water, which leads to an increase in the flow rate and thus to a much more efficient application of the mined drilling material.
  • the passage openings are provided on the drill rod nearest the base of the individual calibrations, expediently a plurality of passage openings in the longitudinal direction of the cladding tube are arranged one behind the other.
  • the passage openings are formed as longitudinal slots, preferably each two longitudinal slots are provided side by side to form a thin intermediate web, which embodiment offers the advantage that it comes during drilling, especially during rotational impact drilling, to vibrate the intermediate webs, so that the Cuttings pass through the passages particularly easily and cause no congestion on these.
  • a plug connection for connecting a further Hüllrohrabiteses is provided at the end of a Hüllrohrabiteses, wherein the plug connection is provided on the Hüllrohrabêt outside in the field of confiscation.
  • the connector is formed on the one hand by a provided on a Hüllrohrabêt sleeve and on the other hand provided by an adjacent Hüllrohrabsacrificing, insertable into the sleeve bolts.
  • the outer circumference of the cladding tube is circular in cross section and the recesses in the cross section are at least partially circular in shape.
  • a further expedient embodiment is characterized in that the outer circumference of the cladding tube is circular in cross-section and the recesses in the cross-section are V-shaped.
  • four recesses are arranged distributed uniformly over the circumference of the cladding tube, expediently provided for each cladding tube section two plug-in connections on diametrically opposite recesses.
  • At least one jacket tube section without passage openings is provided on the daylight side or on the air side.
  • a sealing sleeve which seals the drilled hole between the drilled hole wall and the cladding tube.
  • Fig. 1 shows an axial longitudinal section through a device according to the invention, which according to the line II of Fig. 2 an end view in the direction of arrow II of Fig. 1 shows, is guided.
  • Fig. 3 shows a side view of a device according to the invention in a drill hole shown cut.
  • Fig. 4 illustrated in Schrägrissdarwolf parts of the device according to the invention in an exploded view.
  • the Fig. 5a and 5b show a cross section through a cladding tube in different positions in the room as well as taking place in the cladding tube detergent flush.
  • the 6 and 7 also show cross sections through a cladding tube according to different Asus Entrysformen and Fig. 8 shows a part of a Hüllrohrabterrorismes with a variation of the openings.
  • Fig. 1 carries a hollow drill pipe 1, which is designed as Schlagbohrgestnaturee, frontally a drill bit 2, which is provided with through holes 3, which emanate from the cavity 4 of the drill string 1 and the outside of the drill bit 2, so that through the cavity 4 of Drill 1 supplied detergent 5 can escape directly from the drill bit 2 in the hole 6, which not only the mined drilling material can be removed from the drill bit 2, but also the drill bit 2 itself is cooled.
  • the drill pipe 1 is composed of individual drill pipe sections 7, which are connected by means of sleeves 8 in the axial direction one behind the other, for example, provided by between the ends of the drill pipe sections 7 and the sleeves 8 screw thread. 9
  • the drill string 1 is surrounded on the outside by a cladding tube 10, which is formed by Hüllrohrabêten 11, which are provided one behind the other in the axial direction.
  • Each cladding tube section 11 has a circular cross-section which is interrupted by recesses 12, which are directed approximately radially to the central axis of the cladding tube sections 11.
  • These recoveries 12 can, in particular the FIGS. 5, 6 and 7 show, in cross-section semicircular or three-quarter circular or V-shaped design. Of course, U-shaped cross sections or other functionally identical cross sections for the recoveries 12 are conceivable.
  • These recoveries 12 are not quite enough to the outside of the drill pipe 1, but up to the drill pipe 1 in the cladding tube 10 centering bearing sleeves 13 which are rotatably connected to a respective Hüllrohrabêt 11.
  • Hüllrohrabitese 11 are equal to each other, as well as the lengths of the drill pipe sections 7 are equal to each other - with the exception of the drill head supporting drill pipe section, which protrudes for attachment of the drill bit 2 on the first Hüllrohrabites 11, the so-called beginner element.
  • This novice element 11 has at both ends a bearing sleeve 13, the remaining Hüllrohrabête 11 only at the rear end.
  • one drill pipe section 7 and, at the same time, a casing pipe section 11 are to be connected to the device already in the borehole 6.
  • the connecting the drill pipe sections 7 sockets 8 are slightly smaller in diameter than the Außern oncemesser the bearing sleeves 13 so that between each sleeve 8 and the sheath 10 is always a game and the drill pipe 1 is centered exclusively on the bearing sleeves 13 relative to the cladding tube 10.
  • the Hüllrohrabête 11 are secured against rotation against each other, preferably by means of a connector 14.
  • a connector 14 This is according to a particularly advantageous embodiment of a arranged at one end of a Hüllrohrabêtes 11 sleeve 15 and arranged at the end of the adjacent Hüllrohrabêtes 11 bolt 16, in the sleeve 15 can be used formed.
  • This bolt 16 is how out Fig. 1 can be seen, formed hollow.
  • the connectors are housed in the recoveries 12, so that the circular outer cross section of the cladding tube 10 is not surmounted.
  • two plug connections are provided at each end of the Hüllrohrabête, preferably diametrically to the longitudinal axis of the drill string 1.
  • the hollow Europedes bolt allows the passage of detergent or drainage water from a Hüllrohrabêt 11 to the next, so that the detergent flow along several Hüllrohrabête in the recoveries can.
  • passage openings 17 are provided to the cuttings or degraded drilling material - especially the drilling dust - in the interior of the cladding tube 10, in the between Cladding tube 10 and the drill pipe 1 existing cavity 18 to enter.
  • the passage openings 17 are formed as longitudinal slots, wherein each two of these longitudinal slots 17 are provided side by side to form a thin web 19.
  • the passage openings 17 develop a self-cleaning effect, so a clogging of the openings 17 can be largely avoided:
  • the passage openings 17 may also have other cross-sections. Cuttings with a slightly coarser grain passes primarily through the mutually aligned recoveries 12 from the borehole. 6
  • the Hüllrohrabitese 11 may also be provided on the outer circumference with perforations through which water can penetrate into the cavity 18.
  • Fig. 4 can be seen that cuttings also on the front side of the beginner element in the spaces between the Recoveries 12 can penetrate, since the drill bit 2 at herere back has a substantially smaller diameter than the cladding tube 10th
  • Fig. 1 Furthermore, it can be seen that the sleeves 8 of the drill string sections 7 come to rest with their front side on the end face of the bearing sleeves 13, but in each case the rear end face of a covering tube section 11 comes to lie at a distance of 20 with the end face of the subsequently arranged covering tube section.
  • the length L 1 of sleeve 8 to sleeve 8 is dimensioned slightly larger than the length L 2 of the Hüllrohrabismee 11, by 0.1 to 1.5 mm, preferably by 0.1 to 0.5 mm.
  • the Hüllrohrabroughe 11 which have a particular stability and rigidity by the recoveries 12, are designed very thin-walled; the loading of the Hüllrohrabroughe 11 by impacts in the axial direction, as stated above, not on the thin wall of the Hüllrohrabête 11, but on the fixedly connected to the respective Hüllrohrabrough 11 bearing bushing 13, against which the end face of the adjacent sleeve 8 beats.
  • the cladding tube 10 can also be formed from a less solid material such as aluminum (eg as an extruded profile). Also wells of great depth up to 50m and above can be easily made.
  • the taglicht masse or air-side end portion 21 of the device has Hüllrohrabitese 11, which have no openings 17.
  • the number of provided with openings 17 Hüllrohrabête 11 depends entirely on the local requirements of the rock.
  • a hole 6 closing sealing sleeve 22 is provided between the last arranged Hüllrohrabites 11 and the borehole wall.
  • Fig. 5a and 5b show the entry of detergent 5 and drainage water into the interior of the cladding tube 10 and illustrate the Querschittsverengung the channels formed by the drawbacks 12 for the draining rinsing 5 and drainage water channels, which cross-sectional constrictions significantly increase the flow rate of the detergent 5 and the drainage water and thus ensuring a better discharge of the cuttings.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Lubricants (AREA)
  • Led Devices (AREA)

Abstract

The invention relates to a device for percussion drilling or rotary percussion drilling in rocky material, said device comprising a drill bit (2) arranged on a percussion drill column (1). The percussion drill column (1) comprises drill column sections (7) which are arranged one behind the other in the axial direction and are respectively interconnected by a bushing (8), and is surrounded by a jacket tube (10) comprising jacket tube sections (11) arranged one behind the other in the axial direction. In order to avoid heavy loads during the axial advancement of the jacket tube sections, the device is characterised by the combination of the following elements: each drill column section (7) is mounted in such a way that it can be rotated in relation to a jacket tube section (11) by means of at least one bearing sleeve (13) fixed to the jacket tube section (11); each bushing (8) comes into contact with a bearing sleeve (13) upon an impact of the percussion drill column (1); and the length (L1) of the percussion drill column (1) from bushing (8) to bushing (8) is designed in such a way as to be slightly longer than the length (L2) of a jacket tube section (11), creating a space (20) between adjacent jacket tube sections (11).

Description

Die Erfindung betrifft eine Vorrichtung zum Schlag- bzw. Drehschlagbohren in Gesteinsmaterial, mit einer an einem Schlagbohrgestänge angeordneten und den Durchmesser des Schlagbohrgestänges mit ihrem Durchmesser übersteigenden Bohrkrone, wobei das Schlagbohrgestänge in Achsrichtung hintereinander angeordnete und miteinander mittels jeweils einer Muffe verbundene Bohrgestängeabschnitte aufweist und von einem Hüllrohr umgeben ist, das in Achsrichtung hintereinander angeordnete Hüllrohrabschnitte, die gegeneinander gegen Verdrehen gesichert sind, aufweist.The invention relates to a device for impact or rotary impact drilling in rock material, arranged with a percussion drill string and the diameter of the Schlagbohrgestänges with its diameter exceeding drill bit, the percussion linkage arranged in the axial direction one behind the other and connected by means of a respective sleeve sleeve sections and from a Hüllrohr is surrounded, in the axial direction successively arranged Hüllrohrabschnitte that are secured against rotation, has.

Eine Vorrichtung dieser Art ist beispielsweise bekannt aus der WO 00/11302 oder aus der AT 006969 U2 . Vorrichtungen dieser Art ermöglichen nicht nur ein reines Bohren, sondern auch ein Schlag- oder Drehschlagbohren, sowie ein Drainagieren von Bohrlöcher und auch das Erstellen von Verankerungen, in welchem Fall die Bohrkrone vorzugsweise als Einwegbohrkrone ausgebildet ist. Hierbei wird über ein Bohrgestänge, welches die Bohrkrone trägt, Spülmittel unmittelbar über die Bohrkrone der Stirn des Bohrloches zugeleitet, welches Spülmittel abgebautes Bohrmaterial über die Durchtrittsöffnungen in den zwischen dem Bohrgestänge und dem Hüllrohr vorhandenen Hohlraum fördert, durch welchen Hohlraum das Bohrmaterial aus dem Bohrloch ausgefördert wird. Dabei kann auch eine Entwässerung bzw. Drainagierung des Bohrloches stattfinden.A device of this type is known, for example from the WO 00/11302 or from the AT 006969 U2 , Devices of this type allow not only a pure drilling, but also a percussion or rotary impact drilling, as well as a drainage of boreholes and also the creation of anchors, in which case the drill bit is preferably designed as a disposable drill bit. In this case, via a drill string, which carries the drill bit, rinsing agent fed directly over the drill bit of the forehead of the well, which promotes flushing mined material through the openings in the present between the drill string and the cladding cavity, through which cavity the drilling material discharged from the wellbore becomes. In this case, a drainage or drainage of the borehole can take place.

Aus dem Dokument WO 98/21439 A ist eine Vorrichtung zum Schlag- bzw. Drehschlagbohren in Gesteinsmaterial, mit einer an einem Schlagbohrgestänge angeordneten und den Durchmesser des Schlagbohrgestänges mit ihrem Durchmesser übersteigenden Bohrkrone, bekannt, wobei das Schlagbohrgestänge von einem Hüllrohr umgeben ist, das in Achsrichtung hintereinander angeordnete Hüllrohrabschnitte, die gegeneinander gegen Verdrehen gesichert sind, aufweist.From the document WO 98/21439 A is a device for impact or rotary impact drilling in rock, with a arranged on a percussion linkage and the diameter of the Schlagbohrgestänges exceeding with its diameter drill bit known, the Schlagbohrgestänge is surrounded by a cladding tube, the axially successively arranged Hüllrohrabschnitte against each other against Twisting are secured has.

Eine wesentliche Anforderung an eine Vorrichtung der eingangs beschriebenen Art ist neben einer zuverlässigen Spülmittel- bzw. Wasserabfuhr sowie einer zuverlässigen Abfuhr des abgebauten Bohrmaterials, d.h. des Bohrkleins, darin zu sehen, das Hüllrohr, das aus Kostengründen möglichst dünnwandig sein soll, vor Verformungen und Belastungen zu schützen und trotzdem auch bei großen Bohrlochlängen zuverlässig entsprechend dem Bohrfortgang nachzusetzen.An essential requirement of a device of the type described above, in addition to a reliable Spülmittel- or water removal and reliable removal of the mined drilling material, ie the cuttings to see it, the cladding tube, which should be as thin as possible for cost reasons, before deformation and stress to protect and yet nachsetzen even with large drill hole lengths reliably according to the drilling progress.

Diese Aufgabe wird erfingdungsgemäß durch die Kombination folgender Merkmale gelöst:

  • dass jeweils ein Bohrgestängeabschnitt gegenüber einem Hüllrohrabschnitt mittels mindestens einer am Hüllrohrabschnitt fixierten Lagerhülse drehbar gelagert ist,
  • wobei jeweils eine Muffe an jeweils einer Lagerhülse bei Durchführung eines Schlages des Schlagbohrgestänges zur Anlage gelangt und
  • die Länge des Schlagbohrgestänges von Muffe zu Muffe geringfügig größer bemessen ist als die Länge eines Hüllrohrabschnittes, wobei zwischen benachbarten Hüllrohrabschnitten eine Distanz vorhanden ist.
This object is achieved according to the invention by the combination of the following features:
  • that in each case a drill pipe section is rotatably mounted relative to a casing pipe section by means of at least one bearing sleeve fixed to the casing pipe section,
  • wherein in each case a sleeve on each bearing sleeve when performing a blow of Schlagbohrgestänges comes to rest and
  • the length of Schlagborhrgestänges from sleeve to sleeve is dimensioned slightly larger than the length of a Hüllrohrabschnittes, wherein between adjacent Hüllrohrabschnitten a distance is present.

Hierdurch wird jeder Hüllrohrabschnitt für sich einzeln über das Bohrgestänge, und zwar mittels der Muffe, die an der Lagerhülse des nachfolgenden Hüllrohrabschnittes befestigt ist, mit den beim Schlagbohren auftretenden Vorschubkräften beaufschlagt, sodass diese Kräfte nicht von Hüllrohrabschnitt zu Hüllrohrabschnitt übertragen werden. Die Hüllrohrabschnitte sind dadurch von Verformungen, die diese Vorschubkräfte bewirken könnten, freigehalten, was für die einwandfreie Funktion des Hüllrohres, nämlich das Abführen des abgebauten Bohrmaterials sowie die Lagerung des Bohrgestänges, wesentlich ist.As a result, each Hüllrohrabschnitt is applied individually via the drill string, by means of the sleeve which is attached to the bearing sleeve of the subsequent Hüllrohrabschnittes, occurring with the impact drilling forces occurring during impact drilling, so that these forces are not transmitted from Hüllrohrabschnitt to Hüllrohrabschnitt. The Hüllrohrabschnitte are thus of deformations that could cause these feed forces, kept free, which is essential for the proper functioning of the cladding tube, namely the removal of the mined drilling material and the storage of the drill string.

Vorzugsweise ist die Länge der Bohrgestängeabschnitte von Muffe zu Muffe um einen Betrag von 0,1 bis 0,5 mm größer bemessen als die Länge eines Hüllrohrabschnittes.Preferably, the length of the drill pipe sections from sleeve to sleeve dimensioned by an amount of 0.1 to 0.5 mm larger than the length of a Hüllrohrabschnittes.

Eine bevorzugte Ausführungsform ist dadurch gekennzeichnet, dass zwischen dem Schlagbohrgestänge und dem Hüllrohr ein Hohlraum vorgesehen ist, dass das Schlagbohrgestänge hohl ausgebildet ist und dass das Hüllrohr mit einen Durchtritt des abgebauten Bohrmaterials in das Innere des Hüllrohres ermöglichenden Durchtrittsöffnungen versehen ist, wobei das Hüllrohr mit zwei oder mehreren am Umfang verteilt angeordneten und gegen das Schlagbohrgestänge gerichteten sowie sich über seine Länge erstreckenden Einziehungen versehen ist, welche Einziehungen die Durchtrittsöffnungen aufweisen.A preferred embodiment is characterized in that between the Schlagbohrgestänge and the cladding tube a cavity is provided, that the Schlagbohrgestänge is hollow and that the cladding tube is provided with a passage of the mined drilling material into the interior of the cladding tube permitting through openings, wherein the cladding tube with two or more distributed around the circumference and directed against the percussion linkage and is provided over its length extending recoveries, which recoveries have the openings.

Durch die sich in Längsrichtung erstreckenden Einziehungen des Hüllrohres bekommt das Hüllrohr eine besonders große Stabilität, sodass für das Hüllrohr mit einer geringen Wandstärke das Auslangen gefunden wird. Die Einziehungen bewirken jedoch zusätzlich noch eine gezielte Querschnittsverminderung für das abfließende Spülmittel beziehungsweise das Drainagewasser, wodurch es zu einer Erhöhung der Fließgeschwindigkeit und damit zu einem wesentlich effizienteren Ausbringen des abgebauten Bohrmaterials kommt.Due to the longitudinally extending recoveries of the cladding tube, the cladding tube gets a particularly high stability, so that for the cladding tube with a small wall thickness Auslangen is found. However, the recoveries additionally cause a targeted reduction in cross-section for the effluent flushing agent or the drainage water, which leads to an increase in the flow rate and thus to a much more efficient application of the mined drilling material.

Zweckmäßig erstrecken sich die Einziehungen in radialer Richtung bis zu den Lagerhülsen und sind diese an den Einziehungen fixiert.Appropriately extend the recoveries in the radial direction up to the bearing sleeves and these are fixed to the recoveries.

Um einen guten Zutritt des abgebauten Bohrmaterials - insbesondere des Bohrmehls - zu den Durchtrittsöffnungen zu ermöglichen, sind die Durchtrittsöffnungen an dem dem Bohrgestänge nächstliegenden Grund der Einzichungen vorgesehen, wobei zweckmäßig eine Mehrzahl von Durchtrittsöffnungen in Längsrichtung des Hüllrohres hintereinander liegend angeordnet sind.In order to allow good access of the mined boring material - in particular of the drilling dust - to the passage openings, the passage openings are provided on the drill rod nearest the base of the individual calibrations, expediently a plurality of passage openings in the longitudinal direction of the cladding tube are arranged one behind the other.

Gemäß einer bevorzugten Ausführungsform sind die Durchtrittsöffnungen als Längsschlitze ausgebildet, wobei vorzugsweise jeweils zwei Längsschlitze unter Bildung eines dünnen Zwischensteges nebeneinander liegend vorgesehen sind, welche Ausführungsform den Vorteil bietet, dass es beim Bohren, insbesondere beim Drehschlagbohren, zu einem Vibrieren der Zwischenstege kommt, sodass das Bohrklein besonders leicht durch die Durchtrittsöffnungen durchtritt und an diesen keinen Stau verursacht.According to a preferred embodiment, the passage openings are formed as longitudinal slots, preferably each two longitudinal slots are provided side by side to form a thin intermediate web, which embodiment offers the advantage that it comes during drilling, especially during rotational impact drilling, to vibrate the intermediate webs, so that the Cuttings pass through the passages particularly easily and cause no congestion on these.

Vorteilhaft ist endseitig eines Hüllrohrabschnittes eine Steckverbindung zum Anschluss eines weiteren Hüllrohrabschnittes vorgesehen, wobei die Steckverbindung am Hüllrohrabschnitt außenseitig im Bereich der Einziehung vorgesehen ist. Zweckmäßig ist die Steckverbindung einerseits von einer an einem Hüllrohrabschnitt vorgesehenen Hülse und andererseits von einem am benachbarten Hüllrohrabschnitt vorgesehenen, in die Hülse einsetzbaren Bolzen gebildet.Advantageously, a plug connection for connecting a further Hüllrohrabschnittes is provided at the end of a Hüllrohrabschnittes, wherein the plug connection is provided on the Hüllrohrabschnitt outside in the field of confiscation. Suitably, the connector is formed on the one hand by a provided on a Hüllrohrabschnitt sleeve and on the other hand provided by an adjacent Hüllrohrabschnitt, insertable into the sleeve bolts.

Gemäß einer zweckmäßigen Ausführungsform ist der Außenumfang des Hüllrohres im Querschnitt kreisförmig und sind die Einziehungen im Querschnitt zumindest teilkreisförmig gestaltet.According to an expedient embodiment, the outer circumference of the cladding tube is circular in cross section and the recesses in the cross section are at least partially circular in shape.

Eine weitere zweckmäßige Ausführungsform ist dadurch gekennzeichnet, dass der Außenumfang des Hüllrohres im Querschnitt kreisförmig ist und die Einziehungen im Querschnitt V-förmig gestaltet sind.A further expedient embodiment is characterized in that the outer circumference of the cladding tube is circular in cross-section and the recesses in the cross-section are V-shaped.

Vorteilhaft sind vier Einziehungen über den Umfang des Hüllrohres gleichmäßig verteilt angeordnet, wobei zweckmäßig je Hüllrohrabschnitt zwei Steckverbindungen an einander diametral gegenüberliegenden Einziehungen vorgesehen sind.Advantageously, four recesses are arranged distributed uniformly over the circumference of the cladding tube, expediently provided for each cladding tube section two plug-in connections on diametrically opposite recesses.

Gemäß einer bevorzugten Ausführungsform ist taglichtseitig bzw. luftseitig zumindest ein Hüllrohrabschnitt ohne Durchtrittsöffnungen vorgesehen. Um ein Austreten von Spülmittel bzw. Drainagewasser außerhalb des Hüllrohrs aus dem Bohrloch zu vermeiden, ist zweckmäßig zwischen der Bohrlochwand und dem Hüllrohr eine das Bohrloch dichtende Dichtmanschettte vorgesehen.According to a preferred embodiment, on the daylight side or on the air side, at least one jacket tube section without passage openings is provided. In order to prevent leakage of detergent or drainage water outside of the cladding tube from the wellbore, it is expedient to provide a sealing sleeve which seals the drilled hole between the drilled hole wall and the cladding tube.

Die Erfindung ist nachfolgend anhand der Zeichnung an einigen Ausführungsbeispielen näher erläutert. Fig. 1 zeigt einen Achslängsschnitt durch eine erfindungsgemäße Vorrichtung, der gemäß der Linie I-I der Fig. 2, die eine Stirnansicht in Richtung des Pfeiles II der Fig. 1 zeigt, geführt ist. Fig. 3 zeigt eine Seitenansicht einer erfindungsgemäßen Vorrichtung in einem geschnitten dargestellten Bohrloch. Fig. 4 veranschaulicht in Schrägrissdarstellung Teile der erfindungsgemäßen Vorrichtung in Explosionsdarstellung. Die Fig. 5a und 5b zeigen einen Querschnitt durch ein Hüllrohr in unterschiedlichen Lagen im Raum sowie den im Hüllrohr stattfindenden Spülmittelabfluss. Die Fig. 6 und 7 zeigen ebenfalls Querschnitte durch ein Hüllrohr gemäß unterschiedlichen Asusführungsformen und Fig. 8 zeigt einen Teil eines Hüllrohrabschnittes mit einer Variation der Durchtrittsöffnungen.The invention is explained in more detail below with reference to the drawing in some embodiments. Fig. 1 shows an axial longitudinal section through a device according to the invention, which according to the line II of Fig. 2 an end view in the direction of arrow II of Fig. 1 shows, is guided. Fig. 3 shows a side view of a device according to the invention in a drill hole shown cut. Fig. 4 illustrated in Schrägrissdarstellung parts of the device according to the invention in an exploded view. The Fig. 5a and 5b show a cross section through a cladding tube in different positions in the room as well as taking place in the cladding tube detergent flush. The 6 and 7 also show cross sections through a cladding tube according to different Asusführungsformen and Fig. 8 shows a part of a Hüllrohrabschnittes with a variation of the openings.

Wie aus Fig. 1 zu ersehen ist, trägt ein hohles Bohrgestänge 1, das als Schlagbohrgestänge ausgebildet ist, stirnseitig eine Bohrkrone 2, die mit Durchgangsöffnungen 3, die vom Hohlraum 4 des Bohrgestänges 1 ausgehen und außenseitig der Bohrkrone 2 enden, versehen ist, sodass durch den Hohlraum 4 des Bohrgestänges 1 zugeführtes Spülmittel 5 direkt aus der Bohrkrone 2 in das Bohrloch 6 austreten kann, wodurch nicht nur das abgebaute Bohrmaterial von der Bohrkrone 2 entfernt werden kann, sondern auch die Bohrkrone 2 selbst gekühlt wird. Das Bohrgestänge 1 ist aus einzelnen Bohrgestängeabschnitten 7 zusammengesetzt, die mittels Muffen 8 in Achsrichtung hintereinander liegend miteinander verbunden sind, beispielsweise durch zwischen den Enden der Bohrgestängeabschnitte 7 und den Muffen 8 vorgesehene Schraubgewinde 9.How out Fig. 1 is to be seen, carries a hollow drill pipe 1, which is designed as Schlagbohrgestänge, frontally a drill bit 2, which is provided with through holes 3, which emanate from the cavity 4 of the drill string 1 and the outside of the drill bit 2, so that through the cavity 4 of Drill 1 supplied detergent 5 can escape directly from the drill bit 2 in the hole 6, which not only the mined drilling material can be removed from the drill bit 2, but also the drill bit 2 itself is cooled. The drill pipe 1 is composed of individual drill pipe sections 7, which are connected by means of sleeves 8 in the axial direction one behind the other, for example, provided by between the ends of the drill pipe sections 7 and the sleeves 8 screw thread. 9

Das Bohrgestänge 1 ist außenseitig von einem Hüllrohr 10 umgeben, das von Hüllrohrabschnitten 11, die in Achsrichtung hintereinander liegend vorgesehen sind, gebildet ist. Jeder Hüllrohrabschnitt 11 weist einen Kreisquerschnitt auf, der von Einziehungen 12, die etwa radial zur Mittelachse der Hüllrohrabschnitte 11 gerichtet sind, unterbrochen ist. Diese Einziehungen 12 können, wie insbesondere die Fig. 5, 6 und 7 zeigen, im Querschnitt halbkreis- oder dreiviertelkreisförmig oder auch V-förmig gestaltet sein. Selbstverständlich sind auch U-förmige Querschnitte oder auch andere funktionsgleiche Querschnitte für die Einziehungen 12 denkbar. Diese Einziehungen 12 reichen nicht ganz bis zur Außenseite des Bohrgestänges 1, sondern bis zu das Bohrgestänge 1 im Hüllrohr 10 zentrierenden Lagerhülsen 13, die mit jeweils einem Hüllrohrabschnitt 11 drehfest verbunden sind.The drill string 1 is surrounded on the outside by a cladding tube 10, which is formed by Hüllrohrabschnitten 11, which are provided one behind the other in the axial direction. Each cladding tube section 11 has a circular cross-section which is interrupted by recesses 12, which are directed approximately radially to the central axis of the cladding tube sections 11. These recoveries 12 can, in particular the FIGS. 5, 6 and 7 show, in cross-section semicircular or three-quarter circular or V-shaped design. Of course, U-shaped cross sections or other functionally identical cross sections for the recoveries 12 are conceivable. These recoveries 12 are not quite enough to the outside of the drill pipe 1, but up to the drill pipe 1 in the cladding tube 10 centering bearing sleeves 13 which are rotatably connected to a respective Hüllrohrabschnitt 11.

Die Längen der Hüllrohrabschnitte 11 sind untereinander gleich, ebenso wie die Längen der Bohrgestängeabschnitte 7 untereinander gleich bemessen sind - mit Ausnahme des den Bohrkopf tragenden Bohrgestängeabschnittes, der zur Befestigung der Bohrkrone 2 über den ersten Hüllrohrabschnitt 11, das sogenannte Anfängerelement, hinausragt. Dieses Anfängerelement 11 weist an beiden Enden eine Lagerhülse 13 auf, die übrigen Hüllrohrabschnitte 11 jeweils nur am hinteren Ende. Bei Fortschritt des Bohrens ist jeweils ein Bohrgestängeabschnitt 7 und gleichzeitig ein Hüllrohrabschnitt 11 an die bereits im Bohrloch 6 befindliche Vorrichtung anzuschließen.The lengths of Hüllrohrabschnitte 11 are equal to each other, as well as the lengths of the drill pipe sections 7 are equal to each other - with the exception of the drill head supporting drill pipe section, which protrudes for attachment of the drill bit 2 on the first Hüllrohrabschnitt 11, the so-called beginner element. This novice element 11 has at both ends a bearing sleeve 13, the remaining Hüllrohrabschnitte 11 only at the rear end. As the drilling progresses, one drill pipe section 7 and, at the same time, a casing pipe section 11 are to be connected to the device already in the borehole 6.

Die die Bohrgestängeabschnitte 7 verbindenden Muffen 8 sind im Durchmesser etwas geringer bemessen als der Außerndurchmesser der Lagerhülsen 13, sodass zwischen jeder Muffe 8 und dem Hüllrohr 10 stets ein Spiel vorhanden ist und das Bohrgestänge 1 ausschließlich über die Lagerhülsen 13 gegenüber dem Hüllrohr 10 zentriert ist.The connecting the drill pipe sections 7 sockets 8 are slightly smaller in diameter than the Außerndurchmesser the bearing sleeves 13 so that between each sleeve 8 and the sheath 10 is always a game and the drill pipe 1 is centered exclusively on the bearing sleeves 13 relative to the cladding tube 10.

Die Hüllrohrabschnitte 11 sind gegeneinander gegen Verdrehen gesichert, vorzugsweise mittels einer Steckverbindung 14. Diese ist gemäß einer besonders vorteilhaften Ausführungsform von einer an einem Ende eines Hüllrohrabschnittes 11 angeordneten Hülse 15 und von einem am Ende des benachbarten Hüllrohrabschnittes 11 angeordneten Bolzen 16, der in die Hülse 15 einsetzbar ist, gebildet. Dieser Bolzen 16 ist, wie aus Fig. 1 zu ersehen ist, hohl ausgebildet. Die Steckverbindungen sind in den Einziehungen 12 untergebracht, sodass der kreisförmige Außenquerschnitt des Hüllrohres 10 nicht überragt wird. Zur eindeutigen Drehsicherung sind an jedem Ende der Hüllrohrabschnitte zwei Steckverbindungen vorgesehen, vorzugsweise diametral zur Längsachse des Bohrgestänges 1. Die hohle Ausbildungdes Bolzens ermöglicht den Durchtritt von Spülmittel bzw. Drainagewasser von einem Hüllrohrabschnitt 11 zum nächsten, sodass das Spülmittel längs mehrerer Hüllrohrabschnitte in den Einziehungen fließen kann.The Hüllrohrabschnitte 11 are secured against rotation against each other, preferably by means of a connector 14. This is according to a particularly advantageous embodiment of a arranged at one end of a Hüllrohrabschnittes 11 sleeve 15 and arranged at the end of the adjacent Hüllrohrabschnittes 11 bolt 16, in the sleeve 15 can be used formed. This bolt 16 is how out Fig. 1 can be seen, formed hollow. The connectors are housed in the recoveries 12, so that the circular outer cross section of the cladding tube 10 is not surmounted. For unambiguous anti-rotation two plug connections are provided at each end of the Hüllrohrabschnitte, preferably diametrically to the longitudinal axis of the drill string 1. The hollow Ausbildungdes bolt allows the passage of detergent or drainage water from a Hüllrohrabschnitt 11 to the next, so that the detergent flow along several Hüllrohrabschnitte in the recoveries can.

Am Grund der Einziehungen 12, also in den Bereichen der Einziehungen 12, an denen diese achsnahe liegen, sind Durchtrittsöffnungen 17 vorgesehen, um das Bohrklein bzw. abgebaute Bohrmaterial - insbesondere das Bohrmehl - in das Innere des Hüllrohres 10, und zwar in den zwischen dem Hüllrohr 10 und dem Bohrgestänge 1 vorhandenen Hohlraum 18, eintreten zu lassen. Wie insbesondere Fig. 4 zeigt, sind die Durchtrittsöffnungen 17 als Längsschlitze ausgebildet, wobei jeweils zwei dieser Längsschlitze 17 nebeneinander liegend unter Bildung eines dünnen Steges 19 vorgesehen sind. Beim Bohren, insbesondere beim Drehschlagbohren, kommt es zu einem Vibrieren der Stege 19, wodurch die Durchtrittsöffnungen 17 eine selbstreinigende Wirkung entfalten, also ein Verstopfen der Durchtrittsöffnungen 17 weitestgehend vermieden werden kann: Wie insbesondere aus Fig. 8 zu erkennen ist, können die Durchtrittsöffnungen 17 jedoch auch andere Querschnitte aufweisen. Bohrklein mit etwas gröberem Korn gelangt in erster Linie über die fluchtend zueinander liegenden Einziehungen 12 aus dem Bohrloch 6.At the bottom of the recoveries 12, ie in the areas of the recoveries 12, in which these are close to the axis, passage openings 17 are provided to the cuttings or degraded drilling material - especially the drilling dust - in the interior of the cladding tube 10, in the between Cladding tube 10 and the drill pipe 1 existing cavity 18 to enter. In particular Fig. 4 shows, the passage openings 17 are formed as longitudinal slots, wherein each two of these longitudinal slots 17 are provided side by side to form a thin web 19. When drilling, especially during rotary impact drilling, there is a vibration of the webs 19, whereby the passage openings 17 develop a self-cleaning effect, so a clogging of the openings 17 can be largely avoided: As in particular from Fig. 8 can be seen, however, the passage openings 17 may also have other cross-sections. Cuttings with a slightly coarser grain passes primarily through the mutually aligned recoveries 12 from the borehole. 6

Die Hüllrohrabschnitte 11 können auch am Außenumfang mit Perforationen versehen sein, durch die Wasser in den Hohlraum 18 eindringen kann. Fig. 4 lässt erkennen, dass Bohrklein auch an der Stirnseite des Anfängerelements in die Zwischenräume zwischen den Einziehungen 12 eindringen kann, da die Bohrkrone 2 an ihrere Rückseite einen wesentlich kleineren Durchmesser aufweist als das Hüllrohr 10.The Hüllrohrabschnitte 11 may also be provided on the outer circumference with perforations through which water can penetrate into the cavity 18. Fig. 4 can be seen that cuttings also on the front side of the beginner element in the spaces between the Recoveries 12 can penetrate, since the drill bit 2 at herere back has a substantially smaller diameter than the cladding tube 10th

Fig. 1 lässt weiters erkennen, dass die Muffen 8 der Bohrgestängeabschnitte 7 mit ihrer Stirnseite an der Stirnseite der Lagerhülsen 13 zur Anlage gelangen, jedoch jeweils die rückwärtig Stirnseite eines Hüllrohrabschnittes 11 mit der Stirnseite des nachfolgend angeordneten Hüllrohrabschnittes in Distanz 20 zu liegen kommt. Die Länge L1 von Muffe 8 zu Muffe 8 ist geringfügig größer bemessen als die Länge L2 der Hüllrohrabschnitte 11, und zwar um 0,1 bis 1,5 mm, vorzugsweise um 0,1 bis 0,5 mm. Hierdurch ist sichergestellt, dass beim Schlag- bzw. beim Drehschlagbohren die Schläge bzw. das Vorrücken der Hüllrohrabschnitte 11 und des Bohrgestänges 1 nicht von Hüllrohrabschnitt 11 zu Hüllrohrabschnitt 11 übertragen werden, sondern von jeweils einer Muffe 8 auf nur einen einzigen nachfolgenden Hüllrohrabschnitt 11, nämlich jenen, an dessen Lagerbüchse 13 die jeweilige Muffe 8 zur Anlage gelangt. Dadurch können die Hüllrohrabschnitte 11, die durch die Einziehungen 12 eine besondere Stabilität und Steifigkeit aufweisen, sehr dünnwandig gestaltet werden; die Belastung der Hüllrohrabschnitte 11 durch Schläge in Achsrichtung erfolgt, wie oben dargelegt, nicht über die dünne Wand der Hüllrohrabschnitte 11, sondern über die mit dem jeweiligen Hüllrohrabschnitt 11 fest verbundene Lagerbüchse 13, gegen die die Stirnfläche der benachbarten Muffe 8 schlägt. Dies ermöglicht eine besonders leichte und besonders kostengünstige Konstruktion, wobei das Hüllrohr 10 auch aus einem weniger festen Material wie Aluminium (z.B. als Strangpressprofil) gebildet werden kann. Auch können Bohrlöcher großer Tiefe bis zu 50 m und darüber problemlos hergestellt werden. Fig. 1 Furthermore, it can be seen that the sleeves 8 of the drill string sections 7 come to rest with their front side on the end face of the bearing sleeves 13, but in each case the rear end face of a covering tube section 11 comes to lie at a distance of 20 with the end face of the subsequently arranged covering tube section. The length L 1 of sleeve 8 to sleeve 8 is dimensioned slightly larger than the length L 2 of the Hüllrohrabschnitte 11, by 0.1 to 1.5 mm, preferably by 0.1 to 0.5 mm. This ensures that the blows or the advance of the Hüllrohrabschnitte 11 and the drill string 1 are not transmitted from Hüllrohrabschnitt 11 to Hüllrohrabschnitt 11 during impact or rotational impact drilling, but of a respective sleeve 8 on only a single subsequent Hüllrohrabschnitt 11, namely those at the bearing bush 13, the respective sleeve 8 comes to rest. As a result, the Hüllrohrabschnitte 11, which have a particular stability and rigidity by the recoveries 12, are designed very thin-walled; the loading of the Hüllrohrabschnitte 11 by impacts in the axial direction, as stated above, not on the thin wall of the Hüllrohrabschnitte 11, but on the fixedly connected to the respective Hüllrohrabschnitt 11 bearing bushing 13, against which the end face of the adjacent sleeve 8 beats. This allows a particularly lightweight and particularly cost-effective construction, wherein the cladding tube 10 can also be formed from a less solid material such as aluminum (eg as an extruded profile). Also wells of great depth up to 50m and above can be easily made.

Der taglichtseitige oder luftseitige Endbereich 21 der Vorrichtung weist Hüllrohrabschnitte 11 auf, die keine Durchtrittsöffnungen 17 aufweisen. Die Anzahl der mit Durchtrittsöffnungen 17 versehenen Hüllrohrabschnitte 11 richtet sich ganz nach den örtlichen Erfordernissen des Gesteins. Zwischen dem letztangeordneten Hüllrohrabschnitt 11 und der Bohrlochwand ist eine das Bohrloch 6 schließende Dichtmanschette 22 vorgesehen.The taglichtseitige or air-side end portion 21 of the device has Hüllrohrabschnitte 11, which have no openings 17. The number of provided with openings 17 Hüllrohrabschnitte 11 depends entirely on the local requirements of the rock. Between the last arranged Hüllrohrabschnitt 11 and the borehole wall a hole 6 closing sealing sleeve 22 is provided.

Die Fig. 5a und 5b zeigen den Eintritt von Spülmittel 5 bzw. Drainagewasser in das Innere des Hüllrohres 10 und veranschaulichen die Querschittsverengung der durch die Einziehungen 12 für das abfließende Spülmittel 5 bzw. Drainagewasser gebildeten Kanäle, welche Querschnittsverengungen eine deutliche Erhöhung der Fließgeschwindigkeit des Spülmittels 5 bzw. des Drainagewassers und damit ein besseres Ausfördern des Bohrkleins gewährleisten.The Fig. 5a and 5b show the entry of detergent 5 and drainage water into the interior of the cladding tube 10 and illustrate the Querschittsverengung the channels formed by the drawbacks 12 for the draining rinsing 5 and drainage water channels, which cross-sectional constrictions significantly increase the flow rate of the detergent 5 and the drainage water and thus ensuring a better discharge of the cuttings.

Claims (15)

  1. Device for percussion or rotary percussion drilling into rock material, having a drill bit (2) arranged on a percussion drilling rod (1) and with its diameter exceeding the diameter of the percussion drilling rod (1), wherein the percussion drilling rod (1) has drilling rod sections (7), arranged one behind the other in the axial direction and connected to one another in each case by means of a coupling (8), and is surrounded by a cladding tube (10), which has cladding tube sections (11) which are arranged one behind the other in the axial direction and which are locked against one another against twisting, characterised by the combination of the following features:
    - that in each case a drilling rod section (7) is pivot-mounted opposite a cladding tube section (11) by means of at least one bearing sleeve (13) fixed to the cladding tube section (11),
    - wherein in each case a coupling (8) comes into contact in each case with a bearing sleeve (13) when the percussion drilling rod (1) impacts and
    - the length (L1) of the percussion drilling rod (1) from coupling (8) to coupling (8) is slightly greater in size than the length (L2) of a cladding tube section (11), wherein there is a distance (20) between adjacent cladding tube sections (11).
  2. Device according to Claim 1, characterised in that the length (L1) of the drilling rod sections (7) from coupling (8) to coupling (8) is greater in size than the length (L2) of a cladding tube section (11) by a value of 0.1 to 1.5 mm.
  3. Device according to Claim 1 or 2, characterised in that a hollow space (18) is provided between the percussion drilling rod (1) and the cladding tube (10), in that the percussion drilling rod (1) is hollow, and in that the cladding tube (10) is provided with openings (17) enabling the worked, drilled material to pass through into the interior of the cladding tube (10), wherein the cladding tube (10) is provided with two or more recesses (12) distributed around the circumference, aligned against the percussion drilling rod (1) and extending beyond its length, which recesses (12) have openings (17).
  4. Device according to Claim 3, characterised in that the recesses (12) extend in the radial direction up to the bearing sleeves (13) and these are fixed to the recesses (12).
  5. Device according to Claim 3 or 4 characterised in that the openings (17) are provided on the base of the recesses (12) which is nearest to the percussion drilling rod (1).
  6. Device according to any one of Claims 3 to 5, characterised in that a plurality of openings (17) are arranged one behind the other in the longitudinal direction of the cladding tube (10).
  7. Device according to any one of Claims 3 to 6, characterised in that the openings (17) are formed as longitudinal slots, wherein preferably in each case two longitudinal slots (17) are provided lying next to one another by forming a thin bridge (19).
  8. Device according to any one of Claims 1 to 7, characterised in that at the end of a cladding tube section (11) a push-fit connection (14) is provided for attaching another cladding tube section (11), wherein the push-fit connection (14) is provided on the outside of the cladding tube section (11) in the region of the recess (12).
  9. Device according to Claim 8, characterised in that the push-fit connection (14), on the one hand, is formed by a socket (15) provided on a cladding tube section (11) and, on the other hand, is formed by a pin (16) provided on the adjacent cladding tube section (11) and which can be inserted into the socket (15).
  10. Device according to any one of Claims 3 to 9, characterised in that the outer circumference of the cladding tube (10) is circular in cross-section and the recesses (12) have an at least partly circular shape in cross-section.
  11. Device according to any one of Claims 3 to 9, characterised in that the outer circumference of the cladding tube (10) is circular in cross-section and the recesses (12) are V-shaped in cross-section.
  12. Device according to any one of Claims 3 to 11, characterised in that four recesses (12) are evenly distributed over the circumference of the cladding tube (10).
  13. Device according to Claim 12, characterised in that for each cladding tube section (11) two push-fit connections (14) are provided at recesses (12) diametrically opposed to one another.
  14. Device according to any one of Claims 1 to 13, characterised in that on the daylight side or air side at least one cladding tube section (11) is provided without openings (17).
  15. Device according to Claim 14, characterised in that on the daylight side or air side a sealing sleeve (22) sealing the drill hole (6) is provided.
EP07845268A 2006-11-29 2007-11-29 Device for percussion drilling or rotary percussion drilling in rocky material Not-in-force EP2094933B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0198306A AT504560B1 (en) 2006-11-29 2006-11-29 DEVICE FOR BUTTONING DRILLING IN GESTEIN MATERIAL
PCT/AT2007/000535 WO2008064384A1 (en) 2006-11-29 2007-11-29 Device for percussion drilling or rotary percussion drilling in rocky material

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EP2094933A1 EP2094933A1 (en) 2009-09-02
EP2094933B1 true EP2094933B1 (en) 2011-03-23

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AT (2) AT504560B1 (en)
DE (1) DE502007006805D1 (en)
WO (1) WO2008064384A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT505189B1 (en) * 2007-04-19 2009-01-15 Techmo Entw & Vertriebs Gmbh DEVICE FOR MANUFACTURING A DRILL OIL IN ROCK MATERIAL
CN103132925B (en) * 2013-03-21 2015-04-22 西南石油大学 Downhole motive driller capable of improving drill column stretching capacity
CN109268006B (en) * 2018-11-23 2024-01-12 西安科技大学 Colliery drill chip device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT284016B (en) * 1966-02-28 1970-08-25 Boehler & Co Ag Geb Device for producing essentially horizontal bores in rock or soil
DE3210783A1 (en) * 1982-03-24 1983-10-06 Wolfgang Dipl Ing Ebeling Method and apparatus for driving roadways and shafts in the rock by means of a heading machine and a self-advancing support system
ID21554A (en) 1996-11-12 1999-06-24 Techmo Entw & Vertriebs Gmbh PROCESSES AND TOOLS TO DRILL AND ALWAYS LAY A HOLE
EP1105618B1 (en) 1998-08-21 2004-01-02 Techmo Entwicklungs- und Vertriebs GmbH Device for drilling or draining holes in soil or rock
AT413231B (en) * 2003-10-01 2005-12-15 Techmo Entw & Vertriebs Gmbh METHOD AND DEVICE FOR DRILLING HOLES IN SOIL OR ROCK MATERIAL
AT6969U3 (en) 2004-02-20 2005-05-25 Techmo Entw & Vertriebs Gmbh DEVICE FOR DRILLING HOLES IN GROUND OR ROCK MATERIAL

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AT504560B1 (en) 2009-06-15
AT504560A1 (en) 2008-06-15
EP2094933A1 (en) 2009-09-02
DE502007006805D1 (en) 2011-05-05
WO2008064384A1 (en) 2008-06-05
ATE503075T1 (en) 2011-04-15

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