EP0645519B1 - Drilling device with telescoping Kelly tube - Google Patents

Drilling device with telescoping Kelly tube Download PDF

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Publication number
EP0645519B1
EP0645519B1 EP94113836A EP94113836A EP0645519B1 EP 0645519 B1 EP0645519 B1 EP 0645519B1 EP 94113836 A EP94113836 A EP 94113836A EP 94113836 A EP94113836 A EP 94113836A EP 0645519 B1 EP0645519 B1 EP 0645519B1
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EP
European Patent Office
Prior art keywords
tube
drilling device
drilling
kellybar
tool
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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EP94113836A
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German (de)
French (fr)
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EP0645519A1 (en
Inventor
Gottfried Löser
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.)
Ing G Klemm Bohrtechnik GmbH
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Ing G Klemm Bohrtechnik GmbH
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Publication of EP0645519A1 publication Critical patent/EP0645519A1/en
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Classifications

    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers

Definitions

  • the invention relates to a Kelly bar drilling device, which is particularly suitable for pile drilling.
  • Kelly rods In the production of foundation bores for piles, Kelly rods are used, which can be telescoped in order to achieve drilling depths that are greater than the mast length without extension segments.
  • the Kelly rod consists of an outer tube and at least one telescopic tube arranged therein and displaceable therefrom, which can be locked with the outer tube in order to transmit the torque required for drilling and the axial pressing forces to the drilling tool.
  • the drilling tools usually used, which are attached to the front end of the innermost telescopic tube, are rotary drilling tools (augers, drilling buckets, core drilling bits), which take up the soil in the borehole. If the rotary drilling tool is filled with soil, the Kelly system is pulled up with a rope, whereby the pipes of the Kelly rod slide into each other.
  • the usual Kelly bar systems with rotary drilling tools can mainly only be used in non-rocky soils, but fail if there are pieces of rock or similar resistances in the soil that cannot be overcome by dry rotary drilling.
  • a drilling device according to the preamble of claim 1 is known.
  • a pressure medium such as compressed air or pressure fluid, cannot be led to the tool through a Kelly rod because the pressure medium would escape at the connection points of the tubes of the Kelly rod.
  • flushing holes are not possible with a Kelly rod drilling device in which a flushing medium is introduced into the borehole in order to flush out the drillings.
  • the invention has for its object to provide a drilling device with telescopic Kelly rod, with which larger drilling resistances can be overcome and which allows rotary drilling or rinsing drilling.
  • a pressure fluid is not introduced directly into the inside of the Kelly rod, but into a pressure line that extends in the Kelly rod.
  • This pressure line is connected to a rotary head, which has a non-rotating stator and a rotor which is connected to the innermost telescopic tube of the Kelly rod in a rotationally fixed manner having.
  • the stator of the rotary head is held in place by a fixing device so that the pressure line does not rotate or wind up when the Kelly rod is rotated.
  • the pressure line is connected to the innermost telescopic tube using a rotary head contained in the Kelly rod.
  • the tool can contain, for example, a deep hole hammer which is supplied with the pressure medium supplied and which strikes a drill bit.
  • the tool can also contain a flushing device, from which the pressure medium exits, in order to flush drilling material out of the borehole.
  • the invention makes it possible to additionally operate a Kelly rod drilling device with a pressure medium, which was not previously possible due to the sealing problems of the telescopic Kelly rod.
  • the drilling device has a drilling mast 10 which is fastened to the boom 12 of a vehicle 11 and can be placed vertically.
  • a carriage 14 can be moved vertically on a longitudinal guide 13 of the drilling mast.
  • the carriage 14 carries a drive head 15 for the telescopic Kelly bar 16.
  • the Kelly rod 16 has an outer tube 17 and in this case a single telescopic tube 18 which is telescopically displaceable in the outer tube. Both tubes 17 and 18 can have approximately the same length. They are or the like by splines. secured against mutual twisting. Furthermore, the telescopic tube 18 is locked in the fully extended state when the Kelly rod is rotated in one direction of rotation relative to the outer tube 17 against axial displacement. This lock can be released if the Kelly rod is rotated in the other direction of rotation, so that the tubes 17 and 18 can then be pushed into one another.
  • the front end of the telescopic tube 18 is closed with a welded-on base plate 19, which has an axially projecting transition piece 20.
  • the drilling tool 22 is fastened to this extension piece 20 with an adapter 21.
  • the drilling tool 22 consists of a deep hole hammer 23 and a drill bit 24.
  • a tube 25, which forms a channel 26, extends through the telescopic tube 18 over the entire length of the telescopic tube.
  • the lower end of the tube 25 is welded to the base plate 19 and the channel 26 communicates with the inlet 27 of the deep hole hammer 23 via the hollow extension 20.
  • the tube 25 is connected to the rotary head 30, which consists of a stator 31 and a rotor 32.
  • the connecting sleeve 28 is sealingly connected to the stator 31.
  • a flexible pressure line 33 leads to the stator 31, which passes through the drive head 15 and runs over deflection rollers 34, 35.
  • the pressure line 33 is held under tension by a flexible tensioning device (not shown). The pressure fluid supplied from the pressure line 33 to the rotary head 30 is transferred into the tube 25 and passed on from there to the tool 22.
  • the anti-rotation device 36 is a tube which is fastened to the carriage 14 with a holder 37 and projects through the drive head 15 into the outer tube 17 of the Kelly rod 16. This tube has strips or slots 37 which engage with projections 38 of the stator 31 so that the rotary head 30 can be moved axially in the anti-rotation device 36, but is secured against rotation.
  • a traction cable 40 runs through the tube 36 via deflection rollers 41, 42 provided at the upper end of the drilling mast 10 to form a cable winch 43 which can be driven around the telescopic tube 28 pull up with the tool 22.
  • the upper end of the borehole 44 is secured by a support tube 45, which can be pushed into the borehole in accordance with the drilling progress in order to support the borehole wall.
  • Supporting the borehole wall can be expedient to prevent the backwashed fluid from flushing out the borehole.
  • the drilling device works as follows:
  • the telescopic tube 18 is fully retracted into the outer tube 17.
  • the tube 36 is located between the tubes 17 and 18.
  • the tubes 17 and 18 are locked in this position relative to one another against axial displacement.
  • the drive head 15 engages on the outside of the outer tube 17 and rotates it, as a result of which the telescopic tube 18 and the tool 22 are also rotated.
  • the carriage 14 is moved downward along the drilling mast 10 and in doing so presses the Kelly rod 16 in rotation with the drive head 15.
  • the cable 40 is unwound by actuating a cable winch.
  • the telescopic tube 18 can be moved out of the outer tube 17 in accordance with the lowering speed specified by the advance of the tool.
  • Drilling can be carried out as rinsing drilling.
  • flushing medium air or liquid
  • This flushing medium passes through the rotary head 30 and the pipe 25 to the drilling tool 22. It emerges from the drill bit 24 and rinses the drill material up in the borehole 44.
  • drilling tool 22 instead of the drilling tool 22 shown in the drawings, other drilling tools that require a pressure or flushing medium can also be used.
  • the anti-rotation device 36 is attached to the carriage 14 and has a constant length.
  • the anti-rotation device can be attached to the drilling mast 10.

Abstract

The drilling device includes a telescopable Kellybar (16) with an outer tube (17) and at least one telescope tube (18). A tool (22) is mounted to the lower end of the telescope tube (18). In order to supply pressure medium to the drilling tool (22), the telescope tube (18) includes an inner tube (25) which is connected to a pressure line (33) via a rotating head (30). In order to secure the stator of the rotating head against rotation, a rotation protecting means (36) is provided which projects into the outer tube (17). Without exchanging the drilling mast, the drilling device can be used for drill hole depths greater than the length of the drilling mast (10); nevertheless, it can be used with pressure fluid as flushing agent or driving agent for a tool.

Description

Die Erfindung betrifft eine Kellystangen-Bohrvorrichtung, die insbesondere für Pfahlbohrungen geeignet ist.The invention relates to a Kelly bar drilling device, which is particularly suitable for pile drilling.

Bei der Herstellung von Gründungsbohrungen für Pfähle werden Kellystangen eingesetzt, welche teleskopierbar sind, um ohne Verlängerungssegmente Bohrtiefen zu erreichen, die größer als die Bohrmastlänge sind. Die Kellystange besteht aus einem Außenrohr und mindestens einem darin angeordneten und aus diesem heraus verschiebbaren Teleskoprohr, welches mit dem Außenrohr verriegelbar ist, um das zum Bohren erforderliche Drehmoment und die axialen Andruckkräfte auf das Bohrwerkzeug zu übertragen. Die üblicherweise eingesetzten Bohrwerkzeuge, die am vorderen Ende des innersten Teleskoprohres befestigt werden, sind Drehbohrwerkzeuge (Bohrschnecken, Bohrkübel, Kernbohrschappen), welche das im Bohrloch befindliche Erdreich aufnehmen. Wenn das Drehbohrwerkzeug mit Erdreich gefüllt ist, wird das Kellysystem mit einem Seil hochgezogen, wobei die Rohre der Kellystange sich ineinanderschieben.In the production of foundation bores for piles, Kelly rods are used, which can be telescoped in order to achieve drilling depths that are greater than the mast length without extension segments. The Kelly rod consists of an outer tube and at least one telescopic tube arranged therein and displaceable therefrom, which can be locked with the outer tube in order to transmit the torque required for drilling and the axial pressing forces to the drilling tool. The drilling tools usually used, which are attached to the front end of the innermost telescopic tube, are rotary drilling tools (augers, drilling buckets, core drilling bits), which take up the soil in the borehole. If the rotary drilling tool is filled with soil, the Kelly system is pulled up with a rope, whereby the pipes of the Kelly rod slide into each other.

Die üblichen Kellystangen-Systeme mit Drehbohrwerkzeugen sind vorwiegend nur in nicht felsigen Böden einsetzbar, versagen jedoch, wenn im Boden Felsstücke oder ähnliche Widerstände vorhanden sind, die durch trockenes Drehbohren nicht überwunden werden können. Aus der DE-C-4 038 424 ist eine Bohreinrichtung nach dem Oberbegriff des Anspruchs 1 bekannt. Ein Druckmedium, wie Druckluft oder Druckflüssigkeit, kann durch eine Kellystange nicht zum Werkzeug geführt werden, weil das Druckmedium an den Verbindungsstellen der Rohre der Kellystange entweichen würde. Aus dem gleichen Grund sind mit einer Kellystangen-Bohrvorrichtung auch keine Spülbohrungen möglich, bei denen ein Spülmedium in das Bohrloch eingeleitet wird, um das Bohrgut auszuspülen.The usual Kelly bar systems with rotary drilling tools can mainly only be used in non-rocky soils, but fail if there are pieces of rock or similar resistances in the soil that cannot be overcome by dry rotary drilling. From DE-C-4 038 424 a drilling device according to the preamble of claim 1 is known. A pressure medium, such as compressed air or pressure fluid, cannot be led to the tool through a Kelly rod because the pressure medium would escape at the connection points of the tubes of the Kelly rod. For the same reason, flushing holes are not possible with a Kelly rod drilling device in which a flushing medium is introduced into the borehole in order to flush out the drillings.

Der Erfindung liegt die Aufgabe zugrunde, eine Bohrvorrichtung mit teleskopierbarer Kellystange zu schaffen, mit der auch größere Bohrwiderstände überwunden werden können und die ein Drehschlagbohren oder ein Spülbohren ermöglicht.The invention has for its object to provide a drilling device with telescopic Kelly rod, with which larger drilling resistances can be overcome and which allows rotary drilling or rinsing drilling.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den im Patentanspruch 1 angegebenen Merkmalen.This object is achieved according to the invention with the features specified in claim 1.

Bei der erfindungsgemäßen Bohrvorrichtung wird ein Druckfluid nicht unmittelbar in das Innere der Kellystange eingeleitet, sondern in eine Druckleitung, die sich in der Kellystange erstreckt. Diese Druckleitung ist an einen Drehkopf angeschlossen, welcher einen nicht mitdrehenden Stator und einen drehfest mit dem innersten Teleskoprohr der Kellystange verbundenen Rotor aufweist. Der Stator des Drehkopfs wird mit einer Fixiervorrichtung festgehalten, so daß die Druckleitung sich beim Drehen der Kellystange nicht mitdreht oder aufwickelt. Auf diese Weise wird die Druckleitung unter Verwendung eines in der Kellystange enthaltenen Drehkopfes mit dem innersten Teleskoprohr verbunden. Dadurch gelingt es, das Druckmedium an das Werkzeug heranzubringen. Das Werkzeug kann beispielsweise einen Tieflochhammer enthalten, der mit dem zugeführten Druckmedium versorgt wird und Schläge auf eine Bohrkrone ausübt. Das Werkzeug kann auch eine Spüleinrichtung enthalten, aus der das Druckmedium austritt, um Bohrgut aus dem Bohrloch auszuspülen.In the drilling device according to the invention, a pressure fluid is not introduced directly into the inside of the Kelly rod, but into a pressure line that extends in the Kelly rod. This pressure line is connected to a rotary head, which has a non-rotating stator and a rotor which is connected to the innermost telescopic tube of the Kelly rod in a rotationally fixed manner having. The stator of the rotary head is held in place by a fixing device so that the pressure line does not rotate or wind up when the Kelly rod is rotated. In this way, the pressure line is connected to the innermost telescopic tube using a rotary head contained in the Kelly rod. This makes it possible to bring the pressure medium to the tool. The tool can contain, for example, a deep hole hammer which is supplied with the pressure medium supplied and which strikes a drill bit. The tool can also contain a flushing device, from which the pressure medium exits, in order to flush drilling material out of the borehole.

Durch die Erfindung gelingt es, eine Kellystangen-Bohrvorrichtung zusätzlich mit einem Druckmedium zu betreiben, was bisher wegen der Abdichtprobleme der teleskopierbaren Kellystange nicht möglich war.The invention makes it possible to additionally operate a Kelly rod drilling device with a pressure medium, which was not previously possible due to the sealing problems of the telescopic Kelly rod.

Im folgenden wird unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert.In the following an embodiment of the invention will be explained with reference to the drawings.

Es zeigen:

Fig. 1
eine Ansicht der Bohrvorrichtung, teilweise geschnitten, während des Bohrbetriebes,
Fig. 2
in vergrößertem Maßstab eine Darstellung von Einzelheiten aus Fig. 1 und
Fig. 3
die Bohrvorrichtung im hochgezogenen Zustand.
Show it:
Fig. 1
a view of the drilling device, partially cut, during the drilling operation,
Fig. 2
on an enlarged scale a representation of details from Fig. 1 and
Fig. 3
the drilling device when pulled up.

Die Bohrvorrichtung weist einen Bohrmast 10 auf, der an dem Ausleger 12 eines Fahrzeugs 11 befestigt ist und senkrecht aufgestellt werden kann. An einer Längsführung 13 des Bohrmasts ist ein Schlitten 14 vertikal verfahrbar. Der Schlitten 14 trägt einen Antriebskopf 15 für die teleskopierbare Kellystange 16.The drilling device has a drilling mast 10 which is fastened to the boom 12 of a vehicle 11 and can be placed vertically. A carriage 14 can be moved vertically on a longitudinal guide 13 of the drilling mast. The carriage 14 carries a drive head 15 for the telescopic Kelly bar 16.

Die Kellystange 16 weist ein Außenrohr 17 und in diesem Fall ein einziges Teleskoprohr 18 auf, das im Außenrohr teleskopisch verschiebbar ist. Beide Rohre 17 und 18 können etwa die gleiche Länge haben. Sie sind durch Keilverzahnungen o.dgl. gegen gegenseitiges Verdrehen gesichert. Ferner wird das Teleskoprohr 18 im voll ausgezogenen Zustand bei Drehung der Kellystange in der einen Drehrichtung relativ zum Außenrohr 17 gegen Axialverschiebung verriegelt. Diese Verriegelung kann aufgehoben werden, wenn die Kellystange in der anderen Drehrichtung gedreht wird, so daß dann die Rohre 17 und 18 ineinandergeschoben werden können.The Kelly rod 16 has an outer tube 17 and in this case a single telescopic tube 18 which is telescopically displaceable in the outer tube. Both tubes 17 and 18 can have approximately the same length. They are or the like by splines. secured against mutual twisting. Furthermore, the telescopic tube 18 is locked in the fully extended state when the Kelly rod is rotated in one direction of rotation relative to the outer tube 17 against axial displacement. This lock can be released if the Kelly rod is rotated in the other direction of rotation, so that the tubes 17 and 18 can then be pushed into one another.

Das vordere Ende des Teleskoprohrs 18 ist mit einer angeschweißten Bodenplatte 19 verschlossen, die ein axial abstehendes Übergangsstück 20 aufweist. An diesem Ansatzstück 20 wird mit einem Adapter 21 das Bohrwerkzeug 22 befestigt. Bei dem dargestellten Ausführungsbeispiel besteht das Bohrwerkzeug 22 aus einem Tieflochhammer 23 und einer Bohrkrone 24.The front end of the telescopic tube 18 is closed with a welded-on base plate 19, which has an axially projecting transition piece 20. The drilling tool 22 is fastened to this extension piece 20 with an adapter 21. In the illustrated embodiment, the drilling tool 22 consists of a deep hole hammer 23 and a drill bit 24.

Durch das Teleskoprohr 18 erstreckt sich über die gesamte Länge des Teleskoprohrs ein Rohr 25, welches einen Kanal 26 bildet. Das untere Ende des Rohres 25 ist an die Bodenplatte 19 angeschweißt und der Kanal 26 steht über das hohle Ansatzstück 20 mit dem Einlaß 27 des Tieflochhammers 23 in Verbindung.A tube 25, which forms a channel 26, extends through the telescopic tube 18 over the entire length of the telescopic tube. The lower end of the tube 25 is welded to the base plate 19 and the channel 26 communicates with the inlet 27 of the deep hole hammer 23 via the hollow extension 20.

Am oberen Ende des Rohres 25 befindet sich eine Anschlußmuffe 28, die geringfügig über das obere Ende des Teleskoprohres 18 hinaus vorsteht.At the upper end of the tube 25 there is a connecting sleeve 28 which protrudes slightly beyond the upper end of the telescopic tube 18.

Das Rohr 25 ist an den Drehkopf 30 angeschlossen, der aus einem Stator 31 und einen Rotor 32 besteht. Die Anschlußmuffe 28 ist abdichtend mit dem Stator 31 verbunden. Zu dem Stator 31 führt eine flexible Druckleitung 33, welche durch den Antriebskopf 15 hindurchgeht und über Umlenkrollen 34,35 läuft. Die Druckleitung 33 wird von einer (nicht dargestellten) nachgiebigen Spanneinrichtung gespannt gehalten. Das von der Druckleitung 33 zum Drehkopf 30 gelieferte Druckfluid wird in das Rohr 25 übertragen und von diesem an das Werkzeug 22 weitergeleitet.The tube 25 is connected to the rotary head 30, which consists of a stator 31 and a rotor 32. The connecting sleeve 28 is sealingly connected to the stator 31. A flexible pressure line 33 leads to the stator 31, which passes through the drive head 15 and runs over deflection rollers 34, 35. The pressure line 33 is held under tension by a flexible tensioning device (not shown). The pressure fluid supplied from the pressure line 33 to the rotary head 30 is transferred into the tube 25 and passed on from there to the tool 22.

Während das Rohr 25 sich zusammen mit der Kellystange 16 dreht, wird der Stator 31 des Drehkopfes 30 von einer Drehsicherungsvorrichtung 36 gegen Verdrehung gesichert. Die Drehsicherungsvorrichtung 36 ist ein Rohr, das mit einer Halterung 37 an dem Schlitten 14 betestigt ist und durch den Antriebskopf 15 hindurch in das Außenrohr 17 der Kellystange 16 hineinragt. Dieses Rohr hat Leisten oder Schlitze 37, die mit Ansätzen 38 des Stators 31 zusammengreifen, so daß der Drehkopf 30 in der Drehsicherungsvorrichtung 36 axial bewegt werden kann, dabei jedoch gegen Verdrehung gesichert ist.While the tube 25 rotates together with the Kelly rod 16, the stator 31 of the rotary head 30 is secured against rotation by a rotation locking device 36. The anti-rotation device 36 is a tube which is fastened to the carriage 14 with a holder 37 and projects through the drive head 15 into the outer tube 17 of the Kelly rod 16. This tube has strips or slots 37 which engage with projections 38 of the stator 31 so that the rotary head 30 can be moved axially in the anti-rotation device 36, but is secured against rotation.

An dem Stator 31 befindet sich ferner eine Halterung 39 für ein Zugseil 40. Dieses Zugseil verläuft durch das Rohr 36 hindurch über am oberen Ende des Bohrmasts 10 vorgesehene Umlenkrollen 41,42 zu einer Seilwinde 43, die angetrieben werden kann, um das Teleskoprohr 28 zusammen mit dem Werkzeug 22 hochzuziehen.On the stator 31 there is also a holder 39 for a traction cable 40. This traction cable runs through the tube 36 via deflection rollers 41, 42 provided at the upper end of the drilling mast 10 to form a cable winch 43 which can be driven around the telescopic tube 28 pull up with the tool 22.

Bei dem dargestellten Ausführungsbeispiel ist das obere Ende des Bohrlochs 44 durch ein Stützrohr 45 gesichert, das entsprechend dem Bohrfortschritt in das Bohrloch nachgeschoben werden kann, um die Bohrlochwand abzustützen. Eine Abstützung der Bohrlochwand kann zweckmäßig sein, um zu verhindern, daß das im Rohrloch rückgespülte Fluid das Bohrloch ausspült.In the illustrated embodiment, the upper end of the borehole 44 is secured by a support tube 45, which can be pushed into the borehole in accordance with the drilling progress in order to support the borehole wall. Supporting the borehole wall can be expedient to prevent the backwashed fluid from flushing out the borehole.

Die Bohrvorrichtung arbeitet wie folgt:The drilling device works as follows:

Zunächst wird mit eingezogener Kellystange 16 gemäß Fig. 3 gearbeitet, wobei das Teleskoprohr 18 vollständig in das Außenrohr 17 eingezogen ist. Dabei befindet sich das Rohr 36 zwischen den Rohren 17 und 18. Die Rohre 17 und 18 sind in dieser Stellung relativ zueinander gegen Axialverschiebung verriegelt. Der Antriebskopf 15 greift außen an dem Außenrohr 17 an und dreht dieses, wodurch das Teleskoprohr 18 und das Werkzeug 22 mitgedreht werden. Der Schlitten 14 wird entlang des Bohrmasts 10 nach unten bewegt und drückt dabei mit dem Antriebskopf 15 die Kellystange 16 drehend vor. Wenn der Schlitten 14 sich zum unteren Ende des Bohrmasts 10 bewegt hat, wird über die Betätigung einer Seilwinde das Seil 40 abgespult. Hierdurch kann das Teleskopf-Rohr 18 entsprechend der vom Vortrieb des Werkzeugs vorgegebenen Absenkgeschwindigkeit aus dem Außenrohr 17 ausgefahren werden.3, the telescopic tube 18 is fully retracted into the outer tube 17. The tube 36 is located between the tubes 17 and 18. The tubes 17 and 18 are locked in this position relative to one another against axial displacement. The drive head 15 engages on the outside of the outer tube 17 and rotates it, as a result of which the telescopic tube 18 and the tool 22 are also rotated. The carriage 14 is moved downward along the drilling mast 10 and in doing so presses the Kelly rod 16 in rotation with the drive head 15. When the carriage 14 has moved to the lower end of the drilling mast 10, the cable 40 is unwound by actuating a cable winch. As a result, the telescopic tube 18 can be moved out of the outer tube 17 in accordance with the lowering speed specified by the advance of the tool.

Das Bohren kann als Spülbohren durchgeführt werden. Dabei wird über die Druckleitung 33 Spülmedium (Luft oder Flüssigkeit) zugeführt. Dieses Spülmedium gelangt durch den Drehkopf 30 und das Rohr 25 zum Bohrwerkzeug 22. Es tritt an der Bohrkrone 24 aus und spült das Bohrgut im Bohrloch 44 hoch.Drilling can be carried out as rinsing drilling. In this case, flushing medium (air or liquid) is supplied via the pressure line 33. This flushing medium passes through the rotary head 30 and the pipe 25 to the drilling tool 22. It emerges from the drill bit 24 and rinses the drill material up in the borehole 44.

Ferner ist es möglich, einen Schlagbohrbetrieb durchzuführen, indem der Tieflochhammer 22 betätigt wird. Der Tieflochhammer wird von dem unter Druck zugeführten Medium angetrieben, um Schläge auf die Bohrkrone 24 auszuüben. Dadurch kann felsiges Gestein 46 zertrümmert werden.It is also possible to perform an impact drilling operation by operating the deep hole hammer 22. The deep hole hammer is driven by the medium supplied under pressure in order to strike the drill bit 24. Rocky rock 46 can thereby be crushed.

Anstelle des in den Zeichnungen dargestellten Bohrwerkzeugs 22 können auch andere Bohrwerkzeuge benutzt werden, die ein Druck- oder Spülmedium benötigen.Instead of the drilling tool 22 shown in the drawings, other drilling tools that require a pressure or flushing medium can also be used.

Bei dem beschriebenen Ausführungsbeispiel ist die Drehsicherungsvorrichtung 36 an dem Schlitten 14 befestigt und sie hat eine konstante Länge. Alternativ besteht auch die Möglichkeit, die Drehsicherungsvorrichtung teleskopierbar zu machen, so daß sie sich an die Ausfahrlänge des Teleskoprohrs 18 anpaßt bzw. dem Teleskoprohr folgt. In diesem Fall kann die Drehsicherungsvorrichtung am Bohrmast 10 befestigt sein.In the described embodiment, the anti-rotation device 36 is attached to the carriage 14 and has a constant length. Alternatively, there is also the possibility of making the anti-rotation device telescopic so that it adapts to the extension length of the telescopic tube 18 or follows the telescopic tube. In this case, the anti-rotation device can be attached to the drilling mast 10.

Claims (10)

  1. A drilling device, comprising a telescopable Kellybar (16) including an outer tube (17) and at least one telescope tube (18) guided and lockable therein, a tool (22) being mountable to the front end of the innermost telescope tube (18), and comprising a drilling mast (10) on which a carriage (14) is displaceable, which comprises a drive head (15) for rotating the outer tube (17) of the Kellybar (16), wherein a rotating head (30) is provided in the Kellybar (16), which comprises a stator (31) connected to at least one pressure line (33) and a rotor (32) connected to the front end of the innermost telescope tube (18), and a rotation protecting means (36) projecting into the outer tube (17) extends to the stator (31) and protects it against co-rotation with the Kellybar (16).
  2. The drilling device according to claim 1, comprising a traction element (40) engaging at the rotating head (30) for pulling up the innermost telescope tube (18) of the Kellybar (16).
  3. The drilling device according to claim 1 or 2, wherein the rotation protecting means (36) consists of a tube passing through the drive head (15) and being held so as to be secured against rotation above the drive head.
  4. The drilling device according to one of claims 1 to 3, wherein the pressure line (33) is a flexible hose line which is led over a roll (34) supported on the drilling mast (10) and is resiliently biased in its longitudinal direction.
  5. The drilling device according to one of claims 1 to 4, wherein the rotor (32) of the rotating head (30) is connected to at least one channel (26) extending through the innermost telescope tube (18) to the lower end thereof.
  6. The drilling device according to claim 5, wherein the channel (26) extends in a tube (25) being connected, at the lower end of the innermost telescope tube (18), to a bottom plate (19) closing this telescope tube.
  7. The drilling device according to claim 6, wherein the bottom plate (19) comprises a projecting transition piece (20) for mounting a tool (22), the transition piece (20) having at least one bore to supply pressure medium to the tool (22).
  8. The drilling device according to one of claims 1 to 7, wherein the rotation protecting means (36) is a telescopable tubing.
  9. The drilling device according to one of claims 1 to 7, wherein the rotation protecting means (36) is a rigid tube, and the stator (31) of the rotating head (30) slides along the rotation protecting means.
  10. A Kellybar for use in a drilling device according to one of the preceding claims, comprising an outer tube (17) and at least one telescope tube (18) guided and lockable therein, said innermost telescope tube (18) surrounding a channel (26) to the upper end of which the rotor is mountable.
EP94113836A 1993-09-29 1994-09-03 Drilling device with telescoping Kelly tube Expired - Lifetime EP0645519B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4333114 1993-09-29
DE4333114A DE4333114C1 (en) 1993-09-29 1993-09-29 Drilling apparatus with telescopic kelly bar

Publications (2)

Publication Number Publication Date
EP0645519A1 EP0645519A1 (en) 1995-03-29
EP0645519B1 true EP0645519B1 (en) 1997-12-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113836A Expired - Lifetime EP0645519B1 (en) 1993-09-29 1994-09-03 Drilling device with telescoping Kelly tube

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US (1) US5501287A (en)
EP (1) EP0645519B1 (en)
AT (1) ATE161314T1 (en)
DE (2) DE4333114C1 (en)

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ITTO20010032A1 (en) * 2001-01-17 2002-07-17 Soilmec Spa DRILLING UNIT FOR FOUNDATION POLES.
US6520542B2 (en) * 2001-03-19 2003-02-18 Kenneth Thompson Promotional two-piece in one postcard housing an integral coupon card
GB2376248B (en) * 2001-06-04 2005-04-13 High Mead Developments Ltd Apparatus and method for rotary bored drilling
US6907934B2 (en) * 2003-03-11 2005-06-21 Specialty Rental Tool & Supply, L.P. Universal top-drive wireline entry system bracket and method
US6955219B2 (en) * 2003-07-03 2005-10-18 Enlink Geoenergy Services, Inc. Earth loop installation with sonic drilling
US7418128B2 (en) * 2003-07-31 2008-08-26 Microsoft Corporation Elastic distortions for automatic generation of labeled data
WO2013040745A1 (en) * 2011-09-19 2013-03-28 长沙中联重工科技发展股份有限公司 Method for monitoring shaft-bonding of drilling shaft of drilling rig, controller, system, and drilling rig
EP2821585B1 (en) 2013-07-03 2016-01-20 Bauer Spezialtiefbau GmbH Drilling device and drilling method
WO2018132861A1 (en) 2017-01-18 2018-07-26 Deep Exploration Technologies Crc Limited Mobile coiled tubing drilling apparatus
US10890040B2 (en) * 2018-10-12 2021-01-12 Caterpillar Global Mining Equipment Llc Rotary head guide system for drilling machine
NL1043302B1 (en) * 2019-06-17 2021-01-25 Magali Shachar Tubular drive assembly
EP3779117A1 (en) * 2019-08-16 2021-02-17 BAUER Maschinen GmbH Kelly bar assembly for a drill and method for working soil
WO2021116329A1 (en) * 2019-12-12 2021-06-17 Sven Beckhusen Device for connecting a drill pipe to the drilling drive of a drilling rig, and drilling assembly for boreholes comprising such a device
EP4060161B1 (en) * 2021-03-18 2023-06-28 BAUER Maschinen GmbH Swivel

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US1855999A (en) * 1931-05-29 1932-04-26 Edward T Shinn Boring machine
US1895901A (en) * 1932-04-09 1933-01-31 Raymond Concrete Pile Co Kelly bar
US2781185A (en) * 1954-06-02 1957-02-12 Robbins Davis Drilling apparatus
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DE4038424C1 (en) * 1990-12-01 1992-04-09 Ing. Guenter Klemm Bohrtechnik Gmbh, 5962 Drolshagen, De Kelly borehole drilling arrangement - involves telescopically nested pipes connected to drill head

Also Published As

Publication number Publication date
EP0645519A1 (en) 1995-03-29
DE59404817D1 (en) 1998-01-29
ATE161314T1 (en) 1998-01-15
DE4333114C1 (en) 1994-10-13
US5501287A (en) 1996-03-26

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