EP3877624B1 - Kelly bar assembly for a drill and method for working soil - Google Patents

Kelly bar assembly for a drill and method for working soil Download PDF

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Publication number
EP3877624B1
EP3877624B1 EP20750664.3A EP20750664A EP3877624B1 EP 3877624 B1 EP3877624 B1 EP 3877624B1 EP 20750664 A EP20750664 A EP 20750664A EP 3877624 B1 EP3877624 B1 EP 3877624B1
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EP
European Patent Office
Prior art keywords
kelly bar
attachment section
rotary
inner kelly
bar arrangement
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EP20750664.3A
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German (de)
French (fr)
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EP3877624A1 (en
Inventor
Sebastian Bauer
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Bauer Maschinen GmbH
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Bauer Maschinen GmbH
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Publication of EP3877624A1 publication Critical patent/EP3877624A1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • 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
    • 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
    • E21B17/04—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
    • E21B17/073—Telescoping joints for varying drill string lengths; Shock absorbers with axial rotation
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting

Definitions

  • the invention relates to a Kelly rod arrangement for a drilling device, in particular an earth drilling device, with a tubular outer Kelly rod, which is designed to rest on a drilling drive and to absorb a drilling torque of the drilling drive, and with an inner Kelly rod, which is movably mounted inside the outer Kelly rod and has a cable suspension , wherein the drilling torque can be transmitted between the outer kelly rod and the inner kelly rod, according to the preamble of claim 1.
  • a generic Kelly bar arrangement according to the preamble is from DE 43 33 114 C1 famous.
  • the rotor of the rotary feedthrough for the pressure fluid is passively driven in a known manner. This passive entrainment is prone to failure in the harsh environmental conditions that usually prevail on construction sites.
  • the EP 2 821 585 A1 discloses a drill rod assembly that also includes a rotary union for pressurized fluid.
  • the rotor rotates passively, which is carried along in relation to the stator sleeve.
  • the EP 3 228 756 A1 discloses a construction machine with a drill rod. This disclosure does not show any details of a possible pressurized fluid rotary union and thus only represents a possible use for drill strings.
  • the invention relates to a method for tilling the soil, in which a Kelly bar arrangement is set in rotary motion by means of a drill drive, with a soil tillage tool being attached to an inner Kelly bar of the Kelly bar arrangement, which tills a soil, according to the preamble of claim 12.
  • Kelly bar arrangements for a drill have long been known in foundation engineering.
  • Such kelly rod arrangements are telescopic and have an outer outer kelly rod which is connected to a drilling drive of the drilling device in a rotating connection.
  • An inner kelly rod and optionally further intermediate kelly rods are arranged inside the outer kelly rod, which are mounted in the outer kelly rod and in relation to one another in an axially displaceable manner.
  • the inner kelly bar has a cable suspension so that the inner kelly bar and also the entire kelly bar arrangement can be held on the cable and moved vertically.
  • axially running stop strips are provided on the outer and inner sides of the individual Kelly bar elements, which allow both axial displacement and torque transmission in the circumferential direction.
  • Such a Kelly bar arrangement enables efficient cable suspension of a soil cultivation tool with the simultaneous possibility of torque transmission.
  • the telescoping capability of the individual Kelly bar elements relative to one another makes it possible to reach working depths that are greater than the height of the mast of a drilling rig.
  • Kelly bar assemblies of this type are used for working with simple mechanical tillage tools, such as a drill bucket or an auger.
  • simple mechanical tillage tools such as a drill bucket or an auger.
  • the use of a Kelly bar arrangement becomes problematic when a medium, such as a flushing liquid or a pressurized fluid, is to be supplied from the outside.
  • the invention is based on the object of specifying a Kelly bar arrangement and a method for tilling the soil with a Kelly bar arrangement, which can be used in a particularly diverse manner.
  • the Kelly bar arrangement according to the invention is characterized in that at least one line is arranged on the inner Kelly bar, that a rotary feedthrough with a first end section and a second end section is arranged at a lower or upper end region of the inner Kelly bar, the first connection section being non-rotatably connected to the Kelly bar that can be driven in rotation and forms a line connection to the at least one line of the inner kelly rod and the second connection section is connected to a supply line, which is stationary relative to the inner kelly rod that can be driven in rotation, and that a rotary device for actively rotating the two connection sections relative to one another is arranged on the rotary feedthrough.
  • a first aspect of the invention is to provide a rotary union on the inner kelly rod.
  • a swivel is an element that enables a line connection between a rotating part and a part that is stationary relative to it.
  • This rotary bushing can be arranged on a lower or upper end area of the inner Kelly rod.
  • At least one line is preferably provided along the inner Kelly bar, which leads from the upper end area to a lower area of the Kelly bar.
  • the rotary leadthrough is arranged on a lower end area of the inner kelly rod, in which case the line rotating with the inner kelly rod can be correspondingly shorter.
  • the relatively fixed feed line can be routed within the inner cavity of the inner kelly rod from above to the second connection section of the rotary feedthrough at the lower end area.
  • a rotary device for actively rotating the two connection sections relative to one another is arranged on the rotary feedthrough.
  • the invention is based on the finding that the upper end of the inner kelly rod can be moved to a lower end region of the outer kelly rod, for example when the kelly rod arrangement is telescoped out.
  • a necessary reliable mechanical support of the rotary feedthrough against a part that is stationary relative to the rotating Kelly bar arrangement becomes practically impossible.
  • a rotary device is provided for actively twisting the two connection sections relative to one another. In this way, an undesired wrapping of the supply line around the cable can be counteracted in a targeted manner.
  • a Kelly bar arrangement with the advantageous cable suspension and the telescoping capability with simultaneous torque transmission can also be used for tillage tools in which the supply of a fluid, energy or data via a supply line from the outside is necessary or desired.
  • the rotary feedthrough can be arranged at any point on the upper end area of the inner kelly rod.
  • it is particularly advantageous that the rotary leadthrough is arranged on the inner kelly rod below the cable suspension.
  • the rotary feedthrough can be ring-shaped, with the cable suspension being able to be arranged in a central area of the rotary feedthrough.
  • a further preferred embodiment of the invention is that the rotating device has at least one drive motor for actively rotating the second connection section relative to the first connection section.
  • further drive motors can also be provided.
  • the drive motor is arranged on the second connection section, which lies above the first connection section. There is good accessibility to the drive motor. In addition, energy can be supplied to the drive motor in parallel or with the supply line.
  • the drive motor is an electric motor or a hydraulic motor.
  • the drive motor can be designed to be very compact overall, since only relatively low torques have to be applied for the necessary compensation for the rotational movement between the two connection sections.
  • a compressed air motor can also be provided.
  • a further advantageous embodiment of the invention is that the cable suspension has a cable swivel.
  • a swivel within the meaning of the invention is a swivel joint which enables a lower linkage of the swivel to the inner kelly rod to be twisted in relation to an upper linkage of the swivel to the suspension rope.
  • a rope swivel can be used to ensure that a rotary movement of the inner kelly rod, which is attached to the lower linkage of the rope swivel, cannot be transferred to the upper part of the rope swivel and thus to the rest of the rope. In this way, twisting of the suspension cable can be reliably avoided.
  • the line of the inner Kelly rod can be designed as a hollow line, for example a hose or a tube or as a cable for conducting electrical current or data.
  • an axial cavity of the inner Kelly rod is provided as a line, which cavity is designed for the passage of a fluid.
  • the fluid can in particular be a flushing liquid or a concrete suspension.
  • a connection area can be provided at the lower end of the inner kelly rod, with which a line connection to a soil cultivation tool, in particular a drilling tool, attached to the lower end of the inner kelly rod is made possible.
  • a cable is provided as a line on the inner kelly rod, which cable is designed to conduct electricity and/or data.
  • the cable can be routed as an additional line along the axial cavity of the inner Kelly rod.
  • the rotary feedthrough is designed alone or additionally with corresponding contact rings on the two connection sections, which ensure frictional contact for power or data transmission during a rotary movement.
  • the invention also includes a drilling device, in particular an earth drilling device, with a drilling drive, the Kelly bar arrangement according to the invention described above being provided.
  • the drill drive is preferably designed in the form of a ring with a passage through which the outer Kelly bar of the Kelly bar arrangement is guided.
  • the ring-shaped rotary drive has a ring-shaped drive wheel, which is provided with drive projections on its inside. For torque transmission, these interact in a known manner with axial drive rails on the outside of the outer kelly rod.
  • a controller is provided for the rotary device and that a rotary sensor is provided for determining a speed and/or a direction of rotation of at least the inner Kelly rod, which is in signal communication with the controller.
  • the rotary device and thus the drive motor can always be controlled by the controller in such a way that the upper second connection section of the rotary feedthrough is as fixed as possible relative to the rotating inner Kelly rod.
  • the rotary device is driven in a controlled manner by the control device, so that the second connection section of the rotary feedthrough is driven and synchronized in the opposite direction to a rotary movement of the inner Kelly rod.
  • Exact compensation of the rotary movement of the inner kelly rod takes place, so that the opposite rotary movement by the rotary device achieves a desired standstill of the second connection section with the feed line, which in principle can also be a fluid line and/or a cable.
  • the method for soil cultivation according to the invention which can be carried out in particular with the drilling device described above, is characterized in that a rotary device is provided for actively rotating the second connection section relative to the first connection section, with the second connection section being operated in the opposite direction to a rotary movement of the inner kelly rod.
  • a particularly precise coordination of the rotary movement can be achieved according to a further development of the invention in that the rotary device depends on the speed of the inner Kelly rod or the drill drive is operated.
  • a speed setting of the drill drive can be used directly as a specification for the rotating device.
  • the speed of the inner Kelly rod or the drill drive can be detected by a rotary pick-up and used to control the rotary device.
  • a drill 10 according to FIG 1 includes a crawler chassis as an undercarriage 12, on which a superstructure 14 is rotatably mounted.
  • a substantially vertical mast 20 is pivoted on the superstructure 14 and can be adjusted with regard to a mast inclination by means of an adjusting arrangement 18 with hydraulic cylinders. Attached to an upper end of the mast 20 is a mast head 22 over which a carrying cable 30 is guided to a winch 16 on the superstructure 14 .
  • a Kelly bar arrangement 40 according to the invention is suspended from the supporting cable 30 by means of a cable suspension 60 .
  • the Kelly bar arrangement 40 is guided in a basically known manner through an annular drill drive 24 , which is also referred to as a top drive and is mounted on a carriage 25 so that it can be moved vertically along a guide on a front side of the mast 20 .
  • Attached to a lower end of the Kelly bar arrangement 40 is a tillage tool 26 which, in the exemplary embodiment shown, is designed as a drilling bucket with lower removal teeth.
  • the Kelly bar arrangement 40 can be moved in the vertical direction relative to the drill drive 24 .
  • the Kelly bar arrangement 40 enables a soil cultivation tool 26 to be suspended from a cable while at the same time enabling torque to be transmitted from the drill drive 24 to the soil cultivation tool 26.
  • the kelly bar assembly 40 includes an outer kelly bar 42 with outer drive bars 46, an inner kelly bar 50 with outer drive bars 53, and an intermediate kelly bar 48 with outer drive bars 49 therebetween.
  • the outer kelly rod 42, the intermediate kelly rod 48 and the inner kelly rod 50 are each axially displaceable with respect to one another, with the torque being transferred in a basically known manner from the outer kelly rod 42 to the intermediate kelly rod 48 and from this to the inner kelly rod 50 independently of the respective axial adjustment position can be transmitted.
  • locking pockets can be provided on the individual rod elements, so that axial forces can also be transmitted to a certain extent via the Kelly rod arrangement 40 in a locked state.
  • a sleeve-shaped support section 44 with a radial support surface is provided in an upper region of the outer Kelly bar 42 , with which the outer Kelly bar 42 and thus the Kelly bar arrangement 40 as a whole can be placed on the drill drive 24 .
  • the Kelly bar arrangement 40 as a whole is suspended from the supporting cable 30 via the inner Kelly bar 50 via a cable suspension 60 .
  • An annular support plate 57 is arranged on its lower end area 54, on which the outer kelly rod 42 and the intermediate kelly rod 48 in the retracted state according to 3 are put on. Furthermore, at the lower end area is 54 the inner Kelly rod 50 is provided with a connecting device 58 for the detachable attachment of the tillage tool 26 . In the illustrated embodiment, this is a square section with a transverse bore for receiving a locking bolt. Furthermore, a damping device 56 can be provided at the lower end region 54 of the inner kelly rod 50, as is shown in FIGS figures 2 and 3 is shown. The damping device 56 can serve to dampen axial impacts when telescoping the Kelly bar arrangement 40 in and out or when placing the tillage tool 26 on the ground.
  • the inner kelly bar 50 and thus the kelly bar arrangement 40 as a whole is suspended from the carrying cable 30 by means of the cable suspension 60 .
  • the carrying cable 30 is provided with a cable eye 63 which is connected to an upper articulation area 62 of the cable suspension 60 via a transverse retaining bolt 61 .
  • a lower articulation area 64 of the cable suspension 60 is connected to the inner kelly rod 50 via a connecting bolt 67 and a connecting piece 65 .
  • a rotary joint for forming a cable swivel 66 is arranged between the upper articulation area 62 and the lower articulation area 64 of the cable suspension 60 . The rotary joint permits rotation about the cable longitudinal axis between the upper articulation area 62 and the lower articulation area 64 in order to prevent twisting of the carrying cable 30 when the drill rod arrangement 40 is driven in rotation.
  • a rotary feedthrough 70 with a lower first connection section 72 and an upper second connection section 74 is arranged in a highly schematic manner on the upper end region 54 of the inner Kelly rod 50 .
  • the inner Kelly bar 50 is non-rotatably connected to the lower first connection section 72, while the upper second connection section 74 is fixedly connected to the connecting piece 65 and the cable suspension 60.
  • the first connection section 72 and the second connection section 74 of the rotary feedthrough 70 are rotatably mounted relative to one another and form a line connection.
  • an upper feed line 36 is provided in a highly schematic manner, which is fed in particular from the drilling device 10 and in particular the superstructure 14 from above the Kelly bar arrangement 40 .
  • the rotary union 70 forms a line connection to a line 55 on the inner kelly rod 50.
  • the line 55 is designed as a fluid line in the cavity 51 of the tubular inner kelly rod 50 in the illustrated embodiment.
  • the supply line 36 can also supply a fluid and, as indicated in the exemplary embodiment shown, can also form a power supply for a rotary device 80 according to the invention with a drive motor 82 .
  • the drive motor 82 is arranged on the upper second connection section 74 of the rotary feedthrough 70 and can rotate this relative to the lower first connection section 72 .
  • a gear arrangement can be provided for this purpose.
  • the rotary feedthrough 70 according to the invention with rotary device 80 makes it possible to ensure that the upper second connecting section 74 with the feed line 36 is stationary even without a fixed support for the upper second connecting section 74, in particular by driving the drive motor 82 in the opposite direction, even if the inner kelly rod 50 is connected to the lower first connection section 72 of the rotary feedthrough 70 is driven in rotation.
  • the Kelly bar arrangement 40 according to the invention with the rotary device 80 thus ensures reliable functioning of the rotary feedthrough 70, even when the Kelly rod arrangement 40 is fully extended and the cable suspension 60 with the rotary feedthrough 70 and the rotary device 80 is located at a lower region of the intermediate Kelly rod 48.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Description

Die Erfindung betrifft eine Kellystangenanordnung für ein Bohrgerät, insbesondere ein Erdbohrgerät, mit einer rohrförmigen Außenkellystange, welche zum Aufliegen auf einem Bohrantrieb und zum Aufnehmen eines Bohrdrehmoments des Bohrantriebs ausgebildet ist, und mit einer Innenkellystange, welche verschiebbar innerhalb der Außenkellystange gelagert ist und eine Seilaufhängung aufweist, wobei zwischen der Außenkellystange und der Innenkellystange das Bohrdrehmoment übertragbar ist, gemäß dem Oberbegriff des Anspruches 1.The invention relates to a Kelly rod arrangement for a drilling device, in particular an earth drilling device, with a tubular outer Kelly rod, which is designed to rest on a drilling drive and to absorb a drilling torque of the drilling drive, and with an inner Kelly rod, which is movably mounted inside the outer Kelly rod and has a cable suspension , wherein the drilling torque can be transmitted between the outer kelly rod and the inner kelly rod, according to the preamble of claim 1.

Eine gattungsbildende Kellystangenanordnung gemäß dem Oberbegriff ist aus der DE 43 33 114 C1 bekannt. Gemäß dieser Offenbarung erfolgt in bekannter Weise die passive Mitnahme des Rotors der Drehdurchführung für das Druckfluid. Diese passive Mitnahme ist in den üblicherweise herrschenden harschen Umgebungsbedingungen im Baustelleneinsatz störanfällig.A generic Kelly bar arrangement according to the preamble is from DE 43 33 114 C1 famous. According to this disclosure, the rotor of the rotary feedthrough for the pressure fluid is passively driven in a known manner. This passive entrainment is prone to failure in the harsh environmental conditions that usually prevail on construction sites.

Die EP 2 821 585 A1 offenbart eine Bohrstangenanordnung, die ebenfalls eine Drehdurchführung für ein Druckfluid umfasst. Auch hier erfolgt ein passives Mitdrehen des Rotors, der gegenüber der Statorhülse mitgeführt wird.the EP 2 821 585 A1 discloses a drill rod assembly that also includes a rotary union for pressurized fluid. Here, too, the rotor rotates passively, which is carried along in relation to the stator sleeve.

Die EP 3 228 756 A1 offenbart eine Baumaschine mit einer Bohrstange. Diese Offenbarung zeigt keine Details zu einer möglichen Druckfluid-Drehdurchführung und stellt damit lediglich einen möglichen Einsatz für Bohrgestänge dar.the EP 3 228 756 A1 discloses a construction machine with a drill rod. This disclosure does not show any details of a possible pressurized fluid rotary union and thus only represents a possible use for drill strings.

Weiterhin betrifft die Erfindung ein Verfahren zur Bodenbearbeitung, bei dem eine Kellystangenanordnung mittels eines Bohrantriebes in eine Drehbewegung versetzt wird, wobei an einer Innenkellystange der Kellystangenanordnung ein Bodenbearbeitungswerkzeug angebracht ist, welches einen Boden bearbeitet, gemäß dem Oberbegriff des Anspruches 12.Furthermore, the invention relates to a method for tilling the soil, in which a Kelly bar arrangement is set in rotary motion by means of a drill drive, with a soil tillage tool being attached to an inner Kelly bar of the Kelly bar arrangement, which tills a soil, according to the preamble of claim 12.

Kellystangenanordnungen für ein Bohrgerät sind im Spezialtiefbau seit langem bekannt. Derartige Kellystangenanordnungen sind teleskopierbar und weisen eine äußere Außenkellystange auf, welche mit einem Bohrantrieb des Bohrgerätes in drehender Verbindung steht. Innerhalb der Außenkellystange sind eine Innenkellystange und gegebenenfalls weitere Zwischenkellystangen angeordnet, welche axial verschiebbar in der Außenkellystange und zueinander gelagert sind. Die Innenkellystange weist eine Seilaufhängung auf, so dass die Innenkellystange und auch die gesamte Kellystangenanordnung an dem Seil gehalten und vertikal verfahren werden kann.Kelly bar arrangements for a drill have long been known in foundation engineering. Such kelly rod arrangements are telescopic and have an outer outer kelly rod which is connected to a drilling drive of the drilling device in a rotating connection. An inner kelly rod and optionally further intermediate kelly rods are arranged inside the outer kelly rod, which are mounted in the outer kelly rod and in relation to one another in an axially displaceable manner. The inner kelly bar has a cable suspension so that the inner kelly bar and also the entire kelly bar arrangement can be held on the cable and moved vertically.

Zur Drehmomentübertragung sind jeweils an den Außen- und Innenseiten der einzelnen Kellystangenelemente axial verlaufende Anschlagsleisten vorgesehen, welche sowohl ein axiales Verfahren als auch eine Drehmomentübertragung in Umfangsrichtung erlauben.For torque transmission, axially running stop strips are provided on the outer and inner sides of the individual Kelly bar elements, which allow both axial displacement and torque transmission in the circumferential direction.

Eine derartige Kellystangenanordnung ermöglicht eine effiziente Seilaufhängung eines Bodenbearbeitungswerkzeuges bei gleichzeitiger Möglichkeit einer Drehmomentübertragung. Darüber hinaus ermöglicht die Teleskopierbarkeit der einzelnen Kellystangenelemente zueinander ein Erreichen von Bearbeitungstiefen, welche größer als eine Höhe des Mastes eines Bohrgerätes sind.Such a Kelly bar arrangement enables efficient cable suspension of a soil cultivation tool with the simultaneous possibility of torque transmission. In addition, the telescoping capability of the individual Kelly bar elements relative to one another makes it possible to reach working depths that are greater than the height of the mast of a drilling rig.

Derartige Kellystangenanordnungen werden zum Arbeiten mit einfachen mechanischen Bodenbearbeitungswerkzeugen eingesetzt, so etwa einem Bohreimer oder einer Bohrschnecke. Problematisch wird der Einsatz einer Kellystangenanordnung, wenn von der Außenseite ein Medium, etwa eine Spülflüssigkeit oder ein Druckfluid, zuzuführen ist.Kelly bar assemblies of this type are used for working with simple mechanical tillage tools, such as a drill bucket or an auger. The use of a Kelly bar arrangement becomes problematic when a medium, such as a flushing liquid or a pressurized fluid, is to be supplied from the outside.

Der Erfindung liegt die Aufgabe zugrunde, eine Kellystangenanordnung und ein Verfahren zur Bodenbearbeitung mit einer Kellystangenanordnung anzugeben, welche besonders vielfältig einsetzbar sind.The invention is based on the object of specifying a Kelly bar arrangement and a method for tilling the soil with a Kelly bar arrangement, which can be used in a particularly diverse manner.

Nach der Erfindung wird die Aufgabe zum einen durch eine Kellystangenanordnung gemäß dem Anspruch 1 und zum anderen durch ein Verfahren gemäß den Merkmalen des Anspruchs 12 gelöst. Bevorzugte Ausführungsformen sind in den abhängigen Ansprüchen angegeben.According to the invention, the object is achieved on the one hand by a Kelly bar arrangement according to claim 1 and on the other hand by a method according to the features of claim 12. Preferred embodiments are given in the dependent claims.

Die erfindungsgemäße Kellystangenanordnung ist dadurch gekennzeichnet, dass an der Innenkellystange mindestens eine Leitung angeordnet ist, dass an einem unteren oder oberen Endbereich der Innenkellystange eine Drehdurchführung mit einem ersten Abschlussabschnitt und einem zweiten Abschlussabschnitt angeordnet ist, wobei der erste Anschlussabschnitt drehfest mit der drehend antreibbaren Kellystange verbunden ist sowie eine Leitungsverbindung zu der mindestens einen Leitung der Innenkellystange bildet und der zweite Anschlussabschnitt mit einer Zuführleitung verbunden ist, welche relativ zur drehend antreibbaren Innenkellystange feststeht, und dass an der Drehdurchführung eine Dreheinrichtung zum aktiven Verdrehen der beiden Anschlussabschnitte relativ zueinander angeordnet ist.The Kelly bar arrangement according to the invention is characterized in that at least one line is arranged on the inner Kelly bar, that a rotary feedthrough with a first end section and a second end section is arranged at a lower or upper end region of the inner Kelly bar, the first connection section being non-rotatably connected to the Kelly bar that can be driven in rotation and forms a line connection to the at least one line of the inner kelly rod and the second connection section is connected to a supply line, which is stationary relative to the inner kelly rod that can be driven in rotation, and that a rotary device for actively rotating the two connection sections relative to one another is arranged on the rotary feedthrough.

Ein erster Aspekt der Erfindung liegt darin, an der Innenkellystange eine Drehdurchführung vorzusehen. Eine Drehdurchführung ist ein Element, welches eine Leitungsverbindung zwischen einem drehenden und einem relativ hierzu feststehenden Teil ermöglicht. Diese Drehdurchführung kann an einem unteren oder oberen Endbereich der Innenkellystange angeordnet sein. Vorzugsweise wird entlang der Innenkellystange mindestens eine Leitung vorgesehen, welche von dem oberen Endbereich zu einem unteren Bereich der Kellystange führt. Alternativ ist die Drehdurchführung an einem unteren Endbereich der Innenkellystange angeordnet, wobei die mit der Innenkellystange mitdrehende Leitung entsprechend kürzer sein kann. Hingegen kann die relativ feststehende Zuführleitung innerhalb des inneren Hohlraums der Innenkellystange von oben bis zum zweiten Anschlussabschnitt der Drehdurchführung am unteren Endbereich geführt sein.A first aspect of the invention is to provide a rotary union on the inner kelly rod. A swivel is an element that enables a line connection between a rotating part and a part that is stationary relative to it. This rotary bushing can be arranged on a lower or upper end area of the inner Kelly rod. At least one line is preferably provided along the inner Kelly bar, which leads from the upper end area to a lower area of the Kelly bar. Alternatively, the rotary leadthrough is arranged on a lower end area of the inner kelly rod, in which case the line rotating with the inner kelly rod can be correspondingly shorter. On the other hand, the relatively fixed feed line can be routed within the inner cavity of the inner kelly rod from above to the second connection section of the rotary feedthrough at the lower end area.

Gemäß einem weiteren Aspekt der Erfindung ist an der Drehdurchführung eine Dreheinrichtung zum aktiven Verdrehen der beiden Anschlussabschnitte relativ zueinander angeordnet. Die Erfindung beruht dabei auf der Erkenntnis, dass das obere Ende der Innenkellystange etwa beim Austeleskopieren der Kellystangenanordnung bis zu einem unteren Endbereich der Außenkellystange verfahren werden kann. So wird eine notwendige zuverlässige mechanische Abstützung der Drehdurchführung gegenüber einem relativ zur drehenden Kellystangenanordnung feststehenden Teil praktisch unmöglich. Es besteht die Gefahr eines Mitdrehens der Zuführleitung mit der drehenden Innenkellystange.According to a further aspect of the invention, a rotary device for actively rotating the two connection sections relative to one another is arranged on the rotary feedthrough. The invention is based on the finding that the upper end of the inner kelly rod can be moved to a lower end region of the outer kelly rod, for example when the kelly rod arrangement is telescoped out. Thus, a necessary reliable mechanical support of the rotary feedthrough against a part that is stationary relative to the rotating Kelly bar arrangement becomes practically impossible. There is a risk of the feed line rotating with the rotating inner kelly rod.

Um eine unerwünschte Verdrehung der stillstehenden Zuführleitung, welche etwa von dem Bohrgerät zu der Drehdurchführung an der Innenkellystange geführt ist, um das Seil, mit welchem die Innenkellystange aufgehängt ist, zu verhindern, wird eine Dreheinrichtung zum aktiven Verdrehen der beiden Anschlussabschnitte relativ zueinander vorgesehen. Hierdurch kann einer unerwünschten Umwicklung der Zuführleitung um das Seil gezielt entgegengewirkt werden.In order to prevent undesired twisting of the stationary supply line, which is routed from the drill to the rotary bushing on the inner kelly rod, for example, in order to prevent the rope with which the inner kelly rod is suspended, a rotary device is provided for actively twisting the two connection sections relative to one another. In this way, an undesired wrapping of the supply line around the cable can be counteracted in a targeted manner.

Auf diese Weise kann eine Kellystangenanordnung mit der vorteilhaften Seilaufhängung und der Teleskopierbarkeit bei gleichzeitiger Drehmomentübertragung auch für Bodenbearbeitungswerkzeuge eingesetzt werden, bei welchen die Zuführung eines Fluides, von Energie oder Daten über eine Zuführleitung von außen notwendig oder gewünscht ist.In this way, a Kelly bar arrangement with the advantageous cable suspension and the telescoping capability with simultaneous torque transmission can also be used for tillage tools in which the supply of a fluid, energy or data via a supply line from the outside is necessary or desired.

Grundsätzlich kann die Drehdurchführung an einer beliebigen Stelle an dem oberen Endbereich der Innenkellystange angeordnet sein. Besonders vorteilhaft ist es nach einer Ausführungsvariante der Erfindung, dass die Drehdurchführung an der Innenkellystange unterhalb der Seilaufhängung angeordnet ist. Die Drehdurchführung kann dabei ringförmig ausgebildet sein, wobei die Seilaufhängung so in einem Mittenbereich der Drehdurchführung angeordnet werden kann.In principle, the rotary feedthrough can be arranged at any point on the upper end area of the inner kelly rod. According to one embodiment variant of the invention, it is particularly advantageous that the rotary leadthrough is arranged on the inner kelly rod below the cable suspension. The rotary feedthrough can be ring-shaped, with the cable suspension being able to be arranged in a central area of the rotary feedthrough.

Eine weitere bevorzugte Ausführungsform der Erfindung besteht darin, dass die Dreheinrichtung zumindest einen Antriebsmotor zum aktiven Verdrehen des zweiten Anschlussabschnittes relativ zum ersten Anschlussabschnitt aufweist. Grundsätzlich können auch weitere Antriebsmotoren vorgesehen sein.A further preferred embodiment of the invention is that the rotating device has at least one drive motor for actively rotating the second connection section relative to the first connection section. In principle, further drive motors can also be provided.

Dabei ist es besonders bevorzugt, dass der Antriebsmotor an dem zweiten Anschlussabschnitt angeordnet ist, welcher oberhalb des ersten Anschlussabschnittes liegt. Es besteht so eine gute Zugänglichkeit zu dem Antriebsmotor. Zudem kann eine Energiezuführung zu dem Antriebsmotor parallel oder mit der Zuführleitung erfolgen.It is particularly preferred that the drive motor is arranged on the second connection section, which lies above the first connection section. There is good accessibility to the drive motor. In addition, energy can be supplied to the drive motor in parallel or with the supply line.

Für eine kompakte Bauweise ist es insgesamt vorteilhaft, dass der Antriebsmotor ein Elektromotor oder ein Hydraulikmotor ist. Der Antriebsmotor kann dabei insgesamt sehr kompakt ausgebildet sein, da ein Aufbringen nur relativ geringer Drehmomente für die notwendige Kompensation der Drehbewegung zwischen den beiden Anschlussabschnitten notwendig ist. Grundsätzlich kann auch ein Druckluftmotor vorgesehen sein.For a compact design, it is generally advantageous that the drive motor is an electric motor or a hydraulic motor. In this case, the drive motor can be designed to be very compact overall, since only relatively low torques have to be applied for the necessary compensation for the rotational movement between the two connection sections. In principle, a compressed air motor can also be provided.

Eine weitere vorteilhafte Ausgestaltung der Erfindung besteht darin, dass die Seilaufhängung einen Seilwirbel aufweist. Ein Seilwirbel im Sinne der Erfindung ist ein Drehgelenk, welches eine Verdrehbarkeit einer unteren Anlenkung des Seilwirbels zur Innenkellystange gegenüber einer oberen Anlenkung des Seilwirbels zum Aufhängseil ermöglicht. Mit einem Seilwirbel kann sichergestellt werden, dass sich eine Drehbewegung der Innenkellystange, welche an der unteren Anlenkung des Seilwirbels angehängt ist, nicht auf den oberen Teil des Seilwirbels und damit auf den Rest des Seiles übertragen kann. Auf diese Weise kann ein Verdrillen des Aufhängseiles zuverlässig vermieden werden.A further advantageous embodiment of the invention is that the cable suspension has a cable swivel. A swivel within the meaning of the invention is a swivel joint which enables a lower linkage of the swivel to the inner kelly rod to be twisted in relation to an upper linkage of the swivel to the suspension rope. A rope swivel can be used to ensure that a rotary movement of the inner kelly rod, which is attached to the lower linkage of the rope swivel, cannot be transferred to the upper part of the rope swivel and thus to the rest of the rope. In this way, twisting of the suspension cable can be reliably avoided.

Grundsätzlich kann die Leitung der Innenkellystange als eine Hohlleitung, etwa ein Schlauch oder ein Rohr oder als ein Kabel zum Leiten von elektrischem Strom oder von Daten ausgebildet sein. Besonders zweckmäßig ist es nach einer Weiterbildung der Erfindung, dass als eine Leitung ein axialer Hohlraum der Innenkellystange vorgesehen ist, welcher zum Durchleiten eines Fluides ausgebildet ist. Das Fluid kann dabei insbesondere eine Spülflüssigkeit oder eine Betonsuspension sein. Am unteren Ende der Innenkellystange kann ein Anschlussbereich vorgesehen sein, mit welchem ein Leitungsanschluss zu einem am unteren Ende der Innenkellystange angebrachten Bodenbearbeitungswerkzeuges, insbesondere eines Bohrwerkzeuges, ermöglicht ist.In principle, the line of the inner Kelly rod can be designed as a hollow line, for example a hose or a tube or as a cable for conducting electrical current or data. According to a further development of the invention, it is particularly expedient that an axial cavity of the inner Kelly rod is provided as a line, which cavity is designed for the passage of a fluid. The fluid can in particular be a flushing liquid or a concrete suspension. A connection area can be provided at the lower end of the inner kelly rod, with which a line connection to a soil cultivation tool, in particular a drilling tool, attached to the lower end of the inner kelly rod is made possible.

Weiterhin ist es nach einer Ausführungsvariante der Erfindung bevorzugt, dass als eine Leitung an der Innenkellystange ein Kabel vorgesehen ist, welches zum Leiten von Strom und/oder Daten ausgebildet ist. Das Kabel kann dabei als eine zusätzliche Leitung entlang des axialen Hohlraumes der Innenkellystange geführt sein. Bei einem Leiten von Strom oder Daten ist die Drehdurchführung alleine oder zusätzlich mit entsprechenden Kontaktringen an den beiden Anschlussabschnitten ausgebildet, welche während einer Drehbewegung einen reibenden Kontakt zur Strom- oder Datenübertragung sicherstellt.Furthermore, according to one embodiment variant of the invention, it is preferred that a cable is provided as a line on the inner kelly rod, which cable is designed to conduct electricity and/or data. The cable can be routed as an additional line along the axial cavity of the inner Kelly rod. When conducting power or data, the rotary feedthrough is designed alone or additionally with corresponding contact rings on the two connection sections, which ensure frictional contact for power or data transmission during a rotary movement.

Weiterhin umfasst die Erfindung ein Bohrgerät, insbesondere ein Erdbohrgerät, mit einem Bohrantrieb, wobei die zuvor beschriebene erfindungsgemäße Kellystangenanordnung vorgesehen ist. Der Bohrantrieb ist dabei vorzugsweise ringartig mit einem Durchgang ausgebildet, durch welchen die Außenkellystange der Kellystangenanordnung hindurchgeführt ist. Der ringförmige Drehantrieb weist dabei ein ringförmiges Antriebsrad auf, welches an seiner Innenseite mit Antriebsvorsprüngen versehen ist. Diese wirken zur Drehmomentübertragung in bekannter Weise mit axialen Antriebsleisten an der Außenseite der Außenkellystange zusammen.The invention also includes a drilling device, in particular an earth drilling device, with a drilling drive, the Kelly bar arrangement according to the invention described above being provided. The drill drive is preferably designed in the form of a ring with a passage through which the outer Kelly bar of the Kelly bar arrangement is guided. The ring-shaped rotary drive has a ring-shaped drive wheel, which is provided with drive projections on its inside. For torque transmission, these interact in a known manner with axial drive rails on the outside of the outer kelly rod.

Grundsätzlich kann in einer einfachen Ausführung der Kellystangenanordnung lediglich eine Außenkellystange und eine Innenkellystange vorgesehen sein. Zwischen der Außenkellystange und der Innenkellystange können jedoch auch eine oder mehrere Zwischenkellystangenelemente angeordnet sein, wobei sich die entsprechende maximale Teleskopierlänge der Kellystangenanordnung entsprechend vergrößert.Basically, in a simple embodiment of the Kelly bar arrangement, only one outer Kelly bar and one inner Kelly bar can be provided. However, one or more intermediate kelly rod elements can also be arranged between the outer kelly rod and the inner kelly rod, with the corresponding maximum telescoping length of the kelly rod arrangement increasing accordingly.

Besonders bevorzugt ist es nach der Erfindung, dass eine Steuerung für die Dreheinrichtung vorgesehen ist und dass ein Drehaufnehmer zum Bestimmen einer Drehzahl und/oder einer Drehrichtung zumindest der Innenkellystange vorgesehen ist, welcher mit der Steuerung in Signalverbindung steht. Durch die Steuerung kann die Dreheinrichtung und damit der Antriebsmotor stets so angesteuert werden, dass der obere zweite Anschlussabschnitt der Drehdurchführung möglichst relativ zu der drehenden Innenkellystange fest steht.It is particularly preferred according to the invention that a controller is provided for the rotary device and that a rotary sensor is provided for determining a speed and/or a direction of rotation of at least the inner Kelly rod, which is in signal communication with the controller. The rotary device and thus the drive motor can always be controlled by the controller in such a way that the upper second connection section of the rotary feedthrough is as fixed as possible relative to the rotating inner Kelly rod.

Besonders bevorzugt ist es nach einer Weiterbildung der Erfindung, dass die Dreheinrichtung durch die Steuereinrichtung gesteuert angetrieben ist, so dass der zweite Anschlussabschnitt der Drehdurchführung gegengleich zu einer Drehbewegung der Innenkellystange angetrieben und synchronisiert ist. Es erfolgt also eine exakte Kompensation der Drehbewegung der Innenkellystange, so dass durch die gegengleiche Drehbewegung durch die Dreheinrichtung ein gewünschter Stillstand des zweiten Anschlussabschnittes mit der Zuführleitung erreicht wird, welche grundsätzlich ebenfalls eine Fluidleitung und/oder ein Kabel sein kann.According to a development of the invention, it is particularly preferred that the rotary device is driven in a controlled manner by the control device, so that the second connection section of the rotary feedthrough is driven and synchronized in the opposite direction to a rotary movement of the inner Kelly rod. Exact compensation of the rotary movement of the inner kelly rod takes place, so that the opposite rotary movement by the rotary device achieves a desired standstill of the second connection section with the feed line, which in principle can also be a fluid line and/or a cable.

Das erfindungsgemäße Verfahren zur Bodenbearbeitung, welches insbesondere mit dem zuvor beschriebenen Bohrgerät ausgeführt werden kann, ist dadurch gekennzeichnet, dass eine Dreheinrichtung zum aktiven Verdrehen des zweiten Anschlussabschnittes relativ zum ersten Anschlussabschnitt vorgesehen ist, wobei der zweite Anschlussabschnitt gegengleich zu einer Drehbewegung der Innenkellystange betrieben wird.The method for soil cultivation according to the invention, which can be carried out in particular with the drilling device described above, is characterized in that a rotary device is provided for actively rotating the second connection section relative to the first connection section, with the second connection section being operated in the opposite direction to a rotary movement of the inner kelly rod.

Mit dem Verfahren kann so ein völliger oder weitgehender Stillstand des zweiten Anschlussabschnittes, an welchem die obere Zuführleitung angebracht ist, relativ zu dem drehenden ersten Anschlussabschnitt an der Innenkellystange erreicht werden, ohne dass aufwendige mechanische Abstützungen notwendig sind oder dass die Gefahr eines Verdrillens des Tragseils oder ein Umwickeln der Zuführleitung um das Tragseil gegeben ist.With the method, a complete or extensive standstill of the second connection section, to which the upper feed line is attached, can be achieved relative to the rotating first connection section on the inner kelly rod, without the need for complex mechanical supports or the risk of the support cable twisting or the supply line is wrapped around the suspension cable.

Das Verfahren wird dabei mit der zuvor beschriebenen erfindungsgemäßen Kellystangenanordnung durchgeführt.The method is carried out with the Kelly bar arrangement according to the invention described above.

Eine besonders genaue Abstimmung der Drehbewegung kann nach einer Weiterbildung der Erfindung dadurch erzielt werden, dass die Dreheinrichtung abhängig von der Drehzahl der Innenkellystange oder des Bohrantriebs betrieben wird. Eine Drehzahleinstellung des Bohrantriebs kann als Vorgabe unmittelbar für die Dreheinrichtung genutzt werden. Alternativ kann die Drehzahl der Innenkellystange oder des Bohrantriebs von einem Drehaufnehmer erfasst und zum Steuern der Dreheinrichtung verwendet werden.A particularly precise coordination of the rotary movement can be achieved according to a further development of the invention in that the rotary device depends on the speed of the inner Kelly rod or the drill drive is operated. A speed setting of the drill drive can be used directly as a specification for the rotating device. Alternatively, the speed of the inner Kelly rod or the drill drive can be detected by a rotary pick-up and used to control the rotary device.

Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispiels weiter beschrieben, welches schematisch in den Zeichnungen dargestellt ist. In den Zeichnungen zeigen:

Fig. 1
eine Seitenansicht eines Bohrgerätes mit einer erfindungsgemäßen Kellystangenanordnung;
Fig. 2
eine erfindungsgemäße Kellystangenanordnung in einem teilweise ausgefahrenen Zustand;
Fig. 3
die Kellystangenanordnung von Fig. 2 in einem eingefahrenen Zustand, und
Fig. 4
eine vergrößerte Teilquerschnittsdarstellung eines oberen Bereiches der erfindungsgemäßen Kellystangenanordnung.
The invention is further described below with reference to a preferred exemplary embodiment, which is illustrated schematically in the drawings. In the drawings show:
1
a side view of a drill with a Kelly bar assembly according to the invention;
2
a Kelly bar assembly according to the invention in a partially extended condition;
3
the kelly bar arrangement of 2 in a retracted state, and
4
an enlarged partial cross-sectional view of an upper portion of the Kelly bar assembly according to the invention.

Ein Bohrgerät 10 gemäß Fig. 1 umfasst ein Raupenfahrwerk als Unterwagen 12, auf welchem drehbar ein Oberwagen 14 gelagert ist. An dem Oberwagen 14 ist ein im Wesentlichen vertikaler Mast 20 schwenkbar angelenkt und mittels einer Stellanordnung 18 mit Hydraulikzylindern hinsichtlich einer Mastneigung verstellbar. An einem oberen Ende des Mastes 20 ist ein Mastkopf 22 angebracht, über welchen ein Tragseil 30 bis zu einer Winde 16 am Oberwagen 14 geführt ist.A drill 10 according to FIG 1 includes a crawler chassis as an undercarriage 12, on which a superstructure 14 is rotatably mounted. A substantially vertical mast 20 is pivoted on the superstructure 14 and can be adjusted with regard to a mast inclination by means of an adjusting arrangement 18 with hydraulic cylinders. Attached to an upper end of the mast 20 is a mast head 22 over which a carrying cable 30 is guided to a winch 16 on the superstructure 14 .

Mittels einer Seilaufhängung 60 ist an dem Tragseil 30 eine erfindungsgemäße Kellystangenanordnung 40 angehängt. Die Kellystangenanordnung 40 ist in grundsätzlich bekannter Weise durch einen ringförmigen Bohrantrieb 24 hindurchgeführt, welcher auch als Kraftdrehkopf bezeichnet wird und an einem Schlitten 25 vertikal verfahrbar entlang einer Führung an einer Vorderseite des Mastes 20 gelagert ist. An einem unteren Ende der Kellystangenanordnung 40 ist ein Bodenbearbeitungswerkzeug 26 angebracht, welches im dargestellten Ausführungsbeispiel als ein Bohreimer mit unteren Abtragszähnen ausgeführt ist. Über die Winde 16 und das Tragseil 30 kann in grundsätzlich bekannter Weise die Kellystangenanordnung 40 relativ zum Bohrantrieb 24 in vertikaler Richtung verfahren werden.A Kelly bar arrangement 40 according to the invention is suspended from the supporting cable 30 by means of a cable suspension 60 . The Kelly bar arrangement 40 is guided in a basically known manner through an annular drill drive 24 , which is also referred to as a top drive and is mounted on a carriage 25 so that it can be moved vertically along a guide on a front side of the mast 20 . Attached to a lower end of the Kelly bar arrangement 40 is a tillage tool 26 which, in the exemplary embodiment shown, is designed as a drilling bucket with lower removal teeth. About the winch 16 and the suspension cable 30 can in principle in a known manner, the Kelly bar arrangement 40 can be moved in the vertical direction relative to the drill drive 24 .

Die erfindungsgemäße Kellystangenanordnung 40 ermöglicht das Aufhängen eines Bodenbearbeitungswerkzeuges 26 an einem Seil bei gleichzeitiger Möglichkeit der Übertragung eines Drehmomentes von dem Bohrantrieb 24 auf das Bodenbearbeitungswerkzeug 26.The Kelly bar arrangement 40 according to the invention enables a soil cultivation tool 26 to be suspended from a cable while at the same time enabling torque to be transmitted from the drill drive 24 to the soil cultivation tool 26.

Der Aufbau der erfindungsgemäßen Kellystangenanordnung 40 wird näher im Zusammenhang mit den Figuren 2 bis 4 erläutert. Die Darstellung von Fig. 3 ist dabei um 90° gedreht zu den Darstellungen zu den Figuren 2 und 4.The structure of the Kelly bar assembly 40 according to the invention is explained in more detail in connection with the Figures 2 to 4 explained. The representation of 3 is rotated by 90° to the representations of the figures 2 and 4 .

Bei dem dargestellten Ausführungsbeispiel weist die Kellystangenanordnung 40 eine Außenkellystange 42 mit äußeren Antriebsleisten 46, eine Innenkellystange 50 mit äußeren Antriebsleisten 53 und eine dazwischenliegende Zwischenkellystange 48 mit äußeren Antriebsleisten 49 auf. Die Außenkellystange 42, die Zwischenkellystange 48 und die Innenkellystange 50 sind jeweils zueinander axial verschiebbar, wobei über nicht dargestellte axiale innere Antriebsleisten das Drehmoment jeweils in grundsätzlich bekannter Weise von der Außenkellystange 42 auf die Zwischenkellystange 48 und von dieser auf die Innenkellystange 50 unabhängig von der jeweiligen axialen Stellposition übertragen werden kann. Weiterhin können an den einzelnen Stangenelementen Verriegelungstaschen vorgesehen sein, so dass in einem verriegelten Zustand über die Kellystangenanordnung 40 auch in gewissem Umfang Axialkräfte übertragen werden können.In the illustrated embodiment, the kelly bar assembly 40 includes an outer kelly bar 42 with outer drive bars 46, an inner kelly bar 50 with outer drive bars 53, and an intermediate kelly bar 48 with outer drive bars 49 therebetween. The outer kelly rod 42, the intermediate kelly rod 48 and the inner kelly rod 50 are each axially displaceable with respect to one another, with the torque being transferred in a basically known manner from the outer kelly rod 42 to the intermediate kelly rod 48 and from this to the inner kelly rod 50 independently of the respective axial adjustment position can be transmitted. Furthermore, locking pockets can be provided on the individual rod elements, so that axial forces can also be transmitted to a certain extent via the Kelly rod arrangement 40 in a locked state.

An einem oberen Bereich der Außenkellystange 42 ist ein hülsenförmiger Auflageabschnitt 44 mit einer radialen Auflagefläche vorgesehen, mit welchem die Außenkellystange 42 und damit die Kellystangenanordnung 40 insgesamt auf dem Bohrantrieb 24 aufgesetzt werden kann.A sleeve-shaped support section 44 with a radial support surface is provided in an upper region of the outer Kelly bar 42 , with which the outer Kelly bar 42 and thus the Kelly bar arrangement 40 as a whole can be placed on the drill drive 24 .

Die Kellystangenanordnung 40 insgesamt ist über die Innenkellystange 50 über eine Seilaufhängung 60 an dem Tragseil 30 aufgehängt.The Kelly bar arrangement 40 as a whole is suspended from the supporting cable 30 via the inner Kelly bar 50 via a cable suspension 60 .

An ihrem unteren Endbereich 54 ist eine ringförmige Auflageplatte 57 angeordnet, auf welche die Außenkellystange 42 und die Zwischenkellystange 48 in dem eingefahrenen Zustand gemäß Fig. 3 aufgesetzt sind. Weiterhin ist am unteren Endbereich 54 der Innenkellystange 50 eine Verbindungseinrichtung 58 zum lösbaren Befestigen des Bodenbearbeitungswerkzeuges 26 vorgesehen. Im dargestellten Ausführungsbeispiel ist dies ein Vierkantabschnitt mit einer quergerichteten Bohrung zur Aufnahme eines Verriegelungsbolzens. Weiterhin kann am unteren Endbereich 54 der Innenkellystange 50 eine Dämpfungseinrichtung 56 vorgesehen sein, wie dies in den Figuren 2 und 3 dargestellt ist. Die Dämpfungseinrichtung 56 kann zum Abdämpfen von axialen Schlägen beim Ein- und Austeleskopieren der Kellystangenanordnung 40 oder beim Aufsetzen des Bodenbearbeitungswerkzeuges 26 auf dem Boden dienen.An annular support plate 57 is arranged on its lower end area 54, on which the outer kelly rod 42 and the intermediate kelly rod 48 in the retracted state according to 3 are put on. Furthermore, at the lower end area is 54 the inner Kelly rod 50 is provided with a connecting device 58 for the detachable attachment of the tillage tool 26 . In the illustrated embodiment, this is a square section with a transverse bore for receiving a locking bolt. Furthermore, a damping device 56 can be provided at the lower end region 54 of the inner kelly rod 50, as is shown in FIGS figures 2 and 3 is shown. The damping device 56 can serve to dampen axial impacts when telescoping the Kelly bar arrangement 40 in and out or when placing the tillage tool 26 on the ground.

An ihrem oberen Endbereich 52 ist die Innenkellystange 50 und damit die Kellystangenanordnung 40 insgesamt an dem Tragseil 30 mittels der Seilaufhängung 60 aufgehängt. In dem dargestellten Ausführungsbeispiel ist, wie insbesondere aus Fig. 4 zu ersehen ist, das Tragseil 30 mit einem Seilauge 63 versehen, welches über einen quergerichteten Haltebolzen 61 mit einem oberen Anlenkbereich 62 der Seilaufhängung 60 verbunden ist. Ein unterer Anlenkbereich 64 der Seilaufhängung 60 ist über einen Verbindungsbolzen 67 und ein Verbindungsstück 65 mit der Innenkellystange 50 verbunden. Zwischen dem oberen Anlenkbereich 62 und dem unteren Anlenkbereich 64 der Seilaufhängung 60 ist ein Drehgelenk zum Bilden eines Seilwirbels 66 angeordnet. Das Drehgelenk erlaubt eine Drehung um die Seillängsachse zwischen dem oberen Anlenkbereich 62 und dem unteren Anlenkbereich 64, um ein Verdrillen des Tragseils 30 bei einem rotierenden Antrieb der Bohrgestängeanordnung 40 zu verhindern.At its upper end area 52 the inner kelly bar 50 and thus the kelly bar arrangement 40 as a whole is suspended from the carrying cable 30 by means of the cable suspension 60 . In the illustrated embodiment, as in particular 4 it can be seen that the carrying cable 30 is provided with a cable eye 63 which is connected to an upper articulation area 62 of the cable suspension 60 via a transverse retaining bolt 61 . A lower articulation area 64 of the cable suspension 60 is connected to the inner kelly rod 50 via a connecting bolt 67 and a connecting piece 65 . A rotary joint for forming a cable swivel 66 is arranged between the upper articulation area 62 and the lower articulation area 64 of the cable suspension 60 . The rotary joint permits rotation about the cable longitudinal axis between the upper articulation area 62 and the lower articulation area 64 in order to prevent twisting of the carrying cable 30 when the drill rod arrangement 40 is driven in rotation.

An dem oberen Endbereich 54 der Innenkellystange 50 ist stark schematisiert eine Drehdurchführung 70 mit einem unteren ersten Anschlussabschnitt 72 und einem oberen zweiten Anschlussabschnitt 74 angeordnet. Die Innenkellystange 50 ist drehfest mit dem unteren ersten Anschlussabschnitt 72 verbunden, während der obere zweite Anschlussabschnitt 74 fest mit dem Verbindungsstück 65 und der Seilaufhängung 60 verbunden ist. Der erste Anschlussabschnitt 72 und der zweite Anschlussabschnitt 74 der Drehdurchführung 70 sind drehbar zueinander gelagert und bilden eine Leitungsverbindung.A rotary feedthrough 70 with a lower first connection section 72 and an upper second connection section 74 is arranged in a highly schematic manner on the upper end region 54 of the inner Kelly rod 50 . The inner Kelly bar 50 is non-rotatably connected to the lower first connection section 72, while the upper second connection section 74 is fixedly connected to the connecting piece 65 and the cable suspension 60. The first connection section 72 and the second connection section 74 of the rotary feedthrough 70 are rotatably mounted relative to one another and form a line connection.

Dabei ist stark schematisiert eine obere Zuführleitung 36 vorgesehen, welche insbesondere von dem Bohrgerät 10 und insbesondere dem Oberwagen 14 von oberhalb der Kellystangenanordnung 40 zugeführt ist. Die Drehdurchführung 70 bildet dabei eine Leitungsverbindung zu einer Leitung 55 an der Innenkellystange 50. Die Leitung 55 ist in dem dargestellten Ausführungsbeispiel als eine Fluidleitung im Hohlraum 51 der rohrförmigen Innenkellystange 50 ausgebildet. Die Zuführleitung 36 kann dabei ebenfalls ein Fluid zuführen und, wie im dargestellten Ausführungsbeispiel angedeutet ist, ebenso eine Stromzuführung für eine erfindungsgemäße Dreheinrichtung 80 mit einem Antriebsmotor 82 bilden. Dabei ist der Antriebsmotor 82 an dem oberen zweiten Anschlussabschnitt 74 der Drehdurchführung 70 angeordnet und kann diesen relativ gegenüber dem unteren ersten Anschlussabschnitt 72 verdrehen. Hierzu kann eine Zahnradanordnung vorgesehen sein.In this case, an upper feed line 36 is provided in a highly schematic manner, which is fed in particular from the drilling device 10 and in particular the superstructure 14 from above the Kelly bar arrangement 40 . The rotary union 70 forms a line connection to a line 55 on the inner kelly rod 50. The line 55 is designed as a fluid line in the cavity 51 of the tubular inner kelly rod 50 in the illustrated embodiment. The supply line 36 can also supply a fluid and, as indicated in the exemplary embodiment shown, can also form a power supply for a rotary device 80 according to the invention with a drive motor 82 . In this case, the drive motor 82 is arranged on the upper second connection section 74 of the rotary feedthrough 70 and can rotate this relative to the lower first connection section 72 . A gear arrangement can be provided for this purpose.

Durch die erfindungsgemäße Drehdurchführung 70 mit Dreheinrichtung 80 kann auch ohne eine feste Abstützung des oberen zweiten Anschlussabschnittes 74 insbesondere durch ein gesteuertes gegengleiches Antreiben des Antriebsmotors 82 ein Stillstand des oberen zweiten Anschlussabschnittes 74 mit der Zuführleitung 36 sichergestellt werden, auch wenn die Innenkellystange 50 mit dem unteren ersten Anschlussabschnitt 72 der Drehdurchführung 70 drehend angetrieben wird.The rotary feedthrough 70 according to the invention with rotary device 80 makes it possible to ensure that the upper second connecting section 74 with the feed line 36 is stationary even without a fixed support for the upper second connecting section 74, in particular by driving the drive motor 82 in the opposite direction, even if the inner kelly rod 50 is connected to the lower first connection section 72 of the rotary feedthrough 70 is driven in rotation.

Die erfindungsgemäße Kellystangenanordnung 40 mit der Dreheinrichtung 80 stellt somit eine zuverlässige Funktionsweise der Drehdurchführung 70 sicher, selbst wenn die Kellystangenanordnung 40 ganz austeleskopiert ist und sich die Seilaufhängung 60 mit der Drehdurchführung 70 und der Dreheinrichtung 80 an einem unteren Bereich der Zwischenkellystange 48 befindet.The Kelly bar arrangement 40 according to the invention with the rotary device 80 thus ensures reliable functioning of the rotary feedthrough 70, even when the Kelly rod arrangement 40 is fully extended and the cable suspension 60 with the rotary feedthrough 70 and the rotary device 80 is located at a lower region of the intermediate Kelly rod 48.

Claims (13)

  1. Kelly bar arrangement for a drilling apparatus (10), in particular an earth drilling apparatus, with a tubular outer Kelly bar (42), which is designed for bearing on a drill drive (24) and for receiving a drilling torque of the drill drive (24), and
    with an inner Kelly bar (50), which is displaceably supported inside the outer Kelly bar (42) and has a rope suspension (60), wherein the drilling torque can be transmitted between the outer Kelly bar (42) and the inner Kelly bar (50), characterized in that
    on the inner Kelly bar (50) at least one line (55) is arranged,
    in that in a lower or upper end region (52) of the inner Kelly bar (50) a rotary feedthrough (70) with a first attachment section (72) and a second attachment section (74) is arranged, wherein the first attachment section (72) is connected in a torque-proof manner to the rotationally drivable inner Kelly bar (50) and forms a line connection to the at least one line (55) of the inner Kelly bar (50) and the second attachment section (74) is connected to a supply line (36) which is stationary relative to the rotationally drivable inner Kelly bar (50), and
    in that on the rotary feedthrough (70) a rotary means (80) is arranged for actively rotating the two attachment sections (72,74) relative to each other.
  2. Kelly bar arrangement according to claim 1,
    characterized in that
    the rotary feedthrough (70) is arranged on the inner Kelly bar (50) below the rope suspension (60).
  3. Kelly bar arrangement according to any one of claims 1 or 2,
    characterized in that
    the rotary means (80) has at least a drive motor (82) for actively rotating the second attachment section (74) relative to the first attachment section (72).
  4. Kelly bar arrangement according to claim 3,
    characterized in that
    the drive motor (82) is arranged on the second attachment section (74) which lies above the first attachment section (72).
  5. Kelly bar arrangement according to claim 3 or 4,
    characterized in that
    the drive motor (82) is an electric motor or a hydraulic motor.
  6. Kelly bar arrangement according to any one of claims 1 to 5,
    characterized in that
    the rope suspension (60) has a rope swivel (66).
  7. Kelly bar arrangement according to any one of claims 1 to 6,
    characterized in that
    as a line (55) an axial hollow space (51) of the inner Kelly bar (50) is provided which is designed for passing a fluid through.
  8. Kelly bar arrangement according to any one of claims 1 to 7,
    characterized in that
    as a line (55) on the inner Kelly bar (50) a cable is provided which is designed for conducting electricity and/or data.
  9. Drilling apparatus, in particular earth drilling apparatus, with a drill drive (24),
    characterized in that
    a Kelly bar arrangement (40) according to any one of claims 1 to 8 is arranged.
  10. Drilling apparatus according to claim 9,
    characterized in that
    a control is provided for the rotary means (80) and
    in that a rotation detector is provided for determining a rotational speed and/or a direction of rotation at least of the inner Kelly bar (50), which is in signal connection with the control.
  11. Drilling apparatus according to claim 9 or 10,
    characterized in that
    the rotary means (80) is driven in a controlled manner by the control means such that the second attachment section (74) of the rotary feedthrough (70) is driven and synchronized in a diametrically opposed manner to a rotating motion of the inner Kelly bar (50).
  12. Method for working the ground with a drilling apparatus (10) according to any one of claims 9 to 11, in which a Kelly bar arrangement (40) is set into rotating motion by means of a drill drive (24), wherein on an inner Kelly bar (50) of the Kelly bar arrangement (40) a ground working tool (26) is mounted which works a ground,
    characterized in that
    a rotary means (80) is provided for actively rotating the second attachment section (74) relative to the first attachment section (72), wherein the second attachment section (74) is operated in a diametrically opposed manner to a rotating motion of the inner Kelly bar (50).
  13. Method according to claim 12,
    characterized in that
    the rotary means (80) is operated depending on a rotational speed of the inner Kelly bar (50) or the drill drive (24).
EP20750664.3A 2019-08-16 2020-08-04 Kelly bar assembly for a drill and method for working soil Active EP3877624B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19192058.6A EP3779117A1 (en) 2019-08-16 2019-08-16 Kelly bar assembly for a drill and method for working soil
PCT/EP2020/071850 WO2021032461A1 (en) 2019-08-16 2020-08-04 Kelly bar arrangement for a drilling device and method for working the ground

Publications (2)

Publication Number Publication Date
EP3877624A1 EP3877624A1 (en) 2021-09-15
EP3877624B1 true EP3877624B1 (en) 2022-04-20

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EP19192058.6A Withdrawn EP3779117A1 (en) 2019-08-16 2019-08-16 Kelly bar assembly for a drill and method for working soil
EP20750664.3A Active EP3877624B1 (en) 2019-08-16 2020-08-04 Kelly bar assembly for a drill and method for working soil

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US (1) US11939821B2 (en)
EP (2) EP3779117A1 (en)
CN (1) CN114127382B (en)
AU (1) AU2020333796B2 (en)
CA (1) CA3138200C (en)
SG (1) SG11202111447YA (en)
WO (1) WO2021032461A1 (en)

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Also Published As

Publication number Publication date
EP3779117A1 (en) 2021-02-17
CN114127382B (en) 2024-05-07
WO2021032461A8 (en) 2022-01-20
AU2020333796B2 (en) 2022-09-15
SG11202111447YA (en) 2021-11-29
WO2021032461A1 (en) 2021-02-25
CA3138200A1 (en) 2021-02-25
US20220220814A1 (en) 2022-07-14
CN114127382A (en) 2022-03-01
AU2020333796A1 (en) 2021-11-18
AU2020333796A9 (en) 2022-02-17
CA3138200C (en) 2023-09-19
US11939821B2 (en) 2024-03-26
EP3877624A1 (en) 2021-09-15

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