EP2520756A1 - Mast element for a drill - Google Patents

Mast element for a drill Download PDF

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Publication number
EP2520756A1
EP2520756A1 EP11003710A EP11003710A EP2520756A1 EP 2520756 A1 EP2520756 A1 EP 2520756A1 EP 11003710 A EP11003710 A EP 11003710A EP 11003710 A EP11003710 A EP 11003710A EP 2520756 A1 EP2520756 A1 EP 2520756A1
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EP
European Patent Office
Prior art keywords
mast
mast element
core
longitudinal guide
drill
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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.)
Granted
Application number
EP11003710A
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German (de)
French (fr)
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EP2520756B1 (en
Inventor
Lars Rietz
Carl Dr.-Ing. Hagemeyer
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Klemm Bohrtechnik GmbH
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Klemm Bohrtechnik GmbH
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Priority to EP20110003710 priority Critical patent/EP2520756B1/en
Publication of EP2520756A1 publication Critical patent/EP2520756A1/en
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Publication of EP2520756B1 publication Critical patent/EP2520756B1/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
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts

Definitions

  • the invention relates to a mast element for a drill with a mast core and at least one longitudinal guide, which is arranged for guiding a carriage along the mast element to the mast core, according to the preamble of patent claim 1.
  • Drilling devices with such mast elements are used for example in the field of special civil engineering.
  • the mast of such a drill may be constructed from one or more mast elements.
  • the drill string is arranged, which is rotationally driven by means of a drill drive and moved along the mast.
  • the length of the mast is a limitation on the length of the drill pipe.
  • the invention has for its object to provide a mast element for a drill, with which also larger drilling depths can be achieved in an efficient and safe manner.
  • the mast element according to the invention is characterized in that the mast core has a tubular body, which is formed from a fiber composite material.
  • a basic idea of the invention is to reduce the weight of a mast element by departing from the previous metal construction. This is achieved according to the invention in that the mast core is formed as a tubular body of a fiber composite material. Compared to conventional mast elements, even if these are constructed in lattice structure, weight savings of up to 40% and more can be achieved. By such a lightweight mast structure, the center of gravity of the entire drill remains relatively close to the ground, even with larger mast heights, so that the risk of tipping is significantly reduced.
  • the tubular body may have any cross-sectional shape, such as an oval or polygonal shape.
  • a particularly good stability is inventively achieved in that the tubular body has a circular or rectangular cross-sectional profile. With such an annular closed cross-sectional profile a high buckling stiffness is achieved with a low weight.
  • fiber composite materials can be provided for producing the mast core.
  • glass fibers or various plastic fibers are possible.
  • the fiber composites can be used with known laminate or honeycomb structure alone or in combination with other fiber composites or other ceramic or metal materials.
  • CFRP carbon fiber reinforced plastic
  • the mast core forms an essential part of the mast element, wherein further functional components are arranged on the mast core for forming the mast element.
  • the mast core basically extends over almost the entire length of the mast element and provides significantly for the buckling and torsional rigidity of the mast element.
  • further functional components for example for connecting further mast elements or the feed system, which actuating cylinder, winches, gears, motors, roller chains or toothed racks can have, can be provided on the mast element.
  • An advantageous embodiment according to the invention is that a connecting flange is arranged on at least one end of the mast core.
  • the connecting flange is designed in particular for connection to an adjacent mast element.
  • the connecting flange and the further functional components can also be made of a fiber composite material.
  • the at least one connecting flange and / or the longitudinal guide are made of a metal material.
  • a metal material in particular steel or special Gleitbronzen for the guide rails are preferably used.
  • the mast core belt elements, in particular made of a fiber composite material, are attached.
  • the strap elements comprise at least a part of the outer circumference of the mast core and are preferably arranged at regular intervals from one another along the mast core.
  • the belt elements may preferably have a U-shaped or annular closed shape. In principle, these can be made of metal, but the use of fiber composite material according to the invention is also advantageous for weight saving.
  • holding plates for fastening the longitudinal guide are arranged in the region of the belt elements.
  • the retaining plates can also be made of the fiber composite material or a metal material.
  • other functional components be attached to these holding plates.
  • the holding plates are in particular firmly connected to the belt elements, in particular glued and / or screwed. In this way, the holding forces for fastening the additional functional component are introduced over a larger circumferential area in the tubular core of the mast.
  • the longitudinal guide has at least one guide rail.
  • two or more guide rails for guiding a carriage along the mast can be provided.
  • a conventional slide guide is achieved so that conventional drilling carriage or Spülkopfwagen can be performed along the mast element.
  • the invention further relates to a mast for a drill, which is constructed from at least two mast elements, wherein at least one mast element is formed according to the above-described invention.
  • all mast elements of the mast can be formed with the mast core according to the invention from the fiber composite material.
  • the upper, remote from the wellbore mast elements are formed in accordance with the invention, thereby counteracting the risk of tipping.
  • the invention comprises a drilling rig with a carrier vehicle and a mast attached thereto, along which a drill drive for rotating driving and axial displacement of a drill string is mounted at least along a partial section, wherein the above-described mast is provided.
  • the mast elements can be constructed the same. According to the different function, however, differently shaped mast elements can be provided for the construction of the mast.
  • a first lower mast element is connected to the carrier vehicle, wherein along the first lower mast element of the drill drive is slidably mounted along a first longitudinal guide, and that a second upper mast element is provided which a second longitudinal guide for guiding a rinsing head having.
  • a flushing head serves to connect a supply hose to the upper end of the hollow rotating drill pipe for supplying concrete suspension or a rinsing liquid.
  • the first longitudinal guide and the second longitudinal guide may be identical. However, it is also possible that the two longitudinal guides have a different shape, since in particular the longitudinal guide for the drill drive has to absorb larger forces on the drilling carriage.
  • a further advantageous embodiment of the invention consists in that at least one middle mast element is arranged between the first lower mast element and the second upper mast element. In this way, relatively large mast heights can be achieved with a variety of mast elements.
  • a mast member 30 of the present invention includes an elongated box-shaped mast core 32.
  • the mast core 32 is formed as a tubular body having an interior cavity.
  • the wall thickness of the tubular mast core 32 is preferably between 4 mm and a few cm, depending on the length and the cross-sectional profile.
  • the mast core 32 extends substantially over the entire length of the mast element 30 and forms its main part. At its two ends are plate-shaped Connecting flanges 38 a and 38 b attached.
  • the plate-shaped connecting flanges 38a, 38b are made of steel, while the mast core 32 is constructed of a fiber composite material. In this case, in particular a carbon fiber reinforced plastic is used, which in a known manner has a laminate or honeycomb structure.
  • the connecting flanges 38a, 38b serve to connect further mast elements 30 to form a mast for a drilling rig.
  • a longitudinal guide 34 is formed on one side of the tubular mast core 32, which has a rectangular cross-sectional profile.
  • the longitudinal guide 34 comprises two mutually parallel guide rails 36a, 36b, which are made of metal and attached to the mast core 32.
  • band-shaped belt elements 40 are arranged at uniform intervals on the outer circumference of the mast core 32.
  • the strap members 40 extend at least a portion of the outer circumference of the mast core 32 to further increase its rigidity.
  • the belt members 40 are made in the illustrated embodiment U-shaped from the same fiber composite material as the mast core 32 and firmly connected to this.
  • metallic holding plates 42 are arranged, with which the laterally projecting guide rails 36a, 36b are fixedly attached to the mast core 32 by means of screw connections.
  • a flushing head 18 is mounted linearly displaceable.
  • the flushing head 18 is formed at its lower, longitudinal end for fixed connection to the rotating, not shown drill string.
  • the connection for a hose connection is provided for forming a fluid connection to the tubular drill pipe.
  • the flushing head 18 is attached to a Spülkopfwagen 22 which is guided linearly via guide rollers 26 along the longitudinal guide 34.
  • a hose holder 24 for a total of three hoses is provided on a holding arm in order to guide fluid hoses to the rinsing head 18.
  • a drill pipe support 50 is provided with a support plate 52, which serves for Ausknickêt for the drill string.
  • the support plate 52 is mounted on a support carriage 54, which is also guided by means of guide rollers 56 along the longitudinal guide 34 linearly displaceable.
  • the support carriage 54 is connected via two connecting rods 58 fixed to a spaced connection carriage 60, which is also slidably guided along the longitudinal guide 34 via guide rollers 62.
  • At the connecting rods 58 of the Spülkopfwagen 22 is slidably mounted approximately in the middle between the support carriage 54 and the connecting carriage 60.
  • a trained according to the invention drill 10 with a mast 20 is in Fig. 3 shown.
  • the mast 20 is arranged on a basically known adjustment mechanism 28 in a variety of angular positions adjustable on the carrier vehicle 12.
  • the mast 20 is constructed in the present embodiment of a first lower mast element 30a and a second upper mast element 30b.
  • the upper mast element 30b is releasably secured via the plate-shaped flange 38 to a plate-shaped mating flange 39, which is arranged at the upper end of the lower mast element 30a.
  • the lower mast element 30a is formed in a conventional manner from metal and represents the base mast usually arranged on the drill 10. Only the upper mast element 30b is inventively formed with a mast core 32 made of a fiber composite material and represents a mast extension. This allows the drilling a relatively long drill pipe 16 whose length exceeds the length of the lower mast element 30a as a basic mast clearly. It is such an efficient downsetting a relatively deep hole in a drilling without additional assembly operations additional linkage possible. Due to the mast extension according to the invention by the upper mast element 30b in the lightweight construction according to the invention, only a relatively small center of gravity displacement of the drill 10 is achieved despite more than doubling the original mast length.
  • a second longitudinal guide 34b is formed. This serves to guide the Spülkopfwagens 22 with the flushing head 18, which is connected to the upper end of the drill pipe 16.
  • a first longitudinal guide 34a along which a drilling carriage 15 is mounted axially movable with a drill drive 14.
  • the first longitudinal guide 34a and the second longitudinal guide 34b are formed the same, so that about the Spülkopfwagen 22 can be pushed onto the lower mast element 34a.
  • the drill drive 14 has in a known manner to a hollow shaft through which the drill string 16 slidably protrudes and can be driven in rotation.
  • the illustrated drill 10 is preferably provided for drilling a single drill pipe 16, it is of course also possible to drill the drill pipe 16 with a plurality of drill string elements.
  • FIG. 4 another drill 10 is shown, which of the drill 10 in Fig. 3 modified.
  • the modification relates only to the mast 20, so that with regard to the description of the other parts of the drill 10 to the comments on Fig. 3 is referenced.
  • Fig. 4 is the mast 20 from a lower borehole side mast element 30a, which accordingly Fig. 3 is formed, and an upper mast member 30 b constructed between which in addition a third middle mast member 30 c is arranged.
  • the middle mast member 30c is formed in a conventional lightweight construction with a lattice strut structure. Only the upper mast element 30b is made with a mast core 32 according to the invention with a tubular body made of a fiber composite material. As in the aforementioned embodiment according to Fig. 3 for example, the rinse head carriage 22 can be moved from the upper mast element 30b via the middle mast element 30c to the lower mast element 30a. For this purpose, the same longitudinal guides are formed on all mast elements.

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

Abstract

The tower comprises two tower elements (30), in which one of the tower elements has a tower core (32) and a longitudinal guide (34), which is arranged for guiding a carriage along the tower element at the tower core. The tower core comprises a tubular body, which is made a fiber composite material, particularly carbon fiber reinforced plastic. The other tower element is made of metal material and comprises another longitudinal guide. The tubular body comprises a circular ring shaped or rectangular cross-sectional profile. An independent claim is included for a drilling tool comprises a carrier vehicle.

Description

Die Erfindung betrifft ein Mastelement für ein Bohrgerät mit einem Mastkern und mindestens einer Längsführung, welche zum Führen eines Schlittens entlang des Mastelementes an dem Mastkern angeordnet ist, gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a mast element for a drill with a mast core and at least one longitudinal guide, which is arranged for guiding a carriage along the mast element to the mast core, according to the preamble of patent claim 1.

Bohrgeräte mit derartigen Mastelementen werden beispielsweise auf dem Gebiet des Spezialtiefbaus eingesetzt. Der Mast eines solchen Bohrgerätes kann aus einem oder mehreren Mastelementen aufgebaut sein. Entlang des Mastes ist das Bohrgestänge angeordnet, welches mittels eines Bohrantriebs drehend angetrieben und längs des Mastes verschoben wird. Die Länge des Mastes stellt dabei eine Begrenzung für die Länge des Bohrgestänges dar.Drilling devices with such mast elements are used for example in the field of special civil engineering. The mast of such a drill may be constructed from one or more mast elements. Along the mast, the drill string is arranged, which is rotationally driven by means of a drill drive and moved along the mast. The length of the mast is a limitation on the length of the drill pipe.

Zum Erreichen größerer Bohrtiefen ist es zum einen bekannt, das Bohrgestänge aus mehreren Bohrgestängeelementen aufzubauen. Die einzelnen Bohrgestängeelemente entsprechen dabei etwa der Länge des Mastes. Mit diesem Bohrverfahren können zwar sehr tiefe Bohrlöcher erstellt werden. Allerdings ist der Montageaufwand für den Einbau eines weiteren Bohrgestängeelementes zeit- und arbeitsintensiv.To achieve larger drilling depths, it is firstly known to build the drill string from a plurality of drill string elements. The individual drill string elements correspond approximately to the length of the mast. Although very deep holes can be made with this drilling method. However, the installation effort for the installation of another drill pipe element is time consuming and labor intensive.

Weiterhin ist es bekannt, den Mast eines Bohrgerätes durch Anbau einer sogenannten Mastverlängerung nach oben zu verlängern. Es können dann entsprechend längere Bohrgestänge eingesetzt werden. Allerdings verlagert sich der Schwerpunkt mit dem Anbau einer Mastverlängerung des gesamten Bohrgerätes nach oben. Mit dieser Schwerpunktsverlagerung steigt die Kippgefahr, so dass dem Anbau von Mastverlängerungen Grenzen gesetzt sind.Furthermore, it is known to extend the mast of a drill by cultivating a so-called mast extension upwards. It can then be used correspondingly longer drill pipe. However, the focus shifted to the cultivation of a mast extension of the entire drill up. With this shift of emphasis, the risk of tipping increases, so that there are limits to the cultivation of mast extensions.

Der Erfindung liegt die Aufgabe zugrunde, ein Mastelement für ein Bohrgerät anzugeben, mit welchen in effizienter und sicherer Weise auch größere Bohrtiefen erreicht werden können.The invention has for its object to provide a mast element for a drill, with which also larger drilling depths can be achieved in an efficient and safe manner.

Die Aufgabe wird durch ein Mastelement für ein Bohrgerät mit den Merkmalen des Anspruchs 1 gelöst. Bevorzugte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen angegeben.The object is achieved by a mast element for a drilling rig having the features of claim 1. Preferred embodiments of the invention are indicated in the dependent claims.

Das erfindungsgemäße Mastelement ist dadurch gekennzeichnet, dass der Mastkern einen Rohrkörper aufweist, welcher aus einem Faserverbundwerkstoff gebildet ist.The mast element according to the invention is characterized in that the mast core has a tubular body, which is formed from a fiber composite material.

Ein Grundgedanke der Erfindung besteht darin, das Gewicht eines Mastelementes zu reduzieren, indem von der bisherigen Metallbauweise abgegangen wird. Dies wird nach der Erfindung dadurch erreicht, dass der Mastkern als ein Rohrkörper aus einem Faserverbundwerkstoff gebildet wird. Gegenüber herkömmlichen Mastelementen, selbst wenn diese in Gitterstruktur aufgebaut sind, können so Gewichtseinsparungen von bis zu 40% und mehr erzielt werden. Durch einen derartigen leichten Mastaufbau bleibt auch bei größeren Masthöhen der Schwerpunkt des gesamten Bohrgerätes relativ nahe am Boden, so dass die Kippgefahr erheblich vermindert ist.A basic idea of the invention is to reduce the weight of a mast element by departing from the previous metal construction. This is achieved according to the invention in that the mast core is formed as a tubular body of a fiber composite material. Compared to conventional mast elements, even if these are constructed in lattice structure, weight savings of up to 40% and more can be achieved. By such a lightweight mast structure, the center of gravity of the entire drill remains relatively close to the ground, even with larger mast heights, so that the risk of tipping is significantly reduced.

Grundsätzlich kann der Rohrkörper eine beliebige Querschnittsform aufweisen, etwa eine ovale oder polygonale Form. Eine besonders gute Stabilität wird erfindungsgemäß dadurch erreicht, dass der Rohrkörper ein kreisförmiges oder rechteckiges Querschnittsprofil aufweist. Mit einem derartigen ringförmig geschlossenen Querschnittsprofil wird eine hohe Knicksteifigkeit bei einem geringen Gewicht erreicht.In principle, the tubular body may have any cross-sectional shape, such as an oval or polygonal shape. A particularly good stability is inventively achieved in that the tubular body has a circular or rectangular cross-sectional profile. With such an annular closed cross-sectional profile a high buckling stiffness is achieved with a low weight.

Grundsätzlich können verschiedenste Faserverbundwerkstoffe zur Herstellung des Mastkernes vorgesehen sein. Beispielsweise sind Glasfasern oder verschiedene Kunststofffasern möglich. Die Faserverbundwerkstoffe können mit bekannter Laminat- oder Wabenstruktur alleine oder in Kombination mit anderen Faserverbundwerkstoffen oder auch anderen Keramik- oder Metallwerkstoffen eingesetzt werden.In principle, a wide variety of fiber composite materials can be provided for producing the mast core. For example, glass fibers or various plastic fibers are possible. The fiber composites can be used with known laminate or honeycomb structure alone or in combination with other fiber composites or other ceramic or metal materials.

Besonders bevorzugt ist es nach der Erfindung, dass als Faserverbundwerkstoff ein kohlenstofffaserverstärkter Kunststoff, auch CFK genannt, vorgesehen ist. Dieser Werkstoff bietet ein sehr gutes Verhältnis zwischen Stabilität und Gewicht.It is particularly preferred according to the invention that a carbon fiber reinforced plastic, also called CFRP, is provided as the fiber composite material. This material offers a very good balance between stability and weight.

Der Mastkern bildet einen wesentlichen Teil des Mastelementes, wobei weitere Funktionskomponenten an dem Mastkern zum Bilden des Mastelementes angeordnet sind. Der Mastkern erstreckt sich grundsätzlich über die nahezu gesamte Länge des Mastelementes und sorgt maßgeblich für die Knick- und Torsionssteifigkeit des Mastelementes. An dem Mastelement können neben der Längsführung weitere Funktionskomponenten, etwa zum Anschluss weiterer Mastelemente oder das Vorschubsystem, welches Stellzylinder, Winden, Getriebe, Motore, Rollenketten oder Zahnstangen aufweisen kann, vorgesehen sein.The mast core forms an essential part of the mast element, wherein further functional components are arranged on the mast core for forming the mast element. The mast core basically extends over almost the entire length of the mast element and provides significantly for the buckling and torsional rigidity of the mast element. In addition to the longitudinal guide, further functional components, for example for connecting further mast elements or the feed system, which actuating cylinder, winches, gears, motors, roller chains or toothed racks can have, can be provided on the mast element.

Eine vorteilhafte Ausführungsform besteht nach der Erfindung darin, dass an zumindest einem Ende des Mastkernes ein Verbindungsflansch angeordnet ist. Der Verbindungsflansch ist insbesondere zum Verbinden mit einem angrenzenden Mastelement ausgebildet.An advantageous embodiment according to the invention is that a connecting flange is arranged on at least one end of the mast core. The connecting flange is designed in particular for connection to an adjacent mast element.

Grundsätzlich können der Verbindungsflansch und die weiteren Funktionskomponenten ebenfalls aus einem Faserverbundwerkstoff gefertigt sein. Hinsichtlich des Verschleißverhaltens ist es nach der Erfindung vorteilhaft, dass der mindestens eine Verbindungsflansch und/oder die Längsführung aus einem Metallwerkstoff gefertigt sind. Als Metallwerkstoff sind insbesondere Stahl oder für die Führungsschienen spezielle Gleitbronzen bevorzugt einsetzbar.In principle, the connecting flange and the further functional components can also be made of a fiber composite material. With regard to the wear behavior, it is advantageous according to the invention that the at least one connecting flange and / or the longitudinal guide are made of a metal material. As a metal material, in particular steel or special Gleitbronzen for the guide rails are preferably used.

Zur Erhöhung der Steifigkeit des Mastkernes ist es nach der Erfindung vorgesehen, dass entlang des Mastkernes Gurtelemente, insbesondere aus einem Faserverbundwerkstoff, angebracht sind. Die Gurtelemente umfassen zumindest einen Teil des Außenumfanges des Mastkernes und sind bevorzugt in gleichmäßigen Abständen zueinander entlang des Mastkernes angeordnet. Hierdurch werden die Knicksteifigkeit sowie die Druckfestigkeit des rohrförmigen, länglichen Mastkernes erhöht. Die Gurtelemente können vorzugsweise eine U-förmige oder ringförmig geschlossene Gestalt aufweisen. Grundsätzlich können diese aus Metall sein, wobei jedoch zur Gewichtseinsparung ebenfalls die Verwendung von Faserverbundwerkstoff erfindungsgemäß vorteilhaft ist.To increase the rigidity of the mast core, it is provided according to the invention that along the mast core belt elements, in particular made of a fiber composite material, are attached. The strap elements comprise at least a part of the outer circumference of the mast core and are preferably arranged at regular intervals from one another along the mast core. As a result, the buckling resistance and the compressive strength of the tubular, elongated mast core are increased. The belt elements may preferably have a U-shaped or annular closed shape. In principle, these can be made of metal, but the use of fiber composite material according to the invention is also advantageous for weight saving.

Nach der Erfindung besteht eine bevorzugte Weiterbildung darin, dass im Bereich der Gurtelemente Halteplatten zur Befestigung der Längsführung angeordnet sind. Die Halteplatten können dabei ebenfalls aus dem Faserverbundwerkstoff oder einem Metallwerkstoff gefertigt sein. Neben der Längsführung können auch weitere Funktionskomponenten an diesen Halteplatten angebracht werden. Die Halteplatten sind dabei insbesondere mit den Gurtelementen fest verbunden, insbesondere verklebt und/oder verschraubt. Auf diese Weise werden die Haltekräfte zum Befestigen der zusätzlichen Funktionskomponente über einen größeren Umfangsbereich in den rohrförmigen Mastkern eingeleitet.According to the invention, a preferred development is that holding plates for fastening the longitudinal guide are arranged in the region of the belt elements. The retaining plates can also be made of the fiber composite material or a metal material. In addition to the longitudinal guide can also other functional components be attached to these holding plates. The holding plates are in particular firmly connected to the belt elements, in particular glued and / or screwed. In this way, the holding forces for fastening the additional functional component are introduced over a larger circumferential area in the tubular core of the mast.

Weiterhin ist es nach der Erfindung bevorzugt, dass die Längsführung mindestens eine Führungsschiene aufweist. Bevorzugt können auch zwei oder mehrere Führungsschienen zum Führen eines Schlittens entlang des Mastes vorgesehen sein. Auf diese Weise wird eine herkömmliche Schlittenführung erreicht, so dass herkömmliche Bohrschlitten oder Spülkopfwagen entlang des Mastelementes geführt werden können.Furthermore, it is preferred according to the invention that the longitudinal guide has at least one guide rail. Preferably, two or more guide rails for guiding a carriage along the mast can be provided. In this way, a conventional slide guide is achieved so that conventional drilling carriage or Spülkopfwagen can be performed along the mast element.

Die Erfindung betrifft weiterhin einen Mast für ein Bohrgerät, welcher aus mindestens zwei Mastelementen aufgebaut ist, wobei zumindest ein Mastelement gemäß der vorbeschriebenen Erfindung ausgebildet ist. Grundsätzlich können alle Mastelemente des Mastes mit dem erfindungsgemäßen Mastkern aus dem Faserverbundwerkstoff gebildet sein. Es ist jedoch auch möglich und bevorzugt, lediglich einen oder nur einen Teil der Mastelemente in der erfindungsgemäßen Leichtbauweise auszubilden, während zumindest ein anderes Mastelement in herkömmlicher Weise aus einem Metallwerkstoff gebildet ist. In vorteilhafter Weise sind insbesondere die oberen, vom Bohrloch abgewandten Mastelemente in erfindungsgemäßer Weise ausgebildet, um hierdurch der Kippgefahr entgegenzuwirken.The invention further relates to a mast for a drill, which is constructed from at least two mast elements, wherein at least one mast element is formed according to the above-described invention. In principle, all mast elements of the mast can be formed with the mast core according to the invention from the fiber composite material. However, it is also possible and preferred to form only one or only a part of the mast elements in the lightweight construction according to the invention, while at least one other mast element is formed in a conventional manner from a metal material. In an advantageous manner, in particular the upper, remote from the wellbore mast elements are formed in accordance with the invention, thereby counteracting the risk of tipping.

Weiterhin umfasst die Erfindung ein Bohrgerät mit einem Trägerfahrzeug und einem daran angebrachten Mast, entlang welchem zumindest entlang eines Teilabschnittes ein Bohrantrieb zum drehenden Antreiben und axialem Verschieben eines Bohrgestänges gelagert ist, wobei der vorbeschriebene Mast vorgesehen ist.Furthermore, the invention comprises a drilling rig with a carrier vehicle and a mast attached thereto, along which a drill drive for rotating driving and axial displacement of a drill string is mounted at least along a partial section, wherein the above-described mast is provided.

Grundsätzlich können die Mastelemente gleich aufgebaut sein. Entsprechend der unterschiedlichen Funktion können jedoch unterschiedlich ausgebildete Mastelemente zum Aufbau des Mastes vorgesehen werden. So ist es nach der Erfindung bevorzugt, dass ein erstes unteres Mastelement mit dem Trägerfahrzeug verbunden ist, wobei entlang des ersten unteren Mastelementes der Bohrantrieb entlang einer ersten Längsführung verschiebbar gelagert ist, und dass ein zweites oberes Mastelement vorgesehen ist, welches eine zweite Längsführung zum Führen eines Spülkopfes aufweist. Ein Spülkopf dient dabei zur Verbindung eines Zuführschlauches an das obere Ende des hohlen drehenden Bohrgestänges zur Zuführung von Betonsuspension oder einer Spülflüssigkeit. Grundsätzlich können die erste Längsführung und die zweite Längsführung gleich ausgebildet sein. Es ist jedoch auch möglich, dass die beiden Längsführungen eine unterschiedliche Form aufweisen, da insbesondere die Längsführung für den Bohrantrieb an dem Bohrschlitten größere Kräfte aufzunehmen hat.In principle, the mast elements can be constructed the same. According to the different function, however, differently shaped mast elements can be provided for the construction of the mast. Thus, it is preferred according to the invention that a first lower mast element is connected to the carrier vehicle, wherein along the first lower mast element of the drill drive is slidably mounted along a first longitudinal guide, and that a second upper mast element is provided which a second longitudinal guide for guiding a rinsing head having. A flushing head serves to connect a supply hose to the upper end of the hollow rotating drill pipe for supplying concrete suspension or a rinsing liquid. In principle, the first longitudinal guide and the second longitudinal guide may be identical. However, it is also possible that the two longitudinal guides have a different shape, since in particular the longitudinal guide for the drill drive has to absorb larger forces on the drilling carriage.

Eine weitere vorteilhafte Ausgestaltung der Erfindung besteht darin, dass zwischen dem ersten unteren Mastelement und dem zweiten oberen Mastelement mindestens ein mittleres Mastelement angeordnet ist. Auf diese Weise können relativ große Masthöhen mit einer Vielzahl von Mastelementen erzielt werden.A further advantageous embodiment of the invention consists in that at least one middle mast element is arranged between the first lower mast element and the second upper mast element. In this way, relatively large mast heights can be achieved with a variety of mast elements.

Die Erfindung wird nachfolgend anhand von bevorzugten Ausführungsbeispielen weiter erläutert, welche schematisch in den Zeichnungen dargestellt sind. In den Zeichnungen zeigen:

Fig. 1
eine perspektivische Ansicht eines erfindungsgemäßen Mast-elementes;
Fig. 2
eine perspektivische Ansicht eines weiteren erfindungsgemä-ßen Mastelementes mit angeordneten Funktionskomponenten;
Fig. 3
eine Seitenansicht eines erfindungsgemäßen Bohrgerätes mit Mast aus zwei Mastelementen; und
Fig. 4
eine Seitenansicht eines weiteren erfindungsgemäßen Bohrge-rätes mit einem Mast aus drei Mastelementen.
The invention will be further elucidated on the basis of preferred exemplary embodiments, which are illustrated schematically in the drawings. In the drawings show:
Fig. 1
a perspective view of a mast element according to the invention;
Fig. 2
a perspective view of another inventive mast element with arranged functional components;
Fig. 3
a side view of a drilling device according to the invention with mast of two mast elements; and
Fig. 4
a side view of another Bohrge appliance according to the invention with a mast of three mast elements.

Gemäß Fig. 1 umfasst ein erfindungsgemäßes Mastelement 30 einen länglichen, kastenförmigen Mastkern 32. Der Mastkern 32 ist als ein Rohrkörper mit einem inneren Hohlraum ausgebildet. Die Wanddicke des rohrförmigen Mastkernes 32 beträgt abhängig von der Länge und dem Querschnittsprofil vorzugsweise zwischen 4 mm und einigen cm.According to Fig. 1 For example, a mast member 30 of the present invention includes an elongated box-shaped mast core 32. The mast core 32 is formed as a tubular body having an interior cavity. The wall thickness of the tubular mast core 32 is preferably between 4 mm and a few cm, depending on the length and the cross-sectional profile.

Der Mastkern 32 erstreckt sich im Wesentlichen über die gesamte Länge des Mastelementes 30 und bildet dessen Hauptteil. An seinen beiden Enden sind plattenförmige Verbindungsflansche 38a und 38b befestigt. Die plattenförmigen Verbindungsflansche 38a, 38b sind aus Stahl gefertigt, während der Mastkern 32 aus einem Faserverbundwerkstoff aufgebaut ist. Dabei ist insbesondere ein kohlenstofffaserverstärkter Kunststoff eingesetzt, welcher in bekannter Weise eine Laminat- oder Wabenstruktur aufweist. Die Verbindungsflansche 38a, 38b dienen zum Anschluss weiterer Mastelemente 30 zum Bilden eines Mastes für ein Bohrgerät.The mast core 32 extends substantially over the entire length of the mast element 30 and forms its main part. At its two ends are plate-shaped Connecting flanges 38 a and 38 b attached. The plate-shaped connecting flanges 38a, 38b are made of steel, while the mast core 32 is constructed of a fiber composite material. In this case, in particular a carbon fiber reinforced plastic is used, which in a known manner has a laminate or honeycomb structure. The connecting flanges 38a, 38b serve to connect further mast elements 30 to form a mast for a drilling rig.

Abhängig von dem konkreten Einsatzzweck des Mastelementes 30 sind an dem Mastkern 32 weitere Funktionskomponenten angeordnet. Insbesondere ist an einer Seite des rohrförmigen Mastkernes 32, welcher ein rechteckiges Querschnittsprofil aufweist, eine Längsführung 34 ausgebildet. Die Längsführung 34 umfasst zwei parallel zueinander angeordnete Führungsschienen 36a, 36b, welche aus Metall gefertigt und an dem Mastkern 32 angebracht sind.Depending on the specific application of the mast element 30 32 further functional components are arranged on the mast core. In particular, a longitudinal guide 34 is formed on one side of the tubular mast core 32, which has a rectangular cross-sectional profile. The longitudinal guide 34 comprises two mutually parallel guide rails 36a, 36b, which are made of metal and attached to the mast core 32.

Entlang des Mastkernes 32 sind in gleichmäßigen Abständen bandförmige Gurtelemente 40 am Außenumfang des Mastkernes 32 angeordnet. Die Gurtelemente 40 erstrecken sich zumindest um einen Teilbereich des Außenumfangs des Mastkernes 32, um dessen Steifigkeit weiter zu erhöhen. Die Gurtelemente 40 sind im dargestellten Ausführungsbeispiel U-förmig aus demselben Faserverbundwerkstoff wie der Mastkern 32 gefertigt und fest mit diesem verbunden. Im Bereich der bandförmigen Gurtelemente 40 sind metallische Halteplatten 42 angeordnet, mit welchen die seitlich vorstehenden Führungsschienen 36a, 36b mittels Schraubverbindungen fest an dem Mastkern 32 angebracht sind.Along the mast core 32 band-shaped belt elements 40 are arranged at uniform intervals on the outer circumference of the mast core 32. The strap members 40 extend at least a portion of the outer circumference of the mast core 32 to further increase its rigidity. The belt members 40 are made in the illustrated embodiment U-shaped from the same fiber composite material as the mast core 32 and firmly connected to this. In the region of the band-shaped belt elements 40 metallic holding plates 42 are arranged, with which the laterally projecting guide rails 36a, 36b are fixedly attached to the mast core 32 by means of screw connections.

In Fig. 2 ist das Mastelement 30 von Fig. 1 mit zusätzlichen Funktionskomponenten versehen. An der Längsführung 34 am Mastkern 32 ist ein Spülkopf 18 linear verschiebbar gelagert. Der Spülkopf 18 ist an seinem unteren, längsseitigen Ende zur festen Verbindung mit dem drehenden, nicht dargestellten Bohrgestänge, ausgebildet. An seinem abgewandten oberen, rechtsseitigen Ende ist der Anschluss für eine Schlauchverbindung zum Bilden einer Fluidverbindung zum rohrförmigen Bohrgestänge vorgesehen. Der Spülkopf 18 ist an einem Spülkopfwagen 22 befestigt, welcher über Führungsrollen 26 entlang der Längsführung 34 linear geführt ist. An dem Spülkopfwagen 22 ist an einem Haltearm ein Schlauchhalter 24 für insgesamt drei Schläuche vorgesehen, um Fluidschläuche zum Spülkopf 18 zu führen.In Fig. 2 is the mast element 30 of Fig. 1 provided with additional functional components. On the longitudinal guide 34 on the mast core 32, a flushing head 18 is mounted linearly displaceable. The flushing head 18 is formed at its lower, longitudinal end for fixed connection to the rotating, not shown drill string. At its opposite upper, right-hand end, the connection for a hose connection is provided for forming a fluid connection to the tubular drill pipe. The flushing head 18 is attached to a Spülkopfwagen 22 which is guided linearly via guide rollers 26 along the longitudinal guide 34. On the rinsing head carriage 22, a hose holder 24 for a total of three hoses is provided on a holding arm in order to guide fluid hoses to the rinsing head 18.

Weiterhin ist eine Bohrgestängeabstützung 50 mit einer Stützplatte 52 vorgesehen, welche zur Ausknicksicherung für das Bohrgestänge dient. Die Stützplatte 52 ist an einem Stützwagen 54 gelagert, welcher ebenfalls mittels Führungsrollen 56 entlang der Längsführung 34 linear verschiebbar geführt ist.Furthermore, a drill pipe support 50 is provided with a support plate 52, which serves for Ausknicksicherung for the drill string. The support plate 52 is mounted on a support carriage 54, which is also guided by means of guide rollers 56 along the longitudinal guide 34 linearly displaceable.

Der Stützwagen 54 ist über zwei Verbindungsstangen 58 fest mit einem beabstandeten Verbindungswagen 60 verbunden, welcher ebenfalls entlang der Längsführung 34 über Führungsrollen 62 verschiebbar geführt ist. An den Verbindungsstangen 58 ist der Spülkopfwagen 22 etwa in der Mitte zwischen dem Stützwagen 54 und dem Verbindungswagen 60 verschiebbar gelagert.The support carriage 54 is connected via two connecting rods 58 fixed to a spaced connection carriage 60, which is also slidably guided along the longitudinal guide 34 via guide rollers 62. At the connecting rods 58 of the Spülkopfwagen 22 is slidably mounted approximately in the middle between the support carriage 54 and the connecting carriage 60.

Ein nach der Erfindung ausgebildetes Bohrgerät 10 mit einem Mast 20 ist in Fig. 3 dargestellt. Der Mast 20 ist über eine grundsätzlich bekannte Verstellmechanik 28 in vielfältigen Winkellagen verstellbar an dem Trägerfahrzeug 12 angeordnet.A trained according to the invention drill 10 with a mast 20 is in Fig. 3 shown. The mast 20 is arranged on a basically known adjustment mechanism 28 in a variety of angular positions adjustable on the carrier vehicle 12.

Der Mast 20 ist im vorliegenden Ausführungsbeispiel aus einem ersten unteren Mastelement 30a und einem zweiten oberen Mastelement 30b aufgebaut. Hierzu ist das obere Mastelement 30b über den plattenförmigen Flansch 38 an einem plattenförmigen Gegenflansch 39 lösbar befestigt, welcher am oberen Ende des unteren Mastelementes 30a angeordnet ist.The mast 20 is constructed in the present embodiment of a first lower mast element 30a and a second upper mast element 30b. For this purpose, the upper mast element 30b is releasably secured via the plate-shaped flange 38 to a plate-shaped mating flange 39, which is arranged at the upper end of the lower mast element 30a.

Im vorliegenden Ausführungsbeispiel ist das untere Mastelement 30a in herkömmlicher Weise aus Metall ausgebildet und stellt den am Bohrgerät 10 üblicherweise angeordneten Grundmast dar. Lediglich das obere Mastelement 30b ist erfindungsgemäß mit einem Mastkern 32 aus einem Faserverbundwerkstoff gebildet und stellt eine Mastverlängerung dar. Dies ermöglicht das Abbohren eines relativ langen Bohrgestänges 16, dessen Länge die Länge des unteren Mastelementes 30a als Grundmast deutlich überschreitet. Es ist so ein effizientes Niederbringen einer relativ tiefen Bohrung in einem Bohrvorgang ohne zusätzliche Montagevorgänge zusätzlicher Gestänge möglich. Durch die erfindungsgemäße Mastverlängerung durch das obere Mastelement 30b in der erfindungsgemäßen Leichtbauweise wird trotz der mehr als Verdoppelung der ursprünglichen Mastlänge nur eine relativ geringe Schwerpunktverlagerung nach oben des Bohrgerätes 10 erreicht.In the present embodiment, the lower mast element 30a is formed in a conventional manner from metal and represents the base mast usually arranged on the drill 10. Only the upper mast element 30b is inventively formed with a mast core 32 made of a fiber composite material and represents a mast extension. This allows the drilling a relatively long drill pipe 16 whose length exceeds the length of the lower mast element 30a as a basic mast clearly. It is such an efficient downsetting a relatively deep hole in a drilling without additional assembly operations additional linkage possible. Due to the mast extension according to the invention by the upper mast element 30b in the lightweight construction according to the invention, only a relatively small center of gravity displacement of the drill 10 is achieved despite more than doubling the original mast length.

An einer Vorderseite des oberen Mastelementes 30b ist eine zweite Längsführung 34b ausgebildet. Diese dient zur Führung des Spülkopfwagens 22 mit dem Spülkopf 18, welcher am oberen Ende des Bohrgestänges 16 angeschlossen ist. An der Vorderseite des unteren Mastelements 30a befindet sich eine erste Längsführung 34a, entlang welcher ein Bohrschlitten 15 mit einem Bohrantrieb 14 axial verfahrbar gelagert ist. Bevorzugterweise sind die erste Längsführung 34a und die zweite Längsführung 34b gleich ausgebildet, so dass etwa der Spülkopfwagen 22 auch auf das untere Mastelement 34a geschoben werden kann. Der Bohrantrieb 14 weist in bekannter Weise eine Hohlwelle auf, durch welche das Bohrgestänge 16 verschiebbar hindurchragt und drehend angetrieben werden kann.At a front side of the upper mast element 30b, a second longitudinal guide 34b is formed. This serves to guide the Spülkopfwagens 22 with the flushing head 18, which is connected to the upper end of the drill pipe 16. At the front of the lower mast element 30a is a first longitudinal guide 34a, along which a drilling carriage 15 is mounted axially movable with a drill drive 14. Preferably, the first longitudinal guide 34a and the second longitudinal guide 34b are formed the same, so that about the Spülkopfwagen 22 can be pushed onto the lower mast element 34a. The drill drive 14 has in a known manner to a hollow shaft through which the drill string 16 slidably protrudes and can be driven in rotation.

Auch wenn das dargestellte Bohrgerät 10 vorzugsweise zum Abbohren eines einzelnen Bohrgestänges 16 vorgesehen ist, ist es selbstverständlich auch möglich, das Bohrgestänge 16 mit mehreren Bohrgestängeelementen abzubohren.Although the illustrated drill 10 is preferably provided for drilling a single drill pipe 16, it is of course also possible to drill the drill pipe 16 with a plurality of drill string elements.

In Fig. 4 ist ein weiteres Bohrgerät 10 dargestellt, welches von dem Bohrgerät 10 in Fig. 3 abgewandelt ist. Die Abwandlung betrifft lediglich den Mast 20, so dass hinsichtlich der Beschreibung der weiteren Teile des Bohrgerätes 10 auf die Ausführungen zur Fig. 3 verwiesen wird.In Fig. 4 another drill 10 is shown, which of the drill 10 in Fig. 3 modified. The modification relates only to the mast 20, so that with regard to the description of the other parts of the drill 10 to the comments on Fig. 3 is referenced.

In dem Ausführungsbeispiel nach Fig. 4 ist der Mast 20 aus einem unteren bohrlochseitigen Mastelement 30a, welches entsprechend Fig. 3 ausgebildet ist, und einem oberen Mastelement 30b aufgebaut, zwischen denen zusätzlich ein drittes mittleres Mastelement 30c angeordnet ist.In the embodiment according to Fig. 4 is the mast 20 from a lower borehole side mast element 30a, which accordingly Fig. 3 is formed, and an upper mast member 30 b constructed between which in addition a third middle mast member 30 c is arranged.

Das mittlere Mastelement 30c ist in einer herkömmlichen Leichtbauweise mit einer Gitterstrebenstruktur ausgebildet. Lediglich das obere Mastelement 30b ist mit einem erfindungsgemäßen Mastkern 32 mit einem Rohrkörper aus einem Faserverbundwerkstoff gefertigt. Wie bei dem vorgenannten Ausführungsbeispiel gemäß Fig. 3 kann der Spülkopfwagen 22 von dem oberen Mastelement 30b über das mittlere Mastelement 30c bis zu dem unteren Mastelement 30a gefahren werden. Hierzu sind an allen Mastelementen gleiche Längsführungen ausgebildet.The middle mast member 30c is formed in a conventional lightweight construction with a lattice strut structure. Only the upper mast element 30b is made with a mast core 32 according to the invention with a tubular body made of a fiber composite material. As in the aforementioned embodiment according to Fig. 3 For example, the rinse head carriage 22 can be moved from the upper mast element 30b via the middle mast element 30c to the lower mast element 30a. For this purpose, the same longitudinal guides are formed on all mast elements.

Claims (12)

Mastelement für ein Bohrgerät (10) mit - einem Mastkern (32) und - mindestens einer Längsführung (34), welche zum Führen eines Schlittens entlang des Mastelementes (30) an dem Mastkern (32) angeordnet ist, dadurch gekennzeichnet, - dass der Mastkern (32) einen Rohrkörper aufweist, welcher aus einem Faserverbundwerkstoff gebildet ist. Mast element for a drill (10) with - a mast core (32) and - At least one longitudinal guide (34) which is arranged for guiding a carriage along the mast element (30) on the mast core (32), characterized, - That the mast core (32) has a tubular body which is formed of a fiber composite material. Mastelement nach Anspruch 1,
dadurch gekennzeichnet,
dass der Rohrkörper ein kreisringförmiges oder rechteckiges Querschnittsprofil aufweist.Mast element according to claim 1,
characterized,
that the tubular body has an annular or rectangular cross-sectional profile. Mastelement nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass als Faserverbundwerkstoff ein kohlenstofffaserverstärkter Kunststoff (CFK) vorgesehen ist.Mast element according to claim 1 or 2,
characterized,
that a carbon fiber reinforced plastic (CFRP) is provided as a fiber composite material. Mastelement nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
dass an zumindest einem Ende des Mastkernes (32) ein Verbindungsflansch (38) angeordnet ist.Mast element according to one of claims 1 to 3,
characterized,
that a connecting flange (38) is arranged at at least one end of the pole core (32). Mastelement nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
dass der mindestens eine Verbindungsflansch (38) und/oder die Längsführung (34) aus einem Metallwerkstoff gefertigt sind.Mast element according to one of claims 1 to 4,
characterized,
in that the at least one connecting flange (38) and / or the longitudinal guide (34) are made of a metal material. Mastelement nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
dass entlang des Mastkernes (32) Gurtelemente (40), insbesondere aus einem Faserverbundwerkstoff, angebracht sind.Mast element according to one of claims 1 to 5,
characterized,
that along the pole core (32) chord members (40), in particular of a fiber composite material are mounted. Mastelement nach Anspruch 6,
dadurch gekennzeichnet,
dass im Bereich der Gurtelemente (40) Halteplatten (42) zur Befestigung der Längsführung (34) angeordnet sind.Mast element according to claim 6,
characterized,
in that holding plates (42) for fastening the longitudinal guide (34) are arranged in the region of the belt elements (40). Mastelement nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
dass die Längsführung (34) mindestens eine Führungsschiene (36) aufweist.Mast element according to one of claims 1 to 7,
characterized,
that the longitudinal guide (34) has at least one guide rail (36). Mast für ein Bohrgerät (10), welcher aus mindestens zwei Mastelementen (30) aufgebaut ist,
dadurch gekennzeichnet,
dass zumindest ein Mastelement (30) nach einem der Ansprüche 1 bis 8 ausgebildet ist.Mast for a drilling rig (10), which is constructed from at least two mast elements (30),
characterized,
in that at least one mast element (30) according to one of claims 1 to 8 is formed. Bohrgerät mit einem Trägerfahrzeug (12) und einem daran angebrachten Mast (20), entlang welchem zumindest entlang eines Teilabschnittes ein Bohrantrieb (14) zum drehenden Antreiben und axialen Verschieben eines Bohrgestänges (16) gelagert ist,
dadurch gekennzeichnet,
dass ein Mast (20) nach Anspruch 9 vorgesehen ist.Drilling device with a carrier vehicle (12) and a mast (20) attached thereto, along which a drill drive (14) for rotating driving and axial displacement of a drill pipe (16) is mounted along at least one section,
characterized,
that a mast (20) is provided as claimed in claim. 9 Bohrgerät nach Anspruch 10,
dadurch gekennzeichnet,
dass ein erstes unteres Mastelement (30a) mit dem Trägerfahrzeug (12) verbunden ist, wobei entlang des ersten unteren Mastelementes (30a) der Bohrantrieb (14) entlang einer ersten Längsführung (34a) verschiebbar gelagert ist, und
dass ein zweites oberes Mastelement (30b) vorgesehen ist, welches eine zweite Längsführung (34b) zum Führen eines Spülkopfes (18) aufweist.Drilling device according to claim 10,
characterized,
that a first lower mast element (30a) is connected to the carrier vehicle (12), wherein along the first lower mast element (30a) of the drill drive (14) along a first longitudinal guide (34a) is slidably mounted, and
in that a second upper mast element (30b) is provided which has a second longitudinal guide (34b) for guiding a flushing head (18). Bohrgerät nach Anspruch 11,
dadurch gekennzeichnet,
dass zwischen dem ersten unteren Mastelement (30a) und dem zweiten oberen Mastelement (30b) mindestens ein mittleres Mastelement (30c) angeordnet ist.Drilling device according to claim 11,
characterized,
in that at least one middle mast element (30c) is arranged between the first lower mast element (30a) and the second upper mast element (30b).
EP20110003710 2011-05-05 2011-05-05 Mast element for a drill Not-in-force EP2520756B1 (en)

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EP4092195B1 (en) 2021-05-19 2023-07-05 BAUER Maschinen GmbH Mast element, in particular leader element, for construction machine and method for manufacturing the mast element
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