EP0537624A1 - Reaming tool - Google Patents
Reaming tool Download PDFInfo
- Publication number
- EP0537624A1 EP0537624A1 EP92117188A EP92117188A EP0537624A1 EP 0537624 A1 EP0537624 A1 EP 0537624A1 EP 92117188 A EP92117188 A EP 92117188A EP 92117188 A EP92117188 A EP 92117188A EP 0537624 A1 EP0537624 A1 EP 0537624A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- expansion
- carrier axis
- head according
- expanding
- expander head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005553 drilling Methods 0.000 claims abstract description 25
- 239000000725 suspension Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000002689 soil Substances 0.000 description 5
- 239000011435 rock Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- 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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
-
- 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
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Definitions
- the invention relates to an expansion head for drilling systems for the underground laying of lines.
- a system lance is inserted into the ground at an angle of approximately 15 to 30 ° and, after reaching the intended installation depth, driven horizontally up to a previously created assembly pit. After the system lance has reached the assembly pit, the lance is dismantled and the line to be laid is attached to the drill pipe and pulled into the hole in reverse. In this case, however, it may be necessary to expand the bore already created with the aid of an expanding head if the diameter of the lines to be drawn in exceeds the diameter of the system lance.
- Such expanding heads are, for example, from the brochure "What does FlowTex mean for Germany?" known from 1986. They consist of a carrier axis with a first fastening device for the drill pipe and a second fastening device for the material to be drawn in. Bores are provided in the carrier axis through which a drilling suspension is supplied, which facilitates the loosening and removal of the earth material. Furthermore, the known expansion head consists of a basically conical expansion body attached to the carrier axis, which is provided with highly wear-resistant, abrasive bodies.
- the known expanding heads Since the expanding heads have to be rotated at a speed between 0 and 200 revolutions per minute during the drilling process, the transmission of the rotational energy through the drill rod is a problem. In particular when stopping the rotation, the known expanding heads can stress the drill rod by excessive torsional forces and thereby may be permanently deformed. In addition, the known expansion heads have the problem that the removal of the drilling suspension and the removed earth materials is inadequate, as a result of which the soil can be raised above the drilling.
- This technical problem is in a widening head with a carrier axis, which has a first fastening device for a drill pipe and a second fastening device for a material to be drawn in, as well as bores for supplying a drilling suspension, an expanding body with highly wear-resistant, abrasive bodies being arranged on the carrier axis is achieved in that the expansion body consists of at least two individual, disc-like expansion elements of different diameters, which are arranged at a mutual distance on the carrier axis.
- the expanding head according to the invention has a significantly lower mass than the known expanding heads, since it is constructed from individual disk-like elements which are arranged at a mutual distance from one another on the carrier axis. This can, on the one hand, for a given Rotational energy can be drilled at a higher speed. On the other hand, the expanding head according to the invention causes only a slight twisting of the drill pipe when stopping.
- At least one of the expansion elements is provided with bores for the supply of the drilling suspension.
- the drilling suspension can be blasted from the disk-like expansion elements in any direction, in particular forwards, backwards and outwards, which facilitates the expansion and removal of the drilled material.
- the expansion elements are also provided with highly wear-resistant, abrasive bodies, the expansion work is carried out by both mechanical and hydraulic work.
- At least one of the expansion elements is provided with passage openings in a region between the carrier axis and the outer circumference of the expansion element.
- the widening element consists of an outer ring rim, which with at least three radially extending webs inner ring rim is connected, which in turn surrounds the carrier axis.
- the mass of such an expansion head is reduced as much as possible.
- such an expansion head has very good drilling properties, since both the drilling suspension and the drilled material mix particularly well due to the openings between the radially extending webs and can be removed from the borehole.
- the expansion elements are detachably attached to the carrier axis.
- an expansion head with a variable, i.e. adjustable outer diameter created.
- Such an expansion head has the great advantage over the known expansion heads with a diameter that cannot be changed, that the dimensions of the expansion head can be changed by mounting expansion plates of different sizes.
- the expansion head can be quickly adapted to the requirements with just a few simple steps.
- the abrasive bodies are arranged on the outer ring rim of the expansion element at different radial distances.
- Such an expansion head has particularly good drilling properties.
- the disk-like expansion elements have a diameter of approximately 40 to 500 mm. This allows cables up to a diameter of approx. 500 mm to be drawn into the borehole.
- the expansion head according to the invention means that the above described advantages achieved, depending on the drilling diameter, three, four or more disk-like expansion elements may be required.
- the expanding head shown in FIG. 1 consists of a carrier axis 10 which is fastened to a drill rod 13 with a first fastening device 12.
- the material 15 to be drawn in is fastened to the carrier axis 10 via a second fastening device 14.
- Holes (not shown) are provided in the carrier axis 10 for the supply of a drilling suspension.
- Four disc-like expansion elements 16 of different diameters are arranged on the support axis at a mutual axial distance.
- the outer diameter of the expansion elements increases counter to the drilling direction, as a result of which the expansion head has a basically conical shape.
- FIG. 2 shows an example of an expansion element 16 from the front.
- This consists of an outer ring rim 22, which is connected to an inner ring rim 24 via three radially extending webs 26.
- the inner ring rim 24 is provided with a rectangular center opening 25 through which the carrier axis 10 extends in the assembled state. Due to the structure described above, the carrier element 16 has three openings 20 which extend over the entire axial thickness of the Expand element 16.
- a plurality of abrasive bodies 28 are arranged on the outer ring rim 22 both on an outer surface and on the peripheral surface, only a few of which are indicated in FIG. 2.
- the outer diameter of the expansion elements 16 is between 40 and 500 mm.
- the outer diameter of the expansion head can be adjusted in a few simple steps. Depending on the requirements, several expansion elements 16 of different diameters are mounted on the carrier axis 10, the minimum and the maximum outer diameter and the opening angle of the expansion head being easily adjustable by the selection of the different expansion elements.
- each expansion element 16 there are several bores 18 (FIG. 2) through which the drilling suspension can exit.
- the bores 18 are connected to the bores (not shown) in the carrier axis 10. The choice of the size and the exit angle of the bores 18 allows the exit of the drilling suspension to be controlled in any desired manner.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Drilling Tools (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Earth Drilling (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Paper (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
Die Erfindung betrifft einen Aufweitkopf für Bohrsysteme zum unterirdischen Verlegen von Leitungen.The invention relates to an expansion head for drilling systems for the underground laying of lines.
Bei derartigen Bohrsystemen wird eine Systemlanze unter einem Winkel von ca. 15 bis 30° in den Boden eingeführt und nach Erreichen der vorgesehenen Verlegetiefe waagerecht bis zu einer vorher erstellten Montagegrube ferngesteuert vorgetrieben. Nachdem die Systemlanze die Montagegrube erreicht hat, wird die Lanze demontiert und die zu verlegende Leitung wird am Bohrgestänge befestigt und im Rückwärtsgang in die Bohrung eingezogen. Hierbei kann es jedoch erforderlich sein, die bereits erstellte Bohrung mit Hilfe eines Aufweitkopfes zu erweitern, falls der Durchmesser der einzuziehenden Leitungen den Durchmesser der Systemlanze übersteigt.In such drilling systems, a system lance is inserted into the ground at an angle of approximately 15 to 30 ° and, after reaching the intended installation depth, driven horizontally up to a previously created assembly pit. After the system lance has reached the assembly pit, the lance is dismantled and the line to be laid is attached to the drill pipe and pulled into the hole in reverse. In this case, however, it may be necessary to expand the bore already created with the aid of an expanding head if the diameter of the lines to be drawn in exceeds the diameter of the system lance.
Derartige Aufweitköpfe sind beispielsweise aus dem Prospekt "Was bedeutet FlowTex für Deutschland?" aus dem Jahr 1986 bekannt. Sie bestehen aus einer Trägerachse mit einer ersten Befestigungseinrichtung für das Bohrgestänge sowie einer zweiten Befestigungseinrichtung für das einzuziehende Material. In der Trägerachse sind Bohrungen vorgesehen, durch die eine Bohrsuspension zugeführt wird, die das Lösen und die Abfuhr des Erdmaterials erleichtert. Ferner besteht der bekannte Aufweitkopf aus einem an der Trägerachse befestigten, grundsätzlich konisch verlaufenden Aufweitkörper, der mit hochverschleißfesten, abrasiven Körpern versehen ist.Such expanding heads are, for example, from the brochure "What does FlowTex mean for Germany?" known from 1986. They consist of a carrier axis with a first fastening device for the drill pipe and a second fastening device for the material to be drawn in. Bores are provided in the carrier axis through which a drilling suspension is supplied, which facilitates the loosening and removal of the earth material. Furthermore, the known expansion head consists of a basically conical expansion body attached to the carrier axis, which is provided with highly wear-resistant, abrasive bodies.
Da die Aufweitköpfe beim Bohrvorgang mit einer Geschwindigkeit zwischen 0 bis 200 Umdrehungen pro Minute gedreht werden müssen, stellt die Übertragung der Rotationsenergie durch das Bohrgestänge ein Problem dar. Insbesondere beim Stoppen der Rotation kann bei den bekannten Aufweitköpfen das Bohrgestänge durch zu große Torsionskräfte beansprucht und dadurch unter Umständen bleibend verformt werden. Darüber hinaus stellt sich bei den bekannten Aufweitköpfen das Problem, daß die Abfuhr der Bohrsuspension und der abgetragenen Erdmaterialien unzureichend ist, wodurch Hebungen des Bodens oberhalb der Bohrung auftreten können.Since the expanding heads have to be rotated at a speed between 0 and 200 revolutions per minute during the drilling process, the transmission of the rotational energy through the drill rod is a problem. In particular when stopping the rotation, the known expanding heads can stress the drill rod by excessive torsional forces and thereby may be permanently deformed. In addition, the known expansion heads have the problem that the removal of the drilling suspension and the removed earth materials is inadequate, as a result of which the soil can be raised above the drilling.
Es ist deshalb das der vorliegenden Erfindung zugrundeliegende Problem, einen Aufweitkopf zu schaffen, der bessere Rotationseigenschaften aufweist und eine verbesserte Abfuhr der abgetragenen Bodenbestandteile ermöglicht.It is therefore the problem underlying the present invention to create an expanding head which has better rotational properties and enables improved removal of the removed soil components.
Dieses technische Problem (Aufgabe) wird bei einem Aufweitkopf mit einer Trägerachse, die eine erste Befestigungseinrichtung für ein Bohrgestänge sowie eine zweite Befestigungseinrichtung für ein einzuziehendes Material sowie Bohrungen für die Zufuhr einer Bohrsuspension aufweist, wobei an der Trägerachse ein Aufweitkörper mit hochverschleißfesten, abrasiven Körpern angeordnet ist, dadurch gelöst, daß der Aufweitkörper aus zumindest zwei einzelnen, scheibenartigen Aufweitelementen unterschiedlichen Durchmessers besteht, die in einem gegenseitigen Abstand an der Trägerachse angeordnet sind.This technical problem (task) is in a widening head with a carrier axis, which has a first fastening device for a drill pipe and a second fastening device for a material to be drawn in, as well as bores for supplying a drilling suspension, an expanding body with highly wear-resistant, abrasive bodies being arranged on the carrier axis is achieved in that the expansion body consists of at least two individual, disc-like expansion elements of different diameters, which are arranged at a mutual distance on the carrier axis.
Der erfindungsgemäße Aufweitkopf besitzt gegenüber den bekannten Aufweitköpfen eine deutlich geringere Masse, da dieser aus einzelnen scheibenartigen Elementen aufgebaut ist, die in gegenseitigem Abstand an der Trägerachse angeordnet sind. Hierdurch kann einerseits bei gegebener Rotationsenergie mit einer höheren Drehzahl gebohrt werden. Andererseits bedingt der erfindungsgemäße Aufweitkopf ein nur geringes Verwinden des Bohrgestänges beim Stoppen.The expanding head according to the invention has a significantly lower mass than the known expanding heads, since it is constructed from individual disk-like elements which are arranged at a mutual distance from one another on the carrier axis. This can, on the one hand, for a given Rotational energy can be drilled at a higher speed. On the other hand, the expanding head according to the invention causes only a slight twisting of the drill pipe when stopping.
Weiterhin erfolgt durch den scheibenartigen Aufbau des Aufweitkopfes eine sehr innige Vermischung zwischen der Bohrsuspension und den abgetragenen Boden-, Stein- oder Felsbestandteilen. Diese innige Vermischung führt infolge der thixotropen Eigenschaften der Bohrsuspension zu einem besonders guten Abfluß der Suspension und des gebohrten Materials aus dem Bohrloch. Hierdurch werden Bodenhebungen oberhalb der Bohrung vermieden, was insbesondere bei größerer Bohrdurchmessern von großer Bedeutung ist.Furthermore, due to the disc-like structure of the expansion head, there is a very intimate mixing between the drilling suspension and the removed soil, stone or rock components. Due to the thixotropic properties of the drilling suspension, this intimate mixing leads to a particularly good drainage of the suspension and the drilled material from the borehole. In this way, floor elevations above the bore are avoided, which is particularly important for larger bore diameters.
Nach einer vorteilhaften Ausführungsform der Erfindung ist zumindest eines der Aufweitelemente mit Bohrungen für die Zufuhr der Bohrsuspension versehen. Hierdurch kann die Bohrsuspension aus den scheibenartigen Aufweitelementen in jeder beliebigen Richtung, insbesondere nach vorn, hinten und außen gestrahlt werden, was das Aufweiten und den Abtransport des gebohrten Materials erleichtert. Da die Aufweitelemente zudem mit hochverschleißfesten, abrasiven Körpern versehen sind, wird die Aufweitarbeit sowohl durch mechanische als auch durch hydraulische Arbeit geleistet.According to an advantageous embodiment of the invention, at least one of the expansion elements is provided with bores for the supply of the drilling suspension. As a result, the drilling suspension can be blasted from the disk-like expansion elements in any direction, in particular forwards, backwards and outwards, which facilitates the expansion and removal of the drilled material. Since the expansion elements are also provided with highly wear-resistant, abrasive bodies, the expansion work is carried out by both mechanical and hydraulic work.
Nach einer weiteren Ausbildung der Erfindung ist zumindest eines der Aufweitelemente in einem Bereich zwischen der Trägerachse und dem Außenumfang des Aufweitelementes mit Durchlaßöffnungen versehen. Hierdurch wird die zu rotierende Masse des Aufweitkopfes noch weiter verringert, was sowohl die Rotationseigenschaften des Aufweitkopfes verbessert wie auch zu einer besseren Vermischung zwischen Bohrsuspension und abgetragenem Material führt.According to a further embodiment of the invention, at least one of the expansion elements is provided with passage openings in a region between the carrier axis and the outer circumference of the expansion element. As a result, the mass of the expander head to be rotated is reduced even further, which both improves the rotational properties of the expander head and also leads to better mixing between the drilling suspension and the removed material.
Nach einer weiteren vorteilhaften Lösung der Erfindung besteht das Aufweitelement aus einem äußeren Ringkranz, der über mindestens drei radial verlaufende Stege mit einem inneren Ringkranz verbunden ist, welcher wiederum die Trägerachse umgibt. Die Masse eines derartigen Aufweitkopfes ist einerseits bestmöglich verringert. Andererseits besitzt ein derartiger Aufweitkopf sehr gute Bohreigenschaften, da sowohl die Bohrsuspension wie auch das gebohrte Material sich aufgrund der Öffnungen zwischen den radial verlaufenden Stegen besonders gut vermischt und aus dem Bohrloch entfernt werden kann.According to a further advantageous solution of the invention, the widening element consists of an outer ring rim, which with at least three radially extending webs inner ring rim is connected, which in turn surrounds the carrier axis. The mass of such an expansion head is reduced as much as possible. On the other hand, such an expansion head has very good drilling properties, since both the drilling suspension and the drilled material mix particularly well due to the openings between the radially extending webs and can be removed from the borehole.
Nach einer besonders vorteilhaften Ausführungsform der Erfindung sind die Aufweitelemente lösbar an der Trägerachse befestigt. Hierdurch ist bei Verwendung verschiedener Aufweitelemente unterschiedlichen Durchmessers ein Aufweitkopf mit variablem, d.h. einstellbarem Außendurchmesser geschaffen. Ein derartiger Aufweitkopf besitzt gegenüber den bekannten Aufweitköpfen mit nicht veränderbarem Durchmesser den großen Vorteil, daß durch die Montage unterschiedlich großer Aufweitscheiben die Abmessungen des Aufweitkopfes veränderbar sind. Hierbei kann die Anpassung des Aufweitkopfes an die Anforderungen schnell mit Hilfe weniger Handgriffe erfolgen.According to a particularly advantageous embodiment of the invention, the expansion elements are detachably attached to the carrier axis. As a result, when using different expansion elements of different diameters, an expansion head with a variable, i.e. adjustable outer diameter created. Such an expansion head has the great advantage over the known expansion heads with a diameter that cannot be changed, that the dimensions of the expansion head can be changed by mounting expansion plates of different sizes. The expansion head can be quickly adapted to the requirements with just a few simple steps.
Nach einer weiteren Ausbildung der Erfindung sind die abrasiven Körper an dem äußeren Ringkranz des Aufweitelementes in unterschiedlichem radialen Abstand angeordnet. Ein derartiger Aufweitkopf weist besonders gute Bohreigenschaften auf.According to a further embodiment of the invention, the abrasive bodies are arranged on the outer ring rim of the expansion element at different radial distances. Such an expansion head has particularly good drilling properties.
Nach einer vorteilhaften Ausführungsform der Erfindung weisen die scheibenartigen Aufweitelemente einen Durchmesser von ca. 40 bis 500 mm auf. Hierdurch können Leitungen bis zu einem Durchmesser von ca. 500 mm in das Bohrloch eingezogen werden. Insbesondere bei derartig großen Bohrdurchmessern werden durch den erfindungsgemäßen Aufweitkopf die oben geschilderten Vorteile erzielt, wobei je nach Bohrdurchmesser auch drei, vier oder mehr scheibenartige Aufweitelemente erforderlich sein können.According to an advantageous embodiment of the invention, the disk-like expansion elements have a diameter of approximately 40 to 500 mm. This allows cables up to a diameter of approx. 500 mm to be drawn into the borehole. In particular with such large drilling diameters, the expansion head according to the invention means that the above described advantages achieved, depending on the drilling diameter, three, four or more disk-like expansion elements may be required.
Ein Ausführungsbeispiel der vorliegenden Erfindung wird anhand der beigefügten Zeichnungen beispielhaft beschrieben. Es zeigen
- Fig. 1
- eine Seitenansicht eines erfindungsgemäßen Aufweitkopfes in einem Bohrloch; und
- Fig. 2
- eine Vorderansicht eines erfindungsgemäßen Aufweitelementes.
- Fig. 1
- a side view of an expanding head according to the invention in a borehole; and
- Fig. 2
- a front view of an expansion element according to the invention.
Der in Fig. 1 gezeigte Aufweitkopf besteht aus einer Trägerachse 10, die mit einer ersten Befestigungseinrichtung 12 an einem Bohrgestänge 13 befestigt ist. Das einzuziehende Material 15 ist über eine zweite Befestigungseinrichtung 14 an der Trägerachse 10 befestigt. In der Trägerachse 10 sind nicht dargestellte Bohrungen für die Zufuhr einer Bohrsuspension vorgesehen. An der Trägerachse sind in gegenseitigem axialen Abstand vier scheibenartige Aufweitelemente 16 unterschiedlichen Durchmessers angeordnet. Hierbei nimmt der Außendurchmesser der Aufweitelemente entgegen der Bohrrichtung zu, wodurch der Aufweitkopf eine grundsätzlich konische Form aufweist.The expanding head shown in FIG. 1 consists of a
Fig. 2 zeigt beispielhaft ein Aufweitelement 16 von vorne. Dieses besteht aus einem äußeren Ringkranz 22, der über drei radial verlaufende Stege 26 mit einem inneren Ringkranz 24 verbunden ist. Der innere Ringkranz 24 ist mit einer rechteckigen Zentrumsöffnung 25 versehen, durch die sich in montiertem Zustand die Trägerachse 10 erstreckt. Durch den oben beschriebenen Aufbau weist das Trägerelement 16 drei Öffnungen 20 auf, die sich über die gesamte axiale Dicke des Aufweitelementes 16 erstrecken. Am äußeren Ringkranz 22 sind sowohl auf einer Außenfläche wie auch auf der Umfangsfläche mehrere abrasive Körper 28 angeordnet, von denen in Fig. 2 nur einige angedeutet sind. Der Außendurchmesser der Aufweitelemente 16 beträgt zwischen 40 und 500 mm.2 shows an example of an
Da die Aufweitelemente 16 lösbar an der Trägerachse 10 angeordnet sind, läßt sich der Außendurchmesser des Aufweitkopfes mit wenigen Handgriffen einstellen. Hierbei werden je nach Anforderung mehrere Aufweitelemente 16 unterschiedlichen Durchmessers an der Trägerachse 10 montiert, wobei sich der minimale und der maximale Außendurchmesser sowie der Öffnungswinkel des Aufweitkopfes durch die Auswahl der verschiedenen Aufweitelemente leicht einstellen lassen.Since the
In jedem Aufweitelement 16 befinden sich mehrere Bohrungen 18 (Fig. 2), durch welche die Bohrsuspension austreten kann. Hierbei stehen die Bohrungen 18 mit den (nicht gezeigten) Bohrungen in der Trägerachse 10 in Verbindung. Durch die Wahl der Größe und des Austrittswinkels der Bohrungen 18 läßt sich der Austritt der Bohrsuspension in jeder gewünschten Weise steuern.In each
Bei dem in den Fig. 1 und 2 gezeigten Aufweitkopf erfolgt eine besonders innige Vermischung zwischen Bohrsuspension und abgetragenen Boden-, Stein- oder Felsbestandteilen. Aufgrund der Konstruktion des Aufweitkopfes kann die Flüssigkeit gut aus dem Bohrloch abfließen, wodurch Hebungen des Bodens oberhalb der Bohrung ausgeschlossen sind.In the expansion head shown in FIGS. 1 and 2, there is a particularly intimate mixing between the drilling suspension and the removed soil, stone or rock components. Due to the construction of the expansion head, the liquid can flow out of the borehole, which means that there is no lifting of the soil above the borehole.
Claims (7)
dadurch gekennzeichnet, daß
zumindest eines der Aufweitelemente (16) mit Bohrungen (18) für die Zufuhr der Bohrsuspension versehen ist.Expander head according to claim 1,
characterized in that
at least one of the expansion elements (16) is provided with bores (18) for the supply of the drilling suspension.
dadurch gekennzeichnet, daß
zumindest eines der Aufweitelemente (16) in einem Bereich zwischen der Trägerachse und dem Außenumfang des Aufweitelementes mit mehreren Öffnungen (20) versehen ist.Expander head according to claim 1,
characterized in that
at least one of the expansion elements (16) is provided with a plurality of openings (20) in a region between the carrier axis and the outer circumference of the expansion element.
dadurch gekennzeichnet, daß
das Aufweitelement aus einem äußeren Ringkranz (22) besteht, der über mindestens drei radial verlaufende Stege (26) mit einem inneren Ringkranz (24) verbunden ist, welcher die Trägerachse (10) umgibt.Expander head according to claim 3,
characterized in that
the expanding element consists of an outer ring rim (22) which is connected via at least three radially extending webs (26) to an inner ring rim (24) which surrounds the carrier axis (10).
dadurch gekennzeichnet, daß
die Aufweitelemente (16) lösbar an der Trägerachse (10) befestigt sind.Expander head according to claim 1,
characterized in that
the expansion elements (16) are detachably attached to the carrier axis (10).
dadurch gekennzeichnet, daß
die abrasiven Körper an dem äußeren Ringkranz des Aufweitelementes in unterschiedlichem radialen Abstand angeordnet sind.Expander head according to claim 4,
characterized in that
the abrasive bodies are arranged on the outer ring rim of the expansion element at different radial distances.
dadurch gekennzeichnet, daß
die scheibenartigen Aufweitelemente (16) einen Durchmesser von ca. 40 - 500 mm aufweisen.Expander head according to claim 1,
characterized in that
the disk-like expansion elements (16) have a diameter of approximately 40-500 mm.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4134095A DE4134095C1 (en) | 1991-10-15 | 1991-10-15 | |
DE4134095 | 1991-10-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0537624A1 true EP0537624A1 (en) | 1993-04-21 |
EP0537624B1 EP0537624B1 (en) | 1996-02-21 |
Family
ID=6442718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92117188A Expired - Lifetime EP0537624B1 (en) | 1991-10-15 | 1992-10-08 | Reaming tool |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0537624B1 (en) |
AT (1) | ATE134416T1 (en) |
DE (1) | DE4134095C1 (en) |
DK (1) | DK0537624T3 (en) |
ES (1) | ES2086042T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2324820A (en) * | 1997-05-02 | 1998-11-04 | Tracto Technik | Device for widening an earth borehole |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4220430C2 (en) * | 1992-06-24 | 1994-09-22 | Tracto Technik | Method and device for making an earth borehole |
DE4403040C2 (en) * | 1994-01-28 | 1997-09-11 | Schwarzloh Hans Peter | Expanding head for expanding a pilot hole in the loose rock area |
EP0718461A3 (en) * | 1994-12-19 | 1998-04-29 | FLOWTEX TECHNOLOGIE-IMPORT VON KABELVERLEGEMASCHINEN GmbH | Method and apparatus for laying a conduit in a stop-type trench arrangement |
DE19523769C1 (en) * | 1994-12-19 | 1996-08-08 | Flowtex Technologie Import Von | Device and method for laying cables in a trench-like arrangement |
AT1296U1 (en) * | 1995-12-22 | 1997-02-25 | Rabmer Josef | METHOD AND DEVICE FOR LAYING PIPELINES WITHOUT CURLING |
DE10144973B4 (en) * | 2001-09-12 | 2004-02-05 | Tracto-Technik Gmbh | Wing remover, method of drilling with a wing remover and its use |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1701427A (en) * | 1927-02-23 | 1929-02-05 | Bert Russell | Rotary drilling and reaming tool organization |
FR1427180A (en) * | 1964-12-22 | 1966-02-04 | Lorraine Houilleres | Boring method and device allowing its implementation |
US3967689A (en) * | 1974-09-25 | 1976-07-06 | Tidril Corporation | Reaming apparatus |
US4402372A (en) * | 1979-09-24 | 1983-09-06 | Reading & Bates Construction Co. | Apparatus for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein |
-
1991
- 1991-10-15 DE DE4134095A patent/DE4134095C1/de not_active Expired - Fee Related
-
1992
- 1992-10-08 DK DK92117188.0T patent/DK0537624T3/en active
- 1992-10-08 EP EP92117188A patent/EP0537624B1/en not_active Expired - Lifetime
- 1992-10-08 ES ES92117188T patent/ES2086042T3/en not_active Expired - Lifetime
- 1992-10-08 AT AT92117188T patent/ATE134416T1/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1701427A (en) * | 1927-02-23 | 1929-02-05 | Bert Russell | Rotary drilling and reaming tool organization |
FR1427180A (en) * | 1964-12-22 | 1966-02-04 | Lorraine Houilleres | Boring method and device allowing its implementation |
US3967689A (en) * | 1974-09-25 | 1976-07-06 | Tidril Corporation | Reaming apparatus |
US4402372A (en) * | 1979-09-24 | 1983-09-06 | Reading & Bates Construction Co. | Apparatus for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2324820A (en) * | 1997-05-02 | 1998-11-04 | Tracto Technik | Device for widening an earth borehole |
DE19718527C2 (en) * | 1997-05-02 | 2002-10-17 | Tracto Technik | Device for expanding an earth borehole |
Also Published As
Publication number | Publication date |
---|---|
DE4134095C1 (en) | 1992-07-16 |
ES2086042T3 (en) | 1996-06-16 |
ATE134416T1 (en) | 1996-03-15 |
EP0537624B1 (en) | 1996-02-21 |
DK0537624T3 (en) | 1996-07-08 |
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