EP0439821B1 - Cutting crown for casings with easily exchangeable teeth - Google Patents
Cutting crown for casings with easily exchangeable teeth Download PDFInfo
- Publication number
- EP0439821B1 EP0439821B1 EP90125346A EP90125346A EP0439821B1 EP 0439821 B1 EP0439821 B1 EP 0439821B1 EP 90125346 A EP90125346 A EP 90125346A EP 90125346 A EP90125346 A EP 90125346A EP 0439821 B1 EP0439821 B1 EP 0439821B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- teeth
- sockets
- cutting
- tooth
- cutting crown
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005553 drilling Methods 0.000 claims description 4
- 230000036346 tooth eruption Effects 0.000 claims 1
- 230000008439 repair process Effects 0.000 description 7
- 238000003801 milling Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 241000209035 Ilex Species 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
- E21B10/485—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type with inserts in form of chisels, blades or the like
-
- 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
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
Definitions
- the invention relates to a cutting crown according to the preamble of claim 1 for drill pipes for drilling a cased bore, for example for pile foundations or well bores; (see e.g. DE-A-537 686).
- a milling drum for road milling machines is also known, with recesses into which interchangeable milling teeth are inserted, and which is characterized in that the recess consists of an inwardly tapering lower and an upper, in cross-sectional dimensions Consistent part, which ends on the outer surface of the roller, and that the milling tooth consists of a lower conical in the frustoconical part of the recess and an upper part which has a cross-section matching the cross section of the upper part of the recess.
- the present invention has for its object to provide a cutting crown which allows the necessary maintenance or repair work to be carried out with relatively simple means and quickly on site, and in which the teeth in the very limited wall thickness of the front area can be used interchangeably.
- a very important further advantage of the measure according to the invention is the possibility of quickly and easily adapting to different soil conditions on site by exchanging the teeth for a set of other teeth, wherein there is also the possibility of a large number of possible and suitable ones without great effort appearing and in particular also to use novel tooth shapes.
- Exchangeable teeth used in sleeves are already known for augers and excavators, but they have correspondingly more favorable space conditions the arrangement and accommodation of the sleeve and tooth than is the case with the cutting crown according to the invention, in which only a very limited wall thickness is available for the accommodation. It was therefore feared that the teeth could not withstand the stress and, in particular, break out in the relatively rough operation to which such cutting crowns are subjected.
- interchangeable teeth according to the invention can be adapted advantageously and with little effort to a different nature of the soil to be drilled, the experts went to the possibility of taking the known measure in sleeves interchangeable teeth can also be used on cutting crowns, so far carelessly over.
- the tongue-shaped sleeve 1 is provided with a bevel on its front and back along its edge, which is welded to the correspondingly shaped recess in the base body of the cutting crown, not shown. As indicated by the dashed lines, the continuous truncated pyramid-shaped recess 2 is made in the sleeve 1. Furthermore, the through hole 3 is provided in the sleeve.
- the sleeve 1 could also be designed differently, for example rectangular, trapezoidal or the like, and accordingly the cutouts in the base body of the cutting crown.
- the extension could also be designed differently than shown, for example as a truncated pyramid-shaped blind hole, but also with another suitable cross-sectional shape.
- the bore 3 which could have a different, for example rectangular or square, cross-sectional shape instead of the circular cross-section, although the cylindrical cross-sectional shape shown is particularly simple in terms of production technology.
- the one-piece tooth 4 has the tooth base 5, which is formed in the shape of a truncated pyramid with the recess 2 of the sleeve 1, and the tooth head 7 adjoining this by means of the step-shaped shoulder 6.
- the through hole 8 is made, which in each case one with the Bore 3 of the sleeve 1 has a matching cross-sectional shape.
- the tooth 3 is inserted with its foot 5 into the recess 2 of the sleeve 1 so that the bore 8 is exactly aligned with the bore 3 of the sleeve 1, so that subsequent insertion of an adapter sleeve, not shown here, a grooved pin or the like If necessary, lock sleeve 1 and tooth 4 rigidly together.
- the shape of the tooth head shown in FIGS. 2a and 2b and 3 and 4 is only exemplary and can be varied in different ways.
- the step-shaped heel 6 can be made more or less wide, or it can be dispensed with entirely.
- the tooth head can also have a cross-sectional shape other than that shown, depending on the type of soil for which it is to be used.
- the cutting surface 12 shown can be armored from a particularly suitable special material or that the entire tooth tip 7 is made uniformly from one and the same material, for example from Widia steel, or reinforced with soldered Widia pins can.
- the tooth 4 is inserted with its foot 5 in the recess 2 of the sleeve 1 with the shoulder 6 and the tooth base 5 and the sleeve 1 by means of the clamping sleeve 9 inserted into the holes 3 and 8, in their place a solid notch pin or the like could also be provided, releasably connected to one another again.
- the sleeve 1 is welded along its outer edge 11 to the cutting shoe 10 of the cutting crown, which is otherwise not shown.
- FIG. 6 which shows the sleeve 1 according to FIG. 1a with the tooth 4 inserted therein according to FIG. 2a, it can be seen that the tooth head with its cutting surface 12 projects beyond the outer surface 13 of the sleeve 1.
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Drilling Tools (AREA)
- Component Parts Of Construction Machinery (AREA)
- Sampling And Sample Adjustment (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
Description
Die Erfindung betrifft eine Schneidkrone gemäß dem Oberbegriff des Anspruches 1 für Bohrrohre zum Niederbringen einer verrohrten Bohrung, zum Beispiel für Pfahlgründungs- oder Brunnenbohrungen; (siehe z.B. DE-A- 537 686).The invention relates to a cutting crown according to the preamble of
Bei solchen Schneidkronen ist es bekannt, die Zähne unter Belassung enger Zahnlücken aus dem vollen Grundkörper durch Ausbrennen zu formen und an den Verschleißstellen mit einer Auftragung aus verschleißfestem Material zu versehen sowie scharfkantig zu schleifen. Bekannt ist es auch, am freien stirnseitigen Ende des Grundkörpers Aussparungen anzubringen und in diese passend geschmiedete Zähne einzuschweißen und diese an den Zahnkanten und/oder Stirnflächen gegebenenfalls mit einer Spezialhartauftragung zu versehen.In the case of such cutting crowns, it is known to shape the teeth from the full base body while leaving narrow tooth gaps, and to provide them with an application made of wear-resistant material at the wear points and to grind them with sharp edges. It is also known to provide cutouts on the free end face of the base body and to weld suitably forged teeth into them and to optionally provide these with a special hard coating on the tooth edges and / or end faces.
Diese Schneidkronen sind sowohl bei ihrer erstmaligen Herstellung, also auch insbesondere infolge ihres in Abhängikeit von der Bodenbeschaffenheit oft verhältnismäßig großen und schnellen Verschleißes hinsichtlich ihrer Instandhaltung sehr aufwendig. Dies gilt sowohl für den Fall, daß die erforderlichen Instandsetzungsarbeiten vor Ort vorgenommen werden, wo meist unter erschwerten Bedingungen gearbeitet werden muß, als auch für den Fall, daß die Schneidkrone zur Reparatur und Wiederherstellung des einwandfreien Zustandes in eine dafür eingerichtete Werkstatt mit ihren an sich besseren Arbeitsmöglichkeiten verbracht wird.These cutting crowns are very expensive to maintain both when they are first manufactured, and in particular because of their relatively large and rapid wear, depending on the nature of the soil. This applies both in the event that the necessary repair work is carried out on site, where work usually has to be carried out under difficult conditions, and in the event that the cutting crown is used for Repair and restoration of the perfect condition is spent in a workshop with its better work opportunities.
Aus der DE-A 25 39 707 ist darüber hinaus eine Fräswalze für Straßenfräsmaschinen bekannt, mit Ausnehmungen, in die auswechselbare Fräszähne eingesetzt sind, und die dadurch gekennzeichnet ist, daß die Ausnehmung aus einem sich nach innen verjüngenden unteren und einem oberen, in den Querschnittsabmessungen gleichbleibenden, an der Außenfläche der Walze endenden Teil besteht, und daß der Fräszahn aus einem unteren konischen in den kegelstumpfartigen Teil der Ausnehmung passenden und aus einem oberen Teil besteht, der einen in den Querschnitt des oberen Teils der Ausnehmung passenden Querschnitt aufweist.From DE-A 25 39 707 a milling drum for road milling machines is also known, with recesses into which interchangeable milling teeth are inserted, and which is characterized in that the recess consists of an inwardly tapering lower and an upper, in cross-sectional dimensions Consistent part, which ends on the outer surface of the roller, and that the milling tooth consists of a lower conical in the frustoconical part of the recess and an upper part which has a cross-section matching the cross section of the upper part of the recess.
Eine derartige Anordnung auswechselbarer Zähne wäre an der vergleichsweise dünnwandigen Stirnseite einer rohrförmigen Bohrkrone nicht möglich, weil der durch Bohrungen geschwächte stirnseitige Bereich der Bohrkrone unter Betriebslast ausbrechen und zum Ausfallen der Bohrkrone führen würde.Such an arrangement of interchangeable teeth would not be possible on the comparatively thin-walled end face of a tubular drill bit because the end region of the drill bit weakened by bores would break out under operating load and lead to the drill bit failing.
Vorliegende Erfindung macht es sich zur Aufgabe, eine Schneidkrone zu schaffen, die es gestattet, daß die notwendigen Instandhaltungs- bzw. Instandsetzungsarbeiten mit verhältnismäßig einfachen Mitteln und schnell vor Ort vorgenommen werden können, und bei welcher die Zähne in die sehr begrenzte Wanddicke des stirnseitigen Bereiches mittels Hülsen auswechselbar eingesetzt werden können.The present invention has for its object to provide a cutting crown which allows the necessary maintenance or repair work to be carried out with relatively simple means and quickly on site, and in which the teeth in the very limited wall thickness of the front area can be used interchangeably.
Diese Aufgabe wird gemäß der Erfindung bei einer Schneidkrone der eingangs genannten Art durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved according to the invention in a cutting crown of the type mentioned by the characterizing features of
Durch die erfindungsgemäße Ausbildung ist es in vorteilhafter Weise möglich, die instandzusetzenden Zähne bzw. unter Umständen sämtliche Zähne schnell und einfach vom Grundkörper der Schneidkrone durch Lösen ihrer Verbindung mit den Hülsen zu entfernen und durch einwandfreie andere bzw. einen Satz neuer Zähne zu ersetzen. Die wiederinstandsetzungsbedüftigen und -fähigen Zähne können dann zwecks Überholung zur Werkstatt verbracht werden, ohne daß dadurch der Bohrbetrieb in nennenswertem Maß gestört wird.With the design according to the invention, it is advantageously possible to quickly and easily remove the teeth to be repaired or, under certain circumstances, all teeth from the base body of the cutting crown by releasing their connection with the sleeves and to replace them with flawless other teeth or a set of new teeth. The teeth requiring repair and repair can then be taken to the workshop for overhaul without the drilling operation being significantly disrupted.
Ein ganz wesentlicher weiterer Vorteil der erfindungsgemäßen Maßnahme ist die Möglichkeit, sich durch Austauschen der Zähne gegen einen Satz anderer Zähne vor Ort schnell und einfach an unterschiedliche Bodenbeschaffenheiten anzupassen, wobei darüberhinaus auch noch die Möglichkeiten gegeben ist, ohne größeren Aufwand eine Vielzahl von möglichen und geeignet erscheinenden und insbesondere auch neuartigen Zahnformen zum Einsatz zu bringen.
In Hülsen eingesetzte auswechselbare Zähne sind bei Bohrschnecken und auch Baggern zwar bereits bekannt, jedoch weisen diese entsprechend günstigere Platzverhältnisse für die Anordnung und Unterbringung von Hülse und Zahn auf, als dies bei der erfindungsgemäßen Schneidkrone der Fall ist, bei der nur eine sehr begrenzte Wanddicke für die Unterbringung zur Verfügung steht. Es wurde daher befürchtet, daß die Zähne bei dem verhältnismäßig rauhen Betrieb, dem solche Schneidkronen unterworfen sind, der Beanspruchung nicht standhalten und insbesondere ausbrechen könnten. Aus diesem Grund und auch, weil man nicht erkannt hatte, daß man sich mit den erfindungsgemäßen auswechselbaren Zähne vorteilhaft und mit geringem Aufwand an eine unterschiedliche Beschaffenheit des zu durchbohrenden Erdreiches anpassen kann, ging die Fachwelt an der Möglichkeit, die an sich bekannte Maßnahme in Hülsen einsetzbare auswechselbare Zähne auch bei Schneidkronen anzuwenden, bisher achtlos vorbei.A very important further advantage of the measure according to the invention is the possibility of quickly and easily adapting to different soil conditions on site by exchanging the teeth for a set of other teeth, wherein there is also the possibility of a large number of possible and suitable ones without great effort appearing and in particular also to use novel tooth shapes.
Exchangeable teeth used in sleeves are already known for augers and excavators, but they have correspondingly more favorable space conditions the arrangement and accommodation of the sleeve and tooth than is the case with the cutting crown according to the invention, in which only a very limited wall thickness is available for the accommodation. It was therefore feared that the teeth could not withstand the stress and, in particular, break out in the relatively rough operation to which such cutting crowns are subjected. For this reason and also because it had not been recognized that the interchangeable teeth according to the invention can be adapted advantageously and with little effort to a different nature of the soil to be drilled, the experts went to the possibility of taking the known measure in sleeves interchangeable teeth can also be used on cutting crowns, so far carelessly over.
Zweckmäßige weitere Ausgestaltungen der Erfindung sind in den Unteransprüchen beschrieben.Advantageous further developments of the invention are described in the subclaims.
Die Erfindung ist in der Zeichnung in einem Ausführungsbeispiel gezeigt, anhand dessen sie im folgenden erläutert wird.
Es zeigen:
- Figuren 1a und 1b:
- die Hülse in Ansicht und Seitenansicht,
- Figuren 2a und 2b:
- in gleicher Weise einen Zahn,
- Figur 3 :
- den Zahn der Figur 2a teilweise in einer Ansicht in Richtung des Pfeiles x,
- Figur 4 :
- einen Querschnitt längst der Linien A-A der Figur 2a,
- Figuren 5a und 5b:
- die in den Grundkörper der Schneidkrone eingeschweißte Hülse mit in diese eingesetztem Zahn in Ansicht und teilweise im Schnitt sowie unter teilweiser Weglassung des Schneidschuhes in Seitenansicht und
- Figur 6 :
- eine Draufsicht auf die Hülse der Figur 1a, jedoch mit eingesetztem Zahn entsprechend Figur 2a.
Show it:
- Figures 1a and 1b:
- the sleeve in view and side view,
- Figures 2a and 2b:
- in the same way a tooth,
- Figure 3:
- the tooth of Figure 2a partially in a view in the direction of arrow x,
- Figure 4:
- 3 shows a cross section along lines AA of FIG. 2a,
- Figures 5a and 5b:
- the sleeve welded into the base body of the cutting crown with the tooth inserted into it in view and partially in section and with partial omission of the cutting shoe in side view and
- Figure 6:
- a plan view of the sleeve of Figure 1a, but with an inserted tooth corresponding to Figure 2a.
Die zungenförmig ausgebildete Hülse 1 ist längs ihres Randes, der mit der entsprechend geformten Aussparung im nicht gezeigten Grundkörper der Schneidkrone verschweißt wird, auf ihrer Vorder- und Rückseite mit einer Anschrägung versehen. Wie durch die gestrichelten Linien angedeutet, ist in der Hülse 1 die durchgehende pyramidenstumpfförmige Ausnehmung 2 angebracht. Ferner ist in der Hülse die durchgehende Bohrung 3 vorgesehen.The tongue-
Anstatt wie gezeigt zungenförmig, könnte die Hülse 1 auch anders, beispielsweise rechteckig, trapezförmig oder dergleichen und dementsprechend auch die Aussparungen im Grundkörper der Schneidkrone ausgebildet werden. Ebenso könnte auch die Ausdehnung anders als gezeigt ausgebildet werden, beispielsweise als pyramidenstumpfförmiges Sackloch, aber auch mit einer anderen geeigneten Querschnittsform. Entsprechendes gilt auch in Bezug auf die Bohrung 3, die anstelle des kreisrunden Querschnittes auch eine andere, beispielsweise rechteckige oder quadratische, Querschnittsform aufweisen könnte, wenngleich die gezeigte zylindrische Querschnittsform herstellungstechnisch besonders einfach ist.Instead of being tongue-shaped as shown, the
Der einstückig ausgebildete Zahn 4 weist gemäß den Figuren 2a und 2b den mit der Ausnehmung 2 der Hülse 1 übereinstimmend pyramidenstumpfförmig ausgebildeten Zahnfuß 5 und den mittels des stufenförmigen Absatzes 6 an diesen anschließenden Zahnkopf 7 auf. Im Zahnfuß 5 ist die durchgehende Bohrung 8 angebracht, die in jedem Fall eine mit der Bohrung 3 der Hülse 1 übereinstimmende Querschnittsform aufweist. Der Zahn 3 wird mit seinem Fuß 5 so in die Vertiefung 2 der Hülse 1 eingebracht, daß die Bohrung 8 mit der Bohrung 3 der Hülse 1 genau fluchtet, so daß sich durch anschließendes Einbringen einer nicht hier gezeigten Spannhülse, eines Kerbstiftes oder dergleichen, die Hülse 1 und der Zahn 4 gegebenenfalls starr miteinander verriegeln.According to FIGS. 2a and 2b, the one-piece tooth 4 has the
Die in den Figuren 2a und 2b sowie 3 und 4 gezeigte Form des Zahnkopfes ist nur beispielshaft und kann in verschiedener Weise variiert werden. So kann beispielsweise der stufenförmige Absatz 6 mehr oder weniger breit ausgeführt oder aber auf ihn auch ganz verzichtet werden. Ebenso kann der Zahnkopf eine andere als die gezeigte Querschnittsform erhalten, je nachdem, für welche Art von Erdreich er zum Einsatz zum Einsatz kommen soll. Schließlich ist im Bezug auf den Zahnkopf 7 auch noch zu erwähnen, daß die gezeigte Schneidfläche 12 aus einem besonders geeigneten speziellen Material aufgepanzert werden kann oder der gesamte Zahnkopf 7 einheitlich aus ein und demselben Material, beispielsweise aus Widiastahl hergestellt, oder mit eingelöteten Widiastiften bewehrt werden kann.The shape of the tooth head shown in FIGS. 2a and 2b and 3 and 4 is only exemplary and can be varied in different ways. For example, the step-shaped heel 6 can be made more or less wide, or it can be dispensed with entirely. The tooth head can also have a cross-sectional shape other than that shown, depending on the type of soil for which it is to be used. Finally, in relation to the tooth tip 7, it should also be mentioned that the
Gemäß Figuren 5a und 5b ist der Zahn 4 mit seinem Fuß 5 in die Vertiefung 2 der Hülse 1 mit dem Absatz 6 eingesetzt und sind der Zahnfuß 5 und die Hülse 1 mittels der in die Bohrungen 3 bzw. 8 eingesetzten Spannhülse 9, an deren Stelle auch ein massiver Kerbstift oder dergleichen vorgesehen sein könnte, wieder lösbar miteinander verbunden.According to Figures 5a and 5b, the tooth 4 is inserted with its
Die Hülse 1 ist längs ihres äußeren Randes 11 mit dem Schneidschuh 10 der im übrigen nicht gezeigten Schneidkrone verschweißt.The
In der Draufsicht gemäß Figur 6, die die Hülse 1 gemäß Figur 1a mit in dieser eingesetztem Zahn 4 gemäß Figur 2a zeigt, ist zu erkennen, daß der Zahnkopf mit seiner Schneidfläche 12 über die Außenfläche 13 der Hülse 1 übersteht.In the plan view according to FIG. 6, which shows the
Für den Fall einer notwendigen Instandsetzung einzelner oder auch aller Zähne 4 genügt es, die Spannhülsen zu entfernen, woraufhin die Zähne aus den Hülsen 1 herausgenommen werden und durch neue oder bereits instandgesetzte Zähne ersetzt werden können, so daß der Bohrbetrieb mit nur kurzer Unterbrechung weitergeführt wrden kann, während die ausgewechselten Zähne gegebenenfalls zur Instandsetzung in die Werkstatt verbracht werden.In the case of a necessary repair of individual or all teeth 4, it is sufficient to remove the clamping sleeves, whereupon the teeth are removed from the
Claims (5)
- Cutting crown for bore casings or tubes for drilling tube-lined bores comprising a basic body (10), which basic body is formed as a substantially cylindrical ring and is weldable to a bore casing or tube or is releasably connectable, optionally indirectly via a connecting ring, by means of threaded bolts or the like, to a bore casing or tube, thus forming an extension of said bore casing or tube, and which, at its free end face, is provided with cutting teeth (4) extending beyond said free end face and beyond the outside of the basic body and distributed at even distances along the circumference, characterized in that the teeth (4) are indirectly connected to the basic body via sockets (1) which are welded into recesses in the basic body and completely fill said recesses, whereby the sockets are provided with a cavity (2) for fittingly receiving and attaching the tooth bases (5) formed on the teeth, and in that the cavities (2) in the sockets (1), and the tooth bases (5) are in the form of truncated pyramids.
- Cutting crown according to claim 1, characterized in that the recesses and sockets (1) are tongue-shaped.
- Cutting crown according to claim 2, characterized in that the cavity in the sockets (1), which is in the form of a truncated pyramid, is through-going.
- Cutting crown according to any one of claims 1 to 3, characterized in that the tooth bases (5) verge into the tooth heads (7) by means of a polydirectional stepped shoulder (6).
- Cutting crown according to any one of claims 1 to 4, characterized in that the sockets (1) and the tooth bases (5) are provided with radial openings (3 and 8, respectively) and are connected with one another optionally in a rigid manner, but releasably, by means of clamping sleeves (9), grooved pins, or the like, inserted into said radial openings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90125346T ATE95889T1 (en) | 1990-02-01 | 1990-12-22 | CUTTING BIT FOR DRILL TUBE WITH SIMPLE INTERCHANGEABLE TEETH. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4002907A DE4002907A1 (en) | 1990-02-01 | 1990-02-01 | Cylindrical cutting head forms extension of borehole drill pipe |
| DE4002907 | 1990-02-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0439821A1 EP0439821A1 (en) | 1991-08-07 |
| EP0439821B1 true EP0439821B1 (en) | 1993-10-13 |
Family
ID=6399180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90125346A Expired - Lifetime EP0439821B1 (en) | 1990-02-01 | 1990-12-22 | Cutting crown for casings with easily exchangeable teeth |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0439821B1 (en) |
| AT (1) | ATE95889T1 (en) |
| DE (2) | DE4002907A1 (en) |
| DK (1) | DK0439821T3 (en) |
| ES (1) | ES2047236T3 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9206657U1 (en) * | 1992-05-15 | 1993-09-16 | Töpfer, Rainer, 28870 Ottersberg | Rotary tool with carbide inserts |
| DE29612342U1 (en) | 1996-07-16 | 1996-09-12 | Bauer Spezialtiefbau Gmbh, 86529 Schrobenhausen | Progressive screw drills |
| DE20100550U1 (en) | 2001-01-12 | 2001-04-19 | Bauer Spezialtiefbau Gmbh, 86529 Schrobenhausen | Cutting tooth arrangement |
| DE10205643C1 (en) | 2002-02-12 | 2003-10-16 | Betek Bergbau & Hartmetall | Drill bit with detachable cutting teeth |
| DE10205644B4 (en) * | 2002-02-12 | 2006-03-02 | Betek Bergbau- Und Hartmetalltechnik Karl-Heinz Simon Gmbh & Co. Kg | drilling |
| JP4211541B2 (en) | 2003-09-01 | 2009-01-21 | ソニー株式会社 | Recording control system and recording reservation processing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE537686C (en) * | 1930-08-14 | 1931-11-09 | Haniel & Lueg Gmbh | Rotary drill bit with adjustable knives |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3072205A (en) * | 1960-02-26 | 1963-01-08 | Salem Tool Co | Auger reaming head |
| US3749449A (en) * | 1971-10-13 | 1973-07-31 | Cincinnati Mine Machinery Co | Means for removably affixing cutter bit and lug assemblies to driven elements of a mining machine or the like |
| DE2349711A1 (en) * | 1972-10-12 | 1974-05-02 | Austin Hoy & Co Ltd | PICK HOLDER FOR CUTTER FOR MINERAL MATERIALS |
| DE2539707A1 (en) * | 1975-09-06 | 1977-03-17 | Marks & Co | Road surface cutter roller replaceable tooth - has conical bottom and constant top sections fitting corresponding roller recess |
| DE3637456A1 (en) * | 1986-06-09 | 1988-05-11 | Erich Wezel | Hollow drill bit |
| GB8622605D0 (en) * | 1986-09-19 | 1986-10-22 | Wimet Mining Ltd | Mineral cutting |
-
1990
- 1990-02-01 DE DE4002907A patent/DE4002907A1/en active Granted
- 1990-12-22 DE DE90125346T patent/DE59003087D1/en not_active Expired - Fee Related
- 1990-12-22 EP EP90125346A patent/EP0439821B1/en not_active Expired - Lifetime
- 1990-12-22 DK DK90125346.8T patent/DK0439821T3/en active
- 1990-12-22 AT AT90125346T patent/ATE95889T1/en active
- 1990-12-22 ES ES90125346T patent/ES2047236T3/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE537686C (en) * | 1930-08-14 | 1931-11-09 | Haniel & Lueg Gmbh | Rotary drill bit with adjustable knives |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4002907A1 (en) | 1991-08-08 |
| ES2047236T3 (en) | 1994-02-16 |
| DE59003087D1 (en) | 1993-11-18 |
| DK0439821T3 (en) | 1994-03-07 |
| ATE95889T1 (en) | 1993-10-15 |
| DE4002907C2 (en) | 1992-01-02 |
| EP0439821A1 (en) | 1991-08-07 |
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