EP0141117A1 - Rock and gravel drilling method and rock-drill therefor - Google Patents

Rock and gravel drilling method and rock-drill therefor Download PDF

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Publication number
EP0141117A1
EP0141117A1 EP84110110A EP84110110A EP0141117A1 EP 0141117 A1 EP0141117 A1 EP 0141117A1 EP 84110110 A EP84110110 A EP 84110110A EP 84110110 A EP84110110 A EP 84110110A EP 0141117 A1 EP0141117 A1 EP 0141117A1
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preferably according
rock
nozzle
drilling
drill
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EP84110110A
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German (de)
French (fr)
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EP0141117B2 (en
EP0141117B1 (en
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Walter Weber
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Schwarz Guenter
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Schwarz Guenter
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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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids

Definitions

  • the present invention relates to a method for drilling rock and gravel soils, in which the cuttings are conveyed out of the borehole by means of compressed air, and to a flushing device for rock and gravel bores.
  • the present invention aims to provide a method which overcomes these disadvantages and the realization of a flushing device for rock and gravel bores, which allows large specific drilling to achieve performance, effortlessly drill larger drilling depths of a few 10 m, and which also allows larger grains, for example 20 mm in diameter, to be pneumatically extracted from the borehole.
  • the flushing device with which such a method can be carried out, is characterized by means for generating an air flow which is directed in the opposite direction to the drilling feed and which flows around the drilling rod at least approximately in an annular manner.
  • An attachment 1 for a rock or gravel hammer drill is provided at both ends with a screw nipple 3 or 4, which are welded into a jacket 9.
  • An annular nozzle 10 is formed on the jacket 9 and is fed via four feed bores 11 of a central compressed air bore 7.
  • the compressed air bore 7 passes through the two screw nipples 3 and 4 and the middle part 6 holding them.
  • the feed bores 11 are kinked and form a catch pocket 13.
  • the ring nozzle 10 which blows out against the drilling direction, has an inner nozzle jacket 14 with a part 15 that widens upwards.
  • the outer limitation of the ring nozzle 10 takes place by means of an outer nozzle jacket 17 at the end the narrowest area of this compressed air system is designed as a nozzle mouth 18. It runs m.a.W. the nozzle chamber 19 together against the nozzle mouth 18, so that the nozzle chamber 19 forms an actual pressure chamber.
  • a flushing device is provided in the attachment 1, e.g. placed on a hammer.
  • the central compressed air bore 7 supplies the sink hammer with the compressed air required for impact drilling, as is known per se.
  • catch pockets is extremely important, so that when the compressed air is turned off, not fine drill material, in particular when a vacuum is formed, flows into the nozzle mouth or the nozzle chamber 19. and through the feed bores 11 into the central compressed air bore 7, because this would expose the lowering hammer underneath to rapid wear. The risk of nozzle clogging would also be significantly increased.
  • a special attachment 1 is shown for existing plunge hammers.
  • the gap width of the ring nozzles 10 used can be chosen between 0.2 and 1 mm, preferably in the range from 0.3 to 0.6 mm. Power is supplied through at least four feed holes 1 with a 5 mm diameter. Since a nozzle chamber 19 with pressure build-up is provided, the only requirement is that the total through-section of the feed bores 11 is considerably larger than the outlet cross-section of the nozzle mouth 18.
  • the drill rods can be provided with several flushing inserts or inserts 1 for large drilling depths.

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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)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

1. Method of drilling in rock or gravel soils, in which the drillings are conveyed outwards out of the drilled hole along a directed drilling column by means of compressed air exiting from the drill during drilling against the drill advance direction, characterized in that the exiting compressed-air jet, without any substantial effect resulting from the wall of the drilled hole, forms, in the immediate vicinity of the exit opening(s) (18) leading out of the drill, a self-contained compressed-air jet annular in cross-section and directed substantially axially upwards.

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Bohren von Gesteins- und Kiesböden, bei dem man den Bohrklein mittels Druckluft aus dem Bohrloch fördert sowie eine Spüleinrichtung für Gesteins- und Kiesbohrer.The present invention relates to a method for drilling rock and gravel soils, in which the cuttings are conveyed out of the borehole by means of compressed air, and to a flushing device for rock and gravel bores.

Es ist bekannt, beim Bohren von Gesteins- und Kiesböden das anfallende Bohrgut, den sog. Bohrklein, mittels Druckluft aus dem Bohrloch zu fördern.Zu diesem Zwecke wurde bisher aus zwei relativ kleinen Blasöffnungen entgegen der Bohrrichtung mit einer starken seitlichen Komponente Druckluft aus dem Bohrgestänge ausgeblasen. Dieses Vorgehen hat den Nachteil, dass die seitliche Komponente, insbesondere in Kiesböden, dazu neigt, gegenüber den beiden Düsen liegende Aushöhlungen freizulegen. Dies behindert nicht nur den Fördervorgang, sondern kann zusätzliches Gesteinsmaterial in den Bohrschacht bringen, was unerwünscht ist. Auch genügt diese Austragung nicht,grössere Körner, z.B. in Zentimetergrösse, zu fördern. Mit diesem Verfahren gelingt es kaum, insbesondere in kiesigem Boden, Bohrlöcher von über 10 m Tiefe zu bohren. Dieser Nachteil bringt es mit sich, dass gewisse Kiesgruben nicht mehr abbaubar wurden, und dass insbesondere zum Erstellen tieferer Bohrlöcher in gewissen Gesteinen ganz einfach die Mittel fehlten.When drilling rock and gravel soils, it is known to extract the drilling material, the so-called cuttings, from the borehole by means of compressed air. For this purpose, two relatively small blowing openings against the direction of drilling have been used to produce compressed air from the drill pipe with a strong lateral component blown out. This procedure has the disadvantage that the lateral component, particularly in gravel soils, tends to expose hollows lying opposite the two nozzles. This not only hinders the production process, but can also bring additional rock material into the well, which is undesirable. This discharge is also not sufficient, larger grains, e.g. in centimeters, to promote. With this method, it is hardly possible to drill holes of more than 10 m depth, especially in gravelly soil. This disadvantage means that certain gravel pits could no longer be mined and that there was simply no means to dig deeper holes in certain rocks.

Die vorliegende Erfindung bezweckt die Schaffung eines Verfahrens, welches diese Nachteile umgeht und die Verwirklichung einer Spüleinrichtung für Gesteins- und Kiesbohrer, welche erlaubt, grosse spezifische Bohrleistungen zu erreichen, mühelos grössere Bohrtiefen von einigen 10 m zu bohren, und welche gestattet, auch grössere Körner von beispielsweise 20 mm Durchmesser pneumatisch aus dem Bohrloch zu fördern.The present invention aims to provide a method which overcomes these disadvantages and the realization of a flushing device for rock and gravel bores, which allows large specific drilling to achieve performance, effortlessly drill larger drilling depths of a few 10 m, and which also allows larger grains, for example 20 mm in diameter, to be pneumatically extracted from the borehole.

Diese Aufgabe löst das erfindungsgemässe Verfahren, das sich dadurch auszeichnet, dass man das Bohrgestänge mittels Druckluft durch einen ringförmigen Luftstrahl ummantelt, um das Bohrgut pneumatisch nach oben zu fördern.This object is achieved by the method according to the invention, which is characterized in that the drill pipe is encased by compressed air through an annular air jet in order to pneumatically convey the drill material upwards.

Die Spüleinrichtung, mit welcher ein derartiges Verfahren durchgeführt werden kann, kennzeichnet sich durch Mittel zum Erzeugen einer dem Bohrvorschub entgegengesetzt gerichteten Luftströmung, welche die Bohrstange mindestens annähernd ringförmig beströmt.The flushing device, with which such a method can be carried out, is characterized by means for generating an air flow which is directed in the opposite direction to the drilling feed and which flows around the drilling rod at least approximately in an annular manner.

Die Erfindung wird anschliessend beispielsweise anhand einer Figur erläutert, welche einen Längsschnitt durch eine derartige Spüleinrichtung in rein schematischer Weise darstellt.The invention is subsequently explained, for example, with reference to a figure, which represents a longitudinal section through such a flushing device in a purely schematic manner.

Ein Aufsatz 1 für einen Gesteins- bzw. Kiesbohrhammer ist an beiden Enden mit je einem Schraubnippel 3 bzw. 4 versehen, welche in einen Mantel 9 eingeschweisst sind. Am Mantel 9 ist eine Ringdüse 10 gebildet, welche über vier Zuspeisebohrungen 11 einer mittigen Druckluftbohrung 7 gespiesen werden. Die Druckluftbohrung 7 durchsetzt die beiden Schraubnippel 3 und 4 sowie den sie haltenden Mittelteil 6.An attachment 1 for a rock or gravel hammer drill is provided at both ends with a screw nipple 3 or 4, which are welded into a jacket 9. An annular nozzle 10 is formed on the jacket 9 and is fed via four feed bores 11 of a central compressed air bore 7. The compressed air bore 7 passes through the two screw nipples 3 and 4 and the middle part 6 holding them.

Die Zuspeisebohrungen 11 sind geknickt und bilden eine Fangtasche 13. Die entgegen der Bohrrichtung ausblasende Ringdüse 10 weist einen inneren Düsenmantel 14 auf, mit einem sich nach oben erweiternden Teil 15. Die äussere Begrenzung der Ringdüse 10 erfolgt mittels eines äusseren Düsenmantels 17, an dessen Ende der engste Bereich dieses Druckluftsystems als Düsenmund 18 ausgebildet ist. Es läuft m.a.W. die Düsenkammer 19 gegen den Düsenmund 18 zusammen, so dass die Düsenkammer 19 eine eigentliche Druckkammer bildet. Im Betrieb wird eine derartige Spüleinrichtung inform des Aufsatzes 1, z.B. auf einen Senkhammer aufgesetzt. Die mittige Druckluftbohrung 7 versorgt den Senkhammer mit der zum Schlagbohren nötigen Druckluft, wie dies an und für sich bekannt ist. Während des Betriebes wird der Druckluftbohrung 7 durch vier Zuspeisebohrungen 11 Druckluft entnommen und damit die Düsenkammer 1.9 mit Druckluft aufgeladen, welche, sich beschleunigend,durch den ringförmigen Düsenmund 18 entweicht und damit den sich erweiternden Teil 15 des Mantels 9 ringförmig umspühlt. Die Austrittsgeschwindigkeit ist sehr gross, da das Druckverhältnis über dem kritischen liegt. Es kann m.a.W. theoretisch Schallgeschwindigkeit der austretenden Luft erreicht werden. Dadurch, dass die Hauptströmungsrichtung eindeutig in Richtung der Bohrstangenachse nach oben führt, ist ein seitliches Auswaschen der Bohrwände nicht möglich, und ein Fördern recht grosser Teile von einigen cm gegeben. So werden kugelige Steine von 20 mm Durchmesser mühelos auf einige 10 m Bohrlochtiefe nach oben gefördert.The feed bores 11 are kinked and form a catch pocket 13. The ring nozzle 10, which blows out against the drilling direction, has an inner nozzle jacket 14 with a part 15 that widens upwards. The outer limitation of the ring nozzle 10 takes place by means of an outer nozzle jacket 17 at the end the narrowest area of this compressed air system is designed as a nozzle mouth 18. It runs m.a.W. the nozzle chamber 19 together against the nozzle mouth 18, so that the nozzle chamber 19 forms an actual pressure chamber. In operation, such a flushing device is provided in the attachment 1, e.g. placed on a hammer. The central compressed air bore 7 supplies the sink hammer with the compressed air required for impact drilling, as is known per se. During operation, compressed air is removed from the compressed air bore 7 through four feed bores 11 and thus the nozzle chamber 1.9 is charged with compressed air, which, accelerating, escapes through the annular nozzle mouth 18 and thus rings around the widening part 15 of the jacket 9. The exit speed is very high because the pressure ratio is above the critical one. It can m.a.W. theoretically the speed of sound of the exiting air can be achieved. Because the main flow direction clearly leads upwards in the direction of the boring bar axis, it is not possible to wash out the drilling walls from the side, and quite large parts of a few cm are conveyed. Spherical stones with a diameter of 20 mm are easily extracted up to a depth of 10 m.

Es ist natürlich auch möglich, anstelle der dargestellten Ringdüse eine oder mehrere eng aneinanderliegende Lochreihen auf dem Umfang des Mantels 9 anzuordnen, auf welche Weise ebenfalls eine ringförmige Verteilung der pneumatischen Förderluft erreicht werden kann. Es ist auch möglich, grundsätzlich diese Oeffnungen oder die Ringdüse lavalförmig zu konzipieren, um nach Erreichen von Schallgeschwindigkeit im engsten Querschnitt die Luft auf Ueberschallgeschwindigkeit zu beschleunigen.It is of course also possible to arrange one or more rows of holes close to one another on the circumference of the jacket 9 instead of the ring nozzle shown, in which way an annular distribution of the pneumatic conveying air can also be achieved. It is also possible in principle to design these openings or the ring nozzle in a laval shape in order to accelerate the air to supersonic speed in the narrowest cross section after sound speed has been reached.

Das Anordnen von Fangtaschen ist ausserordentlich wichtig, damit bei abgestellter Druckluft nicht feines Bohrgut, insbesondere bei Unterdruckbildung, in den Düsenmund bzw. die Düsenkammer 19 fliesst. und durch die Zuspeisebohrungen 11 in die mittige Druckluftbohrung 7 gelangt, denn dadurch würde der darunter liegende Senkhammer einem raschen Verschleiss ausgesetzt. Auch wäre die Gefahr der Verstopfung der Düsen wesentlich vergrössert.The arrangement of catch pockets is extremely important, so that when the compressed air is turned off, not fine drill material, in particular when a vacuum is formed, flows into the nozzle mouth or the nozzle chamber 19. and through the feed bores 11 into the central compressed air bore 7, because this would expose the lowering hammer underneath to rapid wear. The risk of nozzle clogging would also be significantly increased.

Im erläuterten Beispiel ist ein besonderer Aufsatz 1 für bestehende Senkhämmer dargestellt. Grundsätzlich ist es aber auch möglich, die Ringdüse 10 oder gegebenenfalls einzelne ringförmig angeordnete Düsenlöcher unmittelbar nach der Bohrkrone anzuordnen, um damit das Bohrloch kontinuierlich und unverzüglich nach dem Ausbrechen des Gesteins vom Bohrgut zu befreien und damit nicht nur die Bohrleistung optimal zu gestalten, sondern auch einen entsprechenden Vorschub beim Bohren sicherzustellen.In the illustrated example, a special attachment 1 is shown for existing plunge hammers. In principle, however, it is also possible to arrange the ring nozzle 10 or, if appropriate, individual ring-shaped nozzle holes immediately after the drill bit, so that the drill hole is continuously and immediately cleared of the drill material after the rock has broken out and not only to optimize the drilling performance, but also ensure an appropriate feed rate when drilling.

Es hat sich gezeigt, dass bei einem Förderdruck von beispielsweise 7 bar, je nach Grösse der Bohrkrone variierend, für eine Bohrkrone von 76 mm Durchmesser ca. 5 m Press- luft/min gebraucht werden. Es ist aber auch möglich, je nach Grund, mit zwei bis drei m3/min zu fahren. Entsprechend andere Pressluftmengen, nämlich ungefähr mit dem Bohrkronendurchmesser quadratisch steigend, verlangen grössere Bohrkronen. Die Spaltbreite von verwendeten Ringdüsen 10 kann zwischen 0,2 und einem mm gewählt werden, vorzugsweise im Bereich von 0,3 bis 0,6 mm liegend. Die Speisung erfolgt durch mindestens vier Zuspeisebohrungen 1 mit 5 mm Durchmesser. Da eine Düsenkammer 19 mit Druckaufbau vorgesehen ist, liegt die einzige Bedingung darin, dass der Gesamtdurchgangsquerschnitt der Zuspeisebohrungen 11 wesentlich grösser ist als der Austrittsquerschnitt des Düsenmundes 18.It has been found that with a feed pressure of, for example, 7 bar, depending on the size of the drill bit varying, for a drill bit of diameter 76 mm approx 5 m P RESS air / min are used. But it is also possible, depending on the reason, to drive at two to three m 3 / min. Correspondingly different amounts of compressed air, namely increasing roughly with the drill bit diameter, require larger drill bits. The gap width of the ring nozzles 10 used can be chosen between 0.2 and 1 mm, preferably in the range from 0.3 to 0.6 mm. Power is supplied through at least four feed holes 1 with a 5 mm diameter. Since a nozzle chamber 19 with pressure build-up is provided, the only requirement is that the total through-section of the feed bores 11 is considerably larger than the outlet cross-section of the nozzle mouth 18.

Da die Zeichnung im Masstab 5:7 dargestellt ist, lassen sich dieser weitere Ausführungsmasse entnehmen. Zwecks stufenweiser Beschleunigung können bei grossen Bohrtiefen-die Bohrgestänge mit mehreren Spülauf- bzw. -einsätzen 1 versehen werden.Since the drawing is shown on a scale of 5: 7, this additional execution dimensions can be found. For step-by-step acceleration, the drill rods can be provided with several flushing inserts or inserts 1 for large drilling depths.

Claims (8)

1. Verfahren zum Bohren von Gesteins- und Kiesböden, bei dem man den Bohrklein mittels Druckluft aus dem Bohrloch fördert, dadurch gekennzeichnet, dass man das Bohrgestänge mittels Druckluft durch einen ringförmigen Luftstrahl ummantelt, um das Bohrgut pneumatisch nach oben zu fördern.1. A method for drilling rock and gravel soils, in which the cuttings are conveyed from the borehole by means of compressed air, characterized in that the drill pipe is encased by means of compressed air by means of an annular air jet in order to pneumatically convey the cuttings upwards. 2. Spüleinrichtung für Gesteins- und Kiesbohrer, vorzugsweise nach mindestens einem der Ansprüche, gekennzeichnet durch Mittel (10) zum Erzeugen einer dem Bohrvorschub entgegengesetzt gerichteten Luftströmung,welche die Bohrstange (6) mindestens annähernd ringförmig beströmt.
Spüleinrichtung, vorzugsweise nach mindestens einem der Ansprüche, dädurch gekennzeichnet, dass die Mittel mindestens eine Ringdüse (10) umfassen.2. Flushing device for rock and gravel bores, preferably according to at least one of the claims, characterized by means (10) for generating an air flow which is directed in the opposite direction to the drilling feed and which flows at least approximately in an annular manner through the boring bar (6).
Rinsing device, preferably according to at least one of the claims, characterized in that the means comprise at least one ring nozzle (10). 4. Spüleinrichtung, vorzugsweise nach mindestens einem der Ansprüche, dadurch gekennzeichnet, dass der innere Düsenmantel (14) sich in Strömungsrichtung erweitert (15), wobei die Erweiterung sich vorzugsweise über den äusseren Düsenmantel (17) hinaus erstreckt und einen Teil des Bohrgestängemantels (9) bildet.4. Flushing device, preferably according to at least one of the claims, characterized in that the inner nozzle casing (14) widens in the direction of flow (15), the enlargement preferably extending beyond the outer nozzle casing (17) and part of the drill pipe casing (9 ) forms. 5. Spüleinrichtung, vorzugsweise nach mindestens einem der Ansprüche, dadurch gekennzeichnet, dass die Düsenkammer (19) sich am Düsenmund (18) verengt.5. Rinsing device, preferably according to at least one of the claims, characterized in that the nozzle chamber (19) narrows at the nozzle mouth (18). 6. Spüleinrichtung, vorzugsweise nach mindestens einem der Ansprüche, dadurch gekennzeichnet, dass die Mittel eine Vielzahl von Einzeldüsen, die ringförmig angeordnet sind, umfassen.6. Rinsing device, preferably according to at least one of the claims, characterized in that the means comprise a plurality of individual nozzles which are arranged in a ring. 7. Spüleinrichtung, vorzugsweise nach mindestens einem der Ansprüche, dadurch gekennzeichnet, dass die Mittel lavaldüsenförmig ausgebildet sind, um eine Ueberschallströmung zu erzeugen.7. Flushing device, preferably according to at least one of the claims, characterized in that the means are designed in the form of a laval nozzle in order to generate a supersonic flow. 8. Spüleinrichtung, vorzugsweise nach mindestens einem der Ansprüche, dadurch gekennzeichnet, dass die Mittel (10) dazu vorgesehen sind, im unmittelbaren Bereich der Bohrkrone angeordnet zu werden.8. Flushing device, preferably according to at least one of the claims, characterized in that the means (10) are provided to be arranged in the immediate area of the drill bit. 9. Spüleinrichtung, vorzugsweise nach mindestens einem der Ansprüche, dadurch gekennzeichnet, dass die Zuspeisung der Druckluft über Fangtaschen (13) bildende Oeffnungen (11) erfolgt, um das Gestängeinnere (7) vor Bohrstaub zu schützen.9. Flushing device, preferably according to at least one of the claims, characterized in that the compressed air is fed in via openings (11) forming catch pockets (13) in order to protect the interior of the rod (7) from drilling dust.
EP84110110A 1983-08-31 1984-08-24 Rock and gravel drilling method and rock-drill therefor Expired - Lifetime EP0141117B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84110110T ATE35640T1 (en) 1983-08-31 1984-08-24 METHOD OF DRILLING ROCK AND GRAVEL SOILS AND ROCK DRILLS FOR CARRYING OUT THE METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4766/83 1983-08-31
CH476683 1983-08-31

Publications (3)

Publication Number Publication Date
EP0141117A1 true EP0141117A1 (en) 1985-05-15
EP0141117B1 EP0141117B1 (en) 1988-07-13
EP0141117B2 EP0141117B2 (en) 1993-09-22

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EP84110110A Expired - Lifetime EP0141117B2 (en) 1983-08-31 1984-08-24 Rock and gravel drilling method and rock-drill therefor

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EP (1) EP0141117B2 (en)
AT (1) ATE35640T1 (en)
DE (1) DE3472641D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1149979A1 (en) * 2000-04-29 2001-10-31 Western Atlas International, Inc. Portable seismic shothole drilling system
CN101265786B (en) * 2008-04-24 2012-04-25 西南石油大学 Gas drilling rock carrying tool
US8277645B2 (en) 2008-12-17 2012-10-02 Jarvis Jr Ernest Automatic retractable screen system for storm drain inlets

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110919544B (en) * 2019-12-18 2021-01-05 重庆市星极齿轮有限责任公司 Grinding machine with automatic sealing function

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DE253290C (en) *
DE306297C (en) *
DE528577C (en) * 1929-07-13 1932-01-28 Karl Brunzel Dr Dust removal when drilling with compressed air
US2867140A (en) * 1955-12-15 1959-01-06 Metal Cutting Tools Inc Core drill
US3011571A (en) 1961-01-23 1961-12-05 Bree Oscar L De Self cleaning rock drill bit
GB1071418A (en) * 1963-08-19 1967-06-07 P & V Mining & Engineering Ltd Improvements in rock-drilling tools
DE1552463A1 (en) * 1966-09-15 1970-07-23 Tiefbohr Technik Gmbh Single-lip bur
DE1652700A1 (en) * 1968-01-17 1971-11-25 Alfred Loch Maschinen U Appbau Deep drilling machine for machining metallic workpieces
US4083417A (en) 1976-11-12 1978-04-11 Arnold James F Jetting apparatus
FR2388624A1 (en) * 1977-04-25 1978-11-24 Cri Dan TUBE BORING DEVICE WITH REFRIGERANT LIQUID INJECTION

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE253290C (en) *
DE306297C (en) *
DE528577C (en) * 1929-07-13 1932-01-28 Karl Brunzel Dr Dust removal when drilling with compressed air
US2867140A (en) * 1955-12-15 1959-01-06 Metal Cutting Tools Inc Core drill
US3011571A (en) 1961-01-23 1961-12-05 Bree Oscar L De Self cleaning rock drill bit
GB1071418A (en) * 1963-08-19 1967-06-07 P & V Mining & Engineering Ltd Improvements in rock-drilling tools
DE1552463A1 (en) * 1966-09-15 1970-07-23 Tiefbohr Technik Gmbh Single-lip bur
DE1652700A1 (en) * 1968-01-17 1971-11-25 Alfred Loch Maschinen U Appbau Deep drilling machine for machining metallic workpieces
US4083417A (en) 1976-11-12 1978-04-11 Arnold James F Jetting apparatus
FR2388624A1 (en) * 1977-04-25 1978-11-24 Cri Dan TUBE BORING DEVICE WITH REFRIGERANT LIQUID INJECTION

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1149979A1 (en) * 2000-04-29 2001-10-31 Western Atlas International, Inc. Portable seismic shothole drilling system
US6540034B1 (en) 2000-04-29 2003-04-01 Westerngeco L.L.C. Portable seismic shothole drilling system
CN101265786B (en) * 2008-04-24 2012-04-25 西南石油大学 Gas drilling rock carrying tool
US8277645B2 (en) 2008-12-17 2012-10-02 Jarvis Jr Ernest Automatic retractable screen system for storm drain inlets

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Publication number Publication date
EP0141117B2 (en) 1993-09-22
ATE35640T1 (en) 1988-07-15
DE3472641D1 (en) 1988-08-18
EP0141117B1 (en) 1988-07-13

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