EP0565662B1 - Drilling process and device - Google Patents

Drilling process and device Download PDF

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Publication number
EP0565662B1
EP0565662B1 EP92921401A EP92921401A EP0565662B1 EP 0565662 B1 EP0565662 B1 EP 0565662B1 EP 92921401 A EP92921401 A EP 92921401A EP 92921401 A EP92921401 A EP 92921401A EP 0565662 B1 EP0565662 B1 EP 0565662B1
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EP
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Prior art keywords
drill
rotary
connection
tube
drilling
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EP92921401A
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German (de)
French (fr)
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EP0565662A1 (en
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Andrea Linard Mathis
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers

Definitions

  • the present invention relates to a drilling method according to the preamble of patent claim 1 and to a device for carrying out the proposed method.
  • a device for the overlay drilling of holes in rock covered with loose earth or rubble has also become known, which has an outer drill pipe having an outer drill bit and an inner drill rod with an inner drill bit and in which the outer and inner drill rods are connected to a flushing head to be coupled to a drilling and / or hammer mechanism.
  • a deep hole hammer is provided near the inner drill bit and forms a part of the inner drill pipe.
  • a device for overlay drilling which has an inner drill pipe with an inner drill bit and an outer drill pipe with an annular drill bit, which are subjected to a rotational impact.
  • a separate rotary impact drive with rotating mechanism and impact mechanism is provided for the inner and outer drill rods, which can be controlled independently of the other drive.
  • the pneumatically or hydraulically operated impact hammers have also proven to be excellent.
  • the pipe does not have to transmit any impact forces and torques and is therefore screwed into a holder with a normal right-hand thread.
  • a percussion and turning effect is generated pneumatically or hydraulically in the down-the-hole hammer and exerted on the chisel assembled with the hammer.
  • the object to be achieved by the invention is now to propose a drilling method and a device which allows a simultaneous work with a down-the-hole hammer and a hammer drill using the same installation. In doing so, neither the down-the-hole hammer should be damaged by the blows directed at the hammer drill, nor the pipe receiving the down-the-hole hammer loosened or loosened.
  • a first device specifically with the down-the-hole hammer, is pre-drilled and simultaneously a second device connected to the first device is used in the same operation and through the same installation, the first device being compared to the second device Device to act on certain drilling strokes and vibrations, is shock-absorbing isolated, so that the above-mentioned effects are absorbed, absorbed or at least damped.
  • the mentioned drilling strokes and vibrations therefore act practically exclusively on the second device, i.e. on the hydraulically operated hammer drill.
  • FIG. 1 shows a written representation of an expedient device for carrying out the method.
  • a hydraulic rotary hammer mechanism is designated by 1. This is known and is widely used in drilling installations.
  • a holder 2 is connected to the rotary impact mechanism, which has connections for an impact boring machine with an outer impact tube 3 and drill bit 4 and for an inner tube 5. At its end to be inserted into the borehole, this is equipped with a pneumatically or hydraulically drivable hammer drill 6.
  • the closer design of the holder 2 is subsequently explained with reference to FIG. 2.
  • the hammer drill 6 is designed as a down-the-hole hammer with a chisel 7, which protrudes somewhat from the impact tube 3, which surrounds the inner tube 5, as can be clearly seen from FIG.
  • the inner tube 5 is fastened in the holder 2 with the aid of a damping element 8, which absorbs or at least considerably dampens the impacts and vibrations exerted by the rotary impact mechanism 1 such that they no longer act on the inner tube 5 and thus on the hammer drill 6.
  • a pneumatic line 9 leads from the outside through the holder 2 and through the inner tube 5 to the hammer drill 6 and drives it.
  • the air emerging from the chisel 7 then serves to flush the ear material out of the borehole, which then passes through the annular cavity 10 is returned to the holder 2 and removed.
  • the holder 2 shows the holder 2 with the most important design features and details on an enlarged scale.
  • the holder 2 has a tubular housing 11 which is provided at one end with a sleeve 12 which projects from the housing and which has an internal thread 13 for fastening the outer impact tube 3.
  • the other end of the sleeve has a flange 14 which is fastened to the housing 11 by means of screws 15 on the facing end face.
  • a two-part nipple with the two parts 17 and 18 is arranged coaxially inside the housing 11, the first nipple 17 being screwed to a head part 19, which in turn is screwed into the housing 11 with its flange 20 at the open end.
  • the head part 19 is equipped with a connecting sleeve 27 for a rotary hammer mechanism.
  • a damping element 21 (designated 8 in FIG. 1) is clamped between the two nipples 17 and 18.
  • This can consist of an elastic material and can be formed in one or more layers.
  • the outstanding damping properties of the damping element 21, which absorbs and largely destroys the impacts and vibrations generated by a rotary impact mechanism, are essential.
  • an elastic disc there can also be a hydraulic or pneumatic damping element, which e.g. how a shock absorber can be designed.
  • a damping cylinder When using an appropriate damping cylinder, very strong impact forces can be dampened and absorbed. By adjusting the damping effect, the device can be easily adapted to the current requirements.
  • the rotary hammer mechanism which is known per se and which is designated by 1 in FIG. 1, is connected to the head part 19, the impacts generated being transmitted through the flange 20 to both the housing 11 and the flange of the nipple 17.
  • the housing 11 is connected by means of the sleeve 12 with the impact tube 3, which performs 4 drilling work under the action of the blows with the help of the crown.
  • the nipple 18, which is impact-insulated by the damping elements 21, is connected to a double sleeve 22 which has a connection 23 for the inner tube 5.
  • the latter carries the rotary hammer 5 with chisel 7 at its opposite end.
  • the rotary hammer works pneumatically, whereby compressed air is supplied through a line (not shown) which passes through the connection 24 and further through bores 25 and 26 into the nipple 17 and through one not Central bore of the damping element shown is guided further through the nipple 18 into the inner tube 5.
  • the proposed damping has the effect that the impact of the hydraulic rotary impact mechanism 1 is directed, so to speak, exclusively onto the outer impact tube 3 and the hammer drill 6 in the inner tube 5 does not suffer any damage. A loosening of the screw connection of the inner tube 5 is also excluded, since the vibration and the shocks of the hydraulic rotary hammer mechanism 1 are absorbed by the damping elements 21. Simultaneous work with both devices is made possible by pre-drilling with the pneumatically operated in-hole hammer and, in the same operation, the impact drill coupled with the in-hole hammer continuously and simultaneously enlarging the borehole.

Abstract

PCT No. PCT/CH92/00218 Sec. 371 Date Jul. 7, 1993 Sec. 102(e) Date Jul. 7, 1993 PCT Filed Oct. 26, 1992 PCT Pub. No. WO93/09328 PCT Pub. Date May 13, 1993.The invention provides a drilling method for drilling a bore-hole in ground or soil, with a percussion drilling device operated directly in the bore-hole and with a rotary percussion drilling device operated from the surface of the ground or soil, both devices being received in a common support member and adapted to be simultaneously operated, and a drilling assembly for preforming this method. In order to avoid a damage of the percussion drilling device, the drilling impact forces and vibrations directed to the rotary percussion drilling device are registered, elastically dampened and absorbed prior to having an effect on the percussion drilling device.

Description

Die vorliegende Erfindung bezieht sich auf ein Bohrverfahren nach dem Oberbegriff des Patenanspruchs 1 sowie auf eine Einrichtung zur Ausübung des vorgeschlagenen Verfahrens.The present invention relates to a drilling method according to the preamble of patent claim 1 and to a device for carrying out the proposed method.

Zur Bewältigung der verschiedensten Bohraufgaben unter Berücksichtigung der verschiedenen Bodenbeschaffenheiten, welche nicht nur von Ort zu Ort variieren können, sondern sich oft von der Oberfläche bis zum Baugrund ändern, sind bereits verschiedene Bohrverfahren sowie Bohreinrichtungen bekannt geworden. Insbesondere haben sich die hydraulisch betriebenen Schlagbohrwerke bewährt, welche ein Schlagrohr aufweisen, das am einen Ende einen Schlagbohrkranz trägt und mit Hilfe eines hydraulischen Drehschlagwerkes betrieben wird. Das Schlagrohr wird in einem Halter eingeschraubt, welcher mit dem Drehschlagwerk in Verbindung steht, wobei dafür Sorge getragen werden muss, dass beim Bohren unter der Dreh- und Schlageinwirkung das Drehrohr in der Verschraubung nicht gelöst oder gelockert wird.Various drilling methods and drilling devices have already become known for coping with a wide variety of drilling tasks, taking into account the various soil conditions, which can not only vary from place to place, but often change from the surface to the ground. In particular, the hydraulically operated percussion boring mills have proven themselves, which have a percussion tube which carries a percussion drilling ring at one end and is operated with the aid of a hydraulic rotary percussion mechanism. The impact tube is screwed into a holder, which is connected to the rotary impact mechanism, whereby care must be taken to ensure that the rotary tube is not loosened or loosened in the screw connection during drilling under the influence of rotation and impact.

Aus der DE-AS 1 298 066 ist ferner eine Vorrichtung zum Überlagerungsbohren von Löchern in mit lockerem Erdreich oder Geröll bedecktem Gestein bekannt geworden, welche ein Aussenbohrgestänge mit Aussenbohrkrone und ein Innenbohrgestänge mit Innenbohrkrone aufweist und bei welcher die Aussen- und Innenbohrgestänge mit einem an ein Bohr- und/oder Schlagwerk zu kuppelnden Spühlkopf verbunden sind. Dabei ist nahe der Innenbohrkrone ein Tieflochhammer vorgesehen, der ein Teilstück des Innenbohrgestänges bildet.From DE-AS 1 298 066 a device for the overlay drilling of holes in rock covered with loose earth or rubble has also become known, which has an outer drill pipe having an outer drill bit and an inner drill rod with an inner drill bit and in which the outer and inner drill rods are connected to a flushing head to be coupled to a drilling and / or hammer mechanism. A deep hole hammer is provided near the inner drill bit and forms a part of the inner drill pipe.

Ausserdem ist aus der DE-AS 19 09 931 eine Vorrichtung zum Überlagerungsbohren bekannt geworden, die ein Innenbohrgestänge mit Innenbohrkrone und ein Aussenbohrgestänge mit Ringbohrkrone aufweist, welche drehschlagend beaufschlagt sind. Für das Innenund das Aussenbohrgestänge ist jeweils ein eigener Drehschlagantrieb mit Drehwerk und Schlagwerk vorgesehen, der unabhängig von dem anderen Antrieb steuerbar ist.In addition, from DE-AS 19 09 931 a device for overlay drilling has become known, which has an inner drill pipe with an inner drill bit and an outer drill pipe with an annular drill bit, which are subjected to a rotational impact. A separate rotary impact drive with rotating mechanism and impact mechanism is provided for the inner and outer drill rods, which can be controlled independently of the other drive.

Ferner haben sich die pneumatisch oder hydraulisch betriebenen Schlaghämmer, die sog. Imlochhämmer, ebenfalls vorzüglich bewährt. Diese weisen wiederum ein Rohr auf, in welchem am einen Ende der Hammer mit Meissel angeordnet ist. Das Rohr muss bei diesen Geräten keine Schlagkräfte und Drehmomente übertragen und wird deshalb mit normalem Rechtsgewinde in einem Halter verschraubt. Eine Schlag- und Drehwirkung wird unmittelbar im Imlochhammer pneumatisch oder hydraulisch erzeugt und auf den mit dem Hammer zusammengebauten Meissel ausgeübt.Furthermore, the pneumatically or hydraulically operated impact hammers, the so-called down-the-hole hammers, have also proven to be excellent. These in turn have a tube in which the hammer with chisel is arranged at one end. With these devices, the pipe does not have to transmit any impact forces and torques and is therefore screwed into a holder with a normal right-hand thread. A percussion and turning effect is generated pneumatically or hydraulically in the down-the-hole hammer and exerted on the chisel assembled with the hammer.

Es wäre sehr oft erwünscht, bei entsprechenden geologischen Verhältnissen mit einem pneumatischen, sich im Bohrloch befindlichen Imlochhammer und mit einem hydraulisch oder pneumatisch von der Oberfläche aus betätigten Schlagbohrwerk simultan zu arbeiten. Dies ist bei der Verwendung der gleichen Installation, d.h. durch die Anordnung des Imlochhammers im Schlagrohr des Schlagbohrwerkes, nicht möglich, da die auf den Schlagbohrer gerichteten Schläge des Schlagbohrwerkes auch auf den Imlochhammer einwirken und diesen beschädigen und darüber hinaus unter ungünstigen Bedingungen die Erschütterungen ein Lösen des Rohrgewindes bewirken könnten.It would be very often desirable, given the geological conditions, to have a pneumatic one in the borehole In-hole hammer and to work simultaneously with a hammer drill operated hydraulically or pneumatically from the surface. This is not possible when using the same installation, i.e. due to the arrangement of the down-hole hammer in the percussion tube of the percussion boring machine, since the blows of the percussion boring machine directed at the percussion drill also act on and damage the down-the-hole hammer and, in addition, the vibrations are released under unfavorable conditions of the pipe thread could cause.

Die durch die Erfindung zu lösende Aufgabe besteht jetzt darin, ein Bohrverfahren und eine Einrichtung vorzuschlagen, welches bzw. welche ein simultanes Arbeiten mit einem Imlochhammer und einem Schlagbohrwerk unter Verwendung der gleichen Installation erlaubt. Dabei sollte weder der Imlochhammer durch die auf das Schlagbohrwerk gerichteten Schläge beschädigt, noch das den Imlochhammer aufnehmende Rohr gelöst oder gelockert werden.The object to be achieved by the invention is now to propose a drilling method and a device which allows a simultaneous work with a down-the-hole hammer and a hammer drill using the same installation. In doing so, neither the down-the-hole hammer should be damaged by the blows directed at the hammer drill, nor the pipe receiving the down-the-hole hammer loosened or loosened.

Zur Lösung der Aufgabe wird ein Verfahren mit dem Merkmalen des Anspruches 1 und eine Einrichtung mit den Merkmalen des Anspruches 2 vorgeschlagen.To achieve the object, a method with the features of claim 1 and a device with the features of claim 2 are proposed.

Besonders vorteilhafte Ausführungen des Verfahrens und der Einrichtung sind in den abhängigen Ansprüchen definiert.Particularly advantageous embodiments of the method and the device are defined in the dependent claims.

Auf beiliegender Zeichnung ist ein Ausführungsbeispiel der Einrichtung dargestellt, welche auch zur Erläuterung des Verfahrens dient.In the accompanying drawing, an embodiment of the device is shown, which also serves to explain the method.

Es zeigen:

Fig.1
eine rein schematische Darstellung der Einrichtung im vertikalen Axialschnitt, und
Fig.2
einen Vertikalschnitt durch einen Halter in einer gegenüber Fig.l vergrösserten Darstellung
Show it:
Fig. 1
a purely schematic representation of the device in vertical axial section, and
Fig. 2
a vertical section through a holder in an enlarged view compared to Fig.l.

Gemäss dem vorgeschlagenen Verfahren wird mit einem ersten Gerät, und zwar mit dem Imlochhammer, vorgebohrt und im gleichen Arbeitsgang und durch die gleiche Installation simultan ein mit dem ersten Gerät in Verbindung stehendes zweites Gerät eingesetzt, wobei das erste Gerät gegenüber den auftretenden, auf das zweite Gerät zu wirken bestimmten Bohrschlägen und Vibraticnen, schlagdämpfend isoliert wird, so dass die genannten Einwirkungen elastisch aufgefangen, absorbiert oder wenigstens gedämpft werden. Die genannten Bohrschläge und Vibrationen wirken somit praktisch ausschliesslich auf das zweite Gerät, d.h. auf das hydraulisch betriebene Schlagbohrwerk.According to the proposed method, a first device, specifically with the down-the-hole hammer, is pre-drilled and simultaneously a second device connected to the first device is used in the same operation and through the same installation, the first device being compared to the second device Device to act on certain drilling strokes and vibrations, is shock-absorbing isolated, so that the above-mentioned effects are absorbed, absorbed or at least damped. The mentioned drilling strokes and vibrations therefore act practically exclusively on the second device, i.e. on the hydraulically operated hammer drill.

Zur Illustration wird zunächst auf die Fig.1 verwiesen, welche eine schreibtische Darstellung einer zweckmässigen Einrichtung zur Ausübung des Verfahrens zeigt.For illustration, reference is first made to FIG. 1, which shows a written representation of an expedient device for carrying out the method.

Ein hydraulisches Drehschlagwerk ist mit 1 bezeichnet. Dies ist bekannt und wird vielfach in Bohrinstallationen verwendet. Mit dem Drehschlagwerk ist ein Halter 2 verbunden, welcher Anschlüsse für ein schlagbohrwerk mit äusserem Schlagrohr 3 und Bohrkrone 4 sowie für ein inneres Rohr 5 aufweist. Dies ist an seinem in das Bohrloch einzuführenden Ende mit einem pneumatisch oder hydraulisch antreibbaren Bohrhammer 6 ausgerüstet. Die nähere Ausbildung des Halters 2 wird an Hand der Fig.2 anschliessend erläutert. Der Bohrhammer 6 ist als Imlochhammer mit Meissel 7 ausgebildet, welcher etwas aus dem Schlagrohr 3 herausragt, das das innere Rohr 5 umgibt, wie dies aus der Fig.l deutlich erkennbar ist.A hydraulic rotary hammer mechanism is designated by 1. This is known and is widely used in drilling installations. A holder 2 is connected to the rotary impact mechanism, which has connections for an impact boring machine with an outer impact tube 3 and drill bit 4 and for an inner tube 5. At its end to be inserted into the borehole, this is equipped with a pneumatically or hydraulically drivable hammer drill 6. The closer design of the holder 2 is subsequently explained with reference to FIG. 2. The hammer drill 6 is designed as a down-the-hole hammer with a chisel 7, which protrudes somewhat from the impact tube 3, which surrounds the inner tube 5, as can be clearly seen from FIG.

Die Befestigung des inneren Rohres 5 im Halter 2 erfolgt mit Hilfe eines Dämpfungselementes 8, welches die vom Drehschlagwerk 1 ausgeübten Schläge und Vibrationen so absorbiert oder wenigstens erheblich dämpft, dass diese auf das innere Rohr 5 und somit auf den Bohrhammer 6 nicht mehr einwirken. Das äussere Schlagrohr 3 dagegen überträgt die Schläge und das Drehmoment auf die Bohrkrone 4.The inner tube 5 is fastened in the holder 2 with the aid of a damping element 8, which absorbs or at least considerably dampens the impacts and vibrations exerted by the rotary impact mechanism 1 such that they no longer act on the inner tube 5 and thus on the hammer drill 6. The outer impact tube 3, on the other hand, transmits the impacts and the torque to the drill bit 4.

Eine pneumatische Leitung 9 führt von aussen durch den Halter 2 und durch das innere Rohr 5 zum Bohrhammer 6 und treibt diesen an. Die aus dem Meissel 7 austretende Luft dient anschliessend zur Spülung des Eohrgutes aus dem Bohrloch, welches dann durch den ringförmigen Hohlraum 10 in den Halter 2 zurückgeführt und entfernt wird.A pneumatic line 9 leads from the outside through the holder 2 and through the inner tube 5 to the hammer drill 6 and drives it. The air emerging from the chisel 7 then serves to flush the ear material out of the borehole, which then passes through the annular cavity 10 is returned to the holder 2 and removed.

In der Fig.2 ist der Halter 2 mit den wichtigsten Konstruktionsmerkmalen und Einzelheiten vergrössert dargestellt. Der Halter 2 weist ein rohrförmiges Gehäuse 11 auf, welches an einem Ende mit einer aus dem Gehäuse ragenden Hülse 12 versehen ist, die ein Innengewinde 13 zum Befestigen des äusseren Schlagrohres 3 besitzt. Das andere Hülsenende weist einen Flansch 14 auf, der an der zugekehrten Stirnfläche das Gehäuse 11 mittels Schrauben 15 festgemacht ist. Mit 16 sind zwei Ausnehmungen im Gehäuse 11 bezeichnet. Im Inneren des Gehäuses 11 ist ein zweiteilieger Nippel mit den beiden Teilen 17 und 18 gleichachsig angeordnet, wobei der erste Nippel 17 mit einem Kopfteil 19 verschraubt ist, der seinerseits mit seinem Flansch 20 am offenen Ende des Gehäuses 11 in dieses eingeschraubt ist. Der Kopfteil 19 ist mit einer Anschlussmuffe 27 für ein Drehschlagwerk ausgerüstet.2 shows the holder 2 with the most important design features and details on an enlarged scale. The holder 2 has a tubular housing 11 which is provided at one end with a sleeve 12 which projects from the housing and which has an internal thread 13 for fastening the outer impact tube 3. The other end of the sleeve has a flange 14 which is fastened to the housing 11 by means of screws 15 on the facing end face. With 16 two recesses in the housing 11 are designated. A two-part nipple with the two parts 17 and 18 is arranged coaxially inside the housing 11, the first nipple 17 being screwed to a head part 19, which in turn is screwed into the housing 11 with its flange 20 at the open end. The head part 19 is equipped with a connecting sleeve 27 for a rotary hammer mechanism.

Zwischen den beiden Nippeln 17 und 18 ist ein Dämpfungselement 21 (in der Fig.1 mit 8 bezeichnet) eingespannt. Dieses kann aus einem elastischen Material bestehen und ein oder mehrschichtig ausgebildet sein.A damping element 21 (designated 8 in FIG. 1) is clamped between the two nipples 17 and 18. This can consist of an elastic material and can be formed in one or more layers.

Wesentlich sind die hervorragenden Dämpfungseigenschaften des Dämpfungselementes 21, welches die von einem Drehschlagwerk erzeugten Schläge und Vibrationen absorbiert und grösstenteils vernichtet.The outstanding damping properties of the damping element 21, which absorbs and largely destroys the impacts and vibrations generated by a rotary impact mechanism, are essential.

Anstelle einer elastischen Scheibe kann auch ein hydraulisches oder pneumatisches Dämpfungsorgan vorhanden sein, welches z.B. wie ein Stossdämpfer ausgebildet sein kann. Bei der Verwendung eines entsprechenden Dämpfungszylinders können sehr starke Schlagkräfte gedämpft und absorbiert werden. Durch die Einstellung der Dämpfwirkung kann eine einfache Anpassung der Einrichtung an die momentanen Erfordernisse vorgenommen werden.Instead of an elastic disc, there can also be a hydraulic or pneumatic damping element, which e.g. how a shock absorber can be designed. When using an appropriate damping cylinder, very strong impact forces can be dampened and absorbed. By adjusting the damping effect, the device can be easily adapted to the current requirements.

Das an und für sich bekannte Drehschlagwerk, welches in der Fig.1 mit 1 bezeichnet ist, wird mit dem Kopfteil 19 verbunden, wobei die erzeugten Schläge durch den Flansch 20 sowohl auf das Gehäuse 11 als auch auf den Flansch des Nippels 17 übertragen werden. Das Gehäuse 11 steht mittels der Hülse 12 mit dem Schlagrohr 3 in Verbindung, welches unter Wirkung der Schläge mit Hilfe der Krone 4 Bohrarbeit leistet.The rotary hammer mechanism, which is known per se and which is designated by 1 in FIG. 1, is connected to the head part 19, the impacts generated being transmitted through the flange 20 to both the housing 11 and the flange of the nipple 17. The housing 11 is connected by means of the sleeve 12 with the impact tube 3, which performs 4 drilling work under the action of the blows with the help of the crown.

Der durch die Dämpfungselemente 21 schlag-isolierte Nippel 18 steht mit einer Doppelmuffe 22 in Verbindung, die einen Anschluss 23 für das Innenrohr 5 besitzt. Letzteres trägt an seinem abgekehrten Ende den Bohrhammer 5 mit Meissel 7. Der Bohrhammer arbeitet pneumatisch, wobei Druckluft durch eine Leitung (nicht gezeigt) zugeführt wird, die durch den Anschluss 24 und weiter durch Bohrung 25 und 26 in den Nippel 17 und durch eine nicht dargestellte zentrale Bohrung des Dämpfungselementes durch den Nippel 18 weiter in das innere Rohr 5 geführt wird.The nipple 18, which is impact-insulated by the damping elements 21, is connected to a double sleeve 22 which has a connection 23 for the inner tube 5. The latter carries the rotary hammer 5 with chisel 7 at its opposite end. The rotary hammer works pneumatically, whereby compressed air is supplied through a line (not shown) which passes through the connection 24 and further through bores 25 and 26 into the nipple 17 and through one not Central bore of the damping element shown is guided further through the nipple 18 into the inner tube 5.

In dieser Weise wird ein sehr rationelles Arbeiten ermöglicht, bei welchem das Wechseln der Arbeitsgeräte vermieden werden kann. Die vorgeschlagene Dämpfung bewirkt, dass der Schlag des hydraulischen Drehschlagwerkes 1 sozusagen ausschliesslich auf das äussere Schlagrohr 3 gerichtet wird und der Bohrhammer 6 im inneren Rohr 5 keinerlei Schaden erleidet. Auch ein Lösen der Verschraubung des inneren Rohres 5 ist ausgeschlossen, da die Vibration und die Schläge des hydraulischen Drehschlagwerkes 1 durch die Dämpfungselemente 21 absorbiert werden. Es wird ein simultanes Arbeiten mit beiden Geräten ermöglicht, indem mit dem pneumatisch betriebenen Imlochhammer vorgebohrt und im selben Arbeitsgang das mit dem Imlochhammer gekoppelte Schlagbohrgerät das Bohrloch kontinuierlich und simultan vergrössert.In this way, a very efficient work is made possible, in which the changing of the tools can be avoided. The proposed damping has the effect that the impact of the hydraulic rotary impact mechanism 1 is directed, so to speak, exclusively onto the outer impact tube 3 and the hammer drill 6 in the inner tube 5 does not suffer any damage. A loosening of the screw connection of the inner tube 5 is also excluded, since the vibration and the shocks of the hydraulic rotary hammer mechanism 1 are absorbed by the damping elements 21. Simultaneous work with both devices is made possible by pre-drilling with the pneumatically operated in-hole hammer and, in the same operation, the impact drill coupled with the in-hole hammer continuously and simultaneously enlarging the borehole.

Es ist auch möglich, das äussere Schlagrohr 3 und/oder das innere Rohr 5 aus mehreren Teilrohren zusammenzuschrauben, wobei die üblichen Rechts- und Linksgewinde gebraucht werden können. Unter allen Umständen werden auch mehrteilige Innenrohre von Schlägen und Vibrationen verschont, so dass eine Lösung oder Lockerung der Schraubverbindungen nicht zu befürchten ist.It is also possible to screw the outer impact tube 3 and / or the inner tube 5 together from a plurality of partial tubes, it being possible to use the customary right-hand and left-hand threads. In all circumstances, multi-part inner tubes are protected from knocks and vibrations, so that there is no fear of loosening or loosening the screw connections.

Claims (6)

  1. Drilling method employing a reciprocating drill operated directly in the drill hole and a rotary-percussive drill operated from the surface, which are accommodated in a common holder and are intended for simultaneous use, characterized in that the drilling impacts and vibrations exerted on the rotary-percussive drill are caught, elastically damped and absorbed before they act on the reciprocating drill.
  2. Device for exercising the method according to Claim 1 with a hammer drill (6) attached to an inner tube (5) and having a bit (7), and with an outer tube (3) which surrounds the inner tube (5) and has a drill crown (4), characterized in that the outer tube (3) carrying the drill crown (4) and the inner tube (5), the latter with the interposition of a damping element (8), are secured in a common holder (2) connected to a rotary-percussive mechanism (1).
  3. Device according to claim 2, characterised in that the common holder (2) has a connection (12, 13) for the outer tube (3), a coaxially arranged inner connection (23) pointing in the same direction for the inner tube (5), and a connection (27) pointing in the opposite direction for the hydraulic rotary-percussive mechanism (1), the inner connection (23) being connected to a two-piece nipple (17, 18) which contains an impact-damping element (21) for absorbing the impacts imposed on the inner tube (5) via the inner connection (23), while the same impacts act in an undamped manner on the outer tube (3) in the direction of the holding-tube connection (13).
  4. Device according to claim 3, characterized in that the two parts of the two-piece nipple (17, 18) are provided at their mutually facing ends with corresponding flanges between which the impact-damping element (21) is clamped.
  5. Device according to Claim 4, characterized in that the two-piece nipple is accommodated in the sleeve-shaped housing (11) of the common holder (2), which holder (2) is in direct connection with the rotary-percussive mechanism (1).
  6. Device according to one of Claims 2-5, characterized in that the impact-damping element (21) is designed as a hydraulically or pneumatically operated damper.
EP92921401A 1991-11-08 1992-10-26 Drilling process and device Expired - Lifetime EP0565662B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH3267/91A CH683860A5 (en) 1991-11-08 1991-11-08 Drilling method and apparatus for performing the method.
CH3267/91 1991-11-08
PCT/CH1992/000218 WO1993009328A1 (en) 1991-11-08 1992-10-26 Drilling process and device

Publications (2)

Publication Number Publication Date
EP0565662A1 EP0565662A1 (en) 1993-10-20
EP0565662B1 true EP0565662B1 (en) 1996-09-11

Family

ID=4252285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92921401A Expired - Lifetime EP0565662B1 (en) 1991-11-08 1992-10-26 Drilling process and device

Country Status (15)

Country Link
US (1) US5355966A (en)
EP (1) EP0565662B1 (en)
JP (1) JP3444598B2 (en)
AT (1) ATE142742T1 (en)
AU (1) AU650581B2 (en)
CA (1) CA2100085C (en)
CH (1) CH683860A5 (en)
DE (2) DE4142733C2 (en)
DK (1) DK0565662T3 (en)
ES (1) ES2094372T3 (en)
FI (1) FI100419B (en)
GR (1) GR3021600T3 (en)
HK (1) HK214496A (en)
NO (1) NO305137B1 (en)
WO (1) WO1993009328A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19857479C1 (en) * 1998-12-14 2000-08-03 Guenter Klemm Impact absorbing mechanism for deep hole hammer drill, has air hole provided for connecting cylinder chamber and channel, which is closed by piston on exertion of axial force
EP1124037A1 (en) 2000-02-08 2001-08-16 Günter Prof. Dr.-Ing. Klemm Drilling device

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5979569A (en) * 1993-09-21 1999-11-09 Simulprobe Technologies, Inc. Method and apparatus for environmental sampling
SE9603413L (en) * 1996-09-19 1998-02-09 Atlas Copco Rocktech Ab Coupling piece for use in simultaneous ground and / or rock drilling with an upper rotary impact device and a lower impact device
US5873421A (en) * 1997-02-12 1999-02-23 Assenza; Antonio Tool for installing a pipeline under a structure
US6029687A (en) * 1998-11-25 2000-02-29 Chang; Chia-Bo Assembling structure for balance valve of cold/hot water mixing valve
US6009893A (en) * 1998-11-25 2000-01-04 Chang; Chia-Bo Assembling structure for balance valve of cold/hot water mixing valve
EP2029851B1 (en) * 2006-05-24 2018-08-29 BTD Bohrtechnik AG Mud shaft for the drill string of a rotary percussive drilling rig, impact stack for a mud shaft and rotary percussive drilling rig

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DE293308C (en) *
US2950087A (en) * 1955-10-24 1960-08-23 James N Gregory Combined rotary and percussion drilling
US3231032A (en) * 1960-04-05 1966-01-25 Atlas Copco Ab Apparatus for drilling in earth covered rock
US3227230A (en) * 1961-02-21 1966-01-04 Atlas Copco Ab Combination ring and central drill bit drilling equipment
DE1298066B (en) * 1967-06-07 1969-06-26 Boehler & Co Ag Geb Device for overlay drilling
AT281729B (en) * 1968-02-28 1970-05-25 Boehler & Co Ag Geb Device for overlay, anchor hole and / or underwater drilling
GB1257429A (en) * 1969-05-30 1971-12-15
AT293308B (en) * 1969-07-10 1971-09-15 Boehler & Co Ag Geb DEVICE FOR OVERLAY DRILLING
FR2209038B1 (en) * 1972-12-06 1977-07-22 Petroles Cie Francaise
AT380534B (en) * 1983-01-07 1986-06-10 Ver Edelstahlwerke Ag TURNING, TURNING, OR STRIKE
FR2634818B1 (en) * 1988-07-28 1992-11-06 Cogema DRILLING METHOD AND DEVICE FOR THE STUDY AND EXPLOITATION OF THE BASEMENT
JPH03125785A (en) * 1989-10-06 1991-05-29 Yoshida Tekkosho:Kk Surface soil excavation work by double-header drill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19857479C1 (en) * 1998-12-14 2000-08-03 Guenter Klemm Impact absorbing mechanism for deep hole hammer drill, has air hole provided for connecting cylinder chamber and channel, which is closed by piston on exertion of axial force
EP1124037A1 (en) 2000-02-08 2001-08-16 Günter Prof. Dr.-Ing. Klemm Drilling device

Also Published As

Publication number Publication date
DE59207133D1 (en) 1996-10-17
ES2094372T3 (en) 1997-01-16
CA2100085A1 (en) 1993-05-09
FI933117A (en) 1993-08-16
ATE142742T1 (en) 1996-09-15
FI933117A0 (en) 1993-07-07
CH683860A5 (en) 1994-05-31
DE4142733C2 (en) 1993-11-18
AU650581B2 (en) 1994-06-23
NO305137B1 (en) 1999-04-06
HK214496A (en) 1996-12-13
NO932480D0 (en) 1993-07-07
JP3444598B2 (en) 2003-09-08
AU2763092A (en) 1993-06-07
NO932480L (en) 1993-07-07
FI100419B (en) 1997-11-28
EP0565662A1 (en) 1993-10-20
JPH06503623A (en) 1994-04-21
US5355966A (en) 1994-10-18
CA2100085C (en) 1997-03-18
DE4142733A1 (en) 1993-05-13
DK0565662T3 (en) 1997-02-24
WO1993009328A1 (en) 1993-05-13
GR3021600T3 (en) 1997-02-28

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