EP1354119B1 - Method for rock-chiselling - Google Patents
Method for rock-chiselling Download PDFInfo
- Publication number
- EP1354119B1 EP1354119B1 EP02708283A EP02708283A EP1354119B1 EP 1354119 B1 EP1354119 B1 EP 1354119B1 EP 02708283 A EP02708283 A EP 02708283A EP 02708283 A EP02708283 A EP 02708283A EP 1354119 B1 EP1354119 B1 EP 1354119B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drill head
- drilling
- angle
- workface
- rock
- 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
- 238000000034 method Methods 0.000 title claims description 18
- 238000005553 drilling Methods 0.000 claims description 33
- 239000011435 rock Substances 0.000 claims description 21
- 238000009527 percussion Methods 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims 2
- 241000581613 Alchemilla arvensis Species 0.000 claims 1
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 230000003116 impacting effect Effects 0.000 claims 1
- 238000005520 cutting process Methods 0.000 description 5
- 238000010009 beating Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- LLJRXVHJOJRCSM-UHFFFAOYSA-N 3-pyridin-4-yl-1H-indole Chemical compound C=1NC2=CC=CC=C2C=1C1=CC=NC=C1 LLJRXVHJOJRCSM-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
- E21B1/12—Percussion drilling with a reciprocating impulse member
Definitions
- the invention relates to a method for the chiseling of rock or rock, in particular for producing a rock hole for light to medium rock formations and takes priority of the German patent application 101 01 708.1, to which reference is made.
- Drilling with MUD engines is technically complex and expensive, so that compared to the drilling in loose rock formations, which is possible without the use of MUD engines, a cost factor of 5 to 10 is given.
- controllable, asymmetric hard rock drilling heads developed by FlowTex were used with so-called double wedge drill rods.
- the height-asymmetrical wing blades of the drilling heads used were moved in the control so that the longer front edge works into the rock by short left / right pivotal movements in the desired direction.
- the drill hole diameter is then machined out by pre-cutters and post-clearers by rotating the entire drill head.
- the pre-cutter represents the longer front cutting edge and the post-scraper the shorter front cutting edge.
- a drill bit with an asymmetrical bit tip is known from WO 99/1956.
- This method is also associated with a high cost, since the required Doppelkeilbohrgestfite are expensive.
- the drilling device has a poor efficiency, so that only a short drilling distances can be realized with a high expenditure of time.
- the pre-cutting to change direction is expensive and the wear of the pre-cutter high.
- a Vorschneider Touch is required after each drilling operation.
- the invention is based on the object to provide a method for rock or rock drilling, with a cost and efficient rock or rock drilling is possible.
- the inventive method is based on the idea, with the aid of an asymmetric rock drilling head with preferably integrated asymmetrically arranged jet nozzles and a beating and rotating drivable drilling device to use a combination of turning and hitting such that - preferably high-frequency - impact pulses Rock pieces of a certain circular section of the working face are broken and after a certain - preferably short - time or some - preferably small - penetration depth of the asymmetric drill head, a rotation of the asymmetric drill head by a certain angle to move the drill head in a new circle section of the working face and then use the impact pulses to break pieces of rock out of the new angle range.
- the asymmetry may also be realized by a particular (eg geometric) nozzle arrangement or beam alignment without the tool as such being asymmetric.
- This procedure makes it possible to realize with a simple linkage drilling device and an additional percussion drive a surprisingly rapid Bohrvortrieb in rock or rock with a simple asymmetric drill head and thereby by varying the Bohrparameter, such as the residence time in a certain angle section, and thus uneven distribution of propulsive force on the working face a directional drilling to realize.
- the device according to the invention makes it possible to avoid a wedging effect and the associated undesired distribution of the introduction of force away from the tip of the drill head.
- the tip of the drill head may be movable, so that the entire impact pulse is introduced into the drill head tip, without energy is consumed to accelerate the remaining drill head.
- the beater unit is operated at a high beating frequency, more preferably at more than 1000 beats / min.
- a variable thrust is brought via a linkage to the drill head.
- the steps of beating and turning can be done in a timed change.
- the angle ⁇ may be 0 ° or 360 ° for steering, while otherwise preferably between> 0 ° and 90 °.
- asymmetric drilling heads For use according to the method of the invention asymmetric drilling heads have proven to be particularly advantageous.
- drilling media for cooling or cutting or discharging the cuttings can be arranged via nozzles arranged asymmetrically in the drill bit or bit.
- the drilling device 1 has a beating unit 2, an asymmetrical boring head 4 and a connection for a linkage 6. Both a torque and a variable axial pressure can be transmitted to the drilling device 1 via the linkage 6.
- the drilling device 1 When drilling (as shown in Fig. 1), the drilling device 1 is located with the drill head 4 in the working face 8.
- the chisel tip 10 of the drill head 4 is movably mounted, so that the full impact pulse of the impact unit 2 is transmitted to the chisel tip.
- a channel 12 for a drilling medium In the front region of the chisel tip 10 exits a channel 12 for a drilling medium.
- the axis of the bit tip 10 has an angle ⁇ with respect to the axis of the drill.
- the impact unit 2 By operation of the impact unit 2, a region of the rock is broken out of the working face 8 with the chisel tip 10 (FIG. 1). In this case, a variable thrust is exerted on the drilling device via the linkage 6.
- the drilling device and thus the drill head is rotated by an angle ⁇ in order to knock out in this position in a new area of the working face 8 a piece of rock from the working face with the aid of the percussion drive 2.
- the angle is 0 ° or 360 °, with the latter a particularly good propulsion is achieved.
Landscapes
- 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)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Aufmeißeln von Gestein oder Fels, insbesondere zum Erzeugen einer Felsbohrung für leichte bis mittelere Felsformationen und nimmt die Priorität der deutschen Patentanmeldung 101 01 708.1 in Anspruch, auf die inhaltlich Bezug genommen wird.The invention relates to a method for the chiseling of rock or rock, in particular for producing a rock hole for light to medium rock formations and takes priority of the German patent application 101 01 708.1, to which reference is made.
Beim Bohren in leichteren bis mittleren Felsformationen werden üblicherweise sog. "MUD-Motoren" eingesetzt. Dabei handelt es sich um Schraubenmotoren, die nach dem Moineau-Prinzip arbeiten.When drilling in light to medium rock formations usually so-called "MUD engines" are used. These are screw motors that work according to the Moineau principle.
Das Bohren mit MUD-Motoren ist betriebstechnisch aufwendig und teuer, so daß gegenüber dem Bohren in Lockergesteinsformationen, welches ohne den Einsatz von MUD-Motoren möglich ist, ein Kostenfaktor von 5 bis 10 gegeben ist.Drilling with MUD engines is technically complex and expensive, so that compared to the drilling in loose rock formations, which is possible without the use of MUD engines, a cost factor of 5 to 10 is given.
Um den Einsatz der teuren MUD-Motoren zu vermeiden, wurden kleinere Hartgesteinsbohrköpfe aus dem Bergbau und der Ankertechnik eingesetzt, die jedoch keinen gesteuerten Vortrieb erlauben.In order to avoid the use of expensive MUD engines, smaller hard rock drill heads from the mining and the anchor technology were used, but do not allow controlled propulsion.
Daneben wurden von der Fa. FlowTex entwickelte steuerbare, asymmetrische Hartgesteinsbohrköpfe mit sog. Doppelkeilbohrgestänge eingesetzt. Die höhenasymmetrischen Flügelschneiden der dabei verwendeten Bohrköpfe wurden beim Steuern so bewegt, daß die längere Frontschneide sich durch kurze Links/Rechts-Schwenkbewegungen in der gewünschten Richtung in den Fels hineinarbeitet. Nach entsprechender Vorbohrtiefe wird dann durch Rotation des gesamten Bohrkopfes der Bohrtochdurchmesser durch Vorschneider und Nachräumer herausgearbeitet. Der Vorschneider stellt dabei die längere Frontschneide und der Nachräumer die kürzere Frontschneide dar.In addition, controllable, asymmetric hard rock drilling heads developed by FlowTex were used with so-called double wedge drill rods. The height-asymmetrical wing blades of the drilling heads used were moved in the control so that the longer front edge works into the rock by short left / right pivotal movements in the desired direction. After a suitable pre-drilling depth, the drill hole diameter is then machined out by pre-cutters and post-clearers by rotating the entire drill head. The pre-cutter represents the longer front cutting edge and the post-scraper the shorter front cutting edge.
Ein Bohrkopf mit einer asymmetrischen Meißelspitze ist aus der Patentschrift WO 99/1956 bekannt.A drill bit with an asymmetrical bit tip is known from WO 99/1956.
Auch dieses Verfahren ist mit einem hohen Kostenaufwand verbunden, da die erforderlichen Doppelkeilbohrgestänge teuer sind. Zudem weist die Bohrvorrichtung einen schlechten Wirkungsgrad auf, so daß mit hohem Zeitaufwand nur kurze Bohrstrecken realisierbar sind. Dabei ist das Vorschneiden zur Richtungsänderung aufwendig und der Verschleiß des Vorschneiders hoch. In der Praxis ist ein Vorschneiderwechsel nach jedem Bohrvorgang erforderlich.This method is also associated with a high cost, since the required Doppelkeilbohrgestänge are expensive. In addition, the drilling device has a poor efficiency, so that only a short drilling distances can be realized with a high expenditure of time. Here, the pre-cutting to change direction is expensive and the wear of the pre-cutter high. In practice, a Vorschneiderwechsel is required after each drilling operation.
Der Erfindung liegt nun die Aufgabe zugrunde, ein Verfahren zum Gesteins- oder Felsbohren zu schaffen, mit dem ein kostengünstiges und leistungsfähiges Gesteins- oder Felsbohren möglich ist.The invention is based on the object to provide a method for rock or rock drilling, with a cost and efficient rock or rock drilling is possible.
Ferner ist es Aufgabe der Erfindung, eine für das Verfahren geeignete Vorrichtung zur Verfügung zu stellen.It is a further object of the invention to provide a device suitable for the method.
Die Erfindung wird gelöst durch den Gegenstand der unabhängigen Patentansprüche. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.The invention is solved by the subject matter of the independent claims. Advantageous developments are the subject of the dependent claims.
Das erfindungsgemäße Verfahren basiert auf dem Gedanken, unter Zuhilfenahme eines asymmetrischen Felsbohrkopfes mit vorzugsweise integrierten asymmetrisch angeordneten Strahldüsen und einer schlagend und drehend vortreibbaren Bohrvorrichtung eine Kombination von Drehen und Schlagen derart einzusetzen, daß durch - vorzugsweise hochfrequente - Schlagimpulse Gesteinsstücke eines bestimmten Kreisabschnitts der Ortsbrust herausgebrochen werden und nach einem gewissen - vorzugsweise kurzen - Zeitabschnitt oder einer gewissen - vorzugsweise geringen - Eindringtiefe des asymmetrischen Bohrkopfs eine Rotation des asymmetrischen Bohrkopfs um einen bestimmten Winkel erfolgt, um den Bohrkopf in einen neuen Kreisabschnitt der Ortsbrust zu bewegen und dann mit Hilfe der Schlagimpulse Gesteinsstücke aus dem neuen Winkelbereich herauszubrechen. Die Asymmetrie kann auch durch eine bestimmte (z.B. geometrische) Düsenanordnung oder Strahlausrichtung verwirklicht sein, ohne daß das Werkzeug als solches asymmetrisch ist.The inventive method is based on the idea, with the aid of an asymmetric rock drilling head with preferably integrated asymmetrically arranged jet nozzles and a beating and rotating drivable drilling device to use a combination of turning and hitting such that - preferably high-frequency - impact pulses Rock pieces of a certain circular section of the working face are broken and after a certain - preferably short - time or some - preferably small - penetration depth of the asymmetric drill head, a rotation of the asymmetric drill head by a certain angle to move the drill head in a new circle section of the working face and then use the impact pulses to break pieces of rock out of the new angle range. The asymmetry may also be realized by a particular (eg geometric) nozzle arrangement or beam alignment without the tool as such being asymmetric.
Diese Verfahrensweise erlaubt es, mit einer einfachen Gestängebohrvorrichtung und einem zusätzlichen Schlagantrieb einen überraschend zügigen Bohrvortrieb in Fels oder Gestein mit einem einfachen asymmetrischen Bohrkopf zu verwirklichen und dabei durch Variation der Bohrparameter, wie beispielsweise die Verweilzeit in einem bestimmten Winkelabschnitt, und damit ungleichmäßiger Verteilung der Vortriebskraft auf die Ortsbrust ein Richtungsbohren zu verwirklichen.This procedure makes it possible to realize with a simple linkage drilling device and an additional percussion drive a surprisingly rapid Bohrvortrieb in rock or rock with a simple asymmetric drill head and thereby by varying the Bohrparameter, such as the residence time in a certain angle section, and thus uneven distribution of propulsive force on the working face a directional drilling to realize.
Die erfindungsgemäße Vorrichtung ermöglicht es, einen Verkeilungseffekt und die damit verbundene ungewünschte Verteilung der Krafteinleitung von der Spitze des Bohrkopfes weg zu vermeiden. Um die Schlagkraft weiter zu erhöhen, kann die Spitze des Bohrkopfes beweglich ausgebildet sein, so daß der gesamte Schlagimpuls in die Bohrkopfspitze eingeleitet wird, ohne daß Energie zur Beschleunigung des restlichen Bohrkopfes verbraucht wird.The device according to the invention makes it possible to avoid a wedging effect and the associated undesired distribution of the introduction of force away from the tip of the drill head. In order to further increase the impact force, the tip of the drill head may be movable, so that the entire impact pulse is introduced into the drill head tip, without energy is consumed to accelerate the remaining drill head.
Vorzugsweise wird die Schlageinheit mit hoher Schlagfrequenz - besonders bevorzugt mit mehr als 1000 Schlägen/min - betrieben.Preferably, the beater unit is operated at a high beating frequency, more preferably at more than 1000 beats / min.
Bevorzugt wird eine variable Schubkraft über ein Gestänge auf den Bohrkopf gebracht.Preferably, a variable thrust is brought via a linkage to the drill head.
Die Schritte des Schlagens und des Drehens können in einem getakteten Wechsel erfolgen. Der Winkel β kann zum Lenken 0° oder 360° betragen, während er ansonsten bevorzugt zwischen >0° und 90° beträgt.The steps of beating and turning can be done in a timed change. The angle β may be 0 ° or 360 ° for steering, while otherwise preferably between> 0 ° and 90 °.
Für den Einsatz nach dem erfindungsgemäßen Verfahren haben sich asymmetrische Bohrköpfe als besonders vorteilhaft erwiesen.For use according to the method of the invention asymmetric drilling heads have proven to be particularly advantageous.
Um den Vortrieb weiter zu forcieren, können über im Bohrkopf bzw. Meißel asymmetrisch angeordnete Düsen Bohrmedien zum Kühlen bzw. Schneiden oder Austragen des Bohrkleins angeordnet sein.In order to further promote propulsion, drilling media for cooling or cutting or discharging the cuttings can be arranged via nozzles arranged asymmetrically in the drill bit or bit.
Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels des näheren erläutert.In the following the invention will be explained with reference to an embodiment shown in the drawing of the closer.
In der Zeichnung zeigen:
- Fig. 1
- eine Darstellung der Ortsbrust mit darin liegendem Bohrkopf in drei Bohrschritten und
- Fig. 2
- eine Detailansicht des Bohrkopfes der Fig. 1.
- Fig. 1
- a representation of the working face with it lying drill head in three drilling steps and
- Fig. 2
- a detailed view of the drill head of FIG. 1.
Die Bohrvorrichtung 1 weist eine Schlageinheit 2, einen asymmetrischen Bohrkopf 4 und einen Anschluß für ein Gestänge 6 auf. Über das Gestänge 6 kann sowohl ein Drehmoment als auch ein variabler Axialdruck auf die Bohrvorrichtung 1 übertragen werden. Beim Bohren (wie in Fig. 1 dargestellt) befindet sich die Bohrvorrichtung 1 mit dem Bohrkopf 4 in der Ortsbrust 8. Die Meißelspitze 10 des Bohrkopfes 4 ist beweglich gelagert, so daß der vollständige Schlagimpuls der Schlageinheit 2 auf die Meißelspitze übertragen wird.The drilling device 1 has a beating
Im vorderen Bereich der Meißelspitze 10 tritt ein Kanal 12 für ein Bohrmedium aus. Die Achse der Meißelspitze 10 weist einen Winkel α in Bezug auf die Achse des Bohrgeräts auf.In the front region of the
Durch Betrieb der Schlageinheit 2 wird mit der Meißelspitze 10 ein Bereich des Gesteins aus der Ortsbrust 8 herausgebrochen (Fig. 1). Dabei wird über das Gestänge 6 eine variable Schubkraft auf die Bohrvorrichtung ausgeübt. In einem nächsten Schritt wird die Bohrvorrichtung und damit der Bohrkopf um einen Winkel β gedreht, um in dieser Position in einem neuen Bereich der Ortsbrust 8 ein Gesteinsstück aus der Ortsbrust mit Hilfe des Schlagantriebs 2 herauszuschlagen. Zum Lenken beträgt der Winkel 0° oder 360°, wobei mit letzterem ein besonders guter Vortrieb erreicht wird.By operation of the
Claims (15)
- Method for opening stone or rock with a chisel, in particular for producing a drill hole in rock with a drilling device having a percussion drive, rod assembly, characterised in that the percussion unit (2) exerts one or more percussive pulses on the workface via the drill head (4) in a circular area portion of the workface (8) in order to break stone out of the workface and, in a next step, the drill head (4) is rotated through an angle β and, in the corresponding new circular area portion of the workface (8), again by means of percussive pulses via the drill head (4) and the chisel point (10), pieces of stone are broken out of the workface (8).
- Method according to Claim 1, characterised in that the drill head (4) is moved back counter to the forward drive direction in order to reach the new circular area portion.
- Method according to either Claim 1 or Claim 2, characterised in that the percussion unit (2) is operated at high frequency, preferably at a frequency of more than 1,000 impacts/min.
- Method according to any one of the preceding claims, characterised in that a contact pressure is exerted on the drilling device, and therefore on the drill head (4), via the rod assembly (6).
- Method according to Claim 4, characterised in that the contact pressure is variable.
- Method according to any one of the preceding claims, characterised in that the steps of impacting and of rotation are carried out with a cyclic change.
- Method according to any one of the preceding claims, characterised in that the angle β is > from 0° to 90°.
- Method according to any one of Claims 1 to 6, characterised in that the drill head is rotated via the rod assembly (6).
- Method according to Claim 1, characterised in that the variation of drilling parameters, such as angle and/or contact pressure and/or cycle duration, is used in order to achieve a specific drilling direction.
- Use of a drilling device having a drill head (4) with an asymmetric geometry in a method according to one or more of the preceding claims.
- Use according to Claim 10, characterised in that the drill head (4) has a movable chisel point (10).
- Use according to either Claim 10 or Claim 11, characterised in that the movable chisel point (10) exerts a percussive pulse on the workface in the steering direction.
- Use according to one or more of the preceding claims, characterised in that the chisel point (10) has an axis at an angle α in relation to the drilling unit, the angle α being = from 0° to 20°.
- Use according to at least one of Claims 8 to 12, characterised in that the drill head has an asymmetric nozzle arrangement.
- Drilling device having a drill head (4) which has a chisel point (10) which is arranged to be movable inside the drill head, characterised in that the longitudinal axis of the chisel point (10) is arranged at an angle α > from 0° to 20° in relation to the longitudinal axis of the drilling device.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10101708 | 2001-01-15 | ||
| DE10101708A DE10101708B4 (en) | 2001-01-15 | 2001-01-15 | Method of rock cutting |
| PCT/EP2002/000305 WO2002055830A2 (en) | 2001-01-15 | 2002-01-14 | Method for rock-chiseling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1354119A2 EP1354119A2 (en) | 2003-10-22 |
| EP1354119B1 true EP1354119B1 (en) | 2006-10-25 |
Family
ID=7670689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02708283A Expired - Lifetime EP1354119B1 (en) | 2001-01-15 | 2002-01-14 | Method for rock-chiselling |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20040099442A1 (en) |
| EP (1) | EP1354119B1 (en) |
| DE (2) | DE10101708B4 (en) |
| WO (1) | WO2002055830A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9175517B2 (en) | 2012-02-10 | 2015-11-03 | Top Mark Mechanical Equipment Limited | Method and apparatus for controlling the operation of cluster drill of down-the-hole hammers |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4867255A (en) * | 1988-05-20 | 1989-09-19 | Flowmole Corporation | Technique for steering a downhole hammer |
| DE3910515A1 (en) * | 1989-04-01 | 1990-10-04 | Tracto Technik | SELF-DRIVABLE RAMM DRILLING DEVICE, ESPECIALLY FOR THE PRODUCTION OF TUBULAR EARTH HOLES |
| DE9401528U1 (en) * | 1994-01-26 | 1994-05-19 | Gartec Geo- Und Umwelttechnik Gmbh, 03253 Doberlug-Kirchhain | Drill bits for the production of pilot holes for drillings and the like. |
| DE4433533C1 (en) * | 1994-09-20 | 1995-11-23 | Terra Ag Tiefbautechnik | Hydraulic ram=type drill |
| DE19534850A1 (en) * | 1995-09-20 | 1997-03-27 | Hilti Ag | Impact-supported hand drill |
| EP0885343B1 (en) * | 1996-03-04 | 2001-02-21 | Vermeer Manufacturing Company | Directional boring |
| DE19612902C2 (en) * | 1996-03-30 | 2000-05-11 | Tracto Technik | Direction drilling method and apparatus for performing the method |
| DE19618298A1 (en) * | 1996-05-07 | 1997-11-13 | Geisert Engineering Gmbh | Drilling device for impact drilling |
| US5950743A (en) * | 1997-02-05 | 1999-09-14 | Cox; David M. | Method for horizontal directional drilling of rock formations |
| CA2306944A1 (en) * | 1997-10-15 | 1999-04-22 | Giuseppe Esposito | Directional drilling tool |
| US6397056B1 (en) * | 1999-04-30 | 2002-05-28 | Telefonaktiebolaget L M Ericsson (Publ) | System and method for reducing network signaling load in a radio telecommunications network |
-
2001
- 2001-01-15 DE DE10101708A patent/DE10101708B4/en not_active Expired - Fee Related
-
2002
- 2002-01-14 US US10/466,225 patent/US20040099442A1/en not_active Abandoned
- 2002-01-14 DE DE50208535T patent/DE50208535D1/en not_active Expired - Lifetime
- 2002-01-14 WO PCT/EP2002/000305 patent/WO2002055830A2/en not_active Ceased
- 2002-01-14 EP EP02708283A patent/EP1354119B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9175517B2 (en) | 2012-02-10 | 2015-11-03 | Top Mark Mechanical Equipment Limited | Method and apparatus for controlling the operation of cluster drill of down-the-hole hammers |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10101708A1 (en) | 2002-07-25 |
| DE10101708B4 (en) | 2006-02-09 |
| EP1354119A2 (en) | 2003-10-22 |
| US20040099442A1 (en) | 2004-05-27 |
| WO2002055830A2 (en) | 2002-07-18 |
| DE50208535D1 (en) | 2006-12-07 |
| WO2002055830A3 (en) | 2002-09-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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