EP1731708B1 - Appareil de forage à marteau à percussion et procédé associé - Google Patents

Appareil de forage à marteau à percussion et procédé associé Download PDF

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Publication number
EP1731708B1
EP1731708B1 EP05012538A EP05012538A EP1731708B1 EP 1731708 B1 EP1731708 B1 EP 1731708B1 EP 05012538 A EP05012538 A EP 05012538A EP 05012538 A EP05012538 A EP 05012538A EP 1731708 B1 EP1731708 B1 EP 1731708B1
Authority
EP
European Patent Office
Prior art keywords
hammer
drilling
dth
cuttings
drilling device
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.)
Active
Application number
EP05012538A
Other languages
German (de)
English (en)
Other versions
EP1731708A1 (fr
Inventor
Johannes Abt
Frank Fleischmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Geomechanik Wasser- und Umwelttechnik GmbH
Original Assignee
Geomechanik Wasser- und Umwelttechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE502005001190T priority Critical patent/DE502005001190D1/de
Application filed by Geomechanik Wasser- und Umwelttechnik GmbH filed Critical Geomechanik Wasser- und Umwelttechnik GmbH
Priority to AT05012538T priority patent/ATE369481T1/de
Priority to EP05012538A priority patent/EP1731708B1/fr
Priority to ZA200800106A priority patent/ZA200800106B/xx
Priority to CNA2006800204977A priority patent/CN101203656A/zh
Priority to US11/921,904 priority patent/US20090101413A1/en
Priority to EP06743121A priority patent/EP1907663B1/fr
Priority to EA200800001A priority patent/EA014437B1/ru
Priority to AU2006256971A priority patent/AU2006256971A1/en
Priority to AP2007004293A priority patent/AP2007004293A0/xx
Priority to CA002654785A priority patent/CA2654785A1/fr
Priority to PCT/EP2006/005427 priority patent/WO2006131339A1/fr
Publication of EP1731708A1 publication Critical patent/EP1731708A1/fr
Application granted granted Critical
Publication of EP1731708B1 publication Critical patent/EP1731708B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
    • 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
    • E21B10/36—Percussion drill bits
    • E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes

Definitions

  • the present invention relates to a device for drilling, in particular by means of a countersunk hammer, and a drilling method, in particular for overlay drilling.
  • Drilling devices referred to as countersink drills have a rotary percussion drill head which is lowered into the wellbore.
  • Other designations include "in-hole hammer” and “DTH hammer” ( down-the-hole hammer ).
  • overlay drilling is understood to mean a drilling method in which a pipe lining the borehole, at least in the region of the bottom hole, is carried along.
  • German Offenlegungsschrift DE 43 10 726 A1 is a drill pipe with countersinking drill head described in which by means of an air distributor compressed air as flushing medium from the outside inwards to a central part of the crown of the drill, and the drill cuttings is conveyed through a centrally located in the drill string passageway.
  • This known device also has in the area of the hammer on a downwardly open skirt through which the enriched with cuttings compressed air is fed into the air manifold.
  • the drilling apparatus comprises a countersinking drill head with a percussion drill bit, a drill pipe with a conveying channel for the drill cuttings and at least one irrigation medium supply channel, irrigation medium supply, and a gasket for sealing the drill tube against the wellbore opening, wherein the gasket is disposed at a constant distance from the hammer during drilling.
  • the invention provides a overburden drilling apparatus having a percussive hammer bit with a percussion drill bit, a drill pipe having a drill channel for the cuttings, and at least one irrigation medium supply channel, a purge medium supply, and an overlay tube.
  • a ring is preferably mounted above an air distributor around the drill pipe, preferably against that on which at least one, preferably a plurality of disks are arranged as a seal.
  • Preference for this purpose by smaller plastic discs spaced-apart rubber discs whose outer diameter corresponds to the inner diameter of a superposition tube.
  • the stack of rubber and plastic discs is preferably held together by two smaller diameter steel discs bolted together.
  • the sealing arrangement of the discs and a ring carrying the discs is preferably fixed by a lock ring and / or a flange.
  • the invention provides a method of overburden drilling in the air lifting method.
  • the drilling method according to the invention comprises supplying the flushing fluid in particular peripherally for discharging the cuttings at least over a predominant part of the drilling depth, and the entrainment of a superimposed pipe arranged adjacent to the pending rock. It is preferred if the overlay tube does not rotate relative to the upcoming rock or slower than a centrally located drill pipe for the supply and removal of the flushing fluid.
  • the drilling method according to the invention further comprises the sealing of the drilling sole against the hole opening, and in particular the entrainment of the seal.
  • the seal rotates relative to the pending rock at a rate of at most that of the drill pipe, and preferably at least that of the overlay pipe.
  • a spin percussion method comprises supplying energy by means of an energy transfer medium to a downhole hammer while rotating the hammer.
  • the drill pipe 1 comprises a drill pipe 2 with a central delivery channel 3 and an air channel 4 arranged at its periphery.
  • a connecting piece 5 is welded into which a countersunk hammer drill head 6 from below is screwed with its central connector 7, which has a compressed air supply opening 8, through which the Senkhammer drill head 6 is supplied to drive his percussion drill bit 9 with compressed air.
  • the diameter of the percussion drill bit 9 is greater than that of the drill pipe 2 and also larger than the diameter of the drill bit
  • a conveying channel section 10 extends from the centrally arranged conveying channel 3 of the drill pipe 2 obliquely downward to a lateral inlet opening 11.
  • an air duct section 13 extends from the peripheral air duct 4 of the drill pipe to a central region of the connecting piece 7th of the drill head.
  • the percussion drill bit 9 is driven to blow by compressed air from a compressor unit located adjacent the well bore in the example, while it is rotated by the drill string 1.
  • the percussion drill bit has a central pilot crown 9a and a ring crown 9b surrounding it. Pilot crown 9a and ring crown 9b are detachably connected to each other by means of a bayonet connection.
  • the ring crown 9b is rotatably connected via a Casingschuh 15 with a superposition tube 12, which is thereby pulled along in the course of drilling.
  • the compressed air flowing back from the borehole bottom to the borehole opening acts as flushing medium, assisted by water present in the borehole or additionally supplied, and holds in the central conveying channel 3 a flow velocity of more than 30 m / s, preferably 70-80 m / s, sufficient to convey the cuttings , in particular about 75 m / s upright.
  • the drill bit 9 further has a feed channel 41 for the compressed air 42 flowing from the hammer 6 into the drill bit 9, a feed passage 43, a discharge passage 44, a bypass 45 and a discharge passage 46 for the return compressed air 47.
  • Drilling elements 50a, 50b of the pilot or annular crown are arranged on the end face of the crown 9.
  • the ring crown 9b is by means of the holding elements 51, 52, 53 on the one hand releasably coupled to the pilot crown 9a, on the other hand rotatably connected to the Casingschuh 15, so that the ring crown 9b is able to entrain the Casingschuh 15 together with the superimposed pipe 12 welded thereto.
  • the overlay tube 12 thereby does not rotate or substantially slower than the drill bit 9, depending on the frictional resistance of the borehole wall and on the crown exerted torque.
  • Imlochhammer and a drill pipe with 200 mm outer and 125 mm inner diameter serve compressors 60 with 30 to 80 m 3 / min flow rate, preferably 50 to 70 m 3 / min capacity, with Increasing depth and grain size of the cuttings corresponding to larger air flow rates are used.
  • the borehole is lined, at least in the region of its sole, beyond the hammer 6, with the overlay tube 12.
  • a seal Plugg 18 is set ( Figure 3), which rests tightly on the overlay tube 12 and the drill pipe 2 and in the course of drilling with the drill pipe 2 moves down.
  • This Plugg 18 includes in the illustrated embodiment, three rubber discs 20 which are supported by two plastic discs 22 of smaller diameter spaced from each other. Preference is given to one or two to five rubber discs, which are separated from one another by a correspondingly smaller by one number of plastic discs.
  • the stack of rubber and plastic discs is held on both sides by steel discs 24 of the same diameter as the plastic discs 22, and six threaded through holes 26 in the discs threaded bolt 28 together with nuts.
  • the disk stack is arranged and fixed by means of bolts 32 on a mounting ring 30 which is rotatably pushed onto the drill pipe 2 and fixed in the axial direction by a lock ring 34 welded to the drill pipe 2.
  • the mounting ring 30 rotates not or only slowly with the drill pipe 2, while the rubber discs 20 abut against the inner wall of the overlay tube 12.
  • the sealing discs of the Plugg 18 rotate at a speed at least that of the overlay tube 12 and smaller than that of the drill pipe 2.
  • an inflatable tube ring (“packer”) is arranged on the mounting ring instead of the disc stack.
  • a 711 (28 ") x8 mm tube with an inside diameter of 695 mm is fitted with the Plugg rubber discs 20.
  • the rubber, steel and plastic discs of the Plugg 18 each have a thickness of 15 mm.
  • these disks are attached to a bronze ring 30, which in turn is rotatably pushed onto the drill pipe 2 with an outer diameter of 200 mm and secured in the axial direction by a lock ring 34.
  • a drill collar 36 (see Figure 4) is arranged to dampen the impact of the hammer 6 upwards and so to lead down.
  • This drill collar 36 is, for example, as part of the drill pipe 2 with an outer, with lead poured coat educated.
  • the plug 18 is disposed above or preferably below the drill collar 36.
  • the overlay pipe is a continuous pipe string, which is continuously supplemented in the course of drilling and can remain in the hole after completion of the hole.
  • the strand is not supplemented over the Plugg out, but completed with an example, frustoconical lid piece upwards.
  • the cover piece is designed as a seal, so that the plug is dispensable. The lid piece closes against the drill pipe rotatable tight.
  • a downwardly closed jacket tube 14 which is preferably double-walled, is arranged below the lateral inlet opening 11 around the hammer 6. Towards the top, this jacket tube 14 extends in this example to the upper edge of the connecting piece 5, wherein for the lateral inlet opening 11, a passage 15 is formed in the jacket tube 14.
  • the flushing medium is forced to flow through the jacket tube 14 narrowed circumferential space (outer hatched area in Figure 2) between the jacket tube 14 and overlay tube 12. Because of the restricted free cross-section, the flow velocity at the hammer level increases to values that ensure purging of the cuttings.
  • the drill bit 9 is rotated while passing through the drill pipe 2 for transmitting a hammering action to the rotary drill bit 9 to the hammer 6, an energy transfer medium, for example a portion of the purge medium, is supplied; with the drill bit 9 an overlay tube 12 and a seal 18 between the overlay tube 12 and the drill pipe 2 is carried along; and the cuttings are discharged through the drill pipe 2.
  • the overlay tube may be continuously added to the wellbore orifice at its top end, or terminated at the top after the seal is installed. In the former case, the overlay tube can remain in the well after completion of the hole or be removed again.
  • the embodiment in the latter case has the advantage that the frictional resistance of the entrained overlay tube remains independent of the drilling depth, and thus in this respect sets no significant limit.
  • the drilling methods according to the invention have the advantage that by entraining the plug 18 close above the air distributor connection piece 5 for the deflection of the flushing medium, and by carrying an overlay tube 12, reliably a sufficient pressure gradient between the borehole bottom and well opening is established to blow out the cuttings On the one hand, the flushing medium can not escape into fractures of the upcoming mountains, on the other hand, the volume to be pressurized remains constant and comparatively low in the course of drilling.
  • the passage cross-section for the cuttings-enriched flushing fluid in the region of the hammer is restricted, if necessary by a jacket tube surrounding the hammer, such that it is at most ten times the internal cross-section of the conveying channel of the drill pipe (internal hatched area in Figure 2), on the other hand, preferably not less than that, in particular at least four times as large, and more preferably six to eight times as large, so that even coarse cuttings can pass.
  • overlay pipe drill pipe delivery channel and optional jacket tube circular cylindrical.
  • the optional jacket tube is preferably single-walled or double-walled and has a passage or a recess which connects the inlet opening of the air distributor with the space surrounding the jacket tube. Furthermore, the jacket tube closes at its upper end against the drill pipe or the air distributor, at its lower end against the hammer.
  • the drilling process is performed in a first section, at a relatively large diameter borehole, using such a jacket tube; after reaching a certain hole depth, a second drill section with a smaller hole diameter and without the jacket tube, or with a jacket tube smaller outer diameter is continued.
  • a barrier piping In the upper, further well section can then be installed, for example, a barrier piping. In this way, the entire bore with largely the same components and thus space-saving and cost-effective.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Claims (20)

  1. Dispositif de forage à marteau fond de trou, comportant :
    - une tête de forage (6) à marteau fond de trou, munie d'une couronne de forage à percussion (9) ;
    - un dispositif d'acheminement du fluide de lavage (60) ; et
    - un tube de forage (2) avec un conduit de transport (3) pour les déblais de forage et au moins un conduit d'admission (4) pour le fluide de lavage,
    caractérisé par
    - un tube de protection (14) disposé autour du marteau (6) et fermé vers le bas.
  2. Dispositif de forage à marteau fond de trou selon la revendication 1, comportant en outre un système d'étanchéité (18) pour étancher le trou de forage par rapport à l'ouverture du trou de forage.
  3. Dispositif de forage à marteau fond de trou selon la revendication 2, dans lequel le système d'étanchéité (18), destiné à étancher le trou de forage par rapport à l'ouverture du trou de forage, est agencé à une distance définie de la tête de forage (6).
  4. Dispositif de forage à marteau fond de trou selon l'une quelconque des revendications 1 à 3, dans lequel le tube de protection (14) est réalisé à double paroi.
  5. Dispositif de forage à marteau fond de trou selon l'une quelconque des revendications 1 à 4, comportant en outre un tube de recouvrement (12) assemblé à la couronne de forage (9) de manière à tourner dans le sens opposé à celle-ci.
  6. Dispositif de forage à marteau fond de trou selon la revendication 5, dans lequel une surface de section libre à l'intérieur du tube de recouvrement (12) dans la zone du marteau fond de trou (6) est au moins aussi grande, de préférence au moins quatre fois plus grande, en particulier six à huit fois plus grande que la surface de section libre du conduit de transport (3) pour les déblais de forage.
  7. Dispositif de forage à marteau fond de trou selon la revendication 5 ou 6, dans lequel le tube de recouvrement (12) et le tube de protection (14) ont une forme cylindrique circulaire.
  8. Dispositif de forage à marteau fond de trou selon la revendication 7, dans lequel le diamètre extérieur A du tube de protection (14), le diamètre intérieur n B, multiple de n, du conduit de transport (3) pour les déblais de forage et le diamètre intérieur C du tube de recouvrement (12) satisfont à la condition qu'un triangle avec les côtés A, n B et C est à angle droit ou à angle aigu, sachant que 1,5 < n < 4, de préférence 2,5 < n < 3.
  9. Dispositif de forage à marteau fond de trou selon l'une quelconque des revendications précédentes, dans lequel le conduit de transport (3) pour les déblais de forage est entouré par le conduit d'admission (4) pour le fluide de lavage.
  10. Dispositif de forage à marteau fond de trou selon l'une quelconque des revendications précédentes, dans lequel le système d'étanchéité (18) comporte au moins un, de préférence deux à cinq, en particulier trois disques en caoutchouc (20) situés à distance les uns des autres.
  11. Dispositif de forage à marteau fond de trou selon la revendication 10, dans lequel deux à cinq, en particulier trois disques en caoutchouc (20) sont écartés respectivement les uns des autres par des disques en matière plastique (22).
  12. Dispositif de forage à marteau fond de trou selon la revendication 11, dans lequel le diamètre des disques en matière plastique (22) est inférieur au diamètre des disques en caoutchouc (20).
  13. Dispositif de forage à marteau fond de trou selon l'une quelconque des revendications 10 à 12, dans lequel les disques (20, 22) sont disposés sur une bague de montage (30), qui est montée rotative autour du tube de forage (2).
  14. Procédé de forage par rotation et percussion, comportant :
    - rotation d'une couronne de forage (9) ; et
    - admission d'un fluide de transmission d'énergie à travers un tube de forage (2) vers un marteau (6) en vue de transmette un effet de percussion sur la couronne de forage (9) rotative ;
    caractérisé par
    - entraînement d'un tube de protection (14), et
    - évacuation des déblais de forage autour du tube de protection (14) et à travers le tube de forage (2).
  15. Procédé de forage selon la revendication 14, comportant en outre une compression de l'air en vue de fournir le fluide de transmission d'énergie.
  16. Procédé de forage selon la revendication 14 ou 15, dans lequel l'évacuation des déblais de forage est effectuée au moins en partie par le fluide de transmission d'énergie après l'application de son effet de percussion.
  17. Procédé de forage selon l'une quelconque des revendications 14 à 16, dans lequel les déblais de forage sont soufflés vers l'extérieur à travers le tube de forage (2) avec une vitesse d'au moins 50 m/s, de préférence supérieure à 60 m/s.
  18. Procédé de forage selon l'une quelconque des revendications 14 à 17, comportant en outre l'entraînement en traction d'un tube de recouvrement (12) avec la couronne de forage (9).
  19. Procédé de forage selon la revendication 18, dans lequel un premier tronçon de forage est réalisé avec le tube de protection (14), disposé entre le marteau (6) et le tube de recouvrement (12), pour forer une première section du trou de forage avec un diamètre de trou plus grand, et un deuxième tronçon de forage est réalisé sans le tube de protection (14), pour forer une deuxième section du trou de forage avec un diamètre de trou plus petit.
  20. Procédé de forage selon la revendication 18 ou 19, comportant en outre l'entraînement d'un système d'étanchéité (18) entre le tube de recouvrement (12) et le tube de forage (2).
EP05012538A 2005-06-10 2005-06-10 Appareil de forage à marteau à percussion et procédé associé Active EP1731708B1 (fr)

Priority Applications (12)

Application Number Priority Date Filing Date Title
AT05012538T ATE369481T1 (de) 2005-06-10 2005-06-10 Senkhammer-bohrvorrichtung und -verfahren
EP05012538A EP1731708B1 (fr) 2005-06-10 2005-06-10 Appareil de forage à marteau à percussion et procédé associé
DE502005001190T DE502005001190D1 (de) 2005-06-10 2005-06-10 Senkhammer-Bohrvorrichtung und -verfahren
EA200800001A EA014437B1 (ru) 2005-06-10 2006-06-07 Устройство для бурения с погружным пневмоударником и способ бурения по наносам
US11/921,904 US20090101413A1 (en) 2005-06-10 2006-06-07 DTH-hammer drilling device and overburden drilling method
EP06743121A EP1907663B1 (fr) 2005-06-10 2006-06-07 Dispositif de forage en percussion dans le puits et procédé de forage de couverture
ZA200800106A ZA200800106B (en) 2005-06-10 2006-06-07 DTH-hammer drilling device and overburden drilling method
AU2006256971A AU2006256971A1 (en) 2005-06-10 2006-06-07 DTH-hammer drilling device and overburden drilling method
AP2007004293A AP2007004293A0 (en) 2005-06-10 2006-06-07 Dth-Hammer drilling device and overburden drillingmethod
CA002654785A CA2654785A1 (fr) 2005-06-10 2006-06-07 Dispositif de forage en percussion dans le puits et procede de forage de couverture
PCT/EP2006/005427 WO2006131339A1 (fr) 2005-06-10 2006-06-07 Dispositif de forage en percussion dans le puits et procede de forage de couverture
CNA2006800204977A CN101203656A (zh) 2005-06-10 2006-06-07 潜孔锤钻进设备及覆盖层钻进方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05012538A EP1731708B1 (fr) 2005-06-10 2005-06-10 Appareil de forage à marteau à percussion et procédé associé

Publications (2)

Publication Number Publication Date
EP1731708A1 EP1731708A1 (fr) 2006-12-13
EP1731708B1 true EP1731708B1 (fr) 2007-08-08

Family

ID=35229884

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05012538A Active EP1731708B1 (fr) 2005-06-10 2005-06-10 Appareil de forage à marteau à percussion et procédé associé
EP06743121A Active EP1907663B1 (fr) 2005-06-10 2006-06-07 Dispositif de forage en percussion dans le puits et procédé de forage de couverture

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP06743121A Active EP1907663B1 (fr) 2005-06-10 2006-06-07 Dispositif de forage en percussion dans le puits et procédé de forage de couverture

Country Status (11)

Country Link
US (1) US20090101413A1 (fr)
EP (2) EP1731708B1 (fr)
CN (1) CN101203656A (fr)
AP (1) AP2007004293A0 (fr)
AT (1) ATE369481T1 (fr)
AU (1) AU2006256971A1 (fr)
CA (1) CA2654785A1 (fr)
DE (1) DE502005001190D1 (fr)
EA (1) EA014437B1 (fr)
WO (1) WO2006131339A1 (fr)
ZA (1) ZA200800106B (fr)

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US10260295B2 (en) 2017-05-26 2019-04-16 Saudi Arabian Oil Company Mitigating drilling circulation loss
CN107503680B (zh) * 2017-08-30 2023-07-28 河南豫中地质勘查工程有限公司 一种地面大直径快速成孔钻井设备及其方法
CN107724970A (zh) * 2017-11-07 2018-02-23 北京泰利新能源科技发展有限公司 一种潜孔锤转换接头、潜孔锤钻杆和潜孔锤
MX2019009794A (es) 2018-08-17 2020-02-18 Ancor Loc Nz Ltd Herramienta para desatascar un pozo o diametro interno.
CN109252816B (zh) * 2018-11-19 2023-08-15 吉林大学 边齿双束附壁射流冲击强冷式干热岩潜孔锤钻头
AT522402B1 (de) * 2019-04-11 2022-12-15 Rene Egger Verfahren und Vorrichtung zum Bohren von Löchern in Boden- oder Gesteinsmaterial

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DE10361080A1 (de) * 2003-12-22 2005-07-28 Blickhan, Elisabeth Charlotte Bohrvorrichtung

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AU2006256971A1 (en) 2006-12-14
AP2007004293A0 (en) 2007-12-31
EA200800001A1 (ru) 2008-06-30
DE502005001190D1 (de) 2007-09-20
EP1907663A1 (fr) 2008-04-09
US20090101413A1 (en) 2009-04-23
ATE369481T1 (de) 2007-08-15
ZA200800106B (en) 2009-08-26
EP1907663B1 (fr) 2013-02-20
EA014437B1 (ru) 2010-12-30
CN101203656A (zh) 2008-06-18
WO2006131339A1 (fr) 2006-12-14
CA2654785A1 (fr) 2006-12-14
EP1731708A1 (fr) 2006-12-13

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