EP2496786A2 - Procédé de forage, en particulier de forage par percussion ou par rotopercussion pour creuser des trous dans le sol ou dans des roches et dispositif associé - Google Patents

Procédé de forage, en particulier de forage par percussion ou par rotopercussion pour creuser des trous dans le sol ou dans des roches et dispositif associé

Info

Publication number
EP2496786A2
EP2496786A2 EP10787258A EP10787258A EP2496786A2 EP 2496786 A2 EP2496786 A2 EP 2496786A2 EP 10787258 A EP10787258 A EP 10787258A EP 10787258 A EP10787258 A EP 10787258A EP 2496786 A2 EP2496786 A2 EP 2496786A2
Authority
EP
European Patent Office
Prior art keywords
drill bit
adapter
drill
drilling
cladding tube
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.)
Granted
Application number
EP10787258A
Other languages
German (de)
English (en)
Other versions
EP2496786B1 (fr
Inventor
Karl BÖHM
Walter Karpellus
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.)
Dywidag Systems International GmbH Austria
Original Assignee
Dywidag Systems International GmbH Austria
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
Application filed by Dywidag Systems International GmbH Austria filed Critical Dywidag Systems International GmbH Austria
Priority to PL10787258T priority Critical patent/PL2496786T3/pl
Publication of EP2496786A2 publication Critical patent/EP2496786A2/fr
Application granted granted Critical
Publication of EP2496786B1 publication Critical patent/EP2496786B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
    • 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
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
    • 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 methods for drilling, in particular impact or rotational impact drilling holes in soil or rock material, wherein a borehole is formed by a drill bit mounted on a drill string by a striking and / or rotating movement, a cladding tube adjoining the drill bit Pulling and / or hitting is introduced into the borehole and mined material is introduced via at least one passage opening formed between the drill bit and the cladding tube into the annular space formed between the outer circumference of the drill string and the inner circumference of the cladding tube and discharged from the borehole.
  • the invention relates to a device for drilling, in particular impact or rotary impact drilling holes in soil or rock material, wherein formed by a drill bit mounted on a drill bit by a beating and / or rotating movement a borehole, a subsequent to the drill bit sheath Pulling and / or beating can be introduced into the borehole and mined material can be introduced via at least one passage opening formed between the drill bit and the jacket tube into the annular space formed between the outer circumference of the drill rod and the inner circumference of the jacket tube and can be brought out of the borehole.
  • a percussion or rotary impact drilling is by means of a drill string mounted on a drill bit, wherein moreover a jacket or sheath into the well for an optionally required further lining, or to a breaking material
  • the impact energy is either applied directly to the drill bit via the drill string or through complicated devices such as slippers.
  • the present invention now aims to further develop a method and apparatus of the type mentioned in that adaptation to a variety of subsoil conditions is possible quickly and reliably and that any combinations of the elements used when drilling holes in soil or rock directly can be assembled and used on site in accordance with the requirements. Furthermore, it is an object of the invention to minimize the number of different prefabricated holes drilling apparatuses.
  • a method of the type mentioned is essentially characterized in that the impact energy of the drill string is applied via a cooperating with the drill bit and the drill string adapter to the drill bit and that the impact energy at least partially over a hitting shoulder of the adapter and at least partially is applied to the drill bit via a threaded connection between adapter and drill bit.
  • the method according to the invention is preferably performed so that the adapter is coupled to the drill bit by screwing over a coarse thread connection.
  • the adapter by coupling the adapter to the drill bit by screwing via a coarse screw connection, it is possible to ensure that screwing after completion of the drilling operation, and especially after the threaded connection of the adapter to the drill bit of the large load has been applied by introducing the impact energy, safely and reliably to solve and bring the Bohrgestfite together with the adapter from the borehole. Furthermore, this ensures that the adapter can be used multiple times, which brings not inconsiderable economic benefits.
  • the inventive method is preferably further developed such that the adapter with the drill string by screwing over a thread, in particular one opposite to the Thread connection between drill bit and adapter thread having less pitch, is coupled.
  • the inventive method is preferably further developed so that rinsing liquid is discharged through the tubular adapter and cooperating openings in the drill bit during drilling.
  • Replacement Blade (RULE 26) is performed that rinsing liquid is discharged through the tubular adapter and cooperating openings in the drill bit during drilling, it is possible on the one hand with a structurally simple device sufficient amounts of drilling fluid during drilling apply, both to the mining front and possibly immediately to an end region of a drill bit facing away from the bore hole interior or into an annular space between the drill bit and a cladding tube in order to prevent laying of the openings and passages with drill cuttings, and also to ensure that an excessive loss of drilling fluid during drilling can be avoided.
  • the invention is further developed in that rinsing liquid is intermittently applied via an adapter arranged in the intervention rinsing valve during engagement of the drill bit in the soil or rock material.
  • the inventive method is preferably developed to the effect that the impact energy in addition at least partially trained on the drill bit on the shoulder Cladding tube is applied.
  • part of the impact energy is additionally applied to the cladding tube via a striking shoulder formed on the drill bit, ensuring reliable and reliable pulling of the cladding tube into the interior of the borehole.
  • a device for drilling, in particular impact or rotary impact drilling of soil or rock material of the type mentioned above essentially characterized in that a cooperating with the drill pipe and the drill bit adapter is provided and that the
  • Adapter cooperates via a shoulder of the adapter and a threaded connection between the adapter and drill bit with the drill bit.
  • the drill bit and drill string can be arbitrarily selected to suit the requirements of forming a hole in the soil and rock material and combining the respective suitable elements.
  • the adapter By forming the adapter so that the adapter cooperates with the drill bit via a shoulder of the adapter and via a threaded connection between the adapter and the drill bit, it is ensured that, on the one hand, the drilling energy is reliably and reliably transmitted to the drill bit, and on the other hand, that the delicate for a knock or damage threaded connection between adapter and drill bit is claimed as little as possible.
  • Such a threaded connection can be designed, for example, as a coarse thread connection with two gears, with which both a secure and reliable hold of the adapter in the drill bit can be ensured and, on the other hand, an intentional release of the adapter from the drill bit can be achieved.
  • the device is designed so that the adapter with the drill string via another thread, which deviates from the threaded connection between the adapter and drill bit pitch of the thread, in particular a smaller pitch, is coupled, it is possible to withstand accidental release of the adapter from the drill pipe both during the drilling process as well as when unscrewing the adapter from the drill bit with certainty. Furthermore, it is ensured with such a design that at the end of the drilling process
  • RULE 26 At least the drill pipe and the adapter can be recovered undamaged, whereby a not insignificant cost savings can be achieved.
  • the device is designed so that the end face of the adapter facing the well bore is at least partially beveled, it succeeds, the adapter coupled to the drill string, especially if maintenance during training the borehole are required to safely insert together with the drill string in the drill bit and to screw with this, so that even for example in semi-finished holes adaptation work on the linkage can be made.
  • the invention is preferably further developed such that the tubular adapter is formed with a bore hole interior facing passage for rinsing liquid and that the passage opening cooperates with openings for dispensing rinsing liquid in the drill bit.
  • the device is designed so that an intervention-controlled flush valve is provided in the adapter.
  • an intervention-controlled flushing valve in the adapter, a controlled discharge of flushing liquid through the adapter and through the flushing openings formed in the drill bit is achieved, whereby on the one hand only those quantities of flushing liquid are discharged which are required for a proper removal of the cuttings and, on the other hand laying of the openings, in particular the flushing opening with cuttings is held back.
  • the intervention-controlled flush valve may be formed via a pressure switch formed in the previously described annular space or a pressure valve.
  • the device according to the invention is further developed in that the drill bit has at least one impact shoulder for interaction having the cladding tube, in particular for impact stress of the cladding tube.
  • the cladding tube is also subjected to impact stress during the impact stress of the drill bit in its front end region and thus can be introduced into the drilled hole without impacting from outside.
  • the cladding tube is hiebei drawn by the impact stress at its front end portion in the interior of the wellbore.
  • the cladding tube is formed so that it is formed thickened at its end facing the bore hole inside and that the thickening is formed at its end remote from the bore hole inside complementary to a whipping shoulder of the drill bit, is ensured by an interaction of the complementarily formed impact shoulder of the drill bit with the thickened portion of the cladding tube reliable impact or introduction of the cladding tube in the wellbore.
  • any cladding tube which appears suitable for the expected drilling operation for example an expandable cladding tube
  • Replacement Blade (RULE 26) a restoration of the free movement of the cladding tube in the borehole interior, for example, by an impact stress from the outside can be achieved.
  • the device is developed so that the end of the cladding tube facing the well inside is formed with a recess, in particular an asymmetrically formed recess, the drill bit can be dropped from the cladding tube, thereby a separation of the drill bit and cladding tube can be achieved and, for example, in the case of a split drill bit at least a portion of the drill bit after completion of the drilling process is recoverable together with the drill pipe and the adapter from the wellbore.
  • FIG. 1 shows a section through the device according to the invention for carrying out the method according to the invention for drilling holes
  • FIG. 2 is an external view, partly in perspective of the device of FIG. 1
  • FIG. 3 is a longitudinal section through a variant of the adapter of FIG. 1
  • Fig. 4 is a longitudinal section through a modified variant of the adapter according to the invention.
  • FIG. 5 shows a section through the end region facing the borehole interior of a variant of a cladding tube of the device according to the invention for drilling holes.
  • a generally designated 1 device for drilling or rotary drilling holes in soil or rock material has a schematically indicated with 2 drill bit, which is connected via an adapter 3 with a schematically indicated in Fig. 1 drill string 4 is.
  • the drill bit 2 is adjoined by a cladding tube 5, the end region 6 of which facing the drilled hole interior facing away from the borehole exterior
  • Area of the cladding tube 5 has increased thickness.
  • This end region 6 is beveled at its end region 7 facing away from the bore hole inside and formed complementarily in the shape of a striking shoulder 8 of the drill bit 2.
  • a striking shoulder 8 of the drill bit 2 During the drilling of holes is applied by this training on the hitting shoulder 8 on the chamfer 7 at least a portion of the impact energy, so that the cladding tube 5 is pulled along during the drilling progress in the wellbore 1.
  • the drill bit 2 is connected to the adapter 3 with a thread schematically indicated by 9, wherein over the borehole facing the end of the adapter 3 and the drill bit 2, an annular space 10 is formed, through which annular space 10 rinsing liquid, which by a hollow inside trained adapter 3 provided rinsing liquid channel 11 and provided in the drill bit 2 holes 12 for the passage of rinsing liquid to the interior of the wellbore is ausbringbar.
  • the applied via the drill pipe 4 on the adapter 3 drilling energy is applied in the embodiment of FIG. 1 on the one hand via a striking shoulder 13 on the drill bit 2, on the other hand partially on the thread 9.
  • Such a design ensures that the thread 9 is not during the drilling process is unduly stressed and in particular is not knocked out, so that after the end of the drilling process a safe and reliable separation of the adapter 3 is made possible by the drill bit 2.
  • the drill bit 2 shown in Fig. 1 is hiebei a conventional one-piece drill bit, which has a plurality of drill pins 14 and in addition to the openings, the dispensing of rinsing fluid 12 recesses 15, on which cuttings formed by between the cladding tube 5 and the drill bit 2 Recesses 16 can be introduced into the formed between the adapter 3 and the drill pipe 4 and the cladding tube 5 annulus 17 and can be discharged in the sequence on the outside of the borehole.
  • the drill bit 2 In order to hold back laying of the annular space 17 with cuttings, the drill bit 2 also has a backward flushing channel 27, through which the annular space 17 can be sufficiently rinsed.
  • the reference numerals of FIG. 1 are retained, wherein in the illustration of FIG. 2 it can be seen that the cladding tube 5 has at its end region 6 facing the borehole interior a reduced diameter compared to the region facing the borehole exterior Diameter reduction can be achieved in a simple manner by pressing the cladding tube 5 on a drill bit 2, so that before starting a drilling operation, any combination of drill bit 2, adapter 3, drill pipe 4 and cladding tube 5 can be compiled depending on the expected requirements, thereby an extremely simple and inexpensive variant of a device for drilling holes
  • the cladding tube 5 in this variant can be any cladding tube, as used during drilling holes in soil and rock material used, such as a frictionally introduced cladding tube, expandable cladding tube, drainage pipe or even a example certain mobility of the individual forming the cladding tube segments exhibiting cladding tube, which can follow to a certain extent deviations from the direction of the bore.
  • the drill bit 2 used in this context can be arbitrarily selected differently from the illustrations of FIG. 1 and FIG. 2, wherein in addition to a one-piece drill bit a multi-part drill bit, from which after completion of the drilling process, for example, only a part in the interior of the borehole remains, an asymmetrically shaped drill bit and a drill bit, which instead of drilling pins cutting, can be used.
  • Fig. 2 is also schematically at the top of the bore hole facing the edge 18 of the cladding tube 5 an asymmetrically formed recess 19 recognizable, which recess 19 has a vertical or steep side wall 26 and a second cheek 20 low pitch, with such a depression at -
  • recess 19 has a vertical or steep side wall 26 and a second cheek 20 low pitch, with such a depression at -
  • the ejection of the drill bit 2 after completion of the drilling process is possible.
  • a variant of the adapter 3 of Fig. 1 is shown, wherein the adapter, in turn, on the one hand a thread 9 at its end, which is to be coupled with a drill bit 2.
  • the thread 9 of the adapter 3 is hiebei designed as a coarse thread with two courses, on the one hand to ensure a secure and reliable connection of the adapter 3 with the drill bit 2 during the drilling process and on the other hand to be able to solve the adapter 3 of the drill bit 2 so after completion of the drilling process in that the connection between the drill bit 2 and the adapter is that connection of the entire apparatus 1 for drilling holes in soil or rock material which first comes loose under appropriate stress.
  • another thread 21 is provided in the interior of the hollow-shaped adapter 3 at its region facing the borehole for connection to a drill pipe 4, wherein the thread 21 in comparison with the thread 9 of a
  • Replacement Blade on the other hand has significantly more courses and on the other hand has a significantly low pitch to withstand accidental release of the connection of the adapter 3 with the drill string, especially after completion of the drilling process with certainty.
  • the hitting shoulder 13 of the adapter 3 is notched in deviation from the illustration of FIG. 1 formed in order to apply the impact energy even better on the drill bit 2, wherein in particular in a tapered design of the hitting shoulder 13 of the wear of Schlagschulter 13 is significantly reduced.
  • the end region 22 of the adapter 3 facing the borehole interior is provided with bevels 23 in order to facilitate insertion or threading of the adapter 3 into a drill bit 2, which is advantageous in particular during exchange of the drill string during the drilling process is.
  • the adapter 3 has a coarse thread 9 for the insertion of the adapter 3 in a drill bit 2, as well as another thread 21, which a comparison with the thread 9 significantly reduced slope and a significantly increased number of courses.
  • the striking shoulder 13 is chamfered and a chamfer 23 on the end face 22 of the adapter 3, which faces the borehole interior formed.
  • a pressure switch 24 is provided in the variant according to FIG.
  • the adapter 3 In connection with the adapter 3 it is noted that its outer dimensions, such as e.g. his thread 9 and 21 are formed such that are suitable for all common drill bits 2 and drill pipe 4, so that the adapter 3 is a universal element, by the use of any other commonly used auxiliary equipment, such as flip-flops, special connecting sleeves for connecting Drill bit and drill pipe and the like. Not required, resulting in a simplified, economical and universally applicable device for drilling holes in soil or rock material by using the adapter 3 according to the present invention.
  • any other commonly used auxiliary equipment such as flip-flops, special connecting sleeves for connecting Drill bit and drill pipe and the like.
  • FIG. 5 a section, in particular a longitudinal section, through the end region of a cladding tube 5 facing the borehole interior, is shown, wherein in turn the end region 6 of the cladding tube 5 facing the borehole interior is thickened.
  • a shoulder 7, for cooperation with a shoulder 8 of a drill bit 2 is formed in order to move the cladding tube 5 into the borehole interior.
  • the depression 19 is shown on the edge region 18 of the cladding tube 5 facing the bore hole inside, wherein the side cheek 20 of the recess 19 is designed such that it extends to the edge 18 with a slight incline.
  • the second side wall 26 of the recess 9 is hiebei normal to the edge
  • the cladding tube 5 is pressed onto the drill bit 2 that it is slidably mounted in the longitudinal direction of the drill bit 2, in addition, if necessary, from the Bohrlochoteren on the cladding. 5 a striking energy to be applied in addition to the pulling of the sheath tube 5 via the coupling between the hitting shoulder 8, the drill bit 2 and the
  • Such wrapping of the cladding tube 5 may be required in certain cases, such as when the passage gap 16 between the drill bit 2 and cladding tube is laid by cuttings or further entrainment of the cladding tube 5 with the drill bit 2 due to broken material, the space between the edge 18th of the cladding tube 5 and a corresponding region of the drill bit 2 projecting beyond the cladding tube 5 or flush with it.

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

Abstract

L'invention concerne un procédé de forage, en particulier de forage par percussion ou par rotopercussion pour creuser des trous dans le sol ou dans des roches. Selon ce procédé, un trou de forage est formé par un mouvement de percussion et/ou de rotation au moyen d'une couronne de forage (2) montée sur une tige de forage (4), un tube de gainage (5) raccordé à la couronne de forage (2) est introduit dans le trou de forage par traction et/ou enfoncement et la matière enlevée est introduite, par au moins une ouverture de passage (11) ménagée entre la couronne de forage (2) et le tube de gainage (5), dans l'espace annulaire formé entre la périphérie extérieure de la tige de forage (4) et la périphérie intérieure du tube de gainage (5), puis évacuée du trou de forage. L'invention se caractérise en ce que l'énergie de percussion de la tige de forage (4) est appliquée à la couronne de forage (2) par l'intermédiaire d'un adaptateur (3) coopérant avec la couronne de forage (2) et la tige de forage (4) et cette énergie de percussion est appliquée à la couronne de forage (2) au moins partiellement par l'intermédiaire d'un épaulement de percussion (13) de l'adaptateur (3) et au moins partiellement par l'intermédiaire d'un raccord fileté (9) entre l'adaptateur (3) et la couronne de forage (2). L'invention concerne en outre un dispositif permettant de mettre en oeuvre ce procédé.
EP10787258.2A 2009-11-06 2010-11-05 Procédé de forage, en particulier de forage par percussion ou par rotopercussion pour creuser des trous dans le sol ou dans des roches et dispositif associé Not-in-force EP2496786B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10787258T PL2496786T3 (pl) 2009-11-06 2010-11-05 Sposób wiercenia, a zwłaszcza wiercenia udarowego lub obrotowo-udarowego otworów w materiale gruntowym lub skalnym i urządzenie do tego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1763/2009A AT508991B1 (de) 2009-11-06 2009-11-06 Verfahren zum bohren, insbesondere schlag- oder drehschlagbohren von löchern in boden oder gesteinsmaterial sowie vorrichtung hiefür
PCT/AT2010/000422 WO2011054020A2 (fr) 2009-11-06 2010-11-05 Procédé de forage, en particulier de forage par percussion ou par rotopercussion pour creuser des trous dans le sol ou dans des roches et dispositif associé

Publications (2)

Publication Number Publication Date
EP2496786A2 true EP2496786A2 (fr) 2012-09-12
EP2496786B1 EP2496786B1 (fr) 2013-09-18

Family

ID=43502667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10787258.2A Not-in-force EP2496786B1 (fr) 2009-11-06 2010-11-05 Procédé de forage, en particulier de forage par percussion ou par rotopercussion pour creuser des trous dans le sol ou dans des roches et dispositif associé

Country Status (8)

Country Link
US (1) US20120247835A1 (fr)
EP (1) EP2496786B1 (fr)
AT (1) AT508991B1 (fr)
AU (1) AU2010314788A1 (fr)
CA (1) CA2791524A1 (fr)
ES (1) ES2440071T3 (fr)
PL (1) PL2496786T3 (fr)
WO (1) WO2011054020A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9016402B2 (en) * 2011-09-08 2015-04-28 Garry Thorne Geological drill
CN103061685B (zh) * 2013-01-08 2017-02-08 深圳市阿特拉能源技术有限公司 井底钻进工具及其防脱落自锁紧结构
AT15453U1 (de) * 2016-04-07 2017-09-15 Dywidag-Systems Int Gmbh Bohrkopf mit einem Meisselhalter sowie Verfahren zum Zusammenbauen desselben
AT15452U1 (de) * 2016-04-07 2017-09-15 Dywidag-Systems Int Gmbh Vorrichtung zum Bohren, insbesondere Schlag- oder Drehschlagbohren von Löchern in Boden- oder Gesteinsmaterial sowie Verfahren zum nachträglichen Anordnen eines Mitnehmers an einer derartigen Vorrichtung
WO2021069657A1 (fr) * 2019-10-11 2021-04-15 Sandvik Mining And Construction Tools Ab Ensemble de forage protégé par un épaulement
CN116058135A (zh) * 2023-04-04 2023-05-05 绿苑景观规划设计(山东)有限公司 一种圆形栽植穴打孔装置

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SE320343B (fr) * 1963-09-11 1970-02-09 Stabilator Ab
SE400346B (sv) * 1977-05-24 1978-03-20 Sandvik Ab Backventil for bergborrar
SE467632B (sv) * 1990-01-17 1992-08-17 Uniroc Ab Borrverktyg foer slaaende och roterande borrning under samtidig neddrivning av ett foderroer
SE527202C2 (sv) * 2004-08-17 2006-01-17 Sandvik Intellectual Property Bergborrkrona och gängförband för slående bergborrning
CA2619175C (fr) * 2005-08-19 2012-12-11 "Alwag" Tunnelausbau Gesellschaft M.B.H. Procede et dispositif d'elimination du blocage d'une couronne lors du forage
EP1818499B1 (fr) * 2006-02-09 2011-08-17 Gonar Sp. Zo.o. Dispositif permettant le forage et le tubage simultané
JP5135962B2 (ja) * 2007-09-11 2013-02-06 三菱マテリアル株式会社 掘削工具、掘削ビット及びデバイス

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
AT508991A1 (de) 2011-05-15
CA2791524A1 (fr) 2011-05-12
AT508991B1 (de) 2012-09-15
WO2011054020A3 (fr) 2011-10-27
EP2496786B1 (fr) 2013-09-18
AU2010314788A1 (en) 2012-06-14
ES2440071T3 (es) 2014-01-27
WO2011054020A2 (fr) 2011-05-12
PL2496786T3 (pl) 2014-02-28
US20120247835A1 (en) 2012-10-04

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