WO2020207616A1 - Procédé et dispositif pour forer des trous dans le sol ou de la roche - Google Patents

Procédé et dispositif pour forer des trous dans le sol ou de la roche Download PDF

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Publication number
WO2020207616A1
WO2020207616A1 PCT/EP2020/000079 EP2020000079W WO2020207616A1 WO 2020207616 A1 WO2020207616 A1 WO 2020207616A1 EP 2020000079 W EP2020000079 W EP 2020000079W WO 2020207616 A1 WO2020207616 A1 WO 2020207616A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill bit
flushing fluid
borehole
drill
drilling
Prior art date
Application number
PCT/EP2020/000079
Other languages
German (de)
English (en)
Inventor
René EGGER
Dieter Alexander SIERING
Original Assignee
Egger Rene
Siering Dieter Alexander
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 Egger Rene, Siering Dieter Alexander filed Critical Egger Rene
Publication of WO2020207616A1 publication Critical patent/WO2020207616A1/fr

Links

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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
    • 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
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers
    • 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
    • E21B7/208—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes using down-hole drives

Definitions

  • the present invention relates to a method for drilling, in particular percussion or rotary percussion drilling, holes in soil or rock material, a borehole being formed by a drill bit mounted on a drill string and wherein a gaseous flushing fluid, in particular air, in Areas on the outer circumference of a mining surface of the drill bit is introduced into the area in front of the drill bit and is brought out of the borehole together with the excavated material via at least one essentially central passage opening of the drill bit.
  • a gaseous flushing fluid in particular air
  • the present invention also relates to a device for drilling, in particular percussion or rotary percussion drilling, holes in soil or rock material, a drill bit mounted on a drill rod forming a borehole and a flushing fluid being introduced into the area in front of the drill bit during the drilling process and can be brought out of the borehole together with the excavated material, the drill bit having at least one outlet opening for a gaseous flushing fluid, in particular air, in the area of the outer circumference of its excavation surface and at least one essentially central passage opening at the
  • Drill bit is provided for discharging the flushing fluid together with the excavated material.
  • a method as well as a device of the type mentioned at the beginning with an introduction of a flushing fluid on an outer area of a mining surface of a drill bit and a removal of the flushing fluid together with the excavated material are, for example, from DE 28 54 461 A1 or EP 0 692 in drilling devices designed as hammer drills 062 B1 known.
  • the drive medium in particular compressed air, is also used as a flushing fluid to act on the hammer drill via complex valve and line constructions.
  • a modified method and a device for drilling, in particular percussion or rotary percussion drilling, holes in soil or rock material can be found in AT-B 390 303, for example.
  • a hollow drill rod is used in order to enable a flushing agent to be fed into a substantially central region of the drill bit or the excavation surface thereof for flushing and cooling the same. Furthermore, in this known embodiment, it is provided that the excavated material on the outer circumference of the drill string to the outside or from the borehole ge promotes or is brought out.
  • a rinsing agent is again introduced into the area of the excavation area of the drill bit and this rinsing agent is applied together with the excavated material, in particular in an annular space between the drill rod and a casing or casing tube adjoining the drill bit, is, for example, WO A1 2005/031107 can be found.
  • water or a similar rinsing liquid is usually used both for rinsing and for cooling the drill bit or, in particular, the excavation surface thereof, whereby in particular taking into account a usually small free space on the outer surface of the drill bit and between a drill rod and a casing tube
  • the free space available gives rise to problems in the application of the excavated material.
  • a flushing liquid especially in loose soil or rock material, it is not ensured that such a flushing liquid does not lead to leaching or the formation of large cavities in the borehole, which for example subsequently have to be filled by introducing large quantities of backfill material, such as concrete .
  • the present invention is therefore aimed at developing a method and a device for drilling, in particular percussion or rotary percussion drilling, holes in soil or rock material of the type mentioned at the outset in such a way that the disadvantages of the above-mentioned known embodiments are avoided or at least largely can be reduced.
  • the invention aims in particular to provide such a method and such a device with which it can be ensured that all of the excavated material is reliably discharged from the hole or bore made and, if necessary or necessary, an exact one Determination and / or separation of the applied material is made possible.
  • a method of the type mentioned at the beginning is essentially characterized in that the flushing fluid is introduced in front of the excavation surface via at least one outlet opening of an annular drill bit surrounding a central or central pilot drill bit and the flushing fluid with the excavated material is carried out via the at least one through opening formed in the pilot bit is brought out.
  • a gaseous flushing fluid in particular air
  • a gaseous flushing fluid in particular air
  • This targeted discharge of the flushing fluid only into the space immediately in front of the drill bit formed by the pilot drill bit and the ring drill bit is supported according to the invention in that the flushed fluid is discharged from the borehole together with the excavated material via the at least one essentially central passage opening of the pilot drill bit, so that it is ensured that after the flushing fluid has been introduced essentially on the outer circumference of the excavation surface of the drill bit, this flushing fluid is immediately returned to the flushing fluid, in particular air, by a subsequent removal of the same together with the degraded material via the at least one central passage opening central area of the drill bit is generated. In this way, it is particularly reliably ensured that the excavated material, which is located essentially in front of the excavation surface of the drill bit, is discharged or discharged together with the flushing fluid introduced immediately after its degradation.
  • the flushing fluid be introduced into the area of the excavation surface of the drill bit via an outer annular space of a drill rod designed as a double-walled tube and that the flushing fluid is discharged from the borehole together with the excavated material via an internal cavity of the double-walled drill pipe.
  • the flushing fluid can thus be reliably introduced into areas or outlet openings on the outer circumference of the excavation surface of the drill bit and the flushing fluid introduced can be reliably transferred together with the excavated material central or inner cavity of the double-walled drill rod are brought out.
  • the rinsing fluid is also used as a working fluid for acting on a hammer unit of a down-the-hole hammer.
  • an extremely efficient drilling method can also be made available by using a down-the-hole hammer to act on the drill bit formed by the pilot drill bit and the ring drill bit surrounding it.
  • the material discharged from the borehole with the flushing fluid, degraded material is collected especially after separation from the flushing fluid.
  • the volume and / or weight of the mined material is or are determined after it has been extracted from the borehole.
  • this can be checked reliably and in a simple manner Whether, with knowledge of the known volume of the hole produced or the hole produced, the collected material corresponds to the dimensions of the hole, so that in particular it can be checked whether, for example in brittle or loose material, voids have not arisen during the drilling process, which can lead directly to strength problems or subsidence in the area of the hole produced and / or possibly require the use of increased amounts of solidifying material, such as concrete. Furthermore, through the collection of the degraded material provided according to the invention, in particular after separation from the flushing fluid, it can be ensured that any contaminated material can be reliably disposed of separately.
  • the drill bit is subjected to a percussive and / or rotating impact to form the borehole.
  • the drill bit is guided essentially sealingly on the borehole wall in an area adjoining the excavation surface, which ensures reliable discharge of all the excavated material through the at least one essentially central passage opening of the drill bit.
  • a device of the above-mentioned type is also essentially characterized in that the drill bit is formed by a central or central pilot drill bit and an annular drill bit surrounding the pilot drill bit and that the at least one outlet opening for the introduction of the flushing fluid is in front the mining surface is formed in the ring drill bit and the at least one passage opening for discharging the flushing fluid with the excavated material is formed in the pilot drill bit.
  • this not only enables reliable flushing or cooling of the pilot Drill bit and the ring drill bit formed as well as their mining surface, but it is also ensured that by a directional deflection of the flushing fluid from the areas of the outer circumference of the mining surface of the drill bit and in particular the ring drill bit in the direction of the at least one essentially central passage opening of the pilot drill bit the entire excavated material can also be discharged from the hole or bore produced together with the flushing fluid.
  • the drill bit has a plurality of outlet openings for the flushing fluid in the ring drill bit that are essentially evenly distributed over the circumference.
  • the flushing fluid in particular air, is evenly distributed over the circumference or outer circumference of the drill bit, so that the entire excavation area of the drill bit is reliably swept over by the flushing fluid and also over the entire excavation area the excavated material together with the flushing fluid via the at least one central or central passage opening can be brought out.
  • the drill rod is formed by a double-walled tube, with the flush fluid via an outer annular space of the drill rod into the area of the excavation area Drill bit can be introduced and the flushing fluid can be brought out of the borehole together with the removed material via an internal cavity of the double-walled drill string, as corresponds to a further preferred embodiment of the device according to the invention.
  • the drill bit is coupled at its end facing away from the excavation surface with a hammer unit of a down-the-hole hammer, which can be acted upon by the flushing fluid.
  • the flushing fluid is also used at the same time to improve the mining performance while increasing the drilling speed using a down-the-hole hammer to act on the drill bit formed by the ring drill bit and pilot drill bit.
  • a device for collecting the excavated material discharged from the borehole is connected to the tubular element of the drill string defining the inner cavity.
  • a device is provided for determining the volume and / or weight of the excavated material after it has been extracted from the borehole.
  • a tubular element of the drill rod defining the interior cavity is guided outside the borehole through a flushing head for supplying the flushing fluid and / or a rotary drive for rotating the drill head via the drill rod.
  • Fig. 1 is a schematic view, partly in section, of a device according to the invention for performing the method according to the invention for drilling, in particular percussion or rotary percussion drilling, a hole in a soil or rock material;
  • FIG. 2 shows, in an enlarged representation, details of the drill bit and an adjoining area of the device according to the invention, again partially in section for carrying out the method according to the invention; and FIGS. 3 to 6 show sectional views along the lines III-III, IV-IV, V-V and VI-VI of FIG. 2 through the region of the drill bit of the device according to the invention in different sectional planes.
  • a device for drilling, in particular percussion or rotary percussion drilling, a hole or borehole 2 in a soil or rock material designated by 3 is shown schematically and partially in section.
  • the device 1 comprises a drill bit mounted on a drill rod schematically denoted by 4, generally denoted by 5, which consists of a central pilot drill bit 6 and an annular drill bit 7 surrounding this pilot drill bit 6, as shown in the following Representations in detail will become more apparent.
  • the drill bit 5 is driven via the drill rod 4 by a rotary drive, indicated schematically by 8 and arranged outside the hole 2, to a rotary movement rotating around the longitudinal axis essentially defined by the drill rod 4.
  • a hammer unit 10 cooperating with the end facing away from a working surface 9 of the drill bit 5 is additionally acted upon by a striking movement based on the principle of a down-the-hole hammer.
  • the drill rod 4 is, as will become clearer from the following figures, in particular formed by a double-walled tube, with a flushing fluid, in particular air, via an external cavity 11 of the same, according to the arrows 12 in the direction of the drill bit 5 or the excavation surface 9 of the same is directed.
  • the flushing fluid or the air emerges in the area of the outer circumference of the drill bit 5, as will be more clearly evident in particular from FIGS. 2 to 6, into the space in front of the mining surface 9 of the drill bit 5 from the ring drill bit 6 and, as is done through it the arrows 13 in Fig.
  • This flushing fluid which is diverted according to the arrows 13, is discharged from the hole 2 together with the excavated material 15 according to the arrows 16 through an inner or central cavity 17 in the interior of the double-walled drill rod 4.
  • the tubular element 18 of the double-walled drill rod 4 defining the inner cavity 17 is passed not only through the rotary drive 8, but also through a flushing head 19, indicated schematically with 19, also arranged outside the hole 2.
  • This rinsing head 19 serves in particular to introduce or supply the rinsing fluid, in particular the air, accordingly the arrow 20 in the external hollow or annular space 11 of the double-walled drill rod 4.
  • the degraded material 15 is collected in a collecting device 23 collected.
  • this collecting device 23 either the volume of the excavated material 15 can be determined and / or the weight of the excavated material 15 can additionally be determined by a weighing device 24. In this way, the dimensions of the hole 2 produced can be reliably compared with the amount of the excavated material 15 discharged from the hole 2. Furthermore, due to the separate collection of the degraded material 15 in the device 23, this degraded material 15 can also be removed or disposed of separately, as is increasingly required for contaminated material, for example.
  • the flushing fluid introduced via the outer tube 11 can also act on the hammer unit 10 of the down-the-hole hammer, so that the drill bit 5 as a whole via the drill drive 8 of a rotating as well as via the hammer unit 10 is subjected to an impact.
  • a casing or casing tube 25 adjoins the end 12 of the drill bit facing away from the mining surface 9 is provided on the drill bit 5 and is introduced into the hole 2 together with it.
  • both the double-walled drill rod 4 and the casing or jacket tube 25 are connected, for example, via plug connections corresponding seals to achieve correspondingly large borehole depths.
  • FIG. 2 in a sectional illustration similar to the illustration according to FIG. 1, the area of the drill bit 5 and the interacting elements of the device 1 for making a hole 2 in the soil or rock material 3 are shown, wherein the illustration of the drill bit 5 with the central passage openings 14 is shown rotated by 90 ° compared to the illustration of FIG.
  • arrows 12 show the introduction of the flushing fluid, in particular air, both to the hammer unit 10 and subsequently into the area on the outer circumference of the excavation surface 9 of the drill bit 5 in the ring drill bit 6.
  • the air supplied via the outer annular space 11 of the double-walled drill rod 4 is guided as flushing fluid in several passage channels designated by 26 to outlet openings 27, which are located on the outer circumference of the mining surface 9 of the drill bit 5 are provided, these outlet openings 27 opening into the ring drill bit 7.
  • FIG. 2 essentially pin-like mining elements formed by hard material inserts 28, for example, are also indicated on the mining surface 9 of the drill bit.
  • corresponding cutting edges or the like can also be provided on the dismantling surface 9 of the drill bit 5 to support or accelerate the drilling process.
  • the region 29 of the ring drill bit 7 adjoining the excavation surface 9 lies essentially sealingly against the inside of the hole 2 in the soil or rock material 3, so that it is ensured that the excavated material 15 via the passage openings 14 and the adjoining inner cavity 17 of the double-walled drill rod 4 according to the arrow 16 in common sam with the flushing fluid.
  • a vertical or inclined orientation of the hole 2 to be produced in the soil or rock material 3 can be provided in the figures.

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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)

Abstract

L'invention concerne un procédé ainsi qu'un dispositif (1) pour forer, en particulier forer par percussion ou rotopercussion des trous dans le sol ou de la roche (3), une couronne (5) de forage montée sur un train de tiges (4) formant un trou (2) de forage et un fluide de rinçage pouvant être introduit dans la zone située devant la couronne (5) de forage pendant le processus de forage et pouvant être évacué du trou (2) de forage conjointement avec le matériau extrait (15). Selon l'invention, la couronne (5) de forage est formée par une couronne de forage pilote (6) centrale et une couronne de forage annulaire (7) entourant la couronne de forage pilote (6), et au moins une ouverture de sortie (27) pour l'introduction du fluide de rinçage est formée devant la surface d'extraction (9) dans la couronne de forage annulaire (7), et au moins une ouverture de passage (14) pour une évacuation du fluide de rinçage conjointement avec le matériau extrait est formée dans la couronne de forage pilote (6), ce qui a pour effet qu'une évacuation fiable et sûre de l'ensemble du matériau extrait (15) du trou (2) de forage est possible.
PCT/EP2020/000079 2019-04-11 2020-03-31 Procédé et dispositif pour forer des trous dans le sol ou de la roche WO2020207616A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA131/2019A AT522402B1 (de) 2019-04-11 2019-04-11 Verfahren und Vorrichtung zum Bohren von Löchern in Boden- oder Gesteinsmaterial
ATA131/2019 2019-04-11

Publications (1)

Publication Number Publication Date
WO2020207616A1 true WO2020207616A1 (fr) 2020-10-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/000079 WO2020207616A1 (fr) 2019-04-11 2020-03-31 Procédé et dispositif pour forer des trous dans le sol ou de la roche

Country Status (2)

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AT (1) AT522402B1 (fr)
WO (1) WO2020207616A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1016657B (de) * 1956-10-24 1957-10-03 Wolfgang Herbold Dr Ing Tiefbohreinrichtung mit einer Wasserstrahlpumpe zur Foerderung des Bohrkleins durch das Bohrgestaenge
DE2854461A1 (de) 1978-12-16 1980-06-19 Hydroc Gmbh Ringbohrhammer
AT390303B (de) 1985-03-27 1990-04-25 Klemm Bohrtech Bohrvorrichtung
EP0692062B1 (fr) 1993-04-08 1999-06-16 Sandvik Aktiebolag Foreuse a percussion a circulation inversee et foret pour celle-ci
WO2005031107A1 (fr) 2003-10-01 2005-04-07 Techmo Entwicklungs- Und Vertriebs Gmbh Procede et dispositif de forage dans de la terre ou de la pierre
DE60207059T2 (de) * 2001-04-04 2006-07-27 Oy Atlas Copco Rotex Ab Bohrverfahren und bohrvorrichtung
KR20060106115A (ko) * 2005-04-06 2006-10-12 노승관 대구경 지반굴착 장치 및 방법
EP1731708A1 (fr) * 2005-06-10 2006-12-13 Geomechanik Wasser- und Umwelttechnik GmbH Appareil de forage à marteau à percussion et procédé associé
WO2007062490A1 (fr) * 2005-12-02 2007-06-07 Sds Digger Tools Pty Ltd Moyen de commande par ecoulement de fluide pour marteau de fond de trou avec circulation inverse
WO2009066907A2 (fr) * 2007-11-19 2009-05-28 Core Geotechnics Co., Ltd. Corps de forage à marteau pneumatique pour induire efficacement une circulation inverse, et procédé de forage l'utilisant
WO2010071563A1 (fr) * 2008-12-18 2010-06-24 Sandvik Intellectual Property Ab Outil de forage pour forage à percussion dans la roche ; kit de complément, trépan annulaire et sabot de tubage

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1016657B (de) * 1956-10-24 1957-10-03 Wolfgang Herbold Dr Ing Tiefbohreinrichtung mit einer Wasserstrahlpumpe zur Foerderung des Bohrkleins durch das Bohrgestaenge
DE2854461A1 (de) 1978-12-16 1980-06-19 Hydroc Gmbh Ringbohrhammer
AT390303B (de) 1985-03-27 1990-04-25 Klemm Bohrtech Bohrvorrichtung
EP0692062B1 (fr) 1993-04-08 1999-06-16 Sandvik Aktiebolag Foreuse a percussion a circulation inversee et foret pour celle-ci
DE60207059T2 (de) * 2001-04-04 2006-07-27 Oy Atlas Copco Rotex Ab Bohrverfahren und bohrvorrichtung
WO2005031107A1 (fr) 2003-10-01 2005-04-07 Techmo Entwicklungs- Und Vertriebs Gmbh Procede et dispositif de forage dans de la terre ou de la pierre
KR20060106115A (ko) * 2005-04-06 2006-10-12 노승관 대구경 지반굴착 장치 및 방법
EP1731708A1 (fr) * 2005-06-10 2006-12-13 Geomechanik Wasser- und Umwelttechnik GmbH Appareil de forage à marteau à percussion et procédé associé
WO2007062490A1 (fr) * 2005-12-02 2007-06-07 Sds Digger Tools Pty Ltd Moyen de commande par ecoulement de fluide pour marteau de fond de trou avec circulation inverse
WO2009066907A2 (fr) * 2007-11-19 2009-05-28 Core Geotechnics Co., Ltd. Corps de forage à marteau pneumatique pour induire efficacement une circulation inverse, et procédé de forage l'utilisant
WO2010071563A1 (fr) * 2008-12-18 2010-06-24 Sandvik Intellectual Property Ab Outil de forage pour forage à percussion dans la roche ; kit de complément, trépan annulaire et sabot de tubage

Also Published As

Publication number Publication date
AT522402B1 (de) 2022-12-15
AT522402A1 (de) 2020-10-15

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