EP0739673A1 - Tube pour couronne - Google Patents

Tube pour couronne Download PDF

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Publication number
EP0739673A1
EP0739673A1 EP96105303A EP96105303A EP0739673A1 EP 0739673 A1 EP0739673 A1 EP 0739673A1 EP 96105303 A EP96105303 A EP 96105303A EP 96105303 A EP96105303 A EP 96105303A EP 0739673 A1 EP0739673 A1 EP 0739673A1
Authority
EP
European Patent Office
Prior art keywords
drill bit
tube
drill
tube according
segments
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
EP96105303A
Other languages
German (de)
English (en)
Other versions
EP0739673B1 (fr
Inventor
Wolfgang Peetz
Hans-Peter Dr. Meyen
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.)
Robert Bosch Power Tools GmbH
Original Assignee
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Hawera Probst 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 claimed from DE19602903A external-priority patent/DE19602903A1/de
Application filed by Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG, Hawera Probst GmbH filed Critical Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Publication of EP0739673A1 publication Critical patent/EP0739673A1/fr
Application granted granted Critical
Publication of EP0739673B1 publication Critical patent/EP0739673B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22—Rods or pipes with helical structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S408/00—Cutting by use of rotating axially moving tool
    • Y10S408/703—Trepanning
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/895—Having axial, core-receiving central portion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/895—Having axial, core-receiving central portion
    • Y10T408/8957—Having axial, core-receiving central portion and having stepped cutting edges

Definitions

  • the invention relates to a drill bit tube according to the preamble of claim 1.
  • Pipes for core bits are generally made from soft structural steel in the form of drawn precision tubes. These pipes are usually painted, in some cases also chromated. They have a uniformly round cross-section from the drill bit to the lid area. In the case of small drill bits, typically with pipe diameters that are smaller than 40 mm, thickenings with milled grooves are sometimes provided at the cutting end. These thickenings are necessary so that the drill segments can be attached with sufficient strength. The grooves in the thickened areas serve to absorb the drilling dust generated during drilling.
  • drill bits for dry drilling have become known which have mutually opposite bores which serve to remove the core located inside the drill bit after drilling.
  • Longitudinal slots up to the lid are sometimes also provided.
  • drilling dust is taken up in these longitudinal slots during drilling. They also serve, like the round holes mentioned, to remove the drill core located in the drill bit.
  • These longitudinal slots were only so-called for the dimension Can countersink (maximum drilling depth 70 mm) practicable.
  • Wet drill bits on the other hand, cannot have any breakthroughs, since otherwise there is a bypass in the flow of the flushing agent, which flows over the cover of the drill bit along the inside, past the drilling segments, to the outside.
  • DE 42 42 910 discloses a drill bit which has reinforcing ribs in the form of material reinforcements in order to improve the rigidity in the axial direction.
  • the attachment of such material reinforcements represents a significant additional effort in production.
  • the object of the invention is therefore to propose a tube for a drill bit, in which the friction during Drilling is reduced and at the same time the axial rigidity is improved, the drill bit being able to be produced at the same time with little effort, in particular by shaping processes.
  • a drill bit tube according to the invention has a structure on at least one lateral surface which stiffens the tube in the axial direction without additional material reinforcement.
  • the structure of such a structure has a large axis-parallel component in order to bring about this stiffening in the axial direction. Due to the structuring of the lateral surface, a closed cylindrical lateral surface no longer comes into contact with the wall of the borehole or the drill core. As a result, in addition to the improved rigidity of the drill bit tube, a reduced friction during drilling is achieved.
  • the advantages according to the invention are achieved solely by the shape and not by additional material reinforcements.
  • the wall thickness of the drill bit tube remains essentially unchanged due to the structures. Structures of this type can be produced using shaping processes with relatively little effort, for example from flat material or from smooth cylinder tubes.
  • the lateral surface structure is preferably applied in the form of impressions or indentations in the lateral surface.
  • impressions or indentations
  • Such impressions can be stamped into the tube sheet by means of a so-called roll rolling embossing before the sheet is formed into the drill bit tube and welded along the longitudinal seam.
  • embossing into continuously drawn cylindrical tubes would also be conceivable.
  • the impressions can be made in the form of grooves over the entire length of the tube and / or as self-contained impressions. Grooved impressions can take a straight course parallel to the axis or a curved or angular course.
  • the self-contained impressions can be circular, elliptical and polygonal.
  • the structure of the inner and / or outer lateral surface of the drill bit tube can be achieved in that the entire cross-sectional profile of the tube is designed differently from the cylindrical shape.
  • a profile tube can be composed of several, for example four, arcuate segments.
  • Cross sections are also available to be considered, in which the tube wall is arranged in a wave shape around a circular line.
  • cross-sectional profiles mentioned can be obtained in various ways. You can, for example, by joining individual pipe segments, by shaping or kinking a finished pipe, e.g. B. circular cross-section, or directly in the manufacture of the tube, for. B. be created by extrusion.
  • An additional advantage results from a twisting of the embossing or of the entire profile tube in the opposite direction to the direction of rotation, as described above.
  • the helix angle of such a pipe is, in contrast to a previously common spiral of drill bits, rather acute.
  • a typical slope is e.g. B. between 5 cm and 20 cm for a full revolution of the embossing or the cross section along the axial direction with drill bits with a circumference of up to about 60 mm.
  • the pitch or swirl angle should not be greater than 45 degrees.
  • targeted drilling dust is produced in the channels created by the twisting of the embossing or cross-sectional shape.
  • Another advantage of a special design of a drill bit which in particular can have a tube of the type mentioned above, is that instead of commercially available, curved and comparatively long drill segments at the drill end of the drill bit, shorter and straight drill segments can now be used.
  • the segments are arranged, for example, in the case of a profile tube with a polygonal or with a wave-shaped cross section, at the maximum or minimum deflections of the resulting circumferential lines. This results in a division of cuts between different drill segments. If the sequence between maximum and minimum deflections is suitably short, straight, short drill segments can be used without problems, which are typically only 10 - 15 mm long compared to a length of 20 mm - 30 mm in the case of a conventional drill bit design.
  • the main advantage of using short and straight drill segments is that the same segments can be used for drill bit tubes of different diameters. The larger number of identical components results in a considerable cost advantage. This advantage also arises in the case of drill bit tubes of the type known hitherto.
  • the drill bit tube 1 has an inner 2 and an outer 3 lateral surface.
  • the tube material is shaped so that diamond-shaped indentations 4 are distributed over the entire outer surface 3.
  • Each diamond-shaped bulge 4 is framed by a corresponding diamond-shaped depression 5.
  • the complementary image results on the inner lateral surface 2, i.e. diamond-shaped indentations 4 ', which are framed by corresponding diamond-shaped elevations 5', so that the material thickness remains essentially the same everywhere.
  • the diamond-shaped depressions 5 result in continuous intersecting channels, as illustrated by dashed lines 6, 7, for example.
  • These continuous channels 6, 7 run parallel to the side walls of the diamond-shaped indentations 4 in a helical manner with a large slope around the outer circumference of the drill bit tube 1.
  • the pitch angle ⁇ is 45 °, for example.
  • the diamond-shaped indentations 4 are aligned with their one diagonal parallel to the axis 8 of the drill bit tube 1.
  • drilling segments 20 are attached, which are shaped like a segment of a circle.
  • FIGS. 3 and 4 the alternating sequence of elevations 9 and depressions 10 along the circumference of the drill bit tube 1 is illustrated.
  • the inner lateral surface 2 is designed to be complementary to the outer lateral surface 3.
  • the improved wall rigidity and the reduced friction due to the smaller friction surface with the drilling wall which in the present case is formed by the surface of the elevations 9, are achieved by the helically surrounding channels 6 and 7 added advantage.
  • These helical channels 6 and 7 improve the removal of the drilling dust when the drill bit is turned.
  • the illustration of the flat development 1 'of the drill bit tube 1 shows how such a tube 1 can be manufactured from flat material.
  • Roll embossing can be used, for example, to emboss a sheet so that it receives the profile of the development 1 '.
  • the drill bit tube is then e.g. produced by winding and welding.
  • FIGS. 6 - 7 relate to an embodiment in which the cross-section deviating from the cylindrical shape according to the invention is realized by trough-shaped grooves 11 of round cross-section.
  • the circular cross section 12 of these grooves 11 can be clearly seen on the end face (see FIGS. 6 and 8). It is also clear here that no material reinforcements have been made.
  • the drill bit tube 1 or parts thereof can be produced by molding.
  • grooves 11 are formed in the drill bit tube 1. This results in four round wall segments 13 between the grooves 11.
  • the grooves 11 are formed in the wall of the drill bit tube 1 in such a way that they have a slight swirl. In particular in Fig. 7 it can be seen that the pitch angle angle ⁇ is kept very sharp. This arrangement of the grooves 11 with an acute angle of inclination angle ⁇ reinforces the stiffening of the tube wall in the axial direction.
  • the grooves 11 in the inner lateral surface 2 represent elevations.
  • drilling takes place between an inner 14 and an outer 15 circular envelope, as can be seen in the front view of FIG. 8.
  • the wall segments 13 rest only on their outermost elevations 16 on the drilling wall.
  • the core in the interior of such a drill bit tube 1 is only touched by the grooves 11. This results in a significantly reduced friction, as already explained several times.
  • FIGS. 9-11 is constructed similarly to the embodiment described above. Instead of the grooves 11, however, there are flat connecting edges 17 which are formed by kinking and on which four wall segments 13 in the form of segments of a circle are joined to one another.
  • the course of the circumference of a drill bit tube designed in this way has four points of maximum diameter in the region of the center of the wall segments 13 and four positions of minimum diameter in the region of the connecting edges 17.
  • the described embodiment of the drill bit tube 1 can also consist of a different number of wall segments 13. Three wall segments as well as five or an even larger number would be conceivable.
  • the grooves 11 have a slight swirl in the present example in the opposite direction to the direction of rotation of the drill bit.
  • the angle of inclination angle ⁇ is again kept very acute. This in turn results in increased wall rigidity of the drill bit tube 1, as in the previous exemplary embodiments.
  • the central regions of the wall segments 13 form the regions which are at the greatest distance from the axis of rotation of the drill bit tube and thus rub against the drilling wall during drilling.
  • these outermost elevations move along an outer envelope curve 15 which is shown in FIG Fig. 10 is visible as an outer contour due to the existing swirl within the drill bit tube 1.
  • the inner envelope curve 14 is traversed by the edges 17 during drilling. In the region of the edges 17, channels are formed between the outer lateral surface 3 and the wall of the borehole, through which the drilling dust can be removed.
  • FIGS. 12 to 14 an exemplary embodiment of a drill bit tube 1 according to the invention is shown, in which the outer 3 and the inner 2 lateral surface runs in a wave shape along the circumference of a circular cylinder by a corresponding shaping of the tube wall.
  • Short drill segments 21 are attached at locations of maximum 22 or minimum distance 23 from the central axis of the drill bit tube 1.
  • the short drilling segments 21 are no longer curved, but straight.
  • the periods of the wave structure are so short that a sufficiently large number of the short and straight drilling segments 21 can be attached at a minimum distance 23 or maximum distance 22 in order to achieve a sufficient drilling result.
  • the wave-shaped configuration of the drill bit tube 1 results in an axial stiffening, as in all previous embodiments. Likewise, the friction of the drill bit tube 1 in the borehole is reduced, since this can only bear against the wall of the borehole or the drill core at the points with a minimum 23 or maximum 22 distance from the axis of the drill bit tube.
  • a stiffening structure is molded into at least one of the lateral surfaces of the drill bit tube 1.
  • These stiffening structures can either be completely aligned in the axial direction or so deflected from the axial direction that the stiffening effect is retained in the axial direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)
EP96105303A 1995-04-27 1996-04-03 Tube pour couronne Expired - Lifetime EP0739673B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19515435 1995-04-27
DE19515435 1995-04-27
DE19602903A DE19602903A1 (de) 1995-04-27 1996-01-27 Bohrkronenrohr
DE19602903 1996-01-27

Publications (2)

Publication Number Publication Date
EP0739673A1 true EP0739673A1 (fr) 1996-10-30
EP0739673B1 EP0739673B1 (fr) 1998-12-23

Family

ID=26014667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96105303A Expired - Lifetime EP0739673B1 (fr) 1995-04-27 1996-04-03 Tube pour couronne

Country Status (3)

Country Link
US (1) US5676501A (fr)
EP (1) EP0739673B1 (fr)
JP (1) JPH08303171A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844055A1 (fr) * 1996-11-26 1998-05-27 HILTI Aktiengesellschaft Scie tubulaire dont le corps consiste de deux tubes coaxiaux
CN103660044A (zh) * 2013-12-03 2014-03-26 常州深倍超硬材料有限公司 具有冷却结构的组合刀具
CN105437391A (zh) * 2014-08-27 2016-03-30 兆远科技股份有限公司 钻取装置及高硬度材质的曲面基板的制造方法
EP3184216A1 (fr) * 2015-12-22 2017-06-28 HILTI Aktiengesellschaft Couronne de forage comprenant une tige de forage ondulée
EP3501706A1 (fr) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Procédé de fabrication d'une section de coupe pour une couronne de forage
EP3501703A1 (fr) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Procédé de fabrication d'une section de coupe pour une couronne de forage
EP3501709A1 (fr) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Section de coupe pour une couronne de forage
EP3501712A1 (fr) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Procédé de fabrication d'une section de coupe pour une couronne de forage
CN110035854A (zh) * 2016-12-23 2019-07-19 喜利得股份公司 具有螺旋管状的钻杆的钻头和用于制造用于钻头的螺旋管状的钻杆的方法
CN110035853A (zh) * 2016-12-23 2019-07-19 喜利得股份公司 具有螺旋管状的钻杆的钻头和用于制造用于钻头的螺旋管状的钻杆的方法
CN110821414A (zh) * 2019-11-26 2020-02-21 山东益矿钻采科技有限公司 一种耐磨防滑钻杆

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JP4482775B2 (ja) * 2000-02-22 2010-06-16 鉱研工業株式会社 ロータリパーカッションドリル用ワイヤラインコア採取装置
GB2366754A (en) * 2000-09-16 2002-03-20 Marcrist Internat Ltd Rotary cutting or grinding tool
JP3698141B2 (ja) * 2002-01-18 2005-09-21 マックス株式会社 コアドリル
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NL1023005C2 (nl) * 2002-11-12 2004-05-13 Stork Prints Bv Zeefmateriaal, werkwijze voor de vervaardiging en toepassingen daarvan.
JP4217808B2 (ja) * 2003-05-19 2009-02-04 株式会社ミスミ特殊 コアドリル
USD527233S1 (en) 2004-08-23 2006-08-29 Irwin Industrial Tool Company Colored reciprocating saw blade
WO2006076795A1 (fr) * 2005-01-18 2006-07-27 Groupe Fordia Inc Meche pour percer un trou
JP4660836B2 (ja) * 2005-02-04 2011-03-30 株式会社ミスミ特殊 コアドリル
US7658576B1 (en) * 2007-08-02 2010-02-09 Mirko Buzdum Hole saw having efficient slug removal
US7614978B2 (en) * 2007-12-20 2009-11-10 Gary D. Piaget Stair climbing exercise apparatus with improved bellows
IT1391943B1 (it) * 2008-11-14 2012-02-02 Atlas Copco Blm Srl Dispositivo perfezionato ad elementi sostituibili per la taratura di avvitatori
US7818867B1 (en) * 2009-05-27 2010-10-26 Capstran Richard E Method of treating a hole saw to provide efficient slug removal
US20110027030A1 (en) * 2009-05-27 2011-02-03 Cappy's Concepts Llc. Treated hole saw having efficient slug removal
DE102009039170B4 (de) * 2009-08-27 2022-01-20 Kennametal Inc. Bohrwerkzeug
US9586270B2 (en) * 2010-01-13 2017-03-07 Irwin Industrial Tool Company Coated hole cutter
US9782839B2 (en) 2010-01-13 2017-10-10 Irwin Industrial Tool Company Hole cutter with chip egress aperture
US9808869B2 (en) 2010-01-13 2017-11-07 Irwin Industrial Tool Company Hole cutter with chip egress aperture
US9884374B2 (en) 2015-09-03 2018-02-06 Irwin Industrial Tool Company Hole cutter with multiple fulcrums
USD690334S1 (en) 2010-01-13 2013-09-24 Irwin Industrial Tool Company Hole saw
US10137507B2 (en) 2010-01-13 2018-11-27 Irwin Industrial Tool Company Hole cutter with multiple fulcrums
US9724766B2 (en) 2010-01-13 2017-08-08 Irwin Industrial Tool Company Hole cutter with multiple fulcrums
JP2013155496A (ja) * 2012-01-27 2013-08-15 Giken Seisakusho Co Ltd 回転切削用円筒体
JP6148499B2 (ja) * 2013-03-01 2017-06-14 五洋建設株式会社 鋼管矢板圧入装置
KR101692224B1 (ko) * 2016-09-13 2017-01-03 황광모 수동 굴착기기
EP3338934A1 (fr) * 2016-12-23 2018-06-27 HILTI Aktiengesellschaft Procédé de production d'une tige de forage pour une couronne de forage humide
USD845362S1 (en) 2017-12-04 2019-04-09 Black & Decker Inc. Holesaw
DE202019101214U1 (de) * 2019-03-04 2019-09-05 C. & E. Fein Gmbh Werkzeugeinrichtung für eine Werkzeugmaschine
USD1081739S1 (en) * 2021-04-06 2025-07-01 Altria Client Services Llc Die for gum forming

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844055A1 (fr) * 1996-11-26 1998-05-27 HILTI Aktiengesellschaft Scie tubulaire dont le corps consiste de deux tubes coaxiaux
US5980168A (en) * 1996-11-26 1999-11-09 Hilti Aktiengesellschaft Hollow crown drill
CN103660044A (zh) * 2013-12-03 2014-03-26 常州深倍超硬材料有限公司 具有冷却结构的组合刀具
CN103660044B (zh) * 2013-12-03 2015-11-18 常州深倍超硬材料有限公司 具有冷却结构的组合刀具
CN105437391A (zh) * 2014-08-27 2016-03-30 兆远科技股份有限公司 钻取装置及高硬度材质的曲面基板的制造方法
EP3184216A1 (fr) * 2015-12-22 2017-06-28 HILTI Aktiengesellschaft Couronne de forage comprenant une tige de forage ondulée
WO2017108461A1 (fr) * 2015-12-22 2017-06-29 Hilti Aktiengesellschaft Couronne de forage pourvue d'un corps de forage ondulé
CN110035854A (zh) * 2016-12-23 2019-07-19 喜利得股份公司 具有螺旋管状的钻杆的钻头和用于制造用于钻头的螺旋管状的钻杆的方法
CN110035853A (zh) * 2016-12-23 2019-07-19 喜利得股份公司 具有螺旋管状的钻杆的钻头和用于制造用于钻头的螺旋管状的钻杆的方法
CN110035854B (zh) * 2016-12-23 2020-09-15 喜利得股份公司 具有螺旋管状的钻杆的钻头和用于制造用于钻头的螺旋管状的钻杆的方法
CN110035853B (zh) * 2016-12-23 2020-09-15 喜利得股份公司 钻头和用于制造用于钻头的钻杆的方法
EP3501703A1 (fr) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Procédé de fabrication d'une section de coupe pour une couronne de forage
EP3501709A1 (fr) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Section de coupe pour une couronne de forage
EP3501712A1 (fr) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Procédé de fabrication d'une section de coupe pour une couronne de forage
WO2019121470A1 (fr) * 2017-12-21 2019-06-27 Hilti Aktiengesellschaft Segment de coupe pour une couronne de forage
WO2019121472A1 (fr) * 2017-12-21 2019-06-27 Hilti Aktiengesellschaft Procédé de fabrication d'un segment de coupe pour une couronne de forage
WO2019121475A1 (fr) * 2017-12-21 2019-06-27 Hilti Aktiengesellschaft Procédé de fabrication d'un segment de coupe pour une couronne de forage
WO2019121140A1 (fr) * 2017-12-21 2019-06-27 Hilti Aktiengesellschaft Procédé de fabrication d'une section de découpage pour une couronne de carottage
EP3501706A1 (fr) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Procédé de fabrication d'une section de coupe pour une couronne de forage
CN110821414A (zh) * 2019-11-26 2020-02-21 山东益矿钻采科技有限公司 一种耐磨防滑钻杆

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US5676501A (en) 1997-10-14
EP0739673B1 (fr) 1998-12-23

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