EP2740884B1 - Steinbohrspitze und Steinbohrer - Google Patents

Steinbohrspitze und Steinbohrer Download PDF

Info

Publication number
EP2740884B1
EP2740884B1 EP12195889.6A EP12195889A EP2740884B1 EP 2740884 B1 EP2740884 B1 EP 2740884B1 EP 12195889 A EP12195889 A EP 12195889A EP 2740884 B1 EP2740884 B1 EP 2740884B1
Authority
EP
European Patent Office
Prior art keywords
tip
mounting portion
recess
set forth
tips
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.)
Not-in-force
Application number
EP12195889.6A
Other languages
English (en)
French (fr)
Other versions
EP2740884A1 (de
Inventor
Karl-Oskar Finnman
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.)
Sandvik Intellectual Property AB
Original Assignee
Sandvik Intellectual Property AB
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=47294777&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2740884(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sandvik Intellectual Property AB filed Critical Sandvik Intellectual Property AB
Priority to EP12195889.6A priority Critical patent/EP2740884B1/de
Priority to CN201380059999.0A priority patent/CN104854299A/zh
Priority to RU2015126798A priority patent/RU2015126798A/ru
Priority to PE2015000737A priority patent/PE20151099A1/es
Priority to BR112015013113A priority patent/BR112015013113A2/pt
Priority to CA2888912A priority patent/CA2888912A1/en
Priority to US14/649,589 priority patent/US20150308199A1/en
Priority to PCT/EP2013/074734 priority patent/WO2014086620A1/en
Priority to MX2015006959A priority patent/MX2015006959A/es
Priority to AU2013354372A priority patent/AU2013354372A1/en
Publication of EP2740884A1 publication Critical patent/EP2740884A1/de
Publication of EP2740884B1 publication Critical patent/EP2740884B1/de
Application granted granted Critical
Priority to ZA2015/03945A priority patent/ZA201503945B/en
Priority to CL2015001560A priority patent/CL2015001560A1/es
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/16—Roller bits characterised by tooth form or arrangement
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/573—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element
    • E21B10/5735—Interface between the substrate and the cutting element
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/573—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
    • E21C35/1831—Fixing methods or devices

Definitions

  • the present disclosure relates to tips in rock or mining bits for use in a rock excavation apparatus.
  • the disclosure particularly relates to tips with hollow bases.
  • Rotary drilling is conducted by rotating a rigid string of tubular rods to which a rock-cutting bit is attached.
  • the rotary drill imparts two basic actions through the drill rod and bit into the rock, i.e. axial thrust and rotational torque.
  • Percussive drills break rock predominantly by crushing and chipping rock with the repeated application of high-frequency, high-energy blows through a drill bit.
  • the impact energy is developed by a piston that strikes the bit (down-the-hole drill) or drill steel (surface-mounted drill).
  • tips are often made of cemented carbide, most commonly tungsten carbide, due to its excellent combination of high hardness and high toughness.
  • the tips can also be made of polycrystalline diamond (PCD).
  • PCD polycrystalline diamond
  • the purpose of the tips is mainly to apply pressure to and fracture rock.
  • tips are also positioned on the drill bit body as protection for the surrounding steel. The tips must therefore withstand high compressive and transverse loads.
  • the tungsten carbide tips are commonly mounted in cylindrical recesses in the outer surface of the drill bit body.
  • the tips can be made a few hundredths of a mm larger than the recess and are pressed in to have a tight interference fit to prevent loosening during usage.
  • Tungsten carbide tips are also used for soft cutting conditions such as excavation of coal.
  • the tips are, in this application, often named caps and are often adhesively bonded to a pick body by, for example, brazing or welding.
  • tungsten carbide tips such as a part-spherical, conical, a double cone, a ballistic and a chisel crest. Common for these different shapes is that the base, also called mounting portion, of the tip is generally cylindrical.
  • tips having a diameter of about 2 cm or larger In many applications it is advantageous to use tips having a diameter of about 2 cm or larger.
  • the advantages being that fewer tips need to be used and also that the protrusion of the tip from the surface of the bit body can be greater while maintaining adequate strength to avoid transverse failure during the excavation operation. Having large tips concentrates the load to fewer tips and greater rock penetration can be obtained without engagement of the steel surface, resulting in improved excavation rate. Having large tips that extend a greater distance from the bit also increases the lifetime of the bit as the large tips can accommodate appreciable wear before they are worn out.
  • the present inventor has surprisingly found that several prominent problems occur at tips with hollow bases.
  • One is that the base of the tip tends to get oval in shape.
  • Another problem is that the form of the tip tends to get conical, i.e. the diameter of the mounting portion decreases when approaching the very bottom of the tip. Ovality and conicity in the mounting portion decreases the force for pulling the tip from the drill bit body and therefore loosening of the tip is an unfavorable consequence.
  • the mounting portion may crack when a tip is press fitted into a recess in the drill bit body.
  • One object of the present invention is to provide a hollow tip concept, which has better strength than known hollow tips. Another object is to provide a hollow tip concept which can be produced at a lower cost compared to solid tips, thus solving the above mentioned problems.
  • a rock bit tip comprising: a mounting portion, an end portion converging from a top end of the mounting portion to form a work surface and at least one recess in a bottom of the mounting portion, the recess extending towards said end portion, wherein there are more than one recess.
  • a rock bit comprising a tip with more than one recess.
  • the number of recesses, and their sizes, may be altered compared to the examples described in the above-captioned embodiments. It is also possible to combine recesses with different sizes and shapes into a new embodiment. The depth of the recesses can also be varied, but the recesses are always of the blind hole type.

Claims (11)

  1. Gesteinsmeißelspitze welche aufweist:
    einen Befestigungsabschnitt (12; 112; 122; 132; 142; 152), einen Endabschnitt (11), der vom oberen Ende des Befestigungsabschnittes aus konvergiert um eine Arbeitsoberfläche zu bilden, und zumindest eine Aussparung (115; 125; 135; 145; 155) in einer Unterseite (14; 114; 124; 134; 144; 154) des Befestigungsabschnittes, wobei die Aussparung sich in Richtung des Endabschnittes erstreckt,
    dadurch gekennzeichnet, dass mehr als eine Aussparung vorgesehen ist.
  2. Spitze nach Anspruch 1, wobei die Aussparungen durch eine Halterungsstruktur (116; 126; 136; 146; 156) von einander beabstandet sind, wobei die Halterungsstruktur mit dem Befestigungsabschnitt und dem Endabschnitt einstückig ausgebildet ist.
  3. Spitze nach Anspruch 1 oder 2, wobei zumindest eine Aussparung (157) einen Querschnitt parallel zum Boden des Befestigungsabschnittes und zwischen einem Boden des Befestigungsabschnittes und dem Endabschnitt aufweist, dessen geometrisches Zentrum (B) von der Längsmittelachse (A) der Spitze getrennt ist.
  4. Spitze nach Anspruch 1, 2 oder 3, wobei zumindest eine Aussparung (115) einen Querschnitt am Boden des Befestigungsabschnittes und parallel zum Boden des Befestigungsabschnittes hat, der in etwa einem Kreissektor entspricht.
  5. Spitze nach Anspruch 1, 2 oder 3, wobei zumindest eine Aussparung (125) am Boden des Befestigungsabschnittes und parallel zum Boden des Befestigungsabschnittes einen Querschnitt hat, welcher in etwa einem gekappten Kreisring entspricht.
  6. Spitze nach Anspruch 1, 2 oder 3, wobei zumindest eine Aussparung (135) am Boden des Befestigungsabschnittes und parallel zu dem Boden des Befestigungsabschnittes einen Querschnitt hat, der in etwa hexagonal ist.
  7. Spitze nach Anspruch 1, 2 oder 3, wobei zumindest eine Aussparung (145) am Boden des Befestigungsabschnittes und parallel zu dem Boden des Befestigungsabschnittes einen Querschnitt hat, der in etwa kreisförmig ist.
  8. Spitze nach einem der vorstehenden Ansprüche, wobei die Spitze Sintercarbid und/oder polykristallinen Diamant aufweist.
  9. Spitze nach Anspruch 8, wobei die Spitze Wolframcarbid aufweist.
  10. Bohrmeißel, dadurch gekennzeichnet, dass er eine Spitze (10; 110; 120; 130; 140; 150) nach einem der vorstehenden Ansprüche 1 bis 9 aufweist.
  11. Bohrmeißel nach Anspruch 10, wobei der Bohrmeißel ein Meißel für das drehende Bohren, für das Hammer- bzw. Schlagbohren oder eine Abbaupicke ist.
EP12195889.6A 2012-12-06 2012-12-06 Steinbohrspitze und Steinbohrer Not-in-force EP2740884B1 (de)

Priority Applications (12)

Application Number Priority Date Filing Date Title
EP12195889.6A EP2740884B1 (de) 2012-12-06 2012-12-06 Steinbohrspitze und Steinbohrer
US14/649,589 US20150308199A1 (en) 2012-12-06 2013-11-26 Rock bit tip and rock bit
MX2015006959A MX2015006959A (es) 2012-12-06 2013-11-26 Punta de barrena para roca y barrena para roca.
PE2015000737A PE20151099A1 (es) 2012-12-06 2013-11-26 Punta de barrena para roca y barrena para roca
BR112015013113A BR112015013113A2 (pt) 2012-12-06 2013-11-26 ponta de broca para escavação de rocha e broca para rocha
CA2888912A CA2888912A1 (en) 2012-12-06 2013-11-26 Rock bit tip and rock bit
CN201380059999.0A CN104854299A (zh) 2012-12-06 2013-11-26 岩石钻头钻尖和岩石钻头
PCT/EP2013/074734 WO2014086620A1 (en) 2012-12-06 2013-11-26 Rock bit tip and rock bit
RU2015126798A RU2015126798A (ru) 2012-12-06 2013-11-26 Штырь долота для твердых пород и долото для твердых пород
AU2013354372A AU2013354372A1 (en) 2012-12-06 2013-11-26 Rock bit tip and rock bit
ZA2015/03945A ZA201503945B (en) 2012-12-06 2015-06-02 Rock bit tip and rock bit
CL2015001560A CL2015001560A1 (es) 2012-12-06 2015-06-05 Punta de barrena para roca que comprende, una parte de montaje, una parte de extremo que converge desde un extremo superior de la parte de montaje para formar una superficie de trabajo y al menos un rebaje en una parte inferior de la parte de montaje; y barrena para roca.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12195889.6A EP2740884B1 (de) 2012-12-06 2012-12-06 Steinbohrspitze und Steinbohrer

Publications (2)

Publication Number Publication Date
EP2740884A1 EP2740884A1 (de) 2014-06-11
EP2740884B1 true EP2740884B1 (de) 2015-02-25

Family

ID=47294777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12195889.6A Not-in-force EP2740884B1 (de) 2012-12-06 2012-12-06 Steinbohrspitze und Steinbohrer

Country Status (12)

Country Link
US (1) US20150308199A1 (de)
EP (1) EP2740884B1 (de)
CN (1) CN104854299A (de)
AU (1) AU2013354372A1 (de)
BR (1) BR112015013113A2 (de)
CA (1) CA2888912A1 (de)
CL (1) CL2015001560A1 (de)
MX (1) MX2015006959A (de)
PE (1) PE20151099A1 (de)
RU (1) RU2015126798A (de)
WO (1) WO2014086620A1 (de)
ZA (1) ZA201503945B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190178080A1 (en) * 2014-04-02 2019-06-13 The Sollami Company Diamond insert with heat transfer bore
CA2974075A1 (en) * 2016-08-09 2018-02-09 Varel International Ind., L.P. Durable rock bit for blast hole drilling
CN108687353B (zh) * 2018-06-20 2019-06-18 深圳市海明润超硬材料股份有限公司 一种金刚石复合片及制备方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3388757A (en) * 1967-03-23 1968-06-18 Smith Ind International Inc Hardened inserts for drill bits
US4150728A (en) 1976-11-26 1979-04-24 Smith International, Inc. Rock drill bit inserts with hollow bases
US4176725A (en) * 1978-08-17 1979-12-04 Dresser Industries, Inc. Earth boring cutting element enhanced retention system
US4654947A (en) * 1985-12-02 1987-04-07 W. Wesley Perry Drill bit and method of renewing drill bit cutting face
US4940288A (en) * 1988-07-20 1990-07-10 Kennametal Inc. Earth engaging cutter bit
US4893875A (en) * 1988-12-16 1990-01-16 Caterpillar Inc. Ground engaging bit having a hardened tip
US5374111A (en) * 1993-04-26 1994-12-20 Kennametal Inc. Extraction undercut for flanged bits
CA2314114C (en) 1999-07-19 2007-04-10 Smith International, Inc. Improved rock drill bit with neck protection
US20050146199A1 (en) * 2004-01-05 2005-07-07 Wen-Chin Lee Rotatable cutting tool for breaking hard material
SE530135C2 (sv) 2004-09-21 2008-03-11 Sandvik Intellectual Property Bergborrkrona anpassad för slående borrning
US7703559B2 (en) * 2006-05-30 2010-04-27 Smith International, Inc. Rolling cutter
US7992944B2 (en) * 2006-08-11 2011-08-09 Schlumberger Technology Corporation Manually rotatable tool
US8500209B2 (en) * 2006-08-11 2013-08-06 Schlumberger Technology Corporation Manually rotatable tool
US8118371B2 (en) * 2006-08-11 2012-02-21 Schlumberger Technology Corporation Resilient pick shank
US8210618B2 (en) * 2007-08-23 2012-07-03 Sandvik Intellectual Property Ab Reduced volume cutting tip and cutter bit assembly incorporating same
US8701799B2 (en) * 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
WO2010144837A2 (en) * 2009-06-12 2010-12-16 Smith International, Inc. Cutter assemblies, downhole tools incorporating such cutter assemblies and methods of making such downhole tools

Also Published As

Publication number Publication date
RU2015126798A (ru) 2017-01-13
EP2740884A1 (de) 2014-06-11
CN104854299A (zh) 2015-08-19
AU2013354372A1 (en) 2015-05-14
CA2888912A1 (en) 2014-06-12
ZA201503945B (en) 2017-11-29
PE20151099A1 (es) 2015-08-06
MX2015006959A (es) 2015-09-08
WO2014086620A1 (en) 2014-06-12
US20150308199A1 (en) 2015-10-29
BR112015013113A2 (pt) 2017-07-11
CL2015001560A1 (es) 2015-08-28

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