EP0199040B1 - Schlagbohrkrone für Gesteinsbohrmaschinen - Google Patents

Schlagbohrkrone für Gesteinsbohrmaschinen Download PDF

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Publication number
EP0199040B1
EP0199040B1 EP86103129A EP86103129A EP0199040B1 EP 0199040 B1 EP0199040 B1 EP 0199040B1 EP 86103129 A EP86103129 A EP 86103129A EP 86103129 A EP86103129 A EP 86103129A EP 0199040 B1 EP0199040 B1 EP 0199040B1
Authority
EP
European Patent Office
Prior art keywords
hammer drill
channels
front surface
crown bit
bit
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.)
Expired - Lifetime
Application number
EP86103129A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0199040A1 (de
Inventor
Siegfried Treitz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT86103129T priority Critical patent/ATE67557T1/de
Publication of EP0199040A1 publication Critical patent/EP0199040A1/de
Application granted granted Critical
Publication of EP0199040B1 publication Critical patent/EP0199040B1/de
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
    • 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
    • E21B10/003—Drill bits with cutting edges facing in opposite axial directions
    • 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts

Definitions

  • the invention relates to a percussion drill bit for rock drilling machines, the end face of which is covered with a large number of hard metal pins, several pins being combined to form a group, the groups thus formed being at least circumferentially spaced from one another and being separated from one another by fluid channels, and also as a fluid outlet at least one axial channel opening into the channels is provided, for example in the central region of the end face.
  • Such a drill bit is known for example from DE-A-27 33 300.
  • two-part drill bit, cutting inserts for example in the form of hard metal pins, are provided in groups, the groups being spaced apart from one another by means of fluid channels which run radially or are slightly curved in the direction of rotation.
  • the pins are arranged in a multiple arrangement on an island protruding from the fluid channels, so that larger chunks of cuttings can settle between the pins, which leads to a relatively long drilling time with appropriate propulsion, since these chunks first have to be ground down before they can pass through the fluid channels can be discharged to the outside through the fluid.
  • the fluid channels are used for exhaust gas routing and do not support the removal of the cuttings, which removal is only through the Exhaust gas is caused.
  • At least one axial channel opening into the fluid channels is provided as the fluid outlet, approximately in the central region of the end face.
  • larger chunks of cuttings are caught between the pins and have to be ground down first. Only when these constituents captured between the pins are ground small can they be at least partially transported away via the fluid channels with the support of the exhaust gas routing through central channels.
  • the drilling process itself is associated with a relatively large wear of the surfaces lying between the pins, which on the one hand leads to a longer drilling time and on the other hand to faster tool wear.
  • the invention has for its object to provide a hammer drill bit of the type described in the on the one hand there is a relatively simple possibility for regrinding, which on the other hand largely prevents larger chunks of cuttings from getting stuck between the pins and promotes the removal of the cuttings.
  • the groups each consist only of a series of pins which are arranged on molded webs, and that the webs are rotated by an angle opposite to the direction of rotation of the drill bit relative to the radius of the drill bit intersecting the central axis of the webs .
  • the removal of the drill cuttings is supported by the rotary movement of the drill bit, since the drill cuttings also without the exhaust gases, solely by the rotation the drill bit is conveyed radially outwards.
  • the webs are curved.
  • the fluid channels formed in the end face are designed to widen radially outward from the center of the crown. It is also proposed that the end face be conical.
  • the end face is curved.
  • channels are formed axially in the transition region between the end face and the shaft, into which the Fluid channels of the end face open.
  • the arrangement of axially extending channels in the transition region between the end face and the shaft is known, for example from DE-OS 26 33 779.
  • the special arrangement of the channels is particularly advantageous since there is now excellent transport between the channels in the end face and the axially extending channels.
  • the axial channels be displaced far into the crown body, partially crossing the front fluid channels and possibly partially crossing the webs.
  • the fact that the channels are moved as far as possible radially inward promotes particularly rapid removal of the cuttings.
  • the design according to the invention brings a higher performance without greater wear, so that the same drilling depth is achieved in a shorter time with less wear than is possible in the prior art.
  • Even the better one Grinding of the pins, in particular by simple means, is advantageous, whereby the arrangement of the pins means that the cut should be provided on the flanks of the pins that lie on the web side edges.
  • cut-back teeth pointing axially away from the end face are integrally formed between the axial channels.
  • the radially outermost pin of each web is arranged on a crown part formed by a cutting tooth.
  • more support material is arranged under the respective outer pin during the advance of the drill bit, so that the latter is not so much at risk of breakage.
  • the arrangement of the conically widening axial channels and the cutting teeth reduces the so-called "propeller wear".
  • a percussion drill bit is shown, which is provided with a grooved shaft (not shown), so that each is a left-handed embodiment.
  • the direction of rotation is indicated by the arrow A in FIGS. 2, 4 and 6.
  • the percussion drill bit for rock drilling machines has a large number of hard metal pins 1 in the end face, several pins 1 being combined to form a group of pins. These groups are spaced from each other. They are spatially separated from one another by fluid channels.
  • the fluid outlet for the exhaust gases from the drilling machine is approximately in the middle the end face an axial channel 3 opening into the channels 2 is provided.
  • the groups referred to above are each formed only from a series of pins 1 which are attached to molded webs 4.
  • the webs 4 are arranged inclined to the radius against the direction of rotation A of the drill bit.
  • the simplest embodiment is shown in Figures 1 and 2.
  • the webs 4 and the fluid channels 2 are both curved, the curvature running counter to the direction of rotation A of the drill bit.
  • the fluid channels 2 formed in the end face expand considerably radially outward from the center of the crown.
  • the end face of the percussion drill bit is designed in the shape of a truncated cone, whereas the end face in the exemplary embodiments according to FIGS. 3 to 6 is bulged outwards.
  • axially extending channels 6 are arranged in the transition area between the end face and shaft 5, into which the fluid channels 2 open.
  • the axial channels 6 are shifted as far as possible into the body of the drill bit, partly crossing the front fluid channels 2, but partly also the webs 4 (in particular in the embodiment according to FIGS. 5 + 6).
  • cut-back teeth 7 are formed between the axial channels 6 on the outside axially pointing away from the end face.
  • the rear incisors 7 are arranged on a crown base 8 tapering laterally and radially inward away from the end face.
  • the radially outermost pin of each web 4 is arranged on a crown part formed by a cutting tooth 7.
  • Two pins 1 are preferably arranged on each web 4. Depending on the course and arrangement of the webs, it can also be advantageous to arrange three pins 1 or only one pin 1 on a web 4.
  • the design according to the invention achieves a high drilling performance with relatively little wear, and a long service life of the drill bit with low energy consumption, since the cuttings leave the bottom of the borehole much coarser.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
EP86103129A 1985-03-20 1986-03-08 Schlagbohrkrone für Gesteinsbohrmaschinen Expired - Lifetime EP0199040B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86103129T ATE67557T1 (de) 1985-03-20 1986-03-08 Schlagbohrkrone fuer gesteinsbohrmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3510048A DE3510048C1 (de) 1985-03-20 1985-03-20 Schlagbohrkrone fuer Gesteinsbohrmaschinen
DE3510048 1985-03-20

Publications (2)

Publication Number Publication Date
EP0199040A1 EP0199040A1 (de) 1986-10-29
EP0199040B1 true EP0199040B1 (de) 1991-09-18

Family

ID=6265787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103129A Expired - Lifetime EP0199040B1 (de) 1985-03-20 1986-03-08 Schlagbohrkrone für Gesteinsbohrmaschinen

Country Status (12)

Country Link
US (1) US4771834A (ru)
EP (1) EP0199040B1 (ru)
JP (1) JPS62502269A (ru)
AT (1) ATE67557T1 (ru)
AU (1) AU584181B2 (ru)
BR (1) BR8607086A (ru)
DE (2) DE3510048C1 (ru)
FI (1) FI874076A (ru)
NO (1) NO864383D0 (ru)
OA (1) OA08663A (ru)
SU (1) SU1560061A3 (ru)
WO (1) WO1986005542A1 (ru)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104251121A (zh) * 2014-09-18 2014-12-31 武汉地大长江钻头有限公司 适用于石油勘探井可形成粗颗粒岩屑的pdc钻头

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4101458A1 (de) * 1991-01-19 1992-07-23 Wolf Thomas Fuer einen mit axialem druck und schlaegen arbeitenden, umlaufenden gesteinsbohrer bestimmter bohrmeissel
US6321862B1 (en) * 1997-09-08 2001-11-27 Baker Hughes Incorporated Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability
AT409404B (de) * 1998-02-09 2002-08-26 Knasmillner Rudolf Dipl Ing Schlagendes richtbohren
US6253864B1 (en) * 1998-08-10 2001-07-03 David R. Hall Percussive shearing drill bit
US7513319B2 (en) 2004-06-08 2009-04-07 Devall Donald L Reamer bit
US7228922B1 (en) 2004-06-08 2007-06-12 Devall Donald L Drill bit
US20090184564A1 (en) * 2008-01-22 2009-07-23 The William J. Brady Loving Trust Pcd percussion drill bit
US9103170B2 (en) * 2008-05-16 2015-08-11 Smith International, Inc. Impregnated drill bit
JP2012127062A (ja) * 2010-12-13 2012-07-05 Mitsubishi Materials Corp 掘削ビット
RU2535314C1 (ru) * 2013-07-16 2014-12-10 Федеральное государственное бюджетное учреждение науки Институт горного дела им. Н.А. Чинакала Сибирского отделения Российской академии наук Буровая коронка
EP2902583B1 (en) 2014-01-31 2017-04-12 Sandvik Intellectual Property AB Percussive rock drill bit with flushing grooves
JP6606848B2 (ja) * 2015-04-03 2019-11-20 三菱マテリアル株式会社 掘削工具
RU2649210C1 (ru) * 2017-01-24 2018-03-30 Федеральное государственное бюджетное учреждение науки Институт горного дела им. Н.А. Чинакала Сибирского отделения Российской академии наук Буровая коронка
RU2666386C1 (ru) * 2017-11-09 2018-09-07 Федеральное государственное бюджетное учреждение науки Институт горного дела им. Н.А. Чинакала Сибирского отделения Российской академии наук Буровая коронка
JP2022071528A (ja) * 2020-10-28 2022-05-16 Ｍｍｃリョウテック株式会社 掘削ビット

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121202A (en) * 1935-03-19 1938-06-21 Robert J Killgore Rotary bit
US2484365A (en) * 1947-10-27 1949-10-11 Charles E Seley Rock drill bit
US3145789A (en) * 1962-03-20 1964-08-25 Russell H Lawry Pilot rock drill
FR1515221A (fr) * 1967-01-19 1968-03-01 Forges Et Acieries Du Saut Du Taillant de mine
US3521716A (en) * 1968-10-16 1970-07-28 William F Fisher Drill point
US3583504A (en) * 1969-02-24 1971-06-08 Mission Mfg Co Gauge cutting bit
US3951220A (en) * 1974-08-19 1976-04-20 Vance Industries, Inc. Archimedes spiral drill bit
DE2528003A1 (de) * 1975-06-24 1977-01-20 Krupp Gmbh Gesteinsbohrer
US4096917A (en) * 1975-09-29 1978-06-27 Harris Jesse W Earth drilling knobby bit
DE2633779C3 (de) * 1976-07-28 1983-11-03 Richard 5383 Kierspe Karnebogen Schlagbohrkrone
DE2733300C2 (de) * 1977-07-21 1983-01-05 Western Rock Bit Co. Ltd., Calgary, Alberta Gesteinsbohrmeißel
DE2749613B2 (de) * 1977-11-05 1979-12-20 Fried. Krupp Gmbh, 4300 Essen Schlagbohrkrone für Gesteinsbohrungen
US4203496A (en) * 1978-10-16 1980-05-20 Smith International, Inc. Longitudinal axis roller drill bit with gage inserts protection
DE3113109C2 (de) * 1981-04-01 1983-11-17 Christensen, Inc., 84115 Salt Lake City, Utah Drehbohrmeißel für Tiefbohrungen
DE3225050A1 (de) * 1982-07-05 1984-01-05 Hilti AG, 9494 Schaan Gesteinsbohrer
DE3408225A1 (de) * 1984-03-07 1985-09-19 Richard 5383 Kierspe Karnebogen Schlagbohrkrone
DE8406901U1 (de) * 1984-03-07 1984-05-30 Karnebogen, Richard, 5383 Kierspe Schlagbohrkrone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104251121A (zh) * 2014-09-18 2014-12-31 武汉地大长江钻头有限公司 适用于石油勘探井可形成粗颗粒岩屑的pdc钻头

Also Published As

Publication number Publication date
JPS62502269A (ja) 1987-09-03
DE3510048C1 (de) 1986-04-10
FI874076A0 (fi) 1987-09-18
OA08663A (en) 1988-11-30
AU584181B2 (en) 1989-05-18
AU5582386A (en) 1986-10-13
NO864383L (no) 1986-11-03
DE3681482D1 (de) 1991-10-24
WO1986005542A1 (en) 1986-09-25
ATE67557T1 (de) 1991-10-15
US4771834A (en) 1988-09-20
EP0199040A1 (de) 1986-10-29
FI874076A (fi) 1987-09-18
NO864383D0 (no) 1986-11-03
BR8607086A (pt) 1988-01-19
SU1560061A3 (ru) 1990-04-23

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