DE4110245A1 - Drehbohrkopf - Google Patents

Drehbohrkopf

Info

Publication number
DE4110245A1
DE4110245A1 DE19914110245 DE4110245A DE4110245A1 DE 4110245 A1 DE4110245 A1 DE 4110245A1 DE 19914110245 DE19914110245 DE 19914110245 DE 4110245 A DE4110245 A DE 4110245A DE 4110245 A1 DE4110245 A1 DE 4110245A1
Authority
DE
Germany
Prior art keywords
cutting edge
rotary drilling
drilling head
head according
main
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
DE19914110245
Other languages
German (de)
English (en)
Other versions
DE4110245C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
Ernst Heiderich
Reinhold Dipl Ing Walter
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.)
Element Six Holding GmbH
Original Assignee
Boart HWF GmbH and Co KG Hartmetallwerkzeugfabrik
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 Boart HWF GmbH and Co KG Hartmetallwerkzeugfabrik filed Critical Boart HWF GmbH and Co KG Hartmetallwerkzeugfabrik
Priority to DE19914110245 priority Critical patent/DE4110245A1/de
Publication of DE4110245A1 publication Critical patent/DE4110245A1/de
Application granted granted Critical
Publication of DE4110245C2 publication Critical patent/DE4110245C2/de
Granted legal-status Critical Current

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
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Drilling Tools (AREA)
DE19914110245 1991-03-28 1991-03-28 Drehbohrkopf Granted DE4110245A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19914110245 DE4110245A1 (de) 1991-03-28 1991-03-28 Drehbohrkopf

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914110245 DE4110245A1 (de) 1991-03-28 1991-03-28 Drehbohrkopf

Publications (2)

Publication Number Publication Date
DE4110245A1 true DE4110245A1 (de) 1992-10-01
DE4110245C2 DE4110245C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-01-14

Family

ID=6428427

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19914110245 Granted DE4110245A1 (de) 1991-03-28 1991-03-28 Drehbohrkopf

Country Status (1)

Country Link
DE (1) DE4110245A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5823640A (en) * 1994-08-22 1998-10-20 Robert Bosch Gmbh Method and device for driving an electromagnetic valve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1265613A (fr) * 1960-08-18 1961-06-30 Diamant Boart Sa Taillant pour forage de trous de mines et autres forages
DE3743480A1 (de) * 1986-12-29 1988-07-07 Boart Int Ltd Bohrmeissel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1265613A (fr) * 1960-08-18 1961-06-30 Diamant Boart Sa Taillant pour forage de trous de mines et autres forages
DE3743480A1 (de) * 1986-12-29 1988-07-07 Boart Int Ltd Bohrmeissel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5823640A (en) * 1994-08-22 1998-10-20 Robert Bosch Gmbh Method and device for driving an electromagnetic valve

Also Published As

Publication number Publication date
DE4110245C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-01-14

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: BARAT CARBIDE HOLDING GMBH, 36151 BURGHAUN, DE

8327 Change in the person/name/address of the patent owner

Owner name: ELEMENT SIX HOLDING GMBH, 36151 BURGHAUN, DE

8339 Ceased/non-payment of the annual fee