DE3421171C2 - - Google Patents

Info

Publication number
DE3421171C2
DE3421171C2 DE19843421171 DE3421171A DE3421171C2 DE 3421171 C2 DE3421171 C2 DE 3421171C2 DE 19843421171 DE19843421171 DE 19843421171 DE 3421171 A DE3421171 A DE 3421171A DE 3421171 C2 DE3421171 C2 DE 3421171C2
Authority
DE
Germany
Prior art keywords
spherical
drill
head arm
drill bit
drill head
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
Application number
DE19843421171
Other languages
German (de)
English (en)
Other versions
DE3421171A1 (de
Inventor
Wolfgang 4320 Hattingen De Niederhagemann
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.)
MASCHINENFABRIK JOSEPH EICH KG 4320 HATTINGEN DE
Original Assignee
MASCHINENFABRIK JOSEPH EICH KG 4320 HATTINGEN DE
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 MASCHINENFABRIK JOSEPH EICH KG 4320 HATTINGEN DE filed Critical MASCHINENFABRIK JOSEPH EICH KG 4320 HATTINGEN DE
Priority to DE19843421171 priority Critical patent/DE3421171A1/de
Publication of DE3421171A1 publication Critical patent/DE3421171A1/de
Application granted granted Critical
Publication of DE3421171C2 publication Critical patent/DE3421171C2/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
    • E21B10/08—Roller bits
    • E21B10/20—Roller bits characterised by detachable or adjustable parts, e.g. legs or axles
    • 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
    • E21B10/08—Roller bits
    • E21B10/22—Roller bits characterised by bearing, lubrication or sealing details

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)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
DE19843421171 1984-06-07 1984-06-07 Tiefbohrmeissel Granted DE3421171A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19843421171 DE3421171A1 (de) 1984-06-07 1984-06-07 Tiefbohrmeissel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843421171 DE3421171A1 (de) 1984-06-07 1984-06-07 Tiefbohrmeissel

Publications (2)

Publication Number Publication Date
DE3421171A1 DE3421171A1 (de) 1986-06-26
DE3421171C2 true DE3421171C2 (fr) 1987-07-23

Family

ID=6237805

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843421171 Granted DE3421171A1 (de) 1984-06-07 1984-06-07 Tiefbohrmeissel

Country Status (1)

Country Link
DE (1) DE3421171A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762189A (en) * 1987-05-28 1988-08-09 Tatum David M Seal and seal shield assembly for rotary drill bits

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1762504A (en) * 1927-08-15 1930-06-10 Reed Roller Bit Co Roller bit
US1729062A (en) * 1927-08-15 1929-09-24 Reed Roller Bit Co Roller-cutter mounting
US2221242A (en) * 1939-01-28 1940-11-12 I H Lyons Drill
US3047344A (en) * 1959-04-07 1962-07-31 Neyrpic Ets Drilling tools for turbine drills

Also Published As

Publication number Publication date
DE3421171A1 (de) 1986-06-26

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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
8339 Ceased/non-payment of the annual fee