CH387573A - Poll crown - Google Patents

Poll crown

Info

Publication number
CH387573A
CH387573A CH1353762A CH1353762A CH387573A CH 387573 A CH387573 A CH 387573A CH 1353762 A CH1353762 A CH 1353762A CH 1353762 A CH1353762 A CH 1353762A CH 387573 A CH387573 A CH 387573A
Authority
CH
Switzerland
Prior art keywords
poll
crown
poll crown
Prior art date
Application number
CH1353762A
Other languages
French (fr)
Inventor
Renard Jan
Original Assignee
Diamant Boart Sa
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 Diamant Boart Sa filed Critical Diamant Boart Sa
Publication of CH387573A publication Critical patent/CH387573A/en

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
    • E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type

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)
CH1353762A 1961-12-11 1962-11-19 Poll crown CH387573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE487483 1961-12-11

Publications (1)

Publication Number Publication Date
CH387573A true CH387573A (en) 1965-02-15

Family

ID=3844628

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1353762A CH387573A (en) 1961-12-11 1962-11-19 Poll crown

Country Status (2)

Country Link
CH (1) CH387573A (en)
GB (1) GB986170A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104131783B (en) * 2014-08-18 2016-06-15 中国地质大学（武汉） A kind of carcass lip face is the diamond head of wedge shape

Also Published As

Publication number Publication date
GB986170A (en) 1965-03-17

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