DD40351A - - Google Patents

Info

Publication number
DD40351A
DD40351A DD8586665A DD8586665A DD40351A DD 40351 A DD40351 A DD 40351A DD 8586665 A DD8586665 A DD 8586665A DD 8586665 A DD8586665 A DD 8586665A DD 40351 A DD40351 A DD 40351A
Authority
DD
German Democratic Republic
Application number
DD8586665A
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 filed Critical
Priority to DD8586663 priority Critical
Publication of DD40351A publication Critical patent/DD40351A/xx

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58Chisel type inserts
DD8586665A 1963-06-14 1963-06-14 DD40351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DD8586663 1963-06-14

Publications (1)

Publication Number Publication Date
DD40351A true DD40351A (en) 1965-08-05

Family

ID=5477913

Family Applications (1)

Application Number Title Priority Date Filing Date
DD8586665A DD40351A (en) 1963-06-14 1963-06-14

Country Status (1)

Country Link
DD (1) DD40351A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2917664A1 (en) * 1979-05-02 1980-11-13 Christensen Inc A rotary drill bit for drilling deep
DE3113109A1 (en) * 1981-04-01 1982-11-04 Christensen Inc A rotary drill bit for drilling deep

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2917664A1 (en) * 1979-05-02 1980-11-13 Christensen Inc A rotary drill bit for drilling deep
DE3113109A1 (en) * 1981-04-01 1982-11-04 Christensen Inc A rotary drill bit for drilling deep

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