FR407421A - Witness cutting drilling tool - Google Patents

Witness cutting drilling tool

Info

Publication number
FR407421A
FR407421A FR407421DA FR407421A FR 407421 A FR407421 A FR 407421A FR 407421D A FR407421D A FR 407421DA FR 407421 A FR407421 A FR 407421A
Authority
FR
France
Prior art keywords
witness
drilling tool
cutting drilling
cutting
tool
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
Other languages
French (fr)
Inventor
Arnold Koepe
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
Application granted granted Critical
Publication of FR407421A publication Critical patent/FR407421A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
    • E21B25/10—Formed core retaining or severing means
FR407421D 1909-09-28 1909-09-28 Witness cutting drilling tool Expired FR407421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR407421T 1909-09-28

Publications (1)

Publication Number Publication Date
FR407421A true FR407421A (en) 1910-02-28

Family

ID=1451726

Family Applications (1)

Application Number Title Priority Date Filing Date
FR407421D Expired FR407421A (en) 1909-09-28 1909-09-28 Witness cutting drilling tool

Country Status (1)

Country Link
FR (1) FR407421A (en)

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