FR952325A - Trépan pour le forage de la roche - Google Patents

Trépan pour le forage de la roche

Info

Publication number
FR952325A
FR952325A FR952325DA FR952325A FR 952325 A FR952325 A FR 952325A FR 952325D A FR952325D A FR 952325DA FR 952325 A FR952325 A FR 952325A
Authority
FR
France
Prior art keywords
drill bit
rock drilling
rock
drilling
drill
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
English (en)
Inventor
Willy Fuchs
Ls Erich Hu
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.)
WALLRAM HARTMETALLWERK und HAR
Original Assignee
WALLRAM HARTMETALLWERK und HAR
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 WALLRAM HARTMETALLWERK und HAR filed Critical WALLRAM HARTMETALLWERK und HAR
Application granted granted Critical
Publication of FR952325A publication Critical patent/FR952325A/fr
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
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
FR952325D 1947-07-19 1947-07-19 Trépan pour le forage de la roche Expired FR952325A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR952325T 1947-07-19

Publications (1)

Publication Number Publication Date
FR952325A true FR952325A (fr) 1949-11-15

Family

ID=9486518

Family Applications (1)

Application Number Title Priority Date Filing Date
FR952325D Expired FR952325A (fr) 1947-07-19 1947-07-19 Trépan pour le forage de la roche

Country Status (1)

Country Link
FR (1) FR952325A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967491C (de) * 1951-05-01 1957-11-14 Seco Ltd Zweistufiger Gesteinsschlagbohrer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967491C (de) * 1951-05-01 1957-11-14 Seco Ltd Zweistufiger Gesteinsschlagbohrer

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