FR642294A - Improvements in mining drills - Google Patents

Improvements in mining drills

Info

Publication number
FR642294A
FR642294A FR642294DA FR642294A FR 642294 A FR642294 A FR 642294A FR 642294D A FR642294D A FR 642294DA FR 642294 A FR642294 A FR 642294A
Authority
FR
France
Prior art keywords
mining drills
drills
mining
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
Fred Wallace Thurston
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
Application granted granted Critical
Publication of FR642294A publication Critical patent/FR642294A/en
Expired 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods

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)
FR642294D 1927-07-29 1927-07-29 Improvements in mining drills Expired FR642294A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR642294T 1927-07-29

Publications (1)

Publication Number Publication Date
FR642294A true FR642294A (en) 1928-08-25

Family

ID=8998728

Family Applications (1)

Application Number Title Priority Date Filing Date
FR642294D Expired FR642294A (en) 1927-07-29 1927-07-29 Improvements in mining drills

Country Status (1)

Country Link
FR (1) FR642294A (en)

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