FR997699A - Improvements in the manufacture of perforators - Google Patents

Improvements in the manufacture of perforators

Info

Publication number
FR997699A
FR997699A FR997699DA FR997699A FR 997699 A FR997699 A FR 997699A FR 997699D A FR997699D A FR 997699DA FR 997699 A FR997699 A FR 997699A
Authority
FR
France
Prior art keywords
perforators
manufacture
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)
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.)
Hellefors Bruks AB
Original Assignee
Hellefors Bruks AB
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 Hellefors Bruks AB filed Critical Hellefors Bruks AB
Application granted granted Critical
Publication of FR997699A publication Critical patent/FR997699A/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

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)
FR997699D 1949-10-19 1949-10-19 Improvements in the manufacture of perforators Expired FR997699A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR997699T 1949-10-19

Publications (1)

Publication Number Publication Date
FR997699A true FR997699A (en) 1952-01-09

Family

ID=9558844

Family Applications (1)

Application Number Title Priority Date Filing Date
FR997699D Expired FR997699A (en) 1949-10-19 1949-10-19 Improvements in the manufacture of perforators

Country Status (1)

Country Link
FR (1) FR997699A (en)

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