NL114978B - - Google Patents

Info

Publication number
NL114978B
NL114978B NL114978A NL114978A NL114978B NL 114978 B NL114978 B NL 114978B NL 114978 A NL114978 A NL 114978A NL 114978 A NL114978 A NL 114978A NL 114978 B NL114978 B NL 114978B
Authority
NL
Netherlands
Application number
NL114978A
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 NL114978A priority Critical patent/NL114978B/xx
Publication of NL114978B publication Critical patent/NL114978B/xx

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
    • E21B3/00—Rotary drilling
    • E21B3/02—Surface drives for rotary drilling
    • E21B3/025—Surface drives for rotary drilling with a to-and-fro rotation of the tool

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)
NL114978A 1944-01-28 1944-01-28 NL114978B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL114978A NL114978B (zh) 1944-01-28 1944-01-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL114978A NL114978B (zh) 1944-01-28 1944-01-28

Publications (1)

Publication Number Publication Date
NL114978B true NL114978B (zh) 1948-01-02

Family

ID=1847844

Family Applications (1)

Application Number Title Priority Date Filing Date
NL114978A NL114978B (zh) 1944-01-28 1944-01-28

Country Status (1)

Country Link
NL (1) NL114978B (zh)

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