NL6806780A - - Google Patents

Info

Publication number
NL6806780A
NL6806780A NL6806780A NL6806780A NL6806780A NL 6806780 A NL6806780 A NL 6806780A NL 6806780 A NL6806780 A NL 6806780A NL 6806780 A NL6806780 A NL 6806780A NL 6806780 A NL6806780 A NL 6806780A
Authority
NL
Netherlands
Application number
NL6806780A
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 NL6806780A priority Critical patent/NL6806780A/xx
Priority to BE732629D priority patent/BE732629A/fr
Publication of NL6806780A publication Critical patent/NL6806780A/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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • E21B7/201—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes with helical conveying means
    • E21B7/203—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes with helical conveying means using down-hole drives

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
NL6806780A 1968-05-14 1968-05-14 NL6806780A (forum.php)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL6806780A NL6806780A (forum.php) 1968-05-14 1968-05-14
BE732629D BE732629A (forum.php) 1968-05-14 1969-05-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6806780A NL6806780A (forum.php) 1968-05-14 1968-05-14

Publications (1)

Publication Number Publication Date
NL6806780A true NL6806780A (forum.php) 1969-11-18

Family

ID=19803618

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6806780A NL6806780A (forum.php) 1968-05-14 1968-05-14

Country Status (1)

Country Link
NL (1) NL6806780A (forum.php)

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