NL6902809A - - Google Patents

Info

Publication number
NL6902809A
NL6902809A NL6902809A NL6902809A NL6902809A NL 6902809 A NL6902809 A NL 6902809A NL 6902809 A NL6902809 A NL 6902809A NL 6902809 A NL6902809 A NL 6902809A NL 6902809 A NL6902809 A NL 6902809A
Authority
NL
Netherlands
Application number
NL6902809A
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 NL6902809A priority Critical patent/NL6902809A/xx
Priority to BE732629D priority patent/BE732629A/fr
Publication of NL6902809A publication Critical patent/NL6902809A/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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/005—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by forcing prefabricated elements through the ground, e.g. by pushing lining from an access pit

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
NL6902809A 1968-05-14 1969-02-22 NL6902809A (enrdf_load_stackoverflow)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL6902809A NL6902809A (enrdf_load_stackoverflow) 1969-02-22 1969-02-22
BE732629D BE732629A (enrdf_load_stackoverflow) 1968-05-14 1969-05-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6902809A NL6902809A (enrdf_load_stackoverflow) 1969-02-22 1969-02-22

Publications (1)

Publication Number Publication Date
NL6902809A true NL6902809A (enrdf_load_stackoverflow) 1970-08-25

Family

ID=19806234

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6902809A NL6902809A (enrdf_load_stackoverflow) 1968-05-14 1969-02-22

Country Status (1)

Country Link
NL (1) NL6902809A (enrdf_load_stackoverflow)

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