IT1181199B - TOOL FOR LARGE DIAMETER HOLES - Google Patents

TOOL FOR LARGE DIAMETER HOLES

Info

Publication number
IT1181199B
IT1181199B IT8483388A IT8338884A IT1181199B IT 1181199 B IT1181199 B IT 1181199B IT 8483388 A IT8483388 A IT 8483388A IT 8338884 A IT8338884 A IT 8338884A IT 1181199 B IT1181199 B IT 1181199B
Authority
IT
Italy
Prior art keywords
tool
large diameter
diameter holes
holes
diameter
Prior art date
Application number
IT8483388A
Other languages
Italian (it)
Other versions
IT8483388A0 (en
Inventor
Bruno Casagrande
Original Assignee
Casagrande Spa
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 Casagrande Spa filed Critical Casagrande Spa
Priority to IT8483388A priority Critical patent/IT1181199B/en
Publication of IT8483388A0 publication Critical patent/IT8483388A0/en
Application granted granted Critical
Publication of IT1181199B publication Critical patent/IT1181199B/en

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
    • E21B7/003—Drilling with mechanical conveying means
    • E21B7/005—Drilling with mechanical conveying means with helical conveying means
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units

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)
IT8483388A 1984-07-13 1984-07-13 TOOL FOR LARGE DIAMETER HOLES IT1181199B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT8483388A IT1181199B (en) 1984-07-13 1984-07-13 TOOL FOR LARGE DIAMETER HOLES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8483388A IT1181199B (en) 1984-07-13 1984-07-13 TOOL FOR LARGE DIAMETER HOLES

Publications (2)

Publication Number Publication Date
IT8483388A0 IT8483388A0 (en) 1984-07-13
IT1181199B true IT1181199B (en) 1987-09-23

Family

ID=11321139

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8483388A IT1181199B (en) 1984-07-13 1984-07-13 TOOL FOR LARGE DIAMETER HOLES

Country Status (1)

Country Link
IT (1) IT1181199B (en)

Also Published As

Publication number Publication date
IT8483388A0 (en) 1984-07-13

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19950725