CH439185A - Method and device for widening a borehole in rock - Google Patents

Method and device for widening a borehole in rock

Info

Publication number
CH439185A
CH439185A CH1202466A CH1202466A CH439185A CH 439185 A CH439185 A CH 439185A CH 1202466 A CH1202466 A CH 1202466A CH 1202466 A CH1202466 A CH 1202466A CH 439185 A CH439185 A CH 439185A
Authority
CH
Switzerland
Prior art keywords
borehole
widening
rock
Prior art date
Application number
CH1202466A
Other languages
German (de)
Inventor
Hans-Peter Dipl Ing Drescher
Original Assignee
Beteiligungs & Patentverw Gmbh
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 Beteiligungs & Patentverw Gmbh filed Critical Beteiligungs & Patentverw Gmbh
Publication of CH439185A publication Critical patent/CH439185A/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
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • E21B10/325—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools the cutter being shifted by a spring mechanism
    • 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
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/11—Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
    • E21D9/112—Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines by means of one single rotary head or of concentric rotary heads
    • E21D9/115—Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines by means of one single rotary head or of concentric rotary heads with cutting tools mounted pivotably or slidable on the head

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)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Earth Drilling (AREA)
CH1202466A 1965-08-24 1966-08-19 Method and device for widening a borehole in rock CH439185A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0083403 1965-08-24

Publications (1)

Publication Number Publication Date
CH439185A true CH439185A (en) 1967-07-15

Family

ID=6981954

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1202466A CH439185A (en) 1965-08-24 1966-08-19 Method and device for widening a borehole in rock

Country Status (3)

Country Link
AT (1) AT264423B (en)
CH (1) CH439185A (en)
GB (1) GB1111256A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO176528C (en) * 1992-02-17 1995-04-19 Kverneland Klepp As Device at drill bit
GB2412388B (en) 2004-03-27 2006-09-27 Schlumberger Holdings Bottom hole assembly

Also Published As

Publication number Publication date
AT264423B (en) 1968-08-26
GB1111256A (en) 1968-04-24

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