DE115257C - - Google Patents

Info

Publication number
DE115257C
DE115257C DENDAT115257D DE115257DA DE115257C DE 115257 C DE115257 C DE 115257C DE NDAT115257 D DENDAT115257 D DE NDAT115257D DE 115257D A DE115257D A DE 115257DA DE 115257 C DE115257 C DE 115257C
Authority
DE
Germany
Prior art keywords
drilling
drill bit
chisels
widening
borehole
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
DENDAT115257D
Other languages
German (de)
English (en)
Publication of DE115257C publication Critical patent/DE115257C/de
Active legal-status Critical Current

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
    • E21B10/265—Bi-center drill bits, i.e. an integral bit and eccentric reamer used to simultaneously drill and underream the hole
    • 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
    • E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
    • E21B10/66—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe the cutting element movable through the drilling pipe and laterally shiftable

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)
  • Earth Drilling (AREA)
DENDAT115257D Active DE115257C (enrdf_load_html_response)

Publications (1)

Publication Number Publication Date
DE115257C true DE115257C (enrdf_load_html_response)

Family

ID=384687

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT115257D Active DE115257C (enrdf_load_html_response)

Country Status (1)

Country Link
DE (1) DE115257C (enrdf_load_html_response)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739379C (de) * 1941-11-01 1943-09-23 Bergbau Und Huettenbedarf Ag F Stufenbohrer
EP0058061A3 (en) * 1981-02-07 1982-09-01 DRILLING & SERVICE U.K. LIMITED Tools for underground formations

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739379C (de) * 1941-11-01 1943-09-23 Bergbau Und Huettenbedarf Ag F Stufenbohrer
EP0058061A3 (en) * 1981-02-07 1982-09-01 DRILLING & SERVICE U.K. LIMITED Tools for underground formations

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