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DE1484454B1 - Erdbohrer zum unterscneiden von bohrloechern - Google Patents

Erdbohrer zum unterscneiden von bohrloechern

Info

Publication number
DE1484454B1
DE1484454B1 DE19601484454 DE1484454A DE1484454B1 DE 1484454 B1 DE1484454 B1 DE 1484454B1 DE 19601484454 DE19601484454 DE 19601484454 DE 1484454 A DE1484454 A DE 1484454A DE 1484454 B1 DE1484454 B1 DE 1484454B1
Authority
DE
Germany
Prior art keywords
flaps
cylindrical
shares
hollow shaft
drill
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.)
Pending
Application number
DE19601484454
Other languages
German (de)
English (en)
Inventor
Gustav Wolfgang Amann
Reginald John Woolgar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Economic Foundations Ltd
Original Assignee
Economic Foundations Ltd
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 Economic Foundations Ltd filed Critical Economic Foundations Ltd
Publication of DE1484454B1 publication Critical patent/DE1484454B1/de
Pending 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
    • E21B10/32—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

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)
DE19601484454 1959-07-17 1960-06-02 Erdbohrer zum unterscneiden von bohrloechern Pending DE1484454B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24712/59A GB923931A (en) 1959-07-17 1959-07-17 Improved earth boring under-reaming tool

Publications (1)

Publication Number Publication Date
DE1484454B1 true DE1484454B1 (de) 1969-09-04

Family

ID=10216052

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19601484454 Pending DE1484454B1 (de) 1959-07-17 1960-06-02 Erdbohrer zum unterscneiden von bohrloechern

Country Status (4)

Country Link
CH (1) CH385118A (ru)
DE (1) DE1484454B1 (ru)
GB (1) GB923931A (ru)
LU (1) LU38952A1 (ru)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118148502B (zh) * 2024-05-09 2024-07-23 河南普申建筑工程有限公司 一种工程建设用地质勘察用扩孔装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US21241A (en) * 1858-08-24 Railroad-rail
DE551838C (de) * 1930-02-04 1932-06-04 Johannes Busch Bohrgeraet, insbesondere zur Herstellung von Hohlraeumen fuer die Fussverbreiterung von Ortspfaehlen
FR740514A (fr) * 1932-07-26 1933-01-27 Appareil d'élargissement des puits et forages
GB395408A (en) * 1932-01-16 1933-07-17 Arthur Brannan Holmes Improvements in or relating to earth-boring apparatus
US2031353A (en) * 1935-08-16 1936-02-18 Woodruff Harvey Ellis Underreamer
GB480848A (en) * 1937-07-23 1938-03-01 Frank Smith Improvements in and relating to earth boring apparatus
US2397652A (en) * 1944-02-03 1946-04-02 Jr Woyman B Dunlap Underreamer
FR1013033A (fr) * 1950-02-20 1952-07-22 Cie D Entpr S Electr Dispositif pour creuser un épanouissement à la base d'une fouille
US2613063A (en) * 1949-10-31 1952-10-07 Ralph A Ransdall Undercutting earth auger
US2631013A (en) * 1948-04-19 1953-03-10 Darin & Armstrong Inc Hole digging apparatus
US2697586A (en) * 1949-11-26 1954-12-21 Dolen O Talley Earth underreamer

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US21241A (en) * 1858-08-24 Railroad-rail
DE551838C (de) * 1930-02-04 1932-06-04 Johannes Busch Bohrgeraet, insbesondere zur Herstellung von Hohlraeumen fuer die Fussverbreiterung von Ortspfaehlen
GB395408A (en) * 1932-01-16 1933-07-17 Arthur Brannan Holmes Improvements in or relating to earth-boring apparatus
FR740514A (fr) * 1932-07-26 1933-01-27 Appareil d'élargissement des puits et forages
US2031353A (en) * 1935-08-16 1936-02-18 Woodruff Harvey Ellis Underreamer
GB480848A (en) * 1937-07-23 1938-03-01 Frank Smith Improvements in and relating to earth boring apparatus
US2397652A (en) * 1944-02-03 1946-04-02 Jr Woyman B Dunlap Underreamer
US2631013A (en) * 1948-04-19 1953-03-10 Darin & Armstrong Inc Hole digging apparatus
US2613063A (en) * 1949-10-31 1952-10-07 Ralph A Ransdall Undercutting earth auger
US2697586A (en) * 1949-11-26 1954-12-21 Dolen O Talley Earth underreamer
FR1013033A (fr) * 1950-02-20 1952-07-22 Cie D Entpr S Electr Dispositif pour creuser un épanouissement à la base d'une fouille

Also Published As

Publication number Publication date
CH385118A (de) 1964-11-30
LU38952A1 (ru) 1960-10-14
GB923931A (en) 1963-04-18

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977