DE2112420B2 - Erweiterungsbohrkopf - Google Patents

Erweiterungsbohrkopf

Info

Publication number
DE2112420B2
DE2112420B2 DE2112420A DE2112420A DE2112420B2 DE 2112420 B2 DE2112420 B2 DE 2112420B2 DE 2112420 A DE2112420 A DE 2112420A DE 2112420 A DE2112420 A DE 2112420A DE 2112420 B2 DE2112420 B2 DE 2112420B2
Authority
DE
Germany
Prior art keywords
cutting
central shaft
rollers
cutting rollers
drill head
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.)
Ceased
Application number
DE2112420A
Other languages
German (de)
English (en)
Other versions
DE2112420A1 (de
Inventor
Milton L. China Spring Tex. Talbert (V.St.A.)
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.)
Dresser Industries Inc
Original Assignee
Dresser Industries Inc
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 Dresser Industries Inc filed Critical Dresser Industries Inc
Publication of DE2112420A1 publication Critical patent/DE2112420A1/de
Publication of DE2112420B2 publication Critical patent/DE2112420B2/de
Ceased 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
    • E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
    • 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
    • E21B10/08—Roller bits
    • E21B10/10—Roller bits with roller axle supported at both ends

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)
DE2112420A 1970-03-09 1971-03-09 Erweiterungsbohrkopf Ceased DE2112420B2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1766370A 1970-03-09 1970-03-09

Publications (2)

Publication Number Publication Date
DE2112420A1 DE2112420A1 (de) 1971-09-30
DE2112420B2 true DE2112420B2 (de) 1978-11-02

Family

ID=21783864

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2112420A Ceased DE2112420B2 (de) 1970-03-09 1971-03-09 Erweiterungsbohrkopf

Country Status (7)

Country Link
US (1) US3633691A (enExample)
JP (1) JPS526921B1 (enExample)
CA (1) CA931137A (enExample)
DE (1) DE2112420B2 (enExample)
FR (1) FR2081802B1 (enExample)
GB (1) GB1348670A (enExample)
ZA (1) ZA71818B (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750767A (en) * 1971-05-24 1973-08-07 Hughes Tool Co Rolling cutter mounting in big hole reaming bit
ZA714204B (en) * 1971-06-28 1972-03-29 Mcdonnell P Ltd Improvements in or relating to rotary cutters
JPS5527657U (enExample) * 1978-08-11 1980-02-22
US4258805A (en) * 1979-08-27 1981-03-31 Dresser Industries, Inc. Low cutter load raise head
NO176528C (no) * 1992-02-17 1995-04-19 Kverneland Klepp As Anordning ved borekroner

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1322696A (en) * 1918-10-29 1919-11-25 Howard R Hughes Rotary boring-drill.
US1826059A (en) * 1927-09-07 1931-10-06 Dunn William Tracy Drilling head
US2064273A (en) * 1935-04-22 1936-12-15 Hughes Tool Co Roller boring drill
US2122808A (en) * 1935-12-24 1938-07-05 Globe Oil Tools Co Rock bit
US2208530A (en) * 1938-02-03 1940-07-16 Thompson Tool Company Inc Rotary well drill
US2703698A (en) * 1951-09-17 1955-03-08 William J B Westerman Counterboring rotary drill
US3285355A (en) * 1964-02-17 1966-11-15 Smith Ind International Inc Large diameter well-drilling bit
US3437380A (en) * 1967-11-06 1969-04-08 Alkirk Inc Steering method and apparatus

Also Published As

Publication number Publication date
US3633691A (en) 1972-01-11
FR2081802A1 (enExample) 1971-12-10
DE2112420A1 (de) 1971-09-30
GB1348670A (en) 1974-03-20
CA931137A (en) 1973-07-31
FR2081802B1 (enExample) 1975-02-21
JPS526921B1 (enExample) 1977-02-25
ZA71818B (en) 1971-10-27

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Legal Events

Date Code Title Description
8235 Patent refused