ZA782787B - Two stage large diameter drill bit - Google Patents

Two stage large diameter drill bit

Info

Publication number
ZA782787B
ZA782787B ZA00782787A ZA782787A ZA782787B ZA 782787 B ZA782787 B ZA 782787B ZA 00782787 A ZA00782787 A ZA 00782787A ZA 782787 A ZA782787 A ZA 782787A ZA 782787 B ZA782787 B ZA 782787B
Authority
ZA
South Africa
Prior art keywords
drill bit
large diameter
diameter drill
stage large
stage
Prior art date
Application number
ZA00782787A
Other languages
English (en)
Inventor
M Maxsted
Original Assignee
Smith International
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 Smith International filed Critical Smith International
Publication of ZA782787B publication Critical patent/ZA782787B/xx

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
    • 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
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
ZA00782787A 1977-05-23 1978-05-16 Two stage large diameter drill bit ZA782787B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/799,254 US4142598A (en) 1977-05-23 1977-05-23 Two stage large diameter drill bit

Publications (1)

Publication Number Publication Date
ZA782787B true ZA782787B (en) 1979-05-30

Family

ID=25175439

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00782787A ZA782787B (en) 1977-05-23 1978-05-16 Two stage large diameter drill bit

Country Status (5)

Country Link
US (1) US4142598A (it)
AU (1) AU514796B2 (it)
CA (1) CA1083135A (it)
IT (1) IT1094785B (it)
ZA (1) ZA782787B (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE463110B (sv) * 1979-02-02 1990-10-08 Sandvik Ab Saett och anordning foer stigortsdrivning
AU539398B2 (en) * 1980-05-27 1984-09-27 Sandvik Ab Boring head
US4832135A (en) * 1988-02-29 1989-05-23 Baker Hughes Incorporated Flow through raise boring bit
NL1016496C2 (nl) * 1999-11-02 2001-06-06 Visser & Smit Bv Werkwijze voor het aanleggen van een geboorde tunnel.
US6386298B1 (en) 2000-05-30 2002-05-14 Michael Gerald Smith Apparatus for directional drilling
US8464813B2 (en) 2006-06-20 2013-06-18 Atlas Copco Secoroc Llc Cutter assembly for a raise boring reamer
PT3101216T (pt) 2015-06-01 2018-10-08 Sandvik Intellectual Property Cabeça de perfuração para perfuração rotativa
CN110439466B (zh) * 2019-09-03 2024-04-23 重庆科技学院 一种双级动力扩孔钻具

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3659660A (en) * 1970-04-10 1972-05-02 Dresser Ind Large diameter bit for shallow angle holes
US3797592A (en) * 1972-11-21 1974-03-19 Kennametal Inc Stabilizing roller
US4010808A (en) * 1975-09-22 1977-03-08 Dresser Industries, Inc. Expandable raise bit
US4049067A (en) * 1975-11-05 1977-09-20 Ingersoll-Rand Company Cutter mounting extension apparatus
US4071098A (en) * 1976-10-28 1978-01-31 Ingersoll-Rand Company Cutter mounting extension apparatus

Also Published As

Publication number Publication date
IT7823645A0 (it) 1978-05-22
AU514796B2 (en) 1981-02-26
CA1083135A (en) 1980-08-05
IT1094785B (it) 1985-08-02
US4142598A (en) 1979-03-06
AU3620478A (en) 1979-11-22

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