NO911265L - Skrotfres. - Google Patents

Skrotfres.

Info

Publication number
NO911265L
NO911265L NO91911265A NO911265A NO911265L NO 911265 L NO911265 L NO 911265L NO 91911265 A NO91911265 A NO 91911265A NO 911265 A NO911265 A NO 911265A NO 911265 L NO911265 L NO 911265L
Authority
NO
Norway
Prior art keywords
fields
arms
coated
arm
hard metal
Prior art date
Application number
NO91911265A
Other languages
English (en)
Other versions
NO911265D0 (no
Inventor
Horace E Gilbert
Graham R Stronach
Original Assignee
Smith Int North Sea
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 Int North Sea filed Critical Smith Int North Sea
Publication of NO911265D0 publication Critical patent/NO911265D0/no
Publication of NO911265L publication Critical patent/NO911265L/no

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
    • E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
    • E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
    • 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
    • E21B10/322—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 cutter shifted by fluid pressure

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

Skrotefresen omfatter en hoveddel (3) med en nedre ende som har tilnærmet sektorformet felt (4) belagt med hard metall. En innvendig boring i hoveddelen med utvidet diameter som er utstyrt med et frem- og tilbake-bevegelig, fluid drevet stempel (20) er tettende innsluttet i den innvendige boring og forspent bort fra feltene (4) ved hjelp av en trykkfjær (30). Med innbyrdes avstand mellom hvert av feltene (4) er det anordnet en dreiearm (40) med en dreiakse vinkelrett på hoveddelens lengedeakse, idet hver arm har i det minste et nedre endeparti belagt med hard- metall, idet den nedre ende av-hver arm ligger stort sett i samme plan som de belagte felt (4). Stemplet er innrettet til å drives ved hjelp av fluidtrykk , mot armene for å dreie armene radielt utad slik at armene kan ekspandere fresens skjæreflate. Skrotfresen har derfor evnen til å bli radielt ekspandert.
NO91911265A 1990-03-29 1991-03-27 Skrotfres. NO911265L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909007023A GB9007023D0 (en) 1990-03-29 1990-03-29 Junk mill

Publications (2)

Publication Number Publication Date
NO911265D0 NO911265D0 (no) 1991-03-27
NO911265L true NO911265L (no) 1991-09-30

Family

ID=10673466

Family Applications (1)

Application Number Title Priority Date Filing Date
NO91911265A NO911265L (no) 1990-03-29 1991-03-27 Skrotfres.

Country Status (2)

Country Link
GB (2) GB9007023D0 (no)
NO (1) NO911265L (no)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0577545A1 (de) * 1992-06-19 1994-01-05 Broder Ag Bohrkrone
CN2685530Y (zh) * 2004-03-09 2005-03-16 伍利钱 扩孔钻头
US8186458B2 (en) 2005-07-06 2012-05-29 Smith International, Inc. Expandable window milling bit and methods of milling a window in casing
US7753139B2 (en) 2005-07-06 2010-07-13 Smith International, Inc. Cutting device with multiple cutting structures
GB2569330B (en) 2017-12-13 2021-01-06 Nov Downhole Eurasia Ltd Downhole devices and associated apparatus and methods
DE102018105340A1 (de) * 2018-03-08 2019-09-12 Mhwirth Gmbh Bohrkopf und diesen umfassendes Bohrsystem
CN109723385B (zh) * 2019-01-17 2021-03-19 西南石油大学 具有保径与变径功能的pdc钻头

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195636A (en) * 1962-09-07 1965-07-20 Servco Co Apparatus for cutting and milling in well bores

Also Published As

Publication number Publication date
GB9106006D0 (en) 1991-05-08
GB9007023D0 (en) 1990-05-30
GB2242379A (en) 1991-10-02
GB2242379B (en) 1993-07-28
NO911265D0 (no) 1991-03-27

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