NO971931L - 2-trinns underrömmer - Google Patents

2-trinns underrömmer

Info

Publication number
NO971931L
NO971931L NO971931A NO971931A NO971931L NO 971931 L NO971931 L NO 971931L NO 971931 A NO971931 A NO 971931A NO 971931 A NO971931 A NO 971931A NO 971931 L NO971931 L NO 971931L
Authority
NO
Norway
Prior art keywords
blades
slots
stage
undercream
tungsten
Prior art date
Application number
NO971931A
Other languages
English (en)
Other versions
NO971931D0 (no
NO311536B1 (no
Inventor
Bruce Mcgarian
Richard Alvin Armell
Original Assignee
Red Baron Oil Tools Rental
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
Priority claimed from GB9422022A external-priority patent/GB9422022D0/en
Application filed by Red Baron Oil Tools Rental filed Critical Red Baron Oil Tools Rental
Publication of NO971931D0 publication Critical patent/NO971931D0/no
Publication of NO971931L publication Critical patent/NO971931L/no
Priority to NO20013267A priority Critical patent/NO325425B1/no
Publication of NO311536B1 publication Critical patent/NO311536B1/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
    • 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
    • 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
    • E21B47/095—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes by detecting an acoustic anomalies, e.g. using mud-pressure pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Geophysics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Earth Drilling (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Amplifiers (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)
  • Reciprocating Pumps (AREA)

Abstract

En 2-trinns underrømmer for bruk i en underjordisk brønnboring omfatter et legeme (2) i ett stykke som har øvre og nedre blader (5A,5B) og (6A.6B) montert i spalter (3,4) utformet vinkelrett på hverandre i legemet. Adskilte øvre og nedre stempelenheter er anordnet for å drive bladene (5A,5B) og (6A.6B) respektivt fra en oppbevaringsstilling hvori de befinner seg stort sett fullstendig inne i spaltene (3,4) til en brukksstilling som vist i figuren. Hvert blad omfatter med fordel en stålarm som har påmontert en hoveddelav Wolfram-nikkel-kobolt matrise hvori innsatser av diamant og/eller Wolframkarbid er innlagt. Et signal blir gitt til overflaten om at bladene er i deres utkjørte stilling ved endring av boreslam-trykket.
NO19971931A 1994-10-31 1997-04-25 Dobbel underrömmer NO311536B1 (no)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NO20013267A NO325425B1 (no) 1994-10-31 2001-06-29 Dobbel underrommer

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9422022A GB9422022D0 (en) 1994-10-31 1994-10-31 Two stage underreamer
GBGB9505430.0A GB9505430D0 (en) 1994-10-31 1995-03-17 2-stage underreamer
PCT/GB1995/002540 WO1996013648A1 (en) 1994-10-31 1995-10-31 2-stage underreamer

Publications (3)

Publication Number Publication Date
NO971931D0 NO971931D0 (no) 1997-04-25
NO971931L true NO971931L (no) 1997-06-12
NO311536B1 NO311536B1 (no) 2001-12-03

Family

ID=26305906

Family Applications (1)

Application Number Title Priority Date Filing Date
NO19971931A NO311536B1 (no) 1994-10-31 1997-04-25 Dobbel underrömmer

Country Status (8)

Country Link
US (1) US5853054A (no)
EP (1) EP0788578B1 (no)
AT (1) ATE181137T1 (no)
AU (1) AU3750195A (no)
DE (1) DE69510217D1 (no)
GB (1) GB2308608B (no)
NO (1) NO311536B1 (no)
WO (1) WO1996013648A1 (no)

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Also Published As

Publication number Publication date
EP0788578B1 (en) 1999-06-09
GB9707616D0 (en) 1997-06-04
EP0788578A1 (en) 1997-08-13
ATE181137T1 (de) 1999-06-15
WO1996013648A1 (en) 1996-05-09
NO971931D0 (no) 1997-04-25
US5853054A (en) 1998-12-29
DE69510217D1 (de) 1999-07-15
AU3750195A (en) 1996-05-23
GB2308608B (en) 1998-11-18
NO311536B1 (no) 2001-12-03
GB2308608A (en) 1997-07-02

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