EP0905348B1 - Schneidarm für Räumer - Google Patents

Schneidarm für Räumer Download PDF

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Publication number
EP0905348B1
EP0905348B1 EP98122696A EP98122696A EP0905348B1 EP 0905348 B1 EP0905348 B1 EP 0905348B1 EP 98122696 A EP98122696 A EP 98122696A EP 98122696 A EP98122696 A EP 98122696A EP 0905348 B1 EP0905348 B1 EP 0905348B1
Authority
EP
European Patent Office
Prior art keywords
face
wear resistant
blade
resistant members
gauge
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.)
Expired - Lifetime
Application number
EP98122696A
Other languages
English (en)
French (fr)
Other versions
EP0905348A3 (de
EP0905348A2 (de
Inventor
Bruce Mcgarian
Richard Alvin Armell
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.)
Smith International Inc
Original Assignee
Smith International 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 Smith International Inc filed Critical Smith International Inc
Priority claimed from EP95935506A external-priority patent/EP0788578B1/de
Publication of EP0905348A2 publication Critical patent/EP0905348A2/de
Publication of EP0905348A3 publication Critical patent/EP0905348A3/de
Application granted granted Critical
Publication of EP0905348B1 publication Critical patent/EP0905348B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits

Definitions

  • the alternative wear resistant member 56 exhibits the same general zones A,B,C and D as the wear resistant member 52 illustrated in Figures 6-8.
  • the zones A,B and C are provided with natural diamond inserts 57 which are suitably spaced and offset to give full area coverage as the tool rotates.
  • the diamonds in the transition zone B may have the preferred length: diameter ratio 2:1 as with the inserts of the arrangements of Figures 6-8.
  • tungsten carbide inserts 58 in the form of rectangular blocks are provided to ensure wear resistance in the gauge area.
  • the tungsten carbide inserts 58 alternate with rows of natural diamond inserts 57 in the gauge face D.

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)
  • Butt Welding And Welding Of Specific Article (AREA)

Claims (8)

  1. Messer (5A, 5B, 6A, 6B) für einen Unterschneider, wobei das Messer umfasst: einen Arm, eine Schwenkanbringung, mit der der Arm in Funktion funktionell an einem Unterschneider-Körper zur Schwenkbewegung um eine Schwenkachse herum zwischen einer eingezogenen Position und einer ausgefahrenen Position angebracht ist, eine Vielzahl verschleißfester Elemente, die eine erste Schneidfläche (A) bilden, die sich, wenn sich das Messer in seiner ausgefahrenen Position befindet, quer zur Längsachse des Unterschneiders erstreckt, um in einer Abwärtsbohrlochrichtung in Material zu schneiden, das den Unterschneider-Körper umgibt, eine Vielzahl verschleißfester Elemente, die eine Außenschneidfläche (D) bilden, die, wenn sich der Arm in seiner ausgefahrenen Position befindet, den maximalen Durchmesser des Unterschneiders definiert, sowie eine Vielzahl verschleißfester Elemente, die eine obere Schneidfläche (C) definieren, die sich vom oberen Ende der Außenschneidfläche nach innen erstreckt, um in einer Aufwärtsrichtung in Material zu schneiden, das den Unterschneider-Körper umgibt, wobei das Messer dadurch gekennzeichnet ist, dass die erste Schneidfläche (A) so angeordnet ist, dass sie in einer Ebene senkrecht zu der Ebene liegt, in der die Außenfläche (D) liegt, und dass die verschleißfesten Elemente, die die Außen- und die erste Schneidfläche bilden, in einem gemeinsamen Träger (51) eingebettet sind, der durch Schweißen oder Hartlöten an dem Arm befestigt wird.
  2. Messer nach Anspruch 1, wobei die verschleißfesten Elemente (54), die an der Außenfläche (D) vorhanden sind, über die Fläche hinaus ragen.
  3. Messer nach Anspruch 1 oder 2, wobei die verschleißfesten Elemente (54), die an der Außenfläche (D) vorhanden sind, voneinander so beabstandet sind, dass ein Weg (55) für Fluid entsteht, das in Funktion an dem Messer vorbeifließt.
  4. Messer nach einem der vorangehenden Ansprüche, wobei die verschleißfesten Elemente (54), die an der Außenfläche (D) vorhanden sind, längliche Stäbe aus Diamant oder Wolframkarbid sind.
  5. Messer nach einem der vorangehenden Ansprüche, wobei die verschleißfesten Elemente an der Schneidfläche (A) Diamanteinsätze sind.
  6. Messer nach einem der vorangehenden Ansprüche, wobei die Eigenschaften und/oder die Anordnungsdichte der verschleißfesten Elemente entsprechend ihrer Position an dem Träger (51) variieren.
  7. Messer nach einem der vorangehenden Ansprüche, wobei der Träger (51) aus einer Wolfram-Nickel-Kobalt-Matrix besteht.
  8. Messer nach einem der vorangehenden Ansprüche, wobei die verschleißfesten Elemente, die die obere Schneidfläche (C) bilden, in dem Träger (51) eingebettet sind.
EP98122696A 1994-10-31 1995-10-31 Schneidarm für Räumer Expired - Lifetime EP0905348B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9422022 1994-10-31
GB9422022A GB9422022D0 (en) 1994-10-31 1994-10-31 Two stage underreamer
GB9505430 1995-03-17
GBGB9505430.0A GB9505430D0 (en) 1994-10-31 1995-03-17 2-stage underreamer
EP95935506A EP0788578B1 (de) 1994-10-31 1995-10-31 Zweistufiger räumer

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP95935506A Division EP0788578B1 (de) 1994-10-31 1995-10-31 Zweistufiger räumer

Publications (3)

Publication Number Publication Date
EP0905348A2 EP0905348A2 (de) 1999-03-31
EP0905348A3 EP0905348A3 (de) 1999-06-30
EP0905348B1 true EP0905348B1 (de) 2005-01-26

Family

ID=10763721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98122696A Expired - Lifetime EP0905348B1 (de) 1994-10-31 1995-10-31 Schneidarm für Räumer

Country Status (2)

Country Link
EP (1) EP0905348B1 (de)
GB (2) GB9422022D0 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109667544A (zh) * 2018-12-27 2019-04-23 中国水利水电科学研究院 一种岩体钻孔扩孔器及扩孔方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644673A (en) * 1949-09-26 1953-07-07 Baker Oil Tools Inc Expansible rotary drill bit and cutter
US5242017A (en) * 1991-12-27 1993-09-07 Hailey Charles D Cutter blades for rotary tubing tools

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851719A (en) * 1973-03-22 1974-12-03 American Coldset Corp Stabilized under-drilling apparatus
GB1464464A (en) * 1974-04-25 1977-02-16 Mindrill Ltd Drill comprising a tubular drill string and apparatus releasably connectable to the bottom of said drill string
NO820347L (no) * 1981-02-07 1982-08-09 Drilling & Service Uk Ltd Verktoey for undergrunnsformasjoner
US4586574A (en) * 1983-05-20 1986-05-06 Norton Christensen, Inc. Cutter configuration for a gage-to-shoulder transition and face pattern
US4809793A (en) * 1987-10-19 1989-03-07 Hailey Charles D Enhanced diameter clean-out tool and method
US4869330A (en) * 1988-01-20 1989-09-26 Eastman Christensen Company Apparatus for establishing hydraulic flow regime in drill bits
GB8907618D0 (en) * 1989-04-05 1989-05-17 Morrison Pumps Sa Drilling
US5036921A (en) * 1990-06-28 1991-08-06 Slimdril International, Inc. Underreamer with sequentially expandable cutter blades
US5178222A (en) * 1991-07-11 1993-01-12 Baker Hughes Incorporated Drill bit having enhanced stability

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644673A (en) * 1949-09-26 1953-07-07 Baker Oil Tools Inc Expansible rotary drill bit and cutter
US5242017A (en) * 1991-12-27 1993-09-07 Hailey Charles D Cutter blades for rotary tubing tools

Also Published As

Publication number Publication date
GB9505430D0 (en) 1995-05-03
EP0905348A3 (de) 1999-06-30
GB9422022D0 (en) 1994-12-21
EP0905348A2 (de) 1999-03-31

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