EP0237359A3 - Rotary drag bits - Google Patents

Rotary drag bits Download PDF

Info

Publication number
EP0237359A3
EP0237359A3 EP87302180A EP87302180A EP0237359A3 EP 0237359 A3 EP0237359 A3 EP 0237359A3 EP 87302180 A EP87302180 A EP 87302180A EP 87302180 A EP87302180 A EP 87302180A EP 0237359 A3 EP0237359 A3 EP 0237359A3
Authority
EP
European Patent Office
Prior art keywords
cutters
rotary drag
drag bits
rotary
earth formation
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.)
Withdrawn
Application number
EP87302180A
Other languages
German (de)
French (fr)
Other versions
EP0237359A2 (en
Inventor
George Fyfe
Kenneth William Jones
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
Publication of EP0237359A2 publication Critical patent/EP0237359A2/en
Publication of EP0237359A3 publication Critical patent/EP0237359A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B10/5673—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts having a non planar or non circular cutting face
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
    • E21B10/52—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type with chisel- or button-type inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable

Abstract

A rotary drag bit (11) has cutters (19) rotatably mounted to fixtures (21) with journals. The cutters (19) are constantly forced to rotate or precess by the interaction between the earth formation and the cutter (19). The cutters (19) are fixed in skewed or offset positions on a cutting face (17) of a rotary drill bit head (11). These cutters (19) act as drag or shear cutters when they are operated in an earth formation.
EP87302180A 1986-03-13 1987-03-13 Rotary drag bits Withdrawn EP0237359A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US83943486A 1986-03-13 1986-03-13
US839434 1997-04-10

Publications (2)

Publication Number Publication Date
EP0237359A2 EP0237359A2 (en) 1987-09-16
EP0237359A3 true EP0237359A3 (en) 1988-11-23

Family

ID=25279716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87302180A Withdrawn EP0237359A3 (en) 1986-03-13 1987-03-13 Rotary drag bits

Country Status (6)

Country Link
EP (1) EP0237359A3 (en)
AU (1) AU590826B2 (en)
BR (1) BR8701601A (en)
CA (1) CA1260923A (en)
MX (1) MX161103A (en)
NO (1) NO871037L (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4846290A (en) * 1986-03-13 1989-07-11 Smith International, Inc. Underreamer with revolving diamond cutter elements
EP0370199A1 (en) * 1988-10-25 1990-05-30 General Electric Company Drill bits utilizing polycrystalline diamond grit
DE9206657U1 (en) * 1992-05-15 1993-09-16 Toepfer Rainer Rotary tool with carbide inserts
AU683404B2 (en) * 1994-10-14 1997-11-06 Kennametal Inc. Concave cutter bit
US5678645A (en) * 1995-11-13 1997-10-21 Baker Hughes Incorporated Mechanically locked cutters and nozzles

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1533286A (en) * 1924-06-09 1925-04-14 Harry P Wickersham Well-drilling bit
US3830321A (en) * 1973-02-20 1974-08-20 Kennametal Inc Excavating tool and a bit for use therewith
US4253533A (en) * 1979-11-05 1981-03-03 Smith International, Inc. Variable wear pad for crossflow drag bit
EP0079243A1 (en) * 1981-11-09 1983-05-18 Sumitomo Electric Industries Limited A composite compact component comprising a diamond or boron nitride compact
US4448269A (en) * 1981-10-27 1984-05-15 Hitachi Construction Machinery Co., Ltd. Cutter head for pit-boring machine
US4553615A (en) * 1982-02-20 1985-11-19 Nl Industries, Inc. Rotary drilling bits
GB2167107A (en) * 1984-11-15 1986-05-21 Keith Malcolm Brown Drilling bits

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1584752A (en) * 1977-05-25 1981-02-18 Transport Secretary Of State F Rock cutting tools

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1533286A (en) * 1924-06-09 1925-04-14 Harry P Wickersham Well-drilling bit
US3830321A (en) * 1973-02-20 1974-08-20 Kennametal Inc Excavating tool and a bit for use therewith
US4253533A (en) * 1979-11-05 1981-03-03 Smith International, Inc. Variable wear pad for crossflow drag bit
US4448269A (en) * 1981-10-27 1984-05-15 Hitachi Construction Machinery Co., Ltd. Cutter head for pit-boring machine
EP0079243A1 (en) * 1981-11-09 1983-05-18 Sumitomo Electric Industries Limited A composite compact component comprising a diamond or boron nitride compact
US4553615A (en) * 1982-02-20 1985-11-19 Nl Industries, Inc. Rotary drilling bits
GB2167107A (en) * 1984-11-15 1986-05-21 Keith Malcolm Brown Drilling bits

Also Published As

Publication number Publication date
NO871037L (en) 1987-09-14
NO871037D0 (en) 1987-03-13
AU590826B2 (en) 1989-11-16
CA1260923A (en) 1989-09-26
MX161103A (en) 1990-07-31
EP0237359A2 (en) 1987-09-16
AU6998587A (en) 1987-09-17
BR8701601A (en) 1988-01-12

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Inventor name: FYFE, GEORGE

Inventor name: JONES, KENNETH WILLIAM