EP0237359A3 - Rotary drag bits - Google Patents

Rotary drag bits Download PDF

Info

Publication number
EP0237359A3
EP0237359A3 EP19870302180 EP87302180A EP0237359A3 EP 0237359 A3 EP0237359 A3 EP 0237359A3 EP 19870302180 EP19870302180 EP 19870302180 EP 87302180 A EP87302180 A EP 87302180A EP 0237359 A3 EP0237359 A3 EP 0237359A3
Authority
EP
Grant status
Application
Patent type
Prior art keywords
cutters
drag
rotary
bit
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Withdrawn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
EP19870302180
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

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56Button type inserts
    • E21B10/567Button type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/50Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/50Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
    • E21B10/52Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type with chisel or button type inserts
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/62Drill 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.
EP19870302180 1986-03-13 1987-03-13 Rotary drag bits Withdrawn EP0237359A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US83943486 true 1986-03-13 1986-03-13
US839434 1997-04-10

Publications (2)

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

Family

ID=25279716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870302180 Withdrawn EP0237359A3 (en) 1986-03-13 1987-03-13 Rotary drag bits

Country Status (2)

Country Link
EP (1) EP0237359A3 (en)
CA (1) CA1260923A (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
WO1996012084A1 (en) * 1994-10-14 1996-04-25 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

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 Type
CA1260923A1 (en) grant
CA1260923A (en) 1989-09-26 grant
EP0237359A2 (en) 1987-09-16 application

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Legal Events

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17P Request for examination filed

Effective date: 19890518

17Q First examination report

Effective date: 19900212

18D Deemed to be withdrawn

Effective date: 19910903

RIN1 Inventor (correction)

Inventor name: FYFE, GEORGE

Inventor name: JONES, KENNETH WILLIAM