EP1134355A3 - Rotary drill bit - Google Patents

Rotary drill bit Download PDF

Info

Publication number
EP1134355A3
EP1134355A3 EP01113872A EP01113872A EP1134355A3 EP 1134355 A3 EP1134355 A3 EP 1134355A3 EP 01113872 A EP01113872 A EP 01113872A EP 01113872 A EP01113872 A EP 01113872A EP 1134355 A3 EP1134355 A3 EP 1134355A3
Authority
EP
European Patent Office
Prior art keywords
cutters
cutter
bit body
negative side
ridge
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Withdrawn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
EP01113872A
Other languages
German (de)
French (fr)
Other versions
EP1134355A2 (en
Inventor
John M. Fuller
Andrew Murdock
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.)
Camco Drilling Group Ltd
Original Assignee
Camco Drilling Group Ltd
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 Camco Drilling Group Ltd filed Critical Camco Drilling Group Ltd
Priority claimed from EP95306936A external-priority patent/EP0707130B1/en
Publication of EP1134355A2 publication Critical patent/EP1134355A2/en
Publication of EP1134355A3 publication Critical patent/EP1134355A3/en
Withdrawn legal-status Critical Current

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
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)

Abstract

A rotary drill bit comprises a bit body (10) having a shank (13) for connection to a drill string, a plurality of cutters (23) mounted on the bit body, each cutter having a cutting face (24, 25), and means for supplying drilling fluid to the surface of the bit body to cool and clean the cutters. At least some of the cutters (23) are lateral cutters located to act sideways on the formation being drilled, and the cutting faces (24, 25) of such lateral cutters are orientated to exhibit negative side rake and negative top rake with respect to the surface of the formation. The negative side rake angle is greater than 20° and may be as much as 90°, and the negative top rake angle is also more than 20°. A single cutter (23) may include two cutting faces (24, 25) at different negative side rake angles, e.g. the cutter may comprise a generally cylindrical substrate (26) formed at one end with two oppositely inclined surfaces (24, 25) meeting along a ridge, a facing table of polycrystalline diamond being bonded to the substrate surfaces and extending over the ridge.
EP01113872A 1994-10-15 1995-09-29 Rotary drill bit Withdrawn EP1134355A3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9420839 1994-10-15
GB9420839A GB9420839D0 (en) 1994-10-15 1994-10-15 Improvements in or relating to rotary drill bits
EP95306936A EP0707130B1 (en) 1994-10-15 1995-09-29 Rotary drill bits

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP95306936A Division EP0707130B1 (en) 1994-10-15 1995-09-29 Rotary drill bits

Publications (2)

Publication Number Publication Date
EP1134355A2 EP1134355A2 (en) 2001-09-19
EP1134355A3 true EP1134355A3 (en) 2002-03-06

Family

ID=10762922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01113872A Withdrawn EP1134355A3 (en) 1994-10-15 1995-09-29 Rotary drill bit

Country Status (2)

Country Link
EP (1) EP1134355A3 (en)
GB (1) GB9420839D0 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2404889A (en) * 2003-08-12 2005-02-16 Black & Decker Inc A cutting plate for a drill bit
CN101605962A (en) 2007-02-12 2009-12-16 贝克休斯公司 Rotary drag
CN101868293B (en) 2007-10-03 2013-07-03 Emd密理博公司 Stacked plates filtration cartridge
CN108222845B (en) * 2018-04-09 2024-04-26 成都百施特金刚石钻头有限公司 Annular cutting alloy tooth for drilling and production tool
CN113404436B (en) * 2021-07-29 2022-08-09 东北石油大学 Directional double-tooth self-balancing PDC drill bit suitable for soft and hard interlayer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140189A (en) * 1977-06-06 1979-02-20 Smith International, Inc. Rock bit with diamond reamer to maintain gage
US4475606A (en) * 1982-08-09 1984-10-09 Dresser Industries, Inc. Drag bit
EP0522553A1 (en) * 1991-07-11 1993-01-13 Baker Hughes Incorporated Drill bit having enhanced stability
EP0575198A1 (en) * 1992-06-19 1993-12-22 Dresser Industries Inc. Drill bit with improved cutter sizing pattern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140189A (en) * 1977-06-06 1979-02-20 Smith International, Inc. Rock bit with diamond reamer to maintain gage
US4475606A (en) * 1982-08-09 1984-10-09 Dresser Industries, Inc. Drag bit
EP0522553A1 (en) * 1991-07-11 1993-01-13 Baker Hughes Incorporated Drill bit having enhanced stability
EP0575198A1 (en) * 1992-06-19 1993-12-22 Dresser Industries Inc. Drill bit with improved cutter sizing pattern

Also Published As

Publication number Publication date
EP1134355A2 (en) 2001-09-19
GB9420839D0 (en) 1994-11-30

Similar Documents

Publication Publication Date Title
CA2010796C (en) Downhole milling tool and cutter therefor
US5746280A (en) Earth-boring bit having shear-cutting inner row elements
EP0841463A3 (en) Preform cutting element for rotary drill bits
EP0658682B1 (en) Gage cutting insert for roller bit
EP0747566B1 (en) Earth-boring bit having shear-cutting heel elements
US4659264A (en) Drill and indexable carbide insert therefor
US7513319B2 (en) Reamer bit
EP0835981A3 (en) Cutting structure for rotary drill bits
EP0233737A3 (en) Mounting means for cutting elements in drag type rotary drill bit
EP0872624A3 (en) Improvements in or relating to rotary drill bits
CA2151899A1 (en) Tool component
CA2140828C (en) Compound diamond cutter
US8172011B2 (en) Cutting element
SE8400950L (en) CUTTING ELEMENTS AND DRILLS
GB2316111A (en) Rotary bit with shear cutting elements
EP0941795A3 (en) Complex cutting-blade tool and machining method using same
WO2004106693A3 (en) Method and appartus for cutting earthen formations
US4836178A (en) Inset for a tool
EP0263660B1 (en) Cutting component
EP1134355A3 (en) Rotary drill bit
US7228922B1 (en) Drill bit
EP0145422A3 (en) Improvements in rotary drill bits
EP1227214A3 (en) Cutting structure for drill bit
IE860437L (en) "Rotary drill bits and methods of manufacturing such bits"
SE9404145L (en) Device for machining boreholes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010621

AC Divisional application: reference to earlier application

Ref document number: 707130

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE DE FR IE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE FR IE

AKX Designation fees paid

Free format text: BE DE FR IE

17Q First examination report despatched

Effective date: 20050428

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20051109