WO1997048873A3 - Non-symmetrical stress-resistant rotary drill bit cutter element - Google Patents

Non-symmetrical stress-resistant rotary drill bit cutter element Download PDF

Info

Publication number
WO1997048873A3
WO1997048873A3 PCT/US1997/010772 US9710772W WO9748873A3 WO 1997048873 A3 WO1997048873 A3 WO 1997048873A3 US 9710772 W US9710772 W US 9710772W WO 9748873 A3 WO9748873 A3 WO 9748873A3
Authority
WO
WIPO (PCT)
Prior art keywords
cutter element
face
cutter
trailing
leading
Prior art date
Application number
PCT/US1997/010772
Other languages
French (fr)
Other versions
WO1997048873A9 (en
WO1997048873A2 (en
Inventor
Gary Ray Portwood
Gary Edward Garcia
James Carl Minikus
Per Ivar Nese
Chris Edward Cawthorne
Scott D Mcdonough
Original Assignee
Smith International
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 US08/668,109 external-priority patent/US5813485A/en
Application filed by Smith International filed Critical Smith International
Priority to AU35741/97A priority Critical patent/AU3574197A/en
Priority to CA002257885A priority patent/CA2257885C/en
Priority to GB9826993A priority patent/GB2330851B/en
Publication of WO1997048873A2 publication Critical patent/WO1997048873A2/en
Publication of WO1997048873A3 publication Critical patent/WO1997048873A3/en
Publication of WO1997048873A9 publication Critical patent/WO1997048873A9/en

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
    • E21B10/50—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
    • E21B10/08—Roller bits
    • E21B10/16—Roller bits characterised by tooth form or arrangement

Abstract

A cutter element that balances maximum gage-keeping capabilities with minimal tensile stress induced damage to cutter elements is disclosed. The cutter elements (150) of the present invention have a non-symmetrical shape and may include a more aggressive cutting profile than conventional cutter elements. In one embodiment, a cutter element is configured such that the inside angle at which its leading face (114) intersects the wear face (112) is less than the inside angle at which is trailing face (118) intersects the wear face (112). This can also be accomplished by providing the cutter element (160) with a relieved wear face (162). In another embodiment of the invention, the surfaces of the present cutter element (500) are curvilinear and the transitions between the leading (514) and trailing (518) faces and the gage face are rounded or contoured. In this embodiment, the leading transition is made sharper than the trailing transition.
PCT/US1997/010772 1996-06-21 1997-06-20 Non-symmetrical stress-resistant rotary drill bit cutter element WO1997048873A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU35741/97A AU3574197A (en) 1996-06-21 1997-06-20 Non-symmetrical stress-resistant rotary drill bit cutter element
CA002257885A CA2257885C (en) 1996-06-21 1997-06-20 Non-symmetrical stress-resistant rotary drill bit cutter element
GB9826993A GB2330851B (en) 1996-06-21 1997-06-20 Non-symmetrical stress-resistant rotary drill bit cutter element

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US2019896P 1996-06-21 1996-06-21
US08/668,109 US5813485A (en) 1996-06-21 1996-06-21 Cutter element adapted to withstand tensile stress
US60/020,198 1996-06-21
US08/668,109 1996-06-21

Publications (3)

Publication Number Publication Date
WO1997048873A2 WO1997048873A2 (en) 1997-12-24
WO1997048873A3 true WO1997048873A3 (en) 1998-02-12
WO1997048873A9 WO1997048873A9 (en) 1998-04-23

Family

ID=26693157

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/010772 WO1997048873A2 (en) 1996-06-21 1997-06-20 Non-symmetrical stress-resistant rotary drill bit cutter element

Country Status (3)

Country Link
AU (1) AU3574197A (en)
GB (1) GB2330851B (en)
WO (1) WO1997048873A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109898995A (en) * 2019-02-19 2019-06-18 西南石油大学 A kind of combined type single-cone rotary drill bit with rolling ring-gear

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6053263A (en) * 1997-06-20 2000-04-25 Baker Hughes Incorporated Cutting element tip configuration for an earth-boring bit
EP0957232A1 (en) 1998-05-13 1999-11-17 BOART LONGYEAR GMBH & CO. KG HARTMETALLWERKZEUGFABRIK Roller bit with segemented cutting rings for tunneling machines
US7726420B2 (en) * 2004-04-30 2010-06-01 Smith International, Inc. Cutter having shaped working surface with varying edge chamfer
US20050247486A1 (en) * 2004-04-30 2005-11-10 Smith International, Inc. Modified cutters
CN110185397A (en) * 2019-07-11 2019-08-30 西南石油大学 A kind of circular arc-parabola-circular arc tooth structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058177A (en) * 1976-03-29 1977-11-15 Dresser Industries, Inc. Asymmetric gage insert for an earth boring apparatus
US4334586A (en) * 1980-06-05 1982-06-15 Reed Rock Bit Company Inserts for drilling bits
US5201376A (en) * 1992-04-22 1993-04-13 Dresser Industries, Inc. Rock bit with improved gage insert
US5322138A (en) * 1991-08-14 1994-06-21 Smith International, Inc. Chisel insert for rock bits
US5421423A (en) * 1994-03-22 1995-06-06 Dresser Industries, Inc. Rotary cone drill bit with improved cutter insert
US5592995A (en) * 1995-06-06 1997-01-14 Baker Hughes Incorporated Earth-boring bit having shear-cutting heel elements

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058177A (en) * 1976-03-29 1977-11-15 Dresser Industries, Inc. Asymmetric gage insert for an earth boring apparatus
US4334586A (en) * 1980-06-05 1982-06-15 Reed Rock Bit Company Inserts for drilling bits
US5322138A (en) * 1991-08-14 1994-06-21 Smith International, Inc. Chisel insert for rock bits
US5201376A (en) * 1992-04-22 1993-04-13 Dresser Industries, Inc. Rock bit with improved gage insert
US5421423A (en) * 1994-03-22 1995-06-06 Dresser Industries, Inc. Rotary cone drill bit with improved cutter insert
US5592995A (en) * 1995-06-06 1997-01-14 Baker Hughes Incorporated Earth-boring bit having shear-cutting heel elements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109898995A (en) * 2019-02-19 2019-06-18 西南石油大学 A kind of combined type single-cone rotary drill bit with rolling ring-gear
CN109898995B (en) * 2019-02-19 2021-06-08 西南石油大学 Combined single-cone bit with rolling gear ring

Also Published As

Publication number Publication date
GB9826993D0 (en) 1999-02-03
AU3574197A (en) 1998-01-07
GB2330851A (en) 1999-05-05
GB2330851B (en) 2000-08-16
WO1997048873A2 (en) 1997-12-24

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