WO2004076800A1 - Secondary cutting element for drill bit - Google Patents
Secondary cutting element for drill bit Download PDFInfo
- Publication number
- WO2004076800A1 WO2004076800A1 PCT/IB2004/000472 IB2004000472W WO2004076800A1 WO 2004076800 A1 WO2004076800 A1 WO 2004076800A1 IB 2004000472 W IB2004000472 W IB 2004000472W WO 2004076800 A1 WO2004076800 A1 WO 2004076800A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bit
- cutter
- cutters
- substrate
- superabrasive
- Prior art date
Links
- 239000000758 substrate Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 11
- 239000011435 rock Substances 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 7
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 6
- 239000010432 diamond Substances 0.000 claims abstract description 6
- GJNGXPDXRVXSEH-UHFFFAOYSA-N 4-chlorobenzonitrile Chemical compound ClC1=CC=C(C#N)C=C1 GJNGXPDXRVXSEH-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 description 7
- 230000000295 complement effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 241000168096 Glareolidae Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
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
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
-
- 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
- E21B10/573—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element
- E21B10/5735—Interface between the substrate and the cutting element
Definitions
- THIS invention relates to a drill bit for use in drilling or boring into subterranean rock formations, and to a tool component therefor.
- Rotary drag bits or fixed cutter bits are well known drill bits extensively used in subterranean rock drilling and boring operations. They typically consist of a bit body including a first end for connecting the body to a drill string and a second working end having a number of blades extending radially from the bit body, each blade carrying a cutting assembly for boring through the rock formation.
- the cutting assemblies each include a number of primary polycrystalline diamond compacts or cutting elements which provide for boring or drilling into the subterranean rock formation upon rotation of the drill bit.
- the drill bits also include so-called secondary cutters which are generally located behind the primary fixed cutters in critical wear areas on the drill bit wing location. They perform two basic functions. They protect the bit by providing a bearing surface in the event of the loss of a primary cutter, thus minimising the load transfer to following cutters and hence preventing a domino effect of cutter fracture or ring out.
- the secondary cutters also act as cutting elements in the event of the loss of a primary cutter. In view of these two basic functions, the secondary cutters are required to provide for high bearing forces and resistance to thermal induced cracking as well as resistance to high shear forces when acting as a cutting element. As a result of these non-complementary functions, conventional secondary cutters tend to be compromised in either one or both of these requirements.
- a rotary drag bit comprises:
- each blade including a cutting assembly
- each cutting assembly having a plurality of primary cutters orientated in the direction of rotation of the drill bit for drilling or boring into a subterranean rock formation, and a plurality of secondary cutters located behind the primary cutters in relation to the direction of rotation of the drag bit;
- one or more of the secondary cutters comprising a layer of superabrasive material bonded to a support substrate:
- the superabrasive layer having a major bearing surface on one side thereof and a major interface with the substrate on an opposite side thereof,
- the interface defining a stepped region in the peripheral zone of the cutter providing the cutter with a skirt or hoop of superabrasive extending into the substrate
- the or each secondary cutter being orientated in use to present the bearing surface to the rock formation and the secondary cutting edge in the direction of rotation of the rotary bit.
- the interface preferably has a central table or surface which is profiled.
- the profile of the table or surface is preferably a series of concentric rings, a plurality of dimples, or a cross-hatch structure.
- the periphery and base of the table are generally rounded such that the interface in the region of the hoop or skirt is one which generally has no discontinuities.
- the superabrasive material may be PCD, PCBN or CVD diamond.
- the superabrasive material is PCD, it preferably comprises at least 25 percent by mass of ultra-hard abrasive particles having an average particle size in the range 10 to 100 microns and consisting of particles having at least three different average particle sizes and at least 4 percent by mass ultra-hard abrasive particles having an average particle size of less than 10 microns.
- the invention extends to a tool component as defined above for use as a secondary cutter in a drill bit.
- Figure 1 is a perspective view of a drill bit of the invention
- Figure 2 is a cross sectional side view of a tool component of the invention for use in the drill bit of Figure 1 ;
- Figure 3a is a perspective view of a first embodiment of a substrate forming part of the tool component of Figure 2;
- Figure 3b is a cross sectional side view of the substrate of Figure 3a;
- Figure 4a is a perspective view of a second embodiment of a substrate forming part of the tool component of Figure 2;
- Figure 4b is a cross sectional side view of the substrate of Figure 4a;
- Figure 5a is a perspective view of a third embodiment of a substrate forming part of the tool component of Figure 2;
- Figure 5b is a cross sectional side view of the substrate of Figure 5a.
- a rotary drag bit or fixed bit cutter 10 consists of a bit body 12 having a working end 14 including a number of blades 16 extending radially from the central portion 18.
- Each blade 16 carries a row of primary cutters 20 orientated in the direction of rotation of the drill bit for drilling or boring into a subterranean rock formation.
- Each blade 16 also includes a row of secondary cutters 22 which are orientated generally normal to the axis of rotation of the drill bit.
- a secondary cutter 22 of the invention consists of a layer of superabrasive material 32 bonded to a support substrate 34.
- the superabrasive layer 32 which in this case is formed of polycrystalline diamond, has a first or upper bearing surface 36 and a second or lower interface surface 38.
- the upper surface 36 includes a peripheral edge 40 which provides a secondary cutting edge for the bit in use.
- the lower surface 38 is bonded to the support surface 42 of the substrate 34 to form an interfacial region 46.
- the superabrasive layer 32 includes a recess 48 for receiving a complementary projection or central table 50 extending from the substrate 34.
- a hoop or skirt of polycrystalline diamond 52 surrounds the table 50.
- the periphery 54 and base 56 of the table are rounded.
- the interface in the region of the hoop or skirt 52 has no discontinuities.
- the support substrate material will typically be of a cemented carbide, in particular tungsten carbide.
- the secondary cutter 22 is designed to prevent failures due to high shear forces. This is achieved by reducing the tensile axial residual stress that occurs at the periphery of the cutter close to the PCD / substrate interfacial region 46. As a result of the continuous uninterrupted hoop or skirt 52, the axial stresses are also minimised over the entire periphery of the superabrasive layer 32. Further, as a result of the recessed PCD layer, the surface area of the support surface 42 is increased, providing for greater load bearing capabilities in use.
- a common problem associated with primary cutters of the type having a PCD layer bonded to a substrate is that they are prone to interfacial failures, and much focus has been placed upon designing primary cutters to reduce these interfacial failures.
- the secondary cutters of the invention are forced into a cutting role, typically as a result of the failure of a primary cutter, these interfacial failures are also of concern.
- the preferred brute cutter of the invention provides for a so-called textured or profiled interface between the substrate and the PCD layer.
- a substrate 60 has an upper surface 62 which is checkered or cross hatched. As a result of this profiling or texturing of the surface 62, a greater surface area is provided than would be the case for a planar surface.
- the lower surface of the superabrasive layer (not shown) forms a complementary interface surface. This arrangement provides a mechanical interlocking between the superabrasive layer and the substrate.
- the substrate 70 in this case includes an upper surface 72 having a plurality of concentrically grooved rings 74.
- the substrate 80 in this embodiment has an upper surface 82 including a number of dimples 84 in a square raster formation.
- a further concern in relation to a secondary cutter of the invention relates to the rate of recession of the bearing surface relative to the wear of the primary cutter.
- the bearing surface must wear at the same rate or slightly faster than the primary cutter in order not to inhibit the primary cutter function. Balancing the rate of recession of the bearing surface with the peak wear of the primary cutter can be achieved in two ways. This can be achieved by balancing the wear resistance of the PCD layer or by balancing the area of the bearing surface.
- a secondary cutter with a Quadmodal superabrasive layer is preferred, particularly where the primary cutter is a cutter with a multimodal (with an average particle size of about 10 ⁇ m) / Quadmodal (multimodal material with an average particle size of about 25 ⁇ m) layer, or other multi-layer, multimodal configuration.
- Quadmodal superabrasives are disclosed in SA 94/3645, which is incorporated herein by reference.
- a quadmodal abrasive comprises at least 25 percent by mass of ultra-hard abrasive particles having an average particle size in the range 10 to 100 microns and consisting of particles having at least three different average particle sizes and at least 4 percent by mass ultra-hard abrasive particles having an average particle size of less than 10 microns.
- Using a Quadmodal layer for the secondary cutter is also advantageous due to the proven record thereof in terms of impact resistance. However, if such a layer is still too wear resistant, a courser multimodal material could be used, for example a multimodal material having an average particle size of about 35 ⁇ m to about 40 ⁇ m.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/546,541 US20070017710A1 (en) | 2003-02-26 | 2004-02-24 | Secondary cutting element for drill bit |
CA002517066A CA2517066A1 (en) | 2003-02-26 | 2004-02-24 | Secondary cutting element for drill bit |
EP04713952A EP1606488A1 (en) | 2003-02-26 | 2004-02-24 | Secondary cutting element for drill bit |
AU2004215118A AU2004215118A1 (en) | 2003-02-26 | 2004-02-24 | Secondary cutting element for drill bit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA2003/1571 | 2003-02-26 | ||
ZA200301571 | 2003-02-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004076800A1 true WO2004076800A1 (en) | 2004-09-10 |
Family
ID=32928214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2004/000472 WO2004076800A1 (en) | 2003-02-26 | 2004-02-24 | Secondary cutting element for drill bit |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070017710A1 (en) |
EP (1) | EP1606488A1 (en) |
AU (1) | AU2004215118A1 (en) |
CA (1) | CA2517066A1 (en) |
WO (1) | WO2004076800A1 (en) |
ZA (1) | ZA200506823B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007038208A1 (en) * | 2005-09-23 | 2007-04-05 | Baker Hughes Incorporated | Earth boring drill bits with casing component drill out capability, cutting elements for same, and methods of use |
WO2008015629A1 (en) * | 2006-07-31 | 2008-02-07 | Element Six (Production) (Pty) Ltd | Abrasive compacts |
US7900703B2 (en) | 2006-05-15 | 2011-03-08 | Baker Hughes Incorporated | Method of drilling out a reaming tool |
US7954571B2 (en) | 2007-10-02 | 2011-06-07 | Baker Hughes Incorporated | Cutting structures for casing component drillout and earth-boring drill bits including same |
US7954570B2 (en) | 2004-02-19 | 2011-06-07 | Baker Hughes Incorporated | Cutting elements configured for casing component drillout and earth boring drill bits including same |
US8006785B2 (en) | 2004-02-19 | 2011-08-30 | Baker Hughes Incorporated | Casing and liner drilling bits and reamers |
US8245797B2 (en) | 2007-10-02 | 2012-08-21 | Baker Hughes Incorporated | Cutting structures for casing component drillout and earth-boring drill bits including same |
EP3081738A1 (en) * | 2007-01-31 | 2016-10-19 | Halliburton Energy Services, Inc. | Rotary drill bits with protected cutting elements and methods |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6460631B2 (en) | 1999-08-26 | 2002-10-08 | Baker Hughes Incorporated | Drill bits with reduced exposure of cutters |
US7270199B2 (en) * | 2005-09-19 | 2007-09-18 | Hall David R | Cutting element with a non-shear stress relieving substrate interface |
US8141665B2 (en) | 2005-12-14 | 2012-03-27 | Baker Hughes Incorporated | Drill bits with bearing elements for reducing exposure of cutters |
US7814997B2 (en) | 2007-06-14 | 2010-10-19 | Baker Hughes Incorporated | Interchangeable bearing blocks for drill bits, and drill bits including same |
US20100163310A1 (en) * | 2008-12-31 | 2010-07-01 | Baker Hughes Incorporated | Method of manufacturing and repairing fixed-cutter drag-type rotary tools with cutting control structures |
US9309723B2 (en) | 2009-10-05 | 2016-04-12 | Baker Hughes Incorporated | Drill bits and tools for subterranean drilling, methods of manufacturing such drill bits and tools and methods of directional and off center drilling |
GB201309798D0 (en) * | 2013-05-31 | 2013-07-17 | Element Six Abrasives Sa | Superhard constructions & methods of making same |
CN103334700A (en) * | 2013-07-30 | 2013-10-02 | 南通奥里斯特机械有限公司 | Three-wing drag bit applied to petroleum drilling |
US10017390B2 (en) * | 2015-03-30 | 2018-07-10 | Diamond Innovations, Inc. | Polycrystalline diamond bodies incorporating fractionated distribution of diamond particles of different morphologies |
WO2017116660A1 (en) * | 2015-12-28 | 2017-07-06 | Smith International, Inc. | Polycrystalline diamond constructions with protective element |
CN113153164B (en) * | 2021-04-20 | 2024-02-23 | 金沙县仁德钻探工具有限公司 | Four-wing flat-top eight-tooth drill bit |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0626236A1 (en) * | 1993-05-27 | 1994-11-30 | De Beers Industrial Diamond Division (Proprietary) Limited | A method of making an abrasive compact |
US20010037901A1 (en) * | 1998-09-18 | 2001-11-08 | Bertagnolli Kenneth E. | Polycrystalline diamond compact cutter having a stress mitigating hoop at the periphery |
GB2367081A (en) * | 2000-09-26 | 2002-03-27 | Baker Hughes Inc | Superabrasive cutter having arcuate table-to-substrate interfaces |
US6401845B1 (en) * | 1998-04-16 | 2002-06-11 | Diamond Products International, Inc. | Cutting element with stress reduction |
US6408958B1 (en) * | 2000-10-23 | 2002-06-25 | Baker Hughes Incorporated | Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped |
WO2004007901A1 (en) * | 2002-07-10 | 2004-01-22 | Diamond Innovations, Inc. | Cutting tools with two-slope profile |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IE61697B1 (en) * | 1987-12-22 | 1994-11-16 | De Beers Ind Diamond | Abrasive product |
US5355969A (en) * | 1993-03-22 | 1994-10-18 | U.S. Synthetic Corporation | Composite polycrystalline cutting element with improved fracture and delamination resistance |
GB9412247D0 (en) * | 1994-06-18 | 1994-08-10 | Camco Drilling Group Ltd | Improvements in or relating to elements faced with superhard material |
US5564511A (en) * | 1995-05-15 | 1996-10-15 | Frushour; Robert H. | Composite polycrystalline compact with improved fracture and delamination resistance |
US5711702A (en) * | 1996-08-27 | 1998-01-27 | Tempo Technology Corporation | Curve cutter with non-planar interface |
US6330924B1 (en) * | 1996-09-25 | 2001-12-18 | David R. Hall | Superhard drill bit heel, gage, and cutting elements with reinforced periphery |
US5871060A (en) * | 1997-02-20 | 1999-02-16 | Jensen; Kenneth M. | Attachment geometry for non-planar drill inserts |
US6003623A (en) * | 1998-04-24 | 1999-12-21 | Dresser Industries, Inc. | Cutters and bits for terrestrial boring |
US5971087A (en) * | 1998-05-20 | 1999-10-26 | Baker Hughes Incorporated | Reduced residual tensile stress superabrasive cutters for earth boring and drill bits so equipped |
US6227319B1 (en) * | 1999-07-01 | 2001-05-08 | Baker Hughes Incorporated | Superabrasive cutting elements and drill bit so equipped |
US6488106B1 (en) * | 2001-02-05 | 2002-12-03 | Varel International, Inc. | Superabrasive cutting element |
US7108598B1 (en) * | 2001-07-09 | 2006-09-19 | U.S. Synthetic Corporation | PDC interface incorporating a closed network of features |
US6933049B2 (en) * | 2002-07-10 | 2005-08-23 | Diamond Innovations, Inc. | Abrasive tool inserts with diminished residual tensile stresses and their production |
US7243745B2 (en) * | 2004-07-28 | 2007-07-17 | Baker Hughes Incorporated | Cutting elements and rotary drill bits including same |
-
2004
- 2004-02-24 AU AU2004215118A patent/AU2004215118A1/en not_active Abandoned
- 2004-02-24 US US10/546,541 patent/US20070017710A1/en not_active Abandoned
- 2004-02-24 WO PCT/IB2004/000472 patent/WO2004076800A1/en not_active Application Discontinuation
- 2004-02-24 ZA ZA200506823A patent/ZA200506823B/en unknown
- 2004-02-24 EP EP04713952A patent/EP1606488A1/en not_active Withdrawn
- 2004-02-24 CA CA002517066A patent/CA2517066A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0626236A1 (en) * | 1993-05-27 | 1994-11-30 | De Beers Industrial Diamond Division (Proprietary) Limited | A method of making an abrasive compact |
US6401845B1 (en) * | 1998-04-16 | 2002-06-11 | Diamond Products International, Inc. | Cutting element with stress reduction |
US20010037901A1 (en) * | 1998-09-18 | 2001-11-08 | Bertagnolli Kenneth E. | Polycrystalline diamond compact cutter having a stress mitigating hoop at the periphery |
GB2367081A (en) * | 2000-09-26 | 2002-03-27 | Baker Hughes Inc | Superabrasive cutter having arcuate table-to-substrate interfaces |
US6408958B1 (en) * | 2000-10-23 | 2002-06-25 | Baker Hughes Incorporated | Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped |
WO2004007901A1 (en) * | 2002-07-10 | 2004-01-22 | Diamond Innovations, Inc. | Cutting tools with two-slope profile |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8191654B2 (en) | 2004-02-19 | 2012-06-05 | Baker Hughes Incorporated | Methods of drilling using differing types of cutting elements |
US8297380B2 (en) | 2004-02-19 | 2012-10-30 | Baker Hughes Incorporated | Casing and liner drilling shoes having integrated operational components, and related methods |
US7748475B2 (en) | 2004-02-19 | 2010-07-06 | Baker Hughes Incorporated | Earth boring drill bits with casing component drill out capability and methods of use |
US8225887B2 (en) | 2004-02-19 | 2012-07-24 | Baker Hughes Incorporated | Casing and liner drilling shoes with portions configured to fail responsive to pressure, and related methods |
US8167059B2 (en) | 2004-02-19 | 2012-05-01 | Baker Hughes Incorporated | Casing and liner drilling shoes having spiral blade configurations, and related methods |
US7954570B2 (en) | 2004-02-19 | 2011-06-07 | Baker Hughes Incorporated | Cutting elements configured for casing component drillout and earth boring drill bits including same |
US8225888B2 (en) | 2004-02-19 | 2012-07-24 | Baker Hughes Incorporated | Casing shoes having drillable and non-drillable cutting elements in different regions and related methods |
US8006785B2 (en) | 2004-02-19 | 2011-08-30 | Baker Hughes Incorporated | Casing and liner drilling bits and reamers |
US8205693B2 (en) | 2004-02-19 | 2012-06-26 | Baker Hughes Incorporated | Casing and liner drilling shoes having selected profile geometries, and related methods |
WO2007038208A1 (en) * | 2005-09-23 | 2007-04-05 | Baker Hughes Incorporated | Earth boring drill bits with casing component drill out capability, cutting elements for same, and methods of use |
US7900703B2 (en) | 2006-05-15 | 2011-03-08 | Baker Hughes Incorporated | Method of drilling out a reaming tool |
US8206474B2 (en) | 2006-07-31 | 2012-06-26 | Klaus Tank | Abrasive compacts |
WO2008015629A1 (en) * | 2006-07-31 | 2008-02-07 | Element Six (Production) (Pty) Ltd | Abrasive compacts |
EP3081738A1 (en) * | 2007-01-31 | 2016-10-19 | Halliburton Energy Services, Inc. | Rotary drill bits with protected cutting elements and methods |
US7954571B2 (en) | 2007-10-02 | 2011-06-07 | Baker Hughes Incorporated | Cutting structures for casing component drillout and earth-boring drill bits including same |
US8245797B2 (en) | 2007-10-02 | 2012-08-21 | Baker Hughes Incorporated | Cutting structures for casing component drillout and earth-boring drill bits including same |
US8177001B2 (en) | 2007-10-02 | 2012-05-15 | Baker Hughes Incorporated | Earth-boring tools including abrasive cutting structures and related methods |
Also Published As
Publication number | Publication date |
---|---|
EP1606488A1 (en) | 2005-12-21 |
CA2517066A1 (en) | 2004-09-10 |
ZA200506823B (en) | 2006-11-29 |
US20070017710A1 (en) | 2007-01-25 |
AU2004215118A1 (en) | 2004-09-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20070017710A1 (en) | Secondary cutting element for drill bit | |
US9957757B2 (en) | Cutting elements for drill bits for drilling subterranean formations and methods of forming such cutting elements | |
US6401844B1 (en) | Cutter with complex superabrasive geometry and drill bits so equipped | |
EP0688937B1 (en) | Improvements in or relating to elements faced with superhard material | |
US6189634B1 (en) | Polycrystalline diamond compact cutter having a stress mitigating hoop at the periphery | |
US6408958B1 (en) | Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped | |
US6202770B1 (en) | Superabrasive cutting element with enhanced durability and increased wear life and apparatus so equipped | |
CA2262264C (en) | Cutting element with interlocking feature | |
EP0918135B1 (en) | Polycrystalline diamond compact (pdc) cutter with improved cutting capability | |
EP0687799A1 (en) | Improvements in or relating to elements faced with superhard material | |
EP1385662B1 (en) | Abrasive tool inserts and their production | |
GB2328963A (en) | Varying cutter edge chamfers to reduce bit wear | |
US11021913B2 (en) | Direct casting of ultrahard insert in bit body | |
US6401845B1 (en) | Cutting element with stress reduction | |
EP0186408B1 (en) | Improvements in or relating to cutting elements for rotary drill bits | |
EP0962621B1 (en) | Preform cutting elements for rotary drill bits | |
US6412580B1 (en) | Superabrasive cutter with arcuate table-to-substrate interfaces | |
EP1052367B1 (en) | Preform cutting elements for rotary drill bits | |
CN112983286A (en) | Cutting tooth and drill bit with same | |
CA3165503A1 (en) | Cutting element with improved mechanical efficiency | |
US7097551B2 (en) | Cutting tools with two-slope profile | |
CN114763734A (en) | Cutting element and drill bit | |
IE20010903A1 (en) | Cutting element with stress reduction |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2517066 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200506823 Country of ref document: ZA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004215118 Country of ref document: AU |
|
ENP | Entry into the national phase |
Ref document number: 2004215118 Country of ref document: AU Date of ref document: 20040224 Kind code of ref document: A |
|
WWP | Wipo information: published in national office |
Ref document number: 2004215118 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004713952 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2004713952 Country of ref document: EP |
|
DPEN | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed from 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2007017710 Country of ref document: US Ref document number: 10546541 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 10546541 Country of ref document: US |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2004713952 Country of ref document: EP |