CA1124708A - Process for the manufacture of a drill head having wear-resistant elements - Google Patents
Process for the manufacture of a drill head having wear-resistant elementsInfo
- Publication number
- CA1124708A CA1124708A CA299,524A CA299524A CA1124708A CA 1124708 A CA1124708 A CA 1124708A CA 299524 A CA299524 A CA 299524A CA 1124708 A CA1124708 A CA 1124708A
- Authority
- CA
- Canada
- Prior art keywords
- powder
- drill head
- shank
- mold
- core
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
-
- 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/56—Button-type inserts
Abstract
\
ABSTRACT
The method of manufacturing a drill head by embedding the shank portions of hard, wear-resistant cutting elements in a mold containing metal powder, cold isostatically compacting the powder and shank portions to form the core part of the drill head, and hot isostatically compressing this core part to completely densify same.
ABSTRACT
The method of manufacturing a drill head by embedding the shank portions of hard, wear-resistant cutting elements in a mold containing metal powder, cold isostatically compacting the powder and shank portions to form the core part of the drill head, and hot isostatically compressing this core part to completely densify same.
Description
~l.Z4708 The invention relates to a drill head including hard, wear-resistant elements projecting from the surface thereof, the elements compris-ing a cutting tip and a shaft, and method of making same.
Such drill heads are known from the literature, e.g. United States Patent 2,687,875. Fastened to drilling tools such drill heads are suitable for forming apertures in hard materials or holes and cavities in the earth.
For this purpose a drill head is manufactured from a hard steel body into which very precise apertures must be machined so as to receive a shank or shaft portion of an element in a press fit. This known process of manufacture has hitherto had the restriction that the shape of the shank portion oE the element, has had to be cylindrical or of similar form. Apart from the expensive machining of the hard core body which is necessary there is the additional practical disadvantage that the wear-resistant elements, because of the relatively large external forces acting on them, are prematurely loosened from their cylindrical or tubular mountings so that drilling is impeded or even becomes impossible.
The invention introduces a process whereby it is now possible to obtain a drill head in which the abovementioned necessary restrictions in the shape of the shank or shaft and the associated disadvantage of premature loosening of the cutting elements from the core body no longer apply.
According to one aspect the invention is in a process for manufacturing a drill head having a core and hard, wear-resistant cutting elements, each cutting element comprising a shank with a base part at one end and a cutting tip at the opposite end, said base part and at least a portion of said shank being embedded in said core and hereinafter designated embedded section, with said cutting tip projecting outward beyond the surface of said core, the process comprising the steps: a - filling with a metal powder a compressible mold which generally defines said core, b - forming said base part of a typical cutting element to have a diameter greater than the diameter of the shank, c - embedding said embedded sections of said cutting elements in said powder, d - locating said embedded sections of said cutting elements in said powder in the mold in essentially exactly the final positions . " ~.
- 1 - ~
O~
they will have after said step of compacting, e - cold isostatically compacting said mold and included powder and embedded sections, thereby precisely forming said drill head and precisely locating said cutting elements therein, and f - removing said drill head from said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
According to another aspect the invention is in a process for manufacturing a drill head having a core part with hard wear-resistant cutting elements each cutting element comprising a shank part embedded in said core part and a cutting tip at one end of the shank part that projects outward from the surface of said core part, the process comprising the steps:
(a) filling with a metal powder a compressible mold which generally defines said core part, (b) forming the shank of each of said cutting elements so that its diameter at at least one point along its length is greater than its diameter at some other point along its length, (c) embedding the shank part of each of said cutting elements in said powder, (d) locating said shank parts of said cutting elements in said powder in the mold in essentially exactly the final position they will have after said step of compacting, (e) cold isostatically compacting said mold and included powder and embedded shank parts thereby precisely forming said drill head and precisely locating said cutting elements therein, and (f) removing said drill head :Erom said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
The invention will be hereinafter described with reference to drawings, in which:
Figure 1 shows a portion of a rotatable drill head suitable for drilling the earth's crust.
Figures 2 and 3 show, on a larger scale, embodiments of the hard, wear-resistant ele~ents each with a rounded drill tip such as may be used in a drill head of the invention.
Figure 4 shows a portion of another type of rotatable drill head for drilling into rock.
~ - 2 -1~4708 Figure 5 shows a portion of a rotatable drill head provided with a cutter.
In Figure 1 a conical drill element or core body 3 is mounted on support 1 of a rotatable drill head 2 by bearing 4. The drill element 3 is made from metal powder 5 in accordance with the invention. The hard, wear-resistant elements 6, 7 or 8 which project from the surface are fastened in at the same time as the drill element is produced. Manufacture is preferably effected by filling the mould with metal powder 5, embedding the base part 12 and a portion of the shank of the elements in the powder and locating these elements in the final position. The tops of the elements are held in position by the rubber mold. The rubber mold or template containing the metal powder 5 and the elements 6 or 7 is then isostatically compacted. This method ensures the exact positioning of the hard, wear-resistant elements in the drilling element or core body 3. Compaction is by isostatic compacting. After compacting - in the first instance cold compacting - the rubber mould is removed and the "solid" conical drill element 3 is provided with the wear-resistant elements of, for example, the embodiments of Figures 2 and 3.
Because of the special design of the shank portion of the wear-resistant elements 6, 7 or 8 ~see Figures 2, 3 and 4~ a strong bond is created between these elements 6, 7 or 8 and the compacted drill element or core body 3. Resistance to dislocation is achieved by means of resistance in-creasing means such as grooves 10, divergent shapes of stem 11 or projections - 2a -'i~' 12. To achieve greater density of drill element 3, hot isostatic compacting is often necessary so that mechanical properties equivalent to those of steel are achieved. However, not only is a better dislocation resistant bond between the hard, wear-resistant elements 6, 7 or 8 and the core body 3 obtained,but it is also possible to avoid the disadvantage of accurately machining holes into the core body to receive the shaft portion 9 of the wear-resistant elements. It should be noted that according to Figure 3 the base of the tapered shank or shaft of the element 7 has a foot 12 partly projecting from it. This further strengthens the bond between element 7 and core body 3.
Figure 4 shows a cross-section of a drill head 13 which is driven by compressed air, ~see arrow 14) the air being able to escape through eccen-trically located apertures 15 in the face 16 of the drill. On the surface of this face are mounted the hard wear-resistant elements 8, the shank or shaft 9 of each of which is divergent or tapering as shown.
Figure 5 shows another embodiment of a portion 17 of a drill head according to the invention which is made by cold and/or hot isostatic compact-ing from metal powder 5. In this embodiment a hard, wear-resistant cutter 18 which is provided with a relatively sharp cutting edge 19 is mounted in the core body. The cutter 18 is provided with surfaces 20 which diverge from cutting edge 19, so as to resist dislocation of the cutter 18 from the core bodyO
3 .
Such drill heads are known from the literature, e.g. United States Patent 2,687,875. Fastened to drilling tools such drill heads are suitable for forming apertures in hard materials or holes and cavities in the earth.
For this purpose a drill head is manufactured from a hard steel body into which very precise apertures must be machined so as to receive a shank or shaft portion of an element in a press fit. This known process of manufacture has hitherto had the restriction that the shape of the shank portion oE the element, has had to be cylindrical or of similar form. Apart from the expensive machining of the hard core body which is necessary there is the additional practical disadvantage that the wear-resistant elements, because of the relatively large external forces acting on them, are prematurely loosened from their cylindrical or tubular mountings so that drilling is impeded or even becomes impossible.
The invention introduces a process whereby it is now possible to obtain a drill head in which the abovementioned necessary restrictions in the shape of the shank or shaft and the associated disadvantage of premature loosening of the cutting elements from the core body no longer apply.
According to one aspect the invention is in a process for manufacturing a drill head having a core and hard, wear-resistant cutting elements, each cutting element comprising a shank with a base part at one end and a cutting tip at the opposite end, said base part and at least a portion of said shank being embedded in said core and hereinafter designated embedded section, with said cutting tip projecting outward beyond the surface of said core, the process comprising the steps: a - filling with a metal powder a compressible mold which generally defines said core, b - forming said base part of a typical cutting element to have a diameter greater than the diameter of the shank, c - embedding said embedded sections of said cutting elements in said powder, d - locating said embedded sections of said cutting elements in said powder in the mold in essentially exactly the final positions . " ~.
- 1 - ~
O~
they will have after said step of compacting, e - cold isostatically compacting said mold and included powder and embedded sections, thereby precisely forming said drill head and precisely locating said cutting elements therein, and f - removing said drill head from said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
According to another aspect the invention is in a process for manufacturing a drill head having a core part with hard wear-resistant cutting elements each cutting element comprising a shank part embedded in said core part and a cutting tip at one end of the shank part that projects outward from the surface of said core part, the process comprising the steps:
(a) filling with a metal powder a compressible mold which generally defines said core part, (b) forming the shank of each of said cutting elements so that its diameter at at least one point along its length is greater than its diameter at some other point along its length, (c) embedding the shank part of each of said cutting elements in said powder, (d) locating said shank parts of said cutting elements in said powder in the mold in essentially exactly the final position they will have after said step of compacting, (e) cold isostatically compacting said mold and included powder and embedded shank parts thereby precisely forming said drill head and precisely locating said cutting elements therein, and (f) removing said drill head :Erom said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
The invention will be hereinafter described with reference to drawings, in which:
Figure 1 shows a portion of a rotatable drill head suitable for drilling the earth's crust.
Figures 2 and 3 show, on a larger scale, embodiments of the hard, wear-resistant ele~ents each with a rounded drill tip such as may be used in a drill head of the invention.
Figure 4 shows a portion of another type of rotatable drill head for drilling into rock.
~ - 2 -1~4708 Figure 5 shows a portion of a rotatable drill head provided with a cutter.
In Figure 1 a conical drill element or core body 3 is mounted on support 1 of a rotatable drill head 2 by bearing 4. The drill element 3 is made from metal powder 5 in accordance with the invention. The hard, wear-resistant elements 6, 7 or 8 which project from the surface are fastened in at the same time as the drill element is produced. Manufacture is preferably effected by filling the mould with metal powder 5, embedding the base part 12 and a portion of the shank of the elements in the powder and locating these elements in the final position. The tops of the elements are held in position by the rubber mold. The rubber mold or template containing the metal powder 5 and the elements 6 or 7 is then isostatically compacted. This method ensures the exact positioning of the hard, wear-resistant elements in the drilling element or core body 3. Compaction is by isostatic compacting. After compacting - in the first instance cold compacting - the rubber mould is removed and the "solid" conical drill element 3 is provided with the wear-resistant elements of, for example, the embodiments of Figures 2 and 3.
Because of the special design of the shank portion of the wear-resistant elements 6, 7 or 8 ~see Figures 2, 3 and 4~ a strong bond is created between these elements 6, 7 or 8 and the compacted drill element or core body 3. Resistance to dislocation is achieved by means of resistance in-creasing means such as grooves 10, divergent shapes of stem 11 or projections - 2a -'i~' 12. To achieve greater density of drill element 3, hot isostatic compacting is often necessary so that mechanical properties equivalent to those of steel are achieved. However, not only is a better dislocation resistant bond between the hard, wear-resistant elements 6, 7 or 8 and the core body 3 obtained,but it is also possible to avoid the disadvantage of accurately machining holes into the core body to receive the shaft portion 9 of the wear-resistant elements. It should be noted that according to Figure 3 the base of the tapered shank or shaft of the element 7 has a foot 12 partly projecting from it. This further strengthens the bond between element 7 and core body 3.
Figure 4 shows a cross-section of a drill head 13 which is driven by compressed air, ~see arrow 14) the air being able to escape through eccen-trically located apertures 15 in the face 16 of the drill. On the surface of this face are mounted the hard wear-resistant elements 8, the shank or shaft 9 of each of which is divergent or tapering as shown.
Figure 5 shows another embodiment of a portion 17 of a drill head according to the invention which is made by cold and/or hot isostatic compact-ing from metal powder 5. In this embodiment a hard, wear-resistant cutter 18 which is provided with a relatively sharp cutting edge 19 is mounted in the core body. The cutter 18 is provided with surfaces 20 which diverge from cutting edge 19, so as to resist dislocation of the cutter 18 from the core bodyO
3 .
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a process for manufacturing a drill head having a core and hard, wear-resistant cutting elements, each cutting element comprising a shank with a base part at one end and a cutting tip at the opposite end, said base part and at least a portion of said shank being embedded in said core and hereinafter designated embedded section, with said cutting tip projecting outward beyond the surface of said core, the process comprising the steps:
a - filling with a metal powder a compressible mold which generally defines said core, b - forming said base part of a typical cutting element to have a diameter greater than the diameter of the shank, c - embedding said embedded sections of said cutting elements in said powder, d - locating said embedded sections of said cutting elements in said powder in the mold in essentially exactly the final positions they will have after said step of compacting.
e - cold isostatically compacting said mold and included powder and embedded sections, thereby precisely forming said drill head and precisely locating said cutting elements therein, and f - removing said drill head from said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
a - filling with a metal powder a compressible mold which generally defines said core, b - forming said base part of a typical cutting element to have a diameter greater than the diameter of the shank, c - embedding said embedded sections of said cutting elements in said powder, d - locating said embedded sections of said cutting elements in said powder in the mold in essentially exactly the final positions they will have after said step of compacting.
e - cold isostatically compacting said mold and included powder and embedded sections, thereby precisely forming said drill head and precisely locating said cutting elements therein, and f - removing said drill head from said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
2. In a process for manufacturing a drill head having a core and hard, wear-resistant cutting elements, each cutting element comprising a shank with a base part at one end and a cutting tip at the opposite end, said base part and at least a portion of said shank being embedded in said core and hereinafter designated embedded section, with said cutting tip projecting outward beyond the surface of said core, the process comprising the steps:
a - filling with a metal powder a compressible mold which generally defines said core, b - forming the shank part of each of said cutting elements to have a tapered shape that diverges in the direction from said cutting tip toward said shank part, c - embedding said embedded sections of said cutting elements in said powder, d - locating said embedded sections of said cutting elements in said powder in the mold in essentially exactly the final positions they will have after said step of compacting, e - cold isostatically compacting said mold and included powder and embedded sections, thereby precisely forming said drill head and precisely locating said cutting elements therein, and f - removing said drill head from said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
a - filling with a metal powder a compressible mold which generally defines said core, b - forming the shank part of each of said cutting elements to have a tapered shape that diverges in the direction from said cutting tip toward said shank part, c - embedding said embedded sections of said cutting elements in said powder, d - locating said embedded sections of said cutting elements in said powder in the mold in essentially exactly the final positions they will have after said step of compacting, e - cold isostatically compacting said mold and included powder and embedded sections, thereby precisely forming said drill head and precisely locating said cutting elements therein, and f - removing said drill head from said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
3. In a process for manufacturing a drill head having a core and hard, wear-resistant cutting elements, each cutting element having a central longitudinal axis and comprising a shank with a base part at one end and a cutting tip at the opposite end, said base part and at least a portion of said shank being embedded in said core and hereinafter designated embedded section, with said cutting tip projecting outward beyond the surface of said core, the process comprising the steps:
a - filling with a metal powder a compressible mold which generally defines said core, b - providing projections that extend from said shank part transversely of said axis, c - embedding said embedded sections of said cutting elements in said powder, d - locating said embedded sections of said cutting elements in said powder in the mold in essentially exactly the final positions they will have after said step of compacting, e - cold isostatically compacting said mold and included powder and embedded sections, thereby precisely forming said drill head and precisely locating said cutting elements therein, and f - removing said drill head from said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
a - filling with a metal powder a compressible mold which generally defines said core, b - providing projections that extend from said shank part transversely of said axis, c - embedding said embedded sections of said cutting elements in said powder, d - locating said embedded sections of said cutting elements in said powder in the mold in essentially exactly the final positions they will have after said step of compacting, e - cold isostatically compacting said mold and included powder and embedded sections, thereby precisely forming said drill head and precisely locating said cutting elements therein, and f - removing said drill head from said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
4. In a process for manufacturing a drill head having a core part with hard wear-resistant cutting elements each cutting element comprising a shank part embedded in said core part and a cutting tip at one end of the shank part that projects outward from the surface of said core part, the process comprising the steps:
a - filling with a metal powder a compressible mold which generally defines said core part, b - forming the shank of each of said cutting elements so that its diameter at at least one point along its length is greater than its diameter at some other point along its length, c - embedding the shank part of each of said cutting elements in said powder, d - locating said shank parts of said cutting elements in said powder in the mold in essentially exactly the final position they will have after said step of compacting, e - cold isostatically compacting said mold and included powder and embedded shank parts thereby precisely forming said drill head and precisely locating said cutting elements therein, and f - removing said drill head from said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
a - filling with a metal powder a compressible mold which generally defines said core part, b - forming the shank of each of said cutting elements so that its diameter at at least one point along its length is greater than its diameter at some other point along its length, c - embedding the shank part of each of said cutting elements in said powder, d - locating said shank parts of said cutting elements in said powder in the mold in essentially exactly the final position they will have after said step of compacting, e - cold isostatically compacting said mold and included powder and embedded shank parts thereby precisely forming said drill head and precisely locating said cutting elements therein, and f - removing said drill head from said mold, and subsequently hot isostatically compacting said drill head until said powder is completely densified.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7703234 | 1977-03-25 | ||
| NL7703234A NL7703234A (en) | 1977-03-25 | 1977-03-25 | METHOD FOR MANUFACTURING A DRILL CHUCK INCLUDING HARD WEAR-RESISTANT ELEMENTS, AND DRILL CHAPTER MADE ACCORDING TO THE METHOD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1124708A true CA1124708A (en) | 1982-06-01 |
Family
ID=19828236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA299,524A Expired CA1124708A (en) | 1977-03-25 | 1978-03-22 | Process for the manufacture of a drill head having wear-resistant elements |
Country Status (12)
| Country | Link |
|---|---|
| US (2) | US4276788A (en) |
| JP (1) | JPS53119488A (en) |
| AU (1) | AU515427B2 (en) |
| BR (1) | BR7801796A (en) |
| CA (1) | CA1124708A (en) |
| DE (1) | DE2812590A1 (en) |
| FR (1) | FR2384574A1 (en) |
| GB (1) | GB1597678A (en) |
| IT (2) | IT7819759A0 (en) |
| NL (1) | NL7703234A (en) |
| SE (1) | SE7802965L (en) |
| ZA (1) | ZA781327B (en) |
Families Citing this family (42)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU499558B1 (en) * | 1977-06-18 | 1979-04-26 | Fuji Dia Co. Ltd. | Diamond tool manufacture |
| AT362978B (en) * | 1979-07-20 | 1981-06-25 | Ver Edelstahlwerke Ag | METHOD FOR THE PRODUCTION OF WORK TOOLS CONTAINED WITH HARD METAL OR DIAMOND INSERTS FOR STONE OR MINERALS |
| NL7908745A (en) * | 1979-12-04 | 1981-07-01 | Skf Ind Trading & Dev | METHOD FOR MANUFACTURING AN ARTICLE APPLIED BY THERMAL SPRAYING AND OBJECT, IN PARTICULAR A DRILLING CHISEL, OBTAINED BY THIS METHOD |
| US4398952A (en) * | 1980-09-10 | 1983-08-16 | Reed Rock Bit Company | Methods of manufacturing gradient composite metallic structures |
| US4372404A (en) * | 1980-09-10 | 1983-02-08 | Reed Rock Bit Company | Cutting teeth for rolling cutter drill bit |
| US4368788A (en) * | 1980-09-10 | 1983-01-18 | Reed Rock Bit Company | Metal cutting tools utilizing gradient composites |
| SE423562B (en) * | 1980-11-13 | 1982-05-10 | Cerac Inst Sa | PROCEDURE FOR PREPARING A STABLE BODY INCLUDING HARD MATERIAL INSTALLATIONS |
| US4365679A (en) * | 1980-12-02 | 1982-12-28 | Skf Engineering And Research Centre, B.V. | Drill bit |
| US4453605A (en) * | 1981-04-30 | 1984-06-12 | Nl Industries, Inc. | Drill bit and method of metallurgical and mechanical holding of cutters in a drill bit |
| DE3300357C2 (en) * | 1983-01-07 | 1985-01-10 | Christensen, Inc., Salt Lake City, Utah | Method and device for manufacturing cutting elements for deep drilling bits |
| US4497520A (en) * | 1983-04-29 | 1985-02-05 | Gte Products Corporation | Rotatable cutting bit |
| EP0138155B1 (en) * | 1983-10-07 | 1988-12-28 | Kawasaki Jukogyo Kabushiki Kaisha | Rock bit cone and method of manufacturing the same |
| US4593776A (en) * | 1984-03-28 | 1986-06-10 | Smith International, Inc. | Rock bits having metallurgically bonded cutter inserts |
| US4554130A (en) * | 1984-10-01 | 1985-11-19 | Cdp, Ltd. | Consolidation of a part from separate metallic components |
| US4597456A (en) * | 1984-07-23 | 1986-07-01 | Cdp, Ltd. | Conical cutters for drill bits, and processes to produce same |
| GB8725671D0 (en) * | 1987-11-03 | 1987-12-09 | Reed Tool Co | Manufacture of rotary drill bits |
| ZA93584B (en) * | 1992-05-27 | 1993-09-01 | De Beers Ind Diamond | Abrasive tools. |
| DE4431563A1 (en) * | 1994-09-05 | 1996-03-07 | Kloeckner Humboldt Deutz Ag | Wear-resistant surface armor for the rollers of high-pressure roller presses for pressure reduction of granular goods (documents for P 44 44 337.4 given) |
| US5662183A (en) * | 1995-08-15 | 1997-09-02 | Smith International, Inc. | High strength matrix material for PDC drag bits |
| US6170576B1 (en) * | 1995-09-22 | 2001-01-09 | Weatherford/Lamb, Inc. | Mills for wellbore operations |
| US5967248A (en) * | 1997-10-14 | 1999-10-19 | Camco International Inc. | Rock bit hardmetal overlay and process of manufacture |
| DE19821147C2 (en) * | 1998-05-12 | 2002-02-07 | Betek Bergbau & Hartmetall | Attack cutting tools |
| US7815616B2 (en) | 2002-09-16 | 2010-10-19 | Boehringer Technologies, L.P. | Device for treating a wound |
| US20050211475A1 (en) | 2004-04-28 | 2005-09-29 | Mirchandani Prakash K | Earth-boring bits |
| US9428822B2 (en) | 2004-04-28 | 2016-08-30 | Baker Hughes Incorporated | Earth-boring tools and components thereof including material having hard phase in a metallic binder, and metallic binder compositions for use in forming such tools and components |
| US20060024140A1 (en) * | 2004-07-30 | 2006-02-02 | Wolff Edward C | Removable tap chasers and tap systems including the same |
| US20060237236A1 (en) * | 2005-04-26 | 2006-10-26 | Harold Sreshta | Composite structure having a non-planar interface and method of making same |
| US8637127B2 (en) | 2005-06-27 | 2014-01-28 | Kennametal Inc. | Composite article with coolant channels and tool fabrication method |
| US7687156B2 (en) | 2005-08-18 | 2010-03-30 | Tdy Industries, Inc. | Composite cutting inserts and methods of making the same |
| WO2007127680A1 (en) | 2006-04-27 | 2007-11-08 | Tdy Industries, Inc. | Modular fixed cutter earth-boring bits, modular fixed cutter earth-boring bit bodies, and related methods |
| CA2663519A1 (en) | 2006-10-25 | 2008-05-02 | Tdy Industries, Inc. | Articles having improved resistance to thermal cracking |
| US8790439B2 (en) | 2008-06-02 | 2014-07-29 | Kennametal Inc. | Composite sintered powder metal articles |
| US8025112B2 (en) | 2008-08-22 | 2011-09-27 | Tdy Industries, Inc. | Earth-boring bits and other parts including cemented carbide |
| US8272816B2 (en) | 2009-05-12 | 2012-09-25 | TDY Industries, LLC | Composite cemented carbide rotary cutting tools and rotary cutting tool blanks |
| US8201610B2 (en) * | 2009-06-05 | 2012-06-19 | Baker Hughes Incorporated | Methods for manufacturing downhole tools and downhole tool parts |
| US8308096B2 (en) | 2009-07-14 | 2012-11-13 | TDY Industries, LLC | Reinforced roll and method of making same |
| US9643236B2 (en) | 2009-11-11 | 2017-05-09 | Landis Solutions Llc | Thread rolling die and method of making same |
| US8490674B2 (en) | 2010-05-20 | 2013-07-23 | Baker Hughes Incorporated | Methods of forming at least a portion of earth-boring tools |
| RU2012155100A (en) | 2010-05-20 | 2014-06-27 | Бейкер Хьюз Инкорпорейтед | METHOD FOR FORMING A LESS PART OF A DRILLING TOOL AND FORMED PRODUCT THEREOF |
| MX340467B (en) | 2010-05-20 | 2016-07-08 | Baker Hughes Incorporated * | Methods of forming at least a portion of earth-boring tools, and articles formed by such methods. |
| US8800848B2 (en) | 2011-08-31 | 2014-08-12 | Kennametal Inc. | Methods of forming wear resistant layers on metallic surfaces |
| US9016406B2 (en) | 2011-09-22 | 2015-04-28 | Kennametal Inc. | Cutting inserts for earth-boring bits |
Family Cites Families (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US970002A (en) * | 1908-08-18 | 1910-09-13 | Huff Electrostatic Separator Company | Process of separation. |
| US1045954A (en) * | 1910-12-21 | 1912-12-03 | Harry R Decker | Hole-straightener. |
| DE590707C (en) * | 1929-04-23 | 1934-01-09 | Aeg | Drill bits, in particular rock drill bits, in which the diamonds are embedded in the surface of a crown formed from sintered metal |
| US1848182A (en) * | 1930-06-30 | 1932-03-08 | Koebel Wagner Diamond Corp | Art of setting diamonds |
| US2152738A (en) * | 1936-04-17 | 1939-04-04 | Champion Spark Plug Co | Method of and apparatus for molding materials |
| US2299207A (en) * | 1941-02-18 | 1942-10-20 | Bevil Corp | Method of making cutting tools |
| CH266169A (en) * | 1946-02-19 | 1950-01-15 | Edward Van Moppes Lewis | A method of manufacturing a tool comprising at least a diamond part carried by a metal frame and a tool manufactured by this method. |
| GB643790A (en) * | 1947-10-27 | 1950-09-27 | Rip Bits Ltd | Improvements in or relating to drill-bits or drill-steels having hard metal tips suitable for rock drilling |
| US2582231A (en) * | 1949-02-05 | 1952-01-15 | Wheel Trueing Tool Co | Abrasive tool and method of making same |
| US2614813A (en) * | 1949-07-08 | 1952-10-21 | Ingersoll Rand Co | Rock drilling tool |
| US2669432A (en) * | 1949-10-17 | 1954-02-16 | Hughes Tool Co | Roller cutter |
| US2743495A (en) * | 1951-05-07 | 1956-05-01 | Nat Supply Co | Method of making a composite cutter |
| US3173314A (en) * | 1961-02-15 | 1965-03-16 | Norton Co | Method of making core drills |
| GB996796A (en) * | 1963-03-09 | 1965-06-30 | P & V Mining & Engineering Ltd | Improvements in and relating to tools for operating in rock, coal and other material |
| FR1398900A (en) * | 1964-04-02 | 1965-05-14 | Precidia | Process for manufacturing diamond tools, more especially for drilling, and tools obtained by the process |
| US3318399A (en) * | 1965-03-22 | 1967-05-09 | Exxon Production Research Co | Diamond bits and similar tools |
| US3389761A (en) * | 1965-12-06 | 1968-06-25 | Dresser Ind | Drill bit and inserts therefor |
| US3453719A (en) * | 1967-03-06 | 1969-07-08 | Shell Oil Co | Manufacturing diamond bits |
| US3563325A (en) * | 1968-09-16 | 1971-02-16 | Kennametal Inc | Percussion bit |
| US3495670A (en) * | 1968-09-16 | 1970-02-17 | Ingersoll Rand Co | Drill bit and method and apparatus for making same |
| US3605923A (en) * | 1969-01-24 | 1971-09-20 | Shell Oil Co | Diamond bits having diamonds positioned in concentric circles on the drilling face |
| US4054449A (en) * | 1970-12-04 | 1977-10-18 | Federal-Mogul Corporation | Process of making a composite heavy-duty powdered machine element |
| FR2147791A1 (en) * | 1971-07-01 | 1973-03-11 | Precidia | Bore-hole drill - with cutting element faces disposed at pre determined optimum angles to drilling axis |
| US3852874A (en) * | 1972-03-02 | 1974-12-10 | Smith Williston Inc | Method of inserting buttons in a drilling head |
| NL7211352A (en) * | 1972-05-08 | 1973-11-12 | ||
| SU483863A1 (en) * | 1973-01-03 | 1980-06-15 | Всесоюзный Научно-Исследоваельский И Проектный Институт Тугоплавких Металлов И Твердых Сплавов | Method of making diamond tool |
| SU468994A1 (en) * | 1974-02-15 | 1975-04-30 | Институт горного дела | Cylindrical carbide insert for drilling tools |
| DE2460013C3 (en) * | 1974-12-19 | 1978-08-24 | Sintermetallwerk Krebsoege Gmbh, 5608 Radevormwald | Process for the production of metallic moldings |
| US3997011A (en) * | 1975-05-27 | 1976-12-14 | Staroba Otto R | Button drill bit structure |
| JPS5114449A (en) * | 1975-06-18 | 1976-02-04 | Hitachi Ltd | HEAADORAIYAA |
| US4098362A (en) * | 1976-11-30 | 1978-07-04 | General Electric Company | Rotary drill bit and method for making same |
-
1977
- 1977-03-25 NL NL7703234A patent/NL7703234A/en not_active Application Discontinuation
-
1978
- 1978-01-30 IT IT7819759A patent/IT7819759A0/en unknown
- 1978-03-02 AU AU33774/78A patent/AU515427B2/en not_active Expired
- 1978-03-07 ZA ZA00781327A patent/ZA781327B/en unknown
- 1978-03-13 IT IT21142/78A patent/IT1109823B/en active
- 1978-03-15 SE SE7802965A patent/SE7802965L/en unknown
- 1978-03-17 US US05/887,931 patent/US4276788A/en not_active Expired - Lifetime
- 1978-03-22 CA CA299,524A patent/CA1124708A/en not_active Expired
- 1978-03-22 BR BR7801796A patent/BR7801796A/en unknown
- 1978-03-22 DE DE19782812590 patent/DE2812590A1/en not_active Ceased
- 1978-03-22 FR FR7808399A patent/FR2384574A1/en active Granted
- 1978-03-23 GB GB11699/78A patent/GB1597678A/en not_active Expired
- 1978-03-24 JP JP3317978A patent/JPS53119488A/en active Pending
-
1980
- 1980-11-20 US US06/208,533 patent/US4520882A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| IT7819759A0 (en) | 1978-01-30 |
| SE7802965L (en) | 1978-09-26 |
| AU3377478A (en) | 1979-09-06 |
| US4520882A (en) | 1985-06-04 |
| FR2384574B1 (en) | 1982-12-03 |
| FR2384574A1 (en) | 1978-10-20 |
| US4276788A (en) | 1981-07-07 |
| GB1597678A (en) | 1981-09-09 |
| BR7801796A (en) | 1978-10-24 |
| NL7703234A (en) | 1978-09-27 |
| DE2812590A1 (en) | 1978-09-28 |
| IT7821142A0 (en) | 1978-03-13 |
| AU515427B2 (en) | 1981-04-02 |
| IT1109823B (en) | 1985-12-23 |
| JPS53119488A (en) | 1978-10-18 |
| ZA781327B (en) | 1979-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |