WO2008086280A1 - Intermetallic bonded diamond (ibd) cutting elements - Google Patents

Intermetallic bonded diamond (ibd) cutting elements Download PDF

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Publication number
WO2008086280A1
WO2008086280A1 PCT/US2008/050395 US2008050395W WO2008086280A1 WO 2008086280 A1 WO2008086280 A1 WO 2008086280A1 US 2008050395 W US2008050395 W US 2008050395W WO 2008086280 A1 WO2008086280 A1 WO 2008086280A1
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WO
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Patent type
Prior art keywords
substrate
interface region
bonding interface
shape
cutting element
Prior art date
Application number
PCT/US2008/050395
Other languages
French (fr)
Inventor
William W. King
Original Assignee
Halliburton Energy Services, 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

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F7/00Manufacture 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
    • B22F7/06Manufacture 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
    • B22F7/062Manufacture 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 involving the connection or repairing of preformed parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F7/00Manufacture 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
    • B22F7/06Manufacture 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
    • B22F7/08Manufacture 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 with one or more parts not made from powder
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C26/00Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
    • 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
    • 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
    • E21B10/54Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E21B10/55Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements with blades having preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F5/00Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001Cutting tools, earth boring or grinding tool other than table ware
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F2999/00Aspects linked to processes or compositions used in powder metallurgy
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C2204/00End product comprising different layers, coatings or parts of cermet

Abstract

A cutting element may include a substrate having a bonding interface region, and an intermetallic bonded diamond (IBD) element bonded to the bonding interface region of the substrate. In some embodiments, the bonding interface region of the substrate may have a non-axi-symmetrical shape and/or may be symmetrical about only one plane or about zero planes. In some embodiments, the bonding interface region of the substrate may have a shape of a tube, a beveled tube, a tube with one or more internal support structures, a scoop, a plow, a concave shape, a honeycombed shape, or other irregular or complex shape.

Description

INTERMETALLIC BONDED DIAMOND (IBD) CUTTING ELEMENTS

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the benefit under 35 U. S. C. § 119 (e) of U.S. Provisional Application No. 60/883,884, entitled "Intermetallic Bonded Diamond (IBD) Cutting Elements," filed January 8, 2007.

TECHNICAL FIELD

The present invention is related to cutting elements, and more particularly, to intermetallic bonded diamond (IBD) cutting elements having various shapes and configurations.

BACKGROUND OF THE INVENTION

Polycrystalline Diamond Compact (PDC) cutters have become the industry standard for oil and gas drilling, especially in soft, medium soft and medium formation types, IADC codes 1,4,5, and 6 type rock. Since the early days of PDC cutter and drill bit development commencing in the mid 1970' s cutter makers and bit designers have proposed complex cutter shapes that could preferentially shear adjacent portions of a target formation and/or guide movement of cuttings or sheared formation materials in a way that would enhance bit cleaning.

Examples of such shapes can be found in US Patent 4,660,659 and US Patent 4,538,690 to Short, Jr. and US Patent 4,593,777 and US Patent 4,558,753 to Barr. These patents discuss diamond layer configurations of a curved, concave geometry for PDC cutters.

US Patent 4,570,726 to Hall describes a curved PDC drag element with a complex plowing configuration. US Patent 4,883,132 to Tibbitts discloses conventional "flat faced" PDC cutters in conjunction with a body design that carries large void areas in the bit blades. The concept was to allow for reverse jetting of shale cuttings through the blade. As a commercial reality, none of the more radical or complex cutter designs have found success primarily due to the difficulties attendant in actually manufacturing such cutters in high pressure diamond presses. If a cutter design could be manufactured but left high residual stresses in the PDC layer or in the tungsten carbide (WC) substrate, then the cutter would lack fracture toughness in field applications.

For a brief period in the 1990' s it was thought that Carbon Vapor Deposition (CVD) Diamond would overcome the difficulties with complex geometry attendant to PDC. However, it was found that the application of a thick and truly wear resistant layer associated with CVD is extremely time intensive and costly.

A more recent development, Intermetallic Bonded Diamond (IBD), is discussed in US Patent Application Publication 2006/0280638 published on December 14, 2006 and International Publication Number WO 2006/107628 published by WIPO on October 12th, 2006.

Both of these patent applications are incorporated by reference for all purposes. There are examples in the prior art literature of specially configured PDC blades being deployed in the very center of Fixed Cutter bits to improve the drilling characteristics of this slow surface speed area of the bit face.

SUMMARY OF THE DISCLOSURE

In accordance with teachings of the present disclosure, a cutting element may include a substrate having a bonding interface region and an intermetallic bonded diamond (IBD) element bonded to the bonding interface region of the substrate. In some embodiments, the bonding interface region of the substrate may have a non-axi-symmetrical shape and/or may be symmetrical about only one plane or about zero planes. In some embodiments, the bonding interface region of the substrate may have a shape of a tube, a beveled tube, a tube with one or more internal support structures, a scoop, a plow, a concave shape, a honeycombed shape, or other irregular or complex shape.

One aspect of the present disclosure may include forming cutting elements and/or inserts for fixed cutter drill bit with configurations that were previously difficult and sometimes not even possible to manufacture. One of the benefits of the present disclosure may include forming cutting elements with such configurations and the ability to survive repeated impact loads associated with drilling deep, high pressure and/or high temperature wellbores.

Forming cutting elements or inserts with an axial bore extending through each cutting element or insert may allow enhanced penetration of an adjacent formation and enhanced removal of formation materials from the bottom of a wellbore. Forming an axial bore in a cutting element or insert in accordance with teachings of the present disclosure may allow improved cooling of the cutting element or insert.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete and thorough understanding of the present embodiments and advantages thereof may be acquired by referring to the following description taken in conjunction with the accompanying drawings, in which like reference numbers indicate like features.

FIGURES IA and IB illustrate example tubular tungsten carbide substrates for an IBD cutter.

FIGURES 2A-2C illustrate an example tubular tungsten carbide IBD cutting element coupled to a blade of a cutting tool, according to one embodiment.

FIGURES 3A and 3B illustrate an example beveled tubular tungsten carbide IBD cutting element coupled to a blade of a cutting tool, according to one embodiment.

FIGURES 4A and 4B illustrate an example plow shaped IBD cutting element coupled to the substrate, according to one embodiment. FIGURES 5A and 5B illustrate an example IBD cutting element for use on a Hedge Hog type impregnated bit layout, according to one embodiment.

DETAILED DESCRIPTION OF THE INVENTION

The terms "cutting element" and "cutting elements" may be used in this application to include various types of compacts, inserts, milled teeth and welded compacts satisfactory for use with roller cone drill bits.

The recent development of Intermetallic Bonded Diamond (IBD) allows drill bit cutters and drill bits to be designed outside of the previous constraints. The present disclosure embodies cutting elements that take advantage of the IBD technology to produce practical, enabled, and useful wear resistant cutters of non-symmetrical, irregular, or relatively complex geometry for drill bits and down hole tools such as coring equipment and reamers, for example.

In some embodiments, a cutting element may include a substrate having a bonding interface region, and an intermetallic bonded diamond (IBD) element bonded to the bonding interface region of the substrate. The bonding interface region may comprise the entire substrate or a portion of the substrate. The substrate may be formed from tungsten carbide, steel, or any other suitable material (s). The IBD element may be bonded to the bonding interface region of the substrate by hot isostatic pressing (HIP) , or in any other suitable manner .

As discussed above, an IBD cutter may be formed having a non-symmetrical, irregular, or relatively complex geometry. In some embodiments, the bonding interface region of the substrate has a non-axi- symmetrical shape. In some embodiments, the bonding interface region may be symmetrical about only one plane, or not symmetrical about any plane. The bonding interface region of the substrate may include a hole extending partially or completely through the substrate. In some embodiments, the bonding interface region of the substrate may have the shape of a tube (see, e.g., FIGURES 1 and 2), a beveled tube (see, e.g., FIGURE 3), a tube with one or more internal support structures, a scoop, a plow (see, e.g., FIGURE 4), a concave shape, a honeycombed shape, or any other suitable shape. In a particular embodiment, the bonding interface region of the substrate has a plow shape with an included angle of less than or equal to about 100 degrees.

IBD when coupled with tubular, scoop shaped, plow shaped, concave, honeycomb, or other irregular or relatively complex-shaped substrates (e.g., as discussed above) may allow the bit designer unprecedented freedom in cuttings management, cutter cooling, and/or abrasives evacuation leading to enhanced drill bit performance. Bits can be designed that replace traditional PDC cutters with IBD cutters of a more efficient geometry.

IBD cutters may also allow the bit designer to employ mixes or patterns of IBD cutters with traditional PDC cutters or with traditional tungsten carbide inserts to achieve positive effects for specific rock types. Some of these effects may include, e.g., kerfing, impact management and mitigation, cutting force management, secondary cutting, enhanced gage protection, and/or bi-modal deployments for transitional drilling. In addition, IBD cutters may be deployed for hard rock drilling, IADC rock codes 3,7, and 8 by configuring the IBD cutters to replace traditional impregnated segments, impregnated posts, or impregnated discs. IBD cutters may also be used in conjunction with these traditional impregnated diamond cutting elements to achieve synergistic effects, e.g., kerfing, secondary cutting, impact management, and/or transitional drilling benefits .

Some fixed cutter drill bits may be manufactured with a bit body (not expressly shown) having one end operable for attachment to a drill string. The drill string may apply weight to the drill bit, sometimes referred to as "weight on bit" or WOB. The drill string may also rotate the drill bit (revolutions per minute or RPM) relative to a bit rotational axis extending through the bit body. The drill string may also supply drilling fluid to a cavity formed within the bit body.

A plurality of blades may be disposed on and extend from the bit body. Exterior portions of the blades and associated cutters may form a bit face profile. For some applications the blades may cooperate with each other to form a bit face profile having an inverted, generally cone shaped configuration opposite from the one end of the bit body.

For such applications, one or more tungsten carbide substrates maybe formed with one or more layers of IBD disposed thereon. Each substrate may include a respective post sized to be received within a respective opening formed in the bit body proximate the inverted cone shaped portion of the bit face profile. For some embodiments, an opening may be formed in the bit body proximate the bit rotational axis. For such embodiments, one or more tungsten carbide (WC) blades or plates covered with IBD may be held in place by brazing the posts into respective holes formed proximate the bit rotational axis. Such blades or plates may make the layout and manufacturing of the drill bit center more efficient than current practice even with standard cylindrical PDC cutters.

IBD cutters may offer an attractive, cost effective replacement for dome PDC for use in roller cone bit primary cutting structures, gage row cutting structures, in shirttail protection, and/or in various other structures or applications. IBD materials may be directly brazed to steel. Thus, cylinders made entirely of IBD can be used as direct replacements in steel body or matrix PDC bit designs without the need for a WC substrate. Such a configuration may dramatically increase the total deployed diamond carat weight for a given bit configuration compared to using conventional PDC. It may also allow for fewer blades on a bit for a given carat weight to increase drill bit penetration rate for a given weight on bit. In addition, IBD may carry diamond up to 700 microns in size. The coarsest grain size diamond typically used in PDC cutters is about 60 microns. Larger size diamonds generally allow for more aggressive angular cutting edges. This attribute may aid in extending typical applications for IBD drill bits to harder rock even when the cutters are deployed in configurations similar to current PDC type drill bit products .

Another advantage of IBD cutters according to the present disclosure is the fact that IBD cutters may not suffer from the deleterious effects usually resulting from the frictional contact of diamond or PDC with ferrous materials. Technical reports made by Southern Illinois University indicate that an IBD sample was run against a cast iron target for 9 hours with minimum wear or damage to the IBD. Thus, the principles of the present disclosure may be used to improve the design and implementation of casing milling, casing window, and drill-out bits. It may also make possible the deployment of a combination mill out and drill ahead bit that does not suffer undue amounts of wear and short service life due to the typical damage incurred through ferrous contact during the window milling operation.

Preferred embodiments of the invention may be better understood by reference to FIGURES 1A-5E. FIGURES IA and IB illustrate example tubular tungsten carbide substrates for an IBD cutter.

FIGURES 2A-2C illustrate an example tungsten carbide tubular IBD cutting element coupled to a blade of a cutting tool, according to one embodiment. In particular, FIGURE 2A is a side cross-sectional view illustrating a tubular tungsten carbide (WC) substrate coupled to a steel blade. An IBD element is bonded (e.g., by hot isostatic pressing) to an interface region of the substrate. FIGURE 2B illustrates a partial three- dimensional view of the tubular cutting element and steel blade. FIGURE 2C illustrates an end view of an alternative embodiment in which a support structure is positioned within the tubular cutting element, e.g., to provide structural support to the cutting element. One or more such structural supports having any suitable configuration may be included to provide additional structural support to the cutting element.

FIGURES 3A and 3B illustrate an example beveled tubular tungsten carbide IBD cutting element coupled to a blade of a cutting tool, according to one embodiment. In particular, FIGURE 3A is a side cross-sectional view illustrating a beveled tubular tungsten carbide (WC) substrate coupled to a steel blade. An IBD element is bonded (e.g., by hot isostatic pressing) to an interface region of the substrate. FIGURE 3B illustrates a partial three-dimensional view of the beveled tubular cutting element and steel blade. In other embodiments, one or more structural supports may be included to provide additional structural support to the cutting element, e.g., as discussed above regarding FIGURE 2C.

FIGURES 4A and 4B illustrate an example plow shaped IBD cutting element coupled, according to one embodiment. In particular, FIGURE 4A is a cross-sectional view illustrating a plow shaped substrate having an IBD element bonded to an interface region of the substrate. FIGURE 4B illustrates a three-dimensional view of the plow shaped cutting element.

FIGURES 5A and 5B illustrate an example IBD cutting element for use on a Hedge Hog type impregnated bit layout, according to one embodiment. In particular, FIGURE 5A is a side view illustrating a substrate (e.g., tungsten carbide or steel post) having an IBD element bonded to an interface region of the substrate, and FIGURE 5B is an end view of the cutting element.

Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alternations can be made herein without departing from the spirit and scope of the invention as defined by the following claims .

Claims

WHAT IS CLAIMED IS:
1. A cutting element, comprising: a substrate having a bonding interface region; and an intermetallic bonded diamond (IBD) element bonded to the bonding interface region of the substrate.
2. A cutting element according to Claim 1, wherein the substrate is formed from tungsten carbide.
3. A cutting element according to Claim 1, wherein the substrate is formed from steel.
4. A cutting element according to Claim 1, wherein the IBD element is bonded to the bonding interface region of the substrate by hot isostatic pressing (HIP) .
5. A cutting element according to Claim 1, wherein the bonding interface region of the substrate has a non- axi-symmetrical shape.
6. A cutting element according to Claim 1, wherein the bonding interface region of the substrate has a shape that is symmetrical about only one plane.
7. A cutting element according to Claim 1, wherein the bonding interface region of the substrate has a shape that is not symmetrical about any plane.
8. A cutting element according to Claim 1, wherein the bonding interface region of the substrate includes a hole extending at least partially through the substrate.
9. A cutting element according to Claim 1, wherein the bonding interface region of the substrate includes a hole extending completely through the substrate.
10. A cutting element according to Claim 1, wherein the bonding interface region of the substrate has a shape of a tube, a beveled tube, a tube with one or more internal support structures, a scoop, a plow, a concave shape, or a honeycombed shape.
11. A cutting element according to Claim 1, wherein the bonding interface region of the substrate has a plow shape with an included angle of less than or equal to about 100 degrees.
12. A cutting element according to Claim 1, wherein the cutting element is configured for use in cutting ferrous materials.
13. A fixed cutter drill bit, comprising: a bit body including one or more bit blades; and one or more cutting elements bonded to at least one of the bit blades, at least one of the cutting elements including: a substrate having a bonding interface region; and an intermetallic bonded diamond (IBD) element bonded to the bonding interface region of the substrate.
14. A cutting element according to Claim 13, wherein the bonding interface region of the substrate has a non-axi-symmetrical shape.
15. A fixed cutter drill bit according to Claim 13, wherein the bonding interface region of the substrate includes a hole extending at least partially through the substrate .
16. A fixed cutter drill bit according to Claim 13, wherein the bonding interface region of the substrate has a shape of a tube, a beveled tube, a tube with one or more internal support structures, a scoop, a plow, a concave shape, or a honeycombed shape.
17. An apparatus for drilling an earthen formation, the apparatus comprising: a support structure; and one or more cutting elements coupled to the support structure, each cutting element including: a substrate having a bonding interface region; and an intermetallic bonded diamond (IBD) element bonded to the bonding interface region of the substrate.
18. An apparatus according to Claim 17, wherein the cutting elements are brazed into the support structure.
19. An apparatus according to Claim 17, wherein the bonding interface region of the substrate has a non-axi- symmetrical shape.
20. An apparatus according to Claim 17, wherein the bonding interface region of the substrate includes a hole extending at least partially through the substrate.
21. An apparatus according to Claim 17, wherein the bonding interface region of the substrate has a shape of a tube, a beveled tube, a tube with one or more internal support structures, a scoop, a plow, a concave shape, or a honeycombed shape.
PCT/US2008/050395 2007-01-08 2008-01-07 Intermetallic bonded diamond (ibd) cutting elements WO2008086280A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US88388407 true 2007-01-08 2007-01-08
US60/883,884 2007-01-08

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US12522352 US20100051351A1 (en) 2007-01-08 2008-01-07 Intermetallic bonded diamond (ibd) cutting elements
CA 2674828 CA2674828A1 (en) 2007-01-08 2008-01-07 Intermetallic bonded diamond (ibd) cutting elements
GB0912847A GB0912847D0 (en) 2007-01-08 2009-07-23 Intermetallic bonded diamond (IBD) cutting elements

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WO2008086280A1 true true WO2008086280A1 (en) 2008-07-17

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US (1) US20100051351A1 (en)
CN (1) CN101611212A (en)
CA (1) CA2674828A1 (en)
GB (1) GB0912847D0 (en)
WO (1) WO2008086280A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9194189B2 (en) 2011-09-19 2015-11-24 Baker Hughes Incorporated Methods of forming a cutting element for an earth-boring tool, a related cutting element, and an earth-boring tool including such a cutting element

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US4593776A (en) * 1984-03-28 1986-06-10 Smith International, Inc. Rock bits having metallurgically bonded cutter inserts
US4696354A (en) * 1986-06-30 1987-09-29 Hughes Tool Company - Usa Drilling bit with full release void areas
US6145608A (en) * 1993-11-22 2000-11-14 Baker Hughes Incorporated Superhard cutting structure having reduced surface roughness and bit for subterranean drilling so equipped
US6845828B2 (en) * 2000-08-04 2005-01-25 Halliburton Energy Svcs Inc. Shaped cutting-grade inserts with transitionless diamond-enhanced surface layer
US20060074616A1 (en) * 2004-03-02 2006-04-06 Halliburton Energy Services, Inc. Roller cone drill bits with optimized cutting zones, load zones, stress zones and wear zones for increased drilling life and methods
US20060280638A1 (en) * 2005-04-01 2006-12-14 Wittmer Dale E Intermetallic bonded diamond composite composition and methods of forming articles from same

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US20060032677A1 (en) * 2003-02-12 2006-02-16 Smith International, Inc. Novel bits and cutting structures
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US4380471A (en) * 1981-01-05 1983-04-19 General Electric Company Polycrystalline diamond and cemented carbide substrate and synthesizing process therefor
US4593776A (en) * 1984-03-28 1986-06-10 Smith International, Inc. Rock bits having metallurgically bonded cutter inserts
US4696354A (en) * 1986-06-30 1987-09-29 Hughes Tool Company - Usa Drilling bit with full release void areas
US6145608A (en) * 1993-11-22 2000-11-14 Baker Hughes Incorporated Superhard cutting structure having reduced surface roughness and bit for subterranean drilling so equipped
US6845828B2 (en) * 2000-08-04 2005-01-25 Halliburton Energy Svcs Inc. Shaped cutting-grade inserts with transitionless diamond-enhanced surface layer
US20060074616A1 (en) * 2004-03-02 2006-04-06 Halliburton Energy Services, Inc. Roller cone drill bits with optimized cutting zones, load zones, stress zones and wear zones for increased drilling life and methods
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9194189B2 (en) 2011-09-19 2015-11-24 Baker Hughes Incorporated Methods of forming a cutting element for an earth-boring tool, a related cutting element, and an earth-boring tool including such a cutting element
US9771497B2 (en) 2011-09-19 2017-09-26 Baker Hughes, A Ge Company, Llc Methods of forming earth-boring tools

Also Published As

Publication number Publication date Type
CN101611212A (en) 2009-12-23 application
US20100051351A1 (en) 2010-03-04 application
CA2674828A1 (en) 2008-07-17 application
GB0912847D0 (en) 2009-08-26 grant
GB2459396A (en) 2009-10-28 application

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