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Reinforced abrasive-impregnated cutting elements, drill bits including same and methods

Info

Publication number
WO2000015942A1
WO2000015942A1 PCT/US1999/021196 US9921196W WO2000015942A1 WO 2000015942 A1 WO2000015942 A1 WO 2000015942A1 US 9921196 W US9921196 W US 9921196W WO 2000015942 A1 WO2000015942 A1 WO 2000015942A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
bit
impregnated
segment
member
drill
Prior art date
Application number
PCT/US1999/021196
Other languages
French (fr)
Inventor
Gordon A. Tibbitts
Lorenzo G. Lovato
Original Assignee
Baker Hughes Incorporated
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

    • 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
    • E21B10/56Button type inserts
    • E21B10/567Button type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/573Button type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts characterised by support details
    • E21B10/5735Interface between the substrate and the cutting element
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12014All metal or with adjacent metals having metal particles
    • Y10T428/12028Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063Nonparticulate metal component
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12014All metal or with adjacent metals having metal particles
    • Y10T428/1216Continuous interengaged phases of plural metals, or oriented fiber containing
    • Y10T428/12167Nonmetal containing

Abstract

A cutting element for use on a rotary-type earth boring drill bit (80) for drilling subterranean formations including a segment (62) and a support member (66). The support member is preferably fabricated from a tough and ductile material, such as iron, an iron-based alloy, nickel, a nickel-based alloy, copper, a copper-based alloy, titanium, a titanium-based alloy, zirconium, a zirconium-based alloy, silver, or a silver-based alloy. A bit attachment portion (70) of the support member is securable to a bit body. A segment-receiving portion of the support member is disposable within a recess formed in the segment to secure the segment to the bit body and support the segment during use of the drill bit. Preferably, the segment is fabricated from a hard continuous phase material that is impregnated with a particulate abrasive material, such as natural diamond, synthetic diamond, or cubic boron nitride. The continuous phase material and abrasive material may be aggregated by sintering, hot isostatic pressing, laser melting, or ion beam melting.

Description

REINFORCED ABRASIVE-IMPREGNATED CUTTING ELEMENTS, DRILL BITS INCLUDING SAME AND METHODS

TECHNICAL FIELD The present invention relates to cutting elements for use on earth boring drill bits and bits so equipped. In particular, the present invention relates to a cutting element which includes a support which interconnects an abrasive-impregnated cutting structure to the drill bit and mechanically reinforces the impregnated segment. More specifically, the cutting element of the present invention includes a tough and ductile support structure which may be internal or external to the impregnated segment.

BACKGROUND ART Conventionally, earth boring drill bits with impregnated cutting structures, commonly termed "segments," have been employed to bore through very hard and abrasive formations, such as basalt, dolomite and hard sandstone. As depicted by FIG. 1, the impregnated segments 16 of such drill bits are typically secured to the boring end 14, which is typically termed the "face," of the bit body 12 of the drill bit 10 in a generally radial fashion. Impregnated segments may also be disposed concentrically over the face of the drill bit. As the drill bit gradually grinds through a very hard and abrasive formation, the outermost layer of the impregnated segments containing abrasive particles (such as small diamonds, diamond grit, or other super- abrasive particles such as cubic boron nitride) wear and may fracture. Many conventional impregnated segments are designed to release, or "shed", such diamonds or grit in a controlled manner during use of the drill bit. As a layer of diamonds or grit is shed from the face, underlying diamonds are exposed as abrasive cuttings and the diamonds that have been shed from the drill bit wear away the exposed continuous phase of the segment in which the interior diamonds are dispersed, thereby "resharpening" the bit until the entire diamond-impregnated portion of the bit has been consumed. Thus, drill bits with diamond-impregnated segments typically maintain a substantially constant boring rate as long as diamonds remain exposed on such segments.

Conventional impregnated segments typically carry the super-abrasive particles in a continuous phase of a hard material, such as tungsten carbide, a tungsten alloy, a metal carbide, a refractory metal alloy, a ceramic, copper, a copper-based alloy, nickel, a nickel-based alloy, cobalt, a cobalt-based alloy, iron, an iron-based alloy, silver, or a silver-based alloy. Such materials are, however, typically relatively brittle and may fracture when subjected to the stresses of drilling. Accordingly, when subjected to the high stresses of drilling, and particularly impact stresses, the continuous phase of such impregnated segments may break, resulting in the premature failure thereof and potentially the premature failure of the bit upon which such segments are carried. Thus, drilling times and costs are increased by premature failure of conventional impregnated segments, as it is necessary to remove the drill string from the bore hole, replace the entire drill bit, and reintroduce the drill string into the bore hole. United States Patent 4,234,048 (the "'048 patent"), which issued to David S.

Rowley on November 18, 1980, discloses an exemplary drill bit that bears diamond- impregnated segments on the crown thereof. Typically, the impregnated segments of such drill bits are C-shaped or hemispherically shaped, somewhat flat, and arranged somewhat radially around the crown of the drill bit. Each impregnated segment typically extends from the inner cone of the drill bit, over the nose and up the bit face to the gage. The impregnated segments may be attached directly to the drill bit during fabrication, or partially disposed within a slot or channel formed into the crown and secured to the drill bit by brazing. When attached to the crown of a drill bit, conventional impregnated segments have a relatively low profile (i.e., shallow recesses between adjacent segments) relative to the bit face and a footprint that covers the majority of the drill bit surface from the nose to the gage. The low profile is typically required due to the relatively brittle materials from which the continuous phases of conventional impregnated segments are formed. Similarly, the generally semicircular shape of conventional impregnated segments and their somewhat radial arrangement around the crown of a bit body are required to prevent the breakage and premature wear of such impregnated segments due to the hard but relatively brittle continuous phase materials thereof. The large "footprint" of conventional impregnated segment-bearing drill bits is typically necessary to provide a sufficient amount of cutting material on the face of the bit. To some extent, the conventionally required semicircular shape of impregnated segments has also prohibited the use of alternative impregnated segment shapes, drill bit designs, and arrangements of impregnated segments on drill bits, which could otherwise optimize drilling rates and reduce the rate of bit wear and failure. Because of the low profile or exposure and large surface area footprint of conventional impregnated segments, very little clearance exists between the face of the drill bit and the drilled formation during use of the drill bit upon which such segments are carried. Consequently, the build-up of formation fines, such as rock flour, on the impregnated segments may prevent contact of the impregnated segments with the interior surface of the borehole, and may reduce the depth of cut of the drill bit. Moreover, due to the large surface area footprint and the low profile of impregnated segments on conventional drill bits, the hydraulics of such drill bits cannot be employed to remove formation fines therefrom or to cool the segments. Therefore, the rate of drilling and the amount of weight on bit that may be employed on the drill bit may be decreased, while the rate of wear is undesirably high, and failure of the drill bit may occur.

Thus, there is a need for an impregnated segment which will better resist breakage during drilling of very hard and abrasive formations, and which may be optimally designed and arranged upon a drill bit. There is also a need for impregnated segments which may be arranged on a drill bit to facilitate the use of drill bit hydraulics to remove formation fines from the impregnated surfaces of the drill bit and which facilitate the use of alternative drill bit designs.

DISCLOSURE OF INVENTION

The cutting elements of the present invention address the foregoing needs. The cutting elements of the present invention include an impregnated cutting structure having an associated support member, which support member is securable to an earth boring rotary-type drill bit body, and provides mechanical support to the cutting structure.

The impregnated segment includes a continuous phase material impregnated with particles of an abrasive material. Preferably, the continuous phase material includes a hard, erosion- and wear-resistant material, such as metal carbide, a refractory metal alloy, a ceramic, copper, a copper-based alloy, nickel, a nickel-based alloy, cobalt, a cobalt-based alloy, iron, an iron-based alloy, silver, or a silver-based alloy. The abrasive material with which the continuous phase material is impregnated preferably comprises a hard, abrasive and abrasion-resistant material, and most preferably a super-abrasive material such as natural diamond, synthetic diamond, or cubic boron nitride. The impregnated segment may include more than one type of abrasive material, as well as one or more sizes of abrasive material particles. The impregnated segment is fabricated by mixing the continuous phase material with the abrasive material and employing known processes, such as hot isostatic pressing, sintering, laser melting, or ion beam melting, to fuse the mixture into a cutting structure of desired shape. The impregnated segment may be fabricated directly onto a segment- retaining portion, or segment-retaining surface, of the support member, or attached thereto by known techniques, such as brazing or mechanical affixation. The support member of the inventive cutting element, which is preferably fabricated from a tough and ductile material, iron, an iron-based alloy, nickel, a nickel- based alloy, copper, a copper-based alloy, titanium, at titanium-based alloy, zirconium, a zirconium-based alloy, silver, or a silver-based alloy, and other tough and ductile materials that will withstand elevated temperatures, such as are experienced during sintering, brazing and bit furnacing, includes a segment-retaining portion and a drill bit attachment portion. The segment-retaining portion of the support member may be secured to the impregnated segment. The attachment portion of the support member is preferably insertable into a socket of a bit body and may be secured therein by brazing to the bit body, mechanical affixation, or other known processes. Alternatively, the support member may be secured to the bit body by integral infiltration therewith during fabrication thereof.

When attached to a drill bit, a portion of the impregnated segment may be recessed within the socket or a countersink thereabout and, therefore, protected by the bit face adjacent the peripheral edge of the socket that retains the cutting element. Such recessing of the impregnated segment may provide additional support to the impregnated segment and prevent dislodging of the impregnated segment from the support member by shielding the interface of the impregnated segment and the support member from drilling fluid and abrasive, erosive debris that may otherwise come into contact therewith during drilling.

Since the segment-retaining portion of the tough and ductile support member is preferably secured to the impregnated segment, the support member supports the impregnated segment during use of the drill bit. Accordingly, the impregnated segment may extend from the face of the drill bit body a greater distance than many conventional impregnated segments (i.e., the inventive impregnated segment may have an increased exposure relative to that of conventional impregnated segments). Thus, the segment-support member configuration of the cutting element of the present invention facilitates the use of alternatively shaped impregnated segments on a drill bit, alternative impregnated segment orientations on the drill bit, and differently shaped drill bits for boring through very hard and abrasive formations.

Other advantages of the present invention will become apparent to those of ordinary skill in the art through a consideration of the ensuing description, the drawings and the appended claims.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an inverted side plan view of a conventional drill bit with impregnated segments disposed in a generally radial fashion over the crown of the drill bit; FIG. 2 is a perspective view of a first embodiment of a cutting element according to the present invention, including a C-shaped impregnated segment and a support member disposed in a concave portion of the impregnated segment;

FIGs. 2a-2c are perspective views of variations of the cutting element of FIG. 2; FIG. 3 is a partial inverted side plan view of a drill bit which includes the cutting elements of FIG. 2;

FIG. 4 is a frontal perspective view of another embodiment of the cutting element of the present invention, wherein the support member is an elongated member having an impregnated segment disposed on a portion thereof; FIG. 5 is a cross-section taken along line 5—5 of FIG. 4; FIG. 6 is a perspective view of variation of the cutting element of

FIGs. 4 and 5, wherein the support member and impregnated segment each include a non-circular cross-section; FIG. 7 is a partial vertical cross-sectional view of a bit body, which illustrates the member of FIGs. 4 and 5 disposed in a socket of the bit body with the entire impregnated segment being located externally relative to the bit face;

FIG. 8 is a partial vertical cross-sectional view of a bit body, which illustrates the support member of FIGs. 4 and 5 disposed in a socket of the bit body and a portion of the impregnated segment disposed in a countersink formed about the socket;

FIG. 9 is a frontal perspective view of another embodiment of the cutting element of the present invention, wherein the support member is an elongated member having an impregnated segment disposed on a portion thereof such that the periphery of the impregnated segment is substantially flush with the exposed periphery of the support member;

FIG. 10 is a cross-section taken along line 10—10 of FIG. 9;

FIG. 11 is a partial vertical cross-sectional view of a bit body, which illustrates the support member of FIGs. 9 and 10 disposed in a socket of the bit body with the entire impregnated segment being located externally relative to the bit face;

FIG. 12 is a partial vertical cross-sectional view of a bit body, which illustrates the support member of FIGs. 9 and 10 disposed in a socket of the bit body with a portion of the impregnated segment being located within the socket;

FIGs. 13-15 are cross-sectional views of alternative embodiments of the cutting element, wherein the cutting surface protrudes from the drill bit;

FIG. 16 is a cross-sectional view of another embodiment of the cutting element, wherein the impregnated segment faces the direction of rotation of the drill bit;

FIG. 16a is a top plan view of a variation of the embodiment of FIG. 16;

FIG. 17 is a cross-sectional view of another embodiment of the cutting element, wherein the support member includes a recess for receiving the impregnated segment or a portion thereof;

FIG. 18 is an inverted perspective view of a drill bit which carries the cutting elements of FIGs. 4 and 5 or of FIGs. 9 and 10;

FIGs. 19-21 are inverted perspective views which each illustrate a variation of the drill bit of FIG. 18;

FIGs. 22-24 illustrate exemplary increased surface area interfaces between an impregnated segment and an associated support member; FIG. 25 is a frontal perspective view of an arcuate shaped segment and support member according to the present invention; and

FIG. 26 is an bottom view of a drill bit including the arcuate shaped segments and support members of FIG. 25 disposed thereabout in a circumferential configuration.

BEST MODE(S) FOR CARRYING OUT THE INVENTION With reference to FIG. 2, a first embodiment of a cutting element 30 according to the present invention is depicted. Cutting element 30 includes a substantially C-shaped impregnated segment 32 which defines a recess 34, which is also referred to as a member-securing portion or surface, in the concave portion thereof. Recess 34 is configured to receive a complementary shaped segment-receiving portion 38 of a support member 36, which is also referred to as a member. A portion of support member 36 lying within the curve of the "C" of segment 32 is referred to as a bit attachment portion 40.

Impregnated segment 32 preferably includes a continuous phase, which may be a metallic phase, throughout which an abrasive, abrasion-resistant material is dispersed, as known in the art. Preferably, continuous phase material is a hard, erosion-resistant and wear-resistant material. Continuous phase materials that are useful in impregnated segment 32 include, without limitation, metal carbides (e.g., tungsten carbide, titanium carbide, silicon carbide, etc.), refractory metal alloys, ceramics, copper, copper-based alloys, nickel, nickel-based alloys, cobalt, cobalt-based alloys, iron, iron-based alloys, silver, or silver-based alloys.

Abrasive materials that are useful in impregnated segment 32 and provide a cutting structure within the segment are preferably hard, abrasive and abrasion-resistant materials. Exemplary abrasive materials with which the continuous phase material of impregnated segment 32 may be impregnated include, but are not limited to, super- abrasives, such as natural diamonds, synthetic diamonds, cubic boron nitride, as well as other hard, abrasive and abrasion-resistant materials. The abrasive material may be coated with a single or multiple layers of metal coatings, as known in the art and disclosed in United States Patents 4,943,488 and 5,049,164, the disclosures of each of which are hereby incorporated by reference in their entirety. Such metal coatings are known to increase the strength with which the abrasive material bonds to the continuous phase material. The abrasive material may be of a substantially uniform particle size, which may be measured in carats or mesh size, or may include particles of various sizes. Similarly, the continuous phase material may be impregnated with a combination of various types of abrasive materials. Impregnated segment 32 may also include secondary abrasives, such as ceramics and aluminum oxides.

The continuous phase material and abrasive material of impregnated segments 32 are preferably aggregated into a desired shape by known processes that bond the continuous phase material and the particles of abrasive material together, such as sintering, hot isostatic pressing, laser melting, or ion beam melting. Impregnated segment 32 may be fabricated with a recess or member-securing portion that is shaped to receive the segment-receiving portion 38 of support member 36 and subsequently secured thereto by known techniques, such as by the use of adhesives, brazing, or mechanical affixation. Alternatively, impregnated segment 32 may be formed directly onto support member 36 wherein impregnated segment 32 is simultaneously secured to support member 36.

Support member 36 is preferably fabricated from a tough and ductile material that will withstand the forces that are encountered by the drill bit while employed in the drilling of subterranean formations. Exemplary materials that may be used to fabricate support member 36 include, without limitation, iron, an iron-based alloy, nickel, a nickel-based alloy, copper, a copper-based alloy, titanium, at titanium-based alloy, zirconium, a zirconium-based alloy, silver, or a silver-based alloy, and other tough and ductile materials that will withstand elevated temperatures, such as are experienced during sintering, brazing and bit furnacing. Support member 36 may be manufactured by techniques known in the art, such as by sintering, casting, forging or machining.

FIGs. 2a-2c illustrate exemplary variations of the cutting element 30 of FIG. 2 that are also within the scope of the present invention. FIG. 2a shows a cutting element 30' that includes an impregnated segment 32' having an L-shaped cross section. Preferably, when disposed on a drill bit, the portion of impregnated segment 32' that extends over the side of support member 36' faces in the same direction that the bit rotates. FIG. 2b shows a cutting element 30" including an impregnated segment 32" similar to that shown in FIG. 2a, but having a substantially triangular cross section. Again, the exposed side of impregnated segment 32" faces in the direction of bit rotation. FIG. 2c illustrates another variation, in which the cutting element 30'" includes an impregnated segment 32'" that is secured to a single major surface of the support member 36'." Referring to FIG. 3, a drill bit 48 is shown which includes several cutting elements 30 disposed in a generally radial fashion about the crown 52 of the bit 48. Preferably, the bit attachment portion 40 of the support member 36 (see FIG. 2) of each cutting element 30 is disposed within a slot 56 that is formed into crown 52 of drill bit 48 and shaped complementary to bit attachment portion 40. Slots 56 may also be shaped to receive lower portions of impregnated segments 32, such that lower portions of impregnated segments 32 are recessed beneath and external into the bit face 54 so that the interfaces between segments 32 and support members 36 are protected from the drilling fluid and debris that are present in the bore hole during drilling.

The bit attachment portion 40 (see FIG. 2) of each cutting element 30 is secured to crown 52 by known techniques, such as by the use of adhesives, brazing, or mechanical affixation. Alternatively, and particularly when support member 36 is a particulate-based structure (e.g., a structure comprised of sintered steel), bit attachment portion 40 of each cutting element may be disposed within a mass of particulate-based matrix material used to form bit body 50, and the matrix material and support members integrally infiltrated, as known in the art. During infiltration, molten binder, typically a copper-based alloy, imbibes between the particles of bit body 50 matrix and support member 36 by capillary action, gravity, or under pressure. As the binder solidifies, it binds particles of the matrix to one another to form bit body 50 and fixes cutting elements 30 to bit body 50. As another alternative, a particulate-based support member 36 and its associated segment 32 may be infiltrated independently of the bit body, prior to assembly with or securing of same to crown 52.

With continued reference to FIG. 3, due to the insertion of segment-receiving portion 38 of support member 36 into recess 34 (see FIG. 2) of impregnated segment 32, support member 36 braces and somewhat resiliently supports impregnated segment 32 against both normal and torsional rotational stresses encountered during drilling. Thus, support member 36 may reduce the likelihood that impregnated segment 32 will fracture or otherwise be damaged during drilling. Accordingly, support member 36 facilitates a higher profile or exposure of cutting elements 30 relative to bit face 54 than conventional drill bits that carry impregnated segments (see FIG. 1). Thus, a greater volume and depth of space may exist between adjacent cutting elements 30 on drill bit 48 than between conventional impregnated segments that are carried upon a similarly configured drill bit. This increased volume and depth of space between adjacent cutting elements 30 improves the hydraulic performance of drill bit 48 relative to conventional drill bits which carry impregnated segments. Consequently, cutting elements 30 facilitate an increased rate of debris removal from the drilling surface. Similarly, more drilling fluid may be supplied to the impregnated segments, which facilitates a reduction in the amount of potentially damaging friction generated at crown 52, as well as increases the rate at which the impregnated segments are cooled, reducing the likelihood of damaging the segments and potentially decreasing their rate of wear due to heat-induced degradation of the segment continuous phase material. FIGs. 4 and 5 illustrate another embodiment of the cutting element 60 of the present invention, which includes a post-like support member 66, which is also referred to as a member, with an impregnated segment 62 disposed on a portion thereof. Preferably, impregnated segment 62 is fabricated from a continuous phase material that is impregnated with an abrasive material, such as the continuous phase materials and abrasive materials described above in reference to the impregnated segment 32 of cutting element 30, shown in FIG. 2. The continuous phase material and abrasive material of impregnated segment 62 may also be aggregated by known processes, such as sintering, hot isostatic pressing, laser melting, or ion beam melting. Impregnated segment 62 has a circular cross section, taken transverse to a longitudinal axis 72 of cutting element 60, and includes a receptacle 64 formed in a bottom surface thereof. Support member 66 may be an elongated structure which includes a segment-receiving portion 68 at one end thereof and a bit attachment portion 70 at the opposite end thereof. Segment-receiving portion 68 is preferably shaped complementary to receptacle 64 of impregnated segment 62 so that it may receive and secure the impregnated segment or impregnated segment 62 may be formed over support member 66. Support member 66 may be fabricated from the same material and processes that may be employed to fabricate support member 36, which is shown in FIG. 2. Similarly, known techniques, such as those described above in reference to FIG. 2, may be employed to secure impregnated segment 62 to support member 66.

FIG. 6 illustrates a variation of the present embodiment of the cutting element 60', which includes a rectangular-shaped impregnated segment 62' attached to a portion of a support member 66' of rectangular cross section taken transverse to a longitudinal axis 72' of the cutting element. Similarly, the impregnated segments and support members of other variations of the present embodiment of the cutting element may have other, non-cylindrical shapes.

As shown in FIG. 7, bit attachment portion 70 of support member 66 may be disposed within a socket 82 formed in a face 84 of a bit body 80 by similar techniques to those described above in reference to FIG. 3. Preferably, socket 82 is shaped complementary to bit attachment portion 70 in order to receive cutting element 60 and securely attach same to bit body 80. In FIG. 7, cutting elements 60 are arranged on bit face 84 such that impregnated segments 62 are located entirely external relative to the bit face, and the bottom surface of the impregnated segments may abut the bit face.

Alternatively, as shown in FIG. 8, each socket 82 may include a countersink 83 around the opening thereof, within which a lower portion of impregnated segment 62 may be disposed as a support member 66 is positioned within socket 82 and cutting element 60 is attached to bit body 80. When a portion of impregnated segments 62 are located below bit face 84, the interface between impregnated segment 64 and support member 66 is shielded from the drilling surface, debris and drilling fluid that may otherwise penetrate the interface and dislocate impregnated segment 62 from support member 66 by erosion or abrasion.

Turning now to FIGs. 9 and 10, another embodiment of the inventive cutting element 100 is shown, which includes an impregnated segment 102 disposed on a portion of a support member 106. Impregnated segment 102 and support member 106 each have a circular cross section, taken transverse to a longitudinal axis 72 of cutting element 100. Impregnated segment 102 includes a recess 104, which is also referred to as a member-securing portion, formed in the bottom thereof, which is configured to interconnect with a complementary shaped segment-receiving portion 108 of support member 106. Support member 106 also includes a bit attachment portion 110 opposite segment-receiving portion. Preferably, segment-receiving portion 108 has a smaller circumference than bit attachment portion 110 and, when viewed from the top thereof, is concentrically positioned upon bit attachment portion 110.

Support member 106 and impregnated segment 102 may be interconnected by known techniques such as by the use of adhesives, brazing, mechanical affixation, or by aggregating the continuous phase material and abrasive material impregnated segment 102 directly onto segment-receiving portion 108 of support member 106.

When impregnated segment 102 and support member 106 are interconnected, a peripheral interface 105 is defined between the impregnated segment and support member. Preferably, impregnated segment 102 and bit attachment portion 110 of support member 106 may each have substantially constant cross-sectional (taken transverse to longitudinal axis 112) peripheral circumferences along the heights thereof. The cross-sectional peripheral circumferences of impregnated segment 102 and bit attachment portion 110 are substantially the same. Thus, the edges of impregnated segment 102 and support member 106 at peripheral interface 105 abut each other in a substantially flush arrangement, imparting cutting element 100 with a substantially cylindrical appearance.

Preferably, impregnated segment 102 is fabricated from a continuous phase material that is impregnated with an abrasive material, such as the continuous phase materials and abrasive materials described above in reference to the impregnated segment 32 of cutting element 30, shown in FIG. 2. Similarly, the continuous phase material and abrasive material of impregnated segment 102 may be aggregated by known processes, such as sintering, hot isostatic pressing, laser melting, or ion beam melting. Similarly, support member 106 is fabricated from the same materials and by the same techniques that are described above in reference to support member 36, which is also shown in FIG. 2.

Referring now to FIG. 11, bit attachment portion 110 of each support member 106 may be disposed within a socket 82 formed in a face 84 of a bit body 80. Preferably, sockets 82 are shaped complementary to a corresponding bit attachment portion 110 so as securely receive cutting element 100. Cutting element 100 may be secured to bit body 80 by techniques such as those described above in reference to FIG. 3. The depth of sockets 82 may be such that, when cutting elements 100 are attached to bit body 80, impregnated segments 102 are located entirely exterior of bit face 84. Alternatively, as shown in FIG. 12, deeper sockets 82' may receive a lower portion of impregnated segments 102, positioning the lower portion below bit face 84, and thereby shielding peripheral interface 105 from the drilling surface, debris and drilling fluid that may otherwise penetrate the interface and dislocate impregnated segment 102 from support member 106.

Other variations of cutting element 100 may have non-circular cross-sectional shapes, such as oval, elliptical, triangular, rectangular, other polygonal shapes, or other shapes. Exemplary variations of cutting element 100, which include impregnated segments that protrude from the drill bit, are illustrated in FIGs. 13-15, wherein segments 107, 107', 107" are secured to drill bits 108, 108', 108" by support members 109, 109', 109", respectively.

With reference to FIG.16, another embodiment of a cutting element 140 of the present invention is shown. Cutting element 140 includes a support member 142 that is securable to a socket 147 defined in the face of a drill bit 146. Thus, support member 142 extends from drill bit 146. Support member 142 includes a leading face 144 which faces the direction of rotation of drill bit 146. Cutting element 140 also includes an impregnated segment 148 secured thereto and disposed on leading face 144 so as to facilitate contact of segment 148 with an interior surface of the bore hole during rotation of drill bit 146. Support member 142 may be supported from behind, relative to forces exerted thereagainst during drilling, by a buttress 145 of bit body material.

FIG. 16a illustrates a variation of the cutting element 140', wherein the support member 142' includes integral strengthening webs or struts, which configuration facilitates the fabrication of support member with less material than that of support member 142 of the cutting element 140 of FIG. 16 and also provides additional surface area to bond support member 142 to the bit body.

FIG. 17 illustrates yet another embodiment of a cutting element 150, which includes a support member 152 that is securable to a drill bit 156, such as in a socket 157 thereof, and includes a recess 153, which is also referred to as a member- securing portion. Recess 153 is configured to receive an impregnated segment 158, or an extension thereof, and secure the impregnated segment 158 thereto. Support member 152 may alternatively be secured to a matrix-type bit body during infiltration thereof.

FIG. 25 depicts an arcuate shaped cutting element 180 according to the present invention. Cutting element 180 includes a support member 182 that is securable to a drill bit, such as by a socket thereof, and includes an impregnated segment 184 disposed thereon.

The support member of the present invention facilitates an increased exposure or profile of the impregnated segments relative to that of conventional impregnated segments. This increased exposure of the impregnated segments prevents the buildup of formation fines on the cutting surface of the impregnated segments, promotes self- sharpening of the impregnated segments, and reduces the surface area of the footprint of the drill bit, which facilitates the use of the drill bit hydraulics to clear formation fines and debris from the surfaces of the borehole and the bit face. Such use of the drill bit hydraulics to remove the formation fines also reduces "pack off," which occurs as fines gather on the impregnated segments, and which may reduce the depth of cut of the drill bit. The increased exposure of the impregnated segments also accommodates the cutting of hard "stringers," such as shale.

Referring to FIGs. 22-24, to enhance the strength with which an impregnated segment is bound to its corresponding securing member, the surface area of the interface 164, 164', 164 " between an impregnated segment 160, 160', 160" and its corresponding support member 162, 162', 162", respectively, is preferably increased relative to that if a flat interface is employed. Accordingly, the segment-retaining portion of the support member 162, 162', 162" and the member-securing portion of the impregnated segment 160, 160', 160", respectively, may each comprise rough, preferably complementary, surfaces. Such high surface area interfaces prevent shearing or delamination of an impregnated segment off of a support member, which may be caused by bending stresses on the cutting element or to normal forces on the cutting element parallel to the member/segment interface. Accordingly, the mutually engaging surfaces of the impregnated segment-support member interface 164, 164', and 164" may include complementary thread cut (see FIG. 22), waffle (see FIG. 23), dove-tailed (see FIG. 24), dotted, or cross-hatched surfaces; apertures or blind holes and complementary protrusions; heavily sandblasted or otherwise roughened surfaces; or other configurations that increase the mutually-engaging surface areas of the two components. High surface area impregnated segment-support member interfaces are particularly useful in embodiments of the present invention that include relatively large, thin impregnated segments. With continued reference to FIG. 23, a support member 162' according to the present invention may comprise a blade 163' of the drill bit to which impregnated segment 160' is secured.

FIG. 18 depicts a drill bit 120 which includes a bit body 122, a blank that is partially disposed within the bit body, and a threaded shank 128 extending from the blank, which attaches the drill bit to a drill string, as known in the art. Bit body 122 carries a plurality of cutting elements 128 on the bit face 123 thereof. Cutting elements 128, which are preferably configured similarly to cutting elements 60, 100 described above in reference to FIGs. 5 and 6, and FIGs. 9 and 10, respectively, are preferably disposed in sockets 130 formed in bit face 123. Sockets 130 are preferably shaped complementary to a bit attachment portion 68, 108 (see FIGs. 5 and 6, 9 and 10, respectively) of cutting elements 128.

Cutting elements 128 may be arranged in generally radial rows that extend over the crown of bit body 122. Alternatively, as shown in FIG. 19, cutting elements 128' may be disposed upon bit face 123' in rows 129' that extend somewhat spirally over the crown of bit body 122'. As another alternative, FIG. 20 illustrates a drill bit 120" that includes cutting elements 128" disposed over bit face 123" in a non-grouped arrangement. As yet another alternative, FIG. 21 illustrates a drill bit 120'" that includes cutting elements 128'" disposed over bit face 123'" in a concentric arrangement. FIG. 26 illustrates a drill bit 186 that includes arcuate cutting elements 180 (see FIG. 25) in a somewhat circumferential arrangement thereon.

Preferably, adjacent cutting elements 128 are arranged on the bit face, such that during drilling the cutting elements cut the formation surface at the end of the borehole evenly, and at a substantially constant rate.

Referring again to FIG. 18, the support member 66, 106 (see FIGs. 5 and 6, 9 and 10, respectively) of each cutting element 128 is secured within its corresponding socket 130 by known techniques, such as by the use of adhesives, brazing, or mechanical affixation. Alternatively, when support members 66, 106 are porous (e.g., comprised of sintered steel), they may be secured to bit body 122 during infiltration of a matrix material of bit body 122 as described above in reference to FIG. 3.

Due to the use of support members 66, 100 in conjunction with impregnated segments 62, 102, for the same reasons that were discussed above in reference to FIG. 3, cutting elements 128 better withstand the stresses of drilling and, therefore, may be positioned upon drill bit 120 in a manner which improves the hydraulic performance thereof relative to that of conventional impregnated segment-bearing drill bits. Accordingly, an increased amount of drilling fluid may be supplied to bit face 123, which facilitates an increased rate of debris removal from the drilling surface of the bore hole, a reduction in the amount of potentially damaging friction that occurs during cutting, and an increase in the rate at which cutting elements 128 are cooled.

Although the foregoing description contains many specifics, these should not be construed as limiting the scope of the present invention, but merely as providing illustrations of some of the presently preferred embodiments. Similarly, other embodiments of the invention may be devised which do not depart from the spirit or scope of the present invention. The scope of this invention is, therefore, indicated and limited only by the appended claims and their legal equivalents, rather than by the foregoing description. All additions, deletions and modifications to the invention as disclosed herein which fall within the meaning and scope of the claims are to be embraced thereby.

Claims

CLAIMS What is claimed is:
1. A cutting element for use on an earth boring drill bit for drilling subterranean formations, comprising: a member including a segment-retaining portion and a drill bit attachment portion attachable to a drill bit; and a segment comprising a continuous phase impregnated with an abrasive material, and secured to said segment-retaining portion.
2. The cutting element of claim 1, wherein said member comprises a tough and ductile material.
3. The cutting element of claim 2, wherein said tough and ductile material comprises iron, an iron-based alloy, nickel, a nickel-based alloy, copper, a copper- based alloy, titanium, at titanium-based alloy, zirconium, a zirconium-based alloy, silver, or a silver-based alloy.
4. The cutting element of claim 1, wherein said continuous phase comprises a metal carbide, a refractory metal alloy, a ceramic, copper, a copper-based alloy, nickel, a nickel-based alloy, cobalt, a cobalt-based alloy, iron, an iron-based alloy, silver, or a silver-based alloy.
5. The cutting element of claim 1, wherein said abrasive material comprises at least one of natural diamond, synthetic diamond, or cubic boron nitride.
6. The cutting element of claim 1, wherein said segment further comprises a secondary abrasive.
7. The cutting element of claim 1, wherein said segment comprises a member- securing portion including a complementary shape to said segment-receiving portion.
8. The cutting element of claim 1, wherein said segment is C-shaped.
9. The cutting element of claim 1, wherein said segment is cylindrical.
10. The cutting element of claim 1, wherein said member is elongated.
11. The cutting element of claim 1 , wherein said segment faces in a direction of drilling the earth boring drill bit.
12. The cutting element of claim 1, wherein said member includes a recess configured to receive at least a portion of said segment.
13. A rotary-type earth boring drill bit for drilling subterranean formations, comprising: a bit body; and at least one cutting element comprising: a member including a segment-retaining portion and a drill bit attachment portion at least partially disposed within said bit body; and a segment comprising a continuous phase impregnated with an abrasive material, said segment including a member-securing portion to which said segment-retaining portion is secured.
14. The drill bit of claim 13, wherein said bit body comprises at least one socket.
15. The drill bit of claim 14, wherein said at least one socket comprises a complementary shape to said drill bit attachment portion.
16. The drill bit of claim 13, wherein said member comprises iron, an iron- based alloy, nickel, a nickel-based alloy, copper, a copper-based alloy, titanium, at titanium-based alloy, zirconium, a zirconium-based alloy, silver, or a silver-based alloy.
17. The drill bit of claim 16, wherein said bit body includes a particulate-based matrix infiltrated with a binder.
18. The drill bit of claim 17, wherein at least a portion of said binder secures said member to said bit body.
19. The drill bit of claim 13, wherein said member-securing portion comprises a complementary shape to said segment-retaining portion.
20. The drill bit of claim 14, wherein said at least one socket comprises a countersink.
21. The drill bit of claim 13, wherein said segment is partially disposed below a face of said bit body.
22. The drill bit of claim 13, comprising a plurality of said cutting elements.
23. The drill bit of claim 22, comprising at least one row comprising cutting elements of said plurality.
24. The drill bit of claim 23, wherein said at least one row extends radially over said bit body.
25. The drill bit of claim 23, wherein said at least one row extends spirally over said bit body.
26. The drill bit of claim 22, wherein said plurality of cutting elements are arranged concentrically over said bit body.
27. The drill bit of claim 13, wherein said abrasive material comprises at least one of natural diamond, synthetic diamond, or boron nitride.
28. A method of fabricating a cutting element for use on an earth boring drill bit, the method comprising: forming a member including a segment-receiving portion and a bit attachment portion; forming a segment including a member-securing portion configured complementary to said segment-receiving portion on said member; and disposing said segment-receiving portion in said receptacle.
29. The method of claim 28, wherein said forming a member comprises defining said member from a tough and ductile material.
30. The method of claim 29, wherein said tough and ductile material comprises sintered steel, steel, iron, or an iron alloy.
31. The method of claim 28, wherein said forming a segment comprises aggregating a plurality of continuous phase material particles and a plurality of abrasive material particles together.
32. The method of claim 31, wherein said aggregating comprises sintering.
33. The method of claim 32, wherein said forming said segment comprises forming said segment onto said member.
34. The method of claim 31, wherein said aggregating comprises hot isostatic pressing.
35. The method of claim 34, wherein said forming said segment comprises forming said segment onto said member.
36. The method of claim 31, wherein said aggregating comprises laser melting.
37. The method of claim 31, wherein said aggregating comprises ion beam melting.
38. The method of claim 31, wherein said plurality of continuous phase material particles comprise a metal carbide, a refractory metal alloy, a ceramic, copper, a copper-based alloy, nickel, a nickel-based alloy, cobalt, a cobalt-based alloy, iron, an iron-based alloy, silver, or a silver-based alloy.
39. The method of claim 31 , wherein said plurality of abrasive material particles comprise at least one of natural diamonds, synthetic diamonds, or boron nitride.
40. The method of claim 28, wherein said disposing and said forming said member are effected simultaneously and comprise forming said segment directly onto said segment-receiving portion.
41. A method of securing a cutting element to an earth boring drill bit, comprising: providing a mold; disposing a member of the cutting element within said mold; disposing a particulate bit body matrix material into said mold and in contact with said member; infiltrating said particulate bit body matrix material and said member with a binder material to define a bit body; and securing an impregnated segment to said member.
42. The method of claim 41, wherein said disposing said member further comprises orienting an impregnated segment of the cutting element.
43. The method of claim 41, wherein said infiltrating secures said member to said bit body.
44. A method of securing an impregnated segment to a rotary-type earth-boring drill bit, comprising: forming a support member comprising a blade of the rotary-type earth-boring drill bit; securing the impregnated segment to said support member; and securing a bit attachment portion of said support member to the drill bit.
45. The method of claim 44, wherein said forming comprises fabricating said support member from a quantity of particulate-based material.
46. The method of claim 45, wherein securing the bit attachment portion of said support member comprises infiltrating said support member with a molten binder material during fabrication of the drill bit.
47. The method of claim 45, wherein said forming comprises sintering said quantity of particulate-based material .
48. The method of claim 44, wherein said securing said support member comprises brazing said support member to the drill bit.
49. The method of claim 44, wherein said securing said support member comprises adhering said support member to the drill bit.
50. The method of claim 44, wherein said securing said support member comprises mechanically fixing said support member to the drill bit.
51. A cutting element for use on an earth boring drill bit for drilling subterranean formations, comprising: a support member comprising a blade of the earth boring drill bit and including an uneven segment-retaining surface; a segment comprising a continuous phase impregnated with an abrasive material and an uneven member-securing surface complementary to said segment-retaining surface; and and interface defined by mutual engagement of said segment-retaining surface and said member-securing surface.
52. The cutting element of claim 51, wherein said segment-retaining surface comprises a rough configuration.
53. The cutting element of claim 51, wherein said segment-retaining surface comprises a patterned configuration.
54. The cutting element of claim 53, wherein said patterned configuration comprises a waffle configuration, a threaded configuration, a dovetail configuration, a dotted configuration, cross-hatch configuration.
55. The cutting element of claim 53, wherein at least one of said segment- retaining surface and said member-securing surface comprises at least one protrusion and at least the other of said segment-retaining surface and said member-securing surface comprises at least one aperture that corresponds to said at least one protrusion.
PCT/US1999/021196 1998-09-16 1999-09-15 Reinforced abrasive-impregnated cutting elements, drill bits including same and methods WO2000015942A1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6742611B1 (en) 1998-09-16 2004-06-01 Baker Hughes Incorporated Laminated and composite impregnated cutting structures for drill bits
BE1014945A3 (en) * 2000-05-30 2004-07-06 Baker Hughes Inc Structure of cutting drilling subterranean.
US7497280B2 (en) 2005-01-27 2009-03-03 Baker Hughes Incorporated Abrasive-impregnated cutting structure having anisotropic wear resistance and drag bit including same
US7814895B2 (en) 2003-08-14 2010-10-19 Diamond Innovations, Inc. System and method for cutting granite or similar materials
WO2016187202A1 (en) * 2015-05-18 2016-11-24 Halliburton Energy Services, Inc. Methods of removing shoulder powder from fixed cutter bits

Families Citing this family (155)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7228901B2 (en) * 1994-10-14 2007-06-12 Weatherford/Lamb, Inc. Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7117863B1 (en) * 1999-01-25 2006-10-10 Black & Decker Inc. Saw blade for cutting fiber cement
US7938201B2 (en) 2002-12-13 2011-05-10 Weatherford/Lamb, Inc. Deep water drilling with casing
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
JP3641794B2 (en) * 1999-07-14 2005-04-27 きみ子 末田 Diamonds blade material
US6856228B2 (en) * 1999-11-23 2005-02-15 Intel Corporation Integrated inductor
US6843333B2 (en) 1999-11-29 2005-01-18 Baker Hughes Incorporated Impregnated rotary drag bit
EP1242711B1 (en) * 1999-12-22 2006-08-16 Weatherford/Lamb, Inc. Drilling bit for drilling while running casing
US6536520B1 (en) 2000-04-17 2003-03-25 Weatherford/Lamb, Inc. Top drive casing system
US9199315B2 (en) 2000-06-02 2015-12-01 Kennametal Inc. Twist drill and method for producing a twist drill which method includes forming a flute of a twist drill
US6474425B1 (en) * 2000-07-19 2002-11-05 Smith International, Inc. Asymmetric diamond impregnated drill bit
US7730965B2 (en) 2002-12-13 2010-06-08 Weatherford/Lamb, Inc. Retractable joint and cementing shoe for use in completing a wellbore
US6899186B2 (en) * 2002-12-13 2005-05-31 Weatherford/Lamb, Inc. Apparatus and method of drilling with casing
US6766937B2 (en) * 2002-12-20 2004-07-27 Kimberly-Clark Worldwide, Inc. Ultrasonic rotary horn repair
US7469757B2 (en) * 2002-12-23 2008-12-30 Smith International, Inc. Drill bit with diamond impregnated cutter element
US20040231894A1 (en) * 2003-05-21 2004-11-25 Dvorachek Harold A Rotary tools or bits
US7650944B1 (en) 2003-07-11 2010-01-26 Weatherford/Lamb, Inc. Vessel for well intervention
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
US20050230150A1 (en) * 2003-08-28 2005-10-20 Smith International, Inc. Coated diamonds for use in impregnated diamond bits
WO2005034791A1 (en) * 2003-10-09 2005-04-21 Farzad Shaygan A drill bit with a moissanite (silicon carbide) cutting element
US20050133276A1 (en) * 2003-12-17 2005-06-23 Azar Michael G. Bits and cutting structures
US20080101977A1 (en) * 2005-04-28 2008-05-01 Eason Jimmy W Sintered bodies for earth-boring rotary drill bits and methods of forming the same
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
US7243745B2 (en) * 2004-07-28 2007-07-17 Baker Hughes Incorporated Cutting elements and rotary drill bits including same
US20060024140A1 (en) * 2004-07-30 2006-02-02 Wolff Edward C Removable tap chasers and tap systems including the same
US7248491B1 (en) 2004-09-10 2007-07-24 Xilinx, Inc. Circuit for and method of implementing a content addressable memory in a programmable logic device
US7350599B2 (en) * 2004-10-18 2008-04-01 Smith International, Inc. Impregnated diamond cutting structures
US7278499B2 (en) * 2005-01-26 2007-10-09 Baker Hughes Incorporated Rotary drag bit including a central region having a plurality of cutting structures
US20060185254A1 (en) * 2005-02-18 2006-08-24 Akira Hirai Titanium coated diamond containing edge material and method for manufacturing the 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
US7597159B2 (en) * 2005-09-09 2009-10-06 Baker Hughes Incorporated Drill bits and drilling tools including abrasive wear-resistant materials
US7703555B2 (en) 2005-09-09 2010-04-27 Baker Hughes Incorporated Drilling tools having hardfacing with nickel-based matrix materials and hard particles
US7997359B2 (en) 2005-09-09 2011-08-16 Baker Hughes Incorporated Abrasive wear-resistant hardfacing materials, drill bits and drilling tools including abrasive wear-resistant hardfacing materials
US8002052B2 (en) 2005-09-09 2011-08-23 Baker Hughes Incorporated Particle-matrix composite drill bits with hardfacing
CA2662966C (en) 2006-08-30 2012-11-13 Baker Hughes Incorporated Methods for applying wear-resistant material to exterior surfaces of earth-boring tools and resulting structures
JP4674606B2 (en) * 2005-10-18 2011-04-20 株式会社村田製作所 Thin-film capacitor
US7757793B2 (en) * 2005-11-01 2010-07-20 Smith International, Inc. Thermally stable polycrystalline ultra-hard constructions
US7776256B2 (en) 2005-11-10 2010-08-17 Baker Huges Incorporated Earth-boring rotary drill bits and methods of manufacturing earth-boring rotary drill bits having particle-matrix composite bit bodies
US7802495B2 (en) * 2005-11-10 2010-09-28 Baker Hughes Incorporated Methods of forming earth-boring rotary drill bits
US7784567B2 (en) * 2005-11-10 2010-08-31 Baker Hughes Incorporated Earth-boring rotary drill bits including bit bodies comprising reinforced titanium or titanium-based alloy matrix materials, and methods for forming such bits
US7913779B2 (en) * 2005-11-10 2011-03-29 Baker Hughes Incorporated Earth-boring rotary drill bits including bit bodies having boron carbide particles in aluminum or aluminum-based alloy matrix materials, and methods for forming such bits
US7807099B2 (en) 2005-11-10 2010-10-05 Baker Hughes Incorporated Method for forming earth-boring tools comprising silicon carbide composite materials
WO2007089590A3 (en) * 2006-01-26 2008-01-10 Univ Utah Res Found Polycrystalline abrasive composite cutter
WO2007107181A3 (en) 2006-03-17 2007-11-08 Halliburton Energy Serv Inc Matrix drill bits with back raked cutting elements
EP2327856B1 (en) 2006-04-27 2016-06-08 Kennametal Inc. Modular fixed cutter earth-boring bits, modular fixed cutter earth-boring bit bodies, and related methods
US8240404B2 (en) * 2006-08-11 2012-08-14 Hall David R Roof bolt bit
US7866419B2 (en) * 2006-07-19 2011-01-11 Smith International, Inc. Diamond impregnated bits using a novel cutting structure
CA2596094C (en) * 2006-08-08 2011-01-18 Weatherford/Lamb, Inc. Improved milling of cemented tubulars
JP3127512U (en) * 2006-09-05 2006-12-07 きみ子 末田 Work for diamond cutter
CN101522930B (en) 2006-10-25 2012-07-18 Tdy工业公司 Articles having improved resistance to thermal cracking
US9359825B2 (en) * 2006-12-07 2016-06-07 Baker Hughes Incorporated Cutting element placement on a fixed cutter drill bit to reduce diamond table fracture
US7775287B2 (en) * 2006-12-12 2010-08-17 Baker Hughes Incorporated Methods of attaching a shank to a body of an earth-boring drilling tool, and tools formed by such methods
US7841259B2 (en) * 2006-12-27 2010-11-30 Baker Hughes Incorporated Methods of forming bit bodies
US7810588B2 (en) * 2007-02-23 2010-10-12 Baker Hughes Incorporated Multi-layer encapsulation of diamond grit for use in earth-boring bits
US7846551B2 (en) 2007-03-16 2010-12-07 Tdy Industries, Inc. Composite articles
US7841426B2 (en) * 2007-04-05 2010-11-30 Baker Hughes Incorporated Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit
US7845435B2 (en) * 2007-04-05 2010-12-07 Baker Hughes Incorporated Hybrid drill bit and method of drilling
US20100025119A1 (en) * 2007-04-05 2010-02-04 Baker Hughes Incorporated Hybrid drill bit and method of using tsp or mosaic cutters on a hybrid bit
US8517125B2 (en) * 2007-05-18 2013-08-27 Smith International, Inc. Impregnated material with variable erosion properties for rock drilling
US20090065260A1 (en) * 2007-09-12 2009-03-12 Baker Hughes Incorporated Hardfacing containing fullerenes for subterranean tools and methods of making
US7954571B2 (en) * 2007-10-02 2011-06-07 Baker Hughes Incorporated Cutting structures for casing component drillout and earth-boring drill bits including same
US7963348B2 (en) * 2007-10-11 2011-06-21 Smith International, Inc. Expandable earth boring apparatus using impregnated and matrix materials for enlarging a borehole
KR100942983B1 (en) * 2007-10-16 2010-02-17 주식회사 하이닉스반도체 Semiconductor device and method for manufacturing the same
US7730976B2 (en) * 2007-10-31 2010-06-08 Baker Hughes Incorporated Impregnated rotary drag bit and related methods
US20090120008A1 (en) * 2007-11-09 2009-05-14 Smith International, Inc. Impregnated drill bits and methods for making the same
US8678111B2 (en) 2007-11-16 2014-03-25 Baker Hughes Incorporated Hybrid drill bit and design method
US8118119B2 (en) * 2007-12-07 2012-02-21 Varel International Ind., L.P. Impregnated rotary bit
US8061454B2 (en) * 2008-01-09 2011-11-22 Smith International, Inc. Ultra-hard and metallic constructions comprising improved braze joint
US7909121B2 (en) * 2008-01-09 2011-03-22 Smith International, Inc. Polycrystalline ultra-hard compact constructions
US9217296B2 (en) * 2008-01-09 2015-12-22 Smith International, Inc. Polycrystalline ultra-hard constructions with multiple support members
JP5453315B2 (en) * 2008-01-22 2014-03-26 サンーゴバン アブレイシブズ,インコーポレイティド Circular saw blades with offset gullets
US20090272582A1 (en) 2008-05-02 2009-11-05 Baker Hughes Incorporated Modular hybrid drill bit
US8100203B2 (en) * 2008-05-15 2012-01-24 Smith International, Inc. Diamond impregnated bits and method of using and manufacturing the same
US8020640B2 (en) * 2008-05-16 2011-09-20 Smith International, Inc, Impregnated drill bits and methods of manufacturing the same
US8790439B2 (en) 2008-06-02 2014-07-29 Kennametal Inc. Composite sintered powder metal articles
US8221517B2 (en) 2008-06-02 2012-07-17 TDY Industries, LLC Cemented carbide—metallic alloy composites
US7703556B2 (en) * 2008-06-04 2010-04-27 Baker Hughes Incorporated Methods of attaching a shank to a body of an earth-boring tool including a load-bearing joint and tools formed by such methods
US8770324B2 (en) 2008-06-10 2014-07-08 Baker Hughes Incorporated Earth-boring tools including sinterbonded components and partially formed tools configured to be sinterbonded
US8261632B2 (en) 2008-07-09 2012-09-11 Baker Hughes Incorporated Methods of forming earth-boring drill bits
CA2730496C (en) * 2008-07-15 2013-11-19 Baker Hughes Incorporated Earth-boring tools and methods of making earth-boring tools including an impact material, and methods of drilling through casing
US8568205B2 (en) * 2008-08-08 2013-10-29 Saint-Gobain Abrasives, Inc. Abrasive tools having a continuous metal phase for bonding an abrasive component to a carrier
US8025112B2 (en) 2008-08-22 2011-09-27 Tdy Industries, Inc. Earth-boring bits and other parts including cemented carbide
US8322465B2 (en) 2008-08-22 2012-12-04 TDY Industries, LLC Earth-boring bit parts including hybrid cemented carbides and methods of making the same
US8083011B2 (en) * 2008-09-29 2011-12-27 Sreshta Harold A Matrix turbine sleeve and method for making same
US8720609B2 (en) 2008-10-13 2014-05-13 Baker Hughes Incorporated Drill bit with continuously sharp edge cutting elements
US8047307B2 (en) 2008-12-19 2011-11-01 Baker Hughes Incorporated Hybrid drill bit with secondary backup cutters positioned with high side rake angles
US8210287B1 (en) 2009-01-05 2012-07-03 Diamond Products, Limited Mining core drill bit and method of making thereof
US20100181116A1 (en) * 2009-01-16 2010-07-22 Baker Hughes Incororated Impregnated drill bit with diamond pins
WO2010088504A1 (en) * 2009-01-29 2010-08-05 Smith International, Inc. Brazing methods for pdc cutters
US9097067B2 (en) * 2009-02-12 2015-08-04 Saint-Gobain Abrasives, Inc. Abrasive tip for abrasive tool and method for forming and replacing thereof
US8689910B2 (en) * 2009-03-02 2014-04-08 Baker Hughes Incorporated Impregnation bit with improved cutting structure and blade geometry
US8141664B2 (en) 2009-03-03 2012-03-27 Baker Hughes Incorporated Hybrid drill bit with high bearing pin angles
US8220567B2 (en) * 2009-03-13 2012-07-17 Baker Hughes Incorporated Impregnated bit with improved grit protrusion
US8393939B2 (en) * 2009-03-31 2013-03-12 Saint-Gobain Abrasives, Inc. Dust collection for an abrasive tool
US8943663B2 (en) * 2009-04-15 2015-02-03 Baker Hughes Incorporated Methods of forming and repairing cutting element pockets in earth-boring tools with depth-of-cut control features, and tools and structures formed by such methods
US8225890B2 (en) * 2009-04-21 2012-07-24 Baker Hughes Incorporated Impregnated bit with increased binder percentage
US8146688B2 (en) * 2009-04-22 2012-04-03 Baker Hughes Incorporated Drill bit with prefabricated cuttings splitter and method of making
US8056651B2 (en) 2009-04-28 2011-11-15 Baker Hughes Incorporated Adaptive control concept for hybrid PDC/roller cone bits
US8272816B2 (en) 2009-05-12 2012-09-25 TDY Industries, LLC Composite cemented carbide rotary cutting tools and rotary cutting tool blanks
US8459378B2 (en) 2009-05-13 2013-06-11 Baker Hughes Incorporated Hybrid drill bit
US8201610B2 (en) 2009-06-05 2012-06-19 Baker Hughes Incorporated Methods for manufacturing downhole tools and downhole tool parts
US8157026B2 (en) 2009-06-18 2012-04-17 Baker Hughes Incorporated Hybrid bit with variable exposure
US8763617B2 (en) * 2009-06-24 2014-07-01 Saint-Gobain Abrasives, Inc. Material removal systems and methods utilizing foam
US8887839B2 (en) * 2009-06-25 2014-11-18 Baker Hughes Incorporated Drill bit for use in drilling subterranean formations
RU2012103934A (en) 2009-07-08 2013-08-20 Бейкер Хьюз Инкорпорейтед The cutting element for a drill bit for drilling subterranean formations
EP2452036A2 (en) 2009-07-08 2012-05-16 Baker Hughes Incorporated Cutting element and method of forming thereof
US8308096B2 (en) 2009-07-14 2012-11-13 TDY Industries, LLC Reinforced roll and method of making same
EP2479002A3 (en) 2009-07-27 2013-10-02 Baker Hughes Incorporated Abrasive article
US8573330B2 (en) 2009-08-07 2013-11-05 Smith International, Inc. Highly wear resistant diamond insert with improved transition structure
CN104712252A (en) 2009-08-07 2015-06-17 史密斯国际有限公司 Polycrystalline diamond material with high toughness and high wear resistance
WO2011017582A3 (en) * 2009-08-07 2011-05-12 Smith International, Inc. Functionally graded polycrystalline diamond insert
US20110036643A1 (en) * 2009-08-07 2011-02-17 Belnap J Daniel Thermally stable polycrystalline diamond constructions
EP2462310A4 (en) * 2009-08-07 2014-04-02 Smith International Method of forming a thermally stable diamond cutting element
US8857541B2 (en) * 2009-08-07 2014-10-14 Smith International, Inc. Diamond transition layer construction with improved thickness ratio
WO2011035051A3 (en) 2009-09-16 2011-06-09 Baker Hughes Incorporated External, divorced pdc bearing assemblies for hybrid drill bits
US8590646B2 (en) * 2009-09-22 2013-11-26 Longyear Tm, Inc. Impregnated cutting elements with large abrasive cutting media and methods of making and using the same
US8448724B2 (en) * 2009-10-06 2013-05-28 Baker Hughes Incorporated Hole opener with hybrid reaming section
US8191635B2 (en) 2009-10-06 2012-06-05 Baker Hughes Incorporated Hole opener with hybrid reaming section
US9643236B2 (en) 2009-11-11 2017-05-09 Landis Solutions Llc Thread rolling die and method of making same
WO2011082377A3 (en) 2009-12-31 2011-11-17 Saint-Gobain Abrasives, Inc. Abrasive article incorporating an infiltrated abrasive segment
CN102985197A (en) 2010-05-20 2013-03-20 贝克休斯公司 Methods of forming at least a portion of earth-boring tools, and articles formed by such methods
CN103003011A (en) 2010-05-20 2013-03-27 贝克休斯公司 Methods of forming at least a portion of earth-boring tools
CN103003010A (en) 2010-05-20 2013-03-27 贝克休斯公司 Methods of forming at least a portion of earth-boring tools, and articles formed by such methods
CN103080458B (en) 2010-06-29 2016-01-20 贝克休斯公司 Anti-drill having a drill slot structure liable old
US8911522B2 (en) 2010-07-06 2014-12-16 Baker Hughes Incorporated Methods of forming inserts and earth-boring tools
CN103313826A (en) 2010-07-12 2013-09-18 圣戈班磨料磨具有限公司 Abrasive article for shaping of industrial materials
US9023493B2 (en) 2010-07-13 2015-05-05 L. Pierre de Rochemont Chemically complex ablative max-phase material and method of manufacture
US9567807B2 (en) 2010-10-05 2017-02-14 Baker Hughes Incorporated Diamond impregnated cutting structures, earth-boring drill bits and other tools including diamond impregnated cutting structures, and related methods
US8978786B2 (en) 2010-11-04 2015-03-17 Baker Hughes Incorporated System and method for adjusting roller cone profile on hybrid bit
DE102010055201A1 (en) * 2010-12-20 2012-06-21 Eads Deutschland Gmbh A method for producing a component
US20120192680A1 (en) * 2011-01-27 2012-08-02 Baker Hughes Incorporated Fabricated Mill Body with Blade Pockets for Insert Placement and Alignment
WO2012109234A3 (en) 2011-02-11 2013-04-25 Baker Hughes Incorporated System and method for leg retention on hybrid bits
US9782857B2 (en) 2011-02-11 2017-10-10 Baker Hughes Incorporated Hybrid drill bit having increased service life
US8778259B2 (en) 2011-05-25 2014-07-15 Gerhard B. Beckmann Self-renewing cutting surface, tool and method for making same using powder metallurgy and densification techniques
US8807247B2 (en) 2011-06-21 2014-08-19 Baker Hughes Incorporated Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and methods of forming such cutting elements for earth-boring tools
RU2013155458A (en) * 2011-07-13 2015-06-20 Варел Интернэшнл Инд., Л.П. Disc cutters of pdc and rotary drill bit in which cutting wheels are used from pdc
US8672552B2 (en) * 2011-07-15 2014-03-18 Us Synthetic Corporation Bearing assemblies
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
EP3159475A1 (en) 2011-11-15 2017-04-26 Baker Hughes Incorporated Hybrid drill bits having increased drilling efficiency
WO2013074111A1 (en) * 2011-11-18 2013-05-23 De Rochemont L Pierre Cutting tool and method of manufacture
US9169696B2 (en) 2011-12-06 2015-10-27 Baker Hughes Incorporated Cutting structures, earth-boring tools including such cutting structures, and related methods
CA2861918C (en) 2012-01-20 2017-02-14 Baker Hughes Incorporated Superabrasive-impregnated earth-boring tools with extended features and aggressive compositions, and related methods
US9359828B2 (en) * 2012-03-21 2016-06-07 Baker Hughes Incorporated Self-sharpening cutting elements, earth-boring tools including such cutting elements, and methods of forming such cutting elements
US8997897B2 (en) 2012-06-08 2015-04-07 Varel Europe S.A.S. Impregnated diamond structure, method of making same, and applications for use of an impregnated diamond structure
CA2825729A1 (en) 2012-11-21 2014-05-21 Diamond Products, Limited Diamond mining core drill bit and methods of making thereof
US9243458B2 (en) 2013-02-27 2016-01-26 Baker Hughes Incorporated Methods for pre-sharpening impregnated cutting structures for bits, resulting cutting structures and drill bits so equipped
US20140246254A1 (en) * 2013-03-01 2014-09-04 Baker Hughes Incorporated Methods of attaching cutting elements to casing bits and related structures
US9428967B2 (en) 2013-03-01 2016-08-30 Baker Hughes Incorporated Polycrystalline compact tables for cutting elements and methods of fabrication
GB201305873D0 (en) * 2013-03-31 2013-05-15 Element Six Abrasives Sa Superhard constructions & method of making same
CA2854691C (en) 2013-07-03 2017-10-31 Karl H. Moller Method of making diamond mining core drill bit and reamer
WO2017011415A1 (en) * 2015-07-16 2017-01-19 Schlumberger Technology Corporation Infiltrated cutting tools and related methods
US20170274398A1 (en) * 2016-03-23 2017-09-28 Alfa Laval Corporate Ab Apparatus for dispersing particles in a fluid

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2326908A (en) * 1942-05-29 1943-08-17 Jr Edward B Williams Drill bit
US3841852A (en) * 1972-01-24 1974-10-15 Christensen Diamond Prod Co Abraders, abrasive particles and methods for producing same
EP0029535A1 (en) * 1979-11-19 1981-06-03 General Electric Company Compacts for diamond drill and saw applications
EP0284579A1 (en) * 1987-03-13 1988-09-28 Sandvik Aktiebolag Cemented carbide tool
US4844185A (en) * 1986-11-11 1989-07-04 Reed Tool Company Limited Rotary drill bits
EP0356097A2 (en) * 1988-08-15 1990-02-28 De Beers Industrial Diamond Division (Proprietary) Limited Tool insert
EP0601840A1 (en) * 1992-12-10 1994-06-15 Camco Drilling Group Limited Improvements in or relating to cutting elements for rotary drill bits
US5560440A (en) * 1993-02-12 1996-10-01 Baker Hughes Incorporated Bit for subterranean drilling fabricated from separately-formed major components

Family Cites Families (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2371489A (en) 1943-08-09 1945-03-13 Sam P Daniel Drill bit
US2582231A (en) 1949-02-05 1952-01-15 Wheel Trueing Tool Co Abrasive tool and method of making same
US3106973A (en) 1960-09-26 1963-10-15 Christensen Diamond Prod Co Rotary drill bits
US3800891A (en) 1968-04-18 1974-04-02 Hughes Tool Co Hardfacing compositions and gage hardfacing on rolling cutter rock bits
US3537538A (en) 1969-05-21 1970-11-03 Christensen Diamond Prod Co Impregnated diamond bit
US3709308A (en) * 1970-12-02 1973-01-09 Christensen Diamond Prod Co Diamond drill bits
USRE32380E (en) 1971-12-27 1987-03-24 General Electric Company Diamond tools for machining
US3871840A (en) 1972-01-24 1975-03-18 Christensen Diamond Prod Co Abrasive particles encapsulated with a metal envelope of allotriomorphic dentrites
DE2400062B2 (en) 1973-01-03 1976-08-26 Drilling tool and process for its production.
US3938599A (en) 1974-03-27 1976-02-17 Hycalog, Inc. Rotary drill bit
US4098362A (en) 1976-11-30 1978-07-04 General Electric Company Rotary drill bit and method for making same
US4176723A (en) * 1977-11-11 1979-12-04 DTL, Incorporated Diamond drill bit
US4128136A (en) 1977-12-09 1978-12-05 Lamage Limited Drill bit
US4274769A (en) 1978-04-21 1981-06-23 Acker Drill Company, Inc. Impregnated diamond drill bit construction
US4234048A (en) 1978-06-12 1980-11-18 Christensen, Inc. Drill bits embodying impregnated segments
US4333540A (en) 1978-10-02 1982-06-08 General Electric Company Cutter element and cutter for rock drilling
US4255165A (en) 1978-12-22 1981-03-10 General Electric Company Composite compact of interleaved polycrystalline particles and cemented carbide masses
US4274840A (en) 1979-01-08 1981-06-23 Smith International, Inc Wear resistant composite insert, boring tool using such insert, and method for making the insert
US4465148A (en) * 1979-11-29 1984-08-14 Smith International, Inc. Eccentric counterbore for diamond insert stud
CA1216158A (en) 1981-11-09 1987-01-06 Akio Hara Composite compact component and a process for the production of the same
US4629373A (en) * 1983-06-22 1986-12-16 Megadiamond Industries, Inc. Polycrystalline diamond body with enhanced surface irregularities
DE3347501C3 (en) 1983-12-29 1993-12-02 Uwe Christian Seefluth Drilling tool with carbide insert body preparation process for carbide insert body
US4570725A (en) * 1984-01-31 1986-02-18 Nl Industries, Inc. Drill bit cutter
EP0156235B1 (en) * 1984-03-26 1989-05-24 Eastman Christensen Company Multi-component cutting element using consolidated rod-like polycrystalline diamond
US4726718A (en) * 1984-03-26 1988-02-23 Eastman Christensen Co. Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks
US4525178B1 (en) 1984-04-16 1990-03-27 Megadiamond Ind Inc
US4889017A (en) 1984-07-19 1989-12-26 Reed Tool Co., Ltd. Rotary drill bit for use in drilling holes in subsurface earth formations
US4991670A (en) 1984-07-19 1991-02-12 Reed Tool Company, Ltd. Rotary drill bit for use in drilling holes in subsurface earth formations
US4670025A (en) 1984-08-13 1987-06-02 Pipkin Noel J Thermally stable diamond compacts
US4592433A (en) 1984-10-04 1986-06-03 Strata Bit Corporation Cutting blank with diamond strips in grooves
DE3675480D1 (en) 1985-08-22 1990-12-13 De Beers Ind Diamond Tool part.
US4719979A (en) 1986-03-24 1988-01-19 Smith International, Inc. Expendable diamond drag bit
US4943488A (en) 1986-10-20 1990-07-24 Norton Company Low pressure bonding of PCD bodies and method for drill bits and the like
US5413772A (en) 1987-03-30 1995-05-09 Crystallume Diamond film and solid particle composite structure and methods for fabricating same
JPH066769B2 (en) 1987-07-10 1994-01-26 工業技術院長 Diamond sintered body and its manufacturing method
US5090491A (en) 1987-10-13 1992-02-25 Eastman Christensen Company Earth boring drill bit with matrix displacing material
GB2212190B (en) 1987-11-12 1991-12-11 Reed Tool Co Improvements in cutting structures for rotary drill bits
US4877096A (en) 1987-11-17 1989-10-31 Eastman Christensen Company Replaceable cutter using internal ductile metal receptacles
US5099935A (en) 1988-01-28 1992-03-31 Norton Company Reinforced rotary drill bit
CA1325110C (en) 1988-08-04 1993-12-14 Trevor John Martell Thermally stable diamond abrasive compact body
US4990403A (en) 1989-01-20 1991-02-05 Idemitsu Petrochemical Company Limited Diamond coated sintered body
GB8907618D0 (en) 1989-04-05 1989-05-17 Morrison Pumps Sa Drilling
US5158148A (en) * 1989-05-26 1992-10-27 Smith International, Inc. Diamond-containing cemented metal carbide
GB2234542B (en) * 1989-08-04 1993-03-31 Reed Tool Co Improvements in or relating to cutting elements for rotary drill bits
US5049164A (en) 1990-01-05 1991-09-17 Norton Company Multilayer coated abrasive element for bonding to a backing
US5147001A (en) 1990-03-06 1992-09-15 Norton Company Drill bit cutting array having discontinuities therein
EP0462955B1 (en) * 1990-06-15 1995-12-27 Diamant Boart Stratabit S.A. Improved tools for cutting rock drilling
US5103922A (en) 1990-10-30 1992-04-14 Smith International, Inc. Fishtail expendable diamond drag bit
US5355750A (en) 1991-03-01 1994-10-18 Baker Hughes Incorporated Rolling cone bit with improved wear resistant inserts
US5348108A (en) 1991-03-01 1994-09-20 Baker Hughes Incorporated Rolling cone bit with improved wear resistant inserts
US5238074A (en) 1992-01-06 1993-08-24 Baker Hughes Incorporated Mosaic diamond drag bit cutter having a nonuniform wear pattern
US5282513A (en) 1992-02-04 1994-02-01 Smith International, Inc. Thermally stable polycrystalline diamond drill bit
US5279375A (en) 1992-03-04 1994-01-18 Baker Hughes Incorporated Multidirectional drill bit cutter
US5460233A (en) 1993-03-30 1995-10-24 Baker Hughes Incorporated Diamond cutting structure for drilling hard subterranean formations
US5431239A (en) 1993-04-08 1995-07-11 Tibbitts; Gordon A. Stud design for drill bit cutting element
GB9310500D0 (en) 1993-05-21 1993-07-07 De Beers Ind Diamond Cutting tool
US5590729A (en) * 1993-12-09 1997-01-07 Baker Hughes Incorporated Superhard cutting structures for earth boring with enhanced stiffness and heat transfer capabilities
US5615747A (en) 1994-09-07 1997-04-01 Vail, Iii; William B. Monolithic self sharpening rotary drill bit having tungsten carbide rods cast in steel alloys
US5533582A (en) 1994-12-19 1996-07-09 Baker Hughes, Inc. Drill bit cutting element
GB9500659D0 (en) 1995-01-13 1995-03-08 Camco Drilling Group Ltd Improvements in or relating to rotary drill bits
US5564511A (en) * 1995-05-15 1996-10-15 Frushour; Robert H. Composite polycrystalline compact with improved fracture and delamination resistance
US5592995A (en) * 1995-06-06 1997-01-14 Baker Hughes Incorporated Earth-boring bit having shear-cutting heel elements
US5566779A (en) 1995-07-03 1996-10-22 Dennis Tool Company Insert for a drill bit incorporating a PDC layer having extended side portions
US5743346A (en) 1996-03-06 1998-04-28 General Electric Company Abrasive cutting element and drill bit
US5788001A (en) 1996-04-18 1998-08-04 Camco Drilling Group Limited Of Hycalog Elements faced with superhard material
EP0822318B1 (en) * 1996-08-01 2002-06-05 Camco International (UK) Limited Improvements in or relating to rotary drill bits
US6073518A (en) 1996-09-24 2000-06-13 Baker Hughes Incorporated Bit manufacturing method
US5829541A (en) * 1996-12-27 1998-11-03 General Electric Company Polycrystalline diamond cutting element with diamond ridge pattern
US6039641A (en) * 1997-04-04 2000-03-21 Sung; Chien-Min Brazed diamond tools by infiltration
US5979578A (en) 1997-06-05 1999-11-09 Smith International, Inc. Multi-layer, multi-grade multiple cutting surface PDC cutter
US6095265A (en) 1997-08-15 2000-08-01 Smith International, Inc. Impregnated drill bits with adaptive matrix
US5928071A (en) * 1997-09-02 1999-07-27 Tempo Technology Corporation Abrasive cutting element with increased performance
US6102140A (en) * 1998-01-16 2000-08-15 Dresser Industries, Inc. Inserts and compacts having coated or encrusted diamond particles
US6241036B1 (en) 1998-09-16 2001-06-05 Baker Hughes Incorporated Reinforced abrasive-impregnated cutting elements, drill bits including same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2326908A (en) * 1942-05-29 1943-08-17 Jr Edward B Williams Drill bit
US3841852A (en) * 1972-01-24 1974-10-15 Christensen Diamond Prod Co Abraders, abrasive particles and methods for producing same
EP0029535A1 (en) * 1979-11-19 1981-06-03 General Electric Company Compacts for diamond drill and saw applications
US4844185A (en) * 1986-11-11 1989-07-04 Reed Tool Company Limited Rotary drill bits
EP0284579A1 (en) * 1987-03-13 1988-09-28 Sandvik Aktiebolag Cemented carbide tool
EP0356097A2 (en) * 1988-08-15 1990-02-28 De Beers Industrial Diamond Division (Proprietary) Limited Tool insert
EP0601840A1 (en) * 1992-12-10 1994-06-15 Camco Drilling Group Limited Improvements in or relating to cutting elements for rotary drill bits
US5560440A (en) * 1993-02-12 1996-10-01 Baker Hughes Incorporated Bit for subterranean drilling fabricated from separately-formed major components

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6742611B1 (en) 1998-09-16 2004-06-01 Baker Hughes Incorporated Laminated and composite impregnated cutting structures for drill bits
BE1014945A3 (en) * 2000-05-30 2004-07-06 Baker Hughes Inc Structure of cutting drilling subterranean.
US7814895B2 (en) 2003-08-14 2010-10-19 Diamond Innovations, Inc. System and method for cutting granite or similar materials
US8047192B2 (en) 2003-08-14 2011-11-01 Ehwa Diamond Industrial Co., Ltd. System and method for cutting granite or similar materials
US7497280B2 (en) 2005-01-27 2009-03-03 Baker Hughes Incorporated Abrasive-impregnated cutting structure having anisotropic wear resistance and drag bit including same
US8333814B2 (en) 2005-01-27 2012-12-18 Baker Hughes Incorporated Abrasive-impregnated cutting structure having anisotropic wear resistance and drag bit including same
US8662207B2 (en) 2005-01-27 2014-03-04 Baker Hughes Incorporated Rotary drag bits including abrasive-impregnated cutting structures
US9637979B2 (en) 2005-01-27 2017-05-02 Baker Hughes Incorporated Rotary drag bits including abrasive-impregnated cutting structures
WO2016187202A1 (en) * 2015-05-18 2016-11-24 Halliburton Energy Services, Inc. Methods of removing shoulder powder from fixed cutter bits

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US6458471B2 (en) 2002-10-01 grant
US6742611B1 (en) 2004-06-01 grant
US6241036B1 (en) 2001-06-05 grant

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