Entries |
Document | Title | Date |
20080202820 | CONSOLIDATED HARD MATERIALS, EARTH-BORING ROTARY DRILL BITS INCLUDING SUCH HARD MATERIALS, AND METHODS OF FORMING SUCH HARD MATERIALS - The present invention includes consolidated hard materials, methods for producing them, and industrial drilling and cutting applications for them. A consolidated hard material may be produced using hard particles such as B | 08-28-2008 |
20080210473 | HYBRID CARBON NANOTUBE REINFORCED COMPOSITE BODIES - A composite body for cutting tools that includes a ductile phase; a plurality of carbide particles dispersed the ductile phase; and a plurality of nanotubes integrated into the composite body is disclosed. Methods of making such composite bodies and drill bits formed of such material are also disclosed. | 09-04-2008 |
20090020339 | Rotationally indexable cutting elements and drill bits therefor - A cutting element for use with a drill bit includes a substrate having a longitudinal axis, a lateral surface substantially symmetric about the longitudinal axis and one or more key elements coupled to the lateral surface. The lateral surface lies between an insertion end and a cutting end of the substrate. The one or more key elements are substantially axially aligned with the longitudinal axis and configured to selectively rotationally locate the substrate in a pocket. A drill bit configured for retaining a cutting element having one or more key elements is also disclosed. | 01-22-2009 |
20090152016 | CUTTING ELEMENTS AND BITS INCORPORATING THE SAME - Cutting elements and bits incorporating such cutting elements are provided. The cutting elements have a substrate, a first ultra hard material layer formed over the substrate, and a second ultra hard material layer formed over the first ultra hard material layer. The second ultra hard material layer has a thickness in the range of 0.05 mm to 2 mm. | 06-18-2009 |
20090229888 | METHODS AND SYSTEMS FOR DESIGNING AND/OR SELECTING DRILLING EQUIPMENT USING PREDICTIONS OF ROTARY DRILL BIT WALK - Methods and systems may be provided simulating forming a wide variety of directional wellbores including wellbores with variable tilt rates and/or relatively constant tilt rates. The methods and systems may also be used to simulate forming a wellbore in subterranean formations having a combination of soft, medium and hard formation materials, multiple layers of formation materials and relatively hard stringers disposed throughout one or more layers of formation material. Values of steer force, bit walk rate and average walk rate from such simulations may be used to design and/or select drilling equipment for use in forming a directional wellbore. | 09-17-2009 |
20090260893 | MATRIX POWDER FOR MATRIX BODY FIXED CUTTER BITS - A matrix powder for forming a matrix bit body, the matrix powder essentially consisting of a plurality of carbide particles having a particle size distribution of ±20% of a median particle size; and a plurality of metal binder particles is disclosed. | 10-22-2009 |
20090260894 | Jack Element for a Drill Bit - In one aspect of the present invention, a drill bit has an axis of rotation and a working face with a plurality of blades extending outwardly from a bit body. The blades form in part an inverted conical region, and a plurality of cutters with a cutting surface is arrayed along the blades. A jack element is coaxial with the axis of rotation and extends within the conical region within a range defined by the cutting surface of at least one cutter. | 10-22-2009 |
20100000798 | METHOD TO REDUCE CARBIDE EROSION OF PDC CUTTER - An abrasive wear-resistant material includes a matrix and sintered and cast tungsten carbide granules. A device for use in drilling subterranean formations includes a first structure secured to a second structure with a bonding material. An abrasive wear-resistant material covers the bonding material. The first structure may include a drill bit body and the second structure may include a cutting element. A method for applying an abrasive wear-resistant material to a drill bit includes providing a bit, mixing sintered and cast tungsten carbide granules in a matrix material to provide a pre-application material, heating the pre-application material to melt the matrix material, applying the pre-application material to the bit, and solidifying the material. A method for securing a cutting element to a bit body includes providing an abrasive wear-resistant material to a surface of a drill bit that covers a brazing alloy disposed between the cutting element and the bit body. | 01-07-2010 |
20100000799 | Indenting Member for a Drill Bit - A drill bit has a bit body intermediate a working face and a shank end adapted for connection to a downhole drill string. The working face has at least three fixed blades converging towards a center of the working face and diverging towards a gauge of the bit, at least one blade having a cone region adjacent the center of the working face. The cone region increases in height away from the center of the working face and towards a nose portion of the at least one blade. An opening is formed in the working face at the center of the bit along an axis of the drill bit's rotation, the opening leading into a chamber with at least one wall. An indenting member is disposed within and extends from the opening, is substantially coaxial with the axis of rotation, and is fixed to the wall of the chamber. | 01-07-2010 |
20100018780 | PDC BIT HAVING SPLIT BLADES - A drill bit for drilling a borehole in a formation, the drill bit including a bit body having a bit face including a cone region, a nose region, a shoulder region, and a gage region, at least one disjointed blade disposed on the bit face, the disjointed blade including a first section beginning proximate a central axis of the bit and extending less than full gage, and a second section beginning a selected distance from the central axis and extending to full gage, and a plurality of cutting elements mounted on the at least one disjointed blade is disclosed. | 01-28-2010 |
20100038147 | TOUGH CARBIDE BODIES USING ENCAPSULATED CARBIDES - A drill bit that includes a bit body having a plurality of blades extending radially therefrom, wherein at least a portion of the bit body comprises a first matrix region comprising a plurality of primary carbide particles having an average mean free path of at least about 10 microns; and at least one cutting element for engaging a formation disposed on at least one of the plurality of blades is disclosed. | 02-18-2010 |
20100108400 | HARD METAL PLATE FOR ROCK DRILL AND ROCK DRILL - In a hard metal plate for insertion in to a seat formed at one end of a drill shaft of a rock drill, comprising a substantially rectangular base shape having two opposed long sides extending in the axial direction of the drill shaft which are at least partially covered by the seat, two opposed, substantially axial free short sides, a radial bottom side facing towards the seat and a cutting face facing away from the seat, both short sides are formed by an axial section having a purely axial direction component and a conical section inclined towards the axial direction, so that at the short side, the substantially rectangular plate tapers towards the bottom side. | 05-06-2010 |
20100108401 | Resilient Bit Systems and Methods - The present invention relates to drill bits and methods of making drill bits. In one embodiment, a drill bit includes a bit body having at least one independent blade, in which the blade is attached to the bit body by way of a piece that is attached to a force absorbing material. In another embodiment, a drill bit includes an integrated blade, in which the blade is cut into segments allowing the segments of the blade to independently flex. | 05-06-2010 |
20100155148 | Earth-Boring Particle-Matrix Rotary Drill Bit and Method of Making the Same - An earth-boring rotary drill bit includes a bit body configured to carry one or more cutters for engaging a subterranean earth formation. The bit body includes a particle-matrix composite material having a plurality of hard particles dispersed throughout a matrix material, the particle-matrix composite material having a first coefficient of thermal expansion. The bit body also includes insert disposed in the bit body. The insert has a second coefficient of thermal expansion that is greater than the first coefficient of thermal expansion of the matrix. | 06-24-2010 |
20100181116 | IMPREGNATED DRILL BIT WITH DIAMOND PINS - A method of manufacturing a drill bit and several embodiments of a drill bit for drilling a well in an earth formation. In one embodiment, the drill bit comprises a diamond impregnated bit body with one or more thermally stable pins embedded therein. More specifically, the drill bit may include a diamond impregnated bit body having a plurality of blades, with one or more of the blades having a cone section, a nose section, a shoulder section, and a gage section; a plurality of diamond impregnated cutters extending from the blades; and one or more thermally stable polycrystalline diamond pins embedded within, and possibly extending from, at least some of the cutters. In some embodiments, each cutter includes an embedded pin. Alternatively, the pin or pins may be located in the cone, shoulder, nose, and/or gauge sections. | 07-22-2010 |
20100187018 | Earth-Boring Particle-Matrix Rotary Drill Bit and Method of Making the Same - An earth-boring rotary drill bit includes a bit body configured to carry one or more cutters for engaging a subterranean earth formation, the bit body comprising a particle-matrix composite material having a plurality of hard particles dispersed throughout a matrix material, the matrix material comprising a shape memory alloy. The matrix material comprises a metal alloy configured to undergo a reversible phase transformation between an austenitic phase and a martensitic phase. The matrix material may include an Ni-based alloy, Cu-based alloy, Co-based alloy, Fe-based alloy or Ti-based alloy. The drill bit may be made by a method that includes: providing a plurality of hard particles in a mold to define a particle precursor of the bit body; infiltrating the particle precursor of the bit body with a molten matrix material comprising a shape memory alloy forming a particle-matrix mixture; and cooling the molten particle-matrix mixture to solidify the matrix material and forming a bit body having a particle-matrix composite material comprising a shape memory alloy. | 07-29-2010 |
20100224419 | DRILL BIT WITH INTEGRAL CUTTINGS SPLITTER AND METHOD OF MAKING - Disclosed herein is a downhole drill bit. The drill bit includes, a body, a plurality of cutters attached to the body, and at least one splitter that is integrally formed in the body is in operable communication with at least one of the plurality of cutters such that the splitter bifurcates cuttings cut by the at least one cutter. | 09-09-2010 |
20100230176 | EARTH-BORING TOOLS WITH STIFF INSERT SUPPORT REGIONS AND RELATED METHODS - Earth-boring tools comprising bodies with one or more stiff insert support regions and one or more inserts secured to the one or more stiff insert support regions are disclosed. The inserts may each comprise an insert body, which may be secured to the one or more insert support regions of the body. In some embodiments, one or more insert support regions of the body may have an elastic modulus similar the elastic modulus of the insert body of the one or more inserts. In additional embodiments, one or more insert support regions of the body may have an elastic modulus that is greater than the elastic modulus of the insert body of the one or more inserts. In further embodiments, methods of forming earth-boring tools comprising bodies with one or more stiff insert support regions are disclosed. | 09-16-2010 |
20100236836 | THERMALLY STABLE POLYCRYSTALLINE DIAMOND MATERIAL WITH GRADIENT STRUCTURE - A diamond construction may include a diamond body comprising a plurality of bonded-together diamond crystals forming a matrix phase, and a plurality of interstitial regions disposed between the bonded-together diamond crystals, the diamond body comprising: a first diamond region extending a depth from a surface of the diamond body being substantially free of a catalyst material used to form the diamond body, wherein the first diamond region comprises the matrix phase and in at least a portion of the plurality of interstitial spaces, the first diamond region comprises a metal carbide and an inert metal, wherein the metal carbide is formed as a result of reaction between the diamond crystals in the matrix phase and a carbide-forming metal; and a second diamond region adjacent the first diamond region comprising the matrix phase and a Group VIII metal in the interstitial regions. | 09-23-2010 |
20100263937 | 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 - Methods of forming and repairing earth-boring tools include providing wear-resistant material over a temporary displacement member to form a cutting element pocket in a body and a depth-of-cut control feature using the wear-resistant material. In some embodiments, the wear-resistant material may comprise a particle-matrix composite material. For example, a hardfacing material may be built up over a temporary displacement member to form or repair a cutting element pocket and provide a depth-of-cut control feature. Earth-boring tools include a depth-of-cut control feature comprising a wear-resistant material. The depth-of-cut control feature is configured to limit a depth-of-cut of a cutting element secured within a cutting element pocket partially defined by at least one surface of the depth-of-cut control feature. Intermediate structures formed during fabrication of earth-boring tools include a depth-of-cut control feature extending over a temporary displacement member. | 10-21-2010 |
20100270087 | DRILL BIT WITH PREFABRICATED CUTTINGS SPLITTER AND METHOD OF MAKING - Disclosed herein is a method of making a drill bit for drilling subterranean formations. The method includes, forming a bit mold having at least one recess receptive of a distal portion of a prefabricated splitter, positioning the distal portion into one of the at least one recess, and filling the bit mold with at least one material. | 10-28-2010 |
20100300764 | POLYCRYSTALLINE DIAMOND - A polycrystalline diamond (PCD) material | 12-02-2010 |
20100320004 | Erosion Resistant Subterranean Drill Bits Having Infiltrated Metal Matrix Bodies - Subterranean drill bits having good erosion resistance, strength, toughness, and thermal stability are disclosed. The drill bits comprise a bit body carrying at least one cutting element and having an infiltrated metal matrix. The infiltrated metal matrix comprises a matrix powder composition bound together by an infiltrant. The matrix powder mixture includes cast tungsten carbide powder having a particle size of −30 (600 micron) +140 mesh (106 micron), a second component powder consisting of one or more other types of tungsten carbide particles, and a metal powder. | 12-23-2010 |
20100320005 | DRILL BITS AND METHODS OF MANUFACTURING SUCH DRILL BITS - In one aspect, an impregnated drill bit is provided having at least one insert positioned within at least one of the plurality of blades such that the insert spans more than 75% of the height of the blade and at least a portion of the blade has a blade height of at least 40 mm. In another aspect, an impregnated drill bit is provided having a plurality of blades with at least a portion of at least one blade having a blade height of at least 60 mm. Also provided are methods of manufacturing such impregnated drill bits. | 12-23-2010 |
20100326739 | EARTH-BORING TOOLS COMPRISING SILICON CARBIDE COMPOSITE MATERIALS, AND METHODS OF FORMING SAME - Earth-boring tools for drilling subterranean formations include a particle-matrix composite material comprising a plurality of silicon carbide particles dispersed throughout a matrix material, such as, for example, an aluminum or aluminum-based alloy. In some embodiments, the silicon carbide particles comprise an ABC—SiC material. Methods of manufacturing such tools include providing a plurality of silicon carbide particles within a matrix material. Optionally, the silicon carbide particles may comprise ABC—SiC material, and the ABC—SiC material may be toughened to increase a fracture toughness exhibited by the ABC—SiC material. In some methods, at least one of an infiltration process and a powder compaction and consolidation process may be employed. | 12-30-2010 |
20110017518 | EARTH-BORING TOOLS WITH IMPROVED RETENTION OF CUTTING ELEMENTS INSTALLED WITHIN POCKETS - A rock bit is formed with pockets for enhanced cutting element retention and support of cutting elements during operation of the rock bit. Portions of the pockets are carburized to increase a yield strength of the pockets, which also increases the retention of the cutting elements. The pockets are formed at a diameter that is slightly smaller than an outer diameter of the cutting elements. Portions of the pockets are then carburized. The pockets are heated until the diameter of the pockets is equal to the outer diameter of the cutting elements. After the rock bit has been cooled and cleaned, a material is placed in each pocket prior to installing the cutting elements. The material homogenizes support for the cutting elements during operation of the rock bit. | 01-27-2011 |
20110042147 | FUNCTIONALLY GRADED POLYCRYSTALLINE DIAMOND INSERT - PCD inserts comprise a PCD body having multiple FG-PCD regions with decreasing diamond content moving from a body outer surface to a metallic substrate. The diamond content changes in gradient fashion by changing metal binder content. A region adjacent the outer surface comprises 5 to 20 percent by weight metal binder, and a region remote from the surface comprises 15 to 40 percent by weight metal binder. One or more transition regions are interposed between the PCD body and substrate. The transition region comprises PCD, binder metal, and a carbide, comprises a metal binder content less than that present in the PCD body region positioned next to it. | 02-24-2011 |
20110048811 | DRILL BIT WITH A RETAINED JACK ELEMENT - A drill bit having a bit body intermediate a shank and a working face having at least one cutting insert. A bore is formed in the working face co-axial within an axis of rotation of the drill bit. A jack element is retained within the bore by a retaining element that intrudes a diameter of the bore. | 03-03-2011 |
20110203856 | COMPOSITE CUTTING/MILLING TOOL HAVING DIFFERING CUTTING ELEMENTS AND METHOD FOR MAKING THE SAME - A cutting/milling tool includes a tool body; a cutting end of the tool body; a first plurality of cutting elements having a substantially identical shape disposed at the cutting end of the tool body; and a second plurality of cutting elements having a different shape than the first plurality of cutting elements, the second plurality of cutting elements being substantially identical in shape to each other, the second plurality of cutting elements being interspersed with the first plurality of cutting elements at the cutting end of the tool body. | 08-25-2011 |
20110240377 | Drill Bit Jack Element with a Plurality of Inserts - In one aspect of the present invention, a drill bit has an axis of rotation and drill bit body intermediate a threaded end and a working face. The drill bit body houses a jack element protruding from the drill bit body and the jack element has a plurality of inserts disposed on the indenting end. | 10-06-2011 |
20110278073 | DRILL BIT - A fixed cutter drill bit having a bit axis and a gauge diameter. The drill bit includes a bit body having a proximal end, a distal end, and a plurality of blades extending from the distal end toward the proximal end. The blades define a cutting profile between the bit axis and the gauge diameter. The drill bit further includes a plurality of cutters attached to the blades in a cutter layout. The cutter layout may include a balanced cutter pattern extending from the bit axis toward the gauge diameter. The cutter layout may include one or more sets of shared cutters, wherein each set of shared cutters includes a trailing shared cutter and a leading shared cutter. The blades may define pairs of makeup surfaces and breaker surfaces. The drill bit may include a breaker upset for engaging with a device for supporting the drill bit. | 11-17-2011 |
20110297449 | TOOL WITH WELDED CEMENTED METAL CARBIDE INSERTS WELDED TO STEEL AND/OR CEMENTED METAL CARBIDE - A wear insert comprised of cemented metal carbide is welded to a workpiece made of steel or cemented metal carbide without causing fracturing of the carbide or creating residual stresses that reduce the impact resistance of the part. The part is fabricated using a microwave sintering process prior to welding. | 12-08-2011 |
20110297450 | ULTRA HARD/HARD COMPOSITE MATERIALS - The invention provides for an ultra hard or hard composite material comprising a primary ultra hard or hard particulate material and at least one secondary ultra hard or hard particulate material dispersed in a matrix material. The primary ultra hard or hard particulate material has a thermal expansion coefficient lower than that of the matrix material and the at least one secondary ultra hard or hard particulate material has a thermal expansion coefficient greater than that of the matrix material. | 12-08-2011 |
20120168231 | DRILL BITS WITH BEARING ELEMENTS FOR REDUCING EXPOSURE OF CUTTERS - A bearing element for a rotary, earth boring drag bit effectively reduces an exposure of at least one adjacent cutting element by a readily predictable amount, as well as a depth-of-cut (DOC) of the cutter. The bearing element has a substantially uniform thickness across substantially an entire area thereof The bearing element also limits the amount of unit force applied to a formation so that the formation does not fail. The bearing element may prevent damage to cutters associated therewith, as well as possibly limit problems associated with bit balling, motor stalling and related drilling difficulties. Bits including the bearing elements, molds for forming the bearing elements and portions of bodies of bits that carry the bearing elements, methods for designing and fabricating the bearing elements and bits including the same, and methods for drilling subterranean formations are also disclosed. | 07-05-2012 |
20120205162 | DOWNHOLE TOOLS HAVING FEATURES FOR REDUCING BALLING, METHODS OF FORMING SUCH TOOLS, AND METHODS OF REPAIRING SUCH TOOLS - Downhole tools are provided with a topographical pattern, and anti-balling material is provided over the topographical pattern. The topographical pattern may be defined by at least one of a plurality of recesses extending into a surface of a body of the tool and a plurality of protrusions protruding from the surface. Downhole tools include an insert disposed within a recess in a body, and the insert comprises an anti-balling material having a composition selected to reduce accumulation of formation cuttings on the tools when the tools are used to form or service a wellbore. Downhole tools include anti-balling material disposed over a porous mass provided over the surfaces of the tools. Methods of forming downhole tools include providing anti-balling material over features on and/or in a surface of a body of a tool. Methods of repairing downhole tools include removing an insert therefrom and disposing a replacement insert therein. | 08-16-2012 |
20130087391 | FIXED BLADED DRILL BIT CUTTER PROFILE - A drill bit has a bit body with a plurality of fixed blades and a plurality of cutters disposed on the plurality of blades. The plurality of cutters includes a plurality of flat shear type cutters and at least one conical shaped cutter, wherein the plurality of flat shear type cutters define a cutter profile. | 04-11-2013 |
20130192902 | Drill Bit - A drill bit features a head portion and a connecting portion for attachment to a drilling device. The head portion includes at least two insert pockets, which can contain inserts, with cutting edges that extend from an inner position offset radially from the rotational axis of the bit to an outer cutting edge. The cutting edge is formed by the intersection of a top surface and a wear surface of the insert pocket or insert. The top surface is linear, but may be planar or non-planar. | 08-01-2013 |
20140102810 | BEARING ASSEMBLIES AND APPARATUSES INCLUDING TILTING SUPERHARD BEARING ELEMENTS, AND MOTOR ASSEMBLIES USING THE SAME - Embodiments relate to tilting superhard bearing element bearing assemblies and apparatuses. The disclosed assemblies/apparatuses may be employed in downhole motors of a subterranean drilling system or other mechanical systems. In an embodiment, a bearing assembly may include a support ring and a plurality of superhard bearing elements each of which is tilted and/or tiltably secured relative to the support ring and distributed circumferentially about an axis. Each of the superhard bearing elements includes a bearing surface and a base portion. The base portion of the at least one of the superhard bearing elements may include a tilting feature configured to allow the at least one of the superhard bearing elements to be tiltable about a tilt axis. The bearing assembly includes retaining features that secure the superhard bearing elements to the support ring. | 04-17-2014 |
20140231150 | PARTICULATE MIXTURES FOR FORMING POLYCRYSTALLINE COMPACTS AND EARTH-BORING TOOLS INCLUDING POLYCRYSTALLINE COMPACTS HAVING MATERIAL DISPOSED IN INTERSTITIAL SPACES THEREIN - Polycrystalline compacts include smaller and larger hard grains that are interbonded to fox in a polycrystalline hard material. The larger grains may be at least about 150 times larger than the smaller grains. An interstitial material comprising one or more of a boride, a carbide, a nitride, a metal carbonate, a metal bicarbonate, and a non-catalytic metal may be disposed between the grains. The compacts may be used as cutting elements for earth-boring tools such as drill bits, and may be disposed on a substrate. A particulate mixture includes a first plurality of grains of hard material having a first average grain size of about five hundred nanometers (500 nm) or less and having a coating formed over the grains of hard material. The coating comprises at least one of a boride, a carbide, a nitride, a metal carbonate, a metal bicarbonate, and a non-catalytic metal. | 08-21-2014 |
20140246249 | METHODS FOR FORMING EARTH-BORING TOOLS HAVING CUTTING ELEMENTS MOUNTED IN CUTTING ELEMENT POCKETS AND TOOLS FORMED BY SUCH METHODS - Methods of forming earth-boring tools include using a plasma spray device to gouge at least one recess through a hardfacing material and into a body. At least a portion of the recess may define a cutting element pocket in which a cutting element may be received and bonded. The recess formed using the plasma spray device optionally may be further machined to form the cutting element pocket. Earth-boring tools are fabricated using such methods. | 09-04-2014 |
20140360790 | EDGE PROTECTOR FOR ROOF DRILL BIT CUTTING INSERT - A rotary drill bit includes an elongate drill bit body having a slot at a forward end, an edge protector received in the slot of the drill bit body and a cutting insert having a cutting edge. The edge protector includes: a first side having a first bottom edge and a first top edge; a second side opposed to the first side, the second side having a second bottom edge and a second top edge; and a bottom portion adjoining the first bottom edge of the first side and the second bottom edge of the second side. The cutting insert is received in the edge protector such that the cutting edge is recessed below one of the first top edge of the first side or the second top edge of the second side. | 12-11-2014 |
20150008046 | IMPREGNATED ROTARY BIT WITH HIGH DENSITY MONOBLOCK CENTER STRUCTURE - A drill bit includes a bit body having an end face for engaging a rock formation. The end face is defined by a HIP pressed center structure formed of a metal matrix impregnated with super abrasive particles. The HIP pressed center structure includes a central region located at a center axis of said drill bit and finger regions extending radially from the central region. The end face is further defined by infiltrated ribs formed of a metal matrix impregnated with super abrasive particles. Certain ones of the infiltrated ribs are configured to form radial extensions from the finger regions of the HIP pressed center structure. | 01-08-2015 |
20150075876 | EARTH-BORING TOOLS COMPRISING EUTECTIC OR NEAR-EUTECTIC COMPOSITIONS - Articles comprising at least a portion of an earth-boring tool include at least one insert and a solidified eutectic or near-eutectic composition including a metal phase and a hard material phase. Other articles include a solidified eutectic or near-eutectic composition including a metal phase, a hard material phase and a coating material in contact with the solidified eutectic or near-eutectic composition. | 03-19-2015 |
20150122551 | ROTARY DRILL BIT AND METHOD FOR DESIGNING A ROTARY DRILL BIT FOR DIRECTIONAL AND HORIZONTAL DRILLING - A multi-layer downhole drilling tool designed for directional and horizontal drilling is disclosed. The drilling tool includes a bit body including a rotational axis extending therethrough. A plurality of primary blades are disposed on exterior portions of the bit body and a plurality of secondary blades are disposed on exterior portions of the bit body between the primary blades. The drilling tool further includes a plurality of first-layer cutting elements disposed on exterior portions of the primary blades and a plurality of second-layer cutting elements disposed on exterior portions of the secondary blades. The second-layer cutting elements are track set with the first-layer cutting elements in an opposite track set configuration. | 05-07-2015 |
20150144407 | POLYCRYSTALLINE COMPACTS, EARTH-BORING TOOLS INCLUDING SUCH COMPACTS, AND METHODS OF FABRICATING POLYCRYSTALLINE COMPACTS - A polycrystalline compact includes diamond grains, cubic boron nitride grains, and grains of an additional nitride, carbide, or boride. The additional nitride, carbide, or boride may be aluminum nitride, gallium nitride, silicon nitride, titanium nitride, silicon carbide, titanium carbide, titanium boride, titanium diboride, and/or aluminum boride. The diamond grains, the cubic boron nitride grains, and the grains of the additional nitride, carbide, or boride are intermixed and interbonded to form a polycrystalline material. An earth-boring tool includes a bit body and such a polycrystalline diamond compact secured to the bit body. Methods of fabricating polycrystalline compacts include forming a mixture comprising diamond grains, non-cubic boron nitride grains, and a metal or semimetal; encapsulating the mixture in a container; and subjecting the encapsulated mixture to high-pressure and high-temperature conditions to form a polycrystalline material. | 05-28-2015 |
20150308198 | DRILL BIT INCLUDING BUTTON ARRAY HAVING DIFFERENT RADII EXTENDING FROM CENTER OF HEAD SECTION - A drill bit including a button array having different radii extending from the center of a head section, and more particularly, to a drill bit in which buttons are arranged so as to have different radii from the center of a drill bit head section, thereby striking bedrock points having different radii and improving the efficiency of a drilling operation. | 10-29-2015 |
20160060964 | EARTH-BORING TOOLS WITH EXTENDED CUTTING FEATURES AND RELATED METHODS - A superabrasive-impregnated earth-boring rotary drill bit includes cutting features extending outwardly from a bit body in a nose region of the drill bit. The cutting features comprise a composite material including superabrasive particles embedded within a matrix material. The cutting features extend from an outer surface of the bit body by a relatively high average distance. Methods of forming a superabrasive-impregnated earth-boring rotary drill bit include the formation of cutting features that extend outwardly from a bit body of a drill bit in a nose region of the drill bit. The cutting features are formed to comprise a particle-matrix composite material that includes superabrasive particles embedded within a matrix material. The cutting features are further formed such that they extend from the outer surface of the bit body by a relatively high average distance. | 03-03-2016 |
20160160570 | METHODS FOR FORMING EARTH-BORING TOOLS HAVING CUTTING ELEMENTS MOUNTED IN CUTTING ELEMENT POCKETS AND TOOLS FORMED BY SUCH METHODS - Methods of forming earth-boring tools include using a plasma spray device to gouge at least one recess through a hardfacing material and into a body. At least a portion of the recess may define a cutting element pocket in which a cutting element may be received and bonded. The recess formed using the plasma spray device optionally may be further machined to form the cutting element pocket. Earth-boring tools are fabricated using such methods. | 06-09-2016 |
20160160571 | GROUND WORKING TOOL WITH REPLACEABLE TEETH - A ground working tool comprises a tooth holder ( | 06-09-2016 |