Matches 1 - 50 out of 241 1 2 3 4 5 >
Match Document Document Title
7367413 Cutting elements of gage row and first inner row of a drill bit  
A rolling cone drill bit is provided that has gage inserts on the first row from the bit axis to cut to full gage diameter that have a cutting portion enhanced with a layer of super abrasive...
7216565 Methods of manufacturing and repairing steel body rotary drill bits including support elements affixed to the bit body at least partially defining cutter pocket recesses  
A steel body rotary drag bit for drilling a subterranean formation includes a plurality of support elements affixed to the bit body, each forming at least a portion of a cutting element pocket....
7210377 Cone erosion protection for roller cone drill bits  
A method of forming a drill bit structure, the method including fixing spacers to the drill bit structure. The spacers are arranged at preselected locations on an outer surface of the drill bit...
7182159 Drill member for rock drilling and a method for manufacturing the drill member  
A drill member for percussive rock drilling is formed by forming a compound component and friction welding the compound component to the end of a drill rod. The compound component is formed by...
7159487 Method for making a polycrystalline diamond insert drill bit body  
A method for forming a drill bit body is disclosed which comprises infiltrating powdered tungsten carbide with a binder alloy in a mold. The mold has therein at least one displacement adapted to...
7108598 PDC interface incorporating a closed network of features  
A superhard compact having an improved superabrasive-substrate interface region design for use in drilling bits, cutting tools and wire dies and the like. This compact is designed to provide an...
7044243 High-strength/high-toughness alloy steel drill bit blank  
Drill bit reinforcing members or blanks of this invention are formed from high-strength steels having a carbon content less than about 0.3 percent by weight, a yield strength of at least 55,000...
7032693 Preformed tooth for tooth bit  
A method of forming a tooth rock bit is disclosed. In one embodiment, the method includes attaching the at least one cutting element to a surface of a cone, and depositing a hard facing layer on at...
7025155 Rock bit with channel structure for retaining cutter segments  
A roller cone body defines a circumferential channel or race into which a plurality of cutter or wear segments are mounted. The wear segments may be of any appropriate contour or shape, such as for...
6986297 Method of manufacturing PDC cutters with chambers or passages  
A cutting element for a drill bit used in drilling subterranean formations is formed with an internal chamber or passage for the flow of drilling fluid therethrough. The cutting element includes a...
6948403 Bowed crests for milled tooth bits  
A method of forming milled teeth on a roller cone of a milled tooth roller cone rock bit includes shaping a crest of a chisel shaped milled tooth on the roller cone. The crest is shaped such that...
6786288 Cutting structure for roller cone drill bits  
The invention is directed to a roller cone drill for drilling earth formations and a method of using the same. The drill bit includes a bit body and a plurality of roller cones attached to the bit...
6745645 Enhanced gage protection for milled tooth rock bits  
A drill bit including a bit body having at least one roller cone rotatably coupled to the bit body with a plurality of milled teeth formed on the at least one roller cone is disclosed. At least one...
6711969 Methods for designing rotary drill bits exhibiting sequences of substantially continuously variable cutter backrake angles  
A rotary-type earth-boring drag bit with cutters oriented at varied rake angles and methods for designing such drag bits. Specifically, cutters that are located sequentially adjacent radial...
6658968 Percussive rock drill bit and buttons therefor and method for manufacturing drill bit  
A percussive rock drill bit includes a head portion with a forward surface surrounded by a peripheral surface. The peripheral surface supports a wreath of peripheral buttons. Front buttons are...
6655481 Methods for fabricating drill bits, including assembling a bit crown and a bit body material and integrally securing the bit crown and bit body material to one another  
A method of fabricating the drill bit includes employing known layered-manufacturing techniques to fabricate the bit crown, positioning a bit gage mold adjacent the bit crown, and disposing a core...
6655234 Method of manufacturing PDC cutter with chambers or passages  
The cutting element including a cutting element for a drill bit used in drilling subterranean formations is formed with an internal chamber or passage for the flow of drilling fluid therethrough. A...
6651756 Steel body drill bits with tailored hardfacing structural elements  
Hardfacing is deposited on a PDC-equipped steel body rotary drag bit and forms substantially protruding structural elements, such as wear knots or chip breakers. Hardfacing may also be applied to...
6629476 Bi-center bit adapted to drill casing shoe  
The invention is directed to a bi-center drilling tool adapted to fit within and drill through a casing shoe without damage to the surrounding casing. In one embodiment, the tool comprises a bit...
6615935 Roller cone bits with wear and fracture resistant surface  
Rock bits comprising wear and fracture resistant surface of this invention include a steel bit body having at least one leg extending therefrom. A steel cone is rotatably disposed on the leg. The...
6606923 Design method for drillout bi-center bits  
A method to design a bi-center drill bit designed to drill out the cement and other material in the casing and then proceed to drill out the full gauge drilling diameter borehole with a diameter...
6601475 Hardfaced drill bit structures and method for making such structures  
A method is disclosed for forming a drill bit structure to which a cutting element is to be affixed. The method includes applying a layer of hardfacing material to a basic bit structure, removing...
6598689 Roller cone for drill bit having improved resistance to fatigue cracking  
A roller cone for a drill bit is disclosed which includes a cone body having a plurality of sockets. An interior portion of at least one of the sockets is treated on an interior surface of the...
6568491 Method for applying hardfacing material to a steel bodied bit and bit formed by such method  
A graphite or silicate plug is coated with a refractory metal and positioned in the cutter pocket of a steel bodied bit as molten hardfacing material is applied to the bit surface under high...
6568490 Method and apparatus for fabricating rotary cone drill bits  
A method for manufacturing drill bits in segments, using a single key which is nowhere concave in its axial profile to position all three segments together for welding; and drill bits so made.
6564884 Wear protection on a rock bit  
Using inserts which are welded in place allows the use of hardfacing in the immediate vicinity of the inserts. Areas of high wear, such as cutting structures and gage areas, can use a combination...
6543312 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations  
A drill bit for use in drilling operations in a wellbore, the drill bit having a bit body including a plurality of bit legs, each supporting a rolling cone cutter; a coupling member formed at an...
6536305 Cutting plate and method of pressing a cutting plate  
The cutting plate for a drill bit is press-formed from a powdery starting material. In the process, the cutting plate is arranged horizontally in the press die and the relative movement of top...
6533049 Mining drill steels and methods of making the same  
To eliminate or reduce the possibility of fracture in drill steels used in the roof bolting operations in mines the square or hexagonal surfaces of such drill steels or the elements such as...
6530441 Cutting element geometry for roller cone drill bit  
A roller cone drill bit for drilling earth formations is disclosed. The bit includes a bit body and a plurality of roller cones attached to the bit body and able to rotate with respect to the bit...
6454030 Drill bits and other articles of manufacture including a layer-manufactured shell integrally secured to a cast structure and methods of fabricating same  
A rotary-type earth-boring drill bit including a layer-manufactured, substantially hollow bit crown and an integral bit interior and bit gage. The bit interior and bit gage may be formed of a...
6450271 Surface modifications for rotary drill bits  
A rotary-type drill bit for drilling subterranean formations having areas or components having surfaces exhibiting a relatively low adhesion, preferably nonwater-wettable, surface over at least a...
6446740 Cutting element with improved polycrystalline material toughness and method for making same  
A cutting element having a cutting table made from sheet segments of commingled ultra hard material and binder. Each segment may be made from a finer or a coarser grade of ultra hard material or...
6435058 Rotary drill bit design method  
A method for use in designing rotary drill bits comprises determining locations in which cutters are to be provided, determining likely wear rates for cutters positioned at those locations, and...
6427792 Active gauge cutting structure for earth boring drill bits  
The present invention is a drag-type drill bit for drilling a borehole in the earth. The bit is designed to rotate about a central axis of rotation and has a bit body having a leading face, an end...
6415687 Rotary cone drill bit with machined cutting structure and method  
A rotary cone drill bit is provided with at least one cutter cone assembly having a machined cutting structure which will maintain an effective cutting profile despite abrasion, erosion and/or wear...
6412577 Roller-cone bits, systems, drilling methods, and design methods with optimization of tooth orientation  
A novel and improved roller cone drill bit and method of design are disclosed. A roller cone drill bit for drilling through subterranean formations having an upper connection for attachment to a...
6401839 Roller cone bits, methods, and systems with anti-tracking variation in tooth orientation  
A roller cone drill bit in which the orientations of the teeth are varied within a single row, and/or between the heel row of one cone and the heel row of another cone, to prevent tracking.
6374932 Heat management drilling system and method  
The invention is embodied in an earth boring tool comprising a bit body having a rotatable working head portion with a cutter element having a wear table of superhard material bonded to a...
6374704 Steel-tooth bit with improved toughness  
An earth boring bit is shown having a bit body and at least one cutter rotatably secured to the bit body. The cutter has a plurality of teeth formed integrally thereon and arranged in...
6367567 Lockable drill steel and chuck assembly  
A drill steel-chuck assembly which includes a drill steel which has a plurality of faces and opposite ends. The drill steel has one portion adjacent one of the opposite ends thereof and a mediate...
6353771 Rapid manufacturing of molds for forming drill bits  
A mold is formed for an building earth boring bit by designing the bit geometry in three dimensions using a computer aided design (CAD) system and then feeding the geometry data of the design to a...
6272753 Multi-layer, multi-grade multiple cutting surface PDC cutter  
An improved polycrystalline diamond composite ("PDC") cutter with secondary PDC cutting surfaces in addition to a primary PDC cutting surface is formed comprising of at least two wafers of cemented...
6220117 Methods of high temperature infiltration of drill bits and infiltrating binder  
A method of manufacturing a bit body, other drilling-related component, or other article of manufacture, including fabricating a particulate-based matrix and infiltrating the particulate-based...
6209420 Method of manufacturing bits, bit components and other articles of manufacture  
A method of fabricating rotary-type drill bits, drilling-related structures, and other articles of manufacture. The method includes fabricating a machinable matrix, machining the matrix, and...
6206115 Steel tooth bit with extra-thick hardfacing  
An earth-boring bit has a bit body with at least one earth disintegrating cutter mounted on it. The cutter is generally conically shaped and rotatably secured to the body. The cutter has a...
6206062 Shank-type cutter of a hard material  
In a shaft-type cutter body of hard material including a shaft for mounting the cutter in a chuck and a head including cutting areas with cutting edges disposed around the circumference of the...
6199451 Tool having a tungsten carbide insert  
An excavating tool has a tungsten carbide insert which is more wear resistant and not subject to breakage because of bring too brittle. The insert has a semispherical tip, a divergent midsection...
6193001 Method for forming a non-uniform interface adjacent ultra hard material  
A non-uniform interface is formed between a polycrystalline ultra hard material layer and a cemented tungsten carbide substrate, or a polycrystalline ultra hard material layer and a transition...
6148937 PDC cutter element having improved substrate configuration  
A supporting substrate for supporting a diamond layer on a cutting element is disclosed which has an irregular surface defining the interface between the substrate and the diamond layer. The...
Matches 1 - 50 out of 241 1 2 3 4 5 >