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Match Document Document Title
7398840 Matrix drill bits and method of manufacture  
A matrix drill bit and method of manufacturing a matrix bit body from a composite of matrix materials is disclosed. Two or more different types of matrix materials may be used to form a composite...
7377341 Thermally stable ultra-hard material compact construction  
Thermally stable ultra-hard compact constructions of this invention comprise an ultra-hard material body that includes a thermally stable region positioned adjacent a surface of the body. The...
7377340 Drill bit cutting elements with selectively positioned wear resistant surface  
Drill bits comprise a plurality of steel cutting teeth each having a crest positioned at a tip portion of each tooth, a first flank surface extending from the crest to the cone, a second flank...
7377332 Multiple inserts of different geometry in a single row of a bit  
A method for designing a roller cone drill bit having a plurality of cutting elements in a row. The method includes defining a pitch pattern for the plurality of cutting elements such that a first...
7373997 Layered hardfacing, durable hardfacing for drill bits  
A drill bit having a bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade, at least one cutter disposed in the at least one cutter pocket,...
7368079 Method for forming ultra hard sintered compacts using metallic peripheral structures in the sintering cell  
A method for forming an ultra hard material layer is provided. The method includes disposing a metallic liner inside the periphery of a refractory metal enclosure, introducing ultra hard material...
7350601 Cutting elements formed from ultra hard materials having an enhanced construction  
Cutting elements of this invention include an ultra hard body joined with a metallic substrate. The body includes an uppermost layer comprising a plurality of bonded ultra hard crystals and...
7350600 Shirttails for reducing damaging effects of cuttings  
An earth-boring bit has a bit body that includes head sections, each having depending bit legs with a circumferentially extending outer surface, a leading side, and a trailing side. A bearing shaft...
7350599 Impregnated diamond cutting structures  
An insert for a drill bit that includes diamond particles disposed in a matrix material, wherein the diamond particles have a contiguity of 15% or less is disclosed. A method of forming a...
7343990 Rotary rock bit with hardfacing to reduce cone erosion  
An earth-boring bit has a body with three bit legs. A cone is rotatably mounted to each of the bit legs. Each of the cones has an outer row and an inner row of teeth machined on it. Each of the...
7341119 Hydro-lifter rock bit with PDC inserts  
A rolling cone rock bit includes a plurality of PDC or other cutters mounted to the leg of the drill bit and positioned to cut the corner of the bottomhole. The plurality of cutters may be the...
7334652 Roller cone drill bits with enhanced cutting elements and cutting structures  
Roller cone drill bits are provided with cutting elements and cutting structures optimized for efficient drilling of soft and medium formations interspersed with hard stringers. The cutting...
7303030 Barrier coated granules for improved hardfacing material  
A hardfacing composition for a drill bit includes a carbide phase made from carbide particles having a barrier coating disposed thereon, and binder alloy. Also, a drill bit includes a steel bit...
7267186 Magnetic face seal for rock drill bit bearings  
A seal assembly for an earth boring bit uses a magnet to provide a desired contact force. The seal is located between a rotating cone and a stationary bearing pin of the drill bit. The seal has a...
7258177 Fracture and wear resistant compounds and rock bits  
An insert for a rock bit that includes tungsten carbide particles, and a cobalt binder disposed around the particles, wherein a grain size of the tungsten carbide particles and a content of the...
7250069 High-strength, high-toughness matrix bit bodies  
A new composition for forming a matrix body which includes spherical sintered tungsten carbide and an infiltration binder including one or more metals or alloys is disclosed. In some embodiments,...
7240746 Bit gage hardfacing  
An earth boring bit has at least one rotatable cone with a gage surface that engages a sidewall of a wellbore as the bit rotates. The gage surface has hardfacing bars spaced circumferentially apart...
7195086 Anti-tracking earth boring bit with selected varied pitch for overbreak optimization and vibration reduction  
An earth boring drill bit is constructed having rotatable cutter for forming a borehole in earth. At least one circumferential row of cutting elements is optimized to create overbreak of rock and...
7195078 Multiple inserts of different geometry in a single row of a bit  
A method for designing a roller cone drill bit having a plurality of cutting elements in a row. The method includes defining a pitch pattern for the plurality of cutting elements such that a first...
7182162 Shirttails for reducing damaging effects of cuttings  
An earth-boring bit has a bit body that includes head sections, each having depending bit legs with a circumferentially extending outer surface, a leading side, and a trailing side. A bearing shaft...
7124842 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...
7100712 Method for hardfacing roller cone drill bit legs  
A roller cone drill bit includes a bit body adapted to be coupled to a drill string, at ne leg depending from the bit body, and a bearing journal on the at least one leg, wherein least one leg...
7086488 Cutting element having enhanced cutting geometry  
A drill bit that includes a bit body, at least one roller cone attached to the bit body and able to rotate with respect to the bit body, a plurality of cutting elements disposed on the at least one...
7040424 Drill bit and cutter having insert clusters and method of manufacture  
Disclosed is a rolling cone cutter and drill bit employing multiple inserts retained as a cluster in an aperture in the cone cutter. Apertures in which the insert clusters are retained are...
7036614 Fracture and wear resistant compounds and rock bits  
An insert for a rock bit that includes tungsten carbide particles, and a cobalt binder disposed around the particles, wherein a grain size of the tungsten carbide particles and a content of the...
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...
7017677 Coarse carbide substrate cutting elements and method of forming the same  
Cutting elements having coarse grain substrates and ultra hard material layers are provided. The substrates are formed from coarse grain size particles of tungsten carbide. A method of forming such...
7011170 Increased projection for compacts of a rolling cone drill bit  
An earth boring bit has rolling cones rotatably mounted to the bit legs. Each cone has conical bands extending around the exterior. Holes are formed in each of the bands. Compacts are press-fitted...
7004267 Drill bit cone protector  
A drill bit for use in earth-boring operations includes a threaded upper section removably connectable to a power source, and a shank section connected thereto and having a centrally disposed...
6988569 Cutting element orientation or geometry for improved drill bits  
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...
6955233 Roller cone drill bit legs  
A method is disclosed for applying hardfacing to a shirttail portion of a roller cone drill bit, including masking around the shirttail portion of the bit and operating a high pressure/high...
6951578 Polycrystalline diamond materials formed from coarse-sized diamond grains  
PCD materials of this invention comprise diamond crystals that are bonded together with a catalyst/binder material. The PCD material is prepared by combining diamond grains with a catalyst/binder...
6942045 Drilling with mixed tooth types  
A rotary-cutter Earth-penetrating bit in which a given track of bottom hole is attacked by inserts of two different types, e.g. chisel-shaped and pointed, wider and narrower, higher and shorter,...
6923276 Streamlined mill-toothed cone for earth boring bit  
An earth-boring bit has a bit body, at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body, and a cutter mounted for rotation on the bearing shaft. The cutter...
6915866 Polycrystalline diamond with improved abrasion resistance  
A cutting element and bit incorporating the cutting element is provided, as well as a method for forming the same. The cutting element includes an ultra hard material layer including chromium and...
6827161 Roller cone drill bit having non-axisymmetric cutting elements oriented to optimize drilling performance  
A method for optimizing drilling performance of a roller cone drill bit is disclosed. The method includes simulating drilling with the bit in a selected earth formation to determine at least one...
6823951 Arcuate-shaped inserts for drill bits  
Disclosed are a variety of arcuate-shaped inserts for drill bits, and in particular, for placement in rolling cone cutters of drill bits. The arcuate inserts include 360 degree or ring-shaped...
6808031 Drill bit having large diameter PDC cutters  
A variety of large diameter PDC cutters for use in drill bits are disclosed. Specifically, various PDC cutters having a diameter between 19.0 mm and 25.0 mm are disclosed. The various PDC cutters...
6782958 Hardfacing for milled tooth drill bits  
In one embodiment, a hardfacing composition for a drill bit, including a carbide phase including from about 50% to about 80% by weight of the hardfacing composition of a combination of 80 to 200...
6772849 Protective overlay coating for PDC drill bits  
In one embodiment, a method of increasing a durability of a drill bit having a bit body with at least one blade disposed thereon, at least one cutter pocket disposed on the blade, and at least one...
6766870 Mechanically shaped hardfacing cutting/wear structures  
A hardfacing material is applied to cutting elements formed on the surface of cutters of an earth-boring bit. The hardfacing material forms the outer surface of the teeth, and also substantially...
6725952 Bowed crests for milled tooth bits  
A drill bit has a bit body and at least one roller cone rotatably mounted on the bit body. The cone has a plurality of milled teeth at selected locations on the cone. At least one of the milled...
6688410 Hydro-lifter rock bit with PDC inserts  
A novel rolling cone rock bit includes a plurality of PDC or other cutters mounted to the leg of the drill bit and positioned to cut the troublesome corner of the bottomhole. The plurality of...
6659206 Hardfacing composition for rock bits  
A hardfacing composition for a drill bit is disclosed which includes a carbide phase made from about 80% to less than 100% by weight of a combination of sintered carbide pellets and crushed cast...
6655480 Cutting insert for percussion drill bit  
A cutting insert for a gauge row of a percussion drill bit includes a generally cylindrical mounting portion extending along a central axis and a cutting head extending from the mounting portion....
6655478 Fracture and wear resistant rock bits  
A fracture and wear resistant rock bit is disclosed, which includes a bit body, and at least one roller cone disposed on the bit body adapted such that at least one row of cutting elements disposed...
6651757 Toughness optimized insert for rock and hammer bits  
An insert for a drill bit is disclosed which includes an exposed surface having a contact portion adapted to periodically contact earthen formation. The contact portion includes a polycrystalline...
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...
6640913 Drill bit with canted gage insert  
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...
6615936 Method for applying hardfacing to a substrate and its application to construction of milled tooth drill bits  
A method for applying hardfacing to teeth on a drill bit is disclosed. The method includes applying the hardfacing to at least one of the teeth so as to have a thickness selected to correspond to a...
Matches 1 - 50 out of 356 1 2 3 4 5 6 7 8 >