Matches 51 - 100 out of 310 < 1 2 3 4 5 6 7 >
Match Document Document Title
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...
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...
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...
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...
6607047 Earth-boring bit with wear-resistant shirttail  
An earth-boring bit has a bit body that is threaded at one end for connection into a drill string. At least one cantilevered bearing shaft depends inwardly and downwardly from the bit body. A...
6604588 Gage trimmers and bit incorporating the same  
A gage trimmer and a bit incorporating such a gage trimmer are provided. The gage trimmer has an ultra hard material layer having a circumferential surface including a cylindrical portion and a...
6604587 Flat profile cutting structure for roller cone drill bits  
A drill bit including a roller cone and a plurality of cutting elements. The roller cone is affixed to a bit body and is arranged circumferentially about a bit axis of rotation. In one aspect, the...
6601661 Secondary cutting structure  
A three cone roller bit with rolling cone cutters that are provided with both primary and secondary cutting elements. The primary cutting elements extend outwardly from lands on the outer surface...
6601662 Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength  
Disclosed is a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength. These elements are formed with a binder-catalyzing material in...
6598690 Dual dynamic rotary seal  
The invention is a roller cone drill bit including a seal adapted to seal between the bit body and a roller cone on the drill bit. The seal includes a seal body formed from a material that is...
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...
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...
6510909 Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty  
A rolling cone bit includes at least one cone cutter having a gage row of cutter elements and a first inner row of near but off-gage cutter elements that are positioned so as to divide the sidewall...
6499547 Multiple grade carbide for diamond capped insert  
An insert for a rolling cone earth-boring bit has a cylindrical base that interferingly presses into a mating hole formed in a cone of the bit. The insert has a convex end that extends from the...
6484825 Cutting structure for earth boring drill bits  
A drill bit for drilling a borehole having a bit body with an axis of rotation, a leading face, and a plurality of blades upstanding from the leading face. At least one of the blades terminates in...
6478887 Boronized wear-resistant materials and methods thereof  
A boronized wear-resistant material that includes a boron-containing composition is disclosed. The boron-containing composition includes tungsten carbide and a compound represented by the formula W...
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...
6435287 Sharp gage for mill tooth rock bits  
A design for a gage tooth of the milled tooth variety is provided. The gage facing surface of each tooth is shaped so that only a narrow surface of each tooth contacts the borehole wall. Adjacent...
6414258 Base carrier for tracklaying vehicle and hard facing method  
The objects of the invention are: a weld overlay having stable quality is provided; cracks which have been created on a weld overlay during engagement of a part with its mating member are prevented...
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.
6371225 Drill bit and surface treatment for tungsten carbide insert  
A drill bit insert has a cylindrical barrel, a bevel on one end, an interface therebetween, and a cutting tip opposite the bevel. The bevel and interface contact the entrance to a hole in the drill...
6360832 Hardfacing with multiple grade layers  
An earth-boring bit has hardfacing that has multiple grades and an overlapped portion. One of the layers is of a different grade than the other so as to provide more wear resistance. The other...
6347676 Tooth type drill bit with secondary cutting elements and stress reducing tooth geometry  
Disclosed is a tooth type rolling cutter earth boring drill bit with secondary cutting elements on the tooth surfaces. The secondary cutting elements provide additional, relatively sharp edges that...
6287360 High-strength matrix body  
A new composition for making an improved high-strength matrix body and methods of making the matrix body are disclosed. The new composition includes large-grain carburized tungsten carbide, an...
6253862 Earth-boring bit with cutter spear point hardfacing  
An earth-boring bit has rolling cutters, each attached to a bit leg depending from a bit body. Each of the cutters has hardfaced, milled teeth. A spear point is located on one of the cutters. The...
6248149 Hardfacing composition for earth-boring bits using macrocrystalline tungsten carbide and spherical cast carbide  
A hardfacing composition for an earth-boring bit has a quantity macrocrystalline tungsten carbide particles and a quantity of spherical cast tungsten carbide pellets. The particles and pellets are...
6241035 Superhard material enhanced inserts for earth-boring bits  
Superhard material enhanced inserts and methods of making the same have been disclosed. The enhanced insert includes a body portion adapted for attachment to the earth-boring bit and a top portion...
6216805 Dual grade carbide substrate for earth-boring drill bit cutting elements, drill bits so equipped, and methods  
A cutting element substrate for use with an earth-boring drill bit. The substrate includes a base, or outer shell, with a cavity opening to an end thereof. The base is fabricated from an...
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...
6196338 Hardfacing rock bit cones for erosion protection  
A method of manufacturing a rolling cone with hard-facing coating for use in drilling boreholes is disclosed. The method includes a step of depositing a layer of hardfacing material by an arc...
6186250 Sharp gage for mill tooth rockbits  
A design for a gage tooth of the milled tooth variety is provided. The gage facing surface of each tooth is shaped so that only a narrow surface of each tooth contacts the borehole wall. Adjacent...
6173797 Rotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability  
A rotary drill bit suitable for directional drilling. The bit includes a bit body from which extend legs carrying rotatable cutters. The body carries primary gage pads, above which secondary gage...
6170583 Inserts and compacts having coated or encrusted cubic boron nitride particles  
An insert is provided for a rock bit for drilling bore holes in the ground and other downhole tools. The cutting portion of the inserts consist of encrusted cubic boron nitride pellets, tungsten...
6135218 Fixed cutter drill bits with thin, integrally formed wear and erosion resistant surfaces  
A fixed-cutter drill bit for boring through earth has a body made predominately of high strength steel with thin erosion and abrasion resistant surfaces integrally formed in the steel in areas...
6116357 Rock drill bit with back-reaming protection  
A drill bit for boring a bore hole in an earthen formation comprises: a bit body having a pin end, a cutting end and a longitudinal bit axis and including at least two legs extending from the...
6116359 Tri-cone kerf gage  
An earth-boring bit has a bit body with at least one bearing shaft depending inwardly and downwardly therefrom. A cutter is mounted for rotation on each bearing shaft and has a cutter shell surface...
6105694 Diamond enhanced insert for rolling cutter bit  
An earth-boring bit has a bit body and a cantilevered bearing shaft depending from the bit body. The cutter is mounted for rotation on the bearing shaft. Cutting elements are secured within holes...
Matches 51 - 100 out of 310 < 1 2 3 4 5 6 7 >