Matches 101 - 150 out of 310 < 1 2 3 4 5 6 7 >
Match Document Document Title
6102140 Inserts and compacts having coated or encrusted diamond particles  
The improved insert for a ground engaging tool, with a plurality of sockets for receiving a respective insert comprises a body having first and second portions and first and second zones. The first...
6065552 Cutting elements with binderless carbide layer  
An earth-boring bit has cutting elements inserted within holes in the cutter support. The cutting element has a body of a fracture-tough material, preferably tungsten carbide which contains a...
6053263 Cutting element tip configuration for an earth-boring bit  
An earth-boring bit has a bit body which connects to a drill string. Three cutters are rotatably secured to a bearing shaft of the bit and a large number of chisel-like cutting elements are secured...
6029759 Hardfacing on steel tooth cutter element  
A steel tooth particularly suited for use in a rolling cone bit includes a parent metal core having an inner gage facing surface, leading and trailing edges, a root region adjacent to the cone and...
5992546 Rotary earth strata penetrating tool with a cermet insert having a co-ni-fe-binder  
A rotary tool that includes an elongate tool body and a hard insert affixed to the tool body is disclosed. The hard insert includes a WC-cermet including tungsten carbide and about 5 wt. % to 19...
5988302 Hardmetal facing for earth boring drill bit  
A steel tooth rolling cutter earth boring drill bit includes a bit body with a threaded upper end for attachment to the end of a drill string, and a lower end including three legs extending...
5988303 Gauge face inlay for bit hardfacing  
Steel bit bodies are manufactured in a production process that employs polystyrene patterns in a lost foam casting process. The patterns are machined to permit the formation of complex shapes that...
5979575 Hybrid rock bit  
An earth-boring bit has a rotating cutter of a hybrid design. The bit has a bit body and a bearing shaft which is cantilevered downwardly and inwardly from the bit body. The cutter is mounted for...
5975223 Rock drill bit and method for hardening a rock drill bit  
The present invention relates to a rock drill bit for rotary crushing machining of rock. The rock drill bit includes legs (10), each of which carry a journal (11) provided with bearing surfaces...
5967245 Rolling cone bit having gage and nestled gage cutter elements having enhancements in materials and geometry to optimize borehole corner cutting duty  
A rolling cone bit includes a cone cutter having a gage row and an adjacent nestled gage row of cutter elements that are positioned on gage so as to divide or share the borehole corner cutting...
5967248 Rock bit hardmetal overlay and process of manufacture  
Methods of forming a new wear and abrasion overlay formed with the steel surfaces of components for earth boring bits, and the components formed by the methods are disclosed. The overlay comprises...
5954147 Earth boring bits with nanocrystalline diamond enhanced elements  
An earth boring bit is shown of the type used to drill subterranean formations. The bit body has an upper extent which is threaded for connection in a drill string extending to the earth's surface....
5950742 Methods and related equipment for rotary drilling  
Methods and related equipment for drilling a wellbore in subterranean formations whereby a drill bit is attached to one end of a first conduit string, such as a casing string which is not usually...
5944128 Matrix hard facing by lost wax process  
A drill bit comprises a main body part having a shank for connection to a drill string, an end face, an internal passage for supplying drilling fluid to the end face, a number of blades extending...
5944127 Hardfacing material for rock bits  
A hardfacing material for shirttail and gage surfaces of a rock bit cone and a gage row of rock bit teeth comprises steel in the range of from 20 to 40 percent by weight, and tungsten carbide...
5921330 Rock bit with wear-and fracture-resistant hardfacing  
An improved hardfacing for teeth and other surfaces of milled tooth rock bits comprises a hard phase of carbide particles embedded in a toughened steel matrix containing no more than 10 percent by...
5915486 Cutter element adapted to withstand tensile stress  
A cutter element having a substantially flat wear face and leading compression and trailing tension zones, wherein the leading compression zone is sharper than the trailing tension zone. Sharpness...
5890772 Grinding machine for removing markings from paved surfaces and grinder for the same  
A grinding machine to remove markings such as painted lines from a paved surface includes a wheeled carriage to be moved over the paved surface. A grinder is positioned beneath the carriage to...
5880382 Double cemented carbide composites  
Double cemented carbide composites comprise a plurality of first regions and a second ductile phase that separate the first regions from each other. Each first region comprises a composite of...
5868213 Steel tooth cutter element with gage facing knee  
A steel tooth, particularly suited for use in a rolling cone bit, includes a root region, a cutting tip spaced from the root region and a gage facing surface therebetween. The gage facing surface...
5855247 Rolling-cutter earth-boring bit having predominantly super-hard cutting elements  
An earth-boring bit has a bit body. At least one cantilevered bearing shaft depends inwardly and downwardly from the bit body and a cutter is mounted for rotation on the bearing shaft. The cutter...
5842531 Rotary rock bit with infiltrated bearings  
A rotary rock bit is formed as a rock bit body, a bearing shaft supported by the rock bit body, a rotary cutter adapted to be rotatably mounted on the bearing shaft, and at least one bearing that...
5833020 Rolling cone bit with enhancements in cutter element placement and materials to optimize borehole corner cutting duty  
A rolling cone bit includes a cone cutter having a pair of adjacent rows of cutter elements that are positioned so as to divide the sidewall and bottom hole cutting duty. The wear resistance,...
5819861 Earth-boring bit with improved cutting structure  
An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a cutter shell surface including a gage surface and a heel surface. A plurality of...
5799741 Method of cutting and a cutting rotative bit  
A cutting, self-rotating, and self-sharpening tool has a rotatable cutting element, generally circular, which is mounted and displaced so that cutting element has an attack angle between 90° and...
5791422 Rock bit with hardfacing material incorporating spherical cast carbide particles  
An improved hardfacing for teeth and other surfaces of milled tooth rock bits includes steel in the range of from 20 to 50 percent by weight, and filler in the range of from 50 to 80 percent by...
5778994 Claw tooth rotary bit  
A claw tooth rotary bit having teeth that are constructed from a hard material that is combined with a softer material so that the teeth wear unevenly as the bit is used to bore through an earth...
5755297 Rotary cone drill bit with integral stabilizers  
A rotary cone drill bit for forming a borehole having a bit body with an upper end portion adapted for connection to a drill string. A number of support arms extend from the bit body. Each support...
5752573 Earth-boring bit having shear-cutting elements  
An earth-boring bit has a bit body. At least one cantilevered bearing shaft depends inwardly and downwardly from the bit body and a cutter is mounted for rotation on the bearing shaft. The cutter...
5746281 Method for mounting hard metal buttons in a drill bit  
A method for mounting hard metal buttons in a drill bit and a drill bit. In the method, a hole (4) is worked into a drill (1) before the drill bit is tempered. Subsequently, a hard metal button...
5740872 Hardfacing material for rolling cutter drill bits  
A material for applying hardfacings to the teeth of steel tooth rolling cutter drill bits comprises a mixture of refractory metal carbide, such as tungsten carbide, cobalt and metallic matrix...
5732783 In or relating to rotary drill bits  
A drill bit comprises a main body part having a shank for connection to a drill string, an end face, an internal passage for supplying drilling fluid to the end face, a number of blades extending...
5722497 Roller cone gage surface cutting elements with multiple ultra hard cutting surfaces  
A gage surface cutting element (22, 30, 50, 70, 100, 120) for a cutter (20) in a roller cone drill bit (10) has a generally cylindrical body (32, 52, 72, 102, 122) formed of a hard and...
5715899 Hard facing material for rock bits  
An improved hard facing for teeth and other surfaces of milled tooth rock bits comprises steel in the range of from 18 to 32 percent by weight, and filler in the range of from 68 to 82 percent by...
5709278 Rotary cone drill bit with contoured inserts and compacts  
A rotary cone drill bit (20 and 120)is provided with inserts (70 and 90) and compacts (50 and 150) having contoured cutting portions (66, 166, 72 and 92). The rotary cone drill bit (22 and 122)...
5697462 Earth-boring bit having improved cutting structure  
A bit body has at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body. A cutter is mounted for rotation on the bearing shaft and includes a plurality of cutting...
5695018 Earth-boring bit with negative offset and inverted gage cutting elements  
An earth-boring bit has a bit body and at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body. A cutter is mounted for rotation on the bearing shaft and...
5671817 Drill bit with dual reaming rows  
A rolling cutter drill bit has multiple rows of gage reaming inserts mounted in the gage face of the cutters. A first interlocking row of gage reaming inserts is positioned on the gage face of a...
5662183 High strength matrix material for PDC drag bits  
A PDC drag bit body is disclosed which utilizes a high-strength infiltration binder having a composition comprising a nickel, cobalt, or iron base alloy. The infiltration molding process is...
5653299 Hardmetal facing for rolling cutter drill bit  
A steel tooth rolling cutter earth boring drill bit comprises a bit body with a threaded upper end for attachment to the end of a drill string, and a lower end comprising three legs extending...
5636700 Roller cone rock bit having improved cutter gauge face surface compacts and a method of construction  
A roller cone rock bit (10) is provided that has improved cutter cone gauge face surface compacts. The roller cone rock bit (10) includes a bit body (12) having at least one downwardly extending...
5553681 Rotary cone drill bit with angled ramps  
A rotary cone drill bit for forming a borehole having a bit body with an upper end portion adapted for connection to a drill string. A number of support arms extend from the bit body. Each support...
5535838 High performance overlay for rock drilling bits  
A method to apply a high performance overlay to a metal substrate of a rock bit to render the substrate surfaces of the rock bit more resistant to erosion, corrosion and substrate cracking while...
5509490 EMF sacrificial anode sub and method to deter bit balling  
A sacrificial anode sub and method are disclosed which provide a lower voltage at the proximately located bit than at the sacrificial anode disposed on sub to thereby deter bit balling. An...
5492186 Steel tooth bit with a bi-metallic gage hardfacing  
An earth boring bit rotatable cutter having a first hardfacing composition of carbide particles selected from the class of cast and macrocrystalline tungsten carbide dispersed in a steel matrix...
5464068 Drill bits  
A drill bit comprises a working end having a slot formed therein and an unbacked diamond insert located in the slot and bonded to the working end, typically by brazing. The diamond insert will...
5456327 O-ring seal for rock bit bearings  
An improved O-ring seal for rock bit bearings comprises a body formed from a resilient elastomeric composition and a modified surface comprising a surface enhancing material integral with the body....
5445231 Earth-burning bit having an improved hard-faced tooth structure  
An earth-boring bit has a bit body, at least one cutter rotatably secured to the bit body and including a plurality of teeth formed integrally with the cutter and arranged in circumferential rows...
5421424 Bowed out chisel insert for rock bits  
A chisel type insert is disclosed having a contoured surface in which the vertical lines located on the surface are bowed outwardly in a convex manner thereby eliminating blend radii from the...
5415244 Conical inserts for rolling cone rock bits  
A conical insert is disclosed having a cutting tip which includes a spherically shaped apex and a substantially conical surface therebelow. The trailing side of the cutting tip is convex as seen in...
Matches 101 - 150 out of 310 < 1 2 3 4 5 6 7 >