Matches 1 - 50 out of 191 1 2 3 4 >
Match Document Document Title
7392865 Randomly-oriented composite constructions  
Composite constructions comprise a plurality of granules that are arranged together in a randomly-oriented manner. The granules each comprise an ordered arrangement of a first material phase and a...
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,...
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...
7243744 Randomly-oriented composite constructions  
Composite constructions comprise a plurality of granules that are arranged together in a randomly-oriented manner. The granules each comprise an ordered arrangement of a first material phase and a...
7048080 Roller cone bits with wear and fracture resistant surface  
Roller cone bits include a steel bit body having a leg extending therefrom. A steel cone is disposed on the leg and includes steel cutting elements projecting outwardly therefrom. One of the...
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...
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.
6510906 Impregnated bit with PDC cutters in cone area  
A drill bit employing a plurality of discrete, post-like diamond grit impregnated cutting structures extending upwardly from abrasive particulate-impregnated blades defining a plurality of fluid...
6470558 Method for facing a substrate  
A method of facing a substrate comprises the steps of first welding a body of a hard facing material to the substrate and then filling a space around the body with a molten metal. The method can be...
6392190 Automated hardfacing system  
An automated hardfacing system useful for hardfacing roller cones is disclosed. The automated system includes a robot with an arm, a positioner, and a controller which co-ordinates the alignment of...
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...
6109375 Method and apparatus for fabricating rotary cone drill bits  
A method and apparatus are provided for use in fabricating rotary cone drill bits from multiple drill bit segments. Each drill bit segment (40) preferably includes a first portion (50) with mating...
5839525 Directional drill bit  
A roller cone or drag-type drill bit for use in drilling subsurface formations, especially useful for directional drilling, has a bit body with a shank portion for connection to a drill string, and...
5791423 Earth-boring bit having an improved hard-faced tooth structure  
An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter includes a plurality of teeth formed integrally with the cutter and arranged in...
5755299 Hardfacing with coated diamond particles  
Hardfacing to protect wear surfaces of drill bits and other downhole tools having coated diamond particles dispersed within and bonded to a metallic matrix deposit. The coating on the diamond...
5641029 Rotary cone drill bit modular arm  
A drill bit (20) for a modular arm (70) is provided. The modular arm (70) includes an inside surface (76) having first (144) and second (146) angled surfaces whose lower portions form an inwardly...
5624002 Rotary drill bit  
A rotary cone drill bit having a one-piece bit body with a lower portion having a convex exterior surface and an upper portion adapted for connection to a drill string. The drill bit will generally...
5579856 Gage surface and method for milled tooth cutting structure  
A milled tooth (22) is provided having a back face (38), including an upper back face surface (58) and a lower back face surface (60). A tip or top surface (36) is provided below the upper back...
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...
5524510 Method and apparatus for manufacturing a rock bit leg  
A method of manufacturing a rock bit leg from a rough bit leg forging is disclosed whereby multiple machining operations are performed by a six-axis CNC machining center. Three dimensional datum...
5348770 Method of forming an uninterrupted refractory coating on a downhole drill bit cone  
Drill bits having projecting inserts are completely coated with refractory material including on the edge margins about the inserts by thermally spraying with refractory particles whose particulate...
5305840 Rock bit with cobalt alloy cemented tungsten carbide inserts  
A rock bit employs cemented tungsten carbide inserts for engaging a rock formation for drilling oil wells or the like. The cemented tungsten carbide inserts have as a binder phase a cobalt base...
5040623 Controlled true geometry rock bit with one piece body  
A rotary cone rock bit featuring a reproducible geometry and a one piece body is disclosed. Individual journal members, supporting rotary cutting cones, have upwardly extending structural shanks...
4941711 Cemented carbide tip  
A cemented carbide tip for a cutter bit is rotationally symmetric about its longitudinal axis and has a socket in its rear end for brazing to a steel protrusion on a steel tool shank. The tip...
4814234 Surface protection method and article formed thereby  
The disclosed invention describes a method for cladding surfaces of an earth boring apparatus, or the like, with a hardfacing material having an entrained, or encapsulated, heavy metal refractory...
4726432 Differentially hardfaced rock bit  
A method for manufacturing an earth boring drill bit and bit produced thereby are shown. The bit has rotatable cutters with a plurality of milled teeth, each of the teeth having opposing flanks. A...
4711143 Rock bit assembly method  
In a method of assembling a roller cone type rock bit, on a body having a tool joint adjacent one end and at least one leg portion adjacent the other end, the leg portion is provided with a...
4699227 Method of forming cutting structures for rotary drill bits  
A method of forming a cutting structure for a rotary drill bit comprises brazing a thermally stable polycrystalline diamond cutting element to a carrier, the carrier being formed of a material such...
4617446 Welding fixture for rotary cone rock bits with belleville seals  
A welding fixture for metallurgically bonding a belleville seal to a journal bearing of a rotary cone rock bit segment is disclosed. The fixture includes a rotary table and structure to rotatively...
4593776 Rock bits having metallurgically bonded cutter inserts  
A cladding process is disclosed wherein hard carbide cutter inserts, as well as polycrystalline diamond composites, are metallurgically bonded into an exterior core of a rock bit cone or a drag bit...
4382477 Rotary drill bits  
In a rotary drilling bit having preform cutting elements, a partial or total structural discontinuity is disposed between the elements and the underlying structure or within the underlying...
4369849 Large diameter oil well drilling bit  
The present invention discloses a large diameter oil well drilling bit which utilizes a unique cast body upon which are secured a plurality of cutting assemblies comprising a leg, a bearing journal...
4258807 Method for making rock bits  
Segments of a rock bit are secured together by electron-beam welding. The segments are slightly spaced apart prior to welding by a thin shim of alloying metal such as titanium which improves...
4256194 Rotary drill bit having a solid forged, unitary body  
A rotary drill bit for use on a rotating drill string includes a solid forged unitary main body having a plurality of downwardly facing hemi-cylindrical body surfaces. A plurality of cutter bases...
4243727 Surface smoothed tool joint hardfacing  
A tool joint hardfacing containing sintered tungsten carbide granules embedded in an alloy steel matrix, with the surface substantially free of protruding granules to decrease casing wear during...
4229638 Unitized rotary rock bit  
A rotary rock bit is formed from at least two individual segments. The individual segments are positioned together and aligned in the proper position for the final assembled bit. The seams between...
4225322 Composite compact components fabricated with high temperature brazing filler metal and method for making same  
A component comprised of a composite compact, preferably diamond, and a substrate bonded to the compact. A preferred embodiment of the component is a cutter for a drill bit. The compact is...
4158973 Rolling cutter drill bit  
A rolling cutter drill bit is disclosed which utilizes a main body having a threaded end for connection in a drill string, and a plurality of rolling cutter assemblies joined to the bottom of the...
4156123 Method for making rock bits  
Segments of a rock bit are secured together by electron-beam welding. The segments are slightly spaced apart prior to welding by a thin shim of alloying metal such as titanium which improves...
4145094 Rotary rock bit and method of making same  
A rotary rock bit is described having a plurality of legs extending downwardly from the main bit body. Each leg includes an annular bore extending through the lower extremity thereof. A separate...
T969007 Method for making rock bits  
a method of making a rock bit which is a welded assembly of legs each carrying a rotatable cutter. Electrochemical grinding is used for finish machining of mating surfaces of heat-treated bit legs,...
4054772 Positioning system for rock bit welding  
A positioning system is provided for clamping individual segments of a rock bit together in position for an assembled bit and aligning the seams between the segments with a beam of energy from a...
4045646 Positioning fixture for rock bit welding  
A positioning fixture is provided for clamping individual segments of a rock bit together in position for an assembled bit with an accurate gage diameter and aligning the seams between the segments...
4043411 Rotary rock bit with the bearing pin fused to the rock bit arm  
A rotary rock bit is constructed from at least one rock bit arm and a separate bearing pin. The rock bit arm includes a curved shirttail surface, a plane cutter receiving surface, and a mounting...
4007799 Raise drill with replaceable stem  
A raise type of earth boring drill in which the cutter assembly is detachably secured to the drive stem to permit replacement of the stem. The stem slidably engages a central opening in the cutter...
3987859 Unitized rotary rock bit  
A rotary rock bit is formed from at least two individual segments. The individual segments are positioned together and aligned in the proper position for the final assembled bit. The seams between...
3907191 Method of constructing a rotary rock bit  
A rotary rock bit is constructed from a multiplicity of individual segments. Each individual segment includes two parting faces and a gage cutting surface. The individual segments are positioned...
3858667 BIG HOLE CUTTER  
A big hole cutter such as are employed in connection with raise drilling machines and box hole drilling machines in which a support frame is provided for connection to the drill string of the...
3850256 ROCK BIT WITH ONE PIECE BODY AND DEPENDING ARMS  
A rotary rock bit is formed from a multiplicity of individual segments. At least one depending arm body is positioned in abutting relationship to a one piece bit body and welded thereto. A...
3628616 DRILLING BIT WITH INTEGRAL STABILIZER  
A rotary drilling bit having depending legs with rotary cutters journaled thereon, the legs terminating downwardly in relatively thin portions facing radially outwardly and the bit body being...
Matches 1 - 50 out of 191 1 2 3 4 >