Matches 151 - 200 out of 310 < 1 2 3 4 5 6 7 >
Match Document Document Title
5407022 Free cutting gage insert with relief angle  
A rolling cone drill bit is disclosed having gage inserts which are installed so as to create a relief angle between the outer surface of each insert and the sidewall of the borehole. Each gage...
5353885 Rock bit  
A rock bit is disclosed having a plurality of rolling cone cutters each having a gage row of inserts oriented to face the borehole bottom for crushing the same, and a second row of heel gage...
5351769 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 has a plurality of teeth formed integrally thereon and arranged in circumferential rows....
5351771 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 has a plurality of teeth formed integrally thereon and arranged in circumferential rows....
5351770 Ultra hard insert cutters for heel row rotary cone rock bit applications  
A rotary cone rock bit for drilling boreholes in an earthen formation is disclosed. One or more rotary cones are rotatively retained on a journal bearing connected to the rock bit. These rotary...
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...
5346026 Rolling cone bit with shear cutting gage  
An earth-boring bit has a cutter provided with hard gage inserts that protrude from the gage surface of the cutter to engage the side of the borehole for holding gage. The gage insert has a...
5332050 Well drilling tool  
The invention relates to improvement in well drilling tools to prevent drilling fluids and solid particles present in a subterranean location from adhering to drilling equipment. A...
5322138 Chisel insert for rock bits  
A tungsten carbide chisel insert for rock bits is disclosed having a cylindrical base section and a cutting tip section, the top of the tip section having an elongated crest, the remainder of the...
5311958 Earth-boring bit with an advantageous cutting structure  
An earth-boring bit is provided with three cutters, two of the three cutters are provided with heel disk cutting elements defined by a pair of generally oppositely facing disk surfaces that...
5282512 Drilling tool with rotating conical rollers  
A drilling tool with rotating conical rollers, such as a bicone, a tricone, etc. wherein each roller is fitted with several circular rows of teeth 22 made of tungsten carbide or the like. Each...
5279374 Downhole drill bit cone with uninterrupted refractory coating  
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...
5224560 Modular drill bit  
A modular drill bit mounts legs within recesses in a body which are parallel to the central axis of the body using threaded studs with tapered outer portions, in conjunction with an attached pin...
5224559 Hardfaced drilling tool joints  
Disclosed are methods of hardfacing and hardfaced tool joints used for connecting together drilling pipe for drilling bore holes in the earth, such as drilling to possible oil and gas formations....
5205684 Multi-component cutting element using consolidated rod-like polycrystalline diamond  
An enlarged diamond table for use as a cutter in rotating drill bits is provided by disposing a plurality of thermally stable or leached polycrystalline diamond (PCD) rod-like elements within a...
5201376 Rock bit with improved gage insert  
A roller cutter rock bit includes a cutter constructed with a relief adjacent the cutter heel and gage inserts which each include elongated gage and bottom hole cutting edges which are separated...
5172777 Inclined chisel inserts for rock bits  
A chisel gage insert is disclosed having a larger nose radius at the outer end of the insert crest than at the inner end thereby providing more mass on the portion of the insert that contacts the...
5152353 High speed rock bit  
A rock bit for drilling subterranean formations has improved dynamic O-ring seals for retaining lubricant around the rock bit bearings during operation at more than 50 meters per minute surface...
5145016 Rock bit with reaming rows  
An improved rotary rock bit having a circumferential row of wear resistant inserts protruding from the gage surface of each rolling cone cutter. The inserts are designed to efficiently break and...
5131480 Rotary cone milled tooth bit with heel row cutter inserts  
A milled tooth rotary cone rock bit, as it is operated in a borehole, subjects the heel of each cone into contact with the borehole wall when the gage row milled teeth wear. The heel row of each...
5111894 Uninterrupted drill bit  
A drill bit for drilling in the ground includes a pair of drilling cones having axes of rotation that converge near a drilling center of the bit. The cones each include a plurality of ridges or...
5074367 Rock bit with improved shank protection  
An improved rotary rock bit is described having a plurality of wear resistant inserts protruding along the leading edge of the bearing segment shanks. These inserts break up large chunks of...
4967854 Double cone cutting head for a drill bit  
The present invention is directed to a cutting head for use in a rotary drill bit in which the cutting head comprises a stem and a base integrally formed with the stem. The base has a first cutting...
4956238 Manufacture of cutting structures for rotary drill bits  
A cutting structure, for a rotary drill bit, is of the kind comprising a preform cutting element having a front cutting face formed of superhard material, such as polycrystalline diamond, and a...
4947945 Relating to cutter assemblies for rotary drill bits  
A cutter assembly, for a rotary drill bit, comprises a preform cutting element mounted on a carrier in the form of a stud or post received in a socket in the bit body. The carrier is a metal matrix...
4944774 Hard facing for milled tooth rock bits  
A hard facing for teeth on a milled tooth rock bit comprises at least 65% by weight of a mixture of tungsten carbide particles and a balance of steel bonding the carbide particles together and to...
4940099 Cutting elements for roller cutter drill bits  
A rotary drill bit (10) having a plurality of roller cutters (20) with rows (32A, 32B, 32C, 32D) of cutting inserts (34,36,38,40) mounted within sockets (35,46) on the frusto-conical cutter body...
4934467 Drill bit wear resistant surface for elastomeric seal  
An improved drill bit seal arrangement, including a seal ring having a boronized outer annular surface which is fabricated separate and apart from the journal bearing structure of the drill bit...
4907664 Rock cutting tool  
A drilling member for use in a drilling system, such as for drilling a large diameter subterranean hole or for removing rock at the earth's surface, in which the system employs a cutting head...
4854405 Cutting tools  
There are disclosed two embodiments of a hard metal insert adapted to be installed on the face of a cutting tool, each insert comprising inner and outer bodies having particles of carbide or other...
4832139 Inclined chisel inserts for rock bits  
An inclined chisel crested insert is disclosed for use on the gage row of a cone for a rotary cone rock bit. The insert has a different cone angle on opposite sides of the crown of the insert. An...
4811801 Rock bits and inserts therefor  
The present invention is a rock bit insert including a polycrystalline diamond surface on an insert body having a head portion made from a material with elasticity and thermal expansion properties...
4793427 Disc cutters for rock working machines  
A hardmetal ring is a size for size or low interference fit on the body of a disc cutter of a rock working machine, such as a boxhole borer. In one embodiment the ring is gable shaped and clamped...
4727943 Rotary drill bit  
A drill bit for drilling into earth formations comprising a plurality of sections having connection means to connect said sections to form a unitary drill bit; means in said plurality of sections...
4722405 Wear compensating rock bit insert  
A composite sintered rock bit insert for use in a rolling cutter is fabricated from two tungsten carbide components. The first component is formed of a tungsten carbide composite that is less wear...
4679640 Method for case hardening rock bits and rock bits formed thereby  
In the method of manufacturing case hardened rock bits formed of a previously known conical profile for containing spaced apart cutter inserts in a common circumferential row about the cone,...
4666797 Wear resistant facings for couplings  
This invention relates to mixtures of tungsten carbide, niobium metal, and molybdenum metal powders for use in the hardfacing of drill pipe couplings used in earth boring operations. It has been...
4660444 Hardening of selected areas of an earth boring rockbit  
Bearing surfaces or other selected areas of component parts of a rotary cone earth boring rockbit are carburized or otherwise surface enriched by the sequential steps of coating the selected...
4630693 Rotary cutter assembly  
A rotary cutter assembly employs a wear sleeve to improve the durability of the drill head and to seal off a fluid passageway in the shank of a drill bit which is mounted to the drill head. The...
4630692 Consolidation of a drilling element from separate metallic components  
The method of forming a cutter, which includes a core and a wear resistant insert defining a body means which includes (a) applying to the body means a mixture of: (i) wear resistant metallic...
4624329 Rotating cutter drill set  
The present invention relates to a drill bit incorporating one or more rotary cutters. The rotary cutters are supported for rotation by a bearing assembly including ball bearings running in races...
4623027 Unsegmented rotary rock bit structure and hydraulic fitting  
An unsegmented structure for a rotary rock bit is disclosed comprising a one piece body of spring steel wherein individual journal members after being assembled with associated rotary rock cutters...
4595067 Rotary drill bit, parts therefor, and method of manufacturing thereof  
A roller cutter for a rotary drill bit comprising a conical roller cutter body of metal, and a plurality of cutting elements secured to the outer surface of the roller cutter body primarily by...
4591008 Lube reservoir protection for rock bits  
This invention discloses a method to protect the lubrication reservoir system for sealed bearing rotary cone rock bits. A multiplicity of flush-type tungsten carbide inserts are positioned in each...
4567954 Replaceable nozzles for insertion into a drilling bit formed by powder metallurgical techniques and a method for manufacturing the same  
Replaceable nozzles may be provided in a tungsten carbide drill bit manufactured by powder metallurgical infiltration techniques wherein at least one nozzle is threaded into a corresponding molded...
4511006 Drill bit and method of use thereof  
The cutting edge of a bit of a rotary drill comprises an agglomerate of natural or synthetic diamond mounted at the free end of a shank freely rotatable in a socket in the body. Preferably the...
4496013 Prevention of cone seal failures in rock bits  
There is provided a rock bit comprising a bit body having a dome and a plurality of legs, each with a journal pin. A cutter cone is mounted on each journal pin with a cone seal between the journal...
4488608 Rotary stone-cutting head with hardened teeth inserts  
A rotary stone-cutting head has a body generally centered on and adapted to be rotated in a predetermined direction about a body axis. An array of cutter supports on the body are angularly spaced...
4452325 Composite structure for cutting tools  
A cutting tool comprises a compact bundle of elongated, substantially cylindrical fibers or rods formed from a cemented metal carbide material. The bundle of fibers is shrink-fitted within a metal...
4441566 Drill bit with dispersed cutter inserts  
An earth boring drill bit has hard metal inserts in its cutter shells that are spaced to eliminate rows. Each insert has a surrounding boundary zone with inner and outer loops corresponding to the...
Matches 151 - 200 out of 310 < 1 2 3 4 5 6 7 >