Matches 1 - 50 out of 259 1 2 3 4 5 6 >
Match Document Document Title
7621346 Hydrostatic bearing  
A roller cone bit having a sealed lubricant reservoir between a roller cone and a head section. A journal sleeve is included on the head section that circumscribes the journal bearing surface of...
7552783 Graded hardfacing for drill bits  
A drill bit including a bit body having an upper end adapted to be detachably secured to a drill string and at least one leg at its lower end, each leg having a downwardly and inwardly extending...
7543660 Roller cone drill bit with debris diverter plugs  
A roller cone drill bit having a bit body with at least one support arm extending from the bit body. Each support arm may have an associated spindle extending inwardly. A respective cone assembly...
7530409 Rotary roller reamer  
The invention relates to a roller assembly for a rotary roller reamer. The roller assembly includes a roller pin and a crushing roller. The crushing roller is arranged to be mounted on the roller...
7484572 Roller cone drill bit with debris flow paths through associated support arms  
A roller cone drill bit having a bit body with at least one support arm extending therefrom. Each support arm may have an interior surface and an exterior surface with an associated spindle...
7469618 Maintaining carburized case during neutral to the core heat treatment processes  
The preferred embodiments are directed toward methods and apparatus for manufacturing components for earth-boring drill bits. In the preferred embodiments, a portion of the component is coated and...
7461708 Elastomeric seal assembly having auxiliary annular seal components  
A drill bit and seal assembly therefor include a seal gland, an elastomeric sealing seal disposed in the seal gland and having a dynamic sealing surface and a static sealing surface, and at least...
7413037 Metal face seal for an earth-boring bit  
A metal face seal for an earth boring drill bit where the drill bit has a bit body, at least one bit leg, a bearing pin on each bit leg, and a cone rotatably mounted on each bearing pin. The metal...
7392862 Seal insert ring for roller cone bits  
An earth boring bit has a bit body with a depending bearing pin. An insert ring is mounted on the bearing pin. The insert ring has an inner diameter greater than an outer diameter of the bearing...
7387178 Self relieving seal  
Self relieving seals of this invention comprise an elastomeric seal body having a first sealing surface and a second sealing surface for contact with respective drill bit sealing surfaces. The seal...
7387177 Bearing insert sleeve for roller cone bit  
An earth boring bit has a bearing pin with a sleeve mounted on it. The sleeve is fixed against rotation but able to float relative to the bearing pin. A cone fits over and forms a bearing surface...
7320375 Split cone bit  
A roller cone drill bit and a method for designing thereof. The roller cone drill bit includes a bit body configured to be coupled to a drill string and a journal depending from the bit body. A...
7311159 PCD face seal for earth-boring bit  
An earth-boring bit has a mechanical face seal assembly with PCD faces. The bit has a bearing shaft with a cone rotatably mounted on the bearing shaft. The seal locates between the bearing shaft...
7306061 Mud diverter for earth-boring bit  
A rolling cone earth boring bit has a diverter and an arcuate segment located between the bit leg and the back face of the cone to divert debris from the seal gland area. The diverter has an oblong...
7278500 Roller cutter  
A roller cutter includes a hub having crushing members mounted on an outer periphery thereof, and a shaft on which the hub is mounted for rotation. Opposite ends of the shaft include respective...
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...
7188691 Metal seal with impact-absorbing ring  
Disclosed is a seal assembly for dynamically sealing between rotatable members, such as employed to seal the rolling cone of a rock bit. One preferred assembly includes an energizer, first and...
7128173 PCD face seal for earth-boring bit  
An earth-boring bit has a mechanical face seal assembly with PCD faces. The bit has a bearing shaft with a cone rotatably mounted on the bearing shaft. The seal locates between the bearing shaft...
7117961 Dynamic seal with soft interface  
A device and method for dynamically sealing between rotatable members such as a rolling cone of a rock bit. The assembly includes a seal ring having a facing surface of a relatively hard material,...
7086487 Anti-mud packing seal gland  
An earth boring bit has a seal cavity that is eccentric to agitate drilling fluid and avoid mud packing. The bit body having bit legs, each having a bearing pin. A cone rotatably mounts on the...
7066287 Mud debris diverter for earth-boring bit  
A rolling cone earth boring bit has a diverter located between the bit leg and the back face of the cone to divert debris from the seal gland area. The diverter has a base that inserts into a hole...
7044242 Roller cone bits with reduced packing  
A roller-cone drill bit in which a large groove is machined into the backface of each cone, near the crack where the cone meets the arm assembly. By making the outer lip of this crack more exposed...
7036613 Lip seal for roller cone drill bit  
A radial lip seal for use with roller cone drill bits is at least partially collapsed and held in place when the drill bit is subjected to hydrostatic pressure in the well bore when performing...
7013998 Drill bit having an improved seal and lubrication method using same  
A drill bit ( 100 ) for drilling a wellbore that traverses subterranean formations includes a drill bit body ( 106 ) having a plurality of journal pins ( 112 ), each having a bearing surface ( 128...
7000712 Bearing seal  
A seal assembly for a shaft supporting a rotary element comprises a sealing ring having an inner radial surface in contact with a seal surface of the shaft. The sealing ring comprising a disc...
6935443 Mini disk bit  
A small sized disk bit includes a bit holder accommodated in a bearing journal on its side (overhangingly), and a disk body with asymmetrically designed wedge flanks mounted rotatably thereon. To...
6820704 Rock bit seal with extrusion prevention member  
Annular seals of this invention comprise an elastomeric seal body that is configured to fit within a seal gland of a rock bit. The seal comprises a first seal surface, for providing a seal along a...
6789634 Self-lubricating elastomeric seal with polarized graphite  
O-ring seals for rock bit bearings comprise a body formed from an elastomeric material having a lubricant additive in at least the dynamic seal surface to reduce the coefficient of friction and...
6769500 Optimized earth boring seal means  
A rock bit seal in which the shape of the retainer lip (which restrains the seal from axial motion in response to pressure differentials) is optimized, with respect to the as-deformed shape of the...
6752223 Roller cone bit with improved seal gland design  
In the seal gland in a rotating cone drill bit, the O-ring is initially compressed between the journal and a central portion of the gland which has a cross-section parallel to the journal. These...
6725947 Roller bits with bearing failure indication, and related methods, systems, and methods of manufacturing  
A rotary drill bit includes a bit body that includes a plurality of upright legs that terminate in an exterior bearing surface. At least one roller cutter is affixed to a corresponding exterior...
6708786 Mounting attachment and bearing system for an industrial earth-boring cutter  
A rotary cutter mount for an earth-boring cutter includes a bearing journal adapted to be coupled to a cutter body. A first mounting end of the bearing journal is shaped to enable rotationally...
6695079 Dual-seal drill bit pressure communication system  
A drill bit for use in a borehole at least partially containing drilling fluid includes a bit body having at least two bit components, including at least one leg, the leg having a journal segment,...
6637528 Bit apparatus  
A bit apparatus in which a cutter member having cutting teeth is axially supported on a shaft for rotation about the shaft, and a bearing mechanism is interposed between the cutter member and the...
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...
6578647 Sealing structure for a rock drill bit  
A sealing structure for a rock drill bit includes an elastomeric diaphragm for installation in the drill bit so as to separate grease from drilling mud. The diaphragm has an aperture extending...
6536542 Rock bit seal with multiple dynamic seal surface elements  
Seals of this invention comprise an annular elastomeric ring-shaped body having a dynamic surface disposed along a first body portion, the dynamic surface comprising at least two surface elements...
6533051 Roller cone drill bit shale diverter  
A roller cone drill bit includes a bit body adapted to be rotated about a longitudinal axis. At least one leg which terminates in a shirttail portion depends from the bit body. The shirttail...
6513607 Metal-face-seal rock bit  
A bit is provided having at least one leg extending downwardly and inwardly from the bit body. A cutter cone is rotatably mounted on a shaft extending inwardly from the lower portion of each leg....
6474424 Rotary cone drill bit with improved bearing system  
A rotary cone drill bit for forming a borehole having a bit body with an upper portion adapted for connection to a drill string. A number of support arms extending from the bit body with each...
6427790 Rock bit face seal having lubrication gap  
A seal arrangement useful in a rolling cutter rock drill bit includes a pair of rigid rings disposed between the leg of the bit body and the rolling cutter. The rings have opposing faces, which...
6408957 Sealed bearing roller cone bit having anti-plugging device  
A roller cone drill bit is disclosed which includes a bit body having at least one leg depending from the bit body. The leg has a journal formed on it at a lower end. The bit body includes an air...
6401843 Drilling head with a cone rock bit  
A drilling head with a cone rock bit, each cone having a stationary part and a rotary part which rotates about an axis of rotation. Also included is a dynamic sealing device between the stationary...
6390209 Roller cone drill bit with improved pressure compensation  
A pressure compensating assembly for use in roller cone drilling bits of the sealed bearing type. The compensating assembly includes a hollow body arranged to fit into a cavity in the bit connected...
6357540 Rotary drill bit with lip seal in roller cone bit  
A roller-cone drill bit in which a double lip seal, made of a self-lubricating elastomer, protects the bearings from the mud.
6336512 Drill bit having canted seal  
A drill bit having a canted or non-canted leg backface, a canted or non-canted seal in the interface between the cone backface and the shirttail, and a canted seal that can be semi-encapsulated so...
6330923 Sealing bearings in drill bits  
A sealed bearing for a drill bit including cutting cones and having metal sealing surfaces between the seal cup base and the rotating cone combined with a compressible neoprene or like material...
6305483 Multi-piece rotary cone drill bit seal  
Multi-piece seals of this invention include an annular seal body that is formed from an elastomeric energizing material, and that has a static seal surface along one surface and a contacting...
6264367 Dual-seal drill bit with fluid cleaning capability  
A drill bit for use in an earthen annulus that contains loose particles is connected to a fluid supply source and includes a bit body having at least one journal segment and at least one fluid...
6260635 Rotary cone drill bit with enhanced journal bushing  
The present invention allows the load carrying capability of a drill bit journal bearing or bushing to be increased. The present invention increases the length of the journal bushing by using the...
Matches 1 - 50 out of 259 1 2 3 4 5 6 >