| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 08/22/2002 | US20020112897 Superabrasive cutter with arcuate table-to-substrate interfaces |
| 08/22/2002 | US20020112895 Core Drill |
| 08/22/2002 | US20020112894 Bit for horizontal boring |
| 08/22/2002 | US20020112889 Multi-stage diffuser nozzle |
| 08/22/2002 | US20020112887 Directional borehole drilling system and method |
| 08/22/2002 | DE10108292A1 Bohrvorrichtung Drilling device |
| 08/21/2002 | EP1232320A2 A method for the manufacturing of a drill bit for percussive rock drilling and a rock drill bit and buttons therefor |
| 08/21/2002 | CN2506761Y Implanted conic carbide teeth |
| 08/20/2002 | US6435776 Method and apparatus for forming piles in place |
| 08/20/2002 | US6435288 Rock drill bit |
| 08/20/2002 | US6435287 Sharp gage for mill tooth rock bits |
| 08/20/2002 | US6435058 Rotary drill bit design method |
| 08/15/2002 | WO2002063104A2 Pile reamer with spoil container |
| 08/15/2002 | US20020108791 Cutting elements with interface having multiple abutting depressions |
| 08/15/2002 | US20020108790 Unplanar non-axisymmetric inserts |
| 08/15/2002 | US20020108789 Drilling head of a rock drill |
| 08/15/2002 | US20020108788 Metal-face-seal rock bit |
| 08/15/2002 | US20020108785 Back reaming tool |
| 08/14/2002 | EP1230465A1 Multiple cutter rotary hammer bit |
| 08/14/2002 | EP1230071A1 Chisel |
| 08/14/2002 | CN2505640Y High elastic grommet with liquid core |
| 08/13/2002 | US6431295 Rock drill |
| 08/13/2002 | US6431293 Dual-seal drill bit pressure communication system |
| 08/08/2002 | WO2002061234A1 Replaceable drill bit assembly |
| 08/08/2002 | US20020104688 Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability |
| 08/08/2002 | CA2427248A1 Replaceable drill bit assembly |
| 08/07/2002 | EP1229210A2 Twist drill |
| 08/07/2002 | EP1228286A1 Drill bit with eccentric body |
| 08/06/2002 | US6427792 Active gauge cutting structure for earth boring drill bits |
| 08/06/2002 | US6427791 Drill bit assembly for releasably retaining a drill bit cutter |
| 08/06/2002 | US6427790 Rock bit face seal having lubrication gap |
| 08/06/2002 | US6427789 Rock drilling tool with improved conveying |
| 08/06/2002 | US6427788 Underreaming rotary drill |
| 08/06/2002 | US6427782 Noise suppression drilling system |
| 08/01/2002 | WO2002059448A1 Method and device for boring holes in the floor or in rock |
| 08/01/2002 | WO2002058868A1 Cutting matrix and method of applying the same |
| 08/01/2002 | US20020100620 Design of wear compensated roller cone drill bits |
| 08/01/2002 | US20020100618 Cutting structure for earth boring drill bits |
| 08/01/2002 | US20020100617 Cutting structure for earth boring drill bits |
| 08/01/2002 | DE10160668A1 Verschleissschutzhülse mit konischer Verriegelung und Haltevorrichtung Verschleissschutzhülse with conical locking and holding device |
| 07/31/2002 | EP1227214A2 Cutting structure for drill bit |
| 07/31/2002 | EP1227213A2 Wear resistant drill bit |
| 07/31/2002 | EP0828917B1 Predominantly diamond cutting structures for earth boring |
| 07/31/2002 | CN2503194Y Diamond core drill for stratigraphic drilling |
| 07/31/2002 | CN2503193Y Diamond drill for stratigraphic drilling |
| 07/25/2002 | WO2002057590A2 Backreamer |
| 07/25/2002 | US20020096369 Drill bit assembly for releasably retaining a drill bit cutter |
| 07/25/2002 | US20020096367 Drill bit for impact-assisted directional boring |
| 07/25/2002 | US20020096362 Backreamer |
| 07/25/2002 | US20020096306 Method and apparatus for infiltrating preformed components and component assemblies |
| 07/25/2002 | DE10103143A1 Rockdrill for rock and suchlike fits hardmetal plate parts in groove for positive guidance by guide faces with each plate part wider than tool head radius. |
| 07/25/2002 | DE10102308A1 Rotary-percussive rockdrill with flushing bore uses symmetrically placed driver grooves larger than residual web round smooth cylindrical shaft for increased torque and percussion rate. |
| 07/25/2002 | DE10101731A1 Felsbohrkopf Rock drill |
| 07/24/2002 | EP1225300A2 Rock drill bit |
| 07/24/2002 | CN2502002Y Directional drill bit and matting used guiding device thereof |
| 07/23/2002 | US6423112 Cemented carbide body with improved high temperature and thermomechanical properties |
| 07/23/2002 | US6422328 Dual cutting mill |
| 07/23/2002 | US6422327 Drill bit with ridge-cutting cutter elements |
| 07/18/2002 | WO2002055835A1 Rock drill head |
| 07/18/2002 | WO2002055331A2 Sectional drive system |
| 07/18/2002 | US20020092684 Hydro-lifter rock bit with PDC inserts |
| 07/18/2002 | US20020092378 Bi-center bit adapted to drill casing shoe |
| 07/18/2002 | DE10117262A1 Rock drill has head with main and subsidiary blades, curved and diametrically opposite cutting edges, and point |
| 07/17/2002 | EP1223302A2 Cutting tooth arrangement |
| 07/17/2002 | EP1222362A1 Cutting tool for breaking hard material, and a cutting cap therefor |
| 07/17/2002 | EP0828916B1 Percussion drill bit, an insert, a use and a method of maintaining the drill bit diameter |
| 07/17/2002 | CN2500791Y Oil storage device for roller bit |
| 07/17/2002 | CN2500790Y Roller cutting structure for single roller bit |
| 07/16/2002 | US6419034 Engineered enhanced inserts for rock drilling bits |
| 07/16/2002 | US6419033 Apparatus and method for simultaneous drilling and casing wellbores |
| 07/16/2002 | US6419032 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 07/11/2002 | US20020088649 Hole opener having interchangeable sleeve reamer |
| 07/09/2002 | US6416224 Rolling cutter drill bits |
| 07/09/2002 | US6415687 Rotary cone drill bit with machined cutting structure and method |
| 07/04/2002 | WO2002052123A1 Drill bit |
| 07/04/2002 | WO2002052122A1 A method and drill bit for reducing the cuttings size to a predetermined maximum size |
| 07/04/2002 | US20020084112 Fracture resistant domed insert |
| 07/04/2002 | US20020084111 Wear resistant drill bit |
| 07/02/2002 | US6412580 Superabrasive cutter with arcuate table-to-substrate interfaces |
| 07/02/2002 | US6412579 Two stage drill bit |
| 07/02/2002 | US6412577 Roller-cone bits, systems, drilling methods, and design methods with optimization of tooth orientation |
| 07/02/2002 | US6412575 Coring bit and method for obtaining a material core sample |
| 07/02/2002 | CA2216143C A drill bit |
| 06/27/2002 | US20020079140 Method for forming cutting elements |
| 06/27/2002 | US20020079139 Side cutting gage pad improving stabilization and borehole integrity |
| 06/27/2002 | US20020079138 Roller cone drill bit structure having improved journal angle and journal offset |
| 06/26/2002 | EP1217166A1 Method and apparatus for drilling and completing a well |
| 06/26/2002 | EP1217165A1 Rock drill |
| 06/26/2002 | EP1101013A4 Reverse circulation drilling system with bit locked underreamer arms |
| 06/26/2002 | CN2497035Y Tri-cone rotary drill bit hearing with comprehensive sealing capacity |
| 06/25/2002 | US6410085 Method of machining of polycrystalline diamond |
| 06/25/2002 | US6408959 Polycrystalline diamond compact cutter having a stress mitigating hoop at the periphery |
| 06/25/2002 | US6408958 Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped |
| 06/25/2002 | US6408957 Sealed bearing roller cone bit having anti-plugging device |
| 06/20/2002 | US20020077054 Brazed diamond tools and methods for making |
| 06/20/2002 | US20020074851 Protective wear sleeve having tapered lock and retainer |
| 06/20/2002 | US20020074168 Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength |
| 06/20/2002 | US20020074166 Method and apparatus for drilling and completing a well |
| 06/18/2002 | US6406030 O-ring seal with lubricant additives for rock bit bearings |
| 06/18/2002 | US6405814 Cutting element with canted design for improved braze contact area |