| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 01/15/2004 | US20040007394 Cutter and method of manufacture thereof |
| 01/15/2004 | US20040007393 Cutter and method of manufacture thereof |
| 01/14/2004 | EP1380719A1 Cutter and method of manufacture thereof |
| 01/14/2004 | EP1112433B1 Roller cone drill bit, method of designing the same and rotary drilling system |
| 01/14/2004 | CN2599206Y Guide drill bit |
| 01/14/2004 | CN2599205Y Connecting structure of single roller bit |
| 01/13/2004 | US6675917 Twist drill bit for rock drilling |
| 01/13/2004 | US6675916 Boring machine and auger bit |
| 01/13/2004 | CA2217592C Dual functioning seal for rock bits |
| 01/13/2004 | CA2172457C Hollow auger head assembly |
| 01/08/2004 | WO2004003333A1 Hollow auger head assembly |
| 01/08/2004 | WO2004003332A1 Rock drill bit and method for the manufacture thereof |
| 01/08/2004 | US20040003946 Arcuate-shaped inserts for drill bits |
| 01/08/2004 | DE10225061A1 Gespülter Gesteinsbohrer Flushed rock drill |
| 01/07/2004 | EP0916014B1 Apparatus and method for milling a hole in casing |
| 01/07/2004 | CN2597653Y Artificial diamond poly-crystal composite piece drill bit |
| 01/07/2004 | CN2597652Y Drill bit with multi-long and-short edges |
| 01/06/2004 | US6672406 Multi-aggressiveness cuttting face on PDC cutters and method of drilling subterranean formations |
| 01/06/2004 | US6672015 Concrete pile made of such a concrete and method for drilling a hole adapted for receiving the improved concrete pile in a weak ground |
| 01/02/2004 | EP1373675A1 Method for drilling and drilling apparatus |
| 01/01/2004 | US20040001740 Cutting insert for a drill, and boring tool using this insert |
| 01/01/2004 | US20040000435 Anti-mud packing seal gland |
| 01/01/2004 | US20040000432 Hollow auger head assembly |
| 12/31/2003 | WO2004000543A1 Self sharpening polycrystalline diamond compact with high impact resistance |
| 12/31/2003 | CN2595977Y Grinding-in system for tri-cone rotary drill bit bearing |
| 12/31/2003 | CN1464171A Roller bit with roller pull-off prevention alarm apparatus |
| 12/31/2003 | CN1132717C Braze welding process of composite polycrystal-diamond bit |
| 12/30/2003 | US6668949 Underreamer and method of use |
| 12/30/2003 | US6668946 Backreamer |
| 12/30/2003 | CA2261917C Engineered enhanced inserts for rock drilling bits |
| 12/25/2003 | US20030235691 Polycrystalline diamond partially depleted of catalyzing material |
| 12/24/2003 | WO2003106815A1 Disk bit, cutter head, and cutter drum |
| 12/24/2003 | DE10232214C1 Betonbohrer Concrete drill |
| 12/24/2003 | CN2594441Y Gate drill bit for pump grouting concrete piles |
| 12/18/2003 | WO2003103914A1 Drill bit |
| 12/18/2003 | US20030230434 Bore bit for very hard material |
| 12/17/2003 | EP1371811A2 Roller cone drill bit, method of designing the same and rotary drilling system |
| 12/17/2003 | CN2592846Y Pipe-following eccentric hammer |
| 12/17/2003 | CN2592845Y Diamond composite slice |
| 12/17/2003 | CN2592844Y Flow-collecting groove diamond drill bit |
| 12/17/2003 | CN2592843Y Eccentric tri-cone rotary drill bit |
| 12/17/2003 | CN2592842Y Tri-cone rotary drill bit |
| 12/17/2003 | CN2592841Y PDC drilling bit head flow field visualizing apparatus |
| 12/16/2003 | US6663186 Cutting bit |
| 12/11/2003 | WO2003102355A1 Wedge activated underreamer |
| 12/11/2003 | WO2003102354A1 Underreamer |
| 12/11/2003 | US20030226693 Fracture and wear resistant compounds and rock bits |
| 12/10/2003 | EP1369550A1 Aid to make a decision for the selection of drilling and/or cutting elements |
| 12/10/2003 | CN2591212Y Thin wall diamond drill bit |
| 12/10/2003 | CN1460768A Drilling bit structure for enlarging hole |
| 12/09/2003 | US6659207 Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability |
| 12/09/2003 | US6659206 Hardfacing composition for rock bits |
| 12/09/2003 | US6659205 Rock drill |
| 12/09/2003 | US6659199 Bearing elements for drill bits, drill bits so equipped, and method of drilling |
| 12/09/2003 | US6659198 Back reamer assembly |
| 12/09/2003 | US6658968 Percussive rock drill bit and buttons therefor and method for manufacturing drill bit |
| 12/09/2003 | CA2200726C A rock drill bit and cutting inserts |
| 12/06/2003 | CA2430513A1 Flushed rock drill |
| 12/04/2003 | WO2003100210A1 A downhole tool for use in a wellbore |
| 12/04/2003 | WO2003100205A1 Method and dual reamer apparatus for forming bored hole |
| 12/04/2003 | WO2003049889A3 Consolidated hard materials, methods of manufacture, and applications |
| 12/04/2003 | US20030221873 Fixed blade fixed cutter hole opener |
| 12/03/2003 | EP1367214A1 Polycrystalline diamond cutters with enhanced resistance |
| 12/03/2003 | EP1117894B1 Roller-cone bits, systems, drilling methods, and design methods with optimization of tooth orientation |
| 12/03/2003 | EP1115961B1 Through-drill string conveyed logging system |
| 12/02/2003 | US6655481 Methods for fabricating drill bits, including assembling a bit crown and a bit body material and integrally securing the bit crown and bit body material to one another |
| 12/02/2003 | US6655480 Cutting insert for percussion drill bit |
| 12/02/2003 | US6655479 Twist-drill bit |
| 12/02/2003 | US6655478 Row of cutting elements disposed on roller cone defines a gage row, toughness |
| 12/02/2003 | US6655234 Forming substrate of hard material having internal cavity and attachment surface, filling cavity with incompressible packed particulate filler material, forming superabrasive table on surface at high temperature and pressure, removing filler |
| 12/02/2003 | CA2238628C Combination milling tool and drill bit |
| 12/02/2003 | CA2075900C Down-the-hole drill tool for drilling in advance of a casing tube |
| 11/27/2003 | WO2003071087A8 Pantograph underreamer |
| 11/27/2003 | US20030217869 Polycrystalline diamond cutters with enhanced impact resistance |
| 11/27/2003 | US20030217868 Single cone rock bit having inserts adapted to maintain hole gage during drilling |
| 11/27/2003 | US20030217867 Single-cone rock bit having cutting structure adapted to improve hole cleaning, and to reduce tracking and bit balling |
| 11/27/2003 | US20030217865 Bore lining and drilling |
| 11/27/2003 | US20030217850 Downhole tool for use in a wellbore |
| 11/25/2003 | US6652195 Method and apparatus for forming piles in place |
| 11/25/2003 | US6651758 Rolling cone bit with elements fanned along the gage curve |
| 11/25/2003 | US6651757 Toughness optimized insert for rock and hammer bits |
| 11/25/2003 | US6651756 Steel body drill bits with tailored hardfacing structural elements |
| 11/20/2003 | WO2003096697A1 Method and apparatus for a tracking stereo target |
| 11/20/2003 | WO2002055331A3 Sectional drive system |
| 11/19/2003 | EP1362954A1 Milling head for a construction machine |
| 11/19/2003 | CN2586811Y Cone bit having dorsal gauge structure |
| 11/19/2003 | CN1128290C Bearing sealing structure for rotary drill bit |
| 11/13/2003 | WO2003093626A1 Stabilizing system and methods for a drill bit |
| 11/12/2003 | CN2585961Y Thin wall diamond engineering bit |
| 11/11/2003 | US6644422 Pantograph underreamer |
| 11/06/2003 | WO2003091531A1 A roller bit with a journal pin offset from the central axis thereof |
| 11/05/2003 | EP1359258A1 Pile foot cutter |
| 11/05/2003 | EP1027519A4 Apparatus for directional drilling |
| 11/05/2003 | CN2584797Y Superhigh pressure drill bit with centering guide |
| 11/04/2003 | US6640914 Percussion borer for forming bores in stone material |
| 11/04/2003 | US6640913 Drill bit with canted gage insert |
| 10/30/2003 | US20030201125 Stabilizing system and methods for a drill bit |
| 10/29/2003 | EP1356185A1 A method and drill bit for reducing the cuttings size to a predetermined maximum size |
| 10/29/2003 | EP1228286B1 Drill bit with eccentric body |
| 10/29/2003 | EP0775245B1 Modular rotary drill bit |