| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 10/27/1994 | CA2160151A1 Down-hole hammer drill having reverse circulation and drill bit for the hammer drill |
| 10/26/1994 | CN2180770Y Diamond drill for blasthole |
| 10/26/1994 | CN1026337C Low melting point copper-manganese-zinc alloy for infiltration binder in matrix body rockm drill bits |
| 10/25/1994 | US5358063 Drill bit |
| 10/25/1994 | US5358061 Seal protection for rock bits |
| 10/25/1994 | US5358026 Investment casting process |
| 10/25/1994 | CA1332732C Cutting tools |
| 10/18/1994 | US5355969 Composite polycrystalline cutting element with improved fracture and delamination resistance |
| 10/18/1994 | US5355967 For drilling an underground wellbore from a surface location |
| 10/18/1994 | US5355750 Rolling cone bit with improved wear resistant inserts |
| 10/13/1994 | WO1994023172A1 Rotary percussive core drill bit |
| 10/13/1994 | CA2159903A1 Rotary percussive core drill bit |
| 10/12/1994 | CN2179452Y Steel PDC bit |
| 10/11/1994 | US5353885 For drilling a borehole |
| 10/11/1994 | US5353883 Drilling tool of the displacing type |
| 10/11/1994 | CA1332431C Earth working tool having a working element fabricated from cemented tungsten carbide compositions with enhanced properties |
| 10/11/1994 | CA1332408C Rotary drilling device |
| 10/05/1994 | CN2178779Y Grinding wheel burs with strengthen plating |
| 10/04/1994 | US5352045 Means of mounting a revolving cutting element |
| 10/04/1994 | US5351772 Polycrystalline diamond cutting element |
| 10/04/1994 | US5351771 Earth-boring bit having an improved hard-faced tooth structure |
| 10/04/1994 | US5351770 Ultra hard insert cutters for heel row rotary cone rock bit applications |
| 10/04/1994 | US5351769 Earth-boring bit having an improved hard-faced tooth structure |
| 10/04/1994 | US5351768 Earth-boring bit with improved cutting structure |
| 10/04/1994 | US5351758 Tubing and profile reaming tool |
| 09/29/1994 | WO1994021889A2 Improvements in or relating to drilling and to the extraction of fluids |
| 09/29/1994 | CA2158637A1 Improvements in or relating to drilling and the extraction of fluids |
| 09/27/1994 | US5350261 Twist drill |
| 09/27/1994 | US5350015 Rotary downhole cutting tool |
| 09/27/1994 | CA1332180C Seal and seal shield assembly for rotary drill bits |
| 09/27/1994 | CA1332178C Cemented carbide tip |
| 09/21/1994 | EP0615571A1 Methods of manufacturing a hub for use in a cutter of a boring head. |
| 09/21/1994 | CN2177793Y Jointing sleeve for combining mine drill |
| 09/21/1994 | CN2177792Y In hole drill bit |
| 09/20/1994 | US5349265 Synthetic diamond coated electrodes and filaments |
| 09/20/1994 | US5348770 Method of forming an uninterrupted refractory coating on a downhole drill bit cone |
| 09/20/1994 | US5348109 Cutter assemblies and cutting elements for rotary drill bits |
| 09/20/1994 | US5348108 Rolling cone bit with improved wear resistant inserts |
| 09/14/1994 | EP0561957A4 Cold headed center vacuum drill bit |
| 09/13/1994 | US5346888 Dipeptide alkyl esters and their uses |
| 09/13/1994 | US5346026 Rolling cone bit with shear cutting gage |
| 09/13/1994 | US5346025 Drill bit with improved insert cutter pattern and method of drilling |
| 09/08/1994 | DE4306981A1 Drill for rock or the like |
| 09/07/1994 | CN2176426Y Bit of air drill |
| 08/31/1994 | EP0612912A1 Earth drilling device |
| 08/30/1994 | US5342129 Bearing assembly with sidewall-brazed PCD plugs |
| 08/30/1994 | US5341890 Ultra hard insert cutters for heel row rotary cone rock bit applications |
| 08/30/1994 | US5341889 Ring clamp for a cutter ring in a tunnel drilling machine |
| 08/30/1994 | US5341888 Drilling tool intended to widen a well |
| 08/30/1994 | US5341887 Directional multi-blade boring head |
| 08/24/1994 | CN1091176A Flow control type vibration-jet device for drill bit |
| 08/24/1994 | CN1091077A Hollow drill bit with end cutting edge |
| 08/23/1994 | US5339910 Drilling torsional friction reducer |
| 08/23/1994 | CA1331520C Abrasive products |
| 08/17/1994 | CN2174558Y Oil drill nozzle with plugproof device |
| 08/16/1994 | US5337844 Drill bit having diamond film cutting elements |
| 08/16/1994 | US5337843 Hole opener for the top hole section of oil/gas wells |
| 08/16/1994 | US5337841 Hammer type soil excavating machine |
| 08/11/1994 | DE4303590A1 Rock drill |
| 08/09/1994 | US5335738 Tools for percussive and rotary crushing rock drilling provided with a diamond layer |
| 08/03/1994 | CN1090367A Drilling apparatus |
| 08/02/1994 | US5333938 Cutter bit |
| 08/02/1994 | US5333699 Drill bit having polycrystalline diamond compact cutter with spherical first end opposite cutting end |
| 08/02/1994 | US5333520 Method of making a cemented carbide body for tools and wear parts |
| 07/27/1994 | EP0608112A1 Cutter assemblies for rotary drill bits |
| 07/27/1994 | EP0607958A1 Rock drill bit |
| 07/27/1994 | EP0607937A1 Rock drilling tool |
| 07/27/1994 | EP0607135A1 Pulsation nozzle, for self-excited oscillation of a drilling fluid jet stream. |
| 07/27/1994 | CN1090010A Auto-tapping two-way cutting force moment self-equilibrating excavation drill and method thereof |
| 07/26/1994 | US5332348 Fastening devices |
| 07/26/1994 | US5332051 Optimized PDC cutting shape |
| 07/21/1994 | WO1994016191A1 A means of mounting a revolving cutting element |
| 07/21/1994 | DE4301375A1 Drill attachment |
| 07/20/1994 | EP0511298B1 Drilling tool for percussive and rotary drilling |
| 07/19/1994 | US5330016 Drill bit and other downhole tools having electro-negative surfaces and sacrificial anodes to reduce mud balling |
| 07/12/1994 | US5328776 Abrasion and impact resistant composite castings and wear resistant surface provided therewith |
| 07/12/1994 | US5328308 Gyro-stabilized tool bit and wide mouth tool bit mounting chuck |
| 07/07/1994 | WO1994015059A1 Drill bit having polycrystalline diamond compact cutter with spherical first end opposite cutting end |
| 07/07/1994 | WO1994015058A1 Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface |
| 07/06/1994 | EP0605151A1 Rotary drill bit with stabilizing elements |
| 07/06/1994 | EP0502938B1 Drilling bit irrigated by a fluid distributed by a fluidic oscillator |
| 07/05/1994 | US5325932 Stabilizer for a rock boring apparatus |
| 06/29/1994 | EP0604211A1 Composite tool for drilling bits |
| 06/28/1994 | US5323865 Earth-boring bit with an advantageous insert cutting structure |
| 06/28/1994 | US5323863 Saturated nitrile elastomer; durability, chemical resistance |
| 06/28/1994 | CA1330434C Hydraulic operated reamer |
| 06/28/1994 | CA1330433C Inclined chisel inserts for rock bits |
| 06/23/1994 | WO1994013927A1 Roller cutter drill bit having a pressure balanced seal assembly |
| 06/23/1994 | DE4242911A1 Hollow drill bit with tapered leading end |
| 06/22/1994 | EP0603122A1 Tubular drill with reinforcement sections |
| 06/22/1994 | EP0603121A1 Tubular drill |
| 06/22/1994 | EP0602753A1 Cutting disk for rock and similar materials |
| 06/22/1994 | CN2169684Y Mixed knife rock drill bit |
| 06/21/1994 | US5322139 Loose crown underreamer apparatus |
| 06/21/1994 | US5322138 Chisel insert for rock bits |
| 06/21/1994 | US5322134 Drill head |
| 06/15/1994 | EP0601840A1 Improvements in or relating to cutting elements for rotary drill bits |
| 06/15/1994 | EP0506689B1 Drilling tool for widening a bore well |
| 06/14/1994 | CA1330218C Rotary mining bit |
| 06/09/1994 | WO1994012763A1 Anchor with deoperable screw |