| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 05/07/1985 | US4515227 Nozzle placement in a diamond rotating bit including a pilot bit |
| 05/07/1985 | US4515226 Tooth design to avoid shearing stresses |
| 05/07/1985 | CA1186679A1 Rotary drill bit |
| 04/30/1985 | US4514098 Wound wire bearing |
| 04/30/1985 | US4514097 Rotary drill bit |
| 04/30/1985 | US4513829 Chip relief for rock bits |
| 04/30/1985 | CA1186301A1 Spaced button thrust surface for earth boring bit |
| 04/24/1985 | EP0138737A2 Earth boring bit with pressure compensating metal face seal |
| 04/23/1985 | US4512669 Rock bit bearing pressure equalization system |
| 04/23/1985 | US4512426 Rotating bits including a plurality of types of preferential cutting elements |
| 04/23/1985 | US4512425 Up-drill sub for use in rotary drilling |
| 04/16/1985 | US4511008 In an earth boring apparatus |
| 04/16/1985 | US4511006 Drill bit and method of use thereof |
| 04/09/1985 | US4509607 Compressible pressure compensator within closed lubricant volume of an earth boring apparatus |
| 04/09/1985 | CA1185276A1 Variable diameter earth boring bit |
| 04/09/1985 | CA1185230A1 Solid head bit with tungsten carbide central core |
| 04/02/1985 | US4508184 Roller reamer/stabilizer |
| 04/02/1985 | US4508183 Method and apparatus for lubricating a drill bit |
| 04/02/1985 | US4507843 Clamping assembly |
| 03/26/1985 | US4506997 Rock bit cone retention |
| 03/19/1985 | US4505721 Solid state diffusion bonding of abrasive compact, cemented carbid |
| 03/19/1985 | US4505343 Plural-part earth bit, and an improved bit head therefor |
| 03/19/1985 | US4505342 Drill bit |
| 03/12/1985 | US4503919 Boring devices |
| 03/05/1985 | US4502554 Expansible tool for reaming frustoconical undercuts in cylindrical holes |
| 02/26/1985 | US4501338 Grease pump for sealed bearing rotary cone rock bits |
| 02/20/1985 | EP0133386A2 Polycrystalline diamond body with enhanced surface irregularities and methods of making the same |
| 02/19/1985 | US4499959 Tooth configuration for an earth boring bit |
| 02/19/1985 | US4499958 Drag blade bit with diamond cutting elements |
| 02/19/1985 | US4499795 Method of drill bit manufacture |
| 02/19/1985 | US4499642 Composite bearing |
| 02/19/1985 | CA1182623A1 Triad for rock bit assembly |
| 02/12/1985 | US4498549 Cutting member for rotary drill bit |
| 02/12/1985 | CA1182443A1 Rotary drill bit |
| 02/12/1985 | CA1182311A1 Undercutting device for anchor holes |
| 02/05/1985 | US4497520 Rotatable cutting bit |
| 02/05/1985 | US4497384 Reamer disassembly |
| 02/05/1985 | US4497383 Undercutting device for anchor holes |
| 02/05/1985 | US4497382 Retractable core drill bit |
| 02/05/1985 | CA1182105A1 Method of manufacturing large diameter oil well drilling bit and large diameter oil well drilling bit |
| 01/29/1985 | US4496372 Abrasive bodies |
| 01/29/1985 | US4496013 Prevention of cone seal failures in rock bits |
| 01/29/1985 | US4496011 Tool for forming earth holes having fixed walls and method therefor |
| 01/22/1985 | US4494749 Seal assemblies |
| 01/22/1985 | US4494618 Drill bit with self cleaning nozzle |
| 01/16/1985 | EP0131451A2 Improvements in drilling equipment |
| 01/08/1985 | US4492278 Roof bit |
| 01/08/1985 | US4492277 Hydraulic energy drill bit |
| 01/08/1985 | CA1180692A1 Surface controlled blade stabilizer |
| 01/01/1985 | US4491457 Drilling bit |
| 01/01/1985 | US4491428 Earth boring drill bit with snap ring cutter retention |
| 01/01/1985 | US4491188 Diamond cutting element in a rotating bit |
| 01/01/1985 | US4491187 Surface controlled auxiliary blade stabilizer |
| 12/25/1984 | US4489796 Insert for a mine tool roof bit and a method of drilling therewith |
| 12/18/1984 | US4488609 Mining drill |
| 12/18/1984 | US4488608 Rotary stone-cutting head with hardened teeth inserts |
| 12/18/1984 | US4488606 Method of excavating an under-reamed pile bore |
| 12/18/1984 | US4488605 Drill assembly for forming a hole |
| 12/18/1984 | CA1179673A1 Cutting member for rotary drill bits |
| 12/18/1984 | CA1179531A1 Sealed bearing rotary rock bit assembly |
| 12/05/1984 | EP0127077A2 A rotatable drill bit |
| 12/05/1984 | EP0023487B1 Rotary cutterhead for an earth boring machine |
| 12/04/1984 | US4486104 Composite bearing |
| 12/04/1984 | CA1178943A1 Down-the-hole percussion hammer |
| 11/28/1984 | EP0126409A2 Boring tool |
| 11/27/1984 | US4484644 Steel and tungsten carbide |
| 11/27/1984 | US4484642 Reverse action auger |
| 11/27/1984 | US4484640 Tool for formation of holes in macroporous compressible soils |
| 11/22/1984 | WO1984004554A1 Device for digging wells in the soil |
| 11/20/1984 | CA1178267A1 Cutting member for rotary drill bit |
| 11/08/1984 | WO1984004353A1 Rotatable cutting bit |
| 11/07/1984 | EP0124290A2 Drilling apparatus |
| 11/07/1984 | EP0123725A1 Earth boring machine cutterhead and frame |
| 11/06/1984 | US4481016 Method of making tool inserts and drill bits |
| 11/06/1984 | US4480874 Retainer device for auger, roof and the like type bits |
| 11/06/1984 | US4480704 Wall-contacting apparatus for earth boring by the rotary method |
| 10/30/1984 | CA1177059A1 Tool forming a hole in macroporous compressible soil and a method of forming a hole by the same tool |
| 10/24/1984 | EP0122893A1 Excavating tool |
| 10/23/1984 | US4478299 Rock bit construction |
| 10/23/1984 | US4478298 Diamond wafer attached to a tungsten carbide substrate |
| 10/23/1984 | US4478297 Drill bit having cutting elements with heat removal cores |
| 10/23/1984 | US4478296 Drill bit having multiple drill rod impact members |
| 10/23/1984 | US4478295 Tuned support for cutting elements in a drag bit |
| 10/17/1984 | EP0122242A1 Rock drill |
| 10/17/1984 | EP0121802A2 Tooth configuration for an earth boring bit |
| 10/16/1984 | CA1176235A1 Rock bit with improved shirttail ventilation |
| 10/10/1984 | EP0121124A2 An improved diamond cutting element in a rotating bit |
| 10/10/1984 | EP0120912A1 Earth-boring drill bit with rectangular nozzles |
| 10/09/1984 | US4475606 Drag bit |
| 09/26/1984 | EP0119620A2 Improved tooth design using cylindrical diamond cutting elements |
| 09/26/1984 | EP0119268A1 Hydrojet drilling means and method |
| 09/25/1984 | US4473125 Insert for drill bits and drill stabilizers |
| 09/25/1984 | CA1175039A1 Two-stage pressure relief valve |
| 09/19/1984 | EP0118788A2 Method of and device for utilizing geothermal energy |
| 09/18/1984 | US4471845 Rotary drill bit |
| 09/18/1984 | CA1174665A1 Abradable cutter protection |
| 09/18/1984 | CA1174664A1 Rotary rock bit with independently true rolling cutters |
| 09/18/1984 | CA1174662A1 Roller-reamer |
| 09/12/1984 | EP0118127A2 An improved tooth design to avoid shearing stresses |
| 09/11/1984 | US4470470 Boring apparatus |