| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 03/29/1984 | WO1984001186A1 Rotary drill bits |
| 03/28/1984 | EP0103820A2 Multi-insert cutter bit |
| 03/27/1984 | US4439050 Rotary bit bearing system |
| 03/27/1984 | CA1164448A1 Thrust face bearing structure for rolling cutter drill bit |
| 03/27/1984 | CA1164447A1 Screened hollow stem auger for use in well drilling and testing process |
| 03/21/1984 | EP0103391A2 Cutter inserts for picks, picks and pick blanks |
| 03/20/1984 | US4437774 Drilling bit bearings |
| 03/13/1984 | US4436167 Method of excavating a pile hole and an apparatus therefor |
| 03/13/1984 | US4436164 Lubrication failure detection system |
| 03/13/1984 | US4436158 Releasable drill string device and method |
| 03/13/1984 | CA1163626A1 Dynamic seal for rolling cutter drill bit |
| 03/13/1984 | CA1163625A1 Body structure and nozzle for enhancing the flow of drilling fluid in a rotary drill bit |
| 03/07/1984 | EP0102197A2 Downhole tool with replaceable tool sleeve sections |
| 02/28/1984 | US4433739 Mining drill |
| 02/28/1984 | US4433738 Method and apparatus for use when changing the direction of a well bore |
| 02/22/1984 | EP0101096A1 Core and oil-well drill bits |
| 02/21/1984 | US4432883 Seal with teflon or rubber |
| 02/15/1984 | EP0100437A2 A single-pass notching and drilling tool and method of drilling a blast hole therewith |
| 02/14/1984 | US4431066 Stressed relieved bit leg for an earth boring bit |
| 02/14/1984 | US4431065 Underreamer |
| 02/14/1984 | CA1162184A1 Rotary rock bit with improved thrust flange |
| 02/14/1984 | CA1162183A1 Rotary rock bit with improved thrust flange |
| 02/14/1984 | CA1162182A1 Method for producing an improved layer particular for a drill bit |
| 02/07/1984 | US4429854 Dual squeeze seal gland |
| 02/07/1984 | US4429755 Drill with polycrystalline diamond drill blanks for soft, medium-hard and hard formations |
| 02/07/1984 | CA1161832A1 Earth boring device |
| 02/07/1984 | CA1161831A1 Lubricating device |
| 01/31/1984 | USRE31511 Rotary cutterhead for an earth boring machine |
| 01/31/1984 | US4428687 Floating seal for earth boring bit |
| 01/31/1984 | US4428588 Radial belleville seal with encapsulated resilient core member |
| 01/31/1984 | US4428442 Rock bit lubrication system |
| 01/31/1984 | CA1161428A1 Drill bit |
| 01/31/1984 | CA1161421A1 Composite grease for rock bit bearings |
| 01/24/1984 | US4427307 Rotary drill bit |
| 01/24/1984 | US4427221 Drill bit nozzle retention and alignment system |
| 01/24/1984 | US4427082 Mining drill |
| 01/24/1984 | US4427081 Rotary rock bit with independently true rolling cutters |
| 01/24/1984 | CA1161028A1 Drill bit for deep well drilling |
| 01/11/1984 | EP0097879A2 Drilling machine |
| 01/10/1984 | CA1160214A1 Shank adaptor for rock-drilling machines |
| 01/10/1984 | CA1160213A1 Drill bit nozzle |
| 01/04/1984 | EP0097604A2 Spaced button thrust surface for earth boring bit |
| 01/03/1984 | US4423646 Process for producing a rotary drilling bit |
| 12/27/1983 | CA1159443A1 Automatic depth compensating system |
| 12/27/1983 | CA1159441A1 Rotary bit with jet nozzles |
| 12/21/1983 | EP0096591A2 Drilling bit |
| 12/20/1983 | US4421184 Rock bit with improved shirttail ventilation |
| 12/20/1983 | CA1159047A1 Rotary drill bit for deep-well drilling |
| 12/13/1983 | US4420050 Oil well drilling bit |
| 12/13/1983 | CA1158636A1 Boring head |
| 12/13/1983 | CA1158635A1 Insert with locking projection |
| 11/30/1983 | EP0095134A2 Method and apparatus for drilling |
| 11/29/1983 | US4417629 Drill bit and method of manufacture |
| 11/22/1983 | US4416554 Thrust bearing for rock bits |
| 11/22/1983 | CA1157464A1 Bore undercutting tool |
| 11/22/1983 | CA1157463A1 Floating seal for earth boring bit |
| 11/22/1983 | CA1157462A1 Internal fluid screen to prevent nozzle and port plugging |
| 11/15/1983 | US4414734 Triad for rock bit assembly |
| 11/15/1983 | CA1157011A1 Nozzle retaining ring with crushed o-ring |
| 11/15/1983 | CA1157010A1 Self compensating seal apparatus |
| 11/15/1983 | CA1157009A1 Rotary drill bits and method of use |
| 11/08/1983 | US4413918 Thrust bearing for rock bits |
| 11/08/1983 | US4413689 Plural-part earth bit, and an improved bit head therefor |
| 11/01/1983 | US4412590 Rock bit internal lubricant pump |
| 10/25/1983 | US4411557 Method of making a high-capacity earthbound structural reference |
| 10/25/1983 | US4411324 Bore undercutting tool |
| 10/25/1983 | CA1155833A1 Hybrid rock bit |
| 10/18/1983 | US4410284 Composite floating element thrust bearing |
| 10/18/1983 | US4410055 Drilling tool |
| 10/11/1983 | US4408671 Roller cone drill bit |
| 10/11/1983 | US4408669 Means for drilling |
| 10/05/1983 | EP0090658A2 Abrasive bodies |
| 10/05/1983 | EP0090657A2 A method of making abrasive bodies |
| 10/04/1983 | US4407378 Nozzle retention method for rock bits |
| 10/04/1983 | US4407377 Surface controlled blade stabilizer |
| 10/04/1983 | US4407376 Under-reaming pile bore excavator |
| 10/04/1983 | US4407375 Pressure compensator for rotary earth boring tool |
| 10/04/1983 | CA1154752A1 Drill bit with dispersed cutter inserts |
| 10/04/1983 | CA1154751A1 Rock bit bearing pressure equalization system |
| 09/27/1983 | US4406500 Cutting assembly including expanding wall segments of auger |
| 09/27/1983 | US4406337 Insert with locking projection |
| 09/27/1983 | US4406336 Drilling bit |
| 09/27/1983 | US4406334 Drilling tool |
| 09/27/1983 | US4406332 Rotary earth boring tool |
| 09/27/1983 | CA1154430A1 Integral blade cylindrical gauge stabilizer-reamer |
| 09/20/1983 | US4405178 Cutter bit for a mining machine |
| 09/06/1983 | US4402639 Anchor bolt |
| 09/06/1983 | US4402617 Thin wall sintered bushing for a rock bit |
| 09/06/1983 | US4402372 Apparatus for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein |
| 09/06/1983 | US4402371 Rotatable drilling head |
| 09/06/1983 | CA1153360A1 Plunger lubricant compensator for an earth boring drill bit |
| 08/31/1983 | EP0087283A1 Rotary drilling bits |
| 08/30/1983 | US4401172 Drilling tool |
| 08/30/1983 | US4401171 Underreamer with debris flushing flow path |
| 08/30/1983 | US4401170 Apparatus for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein |
| 08/24/1983 | EP0086701A1 Drilling device |
| 08/23/1983 | US4400024 Nozzle retaining ring with crushed O-ring |
| 08/23/1983 | US4399879 Boring head |
| 08/23/1983 | US4399878 Lubricating device |
| 08/17/1983 | EP0086086A2 Cutting device, a tool including a cutting device and a method of making a cutting device |