| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 06/11/1986 | EP0184460A2 Improved shaft sinking method |
| 06/11/1986 | EP0183899A1 Boring tool with radially oscillating/percussive and driven/rotating rollers |
| 06/10/1986 | US4593777 Drag bit and cutters |
| 06/10/1986 | US4593776 Rock bits having metallurgically bonded cutter inserts |
| 06/10/1986 | US4593775 Two-piece pressure relief valve |
| 06/10/1986 | US4593772 Rotary cutter for cable following apparatus |
| 06/03/1986 | US4592433 Cutting blank with diamond strips in grooves |
| 06/03/1986 | US4592252 Rolling cutters for drill bits, and processes to produce same |
| 05/28/1986 | EP0182770A1 Diamond drill bit |
| 05/28/1986 | EP0182759A1 Cemented carbide body used preferably for rock drilling and mineral cutting |
| 05/28/1986 | CN85201588U Rolling cutter bit with thrust bearing on which some spiral grooves machined |
| 05/27/1986 | US4591010 Coupling between a drill bit and a drill shaft |
| 05/27/1986 | US4591008 Lube reservoir protection for rock bits |
| 05/27/1986 | CA1205068A1 Downhole tool with replaceable tool sleeve sections |
| 05/20/1986 | US4589504 Well bore enlarger |
| 05/13/1986 | US4588309 Resilient bearing seal with ability to compensate for wear and compression set |
| 05/10/1986 | CN85108173A Hard alloy suitable for drilling rock and cutting ore |
| 05/06/1986 | US4586574 Cutter configuration for a gage-to-shoulder transition and face pattern |
| 05/06/1986 | US4586573 Rotary expansion tool for reaming frustoconical undercuts in the walls of cylindrical holes |
| 04/30/1986 | EP0179647A2 Panel heat exchangers |
| 04/24/1986 | WO1986002403A1 Method and apparatus for combined jet and mechanical drilling |
| 04/22/1986 | US4583604 Roller reamer with rotatably positioned bearing block |
| 04/22/1986 | CA1203529A1 Water separator and backflow valve |
| 04/15/1986 | US4582149 Drill bit having replaceable nozzles directing drilling fluid at a predetermined angle |
| 04/09/1986 | EP0177467A1 Drill steel |
| 04/09/1986 | EP0177466A2 Cutting element for drill bits |
| 04/09/1986 | EP0177209A2 Consolidation of a part from separate metallic components |
| 04/08/1986 | US4580642 Zero deviation drill bits |
| 04/08/1986 | CA1202955A1 Drill bit for jet assisted rotary drilling |
| 04/08/1986 | CA1202954A1 Compressible pressure compensator within closed lubricant volume of an earth boring apparatus |
| 04/08/1986 | CA1202953A1 Drill bit |
| 04/02/1986 | EP0176180A1 Hole opener |
| 04/01/1986 | US4579180 Drilling bit |
| 03/26/1986 | CN85200563U Drilling tool for bit replacing needing no drill lifting in position and divergent-convergent type |
| 03/25/1986 | US4577706 Rotary drill bits |
| 03/25/1986 | US4577705 Bellows lubricant pressurizer for sealed bearing rock bits |
| 03/25/1986 | CA1202297A1 Wound wire bearing |
| 03/18/1986 | US4576498 Assembly structure for a soil sampler |
| 03/11/1986 | US4574895 Earth boring bit |
| 03/10/1986 | CN85107342A Drill steel |
| 02/25/1986 | US4572307 Rock drill |
| 02/25/1986 | US4572306 Journal bushing drill bit construction |
| 02/19/1986 | EP0171915A1 Improvements in or relating to rotary drill bits |
| 02/19/1986 | EP0171899A1 Drill bit having angled nozzles for improved bit and well bore cleaning |
| 02/19/1986 | EP0171852A1 Rotary drill bit |
| 02/18/1986 | US4570726 Curved contact portion on engaging elements for rotary type drag bits |
| 02/18/1986 | US4570725 Drill bit cutter |
| 02/18/1986 | US4570723 Machine for driving holes in the ground |
| 02/12/1986 | EP0171038A2 Under reaming pile bore excavating bucket and method of its excavation |
| 02/11/1986 | US4569601 Wound wire bearing |
| 02/05/1986 | EP0170548A1 Drilling tools having a high cleaning efficiency at the work surface |
| 02/04/1986 | US4568227 Asymmetrical drill bit |
| 02/04/1986 | US4567954 Replaceable nozzles for insertion into a drilling bit formed by powder metallurgical techniques and a method for manufacturing the same |
| 01/29/1986 | EP0169718A2 Conical cutters for drill bits and processes to produce same |
| 01/29/1986 | EP0169717A2 Rolling cutters for drill bits, and processes to produce same |
| 01/29/1986 | EP0169683A2 Improvements in or relating to rotary drill bits |
| 01/29/1986 | EP0169448A1 Rock bit |
| 01/29/1986 | EP0169402A2 Rock drill bit |
| 01/22/1986 | EP0169110A1 Drilling tools with water passages for a highly efficient cleaning of the work surface |
| 01/22/1986 | EP0169081A2 Composite polycristalline diamond |
| 01/22/1986 | EP0168931A2 Process for producing a wear-resistant article |
| 01/21/1986 | US4565252 Borehole operating tool with fluid circulation through arms |
| 01/15/1986 | EP0168379A1 Drilling tool, especially a drill bit |
| 01/15/1986 | EP0034143B1 A rotary cutterhead for an earth boring machine |
| 01/14/1986 | CA1199184A1 Process for making diamond and cubic boron nitride compacts |
| 01/10/1986 | CN85100562A Pulsed jet regulation device for high pressure spray nozzle |
| 01/07/1986 | US4562892 Rolling cutters for drill bits |
| 01/07/1986 | CA1199051A1 Load bearing surface |
| 01/02/1986 | EP0166379A2 Brazed composite compact implement |
| 12/31/1985 | US4561508 Roller-reamer |
| 12/27/1985 | EP0165687A1 Cutter assembly |
| 12/24/1985 | US4560175 Hermetically welded belleville seal for rocks bits |
| 12/17/1985 | US4558754 Drill bit having angled nozzles |
| 12/17/1985 | US4558753 Drag bit and cutters |
| 12/11/1985 | EP0164297A2 Diamond drill bit with varied cutting elements |
| 12/11/1985 | EP0163727A1 Mining drill bit |
| 12/10/1985 | US4557609 Rotary drill bit |
| 12/10/1985 | CA1197866A1 Earthworking tool and method for protecting from abnormally high cutting loads |
| 12/10/1985 | CA1197837A1 Prevention of cone seal failures in rock bits |
| 12/04/1985 | EP0162981A1 Divided-bucket type rotary excavator |
| 11/27/1985 | EP0162107A1 Hybrid rock bit |
| 11/26/1985 | USRE32036 Drill bit |
| 11/26/1985 | US4555186 Refractory metal as essential component |
| 11/26/1985 | US4555064 Pebble-stone crushing device for use in excavator for laying pipelines underground |
| 11/26/1985 | US4554986 Rotary drill bit having drag cutting elements |
| 11/26/1985 | US4554985 Rotary drill bit |
| 11/19/1985 | US4554130 Consolidation of a part from separate metallic components |
| 11/19/1985 | US4553615 Rotary drilling bits |
| 11/12/1985 | US4552233 Rotary drill bit seal |
| 11/12/1985 | US4552232 Drill-bit with full offset cutter bodies |
| 11/12/1985 | US4552231 Rotating pilot core bit for use in highly fractured formations |
| 11/12/1985 | US4552228 Low pressure differential compensator |
| 11/05/1985 | US4551758 Image pick-up device and system |
| 11/05/1985 | US4550791 Two-prong rotary bit, especially for use with roof drills, and insert therefor |
| 11/05/1985 | US4550790 Diamond rotating bit |
| 11/05/1985 | US4550788 Roof bolt hole groover |
| 10/30/1985 | EP0159801A1 Spherical bit |
| 10/30/1985 | EP0159573A1 Process and device for the controlled advancing of under-ground pipes in inaccesible cross-sectional areas |
| 10/29/1985 | US4549820 Opposed button thrust surfaces for earth boring bits |
| 10/29/1985 | US4549616 Rock drill |