| Patents for E21B 10 - Drill bits (19,464) |
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| 09/16/1992 | EP0503247A1 Drill for making holes with an undercutting |
| 09/16/1992 | EP0502938A1 Drilling bit irrigated by a fluid distributed by a fluidic oscillator. |
| 09/15/1992 | US5147001 Drill bit cutting array having discontinuities therein |
| 09/15/1992 | US5147000 Disc drill bit |
| 09/15/1992 | CA1307520C Drilling apparatus and cutter therefor |
| 09/15/1992 | CA1307519C Apparatus and method for installing a conduit with an arcuate bore |
| 09/10/1992 | DE4107678A1 Annular tooth load sensor for roller tunnelling tool - has measuring points and evaluator on drill head, with measuring points fitted with magnetic field sensors |
| 09/10/1992 | DE4107676A1 Roller tunnelling tool monitoring axle load measurement - forms load independent of over-roll signal from strain gauges, recessed into axle at measurement point under rollers |
| 09/09/1992 | EP0502610A1 Rotary drill bits and methods of designing such drill bits |
| 09/09/1992 | CN2115398U Radial slotted drill bits |
| 09/09/1992 | CN2115397U Cone-tooth wobbler drill bits |
| 09/08/1992 | US5145017 Kerf-cutting apparatus for increased drilling rates |
| 09/08/1992 | US5145016 Rock bit with reaming rows |
| 09/08/1992 | CA1307299C Erosion resistant cutting bit with hardfacing |
| 09/06/1992 | WO1992015451A1 Multibond hardfaced composites |
| 09/06/1992 | CA2105396A1 Multibond hardfaced composites |
| 09/03/1992 | WO1992014906A1 Improvements relating to drill bits |
| 09/02/1992 | EP0501447A1 Improved rock bit and compact inserts and method of manufacture |
| 09/02/1992 | EP0501258A1 Rotary rock bit with improved diamond filled compacts |
| 09/02/1992 | CN2114697U Percussion drill bit with leading ring |
| 09/01/1992 | US5143163 Digging tooth |
| 09/01/1992 | CA1307011C Rotatable cutting tool |
| 08/27/1992 | DE4105738A1 Rotary striker tool for rock drilling, - has hard metal points inclined in rotary direction and pivoted further inwards towards drilling tool axis |
| 08/25/1992 | US5141063 Restriction enhancement drill |
| 08/25/1992 | US5141062 Tool actuator |
| 08/19/1992 | CN2113334U Inclined nozzle of roller bit |
| 08/19/1992 | CN2113333U Springless impact rotary drill set for rope centering |
| 08/19/1992 | CN2113332U Unit assemblage apparatus for threaded rod drill set motor |
| 08/18/1992 | US5139099 Excavation tool |
| 08/18/1992 | US5139098 Combined drill and underreamer tool |
| 08/18/1992 | CA1306507C Process for laser hardfacing drill bit cones having hard cutter inserts |
| 08/12/1992 | EP0498781A1 Cemented carbide body |
| 08/12/1992 | CN1017818B Drill bit blade for masonry and rock drill |
| 08/11/1992 | US5137543 Tool insert; composite bonded to polymer support |
| 08/11/1992 | US5137097 Modular drill bit |
| 08/11/1992 | CA1306245C Drill bit with improved steerability |
| 08/11/1992 | CA1306242C Jetted drilling bit |
| 08/06/1992 | WO1992013169A1 Drilling bit for a rock drill with axial pressure and axial percussion |
| 08/06/1992 | DE4102794A1 Drill bit for hammer drill - has radial arms of zig-zag contour, fitted with hard metal tips |
| 08/06/1992 | CA2060551A1 Cemented carbide body with extra tough behaviour |
| 08/05/1992 | CN2111999U Expanding auger for mine and drilling |
| 08/04/1992 | US5135061 Cutting elements for rotary drill bits |
| 08/04/1992 | US5135058 Crane-mounted drill and method for in-situ treatment of contaminated soil |
| 08/04/1992 | CA1305958C Soil auger |
| 07/29/1992 | EP0496417A1 Method and apparatus for directing drilling fluid to the cutting edge of a cutter |
| 07/29/1992 | CN1063137A Diamond drilling tool used for complex stratum |
| 07/28/1992 | CA1305610C Diamond tools for rock drilling and machining |
| 07/25/1992 | CA2059727A1 Method and apparatus for directing drilling fluid to the cutting edge of a cutter |
| 07/23/1992 | DE4101458A1 Fuer einen mit axialem druck und schlaegen arbeitenden, umlaufenden gesteinsbohrer bestimmter bohrmeissel For an axial pressure and blows working, orbiting rock drill bit certain |
| 07/22/1992 | CN2110704U Dill bit for enlarging bottom of pouring pile |
| 07/21/1992 | US5132587 Spark plug electrodes |
| 07/21/1992 | US5131481 Insert having a surface of carbide particles |
| 07/21/1992 | US5131480 Rotary cone milled tooth bit with heel row cutter inserts |
| 07/21/1992 | US5131478 Low friction subterranean drill bit and related methods |
| 07/21/1992 | CA1305470C Flow through raise boring bit |
| 07/14/1992 | US5129471 Earth boring bit with protected seal means |
| 07/08/1992 | EP0493597A1 Device for fixing disk cutter to tunnel excavator |
| 07/07/1992 | US5127923 Cutting and drilling tools |
| 07/07/1992 | CA1304736C Rock bits and inserts therefor |
| 07/07/1992 | CA1304583C Abrasive product |
| 07/01/1992 | EP0492458A2 High speed rock bit |
| 07/01/1992 | EP0492457A2 Matrix diamond drag bit with PCD cylindrical cutters |
| 06/25/1992 | CA2048396A1 Outwardly mounted nozzles for rotary drill bits |
| 06/24/1992 | CN2108166U Dual pipe drilling tools with single acting local reverse recycle |
| 06/24/1992 | CN2108165U Multipurpose light driller |
| 06/22/1992 | WO1992011436A1 Drill bit |
| 06/22/1992 | CA2056011A1 High speed rock bit |
| 06/20/1992 | WO1992011438A1 Cold headed center vacuum drill bit |
| 06/20/1992 | WO1992011437A1 Insert having a surface of carbide particles |
| 06/20/1992 | CA2097065A1 Insert having a surface of carbide particles |
| 06/17/1992 | CN2107519U Pressing drill |
| 06/16/1992 | CA1303365C Temperature resistant abrasive polycrystalline diamond bodies |
| 06/10/1992 | CN2106886U Dry-type hollow drill bit of diamond |
| 06/10/1992 | CN2106885U Middle-length nozzle for roller bits |
| 06/10/1992 | CN1016949B Masonry drill tip with strong and chamfered cutting edges |
| 06/09/1992 | US5120327 Cutting composite formed of cemented carbide substrate and diamond layer |
| 06/09/1992 | US5119892 Notary drill bits |
| 06/09/1992 | US5119889 Tunneling drill bit |
| 06/09/1992 | US5119714 Rotary rock bit with improved diamond filled compacts |
| 06/03/1992 | EP0488623A2 Cutting insert for a rotary cutting tool |
| 06/03/1992 | EP0487531A1 Rotatable cutting tool |
| 06/03/1992 | EP0487523A1 An excavating tooth for an earth auger |
| 06/03/1992 | CN1061638A Spraying nozzle for gear drilling bit |
| 06/03/1992 | CN1061637A Hole-making rock drilling construction technology with diving electric drill to take rock core |
| 06/02/1992 | CA1302393C Drag bit for drilling in plastic formations with maximum chip clearance and hydraulics for direct chip impingement |
| 06/02/1992 | CA1302392C Gang drill construction |
| 05/27/1992 | EP0487355A1 Drill bit |
| 05/27/1992 | CN2105554U Screw drill transmission shaft assemblage apparatus |
| 05/27/1992 | CN1061457A Modular drill bit |
| 05/26/1992 | US5116568 Method for low pressure bonding of PCD bodies |
| 05/26/1992 | US5115875 Hammer drills for making boreholes |
| 05/26/1992 | US5115873 Method and appartus for directing drilling fluid to the cutting edge of a cutter |
| 05/21/1992 | DE4036193A1 Eccentric drive for rolling and milling drilling tool - has separate drive for fast-running eccentric and slow-running casing with adjustable counterweight in tool casing |
| 05/20/1992 | EP0485660A1 Coated superabrasive grit and use of same |
| 05/20/1992 | CN2104925U Bit of gear wheel |
| 05/20/1992 | CN2104924U Reiterative-blades bit |
| 05/20/1992 | CN2104923U Reversely cycling continuous core bit withthrough submersible hole hammer |
| 05/20/1992 | CN1016711B Hard alloy suitable for drilling rock and cutting ore |
| 05/19/1992 | US5113954 Excavation tool |
| 05/19/1992 | US5113952 Auger planter method |