| Patents for E21B 10 - Drill bits (19,464) |
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| 04/05/2006 | CN2769486Y Screw auger |
| 04/05/2006 | CN1756889A Aiguille blade assembly, drill pipe containing same and aiguille blade for self-drilling pole or anchor shaft |
| 04/05/2006 | CN1755061A Roller cone drill bits with optimized bearing structure |
| 04/04/2006 | CA2380539C A drill bit having large diameter pdc cutters |
| 03/30/2006 | WO2006033606A1 Rock drill bit |
| 03/30/2006 | US20060065447 Cutting elements and bits incorporating the same |
| 03/30/2006 | US20060065446 Rotary drill bit having cutting insert with a notch |
| 03/30/2006 | US20060065445 Rock-bit seals with asymmetric contact profiles |
| 03/30/2006 | CA2576681A1 Rock drill bit |
| 03/29/2006 | EP1332269B1 Device for producing a peripheral hole |
| 03/29/2006 | CN2767635Y Hole expansion abrasion drill |
| 03/29/2006 | CN2767634Y Collapse preventing hole enlarger for drilling through soft stratum by horizontal directional drill |
| 03/29/2006 | CN2767633Y Corrosion resistant roller bit nozzle assembly |
| 03/29/2006 | CA2514637A1 Cutting elements and bits incorporating the same |
| 03/28/2006 | US7020597 Methods for evaluating and improving drilling operations |
| 03/28/2006 | US7017683 Cutter for tunnel boring machine |
| 03/28/2006 | US7017677 Coarse carbide substrate cutting elements and method of forming the same |
| 03/28/2006 | CA2519745A1 Rock-bit seals with asymmetric contact profiles |
| 03/28/2006 | CA2289410C Superhard material enhanced inserts for earth-boring bits |
| 03/23/2006 | US20060060392 Thermally stable diamond polycrystalline diamond constructions |
| 03/23/2006 | US20060060391 Thermally stable diamond polycrystalline diamond constructions |
| 03/23/2006 | US20060060390 Thermally stable diamond polycrystalline diamond constructions |
| 03/23/2006 | US20060060389 Rock drill bit having outer and inner rock-crushing buttons |
| 03/23/2006 | US20060060388 Rock drill bit and a thread joint therefor |
| 03/23/2006 | US20060060387 Bit gage hardfacing |
| 03/23/2006 | US20060060385 Reverse-circulation drilling method and system |
| 03/23/2006 | US20060060384 Interchangeable reamer |
| 03/23/2006 | US20060060359 Metal face seal |
| 03/23/2006 | US20060059785 Protectively coating diamond particles with a chemically bound braze alloy containing a less reactive element, such as copper, zinc, tin, titanium, silicon, chromium, tungsten or zirconium, or carbides or nitrides therof; increased particle retention |
| 03/23/2006 | DE10106942B4 Pneumatisches Bodenstechwerkzeug mit beweglichem Meißelkopf Pneumatic floor grooving tool with movable cutter head |
| 03/22/2006 | EP1419308B1 Drilling tool |
| 03/22/2006 | CN2766023Y Improved hard alloy sheet for single-chisel bit |
| 03/22/2006 | CN1246115C Abrasive tool inserts and their production. |
| 03/21/2006 | US7013999 Wedge tooth cutter element for drill bit |
| 03/21/2006 | US7013998 Drill bit having an improved seal and lubrication method using same |
| 03/21/2006 | US7013997 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 03/21/2006 | CA2520319A1 Thermally stable diamond polycrystalline diamond constructions |
| 03/21/2006 | CA2077177C Modulated bias units for steerable rotary drilling systems |
| 03/16/2006 | US20060054363 Method for forming cutting elements |
| 03/16/2006 | US20060054362 Bit assembly for a hammering drill |
| 03/16/2006 | US20060054361 Two-cone drill bit with enhanced stability |
| 03/16/2006 | US20060054358 Coring bit with uncoupled sleeve |
| 03/16/2006 | US20060054357 Two-cone drill bit |
| 03/16/2006 | US20060054355 Nozzle bore for PDC bits |
| 03/16/2006 | DE102005022585A1 Boring header for ventilation lance, has connector opening and discharge opening, where fluid channel provided between connector opening and discharge opening runs through drill bit and boring shaft |
| 03/16/2006 | DE102004034763A1 Rock drill for drilling explosive holes in mining industry, has guidance area with inner core designed in single-piece with shaft and towing area, and outer guide bush fastened to core, where bush diameter is larger than shaft diameter |
| 03/15/2006 | EP1097288B1 Rotary cone drill bit with machined cutting structure and method |
| 03/15/2006 | CN2764920Y Directional drill bit |
| 03/14/2006 | US7011170 Increased projection for compacts of a rolling cone drill bit |
| 03/14/2006 | US7011169 Expanded coverage carbide compact |
| 03/14/2006 | CA2381528C Bit connector |
| 03/14/2006 | CA2258783C Method for measurement of the airflow in rock drill bits as well as measurement means for accomplishing said method |
| 03/14/2006 | CA2239734C Fluid drilling system |
| 03/10/2006 | CA2517761A1 Two-cone drill bit with enhanced stability |
| 03/10/2006 | CA2517754A1 Two-cone drill bit |
| 03/09/2006 | US20060048974 Guide frame for an earth drilling apparatus |
| 03/09/2006 | US20060048973 Rotary drill bits including at least one substantially helically extending feature, methods of operation and design thereof |
| 03/09/2006 | US20060048972 Pressure activated release member for an expandable drillbit |
| 03/09/2006 | US20060048604 Cemented carbide |
| 03/09/2006 | DE102004042195A1 Ground borer for positioning borings in ground, has lifting device fixed to drill bit and conveying coil, where lifting device enables drill bit with conveying coil to be moved perpendicularly upward over boring rod extension |
| 03/08/2006 | EP1632644A2 Method and apparatus for monitoring and recording of operating conditions of a downhole drill bit during drilling operations |
| 03/08/2006 | EP1632643A2 Method and apparatus for monitoring and recording of operating conditions of a downhole drill bit during drilling operations |
| 03/08/2006 | CN2763472Y Stabilizer for diamond drill |
| 03/08/2006 | CN2763462Y Expandable pipe bit |
| 03/08/2006 | CN2763461Y Combined day gun nail head for blast furnace |
| 03/08/2006 | CN2763460Y Roller bit adopting rolling ball locking bearing |
| 03/02/2006 | WO2006023851A1 Method of designing and drilling systems made using rock mechanics models |
| 03/02/2006 | WO2006023376A2 Indexable cutting inserts and methods for producing the same |
| 03/02/2006 | US20060042837 Maintaining carburized case during neutral to the core heat treatment processes |
| 03/02/2006 | DE112004000454T5 Bohrmeißelanordnung, Bohrstange mit der Bohrmeißelanordnung und Bohrerspitze zum Selbstbohren von Gestein oder Ankerbolzen A bit assembly, drill rod with the drill bit assembly and drill bit for self drilling rock bolt or anchor |
| 03/02/2006 | DE10205644B4 Bohrwerkzeug Drilling tool |
| 03/02/2006 | DE10112985B4 Schlagbohrkopf und ein Verfahren zum Horizontalbohren mit einem Schlaggerät Impact drill head and a method of horizontal drilling with a percussion device |
| 03/02/2006 | CA2577673A1 Method of designing and drilling systems made using rock mechanics models |
| 03/01/2006 | EP1628806A1 Polycrystalline diamond abrasive elements |
| 03/01/2006 | EP1628805A1 Polycrystalline diamond abrasive elements |
| 03/01/2006 | EP1002181B1 Drill bit directional nozzle |
| 03/01/2006 | CN2761809Y Torque groove cutting knife and anchored hole on building article |
| 03/01/2006 | CN2761808Y Expanding drill bit |
| 03/01/2006 | CN2761807Y Well drilling borehole expander for drilling |
| 03/01/2006 | CN2761806Y Safety anti-drop device of oil field well drilling expanding tool |
| 03/01/2006 | CN1742151A Attachment means for drilling equipment |
| 02/28/2006 | US7004267 Drill bit cone protector |
| 02/28/2006 | US7004265 Apparatus and methods for sponge coring |
| 02/28/2006 | US7004264 Bore lining and drilling |
| 02/28/2006 | CA2558703A1 Maintaining carburized case during neutral to the core heat treatment processes |
| 02/28/2006 | CA2516920A1 Maintaining carburized case during neutral to the core heat treatment processes |
| 02/28/2006 | CA2307627C Mill for use in a wellbore and method of milling |
| 02/23/2006 | WO2006019346A1 A rock drill bit and a thread joint |
| 02/23/2006 | WO2005094166A3 A ball-activated tool for use in a drill string |
| 02/23/2006 | US20060037786 Drill having construction suitable for enlarging previously formed hole |
| 02/23/2006 | US20060037785 Rotary Drill Bit |
| 02/23/2006 | US20060037783 Deep hole boring head and deep hole boring method for boring a production piece |
| 02/23/2006 | CA2576145A1 A rock drill bit and a thread joint |
| 02/22/2006 | EP1627985A1 Rotary drill bit |
| 02/22/2006 | EP1627130A1 Percussive drill bit, drilling system comprising such a drill bit and method of drilling a bore hole |
| 02/22/2006 | EP1627129A1 Drill bit, system, and method for drilling a borehole in an earth formation |
| 02/22/2006 | EP1627128A1 Stabilising band for a roller assembly |
| 02/22/2006 | CN2759709Y Pneumatic punching hammer used for horizontal directional drilling machine |
| 02/22/2006 | CN1738961A Wellstring assembly |
| 02/22/2006 | CN1242872C Sliding extension closed percussion bit |