| Patents for E21B 10 - Drill bits (19,464) |
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| 06/18/2009 | WO2009046075A3 Drill bits and tools for subterranean drilling |
| 06/18/2009 | US20090152018 Polycrystalline diamond compacts, and related methods and applications |
| 06/18/2009 | US20090152017 Polycrystalline diamond construction with controlled gradient metal content |
| 06/18/2009 | US20090152016 Cutting elements and bits incorporating the same |
| 06/18/2009 | US20090152015 Superabrasive materials and compacts, methods of fabricating same, and applications using same |
| 06/18/2009 | US20090152013 Erosion resistant fluid passageways and flow tubes for earth-boring tools, methods of forming the same and earth-boring tools including the same |
| 06/18/2009 | US20090152012 Microtunnelling system and apparatus |
| 06/18/2009 | US20090152011 Downhole Drive Shaft Connection |
| 06/18/2009 | US20090152010 Microtunnelling system and apparatus |
| 06/18/2009 | DE102007060410A1 Horizontal drilling device has drill head which contains base body and displaced bolt, where bolt is displaced from retracted position to another position in which bolt projects out of base body in bore direction |
| 06/18/2009 | DE102007060409A1 Horizontal earth drilling device, has drilling head, and linear drive for drilling head, where drilling head exhibits heating element that heats earth surrounding head and arranged between drilling head front part and drilling cap collar |
| 06/17/2009 | EP2070618A1 Core drill for stone |
| 06/17/2009 | CN201258693Y Diamond compact deflecting bit |
| 06/17/2009 | CN201258692Y Cemented carbide cutting edge drill sheet and drill bit employing same |
| 06/17/2009 | CN201258691Y PDC drill suitable for drilling high abrasiveness strata |
| 06/17/2009 | CN201258690Y Equally-grinding side force balancing drill |
| 06/17/2009 | CN201258689Y Single tube coring bit |
| 06/17/2009 | CN201258688Y Well drilling and coring dual-purpose drill for gas hydrate |
| 06/17/2009 | CN101460695A Multi-sectional percussive drill bit assembly |
| 06/17/2009 | CN101460694A Multi-sectional percussive drill bit assembly |
| 06/16/2009 | US7546888 Percussive drill bit |
| 06/16/2009 | US7546887 Method and device for producing a borehole in the soil |
| 06/11/2009 | WO2009073495A1 Method and apparatus to improve design, manufacture, performance and/or use of well tools |
| 06/11/2009 | WO2003001020A3 Monolithic roof bit cutting bit insert |
| 06/11/2009 | US20090145669 Drill Bit Cutting Structure and Methods to Maximize Depth-0f-Cut For Weight on Bit Applied |
| 06/11/2009 | US20090145668 Impregnated rotary bit |
| 06/11/2009 | US20090145667 Active stabilization during cutting for hole opening tools |
| 06/11/2009 | US20090145666 Expandable stabilizer with roller reamer elements |
| 06/11/2009 | US20090145663 Drill Bit Having Enhanced Stabilization Features |
| 06/11/2009 | CA2708034A1 Method and apparatus to improve design, manufacture, performance and/or use of well tools |
| 06/10/2009 | EP2066864A1 Methods for applying wear-resistant material to exterior surfaces of earth-boring tools and resulting structures |
| 06/10/2009 | CN201254953Y Loose strata original sample core drill tool |
| 06/10/2009 | CN101454533A Cutting structure for earth-boring bit to reduce tracking |
| 06/10/2009 | CN101451426A Drill bit |
| 06/10/2009 | CN100497878C Automatic anti-oblique well drilling tool |
| 06/09/2009 | US7543662 Stress-relieved diamond inserts |
| 06/09/2009 | US7543661 Roller cone bits with wear and fracture resistant surface |
| 06/09/2009 | US7543660 Roller cone drill bit with debris diverter plugs |
| 06/05/2009 | CA2644715A1 Active stabilization during cutting for hole opening tools |
| 06/04/2009 | WO2009070372A2 Minimizing stick-slip while drilling |
| 06/04/2009 | WO2009069903A2 Apparatus and method for excavating vertical hole |
| 06/04/2009 | WO2009055199A3 Morphible bit |
| 06/04/2009 | WO2009046379A3 Nozzle having a spray pattern for use with an earth boring drill bit |
| 06/04/2009 | US20090142594 Erosion resistant surface and method of making erosion resistant surfaces |
| 06/04/2009 | US20090139773 Percussive drill bit for rock drilling and method for the manufacture of such a drill bit |
| 06/04/2009 | US20090139772 Diametrically expanded groove cutting apparatus and expandable mechanism |
| 06/04/2009 | DE102007057541A1 Widening device for e.g. widening ground bores, has nozzle ring attached at water supply tube, and pull rods having holding ring, joint sleeve, brake levers and holding shoes arranged between water supply tube and product pipe |
| 06/04/2009 | CA2677785A1 Minimizing stick-slip while drilling |
| 06/03/2009 | EP2065550A1 Micropore engagement surface for earth boring bit |
| 06/03/2009 | CN201250610Y Self-guided drill bit |
| 06/03/2009 | CN201250609Y Negative-pressure cyclic rotating and impacting combined drill bit with built-in power |
| 06/03/2009 | CN101449020A High density row on roller cone bit |
| 06/02/2009 | US7541090 Dual-phase hard material comprising tungsten carbide, process for the production thereof and its use |
| 06/02/2009 | US7540341 Drill bit |
| 06/02/2009 | US7540340 Cutting element having enhanced cutting geometry |
| 06/02/2009 | CA2567025C Modular system for a back reamer |
| 05/28/2009 | WO2009067650A2 Seal with abrasive particles for roller cone bit bearing |
| 05/28/2009 | WO2009067073A1 Percussive drill bit for rock drilling and method for the manufacture of such drill bit |
| 05/28/2009 | WO2009066907A2 Drill body with air-hammer for inducing reverse circulation effectively and drilling method using the same |
| 05/28/2009 | WO2009065575A2 Adjustable drill bit |
| 05/28/2009 | WO2009065523A2 Self-circulating drill bit |
| 05/28/2009 | WO2008144036A3 Method of repairing diamond rock bit |
| 05/28/2009 | US20090138242 Minimizing stick-slip while drilling |
| 05/28/2009 | US20090133938 Thermally Stable Pointed Diamond with Increased Impact Resistance |
| 05/28/2009 | US20090133937 Cutting tools and methods of making the same |
| 05/28/2009 | US20090133929 Method, Drilling Machine, Drill bit and Bottom Hole Assembly for Drilling by Electrical Discharge by Electrical Discharge Pulses |
| 05/28/2009 | CA2705737A1 Percussive drill bit for rock drilling and method for the manufacture of such a drill bit |
| 05/27/2009 | EP2061947A2 Roller cone drill bits with improved fluid flow |
| 05/27/2009 | CN201246110Y Down-hole drill head |
| 05/27/2009 | CN201246109Y Corrugated turbo teeth diamond bit |
| 05/27/2009 | CN201246108Y Ball teeth-shaped diamond composite sheet substrate |
| 05/27/2009 | CN201246107Y Roller bit |
| 05/27/2009 | CN201246106Y Drill bucket with forced soil unloading function |
| 05/27/2009 | CN101440696A Expanding drill for high voltage line iron tower foundation construction |
| 05/27/2009 | CN101440695A Roller bit of spiral teeth |
| 05/27/2009 | CN100491690C Rotary excavating extruding expanding drilling machine and its working method |
| 05/27/2009 | CN100491689C Rotary excavating extruding expanding drilling machine and its working method |
| 05/26/2009 | US7537067 Rotary claw bit |
| 05/26/2009 | CA2426544C Percussive down-the-hole hammer for rock drilling, and a drill bit used therein |
| 05/22/2009 | WO2009064969A1 Hybrid drill bit and design method |
| 05/22/2009 | WO2009064967A1 Earth-boring tools attachable to a casing string and methods for their manufacture |
| 05/22/2009 | WO2008157110A4 Cutting element for subterranean drilling |
| 05/22/2009 | CA2705825A1 Hybrid drill bit and design method |
| 05/22/2009 | CA2705565A1 Earth-boring tools attachable to a casing string and methods for their manufacture |
| 05/21/2009 | US20090127002 Roller cone bit bearing with elastomeric seal having self break-in property |
| 05/21/2009 | US20090126998 Hybrid drill bit and design method |
| 05/20/2009 | EP1805389B1 Polycrystalline cutter with multiple cutting edges |
| 05/20/2009 | CN201241626Y Deviation bit inlaid with diamond |
| 05/20/2009 | CN201241625Y Dual-purpose boring tool |
| 05/20/2009 | CN201241624Y Alloy drill |
| 05/20/2009 | CN101435316A Broken formation coring tool |
| 05/19/2009 | US7533740 Thermally stable polycrystalline diamond cutting elements and bits incorporating the same |
| 05/19/2009 | US7533739 Cutting element apparatuses and drill bits so equipped |
| 05/19/2009 | US7533738 Insert in a downhole drill bit |
| 05/19/2009 | US7533737 Jet arrangement for a downhole drill bit |
| 05/19/2009 | CA2557947C Improved nozzle bore for pdc bits |
| 05/14/2009 | WO2009061766A2 Methods and apparatuses for forming cutting elements having a chamfered edge for earth-boring tools |
| 05/14/2009 | WO2009061765A1 Earth-boring tools with primary and secondary blades, methods of forming and designing such earth-boring tools |
| 05/14/2009 | WO2008060212A8 A drilling tool, a self -drilling rock bolt, a drill bit, an ancoring device for a self -drilling rock bolt, a shaft for a drilling tool and an end coupling for a drilling tool |
| 05/14/2009 | US20090120693 Earth-boring tools attachable to a casing string and methods for their manufacture |