| Patents for E21B 10 - Drill bits (19,464) |
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| 10/29/2002 | US6470978 Fluid drilling system with drill string and retro jets |
| 10/29/2002 | CA2241150C Method and apparatus for forming piles in-situ |
| 10/29/2002 | CA2165852C Method and apparatus for providing a stream of inert gases in underbalanced drilling of a well bore |
| 10/24/2002 | US20020153174 Percussive rock drill bit and buttons therefor and method for manufacturing drill bit |
| 10/24/2002 | US20020153173 Percussion borer for forming bores in stone material |
| 10/24/2002 | US20020153172 Dual-seal drill bit pressure communication system |
| 10/24/2002 | US20020153171 Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty |
| 10/24/2002 | DE10119562A1 Schlagbohrwerkzeug für Gestein For percussion rock |
| 10/23/2002 | EP1251239A2 Drill bit having large diameter pdc cutters |
| 10/23/2002 | EP1251238A1 Percussion rock drill |
| 10/23/2002 | EP1015731B1 Cutting insert and milling tool for use in a wellbore |
| 10/23/2002 | CN1375614A Composite conic single gear drill bit |
| 10/22/2002 | US6469278 Hardfacing having coated ceramic particles or coated particles of other hard materials |
| 10/22/2002 | CA2067616C Device in hammer machines |
| 10/17/2002 | WO2002081856A1 Method for drilling and drilling apparatus |
| 10/17/2002 | US20020150430 Method and apparatus for forming piles in place |
| 10/17/2002 | US20020148649 Three cone rock bit with multi-ported non-plugging center jet nozzle and method |
| 10/17/2002 | US20020148326 For rock excavation; thermoconductivity |
| 10/15/2002 | US6464434 Cutting matrix and method applying the same |
| 10/15/2002 | US6464024 Bi-centered drill bit having improved drilling stability, mud hydraulics and resistance to cutter damage |
| 10/10/2002 | WO2002079604A2 Expandable downhole tool |
| 10/10/2002 | US20020144843 Drill bit having large diameter PDC cutters |
| 10/10/2002 | CA2442117A1 Expandable downhole tool |
| 10/09/2002 | EP1247787A1 Rotary seal for directional drilling tools |
| 10/09/2002 | EP1127477A4 Method and device in down-the-hole drilling |
| 10/09/2002 | EP1112433A4 Force-balanced roller-cone bits, systems, drilling methods, and design methods |
| 10/09/2002 | CN1373282A Combined drilling tool for drilling straight hole and boring |
| 10/08/2002 | US6461401 Alloy bound to tungsten carbide |
| 10/08/2002 | US6460637 Engineered enhanced inserts for rock drilling bits |
| 10/08/2002 | US6460636 Drill bit inserts with variations in thickness of diamond coating |
| 10/08/2002 | US6460635 Load responsive hydrodynamic bearing |
| 10/08/2002 | US6460631 Drill bits with reduced exposure of cutters |
| 10/08/2002 | CA2098581C Drill bit |
| 10/03/2002 | WO2002077407A1 Rock drill bits, methods, and systems with transition-optimized torque distribution |
| 10/03/2002 | WO2002077406A1 Percussion drill head |
| 10/03/2002 | WO2002077136A2 Improved concrete pile made of such a concrete and method for drilling a hole adapted for receiving the improved concrete pile in a weak ground |
| 10/03/2002 | WO2002057590A3 Backreamer |
| 10/03/2002 | US20020139585 Reverse circulation drilling system with bit locked underreamer arms |
| 10/03/2002 | US20020139584 Rotary seal for directional drilling tools |
| 10/02/2002 | DE10114429A1 Device for producing holes in bulk material, especially inhomogeneous refuse dumps, comprises a driven body having a cutting tool at its tip |
| 10/02/2002 | DE10112985A1 Schlagbohrkopf Impact drill head |
| 10/02/2002 | CN2514110Y Bound type small size bolt combined drilling tool |
| 10/02/2002 | CN2514109Y Rolling bearing rock roller bit |
| 10/02/2002 | CN2514108Y Rolling bearing rock roller bit |
| 10/02/2002 | CN2513746Y Concrete broaching bit capable of cooling and sectionally detaching |
| 10/01/2002 | US6458471 Reinforced abrasive-impregnated cutting elements, drill bits including same and methods |
| 10/01/2002 | CA2093847C Rock bit with improved gage insert |
| 09/27/2002 | CA2342262A1 Hole opener for earth boring |
| 09/26/2002 | US20020138240 Method and apparatus for predicting an operating characteristic of a rotary earth boring bit |
| 09/26/2002 | US20020134588 Hardsurfacing/hardfacing pertaining primarly to the horizontal directional drilling (HDD) industry utilizing technogenia |
| 09/25/2002 | EP1243747A1 Float apparatus for well drilling |
| 09/25/2002 | EP1242711A1 Drilling bit for drilling while running casing |
| 09/25/2002 | CN2512897Y Drilling bit with automatic core sampling device |
| 09/24/2002 | US6454030 Drill bits and other articles of manufacture including a layer-manufactured shell integrally secured to a cast structure and methods of fabricating same |
| 09/24/2002 | US6454029 Rotary boring bit and borer |
| 09/24/2002 | US6454028 Wear resistant drill bit |
| 09/24/2002 | US6454027 Toughness without sacrificing wear resistance; polycrystalline cubic boron nitride, cemented tungsten carbide |
| 09/24/2002 | US6454025 Apparatus for directional boring under mixed conditions |
| 09/24/2002 | US6454024 Replaceable drill bit assembly |
| 09/19/2002 | WO2002072994A1 Reamer |
| 09/19/2002 | US20020129944 Drillable floating equipment and method of eliminating bit trips by using drillable materials for the construction of shoe tracks |
| 09/19/2002 | CA2440273A1 Borehole opener |
| 09/19/2002 | CA2375906A1 Drillable floating equipment and method of eliminating bit trips by using drillable materials for the construction of shoe tracks |
| 09/18/2002 | CN1369349A Autoamtic argon arc welding method for annular welded seam of PDC drill |
| 09/18/2002 | CN1091159C Cemented carbide body with improved high temp and thermomechanical properties |
| 09/18/2002 | CN1091014C Composite cermet articles and method for making |
| 09/17/2002 | US6451442 Improved fracture toughness when compared to conventional cermet materials; hard first phase consisting of polycrystalline diamond, polycrystalline cubic boron nitride, and mixtures thereof; second and relatively softer phase struc |
| 09/17/2002 | US6450273 Drilling tool including drilling head with multiple cutting members separated drilled material grooves |
| 09/17/2002 | US6450271 Surface modifications for rotary drill bits |
| 09/17/2002 | US6450270 Rotary cone bit for cutting removal |
| 09/12/2002 | US20020125048 Drill bit having diamond impregnated inserts primary cutting structure |
| 09/12/2002 | US20020125047 Polycrystaline diamond compact insert reaming tool |
| 09/12/2002 | US20020124688 Thermal fatigue and shock-resistant material for earth-boring bits |
| 09/11/2002 | EP0808409B1 Cutter for a boring head |
| 09/11/2002 | EP0708872B1 Method and apparatus for controlling the head of a drilling or core-drilling device |
| 09/10/2002 | US6447560 Method for forming a superabrasive polycrystalline cutting tool with an integral chipbreaker feature |
| 09/10/2002 | US6446740 Cutting element with improved polycrystalline material toughness and method for making same |
| 09/10/2002 | US6446739 Rock drill bit with neck protection |
| 09/05/2002 | US20020121393 Mill/drill bit |
| 09/05/2002 | US20020121392 Method and apparatus for boring through a solid material |
| 09/05/2002 | US20020121391 Rock drilling tool |
| 09/04/2002 | EP1236861A1 Mill/drill bit |
| 09/04/2002 | EP1236553A1 Core drill |
| 09/04/2002 | EP1235971A1 Reamer shoe |
| 09/03/2002 | US6443249 Rotary drill bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics |
| 09/03/2002 | US6443248 Drill bit inserts with interruption in gradient of properties |
| 09/03/2002 | US6443247 Casing drilling shoe |
| 09/03/2002 | US6443246 Long barrel inserts for earth-boring bit |
| 09/02/2002 | CA2374086A1 Mill/drill bit |
| 08/29/2002 | WO2002066781A2 Metal-face-seal rock bit and lubricant passage for a rock bit |
| 08/29/2002 | WO2002066780A1 Drilling device with breaker insert |
| 08/29/2002 | DE10106695A1 Bohrkrone für einen Bohr- oder Injektionsanker Drill bit for drilling or injection anchor |
| 08/28/2002 | CN1366125A Rock drill having flushing hole |
| 08/28/2002 | CN1089845C Roll-slide combined bearing |
| 08/27/2002 | US6439327 Cutting elements for rotary drill bits |
| 08/27/2002 | US6439326 Centered-leg roller cone drill bit |
| 08/27/2002 | US6439323 Seismic shothole reaming module |
| 08/27/2002 | US6439319 Method and apparatus for directional boring under mixed conditions |
| 08/22/2002 | WO2002064939A1 Reamer having toroidal cutter body and method of use |
| 08/22/2002 | WO2002044510A3 Seismic shothole reaming module |