| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 06/18/2002 | US6405813 Rock drill for drilling bores in reinforced concrete |
| 06/18/2002 | US6405812 Drilling tool for the air-lifting process |
| 06/18/2002 | US6405811 Solid lubricant for air cooled drill bit and method of drilling |
| 06/13/2002 | US20020071729 Ultra hard material cutter with shaped cutting surface |
| 06/13/2002 | US20020070053 High offset bits with super-abrasive cutters |
| 06/13/2002 | US20020070052 Reaming tool with radially extending blades |
| 06/13/2002 | US20020070051 Well bore reamer and method |
| 06/13/2002 | US20020070015 Down-hole tool hydraulic force intensifier |
| 06/13/2002 | US20020069725 Design method for drillout bi-center bits |
| 06/13/2002 | DE10146025A1 Pneumatische Felsbohrvorrichtung Pneumatic Felsbohrvorrichtung |
| 06/12/2002 | EP1212511A1 Method of mounting a tsp |
| 06/11/2002 | US6401845 Cutting element with stress reduction |
| 06/11/2002 | US6401844 Cutter with complex superabrasive geometry and drill bits so equipped |
| 06/11/2002 | US6401843 Drilling head with a cone rock bit |
| 06/11/2002 | US6401840 Method of extracting and testing a core from a subterranean formation |
| 06/11/2002 | US6401839 Roller cone bits, methods, and systems with anti-tracking variation in tooth orientation |
| 06/06/2002 | WO2002044511A1 Pneumatic rock-boring device and method for starting such a device |
| 06/06/2002 | WO2002044510A2 Seismic shothole reaming module |
| 06/06/2002 | WO2002044508A2 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium |
| 06/06/2002 | US20020066601 Rotary drill bits exhibiting sequences of substantially continuously variable cutter backrake angles |
| 06/06/2002 | US20020066600 Rotary tools or bits |
| 06/06/2002 | US20020066598 Steerable directional drilling reamer |
| 06/06/2002 | DE10053567A1 Vorrichtung zum Erzeugen einer Umfangsbohrung Means for generating a circumferential bore |
| 06/05/2002 | EP1210497A1 Bit connector |
| 06/05/2002 | EP1015727B1 Drilling tool |
| 06/05/2002 | CN2494425Y Multifunctional rock drill bit |
| 06/04/2002 | US6397959 Mill |
| 06/04/2002 | US6397958 Reaming apparatus and method with ability to drill out cement and float equipment in casing |
| 06/04/2002 | US6397956 Directional drilling tool |
| 05/30/2002 | WO2002042597A1 Drill bit |
| 05/30/2002 | WO2001098621A3 Centraliser |
| 05/30/2002 | US20020062996 Rotary contact structures and cutting elements |
| 05/30/2002 | US20020062995 Seismic shothole reaming module |
| 05/29/2002 | EP0937191B1 Rock drill |
| 05/29/2002 | CN1350915A Twist bits |
| 05/29/2002 | CN1350914A Rock drilling bits |
| 05/28/2002 | US6394717 High speed-perforating apparatus |
| 05/28/2002 | US6394202 Drill bit having diamond impregnated inserts primary cutting structure |
| 05/28/2002 | US6394201 Tubing spider |
| 05/28/2002 | US6394200 Drillout bi-center bit |
| 05/28/2002 | US6394199 Non-circular gauge reaming row inserts |
| 05/28/2002 | US6394198 Frictional vibration damper for downhole tools |
| 05/28/2002 | US6394197 Reverse circulation drilling system with bit locked underreamer arms |
| 05/23/2002 | WO2002040820A1 Percussive down-the-hole hammer for rock drilling, and a drill bit used therein |
| 05/23/2002 | WO2001079649A3 Apparatus and method for directional drilling |
| 05/23/2002 | WO2001077445B1 Method and device for the production of back-cut cavities |
| 05/23/2002 | WO2001073252A3 Rotatable cutting tool |
| 05/23/2002 | WO2001066900A3 Method and apparatus for directional boring under mixed conditions |
| 05/23/2002 | US20020060095 Drill bit for directional drilling |
| 05/22/2002 | EP0996808A4 Drill bit nozzle and method of attachment |
| 05/21/2002 | US6390212 Drill bit (b) |
| 05/21/2002 | US6390211 Variable orientation nozzles for earth boring drill bits, drill bits so equipped, and methods of orienting |
| 05/21/2002 | US6390210 Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty |
| 05/21/2002 | US6390209 Roller cone drill bit with improved pressure compensation |
| 05/21/2002 | US6390207 Method and apparatus for directional boring under mixed conditions |
| 05/21/2002 | US6390087 Drill bit for directional drilling |
| 05/16/2002 | WO2002020936A3 Drill bit |
| 05/15/2002 | EP0948701B1 Process and device for simultaneously drilling and lining a hole |
| 05/15/2002 | CN1349585A 磨料射流钻孔组装件 Abrasive jet drilling assembly |
| 05/14/2002 | US6386302 Polycrystaline diamond compact insert reaming tool |
| 05/14/2002 | US6386299 Method and apparatus for reaming pilot hole |
| 05/14/2002 | US6386298 Apparatus for directional drilling |
| 05/14/2002 | CA2055291C Disc drill bit |
| 05/09/2002 | US20020054799 Cutting tools for drilling concrete, aggregate, masonry or the like materials |
| 05/09/2002 | US20020053473 Head for a rock drill |
| 05/09/2002 | US20020053472 Twist-drill bit |
| 05/08/2002 | DE10053344A1 Gesteinsbohrer Rock drill |
| 05/08/2002 | DE10053342A1 Wendelbohrer Twist drill |
| 05/08/2002 | DE10052574A1 Lenkbare Erdrakete Steerable Erdrakete |
| 05/08/2002 | CN2490305Y Tooth form for tri-cone rotary drill bit |
| 05/08/2002 | CN1347797A Twist-drill for rock |
| 05/02/2002 | WO2002035051A1 Load responsive hydrodynamic bearing |
| 05/02/2002 | WO2002035050A1 Device for producing a peripheral hole |
| 05/02/2002 | WO2002035049A1 Steerable soil displacement hammer |
| 05/02/2002 | WO2001033027A3 Method for optimizing the bit design for a well bore |
| 05/02/2002 | US20020050409 Drill bit assembly having pivotal cutter blades |
| 05/02/2002 | US20020050408 Method and apparatus for enlarging well bores |
| 05/02/2002 | EP1201873A2 PDC bit with stress relief groove |
| 04/30/2002 | US6378632 Remotely operable hydraulic underreamer |
| 04/25/2002 | US20020046885 Rock drill |
| 04/25/2002 | US20020046884 Sealing structure for a rock drill bit |
| 04/24/2002 | CN2487859Y Sliding bearing for roller bit |
| 04/23/2002 | US6375706 Composition for binder material particularly for drill bit bodies |
| 04/23/2002 | US6375272 Rotatable cutting tool insert |
| 04/23/2002 | US6374932 Heat management drilling system and method |
| 04/23/2002 | US6374931 Multiple cutter rotary hammer bit |
| 04/23/2002 | US6374930 Cutting structure for roller cone drill bits |
| 04/18/2002 | WO2002031313A1 A drilling tool used in horizontal drilling applications |
| 04/18/2002 | US20020045059 High volume density polycrystalline diamond with working surfaces depleted of catalyzing material |
| 04/18/2002 | US20020043408 Drill bit for directional drilling |
| 04/18/2002 | US20020043407 Toughness optimized insert for rock and hammer bits |
| 04/18/2002 | US20020043406 Method and apparatus for directional boring under mixed conditions |
| 04/18/2002 | US20020043377 Garden auger and method re same |
| 04/17/2002 | EP1197630A1 Masonry drill bit |
| 04/17/2002 | CN2486727Y Tungsten carbide insert roller bit using orifice end face positioning mode mosaic tooth |
| 04/17/2002 | CN1344607A Bit of rock drilling machine |
| 04/17/2002 | CN1344606A Bit of rock drilling machine |
| 04/16/2002 | US6371226 Drag-type rotary drill bit |
| 04/16/2002 | US6371225 Drill bit and surface treatment for tungsten carbide insert |
| 04/11/2002 | WO2002029198A1 Cutting insert for percussion drill bit |