| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 05/31/2001 | WO2001038683A2 A method for the manufacturing of a drill bit for percussive rock drilling and a rock drill bit and buttons therefor |
| 05/30/2001 | EP0891239B1 Twist drill with asymmetrically spaced support margins |
| 05/30/2001 | CN2432325Y Hard alloyed tooth for drilling bit |
| 05/30/2001 | CN1297098A High-pressure water jet controllable spin drill bit |
| 05/25/2001 | WO2001036782A1 Drill bit with eccentric body |
| 05/25/2001 | WO2001036781A2 Drill head with a power generation device |
| 05/25/2001 | WO2001036163A1 Chisel |
| 05/23/2001 | EP1101013A1 Reverse circulation drilling system with bit locked underreamer arms |
| 05/23/2001 | EP0886715B1 Rock drill bit and a rock drilling tool |
| 05/23/2001 | DE10057124A1 Chisel for use with electro-pneumatic hammer drill has head and/or shaft with axial profiled apertures, ribs, or webs |
| 05/23/2001 | CN1295898A Drilling tool |
| 05/22/2001 | US6234261 Method of applying a wear-resistant layer to a surface of a downhole component |
| 05/17/2001 | DE19954315A1 Drilling tool especially for drilling rock has socket area for cutting plate and two opposing guide areas with guide section parallel to drilling direction but off-set by ninety degrees for accurate centring and alignment |
| 05/16/2001 | EP1099039A1 Drilling apparatus with a radially displaceable reamer as well as a reamer and a pilot bit |
| 05/15/2001 | US6230828 Rotary drilling bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics |
| 05/15/2001 | US6230827 Earth-boring drill bits with enhanced formation cuttings removal features and methods of drilling |
| 05/15/2001 | US6230826 Drilling apparatus an excavation bit |
| 05/15/2001 | US6230822 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 05/11/2001 | CA2325061A1 Drilling tool |
| 05/10/2001 | WO2001033031A1 Multiple cutter rotary hammer bit |
| 05/10/2001 | WO2001033027A2 Method for optimizing the bit design for a well bore |
| 05/10/2001 | US20010000885 Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability |
| 05/09/2001 | EP1098064A1 Auger drilling device |
| 05/09/2001 | EP1097288A1 Rotary cone drill bit with machined cutting structure and method |
| 05/09/2001 | CN1294044A High speed boring appts. |
| 05/08/2001 | US6227319 Superabrasive cutting elements and drill bit so equipped |
| 05/08/2001 | US6227318 Superhard material enhanced inserts for earth-boring bits |
| 05/08/2001 | US6227317 Garden auger having wings and cutters |
| 05/08/2001 | US6227316 Jet bit with variable orifice nozzle |
| 05/08/2001 | US6227315 Air jet earth-boring bit with non-offset cutters |
| 05/08/2001 | US6227314 Inclined leg earth-boring bit |
| 05/02/2001 | EP1096103A1 Drill-out bi-center bit |
| 05/02/2001 | EP1095203A1 Abrasive body |
| 05/02/2001 | EP1095202A1 Abrasive body |
| 05/02/2001 | EP1095201A1 Abrasive body |
| 05/01/2001 | US6223838 Auger system |
| 04/26/2001 | WO2001029374A1 Cutting tool for breaking hard material, and a cutting cap therefor |
| 04/26/2001 | WO2001029364A1 Underreamer and method of use |
| 04/26/2001 | WO2001029363A1 Method of drilling a borehole |
| 04/25/2001 | EP1093897A2 High speed-perforating apparatus |
| 04/25/2001 | EP1093405A1 Inserts and compacts having coated or encrusted cubic boron nitride particles |
| 04/24/2001 | US6220376 Drill bit and button |
| 04/24/2001 | US6220375 Polycrystalline diamond cutters having modified residual stresses |
| 04/24/2001 | US6220374 Rotary cone drill bit with enhanced thrust bearing flange |
| 04/24/2001 | US6220117 Methods of high temperature infiltration of drill bits and infiltrating binder |
| 04/24/2001 | CA2036602C Excavation tool |
| 04/18/2001 | CN1064733C Rock drilling tool, drill bit and method of transferring percussive energy |
| 04/17/2001 | US6216805 Dual grade carbide substrate for earth-boring drill bit cutting elements, drill bits so equipped, and methods |
| 04/12/2001 | US20010000224 Cutting tools for drilling concrete, aggregate, masonry or the like materials |
| 04/12/2001 | US20010000223 Cutting tools for drilling concrete, aggregate, masonry or the like materials |
| 04/11/2001 | EP1091083A1 Bi-center bit adapted to drill casing shoe |
| 04/11/2001 | CN1064433C Rotary cone drill bit modular arm and its use and producing method |
| 04/10/2001 | USRE37127 The hardfacing formulation in pre-application ratio comprises a qunatity of sintered a quantity of cast carbide pellets of chromium, molybdenum, niobium, tantalum, titanium, tungsten, vanadium carbides or alloys and balance of being matrix metal |
| 04/10/2001 | US6213232 Drilling tool helical shank formed from a polygonal profile bar |
| 04/10/2001 | US6213230 Drilling tool especially for the rotary percussion drilling of preferably rock |
| 04/10/2001 | US6213228 Roller cone drill bit with improved pressure compensation |
| 04/10/2001 | US6213225 Force-balanced roller-cone bits, systems, drilling methods, and design methods |
| 04/05/2001 | US20010000101 Reinforced abrasive-impregnated cutting elements, drill bits including same and methods |
| 04/04/2001 | EP0930949B1 Drill bit manufacturing method |
| 04/04/2001 | CN2426008Y Hydraulic rotary percussion drill bit |
| 04/04/2001 | CN2426007Y Open/close type tapered screw drill |
| 04/03/2001 | US6209668 Earth-boring bit with improved cutting structure |
| 04/03/2001 | US6209665 Reverse circulation drilling system with bit locked underreamer arms |
| 04/03/2001 | US6209660 Drill bit shear relief for horizontal directional drilling of rock formations |
| 04/03/2001 | US6209636 Wellbore primary barrier and related systems |
| 04/03/2001 | US6209420 Method of manufacturing bits, bit components and other articles of manufacture |
| 04/03/2001 | US6209185 Earth-boring bit with improved rigid face seal |
| 03/29/2001 | WO2001021930A1 Drilling apparatus |
| 03/29/2001 | WO2000066872A8 Abrasive jet drilling assembly |
| 03/28/2001 | EP1086292A1 A drilling tool |
| 03/27/2001 | US6206117 Drilling structure with non-axial gage |
| 03/27/2001 | US6206116 Rotary cone drill bit with machined cutting structure |
| 03/27/2001 | US6206115 Steel tooth bit with extra-thick hardfacing |
| 03/27/2001 | US6206114 Tool for transporting cutting means to and from a ground drill |
| 03/27/2001 | US6206110 Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit |
| 03/24/2001 | CA2320396A1 Improved rotary cone bit for cutting removal |
| 03/22/2001 | WO2001020083A1 Drilling tool and method of installing a foundation pile |
| 03/21/2001 | EP1085167A2 Polycrystaline diamond compact insert reaming tool |
| 03/21/2001 | EP1084324A1 Roller bit for tunnel-boring machines having replaceable bit points |
| 03/21/2001 | EP0871556B1 Composite cermet articles and method of making |
| 03/21/2001 | CN2424294Y Tri-cone rotary drill bit with sliding bushing bearing structure |
| 03/21/2001 | CN1287898A Drilling tool |
| 03/20/2001 | US6202772 Cutting element with canted design for improved braze contact area |
| 03/20/2001 | US6202771 Cutting element with controlled superabrasive contact area, drill bits so equipped |
| 03/20/2001 | US6202770 Superabrasive cutting element with enhanced durability and increased wear life and apparatus so equipped |
| 03/20/2001 | US6202769 Drilling stabilizer |
| 03/20/2001 | US6202768 Rock drilling tool and reamer for percussive drilling |
| 03/20/2001 | US6202766 Relief valve |
| 03/20/2001 | US6202752 Wellbore milling methods |
| 03/15/2001 | DE19942987A1 Bohrwerkzeug Drilling tool |
| 03/15/2001 | DE19942986A1 Bohrwerkzeug Drilling tool |
| 03/15/2001 | DE19942985A1 Bohrwerkzeug Drilling tool |
| 03/14/2001 | EP1083295A1 Drilling tool |
| 03/14/2001 | EP1083294A1 Drilling tool |
| 03/14/2001 | EP1083293A1 Drilling tool |
| 03/14/2001 | EP1083292A1 Interchangeable bit system for directional boring |
| 03/14/2001 | EP0870092B1 Method and apparatus for forming piles in-situ |
| 03/13/2001 | US6200685 Titanium molybdenum hafnium alloy |
| 03/13/2001 | US6199645 Engineered enhanced inserts for rock drilling bits |
| 03/13/2001 | US6199451 Tool having a tungsten carbide insert |