| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 05/26/2004 | CN1500175A Method for drilling and drilling appts. |
| 05/26/2004 | CN1500023A Abrasive tool inserts and their prodn. |
| 05/25/2004 | US6739417 Superabrasive cutters and drill bits so equipped |
| 05/25/2004 | US6739416 Enhanced offset stabilization for eccentric reamers |
| 05/25/2004 | US6739411 Hollow auger head assembly |
| 05/25/2004 | US6739214 Polycrystalline diamond partially depleted of catalyzing material |
| 05/21/2004 | WO2004042184A1 An improved rotary roller reamer |
| 05/21/2004 | WO2004042183A1 A reamer assembly |
| 05/21/2004 | CA2720411A1 An improved rotary roller reamer |
| 05/21/2004 | CA2503815A1 A reamer assembly |
| 05/20/2004 | US20040094334 Blunt faced cutter element and enhanced drill bit and cutting structure |
| 05/19/2004 | EP1419308A1 Drilling tool |
| 05/19/2004 | CN2616655Y Automatic reducing and broaching drilling tool |
| 05/19/2004 | CN1496803A Brick or rock boring tool |
| 05/19/2004 | CN1496791A Pointed tap-hole rod |
| 05/18/2004 | US6736226 Method and apparatus for boring through a solid material |
| 05/13/2004 | WO2004040096A1 Composite tool insert |
| 05/13/2004 | WO2004040095A1 Tool insert |
| 05/13/2004 | WO2004040029A1 Composite material |
| 05/13/2004 | US20040089476 Drill for boring anchor fixing hole |
| 05/13/2004 | CA2504237A1 Composite material |
| 05/12/2004 | EP1418309A2 Drill bit for percussive drilling |
| 05/12/2004 | EP0775246B1 Rotary cone drill bit with improved support arms |
| 05/11/2004 | US6733378 Abrasive body |
| 05/11/2004 | US6732820 Method and apparatus for boring through a solid material |
| 05/11/2004 | US6732817 Expandable underreamer/stabilizer |
| 05/06/2004 | WO2004038165A1 Three cone rock bit with multi-ported non-plugging center jet nozzle and method |
| 05/06/2004 | WO2004000543A8 Self sharpening polycrystalline diamond compact with high impact resistance |
| 05/06/2004 | US20040084225 Self-retaining downhole-hammer drill bit |
| 05/06/2004 | US20040084224 Bore hole opener |
| 05/06/2004 | US20040084223 Cutting element having enhanced cutting geometry |
| 05/06/2004 | US20040084222 Alternating inclinations of compacts for drill bit |
| 05/06/2004 | US20040084183 Wedge activated underreamer |
| 05/06/2004 | EP1415065A1 Drill crown |
| 05/06/2004 | EP1415064A1 Drilling apparatus |
| 05/06/2004 | EP0920568B1 Cutting element tip configuration for an earth-boring bit |
| 05/06/2004 | DE202004001293U1 Deep boring system has two diametrically opposite cutting blades on a rotating mounting inside an outer grip sleeve with radial grip bars to secure in the bore |
| 05/06/2004 | DE10249564A1 Topfförmiger Gesteinsbohrkopf Pot-shaped rock drill |
| 05/06/2004 | DE10053567B4 Bohrwerkzeug und Vorrichtung zum Erzeugen einer Umfangsbohrung A drilling tool and means for generating a circumferential bore |
| 05/04/2004 | US6729420 Multi profile performance enhancing centric bit and method of bit design |
| 05/04/2004 | US6729418 Back reaming tool |
| 05/04/2004 | CA2210442C A cutter head, boring jig and device and process for sea bottom boring |
| 04/29/2004 | US20040079556 Concrete drill |
| 04/29/2004 | US20040079554 Cup-shaped rock drill head |
| 04/28/2004 | EP1413403A1 Pointed chisel |
| 04/28/2004 | EP1099039B1 Drilling apparatus with a radially displaceable reamer as well as a reamer and a pilot bit |
| 04/28/2004 | CN2613583Y Rolling bearing with automatic gap eliminating device for roller bit |
| 04/27/2004 | US6725953 Drill bit having diamond impregnated inserts primary cutting structure |
| 04/27/2004 | US6725952 Bowed crests for milled tooth bits |
| 04/22/2004 | WO2004033846A1 Rotary mine drilling bit for making blast holes |
| 04/22/2004 | WO2004013449A3 Device for advancing drillings in the ground |
| 04/22/2004 | US20040074672 Reamer having toridal cutter body and method of use |
| 04/22/2004 | CA2500488A1 Rotary mine drilling bit for making blast holes |
| 04/21/2004 | EP1409836A2 Metal-face-seal rock bit and lubricant passage for a rock bit |
| 04/21/2004 | CN2612791Y Reaming bit |
| 04/21/2004 | CN1490472A Plate guided bucket boring process for site casting foundation piles |
| 04/21/2004 | CN1490471A Plate guided bucket excavator |
| 04/20/2004 | US6722559 Apparatus and method for mitigating wear in downhole tools |
| 04/20/2004 | US6722454 Device for drilling, in particular percussion drilling or rotary percussion drilling, boreholes |
| 04/20/2004 | US6722452 Pantograph underreamer |
| 04/20/2004 | CA2208313C Improved segmented cutting tools |
| 04/15/2004 | US20040069540 Drill bit |
| 04/15/2004 | US20040069539 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 04/15/2004 | US20040069534 Multi-stage diffuser nozzle |
| 04/15/2004 | US20040069533 Pneumatic rock-boring device and method for starting such a device |
| 04/15/2004 | US20040069531 Earth boring apparatus and method offering improved gage trimmer protection |
| 04/15/2004 | US20040069292 Point chisel |
| 04/14/2004 | EP1407110A1 Steerable rotary drill bit assembly with pilot bit |
| 04/14/2004 | EP1283936A4 Cutting tool and method of using same |
| 04/14/2004 | EP1153193B1 Directional drilling apparatus |
| 04/14/2004 | EP1086292B1 A drilling tool |
| 04/14/2004 | EP1023520B1 Partially enhanced drill bit |
| 04/14/2004 | CN2611572Y Combined rock drill |
| 04/14/2004 | CN2611571Y Bit for drilling pump pouring concrete and forming pile by jetting slurry expanding bottom |
| 04/13/2004 | US6719074 Insert chip of oil-drilling tricone bit, manufacturing method thereof and oil-drilling tricone bit |
| 04/13/2004 | US6719073 Single-cone rock bit having cutting structure adapted to improve hole cleaning, and to reduce tracking and bit balling |
| 04/08/2004 | WO2004029402A1 Combined reamer and drill bit stabiliser |
| 04/08/2004 | WO2004029401A1 One-step directional coring or drilling system |
| 04/08/2004 | WO2004029310A2 Molten braze-coated superabrasive particles and associated methods |
| 04/08/2004 | WO2004028746A2 Brazed diamond tools and methods for making the same |
| 04/08/2004 | US20040067724 Authentication system and method using demographic data supplied by third party |
| 04/08/2004 | US20040065483 Roof bit carbide blade |
| 04/08/2004 | US20040065482 Rock drill bit and method for the manufacture thereof |
| 04/08/2004 | US20040065481 Rotary mine drilling bit for making blast holes |
| 04/08/2004 | US20040065480 Bore hole underreamer |
| 04/08/2004 | US20040065479 Bore hole underreamer having extendible cutting arms |
| 04/08/2004 | DE10244509A1 Spitzmeissel Chisels |
| 04/07/2004 | EP1405984A1 Masonry drilling tool |
| 04/07/2004 | EP1404941A1 Well drilling bit |
| 04/01/2004 | WO2004027206A1 Rotary boring bit with cutting insert retaining means |
| 04/01/2004 | US20040060742 High-strength, high-toughness matrix bit bodies |
| 04/01/2004 | US20040060741 Hole-opener for enlarging pilot hole |
| 04/01/2004 | US20040060740 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium |
| 04/01/2004 | US20040060710 Internal pressure indicator and locking mechanism for a downhole tool |
| 03/31/2004 | EP1402146A1 Earth drilling device |
| 03/31/2004 | CN2608670Y Rotary guiding well drillnig PDC solid borer |
| 03/30/2004 | US6712163 Rock drilling tool |
| 03/30/2004 | US6711969 Methods for designing rotary drill bits exhibiting sequences of substantially continuously variable cutter backrake angles |
| 03/30/2004 | CA2357476C Ultra hard material cutter with shaped cutting surface |
| 03/27/2004 | CA2442198A1 High-strength, high-toughness matrix bit bodies |