| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 01/08/2003 | EP1272730A1 Drill bit |
| 01/08/2003 | EP1272728A2 Apparatus and method for directional drilling |
| 01/08/2003 | EP1272711A1 Method and device for the production of back-cut cavities |
| 01/08/2003 | CN1098402C Cutting tool for drilling concrete, aggreate or masonry |
| 01/08/2003 | CN1098401C Rotary drill bit and indented cutter for rock drilling |
| 01/08/2003 | CN1098400C 旋转钻头 Rotary drill bits |
| 01/07/2003 | US6502650 Percussive down-the-hole hammer for rock drilling, and a drill bit used therein |
| 01/07/2003 | US6502649 Ice auger cutting head |
| 01/03/2003 | WO2003001022A1 Rock drilling tool, a ring drill bit and an adapter for percussive drilling |
| 01/03/2003 | WO2003001021A1 Method for rock boring |
| 01/03/2003 | WO2003001020A2 Monolithic roof bit cutting bit insert |
| 01/03/2003 | WO2001083934A3 Method for the manufacturing of a cone cutter for rotary drilling by crushing, a rotary cone drill bit, a cone cutter and crushing elements therefore |
| 01/02/2003 | EP1270869A1 Drilling and pressing tool |
| 01/02/2003 | EP1270868A1 A bi-centre bit for drilling out through a casing shoe |
| 01/02/2003 | EP1270162A1 Drill bit |
| 01/02/2003 | EP1270118A1 Cutting elements |
| 01/02/2003 | EP1268971A1 Back reamer |
| 01/02/2003 | EP1230465A4 Multiple cutter rotary hammer bit |
| 01/01/2003 | CN2528920Y Diamond rockbolt drill bit for mine |
| 12/31/2002 | US6499547 Multiple grade carbide for diamond capped insert |
| 12/27/2002 | WO2002066781A3 Metal-face-seal rock bit and lubricant passage for a rock bit |
| 12/27/2002 | WO2002002902A3 Improved rolling cutter lubrication arrangement |
| 12/26/2002 | US20020195279 Monolithic roof bit cutting bit insert |
| 12/26/2002 | US20020195277 Back reamer assembly |
| 12/26/2002 | US20020194955 Polycrystalline diamond carbide composites |
| 12/25/2002 | CN1386604A Auger drill |
| 12/19/2002 | US20020189865 Rock drill |
| 12/19/2002 | US20020189863 Drilling bit for drilling while running casing |
| 12/19/2002 | US20020189811 Roller pipe burster |
| 12/19/2002 | DE10129064A1 Gesteinsbohrwerkzeug Rock drilling |
| 12/18/2002 | EP1267033A1 Rock drilling tool |
| 12/18/2002 | EP1266125A2 Rotatable cutting tool |
| 12/18/2002 | CN2526491Y Composite tooth for roller bit |
| 12/18/2002 | CN2526490Y Special expanding drilling tool for screw drilling machine |
| 12/18/2002 | CN2526489Y Roller bit with auxiliary teeth |
| 12/18/2002 | CN2526488Y Roller bit for carburizing reinforced runner |
| 12/17/2002 | US6494276 Rock auger with pilot drill |
| 12/17/2002 | US6494275 Rock drill bit having retrac teeth and method for its manufacturing |
| 12/12/2002 | WO2002099243A1 Apparatus and method for rotary bored drilling |
| 12/12/2002 | WO2002099242A1 Drilling apparatus |
| 12/05/2002 | WO2002097231A1 Expandable drilling tool |
| 12/05/2002 | CA2545568A1 Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability |
| 12/04/2002 | EP1261798A2 Rock drill |
| 12/04/2002 | CN1382563A Straight bit for rock |
| 12/03/2002 | US6488106 Superabrasive cutting element |
| 12/03/2002 | US6488103 Drilling tool and method of using same |
| 11/28/2002 | US20020175006 Drill bits and other articles of manufacture including a layer-manufactured shell integrally secured to a cast structure and methods and molds for fabricating same |
| 11/27/2002 | EP1260338A2 Twist drill |
| 11/27/2002 | EP1259699A2 Rock drill |
| 11/27/2002 | EP1259698A1 Self-penetrating drilling method and thrust-generating tool for implementing same |
| 11/27/2002 | EP1259697A1 Rock drill bit and method for its manufacturing |
| 11/27/2002 | CN2522608Y Disposable series drill bit and joint for oil exploration and geologic prospecting probing rig |
| 11/27/2002 | CN2522607Y Gravel layer penetrated drill bit |
| 11/27/2002 | CN2522606Y Steel-tooth gear coated with wear-resistant alloy layer |
| 11/27/2002 | CN2522605Y Casing wing PDC drill bit |
| 11/27/2002 | CN2522604Y Plate-hammer-type chisel bit |
| 11/27/2002 | CN2522603Y One-cone rotary drill bit |
| 11/27/2002 | CN2522602Y Wave double-end surface elastic metal sealing ring of roller bit |
| 11/27/2002 | CN1094989C Rotary earth strata penetrating tool with cermet insert having Co-Ni-Fe binder |
| 11/26/2002 | US6484826 Engineered enhanced inserts for rock drilling bits |
| 11/26/2002 | US6484825 Cutting structure for earth boring drill bits |
| 11/26/2002 | US6484824 Failure indicator for rolling cutter drill bit |
| 11/26/2002 | US6484823 Rock drill bit and a check valve therefor |
| 11/26/2002 | US6484822 Cutting structure for earth boring drill bits |
| 11/26/2002 | US6484820 Method and device for driving bore-holes, especially in the sea bed, using a guide tip |
| 11/26/2002 | US6484819 Directional borehole drilling system and method |
| 11/26/2002 | CA2115543C Core cutter head |
| 11/21/2002 | WO2002092957A2 Drill bit |
| 11/21/2002 | US20020170752 Twist drill |
| 11/21/2002 | DE10122299A1 Horizontal directional drilling loads for rock and stone drilling, drill-head rotates one way only so one rock face segment is loaded with higher pressure by the leading cutter than remainder of the face, drill has leading and main cutters |
| 11/21/2002 | DE10031833C2 Diamantimprägnierte Erdbohrer und Verfahren zu deren Herstellung Impregnated diamond auger and processes for their preparation |
| 11/21/2002 | CA2571687A1 Drill bit |
| 11/20/2002 | EP1257723A1 Device for drilling, especially percussion or rotary percussion drilling, holes |
| 11/20/2002 | EP0925422B1 Apparatus and method for cutting a tubular in a wellbore |
| 11/20/2002 | CN2521373Y Coring bit body structure with inoculation insert diamond |
| 11/19/2002 | US6481511 Rotary drill bit |
| 11/19/2002 | US6481501 Method and apparatus for drilling and completing a well |
| 11/14/2002 | WO2002090707A2 Drilling device comprising a drive body with nozzles |
| 11/14/2002 | US20020166703 Reaming apparatus and method with enhanced structural protection |
| 11/14/2002 | US20020166702 Mounting attachment and bearing system for an industrial earth-boring cutter |
| 11/13/2002 | EP1255909A1 Drill bit, hard member, and bit body |
| 11/13/2002 | EP0985081B1 Method of manufacture of a rock drill |
| 11/13/2002 | EP0772726A4 Rotary drill bit and method for manufacture and rebuild |
| 11/13/2002 | CN2520407Y Rock roller bit having cone bottom plane with diverting slot |
| 11/13/2002 | CN2520406Y Double rock roller bit |
| 11/13/2002 | CN1094169C 一种凿岩钻头 One kind of rock drill |
| 11/13/2002 | CN1094168C 一种钻具 One kind of drill |
| 11/13/2002 | CN1094167C 具有固体润滑层的牙轮钻头 Cone drill bit with a solid lubricant layer |
| 11/07/2002 | WO2002088507A2 Roller cone bits with reduced packing |
| 11/07/2002 | WO2002087811A1 Abrasive tool inserts and their production |
| 11/07/2002 | US20020164215 Cutting or breaking tool as well as cutting insert for the latter |
| 11/07/2002 | US20020162692 Impact drill insert with frustum cutters |
| 11/07/2002 | US20020162691 Roller cone bits with wear and fracture resistant surface |
| 11/07/2002 | US20020162659 Reverse section milling method and apparatus |
| 11/07/2002 | DE10121564A1 Bohrvorrichtung mit einem Vortriebskörper mit Düsen Drilling device with a propulsion nozzle body with |
| 11/05/2002 | US6474425 Asymmetric diamond impregnated drill bit |
| 11/05/2002 | US6474424 Rotary cone drill bit with improved bearing system |
| 11/05/2002 | US6474423 Drill bit (A) |
| 10/31/2002 | US20020157873 Method for hardfacing roller cone drill bit legs |
| 10/31/2002 | US20020157869 Rock drill bits, methods, and systems with transition-optimized torque distribution |