| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 06/20/2000 | US6076618 Rock drilling tool with radially extendable two-piece reamer |
| 06/15/2000 | WO2000034002A1 Method for applying hardfacing material to a steel bodied bit and bit formed by such a method |
| 06/15/2000 | WO2000034001A1 Microwave brazing process and brazing composition for tsp diamond |
| 06/15/2000 | DE19857451A1 Schneid- oder Brechwerkzeug sowie Schneideinsatz für dieses Cutting or breaking tool and cutting insert for this |
| 06/14/2000 | EP1008721A1 Cutting or crushing tool and cutting insert therefor |
| 06/14/2000 | EP1008718A2 Rotary drag-type drill bits and methods of designing such bits |
| 06/14/2000 | EP1007818A1 Rock drill bit |
| 06/14/2000 | CN2382830Y 滚滑复合轴承 Rolling and sliding composite bearings |
| 06/14/2000 | CN2382755Y Pile hole drill bucket of bored concrete pile |
| 06/14/2000 | CN1053409C Method for making diamond tool containing surface-metallized ceramic phase |
| 06/13/2000 | US6073711 Partially enhanced drill bit |
| 06/13/2000 | US6073518 Bit manufacturing method |
| 06/08/2000 | WO2000012860A3 Roller-cone bits, systems, drilling methods, and design methods with optimization of tooth orientation |
| 06/08/2000 | WO2000012859A3 Force-balanced roller-cone bits, systems, drilling methods, and design methods |
| 06/07/2000 | EP1006257A2 A drag-type Rotary Drill Bit |
| 06/07/2000 | EP1006256A2 A method of determining the walk rate of a rotary drag-type drill bit |
| 06/07/2000 | CN2381764Y Nozzle of drill bit |
| 06/07/2000 | CN2381763Y Gravity opening drill bit for drilling or boring |
| 06/06/2000 | US6070677 Method and apparatus for enhancing production from a wellbore hole |
| 06/06/2000 | US6070665 Wellbore milling |
| 06/04/2000 | CA2291747A1 Drag-type rotary drill bit |
| 06/02/2000 | WO2000031371A1 Downhole tool with extendable members |
| 05/31/2000 | DE19854813A1 Drill crown for rotary percussive drill rod has crown inner part surrounded concentrically by crown outer part, with crown inner part axially displaceably and non-rotatively connected with rotary percussive drill rod |
| 05/31/2000 | CN2380678Y Impact drill capable of opening |
| 05/31/2000 | CN2380677Y Hybrid drill |
| 05/30/2000 | US6068913 Intermediate layer being configured for nesting between the projections of the substrate and being bonded thereto |
| 05/30/2000 | US6068072 Cutting element |
| 05/30/2000 | US6068071 Cutter with polycrystalline diamond layer and conic section profile |
| 05/30/2000 | US6068070 Diamond enhanced bearing for earth-boring bit |
| 05/30/2000 | CA2169995C Cutter bit |
| 05/24/2000 | EP1002182A1 Roller cone drill bit with lubricant pressure compensating device |
| 05/24/2000 | EP1002181A1 Drill bit directional nozzle |
| 05/24/2000 | EP0784732A4 Fixed-cutter drill bit assembly and method |
| 05/24/2000 | CN1254051A Excavating tool |
| 05/24/2000 | CN1052774C Rock drill bit and cutting insert |
| 05/24/2000 | CN1052773C Gage surface and method for milled tooth cutter |
| 05/23/2000 | US6065683 Method and apparatus for conditioning fluid flow |
| 05/23/2000 | US6065554 Preform cutting elements for rotary drill bits |
| 05/23/2000 | US6065553 Split blade rotary drag type drill bits |
| 05/23/2000 | US6065552 Cutting elements with binderless carbide layer |
| 05/23/2000 | US6065551 Method and apparatus for rotary mining |
| 05/23/2000 | CA2128071C Cutting member for material removal tool |
| 05/16/2000 | US6063502 First structural phase of hard material such as cermets, polycrystalline diamond or cubic boron nitride, or their mixtures, and second structural phase of different material; ordered microstructure; fracture toughness; use in drill bits |
| 05/16/2000 | US6062325 Rotary drill bits |
| 05/11/2000 | WO2000026576A1 Method and device in down-the-hole drilling |
| 05/11/2000 | WO2000026498A1 Retractable drill bit system |
| 05/11/2000 | WO2000026497A1 Roller reamer |
| 05/11/2000 | CA2348297A1 Retractable drill bit system |
| 05/10/2000 | CN1052292C Cutting device for making a slot in an underground formation |
| 05/09/2000 | US6059054 Non-symmetrical stress-resistant rotary drill bit cutter element |
| 05/09/2000 | US6059053 Retraction system for a latching mechanism of a tool |
| 05/09/2000 | US6059051 Integrated directional under-reamer and stabilizer |
| 05/03/2000 | EP0996810A1 Reverse circulation drilling system with bit locked underreamer arms |
| 05/03/2000 | EP0996809A2 Rotatable cutting bit assembly with cutting inserts |
| 05/03/2000 | EP0996808A1 Drill bit nozzle and method of attachment |
| 05/03/2000 | EP0996807A1 Rotatable cutting bit assembly with wedge-lock retention assembly |
| 05/03/2000 | EP0799103B1 Composite cermet articles and method of making |
| 05/03/2000 | CN1252021A Abrasive tools with patterned grit distribution and manufacture thereof |
| 05/02/2000 | US6056911 Methods of treating preform elements including polycrystalline diamond bonded to a substrate |
| 05/02/2000 | US6056072 Lubricating grease |
| 05/02/2000 | US6056065 Motorized auger |
| 05/02/2000 | US6055886 Drill blank |
| 04/27/2000 | DE19820483C1 Verfahren und Vorrichtung zur Erstellung gesteuerter Hausanschlüsse Method and apparatus for creating controlled house connections |
| 04/26/2000 | EP0995876A2 Methods of manufacturing rotary drill bits |
| 04/26/2000 | EP0995010A1 Core barrel |
| 04/26/2000 | CN2375754Y Three-wing bit for petroleum geological prospecting |
| 04/26/2000 | CN2375753Y Single-roller bit |
| 04/25/2000 | US6053264 Cutter head mounting for drill bit |
| 04/25/2000 | US6053263 Cutting element tip configuration for an earth-boring bit |
| 04/20/2000 | WO2000022244A1 Auger |
| 04/19/2000 | CN2374637Y Diameter variable drilling mechanism for reinforced concrete bored concrete pile |
| 04/19/2000 | CN1051597C Rotary drill bit with improved cutter |
| 04/19/2000 | CN1051596C Rotary drill bit with improved cutter and seal protection |
| 04/18/2000 | US6051079 Wear resistant, diamond enhanced cutting tool for excavating |
| 04/18/2000 | US6050354 Rolling cutter bit with shear cutting gage |
| 04/18/2000 | US6050352 Drilling technique utilizing drilling fluids directed on low angle cutting faces |
| 04/13/2000 | WO2000020723A1 Rotatable cutting bit and bit washer therefor |
| 04/13/2000 | DE19844820A1 Bohrspitze für ein Bohrrohr Drill bit on a drill pipe |
| 04/13/2000 | CA2346458A1 Rotatable cutting bit and bit washer therefor |
| 04/12/2000 | EP0912814A4 Improved disc cutter and excavation equipment |
| 04/12/2000 | EP0800428B1 Composite cermet article |
| 04/12/2000 | CN2373552Y Drilling bore bit |
| 04/12/2000 | CN2373551Y Self-excitation oscillating chamber bore bit |
| 04/06/2000 | WO2000019055A1 Roller bit with collimated jets sweeping separate bottom-hole tracks |
| 04/05/2000 | EP0990766A2 Drill tip |
| 04/05/2000 | EP0990765A1 Percussive core barrel |
| 04/05/2000 | CN2372444Y Openable hollow composite seismic drill bit |
| 04/05/2000 | CN1249221A Diamond sinter and its mfg. method |
| 04/04/2000 | US6045750 Rock bit hardmetal overlay and proces of manufacture |
| 04/04/2000 | US6045440 Polycrystalline diamond compact PDC cutter with improved cutting capability |
| 04/04/2000 | US6045029 Earth-boring bit with improved rigid face seal |
| 04/04/2000 | US6044920 Rotatable cutting bit assembly with cutting inserts |
| 04/04/2000 | US6044919 Rotary spade drill arrangement |
| 03/30/2000 | WO2000017488A1 Through-drill string conveyed logging system |
| 03/29/2000 | EP0989284A2 Underbalanced well completion |
| 03/29/2000 | EP0989282A2 Improvements in preform cutting elements for rotary drag-type drill bits |
| 03/28/2000 | US6042463 Polycrystalline diamond compact cutter with reduced failure during brazing |
| 03/28/2000 | US6041875 Non-planar interfaces for cutting elements |
| 03/28/2000 | US6041874 Tubular actuator component for use in a drill string |
| 03/23/2000 | WO2000015947A1 Mining machine and mining method |