| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 11/14/2001 | CN2459348Y Counter-circulation bottom enlarging drill for hole drilling |
| 11/14/2001 | CN1322272A Claw tooth rotary bit |
| 11/13/2001 | US6315652 Abrasive tool inserts and their production |
| 11/13/2001 | US6315067 Cutting element with stress reduction |
| 11/13/2001 | US6315066 Microwave sintered tungsten carbide insert featuring thermally stable diamond or grit diamond reinforcement |
| 11/13/2001 | US6315065 Drill bit inserts with interruption in gradient of properties |
| 11/13/2001 | US6315064 Rotatable cutting bit assembly with cutting inserts |
| 11/08/2001 | WO2001083934A2 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 |
| 11/08/2001 | WO2001083932A1 Expandable apparatus for drift and reaming a borehole |
| 11/08/2001 | US20010037902 Force-balanced roller-cone bits, systems, drilling methods, and design methods |
| 11/08/2001 | US20010037901 Polycrystalline diamond compact cutter having a stress mitigating hoop at the periphery |
| 11/08/2001 | US20010037609 Pressing polycrystalline material into carbide substrates; sintering |
| 11/07/2001 | CN2458344Y Positive and negative circulation wet-working mechanical type dual-purpose drilling device for drilling hole and reaming |
| 11/07/2001 | CN1074499C Very high pressure-resistant drilling rig |
| 11/06/2001 | US6311793 Rock bit nozzle and retainer assembly |
| 11/06/2001 | US6311790 Removable boring head with tapered shank connector |
| 11/01/2001 | WO2001081708A1 Expandable bit |
| 11/01/2001 | US20010035302 Method for milling casing and drilling formation |
| 10/31/2001 | EP0877855B1 Diamond coated cutting tool insert and method of making same |
| 10/31/2001 | CN2457208Y Differential drilling and reaming hole purpose machine capable of detecting and controlling |
| 10/31/2001 | CN1073916C Tool having tool-post and bit tool |
| 10/30/2001 | US6308790 Drag bits with predictable inclination tendencies and behavior |
| 10/30/2001 | US6308789 Drill bit for directional drilling |
| 10/27/2001 | CA2306322A1 Underreamer for reducing damage to coal seams |
| 10/25/2001 | WO2001079653A1 A rock drill bit and a check valve |
| 10/25/2001 | WO2001079650A1 Drillable drill bit nozzle |
| 10/25/2001 | WO2001079649A2 Apparatus and method for directional drilling |
| 10/25/2001 | DE10020139A1 Drilling bit has shaft with drill crown, magnetic core movable in shaft, capacitor discharged via discharge contacts and electrodes in water to produce electrohydraulic pulse for breaking rock |
| 10/25/2001 | DE10017894A1 Verfahren und Vorrichtung zur Herstellung von hinterschnittenen Hohlräumen, insbesondere zur Herstellung von Traggliedern und Nägeln Method and apparatus for the production of undercut cavities, in particular for the production of support members and nails |
| 10/25/2001 | DE10005941A1 Method for producing bore holes for piling has a rock cutting hammer and concrete supply duct incorporated into a multi purpose boring head |
| 10/24/2001 | CN2455916Y Diamond composite drilling bits for boring hole |
| 10/24/2001 | CN1319158A Through-drill string conveyed logging system |
| 10/23/2001 | US6305483 Multi-piece rotary cone drill bit seal |
| 10/18/2001 | WO2001077445A1 Method and device for the production of back-cut cavities |
| 10/18/2001 | US20010030067 Method of applying a wear-resistant layer to a surface of a downhole component |
| 10/18/2001 | US20010030066 Rock bit with improved nozzle placement |
| 10/18/2001 | US20010030065 Rotary drill bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics |
| 10/18/2001 | US20010030063 Drill bits with reduced exposure of cutters |
| 10/17/2001 | EP1146200A1 Drill bit design using neural networks |
| 10/17/2001 | CN2454521Y Slip-in structure gear-wheel |
| 10/17/2001 | CN1318129A Mining machine and mining method |
| 10/16/2001 | US6302224 Drag-bit drilling with multi-axial tooth inserts |
| 10/16/2001 | US6302223 Rotary drag bit with enhanced hydraulic and stabilization characteristics |
| 10/15/2001 | CA2322147A1 Method and apparatus for predicting an operating characteristic of a rotary earth boring bit |
| 10/11/2001 | WO2001075261A1 Back reamer |
| 10/11/2001 | US20010028827 Method and apparatus for forming piles in place |
| 10/11/2001 | US20010027881 Steel tooth cutter element with expanded crest |
| 10/10/2001 | CN2453107Y Double open type drilling bit for seismic drilling |
| 10/10/2001 | CN2453106Y Super head composite cutting means |
| 10/10/2001 | CN1316816A Digging device |
| 10/09/2001 | US6298930 Drill bits with controlled cutter loading and depth of cut |
| 10/09/2001 | US6298929 Bi-center bit assembly |
| 10/04/2001 | WO2001073252A2 Rotatable cutting tool |
| 10/04/2001 | WO2000043628A3 Rotary-type earth drilling bit, modular gauge pads therefor and methods of testing or altering such drill bits |
| 10/04/2001 | US20010026736 Cutting matrix and method applying the same |
| 10/04/2001 | US20010025728 Cutter element with non-linear, expanded crest |
| 10/04/2001 | EP1138871A1 Twist drill |
| 10/04/2001 | DE10015203A1 Wendelbohrer Twist drill |
| 10/03/2001 | CN2451714Y Diamond bit for petroleum prospecting well drilling |
| 10/03/2001 | CN1315241A Twist-drill |
| 10/02/2001 | US6296069 Bladed drill bit with centrally distributed diamond cutters |
| 10/02/2001 | US6296067 Protected lubricant reservoir for sealed bearing earth boring drill bit |
| 10/02/2001 | CA2212276C Composite constructions with oriented microstructure |
| 09/27/2001 | WO2001071152A1 Segment for a core drill bit and method of manufacture |
| 09/27/2001 | WO2001038683A8 A method for the manufacturing of a drill bit for percussive rock drilling and a rock drill bit and buttons therefor |
| 09/27/2001 | US20010023783 Twist drill |
| 09/27/2001 | CA2403530A1 Segment for a core drill bit and method of manufacture |
| 09/26/2001 | EP0847478A4 Tool for transporting cutting means to and from a ground drill |
| 09/26/2001 | EP0832344A4 Down hole hammer assembly |
| 09/26/2001 | EP0728050B1 Method and system of trajectory prediction and control using pdc bits |
| 09/26/2001 | EP0697057B1 Drill bit and other downhole tools |
| 09/26/2001 | CN2450369Y Roller bit having alloy coating covered surface |
| 09/26/2001 | CN2450368Y Roller bit with surface coated with ceramic layer |
| 09/26/2001 | CN2450367Y Hydraulic reduced drilling tool stabilizer |
| 09/20/2001 | WO2001068334A1 Drill bit |
| 09/20/2001 | US20010022464 Mining machine |
| 09/19/2001 | EP1134355A2 Rotary drill bit |
| 09/19/2001 | EP1133614A1 Retractable drill bit system |
| 09/19/2001 | EP1014877A4 Titanium molybdenum hafnium alloys for medical implants and devices |
| 09/19/2001 | CN2448906Y PDC drill bit adaptable to hard formation |
| 09/18/2001 | US6290008 Inserts for earth-boring bits |
| 09/18/2001 | US6290007 Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability |
| 09/18/2001 | US6290006 Apparatus and method for a roller bit using collimated jets sweeping separate bottom-hole tracks |
| 09/18/2001 | US6290002 Pneumatic hammer drilling assembly for use in directional drilling |
| 09/13/2001 | WO2001066902A1 Drill bit |
| 09/13/2001 | WO2001066900A2 Method and apparatus for directional boring under mixed conditions |
| 09/13/2001 | WO2001066899A2 Rock drill |
| 09/13/2001 | WO1997027380A3 Method for forming a window in a tubular and apparatus for use in said method |
| 09/13/2001 | US20010020552 Bi-centered drill bit having improved drilling stability, mud hydraulics and resistance to cutter damage |
| 09/13/2001 | US20010020551 Rotary drag-type drill bits and methods of designing such bits |
| 09/13/2001 | DE10011108A1 Rock drill bit for a hammer drill has one or more spirals extending to the hard metal insert at the head with an increasing width to the spiral backs to take the groove for mounting the embedded insert in a robust fitting |
| 09/12/2001 | EP1131532A1 Downhole tool with extendable members |
| 09/12/2001 | CN1312423A Hydraulic structure of single gear wheel drilling bit |
| 09/11/2001 | US6287360 High-strength matrix body |
| 09/11/2001 | US6286498 Metal bond diamond tools that contain uniform or patterned distribution of diamond grits and method of manufacture thereof |
| 09/07/2001 | WO2001065052A1 Self-penetrating drilling method and thrust-generating tool for implementing same |
| 09/07/2001 | WO2001065051A1 Rock drill bit and method for its manufacturing |
| 09/07/2001 | WO2001065049A2 Cavitating jet |
| 09/07/2001 | WO2001065048A2 Rock drill |
| 09/07/2001 | CA2397146A1 Rock drill bit and method for its manufacturing |