| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 02/28/1995 | US5392862 Flow control sub for hydraulic expanding downhole tools |
| 02/23/1995 | WO1995005262A1 Drill bit |
| 02/21/1995 | US5390750 Downhole compaction and stabilization back reamer and drill bit |
| 02/16/1995 | WO1995004614A1 Ground fracturing probe |
| 02/16/1995 | CA2117457A1 Cutting insert |
| 02/15/1995 | EP0638384A1 A cutting insert |
| 02/15/1995 | EP0638383A1 Abrasive tool insert |
| 02/14/1995 | US5388655 Injection boring anchor with auger blade |
| 02/14/1995 | US5388484 Method of manufacturing diamond-impregnated drilling crowns |
| 02/14/1995 | CA1334406C Convex-shaped diamond cutting elements |
| 02/09/1995 | DE4326000A1 Pin drill bit for percussive drilling |
| 02/06/1995 | CA2108526A1 Ground fracturing probe |
| 02/02/1995 | WO1995003474A1 Downhole milling tool |
| 02/02/1995 | WO1995003473A1 Downhole milling tool |
| 02/02/1995 | WO1995003472A1 Method and apparatus for controlling the head of a drilling or core-drilling device |
| 02/01/1995 | CN1027552C 牙轮钻头 Cone bit |
| 01/31/1995 | US5385205 Dual mode rotary cutting tool |
| 01/25/1995 | EP0635326A1 Abrasive tool insert |
| 01/25/1995 | CN2188128Y Hole enlarging wing type cable tools capable of replacing bit without need of hoisting |
| 01/25/1995 | CN1027517C Drillingbit nozzle for petroleum well drilling |
| 01/24/1995 | US5383527 Asymmetrical PDC cutter |
| 01/24/1995 | US5383526 Methods for rock mining with non-coring rotary tools |
| 01/24/1995 | US5383525 Method of manufacturing a roller cutter drill bit |
| 01/18/1995 | EP0634528A2 Method for placing a binder suspension |
| 01/18/1995 | EP0634250A2 Cutting insert for demolishing tools |
| 01/18/1995 | CN1097391A Anchor with deoperable screw |
| 01/18/1995 | CN1027430C Hollow diamond bit for dry process |
| 01/17/1995 | US5382121 Drill bit for use in concrete and asphalt |
| 01/17/1995 | US5381868 Sealed bearing roller reamer |
| 01/11/1995 | EP0633387A2 Earth-boring bit with improved cutting structure |
| 01/11/1995 | CN2187221Y Swirl-nozzle |
| 01/10/1995 | US5380068 Deep kerfing in rocks with ultrahigh-pressure fan jets |
| 01/10/1995 | US5379854 Cutting element for drill bits |
| 01/10/1995 | US5379853 Insert stud cutter |
| 01/10/1995 | US5379852 Core drill bit |
| 01/05/1995 | WO1995000290A1 Method for supplying cooling medium to a grinding cup and grinding cup to carry out the method |
| 01/04/1995 | EP0631646A1 Well conduit cutting and milling apparatus and method |
| 01/04/1995 | EP0631645A1 Down reaming apparatus |
| 01/03/1995 | US5377773 Drill bit having combined positive and negative or neutral rake cutters |
| 01/03/1995 | US5377770 For tunneling through the ground |
| 01/03/1995 | US5377761 Ground fracturing probe |
| 12/28/1994 | EP0631033A1 Device for fixing cutting disks in a tunnel excavator |
| 12/27/1994 | US5375672 Mine roof drill bit and cutting insert therefor |
| 12/22/1994 | WO1994029567A1 System for in situ replacement of cutting means for a ground drill |
| 12/22/1994 | WO1994029564A1 A method for mounting hard metal buttons in a drill bit and a drill bit |
| 12/21/1994 | EP0629472A1 Abrasive tool with metallic bonding agent and active filler |
| 12/21/1994 | CN1096532A A method of making an abrasive compact |
| 12/20/1994 | US5373908 Chamfered cutting structure for downhole drilling |
| 12/20/1994 | US5373907 Method and apparatus for manufacturing and inspecting the quality of a matrix body drill bit |
| 12/20/1994 | US5373900 In a cutting tool |
| 12/14/1994 | EP0628700A2 A drilling tool for use in constructing large diameter boreholes |
| 12/14/1994 | EP0414751B1 Bit assembly utilizing carbide insert |
| 12/13/1994 | US5372210 Rolling cutter drill bits |
| 12/13/1994 | US5372209 For reaming bore holes |
| 12/13/1994 | CA1333484C Drill bit wear resistant surface for elastomeric seal |
| 12/08/1994 | WO1994021889A3 Improvements in or relating to drilling and to the extraction of fluids |
| 12/07/1994 | EP0627040A1 Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes |
| 12/07/1994 | CN2184780Y Directional plane surface explosive drill |
| 12/07/1994 | CN2184772Y Tooth wheel drill bit jet taker |
| 12/07/1994 | CN2184771Y Scraper dill bit |
| 12/06/1994 | US5370717 Abrasive compact surface; working surface; other surface bonded to carbide substrate which presents a matching surface; cutting edge |
| 12/06/1994 | US5370310 Device for directing the flow of an atomized slurry |
| 12/06/1994 | US5370195 Drill bit inserts enhanced with polycrystalline diamond |
| 12/01/1994 | DE4329582C1 Device for making longitudinal notches in the wall of a borehole |
| 11/30/1994 | EP0626500A2 Directional multi-blade boring head |
| 11/30/1994 | EP0626237A1 A method of making an abrasive compact |
| 11/30/1994 | EP0626041A1 Masonry anchors |
| 11/30/1994 | EP0430989B1 Investment casting process |
| 11/30/1994 | CN2184080Y Special head of bit |
| 11/29/1994 | US5368415 Spiral flights for improved soil mixing and efficient boring for use on multi-shaft auger soil mixing apparatus |
| 11/29/1994 | US5368114 Under-reaming tool for boreholes |
| 11/29/1994 | CA1333283C Mechanical face seal for rock bits |
| 11/29/1994 | CA1333282C Imbalance compensated drill bit |
| 11/26/1994 | CA2116267A1 Directional multi-blade boring head |
| 11/24/1994 | WO1994027023A1 Drill bit and other downhole tools |
| 11/24/1994 | DE4317037A1 Drilling apparatus |
| 11/23/1994 | EP0625628A1 Drill bits with composite cutting elements |
| 11/23/1994 | EP0625416A1 Saw chain cutter link |
| 11/23/1994 | EP0625396A1 Drilling tool |
| 11/23/1994 | CN2183441Y Directional splitting combined drilling tool |
| 11/22/1994 | US5366032 Rock bit |
| 11/22/1994 | US5366031 Auger head assembly and method of drilling hard earth formations |
| 11/22/1994 | US5366029 Large shaft over-reamer apparatus and method |
| 11/22/1994 | US5366009 Gravel pack well completions with auger-liner |
| 11/22/1994 | CA2123970A1 Chain saws |
| 11/22/1994 | CA2123969A1 Drill bits |
| 11/17/1994 | EP0624708A2 Nozzle arrangement for drag type drill bit |
| 11/17/1994 | EP0624707A2 Nozzle arrangement for drag bit |
| 11/16/1994 | CN1095007A Method for making diamond tool containing surface-metallized ceramic phase |
| 11/15/1994 | US5363932 PDC drag bit with improved hydraulics |
| 11/15/1994 | US5363930 Dual-diaphragm lubricant compensator for earth-boring bits |
| 11/15/1994 | US5363927 Apparatus and method for hydraulic drilling |
| 11/08/1994 | US5362073 Composite seal for rotary cone rock bits |
| 11/08/1994 | US5361859 Expandable gage bit for drilling and method of drilling |
| 11/02/1994 | EP0621919A1 Down-the-hole rock drill. |
| 11/02/1994 | CN2181562Y Water jet nozzle for bit |
| 11/01/1994 | US5360076 Dual metal face seal with single recessed energizer |
| 10/27/1994 | WO1994024405A1 Down-hole hammer drill having reverse circulation and drill bit for the hammer drill |
| 10/27/1994 | WO1994024404A1 Integrated drilling and rock bolting apparatus |
| 10/27/1994 | CA2160379A1 Integrated drilling and rock bolting apparatus |