| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 03/07/2001 | EP1081119A1 Cutting elements and methods of manufacture thereof |
| 03/06/2001 | US6197084 Thermal fatigue and shock-resistant material for earth-boring bits |
| 03/06/2001 | US6196341 Reduced residual tensile stress superabrasive cutters for earth boring and drill bits so equipped |
| 03/06/2001 | US6196340 Surface geometry for non-planar drill inserts |
| 03/06/2001 | US6196339 Dual-seal drill bit pressure communication system |
| 03/06/2001 | US6196338 Hardfacing rock bit cones for erosion protection |
| 03/06/2001 | US6196337 Water pressure post-hole digger |
| 03/06/2001 | US6196147 Folding and sewing apparatus |
| 03/01/2001 | DE19938646A1 Rotation boring head; has cutters arranged symmetrically on arms with one or more cutters arranged on central axis and spacing of 1.1 times shaft diameter |
| 03/01/2001 | DE10028091A1 Rotary drill bit for down-hole drills, etc. comprises a toothed rotating element and a seal isolating the bearing from an ambient environment |
| 02/28/2001 | EP1079063A1 Unsupported cuttings elements for rotary drill bits |
| 02/28/2001 | EP1077907A1 Concrete comprising an elastic substance and pile made of such a concrete |
| 02/28/2001 | EP0826071B1 Cemented carbide body with increased wear resistance |
| 02/28/2001 | CN2421403Y Composite tooth rock roller bit |
| 02/28/2001 | CN1062635C Drilling method and bit assembly to realise method |
| 02/27/2001 | US6193001 Method for forming a non-uniform interface adjacent ultra hard material |
| 02/27/2001 | US6193000 Drag-type rotary drill bit |
| 02/27/2001 | US6192999 Extended drill bit nozzle having extended retainer |
| 02/27/2001 | CA2150164C Rock drill |
| 02/22/2001 | WO2001012945A1 Bit connector |
| 02/21/2001 | EP1077307A1 Cable connection between two rods of an auger |
| 02/21/2001 | EP1077268A1 Composition for binder material |
| 02/21/2001 | EP0885343B1 Directional boring |
| 02/21/2001 | CN1285023A Rock drilling tool |
| 02/20/2001 | US6189634 Polycrystalline diamond compact cutter having a stress mitigating hoop at the periphery |
| 02/20/2001 | US6189633 Drill |
| 02/20/2001 | US6189631 Drilling tool with extendable elements |
| 02/20/2001 | CA2161464C Hardfacing composition for earth-boring bits |
| 02/13/2001 | US6187068 Composite polycrystalline diamond compact with discrete particle size areas |
| 02/13/2001 | US6186251 Method of altering a balance characteristic and moment configuration of a drill bit and drill bit |
| 02/13/2001 | US6186250 Sharp gage for mill tooth rockbits |
| 02/07/2001 | CN2418248Y Conic-spiral type rock-drilling drill-bit |
| 02/06/2001 | US6182533 Method of making a drill blank |
| 01/31/2001 | EP0920566B1 Rotary-percussion drill apparatus and method |
| 01/31/2001 | CN2417284Y High efficiency nozzle for drilling |
| 01/31/2001 | CN2417283Y Drill bit with changeable diameter for pouring pile hole |
| 01/30/2001 | US6179296 Dual functioning seal for rock bits |
| 01/30/2001 | CA2191662C Pressure molded powder metal milled tooth rock bit cone |
| 01/27/2001 | CA2314622A1 Reuseable cutting and milling tool |
| 01/25/2001 | DE19932440A1 Bohrzahn zur Erdbearbeitung Drilling tooth for Erdbearbeitung |
| 01/24/2001 | EP1070194A1 A mill and a method for milling |
| 01/24/2001 | CN1061122C Bit segments for ground drill bit |
| 01/23/2001 | US6176333 Diamond cap cutting elements with flats |
| 01/23/2001 | US6176332 Rotatable cutting bit assembly with cutting inserts |
| 01/23/2001 | US6176331 Bearing sealing means of earth boring bits |
| 01/23/2001 | US6176330 Rock bit face seal having anti-rotation pins |
| 01/23/2001 | US6176329 Drill bit with ridge-cutting cutter elements |
| 01/23/2001 | CA2220825C Mining bit |
| 01/18/2001 | DE10029476A1 Horizontal, subterranean, trenchless drilling head unit |
| 01/17/2001 | EP1069278A1 Drilling tooth for earth drilling |
| 01/17/2001 | EP1068425A1 Drillstring with stabilisers for re-entering a primary wellbore |
| 01/17/2001 | EP1068423A1 Apparatus and method for mitigating wear in downhole tools |
| 01/17/2001 | CN2415153Y Cylindrical wedge edge bull drill bit |
| 01/17/2001 | CN2415152Y Combined blade type bull drill bit |
| 01/17/2001 | CN2415151Y Steel tooth cutting structure of cone bit |
| 01/17/2001 | CN1280646A Directional drilling tool |
| 01/16/2001 | US6174111 Cutting tools for drilling concrete, aggregate, masonry or the like materials |
| 01/16/2001 | US6173798 Tungsten carbide nickel- chromium alloy hard member and tools using the same |
| 01/16/2001 | US6173797 Rotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability |
| 01/16/2001 | US6173796 Sleeve for orientating a tool |
| 01/11/2001 | DE10031833A1 Diamond-impregnated earth drill used in oil and gas industries comprises drill body and number of inserts fixed to drill body |
| 01/10/2001 | EP1066447A1 Rotary cone drill bit with improved bearing system |
| 01/10/2001 | CN1279741A Rotary drill bit and roller cutter for rock drilling |
| 01/10/2001 | CN1060417C Composite material containing diamond |
| 01/09/2001 | US6170830 Dual functioning seal for rock bits |
| 01/09/2001 | US6170583 Inserts and compacts having coated or encrusted cubic boron nitride particles |
| 01/09/2001 | US6170582 Rock bit cone retention system |
| 01/09/2001 | US6170576 Mills for wellbore operations |
| 01/04/2001 | WO2001000961A1 An underreamer and a method of using the underreamer |
| 01/04/2001 | WO2000053887A3 Wellbore primary barrier and related systems |
| 01/03/2001 | CN2413013Y Split down-the-hole drill bit |
| 01/03/2001 | CN2412684Y Diamond/hard metal composite piece |
| 01/03/2001 | CN1278467A Braze welding process of composite polycrystal-diamond bit |
| 01/03/2001 | CN1060244C Curved drilling apparatus |
| 01/02/2001 | USRE37006 High flow weld-in nozzle sleeve for rock bits |
| 01/02/2001 | US6167975 One cone rotary drill bit featuring enhanced grooves |
| 01/02/2001 | US6167958 Cutting matrix and method of applying the same |
| 12/30/2000 | CA2553380A1 Bi-centered drill bit having improved drilling stability, mud hydraulics and resistance to cutter damage |
| 12/27/2000 | CN1059948C Bearing seal structure |
| 12/27/2000 | CN1059851C Drilling tool with internal cavities for chip removal |
| 12/26/2000 | US6164395 Cutting structure for rotary drill bits |
| 12/26/2000 | US6164394 Drill bit with rows of cutters mounted to present a serrated cutting edge |
| 12/26/2000 | US6164390 Method of determining characteristics of a rotary drag-type drill bit |
| 12/19/2000 | US6161636 Boring head and bit protective collar |
| 12/19/2000 | US6161635 Drilling system drive steel |
| 12/19/2000 | US6161634 Cutter element with non-rectilinear crest |
| 12/19/2000 | US6161633 Apparatus for boring through a solid material |
| 12/14/2000 | WO2000045029A3 A method for setting a packer in a well bore, and a packer |
| 12/13/2000 | CN2410409Y PDC drill bit capable of complete drilling bending passway |
| 12/13/2000 | CN1059371C Drilling tool with rounded insert support surfaces |
| 12/12/2000 | US6159286 Forming substrate layer of catalyst material or graphite; placing template having pattern of apertures upon substrate layer, apertures configured to receive single diamond particle; filling apertures with diamond particles; pressing |
| 12/08/2000 | CA2310338A1 Directional boring head |
| 12/07/2000 | WO2000050729A3 Mills for wellbore operations |
| 12/07/2000 | WO2000047860A3 Directional drilling apparatus |
| 12/05/2000 | US6155360 Retractable drill bit system |
| 12/05/2000 | US6155349 Flexible wellbore mill |
| 11/30/2000 | DE19924683A1 Chisel or single-point cutter for an excavating, road drilling or mining machine is hard tipped by introducing bulk hard material into a tip recess and filling the interstices with a binder |
| 11/28/2000 | US6152232 Underbalanced well completion |
| 11/28/2000 | US6151960 Method of determining characteristics of a rotary drag-type drill bit |
| 11/23/2000 | WO2000070184A1 Hole opener with multisized, replaceable arms and cutters |