| Patents for E21B 10 - Drill bits (19,464) |
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| 12/30/2009 | WO2009120750A3 Stabilizer and reamer system having extensible blades and bearing pads and method of using same |
| 12/30/2009 | WO2009114720A3 Texturing of the bearing surface for a roller cone rock bit |
| 12/30/2009 | WO2008086083A3 Drill bits and other downhole tools with hardfacing having tungsten carbide pellets and other hard materials |
| 12/30/2009 | EP2137373A1 Drilling tool |
| 12/30/2009 | EP2137372A2 Morphible bit |
| 12/30/2009 | CN201372753Y Double-thread hollow core drill bit |
| 12/30/2009 | CN201372732Y Drill bit |
| 12/30/2009 | CN201372731Y Strengthened composite diamond segment |
| 12/30/2009 | CN201372730Y Diamond bit with spiral lip part |
| 12/30/2009 | CN201372729Y Three-wing-surface gauge air hammer drill |
| 12/30/2009 | CN201372728Y Expanding drill |
| 12/30/2009 | CN201372727Y Guide bit for horizontal directional drilling pipe-laying drilling machine |
| 12/30/2009 | CN201372726Y Tri-cone bit with six-point location |
| 12/30/2009 | CN201372725Y Cylindrical drill bit of rotary drilling rig |
| 12/30/2009 | CN201372724Y Roller cone bits with grouped unequal space tooth arrangement |
| 12/30/2009 | CN201372723Y Combined water drill aiguille |
| 12/30/2009 | CN101614109A Process for preparing novel drill rod with outer cutting sleeve |
| 12/30/2009 | CN101614108A Roller cone drill bits with optimized bearing structures |
| 12/30/2009 | CN101614107A Matrix drill bits and method of manufacture |
| 12/30/2009 | CA2729587A1 Drill bit having functional articulation to drill boreholes in earth formations in all directions |
| 12/30/2009 | CA2729543A1 Reaming tool |
| 12/30/2009 | CA2729542A1 Reaming tool |
| 12/29/2009 | CA2454388C Injecting a fluid into a borehole ahead of the bit |
| 12/29/2009 | CA2453038C Well drilling bit |
| 12/24/2009 | US20090314548 Reaming and Stabilization Tool and Method for its Use in a Borehole |
| 12/23/2009 | CN201367856Y Rapid high-wind-pressure down-hole impact drill bit |
| 12/23/2009 | CN201367855Y Drilling polycrystalline diamond compact covered by CVD diamond coating |
| 12/23/2009 | CN201367854Y Reverse-circulation impact drill bit |
| 12/23/2009 | CN101611213A Rotary drag bits having a pilot cutter configuration and method to pre-fracture subterranean formations therewith |
| 12/23/2009 | CN101611212A Intermetallic Bonded Diamond (IBD) cutting elements |
| 12/23/2009 | CN101611211A Method and apparatus for collecting drill bit performance data |
| 12/23/2009 | CN101611210A Intermetallic aluminide polycrystalline diamond compact (pdc) cutting elements |
| 12/23/2009 | CN101608533A Drill bit impregnated with diamond film and manufacturing method thereof |
| 12/23/2009 | CN100572740C Assemblage control system and method for establishing threaded connection |
| 12/17/2009 | WO2009152197A2 Methods for sintering bodies of earth boring tools and structures formed during the same |
| 12/17/2009 | WO2009152196A2 Method of selectively adapting material properties across a rock bit cone |
| 12/17/2009 | WO2009152195A2 Methods of forming earth-boring tools including sinterbonded components and tools formed by such methods |
| 12/17/2009 | WO2009152194A2 Composite metal, cemented carbide bit construction |
| 12/17/2009 | WO2009132183A3 Arrangement of cutting elements on roller cones for earth boring bits |
| 12/17/2009 | WO2009114737A3 Texturing of the seal surface for a roller cone rock bit |
| 12/17/2009 | US20090308664 Drill bit with replaceable blade members |
| 12/17/2009 | US20090308663 Rotary drill bits and drilling tools having protective structures on longitudinally trailing surfaces |
| 12/17/2009 | US20090308662 Method of selectively adapting material properties across a rock bit cone |
| 12/17/2009 | US20090308661 Exhaust valve and bit assembly for down-hole percussive drills |
| 12/16/2009 | EP2132403A2 Drilling head for reborinq a stuck valve |
| 12/16/2009 | EP2132402A1 Downhole tool |
| 12/16/2009 | EP2132401A2 Optimized machining process for cutting tubulars downhole |
| 12/16/2009 | EP2132400A1 Drill bit assembly and method of performing an operation in a wellbore |
| 12/16/2009 | EP2132399A1 System, method, and apparatus for passive and active updrill features on roller cone drill bits |
| 12/16/2009 | EP2132398A1 Drilling device for drilling and reaming of a hole |
| 12/16/2009 | EP2132395A1 High productivity core drilling system |
| 12/16/2009 | CN201363091Y Quasi constant strength blade PDC bore bit |
| 12/16/2009 | CN201363090Y Micro-coring PDC bore bit |
| 12/16/2009 | CN201363089Y Rotary-excavating drill bit of sand |
| 12/16/2009 | CN101605962A Rotary drag bit with increased back rake angle gauge cutter |
| 12/16/2009 | CN101603309A Occlusive pile of long spiral stirring water-stop curtain and construction process thereof |
| 12/16/2009 | CN100570122C Bidirectional helix extruding-enlarging pile construction method and bidirectional helix closed extruding-enlarging aiguille |
| 12/15/2009 | US7631709 Drill bit and cutter element having chisel crest with protruding pilot portion |
| 12/15/2009 | US7631705 Enhanced screen auger sampling system |
| 12/15/2009 | CA2508003C Method and apparatus for vertical voltage potential mapping |
| 12/10/2009 | WO2009149169A2 Passive and active up-drill features on fixed cutter earth-boring tools and related methods |
| 12/10/2009 | WO2009149158A2 Methods of attaching a shank to a body of an earth boring tool including a load bearing joint and tools formed by such methods |
| 12/10/2009 | WO2009149157A2 Methods of forming earth-boring tools using geometric compensation and tools formed by such methods |
| 12/10/2009 | WO2009148784A2 Wear indicators for expandable earth boring apparatus |
| 12/10/2009 | WO2009147072A2 Drill bit and method for inserting, expanding, collapsing, and retrieving drill bit |
| 12/10/2009 | WO2009146895A2 Drill head |
| 12/10/2009 | US20090301789 Methods of forming earth-boring tools including sinterbonded components and tools formed by such methods |
| 12/10/2009 | US20090301788 Composite metal, cemented carbide bit construction |
| 12/10/2009 | US20090301787 Methods of attaching a shank to a body of an earth-boring tool including a load bearing joint and tools formed by such methods |
| 12/10/2009 | US20090301786 Methods of forming earth-boring tools using geometric compensation and tools formed by such methods |
| 12/10/2009 | US20090301784 Constricting Flow Diverter |
| 12/10/2009 | US20090301779 Earth boring device |
| 12/10/2009 | CA2739664A1 Drill bit and method for inserting, expanding, collapsing, and retrieving drill bit |
| 12/10/2009 | CA2720134A1 Wear indicators for expandable earth boring apparatus |
| 12/09/2009 | EP2129860A1 Method of forming pockets for receiving drill bit cutting elements |
| 12/09/2009 | CN201358718Y Reaming drill bit |
| 12/09/2009 | CN201358717Y Rock drilling drill bit |
| 12/09/2009 | CN201358716Y Piston-type multilayer broaching bit |
| 12/09/2009 | CN201358715Y Oil roller bit floating sealing device |
| 12/09/2009 | CN201358714Y Spiral drilling machine of formed concrete pile |
| 12/09/2009 | CN101600848A Drilling tool |
| 12/09/2009 | CN101598005A Ground source heat pump well drilling wear-resistance bit and manufacturing method thereof |
| 12/09/2009 | CN101598004A Rock drill |
| 12/09/2009 | CN100567697C Three teeth roller bit for mining |
| 12/09/2009 | CN100567696C Matrix drill bits and method of manufacturing same |
| 12/09/2009 | CN100567694C Device for drilling a bore in the ground |
| 12/08/2009 | US7628234 Thermally stable ultra-hard polycrystalline materials and compacts |
| 12/08/2009 | US7628233 Carbide bolster |
| 12/08/2009 | US7628232 Rotary-percussion drill with a four-start helical shaft |
| 12/08/2009 | US7628231 Protector for rock bit seals |
| 12/08/2009 | US7628230 Wide groove roller cone bit |
| 12/08/2009 | US7628228 Core drill bit with extended crown height |
| 12/08/2009 | CA2579636C Cutter element with expanded crest geometry |
| 12/03/2009 | WO2009146096A1 Rotary drill bits and drilling tools having protective structures on longitudinally trailing surfaces |
| 12/03/2009 | WO2009146078A1 Fixed cutter bit with backup cutter elements on secondary blades |
| 12/03/2009 | WO2009146062A1 Compound engagement profile on a blade of a down-hole stabilizer and methods therefor |
| 12/03/2009 | WO2009101476A3 Directional drilling system |
| 12/03/2009 | US20090294182 Degradation Assembly |
| 12/03/2009 | US20090294181 Box gusseted earth auger |
| 12/03/2009 | US20090294178 Stabilizer and reamer system having extensible blades and bearing pads and method of using same |