| Patents for E21B 10 - Drill bits (19,464) |
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| 08/24/2006 | US20060185908 Layered hardfacing, durable hardfacing for drill bits |
| 08/24/2006 | US20060185906 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 08/24/2006 | US20060185901 Drilling tool equipped with improved cutting element layout to reduce cutter damage through formation changes, methods of design and operation thereof |
| 08/24/2006 | DE102004053887A1 Hard and flintiest stone and minerals removing method for single sided conical disk roller bit, involves providing fast moving eccentric cam that is driven with shaft, where rotating disk roller bits are radially arranged at carrier |
| 08/23/2006 | CN2809187Y Section-variable sheet-like alloy bit |
| 08/23/2006 | CN2809186Y Flow channel structure of roller bit for mine |
| 08/23/2006 | CN2809185Y Sealing bearing structure of roller bit |
| 08/23/2006 | CN2809184Y Cutting tooth with ellipsoidal tooth-tip |
| 08/23/2006 | CN2809183Y Combined sleeved drill bit |
| 08/23/2006 | CN1821540A Hard alloy drill plate and drill bit |
| 08/23/2006 | CN1271308C Method for changing junk slot shape of PDC drill |
| 08/23/2006 | CA2537633A1 Thermally stable polycrystalline diamond materials, cutting elements incorporating the same and bits incorporating such cutting elements |
| 08/22/2006 | US7093677 Percussion drill head |
| 08/22/2006 | US7093676 Apparatus and methods for sponge coring |
| 08/22/2006 | US7093675 Drilling method |
| 08/22/2006 | US7093671 Pneumatic rock-boring device and method for starting such a device |
| 08/22/2006 | CA2228156C Rolling cone bit with enhancements in cutter element placement and materials to optimize borehole corner cutting duty |
| 08/17/2006 | WO2006085105A1 Steerable rotary directional drilling tool for drilling boreholes |
| 08/17/2006 | WO2005019593A3 Helical drag bit and method of using the same |
| 08/17/2006 | US20060180356 PDC drill bit using optimized side rake angle |
| 08/17/2006 | US20060180355 Drill bit |
| 08/17/2006 | US20060180354 Stress-relieved diamond inserts |
| 08/17/2006 | DE102004062912A1 Bohrwerkzeug und Bohrmaschine Drill and drill |
| 08/17/2006 | CA2597390A1 Steerable rotary directional drilling tool for drilling boreholes |
| 08/16/2006 | EP1691030A1 Apparatus and method for directional drilling of holes |
| 08/16/2006 | EP1689966A1 Nozzle unit and method for excavating a hole in an object |
| 08/16/2006 | EP1242711B1 Drilling bit for drilling while running casing |
| 08/16/2006 | CN2806741Y Double-blade bore bit |
| 08/16/2006 | CN2806740Y Drilling bit of pile engine for building construction |
| 08/16/2006 | CN1818322A Pouring pore expander |
| 08/16/2006 | CN1818228A Formative method for row-pile style water-proof wall underground and spiral driller therefor |
| 08/16/2006 | CN1818104A Production of immersing alloy for petroleum drilling bit |
| 08/15/2006 | US7090038 Bedrock drilling and excavating apparatus |
| 08/15/2006 | US7090034 Reamer having toroidal crusher body and method of use |
| 08/15/2006 | CA2331700C Pneumatic ground piercing tool with movable chisel head |
| 08/10/2006 | WO2006050252A3 Improved underreamer and method of use |
| 08/10/2006 | WO2006043999A8 Cast flapper with hot isostatic pressing treatment |
| 08/09/2006 | EP1687505A1 Fluid jet drilling tool |
| 08/09/2006 | EP1687239A1 Dual-phase hard material, method for the production thereof and its use |
| 08/09/2006 | EP1687126A1 Drilling and/or chiselling tool |
| 08/09/2006 | CN2804359Y Metal connecting pad for hard metal bit and bit adopting the same |
| 08/09/2006 | CN1816679A Downhole tool having radially extendable members |
| 08/08/2006 | US7086808 Method and apparatus for on-grade boring |
| 08/08/2006 | US7086489 Multi-lobed cutter element for drill bit |
| 08/08/2006 | US7086488 Cutting element having enhanced cutting geometry |
| 08/08/2006 | US7086487 Anti-mud packing seal gland |
| 08/08/2006 | US7086485 Directional casing drilling |
| 08/08/2006 | CA2535387A1 Thermally stable polycrystalline diamond cutting elements and bits incorporating the same |
| 08/08/2006 | CA2422262C Multi profile performance enhancing concentric drill bit |
| 08/08/2006 | CA2373415C Gage trimmers and bit incorporating the same |
| 08/08/2006 | CA2332603C Composite constructions having ordered microstructures |
| 08/03/2006 | WO2006081342A1 Converging diverging nozzle for earth-boring drill bits, method of substantially bifurcating a drilling fluid flowing therethrough, and drill bits so equipped |
| 08/03/2006 | WO2006081341A1 Rotary drag bit including a central region having a plurality of cutting structures, method of manufacture thereof, and displacement for manufacture thereof |
| 08/03/2006 | WO2006079166A1 Roller reamer |
| 08/03/2006 | WO2005074493B1 Anti-tracking earth boring bit with selected varied pitch for overbreak optimization and vibration reduction |
| 08/01/2006 | US7083011 Fluid drilling head |
| 08/01/2006 | US7083010 Apparatus and method for drilling and reaming a borehole |
| 08/01/2006 | CA2413947C Rock drill head |
| 08/01/2006 | CA2411290C Auger/vehicle interface jig |
| 08/01/2006 | CA2388948C Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability |
| 08/01/2006 | CA2348188C Rolling cone bit with elements fanned along the gage curve |
| 08/01/2006 | CA2214552C Drill for making a pole in the ground and method applying this drill |
| 08/01/2006 | CA2204018C 2-stage underreamer |
| 07/27/2006 | WO2006078508A2 Waler support system |
| 07/27/2006 | WO2006076795A1 Bit for drilling a hole |
| 07/27/2006 | US20060166615 Composite abrasive compact |
| 07/27/2006 | US20060162969 Cutting elements formed from ultra hard materials having an enhanced construction |
| 07/27/2006 | US20060162968 PDC drill bit using optimized side rake distribution that minimized vibration and deviation |
| 07/27/2006 | US20060162967 Abrasive-impregnated cutting structure having anisotropic wear resistance and drag bit including same |
| 07/27/2006 | US20060162966 Rotary drag bit including a central region having a plurality of cutting structures, method of manufacture thereof, and displacement for manufacture thereof |
| 07/27/2006 | US20060162965 Rock drill bit |
| 07/27/2006 | DE102004055090A1 Hard stone material removal comprises using a rapidly rotating conical disc roller unit with chisels on a carrier |
| 07/26/2006 | CN2799835Y Blank type drilling bit containing hybrid-insertion type laminated slice and polymerized crystal |
| 07/26/2006 | CN1807668A Diamond drill bit matrix powder |
| 07/26/2006 | CN1266368C Auger drill |
| 07/25/2006 | CA2533356A1 Cutting elements formed from ultra hard materials having an enhanced construction |
| 07/24/2006 | CA2738687A1 Pdc drill bit with cutter design optimized with dynamic centerline analysis having an angular separation in imbalance forces of 180 degrees for maximum time |
| 07/20/2006 | US20060157286 Superabrasive inserts including an arcuate peripheral surface |
| 07/20/2006 | US20060157285 Polycrystalline diamond insert, drill bit including same, and method of operation |
| 07/20/2006 | US20060157284 Method and device for the production of bores |
| 07/20/2006 | US20060157280 Drilling efficiency through beneficial management of rock stress levels via controlled oscillations of subterranean cutting elements |
| 07/20/2006 | US20060157279 Fixed-head bit with stabilizing features |
| 07/20/2006 | US20060157246 Window reaming and coring apparatus and method of use |
| 07/19/2006 | CN1806087A Percussive drill bit |
| 07/19/2006 | CN1804362A Roller bit |
| 07/19/2006 | CN1804016A Self-repairing multi-soap based composite bearing lubricating grease and preparation method thereof |
| 07/18/2006 | CA2385547C Mounting attachment and bearing system for an industrial earth-boring cutter |
| 07/18/2006 | CA2365310C Wellbore primary barrier and related systems |
| 07/18/2006 | CA2340382C Polycrystalline diamond carbide composites |
| 07/18/2006 | CA2130818C Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes |
| 07/13/2006 | WO2006072761A2 Downhole tool |
| 07/13/2006 | WO2006023376A3 Indexable cutting inserts and methods for producing the same |
| 07/13/2006 | US20060150777 Methods of manufacturing and repairing steel body rotary drill bits including support elements affixed to the bit body at least partially defining cutter pocket recesses |
| 07/13/2006 | CA2593797A1 Downhole tool |
| 07/12/2006 | EP1490578B1 Percussion drill bit and a button therefor |
| 07/12/2006 | CN1800576A Hydraulic underreamer and sections for use therein |
| 07/12/2006 | CN1263937C Reverse circulation drilling system with bit locked underreamer arms |
| 07/11/2006 | US7073797 Tool holder for annular core bit |
| 07/11/2006 | US7073611 Ion-beam assisted deposition of inorganic coatings for elastomeric seal wear resistance improvement |
| 07/11/2006 | CA2173313C Rock bit nozzle diffuser |