| Patents for E21B 10 - Drill bits (19,464) |
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| 05/14/2009 | US20090120692 Layered hardfacing, durable hardfacing for drill bits |
| 05/14/2009 | US20090120259 Cutting tool |
| 05/14/2009 | US20090120008 Impregnated drill bits and methods for making the same |
| 05/14/2009 | CA2704758A1 Methods and apparatuses for forming cutting elements having a chamfered edge for earth-boring tools |
| 05/13/2009 | EP2058470A2 An improved rotary roller reamer |
| 05/13/2009 | CN201236630Y Three teeth roller bit used for horizontal well and hard formation well |
| 05/12/2009 | US7530409 Rotary roller reamer |
| 05/12/2009 | CA2556109C Rolling cone drill bit having non-circumferentially arranged cutter elements |
| 05/12/2009 | CA2454016C Ribless bit with diamond impregnated cutter elements |
| 05/12/2009 | CA2423295C Quick release drill bit for down-hole drills |
| 05/12/2009 | CA2408970C Cutting tool and method of using same |
| 05/08/2009 | CA2641637A1 Method of attachment of a towing anchor to an iceberg |
| 05/07/2009 | WO2009059088A2 Impregnated rotary drag bit and related methods |
| 05/07/2009 | WO2009058808A1 Drill bits and tools for subterranean drilling |
| 05/07/2009 | WO2009042189A3 Rotary cutter for tunnel boring machine |
| 05/07/2009 | WO2009006874A3 Bearing cage for a roller bearing |
| 05/07/2009 | WO2008154196A3 Drill bit |
| 05/07/2009 | US20090114454 Thermally-Stable Polycrystalline Diamond Materials and Compacts |
| 05/07/2009 | US20090114453 Earth-boring tools with primary and secondary blades, methods of forming and designing such earth-boring tools |
| 05/07/2009 | US20090114452 Rock bit with a thermal insulating seal ring positioned in the seal gland |
| 05/07/2009 | CA2702983A1 Impregnated rotary drag bit and related methods |
| 05/06/2009 | EP2055890A1 Drill bit having an improved seal |
| 05/06/2009 | EP2054582A1 Stabilized seal for rock bits |
| 05/06/2009 | EP1828535B1 Micropore engagement surfaces for earth boring bit |
| 05/06/2009 | CN201232525Y Down-the-hole drill |
| 05/06/2009 | CN201232524Y Novel down-the-hole drill |
| 05/06/2009 | CN201232523Y High wind pressure bore bit |
| 05/06/2009 | CN101427000A Backup cutting element insert for rotary drill bits |
| 05/06/2009 | CN101424170A Coring tool, core convey assembly and core convey method |
| 05/06/2009 | CN100485132C Formative method for row-pile style water-proof wall underground |
| 05/05/2009 | US7527110 Percussive drill bit |
| 05/05/2009 | CA2436019C Coarse carbide substrate cutting elements and method of forming the same |
| 05/01/2009 | CA2642416A1 Expandable roller reamer |
| 04/30/2009 | WO2009055523A1 Method and apparatus for continuous formation sampling and analysis during wellbore drilling |
| 04/30/2009 | WO2009055199A2 Morphible bit |
| 04/30/2009 | WO2009020901A4 Earth-boring tools having particle-matrix composite bodies, methods for welding particle-matrix composite bodies and methods for repairing particle-matrix composite bodies |
| 04/30/2009 | WO2009012196A4 Roller cone bit bearing, and bearing materials |
| 04/30/2009 | US20090107732 Impregnated rotary drag bit and related methods |
| 04/30/2009 | US20090107731 Drillbit seal |
| 04/30/2009 | US20090107730 Drill bits and tools for subterranean drilling |
| 04/29/2009 | EP2052126A2 Tin seat for rock drill insert |
| 04/29/2009 | CN201228549Y Mining cemented carbide drill tooth and pick and drill using the same |
| 04/28/2009 | US7523794 Wear resistant assembly |
| 04/23/2009 | WO2009052130A1 System, method, and apparatus for variable junk slot depth in drill bit body to alleviate balling |
| 04/22/2009 | EP2049758A1 Drill string and method of making boreholes in the ground |
| 04/22/2009 | CN201225096Y Novel inner concave multiple-wing composite teeth diamond composite sheet drill head |
| 04/22/2009 | CN201225095Y Drill filling pile stone-shifting drill head |
| 04/21/2009 | US7520345 Fixed cutter rotary drill bit including support elements affixed to the bit body at least partially defining cutter pocket recesses |
| 04/21/2009 | US7520343 Retrievable center bit |
| 04/16/2009 | US20090095538 Polycrystalline Diamond Composite Constructions Comprising Thermally Stable Diamond Volume |
| 04/16/2009 | US20090095537 System, method, and apparatus for variable junk slot depth in drill bit body to alleviate balling |
| 04/16/2009 | US20090095536 Rock bit with hydraulic configuration |
| 04/15/2009 | EP1718838B1 Hydrodynamic pump passages for rolling cone drill bit |
| 04/15/2009 | CN201221317Y PDC drill bit |
| 04/15/2009 | CN201221316Y Drill bit |
| 04/15/2009 | CN201221311Y Hydraulic drilling and expanding integrated machine |
| 04/15/2009 | CN101408092A Rear inclined circular angle-shaped spiral drag bit |
| 04/15/2009 | CN101408091A Steel teeth roller bit |
| 04/14/2009 | US7516804 Polycrystalline diamond element comprising ultra-dispersed diamond grain structures and applications utilizing same |
| 04/11/2009 | CA2640823A1 Self sharpening cutting structure for expandable earth boring apparatus using impregnated and matrix materials |
| 04/09/2009 | WO2009046379A2 Nozzle having a spray pattern for use with an earth boring drill bit |
| 04/09/2009 | WO2009046082A2 Cutting structures for earth-boring drill bits |
| 04/09/2009 | WO2009046075A2 Drill bits and tools for subterranean drilling |
| 04/09/2009 | WO2009046069A2 Drill bit for subterranean drilling |
| 04/09/2009 | WO2009015338A3 Thrust bearings and method for cooling thrust bearings |
| 04/09/2009 | US20090090563 Diamond-bonded constrcutions with improved thermal and mechanical properties |
| 04/09/2009 | US20090090562 Cutting element having stress reduced interface |
| 04/09/2009 | US20090090561 Nozzle Having A Spray Pattern For Use With An Earth Boring Drill Bit |
| 04/09/2009 | US20090090560 Hole Boring Tool |
| 04/09/2009 | US20090090556 Methods and Systems to Predict Rotary Drill Bit Walk and to Design Rotary Drill Bits and Other Downhole Tools |
| 04/09/2009 | CA2701371A1 Cutting structures for earth-boring drill bits |
| 04/08/2009 | EP2044287A1 Cemented tungsten carbide rock bit cone |
| 04/08/2009 | CN101403067A Diamond drill bit matrix embed material suitable for weak-abrasiveness hard formation |
| 04/07/2009 | US7513320 Cemented carbide inserts for earth-boring bits |
| 04/07/2009 | US7513319 Reamer bit |
| 04/07/2009 | US7513318 Steerable underreamer/stabilizer assembly and method |
| 04/07/2009 | CA2529741C Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit) |
| 04/02/2009 | WO2009042659A1 Method of joining components of earth boring bits using a reactive foil and brazing material |
| 04/02/2009 | WO2009003088A3 Rounded cutter pocket having reduced stressed concentration |
| 04/02/2009 | WO2008157110A3 Cutting element for subterranean drilling |
| 04/02/2009 | US20090084608 Cutting structures for casing component drillout and earth boring drill bits including same |
| 04/02/2009 | US20090084607 Drill bits and tools for subterranean drilling |
| 04/02/2009 | US20090084606 Drill bits and tools for subterranean drilling |
| 04/01/2009 | EP2041389A1 Resonance enhanced drilling: method and apparatus |
| 04/01/2009 | EP1668219B1 Steerable bit assembly and methods |
| 03/31/2009 | US7510320 Extrusion auger with removable auger segments and removal tool |
| 03/31/2009 | US7510034 System, method, and apparatus for enhancing the durability of earth-boring bits with carbide materials |
| 03/31/2009 | US7510032 Hard composite cutting insert and method of making the same |
| 03/26/2009 | US20090078470 System, method, and apparatus for reactive foil brazing of cutter components for fixed cutter bit |
| 03/26/2009 | US20090078469 Methods of forming and using fiber-containing diamond-impregnated cutting tools |
| 03/26/2009 | US20090078466 Apparatus and Method for Driving Casing or Conductor Pipe |
| 03/26/2009 | US20090078461 Drilling subsurface wellbores with cutting structures |
| 03/26/2009 | DE202009000989U1 Werkzeug aus ausferritischem Eisen Tool ausferritic iron |
| 03/25/2009 | EP2039876A2 Drilling tool equipped with improved cutting element layout to reduce cutter damage through formation changes, method of design thereof and drilling therewith |
| 03/25/2009 | EP2038509A1 A roller reamer |
| 03/25/2009 | EP2038508A1 Excluder ring for earth-boring bit |
| 03/25/2009 | EP2038507A1 Surface textures for earth boring bits |
| 03/25/2009 | EP2038506A2 Cutting structure for earth-boring bit to reduce tracking |
| 03/25/2009 | EP2038505A1 A pdc drag bit |
| 03/25/2009 | CN201212358Y Drill bit |