| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 01/03/1997 | WO1997000372A1 Integral drilling tool bit |
| 01/03/1997 | WO1997000371A1 Down hole hammer assembly |
| 01/03/1997 | CA2224656A1 Down hole hammer assembly |
| 01/02/1997 | EP0750716A1 Milling tool |
| 01/01/1997 | CN1139175A Gage surface and method for milled tooth cutting structure |
| 12/31/1996 | US5588497 Mounting drill buttons |
| 12/24/1996 | US5587540 Soil sampling device with latch assembly having a variable circumferential shape |
| 12/24/1996 | US5586612 Roller cone bit with positive and negative offset and smooth running configuration |
| 12/24/1996 | US5586611 Drill bit having dual split bushings for cutter support and retention |
| 12/19/1996 | WO1996040461A1 Masonry drill bit |
| 12/19/1996 | DE19521447A1 Roller cutter drilling bit for bore holes achieving high cutting efficiency |
| 12/19/1996 | CA2221617A1 Masonry drill bit |
| 12/18/1996 | EP0748668A2 Method for manufacturing rotary drill bits |
| 12/17/1996 | CA2047874C Excavation tool |
| 12/16/1996 | CA2151906A1 Well completion tool and process |
| 12/12/1996 | WO1996039568A1 Rotary cone drill bit modular arm |
| 12/11/1996 | EP0747566A1 Earth-boring bit having shear-cutting heel elements |
| 12/11/1996 | EP0746665A1 An apparatus for drilling open a tunnel and drilling method |
| 12/11/1996 | CN2242330Y Diamond composition mat dill bit for mining use |
| 12/10/1996 | US5582261 Drill bit having enhanced cutting structure and stabilizing features |
| 12/10/1996 | US5582258 Earth boring drill bit with chip breaker |
| 12/05/1996 | DE19515001A1 Drill head of hollow drill auger |
| 12/04/1996 | EP0579662B1 Cutting composite formed of cemented carbide substrate and diamond layer |
| 12/03/1996 | US5579856 Gage surface and method for milled tooth cutting structure |
| 12/03/1996 | US5579855 Rotary cone rock bit and method |
| 11/28/1996 | WO1996037679A1 Percussion drill bit, an insert, a use and a method of maintaining the drill bit diameter |
| 11/28/1996 | CA2218141A1 Percussion drill bit, an insert, a use and a method of maintaining the drill bit diameter |
| 11/26/1996 | US5577565 Compact roller cutter |
| 11/21/1996 | WO1996036206A2 Method of hard facing a substrate, and weld rod used in hard facing a substrate |
| 11/20/1996 | EP0743136A1 Method of manufacturing chisel for impact tool |
| 11/20/1996 | EP0742867A1 Drilling bit assembly and apparatus |
| 11/20/1996 | CN1135957A Rotary drill |
| 11/19/1996 | US5575342 Percussion drill bit, an insert for use therein and a method of drilling a bore |
| 11/14/1996 | WO1996035856A1 Drilling tool |
| 11/14/1996 | DE19618109A1 Producing sintered hard metal components |
| 11/13/1996 | EP0742342A2 Rotary drill bit |
| 11/13/1996 | EP0741834A1 System, method and cutterhead for dry full-area drilling |
| 11/07/1996 | WO1996035039A1 Tubular actuator component for use in a drill-string |
| 11/06/1996 | EP0741228A2 Improvement in or relating to cutting element for rotary drill bits |
| 11/05/1996 | US5570750 For forming a borehole |
| 11/05/1996 | US5570748 Drill bit for geological exploration |
| 10/31/1996 | WO1996034225A1 Method and apparatus for removal of utility line and replacement with polyolefin pipe |
| 10/30/1996 | EP0739673A1 Tube for hole saw |
| 10/29/1996 | US5568838 Of a subterranean formation |
| 10/23/1996 | EP0738823A2 Improvements in or relating to elements faced with superhard material |
| 10/23/1996 | EP0738355A1 Improvements in or relating to apparatus for use in forming piles |
| 10/22/1996 | US5566779 Insert for a drill bit incorporating a PDC layer having extended side portions |
| 10/22/1996 | CA2001262C Rock drilling method and apparatus |
| 10/16/1996 | EP0737797A2 Roller cutter drill bit |
| 10/16/1996 | CN2237711Y Horseshoe roller bit |
| 10/15/1996 | US5564511 Composite polycrystalline compact with improved fracture and delamination resistance |
| 10/08/1996 | US5562171 Anti-balling drill bit |
| 10/08/1996 | CA2095602C Cold headed center vacuum drill bit |
| 10/03/1996 | WO1996030623A1 Milling tool, whipstock, milling system and method of forming a window in the wall of a tubular |
| 10/03/1996 | WO1996030622A1 Whipstock |
| 10/03/1996 | WO1996030620A1 Rock drilling tool, drill bit and a method of transferring percussive energy |
| 10/03/1996 | CA2216974A1 Rock drilling tool, drill bit and a method of transferring percussive energy |
| 10/02/1996 | EP0735232A1 Cutter bit for use in drilling operations |
| 10/02/1996 | CN2236540Y Dual core drill bit |
| 10/02/1996 | CN1132135A Tool having tool-post and bit tool |
| 10/01/1996 | US5560440 For drilling subterranean formations |
| 09/26/1996 | WO1996029499A1 Bi-directional roller reamer |
| 09/25/1996 | EP0733778A2 Cutting insert for drag drill bit |
| 09/25/1996 | EP0733777A2 Cutting insert for rotary drag drill bit |
| 09/25/1996 | EP0733776A2 Rotary drag bit with pdc gauge bearing pads |
| 09/25/1996 | EP0733424A2 Method of making cemented carbide body for tools and wear parts |
| 09/25/1996 | EP0327598B1 Fusion-drilling process |
| 09/24/1996 | US5558172 Earth boring bit and lubricator compensation therefor |
| 09/24/1996 | US5558170 Method and apparatus for improving drill bit stability |
| 09/19/1996 | WO1996028632A1 Rock drill bit and method for hardening a rock drill bit |
| 09/19/1996 | CA2214129A1 Rock drill bit and method for hardening a rock drill bit |
| 09/18/1996 | EP0732164A1 Drilling tool, particularly for percusive drilling of stone |
| 09/11/1996 | EP0731250A2 Cutter assembly for a rotary drill bit, method for its mounting and method for its manufacturing |
| 09/11/1996 | EP0731249A2 Blade drill bit and method for its manufacture |
| 09/11/1996 | EP0702746A4 System for in situ replacement of cutting means for a ground drill |
| 09/11/1996 | EP0677136B1 A means of mounting a revolving cutting element |
| 09/11/1996 | CN2235014Y Anti-oblique four-scraper bit |
| 09/11/1996 | CN2235013Y Column type low-temp diffusive welded polycrystalline diamond compact bit |
| 09/11/1996 | CN2235012Y Improved tool for drilling whole tube-in-tube foundation pile |
| 09/11/1996 | CN2235011Y Hydraulic auxiliary rock-breaking bit with self-sharpening cutting teeth |
| 09/10/1996 | US5553682 Rock drill |
| 09/10/1996 | US5553681 Rotary cone drill bit with angled ramps |
| 09/05/1996 | DE19507213A1 Drill bit carrier with replaceable cutting edges also includes improved pilot drill for accuracy |
| 09/04/1996 | EP0730082A2 Drill bit for percussive drilling |
| 09/03/1996 | US5551760 Tungsten carbide insert for a cutting tool |
| 09/03/1996 | US5551522 Drill bit having stability enhancing cutting structure |
| 08/28/1996 | EP0728915A2 Method and apparatus for monitoring and recording of operating conditions of a downhole drill bit during drilling operations |
| 08/28/1996 | EP0728912A2 Method of manufacturing a rotary drill bit |
| 08/28/1996 | EP0728050A1 Method and system of trajectory prediction and control using pdc bits |
| 08/27/1996 | US5549171 Drill bit with performance-improving cutting structure |
| 08/22/1996 | WO1996025581A1 Cutter for a boring head |
| 08/22/1996 | CA2210476A1 Cutter for a boring head |
| 08/20/1996 | US5547033 Rotary cone drill bit and method for enhanced lifting of fluids and cuttings |
| 08/15/1996 | WO1996024744A1 Improvements in or relating to drill bits |
| 08/14/1996 | EP0726382A2 Rotary drilling tool |
| 08/14/1996 | EP0725886A1 Device and method for augering a conical hole in solid media |
| 08/13/1996 | US5544713 Cutting element for drill bits |
| 08/13/1996 | US5544550 Fabrication method for rotary bits and bit components |
| 08/13/1996 | CA2025853C Double seal with lubricant gap between seals for sealed rotary drill bits |
| 08/10/1996 | CA2142167A1 Mounting drill buttons |