| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 02/09/1993 | US5184689 Radial cut drill bit insert |
| 02/09/1993 | US5184687 Well reamer |
| 02/09/1993 | CA1313524C Cutting tool for removing materials from well bore |
| 02/03/1993 | EP0525991A1 Sidewall coring tool |
| 02/02/1993 | US5183123 Indicating means for a rock bit lubricating system |
| 02/02/1993 | US5182971 Button sharpening |
| 01/26/1993 | USRE34167 Drill bit and roller cutter for said drill bit |
| 01/26/1993 | US5181938 Cobalt-bound diamond tools, a process for their manufacture and their use |
| 01/26/1993 | US5181577 Device for fixing disk cutter to tunnel excavator |
| 01/20/1993 | EP0523093A1 Ring clamp for a cutter ring in a tunnel drilling machine. |
| 01/19/1993 | US5180209 Apparatus for cutting recessed grooves into concrete and rock material |
| 01/19/1993 | US5180022 Rotary mining tools |
| 01/13/1993 | EP0522553A1 Drill bit having enhanced stability |
| 01/13/1993 | EP0522446A2 Method for controlling the direction of an earth drilling apparatus and device for making bore holes |
| 01/12/1993 | US5178222 Drill bit having enhanced stability |
| 01/07/1993 | EP0521601A1 Aluminide coated bearing elements for roller cutter drill bits |
| 01/06/1993 | CA2067845A1 Aluminide coated bearing elements for roller cutter drill bits |
| 01/05/1993 | US5176212 Combination drill bit |
| 12/30/1992 | EP0298114B1 Rotary drill bit |
| 12/30/1992 | CN2126306U Pile-poured-into drill bit for enlarging borehole |
| 12/29/1992 | US5174396 Cutter assemblies for rotary drill bits |
| 12/29/1992 | US5174390 Modular cluster drill apparatus |
| 12/29/1992 | US5174374 Clean-out tool cutting blade |
| 12/22/1992 | US5173090 Rock bit compact and method of manufacture |
| 12/22/1992 | US5172779 For a rolling cone rock bit |
| 12/22/1992 | US5172778 Drill bit cutter and method for reducing pressure loading of cutters |
| 12/22/1992 | US5172777 Inclined chisel inserts for rock bits |
| 12/22/1992 | US5172775 Rotary drill bit insert |
| 12/22/1992 | CA1311745C Drill bit having improved cutter configuration |
| 12/22/1992 | CA1311744C Cutting elements for rotary drill bits |
| 12/22/1992 | CA1311743C Method and apparatus for taking core samples |
| 12/16/1992 | EP0517731A1 Apparatus and method for building a foundation for uprights or for making passages therethrough. |
| 12/16/1992 | CN1067092A Bottom jet regulator used on drill bit |
| 12/12/1992 | CA2070965A1 Drilling tool with rotary conical cutting wheels |
| 12/10/1992 | WO1992021849A1 Drilling apparatus |
| 12/09/1992 | EP0517343A1 Casing mill and manufacturing method |
| 12/09/1992 | EP0517329A1 Hollow auger for casting piles in situ, and drilling device including at least two such augers |
| 12/09/1992 | CN2124302U Upper slope directed type lengthened nozzle for bit |
| 12/08/1992 | US5168942 For measuring earth formation while drilling in an earth formation |
| 12/08/1992 | US5168940 Profile melting-drill process and device |
| 12/08/1992 | CA1311234C Earth boring drill bit with matrix displacing material |
| 12/04/1992 | CA2043781A1 Bearings for roller cutter assembly |
| 12/02/1992 | EP0516599A1 Device in hammer machines |
| 12/02/1992 | EP0516581A2 Drilling and chiselling tool with basic body and cutting element |
| 12/02/1992 | EP0515780A1 Earth boring bit with protected seal means |
| 12/02/1992 | CN2123599U Short-curvature radius horizontal well screw arbor drilling tool |
| 11/26/1992 | WO1992020897A1 Rotary mining tools |
| 11/25/1992 | EP0515004A1 Cutting tool and method for removing materials from well bore |
| 11/24/1992 | US5165494 Rotary drills bits |
| 11/18/1992 | CN1066205A Low temp. electroplating combined diamond drill and mfg. process |
| 11/18/1992 | CN1019077B Extra hard rock inserting diamond tool making method |
| 11/17/1992 | US5163524 Rotary drill bits |
| 11/11/1992 | EP0512330A1 Drill bit |
| 11/11/1992 | EP0512329A2 Core bit with hydrodynamic core destruction |
| 11/11/1992 | EP0511954A1 Ring cutter for tunnel drilling in rock |
| 11/10/1992 | US5161898 Bit body with upper end adapted to be detachably connected to drill string for drill bit, projecting leg with journal on lower end, roller cutter mounted for rotation on journal, superalloy bearing from nickel, cobalt or iron |
| 11/10/1992 | US5161859 Excavating tool cutting insert |
| 11/10/1992 | US5161627 For a mining machine |
| 11/05/1992 | DE4114270A1 Drill or chisel tool mounting body and cutting head - has two types of solder connection to absorb wider range of stress changes |
| 11/05/1992 | DE4114267A1 Drill or chisel tool mounting body - has mount shaped to reduce stiffness in zones of high stress to lower danger of metal fracture |
| 11/04/1992 | EP0511547A2 Rock bit |
| 11/04/1992 | EP0511298A1 Drilling tool for percussive and rotary drilling. |
| 11/03/1992 | US5159857 Fixed cutter bit with improved diamond filled compacts |
| 11/02/1992 | CA2066296A1 Rock bit |
| 10/29/1992 | WO1992018705A1 Maintenance and extraction of poles |
| 10/29/1992 | WO1992016712A3 Masonry coring system |
| 10/28/1992 | EP0511200A1 Drill bit respectively cutter |
| 10/28/1992 | EP0510531A1 Method of hardfacing milled teeth formed on a cutter cone of a milled tooth rotary cone rock bit. |
| 10/27/1992 | US5158148 Tungsten carbide particles pressed with excess carbon at high temperature and pressure; uniform dispersion in matrix; hardness, density, wear resistance |
| 10/27/1992 | US5158147 Auger cutter head |
| 10/25/1992 | CA2065481A1 Hardfaced mill tooth rotary cone rock bit |
| 10/21/1992 | EP0340280A4 Self-propelled subsoil penetrating tool system |
| 10/21/1992 | CN2119491U Conical impacter with two leaves |
| 10/21/1992 | CN1065507A Hard-alloy roller-type bit with sliding bearings |
| 10/14/1992 | EP0508001A1 Lubricant system for a rotary cone rock bit |
| 10/14/1992 | CN2118807U Separately welded teeth claw and shaft neck teeth wheel drill |
| 10/14/1992 | CN2118806U Hollow adjustable displacement screw rod drill |
| 10/14/1992 | CN2118805U Punching and grabing awl head |
| 10/14/1992 | CN1065316A Drilling bit with scraper and its mfg |
| 10/13/1992 | US5154245 Diamond rock tools for percussive and rotary crushing rock drilling |
| 10/13/1992 | CA1308578C Manufacture of cutting structures for rotary drill bits |
| 10/07/1992 | EP0506689A1 Drilling tool for widening a bore well. |
| 10/06/1992 | US5152353 High speed rock bit |
| 10/06/1992 | US5152194 Hardfaced mill tooth rotary cone rock bit |
| 10/06/1992 | CA1308407C Methods and apparatus for establishing hydraulic flow regime in drill bits |
| 10/06/1992 | CA1308264C Tool component |
| 10/01/1992 | WO1992016717A1 Gravel pack well completions with auger-liner |
| 10/01/1992 | WO1992016712A2 Masonry coring system |
| 10/01/1992 | DE4110245A1 Drill head with hard metal cutters - has main cutter provided with outwardly curved section extending over greater part of total length of main and adjoining cutters |
| 09/30/1992 | EP0506238A2 Composite cutting insert |
| 09/30/1992 | EP0505490A1 Downhole drill bit and bit coupling |
| 09/30/1992 | CN1064911A Vane-type power drilling tool for well |
| 09/29/1992 | US5151107 Abrasive cutters of multilayer structure |
| 09/29/1992 | US5150755 Cutting through the walls of a pair of casings |
| 09/29/1992 | US5150636 Rock drill bit and method of making same |
| 09/23/1992 | CN1064643A Drill bit for producing drillde holes with under cut |
| 09/22/1992 | US5148880 Apparatus for drilling a horizontal controlled borehole in the earth |
| 09/22/1992 | US5148879 Spindle cap bearing for rotary cone rock bits |
| 09/17/1992 | WO1992015427A1 Cutting composite formed of cemented carbide substrate and diamond layer |
| 09/17/1992 | DE4107834A1 Hollow displacement auger - has drive shaft extending longitudinally through its centre, with pointed tip, and has anti-buckling discs fitted at intervals along drive shaft, requiring minimum torque for control |