| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 07/20/1993 | CA1320482C Drilling bit with improved trailing edge vent |
| 07/14/1993 | CN2138185Y Wedge tooth hobbing cutter |
| 07/14/1993 | CN1074267A Rock drill bit and method of making same |
| 07/13/1993 | US5226489 Insert spacer assembly |
| 07/08/1993 | WO1993013290A1 Drill bit with improved insert cutter pattern |
| 07/06/1993 | US5224560 Modular drill bit |
| 07/06/1993 | CA1319930C Roller drill bit having radial-thrust pilot bushing incorporating anti-galling material |
| 06/30/1993 | EP0548765A2 System for soil decontamination using recoverable extraction and injection probes |
| 06/29/1993 | US5222566 Rotary drill bits and methods of designing such drill bits |
| 06/29/1993 | CA1319676C Rotary drill bit |
| 06/24/1993 | WO1993012320A1 Cutter of a boring head, hub for the cutter and method of manufacturing such a hub |
| 06/24/1993 | CA2125191A1 Cutter of a boring head, hub for the cutter and method of manufacturing such a hub |
| 06/23/1993 | CN1073376A LF self-oscillation cavitation pulse jet nozzle and production method thereof |
| 06/22/1993 | US5220967 Drill and self-centering cutter insert therefor |
| 06/22/1993 | US5220966 Drilling apparatus of the cutting and shearing type |
| 06/22/1993 | US5220964 Downhole compaction and stabilization back reamer and drill bit |
| 06/21/1993 | CA2084227A1 Recoverable extraction and injection probe for enhanced gradient remediation |
| 06/17/1993 | DE4141045A1 Drill tool with central bit and quick release - uses laterally actioned catch which is released by relative rotation of two parts of drill tool |
| 06/16/1993 | EP0547012A2 Composite insert for cutting tools |
| 06/16/1993 | EP0546725A1 Improvents in or relating to cutting elements for rotary drill bits |
| 06/16/1993 | EP0546523A1 Earth-boring drill bit with enlarged junk slots |
| 06/15/1993 | US5219246 Drills for piles and soil stabilization, and drilling method |
| 06/11/1993 | CA2077055A1 Earth boring drill bit with enlarged junk slots |
| 06/09/1993 | CN2135641Y Coal electric drill bit |
| 06/08/1993 | US5217081 Tools for cutting rock drilling |
| 06/08/1993 | CA1318910C Rotary drill bit |
| 05/26/1993 | CN2134480Y Bit spray nozzle changing nozzle diameter along with drilling |
| 05/25/1993 | US5213459 Self-drilling connecting unit |
| 05/25/1993 | US5213171 Diamond drag bit |
| 05/25/1993 | US5213170 Footing auger |
| 05/21/1993 | CA2055926A1 Expandable drill |
| 05/19/1993 | EP0542704A1 Cemented carbide body with increased wear resistance |
| 05/19/1993 | EP0542237A1 Drill bit cutter and method for reducing pressure loading of cuttings |
| 05/19/1993 | EP0541942A1 Drill tube |
| 05/19/1993 | CN2133662Y Percussion drilling tool for porous gravel layer |
| 05/19/1993 | CN2133661Y Bearizing bit |
| 05/19/1993 | CN1072237A Cold headed center vacuum drill bit |
| 05/15/1993 | CA2076457A1 Drill bit cutter and method for reducing pressure loading of cuttings |
| 05/14/1993 | CA2082680A1 Cemented carbide body with increased wear resistance |
| 05/14/1993 | CA2055399A1 Indicating means for a rock bit lubricating system |
| 05/13/1993 | DE4134912A1 Impact tool for pipe jacking through ground - consists of driving tube with cutting head housing piston, which activates chisel headed striker |
| 05/10/1993 | CA2081681A1 Boring tube |
| 05/05/1993 | CN2131968Y Diamond bit for petroleum drilling in super-soft stratum |
| 05/05/1993 | CN2131967Y Bottom expanding unit for drilled stake hole |
| 05/04/1993 | US5207283 Reversible bit bearing |
| 05/04/1993 | US5207280 Device in hammer machines |
| 05/04/1993 | CA1317282C Rotary drill bit |
| 04/29/1993 | WO1993008365A1 Pulsation nozzle, for self-excited oscillation of a drilling fluid jet stream |
| 04/29/1993 | CA2121232A1 Pulsation nozzle, for self-excited oscillation of a drilling fluid jet stream |
| 04/27/1993 | US5206221 Removal of cytotoxic lymphocytes |
| 04/27/1993 | US5205684 Multi-component cutting element using consolidated rod-like polycrystalline diamond |
| 04/27/1993 | US5205366 Superposed drilling device |
| 04/22/1993 | DE4134425A1 Rotary drilling head with cutter supports - has hard metal cutters welded to twin holders and supported at back and underneath |
| 04/21/1993 | EP0537624A1 Reaming tool |
| 04/21/1993 | CN1071223A Disc drill bit |
| 04/14/1993 | EP0536762A1 Diamond cutter insert with a convex cutting surface |
| 04/13/1993 | US5201817 Downhole cutting tool |
| 04/13/1993 | US5201795 Rock bit manufacturing method |
| 04/13/1993 | US5201376 Rock bit with improved gage insert |
| 04/06/1993 | US5199832 For a rotary drag bit for earth boring |
| 04/06/1993 | US5199516 Modular drill bit |
| 04/06/1993 | US5199512 Method of an apparatus for jet cutting |
| 04/06/1993 | US5199511 Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations |
| 04/01/1993 | WO1993006332A1 Rock-drilling bit |
| 04/01/1993 | WO1993006311A1 Excavating apparatus |
| 03/31/1993 | EP0534370A1 Diamond drag bit |
| 03/31/1993 | EP0534037A1 Disc drill bit |
| 03/30/1993 | US5197833 Drill tool for making a drilled hole with an undercut |
| 03/30/1993 | US5197556 Roof drill brazing shim |
| 03/30/1993 | US5197555 Rock bit with vectored inserts |
| 03/30/1993 | US5197554 Rotary drill bit for drilling through sticky formations |
| 03/30/1993 | US5197553 Drilling with casing and retrievable drill bit |
| 03/24/1993 | EP0533550A1 Divergent nozzle for drilling tool and tool using this nozzle |
| 03/24/1993 | EP0532869A1 Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations |
| 03/24/1993 | CN2128667Y Drill nozzle special tool |
| 03/23/1993 | US5195403 Composite cutting insert |
| 03/23/1993 | CA1314866C Reinforced rotary drill bit |
| 03/18/1993 | WO1993005264A1 Core cutter head |
| 03/18/1993 | DE4200580A1 Gesteinsbohrkrone Gesteinsbohrkrone |
| 03/17/1993 | CA2073995A1 Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations |
| 03/10/1993 | CN1069791A Screwarbor drilling tool rotor with nitridizing surface treatment |
| 03/09/1993 | CA1314282C Cutter elements for hollow drill bit |
| 03/09/1993 | CA1314281C Diamond drill bit |
| 03/03/1993 | CN1069557A Floating metal sealing device for gear wheel drill head |
| 03/03/1993 | CN1069549A Draw and insert-type eccentric-hole enlarging drilling device |
| 03/03/1993 | CN1069548A Gear-wheel bit |
| 03/02/1993 | US5190379 Bearings for roller cutter assembly |
| 03/02/1993 | US5190353 Rock cutting tool having eccentric drive |
| 03/02/1993 | US5190113 Reamer |
| 03/02/1993 | US5189932 Rock bit manufacturing method |
| 02/24/1993 | CN2127427Y Flat nozzle on bit |
| 02/23/1993 | US5188462 Lubricant system for a rotary cone rock bit |
| 02/17/1993 | EP0527506A2 Tungsten carbide inserts for rock bits |
| 02/16/1993 | US5186268 Rotary drill bits |
| 02/16/1993 | US5186267 Journal bearing type rock bit |
| 02/16/1993 | US5186266 Multi-walled drill string for exploration-sampling drilling systems |
| 02/16/1993 | US5186265 Retrievable bit and eccentric reamer assembly |
| 02/16/1993 | CA2049282A1 Earth boring rotary reamer |
| 02/09/1993 | US5184925 Insert and insert support bar |
| 02/09/1993 | US5184918 Recoverable tunnelling machine |