| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 08/08/1996 | WO1996023954A1 Spherical reaming bit |
| 08/08/1996 | WO1996013968A3 Cutting insert for a cutting tool |
| 08/07/1996 | CN1128321A Drilling tool with support and cutting head |
| 08/07/1996 | CN1032499C Perfusion pile under-reaming press head and reaming method |
| 08/06/1996 | USH1566 Matrix diamond drag bit with PCD cylindrical cutters |
| 08/06/1996 | US5542486 Method of and apparatus for single plenum jet cutting |
| 08/06/1996 | US5542485 Earth-boring bit with improved cutting structure |
| 08/06/1996 | US5542483 Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes |
| 07/30/1996 | US5541006 Carbides with tungsten and cobalt or cobalt alloys with binders in a powder blend, sintering to form monolithic component |
| 07/25/1996 | WO1996022449A1 Hydrodynamic bearing |
| 07/25/1996 | WO1996022448A1 Cutter assembly having a plurality of independently rotatable cutting units thereon |
| 07/25/1996 | DE19601237A1 Rock drilling bit and anchor for hard or soft stone |
| 07/25/1996 | CA2208713A1 Cutter assembly having a plurality of independently rotatable cutting units thereon |
| 07/24/1996 | EP0723066A2 Earth-boring bit with improved cutting structure |
| 07/23/1996 | US5538093 High flow weld-in nozzle sleeve for rock bits |
| 07/16/1996 | US5535839 Roof drill bit with radial domed PCD inserts |
| 07/16/1996 | US5535838 High performance overlay for rock drilling bits |
| 07/16/1996 | US5535836 Total recovery drill |
| 07/11/1996 | WO1996021080A1 Roller cone rock bit having improved cutter cone gauge face surface compacts and a method of construction |
| 07/10/1996 | EP0720879A2 Improvements in or relating to elements faced with superhard material |
| 07/10/1996 | EP0720683A1 A cutter for a boring head, a device for accommodating thermally expanding grease, and a method of greasing bearings in a cutter |
| 07/10/1996 | EP0720682A1 Disc cutter |
| 07/09/1996 | US5533582 Drill bit cutting element |
| 07/04/1996 | WO1996020069A1 Improved segmented cutting tools |
| 07/04/1996 | WO1996020058A1 Composite cermet articles and method of making |
| 07/04/1996 | WO1996020057A1 Composite cermet articles and method of making |
| 07/04/1996 | WO1996020056A1 Composite cermet articles and method of making |
| 07/03/1996 | EP0719375A1 Negative pressure vortex nozzle |
| 07/03/1996 | EP0493597B1 Device for fixing disk cutter to tunnel excavator |
| 07/02/1996 | US5531548 Drill for hardly machinable materials and drilling method using the same |
| 07/02/1996 | US5531281 Rotary drilling tools |
| 07/02/1996 | US5531273 Well completion tool and process |
| 07/02/1996 | US5531271 Wellbore tool side support |
| 06/26/1996 | EP0718462A2 Drill bit cutting element and method for mounting a cutting element on a drill bit |
| 06/26/1996 | EP0718461A2 Method and apparatus for laying a conduit in a stop-type trench arrangement |
| 06/26/1996 | EP0717808A1 Apparatus for use in a wellbore |
| 06/22/1996 | CA2157982A1 Hammer rock bit gage protection |
| 06/21/1996 | CA2165730A1 Self-centering polycrystalline diamond drill bit |
| 06/20/1996 | WO1996018798A1 A drilling method and bit assembly to realize the method |
| 06/20/1996 | WO1996018461A1 Method and apparatus for conditioning fluid flow |
| 06/19/1996 | CN1032078C Vane-type power drilling tool for well |
| 06/13/1996 | WO1996018020A1 Rotary cone drill bit with angled ramps |
| 06/13/1996 | WO1996018019A1 Rotary cone drill bit and method for enhanced lifting of fluids and cuttings |
| 06/12/1996 | EP0716215A2 Superhard cutting structures for earth boring with enhanced stiffness and heat transfer capabilities |
| 06/12/1996 | EP0716190A1 Slotting mill |
| 06/12/1996 | CN2228968Y Drill bit prop type reamer |
| 06/12/1996 | CN1124515A Curved drilling apparatus |
| 06/11/1996 | US5524719 Internally reinforced polycrystalling abrasive insert |
| 06/11/1996 | US5524718 Earth-boring bit with improved bearing seal assembly |
| 06/11/1996 | US5524510 Method and apparatus for manufacturing a rock bit leg |
| 06/05/1996 | EP0715055A2 A tool with a holder and cutting element |
| 06/04/1996 | US5522461 Mill valve |
| 05/28/1996 | US5520257 Bit with ball plug compensator having pressure relief means |
| 05/28/1996 | CA2062090C Composite cutting insert |
| 05/23/1996 | WO1996015351A1 A drilling apparatus bit assembly and method to remove drill waste |
| 05/22/1996 | CN2227736Y Special pliers for geotome |
| 05/21/1996 | US5518077 Rotary drill bit with improved cutter and seal protection |
| 05/17/1996 | WO1996013968A2 Cutting insert for a cutting tool |
| 05/15/1996 | EP0584330B1 Reversible bit bearing for percussion drill |
| 05/15/1996 | CN2227192Y Mixed type complete drilling bit |
| 05/15/1996 | CN2227191Y Steel type core bit |
| 05/09/1996 | WO1996013649A1 System, method and cutterhead for dry full-area drilling |
| 05/09/1996 | WO1996013648A1 2-stage underreamer |
| 05/09/1996 | CA2182605A1 System, method and cutterhead for dry full-area drilling |
| 05/08/1996 | EP0710765A2 Improvements relating to rotary drill bits |
| 05/08/1996 | EP0515538B1 A down-the-hole drill tool for drilling in advance of a casing tube |
| 05/08/1996 | CN2226640Y Single barrel multifunctional coring bit |
| 05/07/1996 | US5513715 Flat seal for a roller cone rock bit |
| 05/07/1996 | US5513713 Steerable drillhead |
| 05/07/1996 | US5513711 Sealed and lubricated rotary cone drill bit having improved seal protection |
| 05/01/1996 | EP0708873A1 Downhole milling tool |
| 05/01/1996 | EP0708872A1 Method and apparatus for controlling the head of a drilling or core-drilling device |
| 05/01/1996 | CN2226138Y Hollow rotor screw stem drilling tool with flow stabilizing valve |
| 05/01/1996 | CN1121553A Bit segments for a ground drill bit |
| 04/25/1996 | WO1996012086A1 A rock drill bit and cutting inserts |
| 04/25/1996 | WO1996012085A1 A rock drill bit and cutting inserts |
| 04/25/1996 | WO1996012084A1 Concave cutter bit |
| 04/25/1996 | CA2198102A1 Concave cutter bit |
| 04/24/1996 | CN2225535Y Reducing hole enlarging drill bit with diameter and bottom enlarging function |
| 04/24/1996 | CN2225534Y Wolf teeth type rock drill bit |
| 04/24/1996 | CN1121365A Integrated drilling and rock bolting apparatus |
| 04/23/1996 | US5509490 For preventing mud interference to a portion of a drill string |
| 04/18/1996 | WO1996011323A1 A drilling apparatus and method to drill a hole in different kinds of soil |
| 04/17/1996 | EP0707132A2 Rotary drill bit |
| 04/17/1996 | EP0707131A2 Rotary drill bit with rotatably mounted gauge section for bit stabilisation |
| 04/17/1996 | EP0707130A2 Rotary drill bits |
| 04/17/1996 | EP0707129A2 Drilling tool with tool body and cutting inserts |
| 04/17/1996 | EP0706437A1 Method for supplying cooling medium to a grinding cup and grinding cup to carry out the method |
| 04/16/1996 | US5507357 Pilot bit for use in auger bit assembly |
| 04/16/1996 | US5507355 Cutter of a boring head, hub for the cutter and method of manufacturing such a hub |
| 04/13/1996 | CA2159435A1 Drill bit having stability enhancing cutting structure |
| 04/09/1996 | US5505748 Method of making an abrasive compact |
| 04/09/1996 | US5505273 Compound diamond cutter |
| 04/09/1996 | US5505272 Drill bits |
| 04/04/1996 | CA2158533A1 Drill bit having improved cutting structure with varying diamond density |
| 04/02/1996 | US5503237 Helical drill |
| 04/02/1996 | US5503236 For drilling a borehole in subterranean formations |
| 03/29/1996 | CA2147431A1 Self-propelled earth drilling hammer-bit assembly |
| 03/27/1996 | EP0702746A1 System for in situ replacement of cutting means for a ground drill |
| 03/26/1996 | US5501285 Method for controlling the head of a drilling or core-drilling device and apparatus for carrying out this method |