| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 06/09/1994 | WO1994012760A1 Drilling apparatus |
| 06/08/1994 | EP0600824A1 Method for manufacturing a diamond core bit |
| 06/08/1994 | EP0599954A1 Core cutter head |
| 06/01/1994 | EP0599596A1 Drill bits |
| 06/01/1994 | CN1087397A Apparatus and method for forming piles |
| 05/31/1994 | US5316095 Drill bit cutting element with cooling channels |
| 05/26/1994 | DE4308856C1 Drilling appts. for producing tubed deep bore, partic. for pile foundations - involves rope excavator with free fall device to which a tube rotary machine is linked |
| 05/25/1994 | EP0548163B1 Self-shaping drill cutting edge |
| 05/24/1994 | US5314033 Drill bit having combined positive and negative or neutral rake cutters |
| 05/24/1994 | US5314030 System for continuously guided drilling |
| 05/18/1994 | EP0466702B1 Coupling for drilling machine with dust extractor |
| 05/17/1994 | US5311959 Mine tool roof bit insert |
| 05/17/1994 | US5311958 Earth-boring bit with an advantageous cutting structure |
| 05/11/1994 | EP0466852B1 Self-drilling fastening |
| 05/10/1994 | US5310015 Insert spacer assembly |
| 05/04/1994 | EP0595214A2 Rock drill |
| 05/03/1994 | US5308150 Cutter head for a rock boring apparatus |
| 05/03/1994 | US5307887 Earth boring bit with improved thrust bearing |
| 05/03/1994 | US5307886 Method for casing a hole drilled in a formation |
| 05/03/1994 | CA1329194C Ice auger |
| 04/28/1994 | WO1994009244A1 Underreamer |
| 04/26/1994 | US5305840 Rock bit with cobalt alloy cemented tungsten carbide inserts |
| 04/20/1994 | EP0593268A2 Rolling cutter drill bits |
| 04/19/1994 | US5304342 Carbide/metal composite material and a process therefor |
| 04/19/1994 | US5303787 Rotary mining tools |
| 04/19/1994 | US5303785 Diamond back-up for PDC cutters |
| 04/19/1994 | US5303784 Drilling apparatus |
| 04/19/1994 | CA1328655C Rotary drill |
| 04/13/1994 | EP0592210A2 Cutting element for rotary drag drillbit |
| 04/13/1994 | EP0591196A1 Method and apparatus for jet cutting |
| 04/13/1994 | CN2161716Y Convex prism type PDC drill bit puller |
| 04/13/1994 | CN2161715Y Steel body PDC drill bit with step diameter keeping structure |
| 04/12/1994 | US5301763 Apparatus for drilling holes in mine roofs and a roof drill bit for use therein |
| 04/12/1994 | US5301762 Rock drilling |
| 04/12/1994 | CA1328448C Drilling equipment |
| 04/05/1994 | US5299471 Cutting insert for a rotary cutting tool |
| 04/05/1994 | CA1328252C Hammer drills for making boreholes |
| 03/31/1994 | EP0678149A4 Masonry coring system. |
| 03/29/1994 | US5297643 For drilling holes in a work surface |
| 03/29/1994 | US5297630 Downhole milling tool |
| 03/23/1994 | EP0588143A1 Earth drill for placing a concrete pile in situ |
| 03/22/1994 | US5295766 Apparatus and method for building a foundation for uprights or for making passages therethrough |
| 03/22/1994 | US5295735 Rock saw |
| 03/22/1994 | US5295549 Mechanical lock to prevent seal ring rotation |
| 03/15/1994 | US5294059 Device for directing the flow of an atomized slurry |
| 03/15/1994 | US5293946 Divergent fluid nozzle for drilling tool |
| 03/12/1994 | CA2105190A1 Segmented diamond compact |
| 03/08/1994 | US5291957 Cutting tool for the erosion of a surface |
| 03/08/1994 | US5291807 Patterned hardfacing shapes on insert cutter cones |
| 03/03/1994 | WO1994004790A1 Protective arrangements for downhole tools |
| 03/02/1994 | EP0585110A2 Means for mounting a roller cutter on a drill bit and method of manufacturing such a drill bit |
| 03/02/1994 | EP0585106A2 Threaded retention ring for roller bit and method for manufacturing such a bit |
| 03/02/1994 | EP0584475A1 Drilling device provided with an acceleration nozzle |
| 03/02/1994 | EP0584255A1 Rotary mining tools |
| 03/02/1994 | CN2157979Y Drill bit |
| 03/01/1994 | US5289889 Roller cone core bit with spiral stabilizers |
| 02/23/1994 | EP0583629A1 Core bit comprising removable toothed elements with a peripheral distribution |
| 02/23/1994 | CN2157299Y Dire cutting type roller bit |
| 02/22/1994 | US5288556 Machines; vehicles |
| 02/22/1994 | US5288173 Method for the directional control of an earth boring device as well as apparatus for making earth bores |
| 02/22/1994 | US5287937 Drill bits and the blades therefor |
| 02/22/1994 | US5287936 Rolling cone bit with shear cutting gage |
| 02/22/1994 | CA1327196C Rotary cutting tool |
| 02/16/1994 | EP0397872B1 Well expander |
| 02/16/1994 | CN1082138A Hole opener for the top hole section of oil/gas wells |
| 02/15/1994 | US5285859 Drill bit cutter mounting system providing selectable orientation of the cutting element |
| 02/09/1994 | EP0582484A1 Tool insert |
| 02/08/1994 | US5284394 Ball and roller bearings and bearing components |
| 02/08/1994 | US5284216 Down-the-hole drill tool for drilling in advance of a casing tube |
| 02/08/1994 | US5284215 Earth-boring drill bit with enlarged junk slots |
| 02/03/1994 | WO1994002687A1 Apparatus and method for forming piles |
| 02/02/1994 | EP0581534A1 Cutting insert for an abrasive tool and method of mounting |
| 02/01/1994 | USRE34526 Two cone bit with non-opposite cones |
| 02/01/1994 | US5282513 Thermally stable polycrystalline diamond drill bit |
| 02/01/1994 | US5282512 Drilling tool with rotating conical rollers |
| 02/01/1994 | US5282509 Method for cleaning cement plug from wellbore liner |
| 02/01/1994 | CA2100137A1 Drilling apparatus |
| 02/01/1994 | CA1326660C Drilling apparatus and cutter |
| 02/01/1994 | CA1326599C Manufacture of abrasive products |
| 02/01/1994 | CA1326598C Manufacture of abrasive products |
| 01/26/1994 | EP0579662A1 Cutting composite formed of cemented carbide substrate and diamond layer. |
| 01/26/1994 | CN2154341Y Double-ring bit |
| 01/25/1994 | US5281260 Rolling cone, cutter cone, sintered hard metal insert having tungsten carbide in binder matrix containing cobalt, nickel |
| 01/19/1994 | EP0579376A1 Carbide/metal composite material and a process therefor |
| 01/19/1994 | CN2153629Y Drill bit |
| 01/18/1994 | US5279901 Cemented carbide body with extra tough behavior |
| 01/18/1994 | US5279375 Multidirectional drill bit cutter |
| 01/18/1994 | US5279374 Downhole drill bit cone with uninterrupted refractory coating |
| 01/12/1994 | EP0578034A1 Method and device for drilling an earth borehole |
| 01/12/1994 | CN1080686A Perfusion pile under-reaming press head and reaming method |
| 01/05/1994 | EP0577545A1 Drill bit |
| 01/04/1994 | CA1325802C Cutting tool for removing man-made members from well bore |
| 12/29/1993 | EP0575922A2 Displacement drill |
| 12/28/1993 | US5273557 Twist drills having thermally stable diamond or CBN compacts tips |
| 12/28/1993 | US5273125 Fixed cutter bit with improved diamond filled compacts |
| 12/23/1993 | WO1993025795A1 Rolling cone bit with wear resistant insert |
| 12/23/1993 | WO1993025794A1 Well drilling tools |
| 12/22/1993 | EP0575198A1 Drill bit with improved cutter sizing pattern |
| 12/22/1993 | CN2150322Y Steel-body PDC drilling-bit with two core |
| 12/21/1993 | US5271472 Drilling with casing and retrievable drill bit |