| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 05/14/1992 | WO1992008033A1 Modular drill bit |
| 05/13/1992 | EP0485052A1 Boring head and method for directional drilling in the ground |
| 05/13/1992 | CN2104286U Three-gear wheel extension spray nozzle drill bit |
| 05/13/1992 | CN2104285U Dual-moving water-stop single bit rope coring drill apparatus |
| 05/12/1992 | US5111895 Diamond bonded to metal |
| 05/12/1992 | US5111894 Uninterrupted drill bit |
| 05/12/1992 | US5111893 Device for drilling in and/or lining holes in earth |
| 05/12/1992 | US5111892 Imbalance compensated drill bit with hydrostatic bearing |
| 05/12/1992 | US5111891 Boring head for a subsurface soil-boring apparatus |
| 05/09/1992 | CA2046417A1 Boring head for a subsurface soil-boring apparatus |
| 05/05/1992 | US5109935 Rotary drill bits |
| 05/05/1992 | CA1300124C Erosion resistant rock drill bit |
| 04/29/1992 | CN2103118U Verify apparatus under-reaming bottom pile |
| 04/28/1992 | US5108813 Sliding member |
| 04/28/1992 | US5107936 Rock melting excavation process |
| 04/28/1992 | CA1299559C Expandable stabilizer |
| 04/21/1992 | US5106393 Diamond compact possessing low electrical resistivity |
| 04/15/1992 | EP0480895A2 Improved diamond tools for rock drilling, metal cutting and wear part applications |
| 04/15/1992 | EP0480263A1 Core drill bit |
| 04/15/1992 | CN2101742U Seizing-proof rock-drill bit |
| 04/15/1992 | CN2101741U Heavy calibre step borehole roller drill set for bed rock |
| 04/15/1992 | CN2101740U Quasi-involute form tooth drill bit |
| 04/15/1992 | CN1060331A Dry hollow diamond drilling bit |
| 04/14/1992 | US5104262 Tunnel boring machine |
| 04/14/1992 | US5103922 Drilling subterranean formation |
| 04/14/1992 | US5103705 Eccentrically arranged radial boring tool apparatus |
| 04/12/1992 | CA2053149A1 Diamond tools for rock drilling, metal cutting and wear part applications |
| 04/09/1992 | DE4032066A1 Fixing of cutter insert studs in rock drill crown - involves several studs fixed at angle in preformed recesses with press fit |
| 04/09/1992 | DE4032064A1 Drill crown used in mining - has shaft with cone-shaped faceted end and suitably recessed head |
| 04/08/1992 | CN1016202B Hammer drills for making boreholes |
| 04/08/1992 | CN1016201B Well reamer |
| 04/07/1992 | US5101692 Drill bit or corehead manufacturing process |
| 04/07/1992 | US5101691 Methods of manufacturing cutter assemblies for rotary drill bits |
| 04/01/1992 | EP0296208B1 Inclined jet drilling tool |
| 04/01/1992 | CN2100476U Threaded connection slotting drill bit |
| 03/31/1992 | US5099935 Reinforced rotary drill bit |
| 03/31/1992 | US5099934 Rotary drill bits |
| 03/31/1992 | US5099932 Rock drill bit lubricant circulating system |
| 03/31/1992 | US5099929 Unbalanced PDC drill bit with right hand walk tendencies, and method of drilling right hand bore holes |
| 03/31/1992 | CA1298277C Nozzle assembly for rotary drill bit and method of installation |
| 03/25/1992 | EP0476505A2 Shale diverting means for a sealed bearing drill bit |
| 03/25/1992 | EP0476496A1 Process for fabrication of a bimetallic casting and a wear resisting part according to said process |
| 03/25/1992 | EP0476352A1 Earth boring drill bit with improved wear inserts |
| 03/18/1992 | CN2099225U Floating metal sealing apparatus of year bit |
| 03/18/1992 | CN2099186U Variable-diameter coal-unloading drill |
| 03/17/1992 | US5096465 Superhard metal-coated particles, binder alloy, drill bits for soft rock formations such as shale |
| 03/17/1992 | US5096352 Diamond coated fasteners |
| 03/17/1992 | US5096344 Drill bit having bulb-like shank enlargements to reduce jamming |
| 03/17/1992 | US5096005 Hydraulic action for rotary drill bits |
| 03/15/1992 | WO1992005335A1 Self-shaping drill cutting edge |
| 03/15/1992 | CA2091676A1 Self-shaping drill cutting edge |
| 03/12/1992 | DE4028830A1 Drilling and cutting tool - is of variable dia. and is designed for working in concrete and similar materials |
| 03/11/1992 | EP0474092A2 Using thermally-stable diamond or CBN compacts as tips for rotary drills |
| 03/11/1992 | CN2098547U Edge of hackle-type scraping drill bit with automatic blade feeding |
| 03/05/1992 | WO1992004528A1 Method and apparatus for jet cutting |
| 03/05/1992 | CA2087539A1 Method and apparatus for jet cutting |
| 03/05/1992 | CA2049663A1 Using thermally-stable diamond or cbn compacts as tips for rotary drills |
| 03/04/1992 | EP0472809A1 Seal assembly for roller cutter drill bit having a pressure balanced lubrication system |
| 03/03/1992 | US5092412 Earth boring bit with recessed roller bearing |
| 03/03/1992 | CA1296708C Rotary drill bit |
| 03/03/1992 | CA1296533C Tool component |
| 03/01/1992 | CA2049903A1 Earth boring drill bit with improved wear inserts |
| 03/01/1992 | CA2044069A1 Controlled true geometry rock bit with one piece body |
| 02/28/1992 | CA2048500A1 Fluid flow control and mechanical actuation system for operating a down-hole tool |
| 02/25/1992 | US5090492 Drill bit with vibration stabilizers |
| 02/25/1992 | US5090491 Earth boring drill bit with matrix displacing material |
| 02/25/1992 | US5090480 Underreamer with simultaneously expandable cutter blades and method |
| 02/25/1992 | CA1296320C Mining process and apparatus |
| 02/20/1992 | DE4132656A1 Method for well boring - involves using tube well as borehole liners |
| 02/19/1992 | CN2096629U Sealed diamond bit for taking core |
| 02/19/1992 | CN2096628U Cutter bit with round spray nozzle |
| 02/19/1992 | CN1058824A Low friction subterranean drill bit and related methods |
| 02/19/1992 | CN1058743A Drill bit for producing cylindrical drilled holes |
| 02/14/1992 | CA2044070A1 Friction bearing and cone retention thrust system for a rock bit |
| 02/14/1992 | CA2039914A1 Seal assembly for roller cutter drill bit having a pressure balanced lubrication system |
| 02/12/1992 | EP0470354A1 Drill to make cylindrical holes |
| 02/12/1992 | EP0269653B1 Apparatus for correcting irregularities in or enlarging an underground duct |
| 02/11/1992 | US5086852 Fluid flow control system for operating a down-hole tool |
| 02/11/1992 | US5086838 Tapered cutting tool for reaming tubular members in well bore |
| 02/11/1992 | CA1295605C Drill tool |
| 02/07/1992 | CA2048412A1 Drill bit having bulb-like shank enlargements to reduce jamming |
| 02/05/1992 | CN1015381B Tooth strengthening process of steel toothed annular bit |
| 02/04/1992 | US5085026 Conical seismic anchor and drill bit for use with unreinforced masonry structures |
| 02/04/1992 | CA1295321C Large compact cutter rotary drill bit utilizing directed hydraulics for eachcutter |
| 01/29/1992 | EP0468515A1 Excavation tool |
| 01/28/1992 | CA2022193A1 Method and equipment for loosening and/or winning minerals especially coal and aggregated materials by using compressed air breaking |
| 01/28/1992 | CA1294800C Method of remanufacturing a rock drill bit |
| 01/22/1992 | EP0467871A2 O-ring seal for rock bit bearings |
| 01/22/1992 | EP0467870A1 Roller tooth bit with heel row cutter inserts |
| 01/22/1992 | EP0467642A2 Earth drilling system and method for controlling the direction of a borehole |
| 01/22/1992 | EP0467580A1 Subterranean drill bit and related methods |
| 01/22/1992 | EP0466852A1 Self-drilling fastening. |
| 01/22/1992 | EP0466702A1 Coupling for drilling machine with dust extractor. |
| 01/22/1992 | CN2093895U Borehole-enlarging and cleaning-out drill bit for filling piles |
| 01/22/1992 | CN2093894U Combined drill bit with a lengthened nozzle and a central nozzle |
| 01/21/1992 | US5082070 Hollow drill bit |
| 01/18/1992 | CA2047316A1 Drilling system and method for controlling the direction of holes being drilled or cored in subsurface formations |
| 01/17/1992 | WO1992001856A1 Variable geometry cluster drill |
| 01/17/1992 | CA2086758A1 Variable geometry cluster drill |
| 01/16/1992 | DE4021383A1 Extruded hard metal or ceramic rods |