Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 10 - Drill bits
Patents for E21B 10 - Drill bits (19,464)
11/1998
11/10/1998US5833021 Surface enhanced polycrystalline diamond composite cutters
11/10/1998US5833020 Rolling cone bit with enhancements in cutter element placement and materials to optimize borehole corner cutting duty
11/10/1998US5833017 Cutting bit assembly for impinging an earth strata
11/03/1998US5829541 Polycrystalline diamond cutting element with diamond ridge pattern
11/03/1998US5829540 Mine roof drill bit and cutting insert therefor
11/03/1998US5829539 Rotary drill bit with hardfaced fluid passages and method of manufacturing
11/03/1998CA2151215C Whipstock and staged sidetrack mill
11/03/1998CA2145284C Drilling apparatus
11/02/1998CA2236490A1 Device for widening an earth borehole
10/1998
10/28/1998EP0874128A2 Rotary drill bit having movable formation-engaging members
10/28/1998EP0874127A2 Rotary drill bits with blades and nozzles
10/28/1998EP0874126A1 Method and device for drilling by use of simultaneous percussion and rotation
10/28/1998EP0873464A1 Improvements relating to tunnel-boring machines
10/28/1998EP0771369A4 Method of hard facing a substrate, and weld rod used in hard facing a substrate
10/27/1998US5826651 Wellbore single trip milling
10/22/1998DE19729882C1 Drilling for cast-in-situ pile
10/21/1998EP0872625A2 Rotary drill bits with nozzles
10/21/1998EP0872624A2 Improvements in or relating to rotary drill bits
10/21/1998EP0871556A1 Composite cermet articles and method of making
10/21/1998EP0706437B1 Method for supplying cooling medium to a grinding cup and grinding cup to carry out the method
10/21/1998CN1196451A Bearing seal structure
10/20/1998US5823277 For drilling a rock formation
10/20/1998US5823276 Diamond-tipped core barrel and method of using same
10/20/1998US5823275 High-speed drill for rock stake engineering
10/15/1998WO1998045092A1 Abrasive tools with patterned grit distribution and method of manufacture
10/15/1998WO1998023402A3 Production process for casting steel-bodied bits
10/14/1998EP0870151A1 Method and apparatus for removal of utility line and replacement with polyolefin pipe
10/14/1998EP0870092A1 Method and apparatus for forming piles in-situ
10/13/1998US5820985 PDC cutters with improved toughness
10/13/1998US5820318 Drilling tool
10/13/1998US5819862 Downhole components for use in subsurface drilling
10/13/1998US5819861 Earth-boring bit with improved cutting structure
10/13/1998US5819860 Rotary drill bits
10/08/1998WO1998043550A1 Titanium molybdenum hafnium alloys for medical implants and devices
10/07/1998EP0869256A2 Rotary drill bit with gage definition region, method of manufacturing such a drill bit and method of drilling a subterranean formation
10/07/1998CN1195387A Hardfacing with coated diamond particles
10/06/1998US5816347 PDC clad drill bit insert
10/06/1998US5816346 For drilling subsurface formations
10/04/1998CA2232662A1 Rolling cone steel tooth bit with enhancements in cutter shape and placement
10/04/1998CA2232469A1 Steel tooth cutter element with gage facing knee
10/01/1998WO1998032951A3 Method and device for driving bore-holes, especially in the sea bed, using a guide tip
09/1998
09/30/1998CN2292894Y Split double-core PDC drilling bit
09/30/1998CN2292893Y Serial medium and long nozzles for roller-bit
09/29/1998US5813485 For use in a rolling cone drill bit
09/29/1998US5813481 System for in situ replacement of cutting means for a ground drill
09/29/1998US5813480 Method and apparatus for monitoring and recording of operating conditions of a downhole drill bit during drilling operations
09/29/1998CA2143350C Conical inserts for rolling cone rock bits
09/29/1998CA2040052C Rock drill
09/23/1998EP0865864A1 Drill blank
09/23/1998EP0865561A1 Reaming apparatus with enhanced stability and transition from pilot hole to enlarged bore diameter
09/23/1998EP0678149B1 Method for reinforcing a masonry wall
09/23/1998CN2292159Y Extruded drill end casing
09/23/1998CN1194024A Rotary cone drill bit with truncated rolling cone cutters and dome area cutter inserts
09/22/1998US5810103 Method and apparatus for mounting PCD compacts
09/22/1998US5810079 For removing metal from a wellbore
09/22/1998US5809848 Method of making a carbide cutting insert
09/17/1998WO1998013317A3 Method and apparatus for infiltrating or sintering preformed components and components assemblies
09/16/1998EP0864723A1 Boring bit and boring casing
09/16/1998CN2291495Y Tri-cone bit with two low nozzle base
09/15/1998US5806934 Method of using composite cermet articles
09/15/1998US5806600 Whipstock system
09/15/1998US5806595 Wellbore milling system and method
09/15/1998CA2115682C Spiral flights for improved soil mixing and efficient boring for use on multi-shaft auger soil mixing apparatus
09/09/1998EP0862680A1 A sleeve for orientating a tool
09/09/1998EP0862678A1 Drill bit
09/09/1998EP0697057A4 Drill bit and other downhole tools
09/08/1998US5803196 Stabilizing drill bit
09/08/1998US5803195 System, method and cutterhead for dry full-area drilling
09/08/1998US5803192 Drill bit retainer for a down hole hammer assembly
09/08/1998US5803187 For drilling a hole in the earth
09/08/1998US5803176 Sidetracking operations
09/02/1998EP0861705A2 Grinding cup
09/02/1998CN1191899A Laser surface treating technology for rotary drill bit leg journel
09/01/1998US5799741 Method of cutting and a cutting rotative bit
09/01/1998US5799740 Directional boring head with blade assembly
08/1998
08/27/1998WO1998022689A3 Whipstock
08/26/1998CN2289048Y Rotable high pressure spray drilling fluid single conduit double-nozzle drill bit
08/25/1998CA2068005C Drilling apparatus
08/20/1998WO1998036149A1 Novel drilling device and method of use
08/19/1998CN2288261Y Dual-purpose drilling broaching bit controlled by centrifugal wings
08/18/1998US5794728 Percussion rock drill bit
08/18/1998US5794727 Earth remediation auger
08/18/1998US5794726 Rotary rock bit with infiltrated bearings
08/18/1998US5794725 For use in the drilling of a subterranean formation
08/18/1998US5794719 Ground boring apparatus
08/18/1998CA2159131C Steel tooth bit with a bi-metallic gage hardfacing
08/18/1998CA2016238C Milling apparatus with replaceable blades
08/13/1998WO1998035126A1 A method of mounting a cutting member in a tool body
08/12/1998EP0857853A2 Drill bit for horizontal directional drilling of rock formations
08/12/1998EP0857852A2 Method for horizontal directional drilling of rock formations
08/12/1998EP0857537A1 Insert for an abrasive tool
08/12/1998EP0626041B1 Masonry anchors
08/12/1998CN1190150A Drill bit for horizontal directional drilling of rock formations
08/12/1998CN1190149A Method for horizontal directional drilling of rock formations
08/11/1998US5792403 Method of molding green bodies
08/11/1998US5791424 Drill bit for the rotary-percussive drilling of preferably rock, concrete or the like
08/11/1998US5791423 Earth-boring bit having an improved hard-faced tooth structure
08/11/1998US5791422 Rock bit with hardfacing material incorporating spherical cast carbide particles
08/11/1998US5791421 Optimal material pair for metal face seal in earth-boring bits
08/11/1998US5791419 Drilling apparatus for replacing underground pipes
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