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)
12/1986
12/30/1986CA1216010A1 Clamping assembly
12/30/1986CA1215966A1 Earth boring bit with pressure compensating metal face seal
12/23/1986US4630694 For enlarging the size of oil/gas holes
12/23/1986US4630693 Rotary cutter assembly
12/23/1986US4630692 Applying to body a mixture of wear resistant metallic powder and binder, voltalizing binder, and pressurizing
12/16/1986US4629373 Polycrystalline diamond body with enhanced surface irregularities
12/16/1986US4629338 Seal and bearing apparatus for bits
12/16/1986US4629010 Process and device for sinking wells
12/09/1986US4627882 Roller cutter is surface hardened and lubricated, wear resistant deposit on bearing pin
12/09/1986US4627503 Multiple layer polycrystalline diamond compact
12/02/1986US4625816 Boring drill bit
12/02/1986CA1214771A1 Cutter configuration for a gage-to-shoulder transition and face pattern
12/02/1986CA1214770A1 Cutting tooth and a rotating bit having a fully exposed polycrystalline diamond element
11/1986
11/26/1986CN85205107U Bearing drill for perfusion pile
11/25/1986US4624830 Manufacture of rotary drill bits
11/25/1986US4624330 Rotary drill bit with strainer element
11/25/1986US4624329 Rotating cutter drill set
11/25/1986US4624327 Method for combined jet and mechanical drilling
11/25/1986EP0155267A4 Method of and means for reconditioning percussion drills.
11/20/1986EP0202190A1 Earth boring bit with improved rigid face seal assembly
11/18/1986US4623028 Seal assembly for drill bits
11/18/1986US4623027 Unsegmented rotary rock bit structure and hydraulic fitting
11/18/1986US4623025 Soil-displacement drill and method for manufacturing a pile
11/18/1986CA1214160A1 Roller cutter with a tilted journal
11/18/1986CA1214159A1 Drill bit and improved cutting element
11/18/1986CA1214158A1 Rock drill
11/12/1986EP0119239B1 Rotary drill bits
11/12/1986CA1213879A Drifting equipment
11/06/1986WO1986006435A1 A drill adapter
11/05/1986EP0200476A1 Improvements in or relating to rotary drill bits
11/04/1986US4620803 Friction bearing couple
11/04/1986US4620600 Drill arrangement
10/1986
10/29/1986EP0199040A1 Percussion bit for rock drills
10/28/1986US4619534 Roller cutter drill bit having a texturized seal member
10/28/1986US4619335 Enhanced circulation drill bit
10/22/1986EP0198627A1 Improvements in or relating to the manufacture of rotary drill bits
10/21/1986USRE32267 Process for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein
10/21/1986US4618269 Composite of alloy and base material melted forming new alloy bond
10/21/1986US4618010 Hole opener
10/21/1986US4618009 Reaming tool
10/15/1986EP0197741A2 Improvements in or relating to rotary drill bits and methods of manufacture thereof
10/14/1986US4616720 Divided-bucket type rotary excavator
10/08/1986EP0197019A1 Drill bit
10/08/1986EP0196777A1 Improvements in or relating to cutting elements for rotary drill bits
10/07/1986US4615400 Sonic drilling system employing spherical drill bit
10/07/1986CA1212376A1 Diamond cutting element in a rotating bit
10/01/1986CN86102239A Drill bit
09/1986
09/30/1986US4614242 Bore hole enlarging arrangement and method
09/30/1986CA1211964A1 Roller ball retention of vns reamer cutter assembly
09/25/1986WO1986005542A1 Percussion drill bit for stone drilling machines
09/24/1986EP0195265A1 Tool for undercutting bore holes
09/23/1986US4613005 Unitized seal for severe service applications
09/23/1986US4613004 Earth boring bit with labyrinth seal protector
09/23/1986US4613003 Apparatus for excavating bore holes in rock
09/16/1986US4611673 Drill bit having offset roller cutters and improved nozzles
09/16/1986US4611672 For fluid-jet supported rotary drilling in rock
09/09/1986US4610579 Core drill bit with dynamic cooling fluid flow control means
09/09/1986US4610452 Belleville seal for sealed bearing rotary cone rock bits
09/09/1986US4610320 Cushioning hard tungsten carbide particles with soft elastic metal powder, fusing with hard matrix; well drilling
09/09/1986US4610319 Hydrodynamic lubricant seal for drill bits
09/09/1986US4610318 Rotary cutter assembly
09/09/1986US4610317 Spherical bit
09/09/1986US4610313 Drill bit having a failure indicator
09/03/1986EP0193486A2 Earth boring bit with bearing sleeve
09/03/1986EP0193361A1 Rotary drill bits and methods of manufacturing such bits'
09/03/1986CN85101970A Jet-suck impactor
09/02/1986CA1210752A1 Sealed hard-rock drill bit
09/02/1986CA1210751A1 Drag bit
08/1986
08/27/1986EP0192016A1 Rotary drill bit
08/26/1986US4607712 Rock drill bit
08/26/1986US4607711 Rotary drill bit with cutting elements having a thin abrasive front layer
08/20/1986CN86100885A Improved kerfing drag bit
08/19/1986US4606418 Cutting means for drag drill bits
08/19/1986US4606108 Drill bit method and apparatus
08/12/1986US4605157 Method of mounting a cutter device
08/12/1986US4605079 Drill bit
08/12/1986US4604818 Under reaming pile bore excavating bucket and method of its excavation
08/12/1986CA1209570A1 Air groove scraper
08/05/1986US4604106 Composite polycrystalline diamond compact
08/05/1986US4603751 Mechanically fastened center vacuum roof drill bit
08/05/1986US4603750 Replaceable bit nozzle
07/1986
07/30/1986EP0189212A1 An improved kerfing drag bit
07/30/1986EP0189024A1 Drill bit
07/29/1986US4602691 Diamond drill bit with varied cutting elements
07/23/1986EP0188360A1 Improvements in or relating to cutting assemblies for rotary drill bits
07/23/1986EP0188343A2 Stabilising tool
07/23/1986EP0187971A2 Drill bit
07/15/1986US4600064 Earth boring bit with bearing sleeve
07/08/1986US4598779 Rock drill bit
07/08/1986US4598778 Rotary rock bit ball plug
07/02/1986EP0186408A2 Improvements in or relating to cutting elements for rotary drill bits
07/02/1986CN85102269A Ball geal serial small-diametered hard metal one-piece bot pick
07/01/1986US4597456 Conical cutters for drill bits, and processes to produce same
07/01/1986US4597455 Rock bit lubrication system
06/1986
06/24/1986US4596472 Thrust bearing and axial retainer system for rotary cone rock bits and method for assembling same
06/24/1986US4596296 Rotary drill bits
06/24/1986US4596295 Roller cutter with a tilted journal
06/24/1986CA1206470A1 Tooth configuration for an earth boring bit
06/17/1986US4595067 Rotary drill bit, parts therefor, and method of manufacturing thereof
06/17/1986CA1206144A1 Earth-boring drill bit with rectangular nozzles
1 ... 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 ... 195