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)
07/1989
07/12/1989CN1033857A Diameter-maintainer method for diamond-electroplating bits
07/11/1989US4846290 Underreamer with revolving diamond cutter elements
07/05/1989EP0323090A1 Rock bits
07/05/1989EP0322565A1 Rock drill bit
07/05/1989EP0322554A1 Rock drill bit
07/04/1989US4844186 Replaceable well drill bit
07/04/1989US4844185 Rotary drill bits
07/04/1989CA1256856A1 Earth boring bit for soft to hard formations
06/1989
06/28/1989EP0322347A1 Drag bit with nozzles for drilling plastic formations
06/28/1989EP0322214A1 Abrasive product
06/28/1989EP0321673A2 Drill
06/27/1989US4842207 Device for detecting and measuring the tension on a cable
06/27/1989US4842083 Drill bit stabilizer
06/27/1989US4842082 Variable outside diameter tool for use in pikewells
06/27/1989CA1256423A1 Rotary drill bits and methods of manufacture thereof
06/27/1989CA1256421A1 Drill shoe
06/20/1989CA1256096A1 Rock bit with wear resistant inserts
06/14/1989CN2039343U Assisting set without supporting jack
06/13/1989US4838366 Drill bit
06/13/1989US4838365 Seal assembly for rotary drill bits
06/13/1989CA1255652A1 Drill steel
06/07/1989EP0318472A1 Enhanced circulation drill bit
06/06/1989US4836307 Hard facing for milled tooth rock bits
06/06/1989US4836306 Down hole drill chuck lock
06/06/1989US4836301 Method and apparatus for directional drilling
06/06/1989US4836178 Inset for a tool
06/06/1989CA1255106A1 Abrasive products
06/01/1989DE3839154A1 Bohrmeissel A drill bit
06/01/1989DE3738942A1 Rotary bit for deep holes
05/1989
05/30/1989US4834194 Method and apparatus for detection of volatile soil contaminants in situ
05/30/1989CA1254880A1 Rotary drill bits
05/30/1989CA1254879A1 Rotary drill bits and methods of manufacturing such bits
05/30/1989CA1254772A1 Rotary drill bits
05/24/1989EP0317089A2 Precision roller bearing for rock bits
05/24/1989EP0317069A1 Drag bit and method for its manufacture
05/23/1989US4832143 Rotary drilling device
05/23/1989US4832139 Inclined chisel inserts for rock bits
05/23/1989US4832136 Drill bit and roller cutter for said drill bit
05/23/1989US4832135 Flow through raise boring bit
05/23/1989US4831859 Extrusion tool for producing a drill bit blank
05/23/1989CA1254552A1 Bearing system for a roller cone rock bit
05/23/1989CA1254451A1 Polycrystalline diamond and cbn cutting tools
05/18/1989WO1989004418A1 Self-propelled subsoil penetrating tool system
05/17/1989CN2037770U Combined superdepth-hole drill
05/16/1989US4830124 Rotary drill bit
05/16/1989US4830123 Mounting means for cutting elements in drag type rotary drill bit
05/16/1989US4830122 Flow pulsing apparatus with axially movable valve
05/16/1989CA1254195A1 Drill bit and roller cutter for said drill bit
05/16/1989CA1254063A1 Consolidation of a part from separate metallic components
05/10/1989EP0315547A1 Bucket excavator
05/10/1989EP0315330A2 Improvements in or relating to the manufacture of rotary drill bits
05/10/1989EP0315221A2 Rotary drill bits and methods of manufacturing such bits
05/10/1989EP0314953A2 Improvements in or relating to rotary drill bits
05/02/1989US4825964 Arrangement for reducing seal damage between rotatable and stationary members
05/02/1989US4825963 High-pressure waterjet/abrasive particle-jet coring method and apparatus
05/02/1989US4825747 Method and device for detecting a fluid flow rate
05/02/1989CA1253485A1 Earth boring bit with shear compression seal
05/02/1989CA1253484A1 Earth boring bit with labyrinth seal protector
05/02/1989CA1253483A1 Diamond drill bit with co-joined cutters
04/1989
04/26/1989EP0313413A1 Flexible drill string member and method of drilling deviated holes
04/26/1989CN2036569U Submersible pipe push bit
04/26/1989CN1032509A Low pressure bonding of pcd bodies and method
04/25/1989US4824123 Mechanical face seal for rock bits
04/25/1989US4823893 Metal insert mounting
04/25/1989US4823892 Rotary drill bits
04/25/1989CA1253138A1 Button insert for rock drill bits
04/20/1989WO1989003458A1 Improvement to the method of compaction-reinforcement-injection or decompaction-draining of grounds by means of auxiliary tubes
04/19/1989EP0312487A1 Earth boring drill bit with matrix displacing material
04/19/1989EP0312281A2 Abrasive products
04/18/1989US4822057 Mechanical face seal for rock bits
04/18/1989US4821819 Annular shim for construction bit having multiple perforations for stress relief
04/18/1989US4821465 Abrasive tool
04/12/1989EP0311422A1 A method of drilling a substrate
04/11/1989US4819748 Roof drill bit
04/11/1989US4819747 Triangular oil well drill bit for use in unconsolidated formations
04/11/1989US4819746 Reverse circulation down-the-hole hammer drill and bit therefor
04/11/1989US4819745 Flow pulsing apparatus for use in drill string
04/11/1989US4819744 Funnel hole ice auger
04/11/1989US4819517 Selected bearing couple for a rock bit journal and method for making same
04/11/1989US4819516 Method of forming a cutting element having a V-shaped diamond cutting face
04/11/1989CA1252459A1 Diamond crown bit
04/11/1989CA1252458A1 Cutting elements for rotary drill bits
04/06/1989WO1989002971A1 Soil auger
04/06/1989DE3740692A1 Rock drill
04/05/1989CN1032131A Masonry drill tip with strong and chamfered cutting edges
04/04/1989US4817852 Method of replacing drill bit heads
04/04/1989US4817743 Butterfly-type shim having semi-opened bottom and double sandwich braze joint produced therewith
04/04/1989US4817742 Butterfly-type shim having perforations in mid-section thereof and double sandwich braze joint produced therewith
04/04/1989US4817741 Rotary drill
04/04/1989US4817725 Oil field cable abrading system
03/1989
03/28/1989US4815543 Activated rock cutting assembly
03/28/1989US4815342 Method for modeling and building drill bits
03/23/1989DE3830972A1 Rotary drilling tool
03/22/1989EP0308083A2 Device for sampling soils and retaining volatiles therein and method of using same
03/21/1989US4813502 Drilling bit with improved trailing edge vent
03/21/1989US4813501 Rotary mining bit
03/21/1989US4813500 Expendable diamond drag bit
03/15/1989EP0221948B1 A drill adapter
03/14/1989US4811801 Roller cone, polycrystalline diamond
03/14/1989US4811800 Flexible drill string member especially for use in directional drilling
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