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)
10/1985
10/29/1985US4549615 Single-pass notching and drilling tool and method of drilling a blast role therewith
10/29/1985US4549614 Drilling device
10/29/1985US4549613 Downhole tool with replaceable tool sleeve sections
10/22/1985US4548284 Roller ball retention of reamer cutter assembly
10/22/1985US4548282 Method for sinking boreholes
10/22/1985US4548280 Drill bit having a failure indicator
10/15/1985US4546837 Drill bit having angled nozzles for improved bit and well bore cleaning
10/15/1985CA1195319A1 Composite floating element thrust bearing
10/15/1985CA1195318A1 Rock bit cone retention means
10/09/1985EP0157625A2 Composite tool
10/09/1985EP0157278A2 Multi-component cutting element using polycrystalline diamond disks
10/09/1985EP0157093A2 Teeth for excavators
10/08/1985US4545443 Means for drilling
10/08/1985US4545441 Drill bits with polycrystalline diamond cutting elements mounted on serrated supports pressed in drill head
10/08/1985CA1194893A1 Cemented carbide compositions
10/08/1985CA1194857A1 Rotary drilling bits
10/02/1985EP0156762A1 Trepaning cutter
10/02/1985EP0156264A2 Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks
10/02/1985EP0156235A2 Multi-component cutting element using consolidated rod-like polycrystalline diamond
10/01/1985CA1194468A1 Opposed button thrust surfaces for earth boring bit
09/1985
09/25/1985EP0155540A1 Apparatus working like an excavator for pushing pipes under the soil
09/25/1985EP0155267A1 Method of and means for reconditioning percussion drills
09/24/1985US4543019 Boring tool
09/24/1985US4542943 Earthworking tool for protecting from abnormally high cutting loads
09/24/1985US4542798 Nozzle assembly for an earth boring drill bit
09/24/1985US4542797 Roller reamer
09/24/1985CA1193870A1 Abrasive product
09/18/1985EP0155026A2 Rotary drill bit with cutting elements having a thin abrasive front layer
09/18/1985EP0154936A2 An exposed polycrystalline diamond mounted in a matrix body drill bit
09/17/1985US4541758 Means and method for lubricating core drills
09/17/1985US4541494 Drill bit assembly
09/11/1985EP0154422A2 Improvements in rotary drill bits
09/10/1985US4540596 Method of producing thin, hard coating
09/10/1985US4540056 Cutter assembly
09/10/1985US4540055 Drill bit assembly having improved operational life
09/03/1985US4539018 Method of manufacturing cutter elements for drill bits
09/03/1985US4538928 Screw ring cone retention apparatus and method for rock bits
09/03/1985US4538763 Nozzle conveniently assembled and disassembled
09/03/1985US4538691 For cutting in earth formations
09/03/1985US4538690 Cutting member for mounting on a drill bit
09/03/1985CA1192900A1 Detachable shoe plates for large diameter drill bits
08/1985
08/27/1985US4537409 Radial rock bit seal
08/20/1985US4535853 Drill bit for jet assisted rotary drilling
08/15/1985WO1985003545A1 Method for inner cleaning of a core bit with reversed fluid flushing and a core bit herefor
08/14/1985EP0151548A1 Drill bit for combined rotary and high pressure jet drilling
08/14/1985EP0151537A2 Improved drill bit and cutter therefor
08/13/1985US4534773 Abrasive product and method for manufacturing
08/13/1985US4534676 Excavating and propelling machine for laying pipelines underground
08/13/1985US4534427 Abrasive containing fluid jet drilling apparatus and process
08/07/1985EP0151031A2 Improved drill bit manufacturing method
08/06/1985US4533005 Adjustable nozzle
08/06/1985US4533004 Self sharpening drag bit for sub-surface formation drilling
08/06/1985US4533003 Drilling apparatus and cutter therefor
08/06/1985CA1191507A1 Rock bit construction
07/1985
07/30/1985US4531596 Tool for boring an enlarged portion within the interior of a hole and a tiltable tool for completing that tool
07/30/1985US4531595 Wear resistant composite insert and boring tool with insert
07/30/1985US4531592 Earth drill bit apparatus
07/24/1985EP0149530A2 Self sharpening drag bit assembly
07/23/1985US4530410 Hole boring apparatus and method
07/16/1985US4529048 Inserts having two components anchored together at a non-perpendicular angle of attachment for use in rotary type drag bits
07/16/1985US4529047 Cutting tooth and a rotating bit having a fully exposed polycrystalline diamond element
07/16/1985US4529046 Device for producing boreholes in coal or the like
07/09/1985US4527998 Brazed composite compact implements
07/09/1985US4527931 Indexable insert for mining drill
07/09/1985US4527728 Tool for scarifying concrete
07/09/1985US4527644 Drilling bit
07/09/1985US4527643 Rotary cutting member for drilling holes
07/09/1985US4527642 Earth-boring drill bit with rectangular nozzles
07/09/1985US4527641 Percussion tool
07/09/1985US4527638 Mine tool roof bit insert and a method of drilling therewith
07/02/1985US4526242 Drilling device
06/1985
06/26/1985EP0146252A2 Leak-proof, high pressure, high velocity, fluid jet cutting nozzle assembly
06/25/1985US4525179 High temperature-high pressure, partitions in crystal mass
06/25/1985US4525178 With precemented carbide; wear resistance; impact strength
06/19/1985EP0145423A2 Rotary drill bits and cutting elements for such bits
06/19/1985EP0145422A2 Improvements in rotary drill bits
06/19/1985EP0145421A2 Improvements in or relating to the manufacture of rotary drill bits
06/18/1985US4523652 Drainhole drilling assembly and method
06/18/1985CA1189061A1 Plural-part earth bit, and an improved bit head therefor
06/18/1985CA1189060A1 Drilling device
06/12/1985EP0144222A2 Improvements in or relating to rotary drill bits
06/11/1985CA1188678A1 Boring devices
06/06/1985WO1985002442A1 Mining drill bit
06/05/1985EP0049246B1 Rotary drill bit
06/04/1985US4520882 Drill head
06/04/1985US4520881 Tool component
05/1985
05/29/1985EP0142941A1 Rock bit cutter cones having metallurgically bonded cutter inserts
05/28/1985US4519719 Earth boring bit with pressure compensating bearing seal
05/28/1985US4519614 Generally cylindrical rotary drill face seal having improved resistance to radial distortion
05/23/1985WO1985002223A1 Hybrid rock bit
05/15/1985EP0141195A1 Tool
05/14/1985US4516642 Drill bit having angled nozzles for improved bit and well bore cleaning
05/14/1985US4516641 Earth boring bit with pressure compensating rigid face seal
05/14/1985US4516640 Rotary drill bit
05/08/1985EP0140849A2 Rock drill bit
05/08/1985EP0140676A2 Improvements in or relating to rotary drill bits
05/08/1985EP0140253A1 Tool body for a rotary drilling tool
05/07/1985US4515230 Roof drill bit
05/07/1985US4515229 Drill bit assembly with fluid separator
05/07/1985US4515228 Earth boring bit
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