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)
11/1995
11/30/1995WO1995026454A3 Curved drilling apparatus
11/29/1995CN2213834Y Spiral screw shape short wing compound piece bit
11/28/1995US5469927 Cutting elements for rotary drill bits
11/28/1995US5469926 Directional boring drill bit blade
11/28/1995CA2043410C Seafloor drilling apparatus
11/23/1995DE4417145A1 Hard metal inserts for drilling heads
11/22/1995EP0682738A1 Drilling apparatus.
11/22/1995CN1030341C Diamond drilling tool for complex stratum
11/21/1995US5467837 Rotary drill bit having an insert with leading and trailing relief portions
11/21/1995US5467836 Fixed cutter bit with shear cutting gage
11/21/1995US5467669 Cutting tool insert
11/20/1995CA2123968A1 Cutting tool insert
11/16/1995WO1995030819A1 Rotatable cutting bit assembly
11/15/1995CN1030264C Low friction subterranean drill bit and related methods
11/14/1995US5465800 Rolling cutter drill bits
11/09/1995WO1995030066A1 Rotary borer
11/09/1995DE4418125C1 Method of decontaminating ground
11/08/1995CN2212066Y Central nozzle of geology prospecting gear wheel drill bit
11/07/1995US5464068 Drill bits
10/1995
10/31/1995US5462130 Drilling tool
10/31/1995US5462128 Cutter bit for use in drilling operations
10/26/1995WO1995028545A1 Drill bit for geological exploration
10/25/1995EP0678654A2 Replaceable cutting means segment for use in a ground drill
10/25/1995EP0678653A2 Tool for use in system for in situ replacement of cutting means for a ground drill
10/25/1995EP0678652A2 Insert for use in retaining a cutting means in a ground drill
10/25/1995EP0678651A2 Drive sub for connection to a ground drill
10/25/1995EP0678150A1 Improved rotary roller reamer
10/25/1995EP0678149A1 Masonry coring system
10/25/1995CN2210949Y Cold-compressed spheircal-teeth jump-bit for drill wagon
10/24/1995US5460432 Cutter head for a tunnel excavator
10/24/1995US5460233 Diamond cutting structure for drilling hard subterranean formations
10/24/1995US5460232 Rotary earth drill bit socket shield
10/24/1995US5460231 Device and method for augering a conical hole in solid media
10/24/1995US5460230 Core bit
10/18/1995EP0677136A1 A means of mounting a revolving cutting element.
10/18/1995CN1030093C Cold headed center vacuum drill bit
10/17/1995US5458211 For drilling holes in hard rock with diameters up to three inches
10/17/1995US5458210 Drill bits and blades therefor
10/12/1995WO1995027121A1 Rotary drill bit with improved cutter
10/12/1995WO1995027120A1 Rotary drill bit with improved cutter and seal protection
10/11/1995EP0676001A1 Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface
10/11/1995EP0676000A1 Drill bit having polycrystalline diamond compact cutter with spherical first end opposite cutting end
10/10/1995US5456552 Method and apparatus for installing pipe in horizontal borehole
10/10/1995US5456406 Fastening devices
10/10/1995US5456329 Bifurcated drill bit construction
10/10/1995US5456328 Drill bit with improved rolling cutter tooth pattern
10/10/1995US5456327 O-ring seal for rock bit bearings
10/10/1995US5456325 Method and apparatus for driving a probe into the earth
10/10/1995US5456312 For removing material from a well bore
10/10/1995US5456141 Method and system of trajectory prediction and control using PDC bits
10/10/1995CA2013786C Flushing means for drilling tools
10/05/1995WO1995026454A2 Curved drilling apparatus
10/03/1995US5454437 Roller cone core bit
09/1995
09/28/1995WO1995025875A1 Milling tool
09/27/1995CN2208615Y High-efficiency composite scraping drill
09/27/1995CN1109136A Boring drill
09/26/1995US5453241 Milling, pressing, sintering; heat treatment, carburization, quenching
09/26/1995US5452771 For forming a borehold
09/26/1995US5452770 Rock bit and improved forging method for manufacturing thereof
09/26/1995US5452759 Whipstock system
09/26/1995US5452628 Cold headed center vacuum drill bit
09/21/1995WO1995021317A3 Drilling bit assembly and apparatus
09/19/1995US5450912 Maintenance and extraction of poles
09/13/1995EP0670950A1 Drilling apparatus.
09/12/1995US5449254 Compost aeration tool
09/12/1995US5449048 Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface
09/06/1995CN1107928A Rotating drill
09/05/1995US5447208 Superhard cutting element having reduced surface roughness and method of modifying
08/1995
08/30/1995EP0669449A2 Nozzle structure for rotary drill bits
08/30/1995EP0669448A1 Hard metal plate and rock drill bit provided with such a plate
08/30/1995EP0328583B1 Improved coated pcd elements and products and methods
08/30/1995CN1107409A 麻花钻 Twist drill
08/29/1995US5445231 Earth-burning bit having an improved hard-faced tooth structure
08/29/1995US5445222 Whipstock and staged sidetrack mill
08/29/1995CA1336831C Drill bit
08/24/1995WO1995022711A1 Trenchless pipeline installation method with pilot hole corrective alignment
08/24/1995WO1995022677A1 An apparatus for drilling open a tunnel and drilling method
08/24/1995CA2183870A1 An apparatus for drilling open a tunnel and drilling method
08/23/1995CN1107201A 岩石钻 Rock drill
08/22/1995US5443565 Drill bit with forward sweep cutting elements
08/22/1995US5443337 Sintered diamond drill bits and method of making
08/15/1995US5441121 Earth boring drill bit with shell supporting an external drilling surface
08/15/1995US5441120 Roller cone rock bit having a sealing system with double elastomer seals
08/10/1995WO1995021317A2 Drilling bit assembly and apparatus
08/09/1995EP0517731B1 Apparatus and method for building a foundation for uprights or for making passages therethrough
08/08/1995US5439068 Modular rotary drill bit
08/08/1995US5439067 Rock bit with enhanced fluid return area
08/05/1995CA2115004A1 Pilot bit for use in auger bit assembly
08/03/1995DE4403040A1 Widening drill bit for widening pilot hole in loose stone
08/01/1995US5437343 Diamond cutters having modified cutting edge geometry and drill bit mounting arrangement therefor
07/1995
07/27/1995DE4401914A1 Hammer drill with grinding disc and front spiral
07/26/1995EP0664373A2 A tool and method of boring and filling the borehole with concrete without removing soil therefrom
07/26/1995CN1105625A 钻孔工具 Drilling Tools
07/25/1995US5435403 Cutting elements with enhanced stiffness and arrangements thereof on earth boring drill bits
07/25/1995US5435402 Self-propelled earth drilling hammer-bit assembly
07/25/1995US5435401 Down-the-hole rock drill
07/25/1995US5435176 Hazardous waste characterizer and remediation method and system
07/25/1995CA1336387C Rod for applying hard surfacing to a surface and method of making same
07/18/1995US5433281 Roof drill bit tip
07/18/1995US5433280 Fabrication method for rotary bits and bit components and bits and components produced thereby
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