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)
08/2003
08/14/2003US20030150442 Cutting tool and method of using same
08/13/2003EP1334259A1 Load responsive hydrodynamic bearing
08/13/2003EP1334258A1 Percussive down-the-hole hammer for rock drilling, and a drill bit used therein
08/13/2003CN2565960Y Three-axis screw drilling reamer
08/13/2003CN1435541A Concrete pile, and spiral drilling machine and method for forming said pile
08/13/2003CN1435300A Sliding extension closed percussion bit
08/13/2003CN1117913C Rotary impacting device for directional drilling in rock
08/12/2003US6604588 Gage trimmers and bit incorporating the same
08/12/2003US6604587 Flat profile cutting structure for roller cone drill bits
08/07/2003WO2003064806A1 Composite abrasive compact
08/07/2003US20030146023 Drilling apparatus
08/06/2003EP1332269A1 Device for producing a peripheral hole
08/06/2003EP1051561B1 Rotary cone drill bit with enhanced thrust bearing flange
08/06/2003CN1434190A Reaming method for pile hole of building and reaming bit for screw drilling machine
08/06/2003CN1433862A Method for preparing composition gradient intermediate transition layer on wedge shape or complex shape drill working-surface
08/05/2003US6601662 Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength
08/05/2003US6601661 Secondary cutting structure
08/05/2003US6601660 Cutting structure for roller cone drill bits
08/05/2003US6601659 Twist drill
07/2003
07/31/2003US20030141114 Drill bit for trenchless drilling
07/31/2003US20030141109 Self-penetrating drilling method and thrust-generating tool for implementing same
07/31/2003DE10001841C2 Baugruppe bestehend aus Halter und Schneidwerkzeug Assembly consisting of holder and cutting tool
07/30/2003EP1175546B1 Abrasive jet drilling assembly
07/30/2003EP1034354B1 Mill for use in a wellbore and method of milling
07/30/2003CN1433347A Perforating drill
07/29/2003US6598690 Dual dynamic rotary seal
07/29/2003US6598689 Roller cone for drill bit having improved resistance to fatigue cracking
07/29/2003CA2254096C Cutting tooth for earthworking
07/29/2003CA2078269C Divergent bean for drilling tools; tool using said bean
07/24/2003US20030138305 Drill bit
07/24/2003US20030138304 Rock drill
07/24/2003US20030136588 Roller cone drill bit having designed walk characteristics
07/24/2003CA2417307A1 Roller cone drill bit having designed walk characteristics
07/23/2003CN1431075A Method of processing blades
07/22/2003US6595305 Drill bit, hard member, and bit body
07/22/2003US6595304 Roller bit parallel inlayed compacts
07/22/2003US6595302 Multi-blade underreamer
07/22/2003US6595301 Single-blade underreamer
07/17/2003WO2003058024A1 Earth boring bit having air tube with removable cap
07/15/2003US6592985 Polycrystalline diamond partially depleted of catalyzing material
07/15/2003US6592304 Method for tipping a cutter head of an end-milling cutter
07/15/2003US6591922 Pantograph underreamer and method for forming a well bore cavity
07/10/2003WO2003025330A3 Liquid seal for wet roof bit
07/10/2003DE20214442U1 Tool production method for making e.g. drill, milling cutter involves use of blank bar has diameter which is larger than diameter of conveying helix introduced in single operation
07/09/2003EP1324960A1 Polycrystalline diamond with a surface depleted of catalyzing material
07/09/2003CN1428496A Drilling rod capable of placing exploration explosive into downhole, connector and series disposable drill bits
07/08/2003US6589640 Polycrystalline diamond partially depleted of catalyzing material
07/08/2003US6588520 Rock drill
07/08/2003US6588519 Head for a rock drill
07/08/2003US6588516 Method and apparatus for directional boring under mixed conditions
07/08/2003US6588515 Drill bit for directional drilling
07/03/2003WO2003054341A1 A boring head and a roller cutter and a saddle for a boring head for rotary drilling
07/02/2003EP1322832A1 Cutting insert for percussion drill bit
07/02/2003CN2558755Y Optimized profile designed diamond bit
07/02/2003CN2558754Y Pressure balancing and oil storage compensating device for cone bit
07/02/2003CN2558753Y Cone bit with bearing combined seal structure
07/02/2003CN2558752Y Tricone bit
07/02/2003CN2558751Y Offset single cone bit
07/01/2003US6585064 Polycrystalline diamond partially depleted of catalyzing material
07/01/2003US6585063 Multi-stage diffuser nozzle
07/01/2003US6585062 Steerable directional drilling reamer
06/2003
06/26/2003US20030118414 Rock drill
06/26/2003US20030116361 Superabrasive cutters and drill bits so equipped
06/26/2003US20030116358 Drill bit stabilizer device
06/26/2003US20030116357 Earth boring bit having air tube with removable cap
06/25/2003EP1117896A4 Hole opener with multisized, replaceable arms and cutters
06/24/2003US6581702 Three-cone rock bit with multi-ported non-plugging center jet nozzle and method
06/24/2003US6581671 System for infiltrating preformed components and component assemblies
06/19/2003WO2003049889A2 Consolidated hard materials, methods of manufacture, and applications
06/19/2003US20030113560 Woven and packed composite constructions
06/19/2003US20030111273 Impregnated rotary drag bit
06/19/2003US20030111272 Fracture and wear resistant rock bits
06/19/2003US20030111267 Drill bits
06/18/2003EP1319797A1 Cutter ring of a roller disc in part and whole section boring machines
06/18/2003EP1318969A1 High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
06/18/2003EP0891467B1 Polycrystalline diamond cutter with enhanced durability and increased wear life
06/17/2003US6578647 Sealing structure for a rock drill bit
06/17/2003US6578635 Lining removal method, system and components thereof
06/12/2003WO2003048510A1 Reverse section milling method and apparatus
06/12/2003US20030106721 Roller cone drill bit having non-axisymmetric cutting elements oriented to optimize drilling performance
06/12/2003US20030106720 Boring head, roller cutter and saddle for a boring head for rotary drilling
06/12/2003US20030106719 Centraliser
06/11/2003EP1318268A1 Protective Overlay Coating for PDC Drill Bits
06/11/2003CN2555374Y PDC bit
06/11/2003CN2555373Y PDC bit for oriented well
06/10/2003US6575350 Method of applying a wear-resistant layer to a surface of a downhole component
06/10/2003US6575256 Drill bit with lateral movement mitigation and method of subterranean drilling
06/10/2003US6575255 Pantograph underreamer
06/05/2003US20030102167 Bit retention system
06/05/2003DE10158603C1 Mini-Diskmeissel Mini-Diskmeissel
06/04/2003EP1316669A2 Rock drilling tool
06/04/2003EP1027521B1 Earth-boring bit having cutter with replaceable kerf ring with contoured inserts
06/04/2003EP0678150B1 Improved rotary roller reamer
06/04/2003EP0676000B1 Drill bit having polycrystalline diamond compact cutter with spherical first end opposite cutting end
06/03/2003US6572447 Method of forming a base body for a diamond bit
06/03/2003US6571891 Web cutter
06/03/2003US6571890 Twist drill
06/03/2003US6571889 Cutters or drills comprising cermets selected from refractories, carbides, nitrides, borides, carbonitrides, alloys and/or mixtures having wear resistant surfaces
06/03/2003US6571887 Directional flow nozzle retention body
06/03/2003US6571886 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
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