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)
10/2003
10/29/2003CN2583487Y Liquid controlled lubricating grease filling pump
10/29/2003CN1452685A Drill bit
10/29/2003CN1125915C High pressure water jet controllable spin drill bit unit
10/28/2003US6638152 Diamond blade having segment type cutting tip for use in cutting, grinding or drilling apparatus
10/28/2003US6637528 Bit apparatus
10/28/2003US6637527 Cutting structure for roller cone drill bits
10/28/2003US6637521 Earth borer
10/23/2003WO2003087537A1 Disk roller cutter and disk roller cutter monitoring system
10/23/2003WO2003086042A2 Method of cleaning hole diggers and spot cultivators and hole digger cleaning device
10/23/2003US20030196836 Rockbit with attachable device for improved cone cleaning
10/23/2003US20030196835 Wear compensated roller cone drill bits
10/23/2003US20030196834 Auger tool for boring
10/22/2003EP1354121A1 Method and device for boring holes in the floor or in rock
10/22/2003EP1354118A2 Backreamer
10/22/2003EP1212511B1 Method of mounting a tsp
10/22/2003CN2581681Y Wear-proof steel tooth roller bit
10/22/2003CN1450949A Drill bit
10/21/2003US6634444 Drill bit for trenchless drilling
10/16/2003WO2003085231A1 Percussion drill bit and a button therefor
10/16/2003US20030195733 Method for simulating drilling of roller cone bits and its application to roller cone bit design and performance
10/16/2003US20030192721 Cutting structure for roller cone drill bits
10/16/2003US20030192719 Drilling apparatus
10/16/2003DE10205643C1 Bohrkrone mit lösbaren Schneidzähnen Drill bit with indexable cutting teeth
10/15/2003CN2580088Y Layered cast diomand bit
10/09/2003WO2003083148A1 Polycrystalline material element with improved wear resistance and methods of manufacture thereof
10/09/2003WO2002090707A3 Drilling device comprising a drive body with nozzles
10/09/2003US20030188896 Cutter element with non-linear, expanded crest
10/09/2003CA2445301A1 Polycrystalline material element with improved wear resistance and methods of manufacture thereof
10/08/2003EP1285145A4 Apparatus for directional drilling
10/08/2003EP1095203B1 Abrasive body
10/07/2003US6629476 Bi-center bit adapted to drill casing shoe
10/02/2003WO2003080985A2 Stacked drill bit and toroidal reamer and method
10/02/2003US20030183426 Polycrystalline Material Element with Improved Wear Resistance And Methods of Manufacture Thereof
10/02/2003US20030183425 Hardfacing for milled tooth drill bits
10/02/2003US20030183424 Expandable bit
10/01/2003CN2577034Y Built-in self-circulating-lubricating sliding bearing
09/2003
09/30/2003US6626251 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
09/25/2003WO2003078790A1 Lining and drilling a wellbore with an expandable bit
09/25/2003WO2003078787A1 Grease filling arrangement in a cutter for a boring head
09/25/2003US20030178232 Multi profile performance enhancing concentric drill bit
09/24/2003CN1443903A Reducing stirring pile pile-forming process
09/18/2003US20030173116 Core bit having features for controlling flow split
09/18/2003US20030173114 Enhanced offset stabilization for eccentric reamers
09/17/2003CN2573653Y Toothed bit with negative offset teeth
09/17/2003CN2573652Y Hybrid tooth row toothed bit
09/17/2003CN2573651Y Hybrid cone bit
09/17/2003CN1443267A Cutting tool and method of using same
09/16/2003US6619413 Flightless rock auger for use with pressure drills with quick attachment and method of use
09/16/2003US6619412 Protected lubricant reservoir for sealed earth boring drill bit
09/16/2003US6619411 Design of wear compensated roller cone drill bits
09/16/2003CA2289367C Drilling tool with expandable elements
09/11/2003DE20310467U1 Drill head fabricated from metal plate welded to main supporting strut for horizontal drilling through soil or rock
09/10/2003CN2571987Y Slide bearing tri-cone rotary drill bit
09/10/2003CN1441146A Integral pile hole drilling and expanding apparatus
09/10/2003CN1440855A Method for producing tools especially arilling bit or milling cutter
09/09/2003US6615936 Method for applying hardfacing to a substrate and its application to construction of milled tooth drill bits
09/09/2003US6615935 Roller cone bits with wear and fracture resistant surface
09/09/2003US6615934 PDC drill bit having cutting structure adapted to improve high speed drilling performance
09/09/2003US6615933 Downhole tool with extendable members
09/09/2003CA2125882C Down-the-hole rock drill
09/04/2003US20030164253 Fluid drilling system
09/04/2003US20030164251 Expandable apparatus for drift and reaming borehole
09/04/2003US20030164250 Drillable drill bit nozzle
09/03/2003EP1340604A2 Drill
09/03/2003EP1340573A1 Manufacturing method for a drill bit or for a milling tool
09/03/2003EP1339939A1 A drilling tool used in horizontal drilling applications
09/03/2003EP1230465B1 Multiple cutter rotary hammer bit
09/03/2003EP0800609B1 A drilling method and bit assembly to realize the method
09/03/2003CN2570437Y Artificial polycrystal diamond composite drilling bit
09/03/2003CN2570436Y Casing of bit head
09/03/2003CN1120285C Apparatus and device for drilling and logging holes in same formation
09/02/2003US6612384 Cutting structure for roller cone drill bits
09/02/2003US6612383 Method and apparatus for milling well casing and drilling formation
08/2003
08/28/2003WO2003071087A1 Pantograph underreamer
08/28/2003US20030159855 Drilling tool
08/28/2003US20030159544 Method for the production of a tool, in particular a drill or milling cutter
08/28/2003US20030159543 Enhanced gage protection for milled tooth rock bits
08/28/2003DE20306797U1 Tubular drill for core drilling machine, has fluid supply with outlet located within working circumference of cutting parts
08/27/2003EP1338754A2 Method for forming a window in a tubular and apparatus for use in said method
08/27/2003EP1337734A1 Drill bit
08/27/2003EP1155217B1 A method for setting a packer in a well bore, and a packer
08/27/2003EP1068425B1 Drillstring with stabilisers for re-entering a primary wellbore
08/27/2003CN2568796Y Concurrent high cooling straight drill bit
08/27/2003CN1438431A Bearing slip-in material and making method
08/27/2003CN1119497C Claw-tooth rotary bit used to bore through earth formations and method for manufacturing the same
08/26/2003US6609580 Polycrystalline diamond compact insert reaming tool
08/21/2003WO2003069111A1 Drilling tool
08/21/2003WO2003068438A1 Fixing arrangement
08/21/2003US20030155155 Expandable underreamer/stabilizer
08/20/2003EP1336720A2 Method for forming a window in a tubular and apparatus for use in said method
08/20/2003CN1436914A Sealer for rotary drilling bit bearing
08/20/2003CN1118359C Drill bit with debris removing slot
08/19/2003US6607835 Noncraking cermets comprising polycrystalline diamond, metal nitrides, carbides, borides and/or nitrides, form by compaction, sintering and shaping to from drills or cutters having toughness and wear resistance
08/19/2003US6607047 Earth-boring bit with wear-resistant shirttail
08/19/2003US6607046 Expandable drill bit
08/19/2003US6606923 Design method for drillout bi-center bits
08/14/2003US20030152428 Method and apparatus for on-grade boring
08/14/2003US20030150651 Steerable horizontal subterranean drill bit having offset cutting tooth paths
08/14/2003US20030150650 Steerable horizontal subterranean drill bit having an offset drilling fluid seal
08/14/2003US20030150649 Steerable horizontal subterranean drill bit having a one bolt attachment system
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