| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 03/23/2000 | WO2000015942A1 Reinforced abrasive-impregnated cutting elements, drill bits including same and methods |
| 03/22/2000 | CN1247920A Expandable nole drilling mechanism for deposited reinforced concrete pile |
| 03/21/2000 | US6039131 Directional drift and drill PDC drill bit |
| 03/21/2000 | US6039129 Locking system for a firing mechanism of a downhole tool |
| 03/21/2000 | US6039127 Rock drill |
| 03/16/2000 | WO2000013869A1 Diamond blade having segment type cutting tip for use in cutting, grinding or drilling apparatus |
| 03/16/2000 | WO2000013868A1 Diamond blade having rim type cutting tip for use in grinding or cutting apparatus |
| 03/16/2000 | WO2000001916A8 Abrasive body |
| 03/16/2000 | DE19838199C1 Bohrer zur Bodenprobenentnahme Drill for soil sampling |
| 03/15/2000 | EP0985081A1 Drilling tool |
| 03/15/2000 | EP0985080A1 Drilling tool, especially a rock drill |
| 03/15/2000 | EP0720683B1 A cutter for a boring head, a device for accommodating thermally expanding grease, and a method of greasing bearings in a cutter |
| 03/15/2000 | CN1050403C Automatic pressure unit |
| 03/14/2000 | US6035953 Down hole hammer assembly |
| 03/14/2000 | US6035939 Wellbore anchor system |
| 03/09/2000 | WO2000012860A2 Roller-cone bits, systems, drilling methods, and design methods with optimization of tooth orientation |
| 03/09/2000 | WO2000012859A2 Force-balanced roller-cone bits, systems, drilling methods, and design methods |
| 03/08/2000 | EP0983458A1 Encapsulated elastomeric relief valve |
| 03/08/2000 | CN2367760Y Drilling enlarging-borehole combined drill for formation of pedestal mud-jacked pile |
| 03/07/2000 | US6033295 Segmented cutting tools |
| 03/07/2000 | US6033152 Pile forming apparatus |
| 03/07/2000 | US6033117 Sealed bearing drill bit with dual-seal configuration |
| 03/07/2000 | US6032750 Drilling tool having a drill bit with primary and secondary cutting edges |
| 03/07/2000 | US6032749 Drilling tool |
| 03/02/2000 | WO2000011304A1 Reverse circulation drilling system with bit locked underreamer arms |
| 03/02/2000 | WO2000011303A1 Apparatus for directional drilling |
| 03/02/2000 | CA2338579A1 Reverse circulation drilling system with bit locked underreamer arms |
| 03/01/2000 | EP0982467A2 Drill for obtaining soil samples |
| 03/01/2000 | CN2366548Y Combination cutting drill bit with wear resisting parts |
| 03/01/2000 | CN2366547Y Combination type drill bit |
| 03/01/2000 | CN2366546Y Drill bit used for coal mining or rock drilling |
| 02/29/2000 | US6029760 Superhard cutting element utilizing tough reinforcement posts |
| 02/29/2000 | US6029759 Hardfacing on steel tooth cutter element |
| 02/29/2000 | US6029756 Nozzle positioning assembly |
| 02/29/2000 | US6029544 Sintered diamond drill bits and method of making |
| 02/24/2000 | WO2000008911A1 Motorized auger |
| 02/24/2000 | DE19802691C1 Salvage method for cables, leads or other comparable elongated units from ground |
| 02/23/2000 | EP0702746B1 System for in situ replacement of cutting means for a ground drill |
| 02/23/2000 | CN2365389Y Hard alloy tooth for cone bit |
| 02/23/2000 | CN2365388Y Drilling bit with complex cutting structure |
| 02/22/2000 | US6026919 Cutting element with stress reduction |
| 02/22/2000 | US6026918 Roof bolt bit |
| 02/22/2000 | US6026917 Earth-boring bit with improved bearing seal |
| 02/22/2000 | US6026916 Rotary drill arrangement |
| 02/16/2000 | EP0765202B1 Drilling tool with internal cavities for chip removal |
| 02/16/2000 | CN2364198Y Roller bit |
| 02/16/2000 | CN1244623A Drilling rig capable of resisting very high pressure |
| 02/15/2000 | US6024168 Wellborne mills & methods |
| 02/09/2000 | EP0978627A2 A method of determining characteristics of a rotary drag-type drill bit |
| 02/09/2000 | CN2363042Y Anchor eye diamond drill for hard rock |
| 02/08/2000 | US6022176 Tool bit with marking member |
| 02/08/2000 | US6021859 Stress related placement of engineered superabrasive cutting elements on rotary drag bits |
| 02/08/2000 | US6021858 Drill bit having trapezium-shaped blades |
| 02/08/2000 | US6021857 Drill bit |
| 02/08/2000 | US6021855 Method, drilling tool and rock drill bit for transferring impact energy from a top hammer unit |
| 02/03/2000 | WO2000005481A1 Drilling apparatus with a radially displaceable reamer as well as a reamer and a pilot bit |
| 02/02/2000 | EP0976444A2 A diamond sintered compact and a process for the production of the same |
| 02/02/2000 | CN2361416Y Percussion bit |
| 02/01/2000 | US6019434 Point attack bit |
| 01/26/2000 | EP0974730A2 Rotary dag bit |
| 01/26/2000 | EP0974729A1 A screw drilling device |
| 01/20/2000 | WO2000003114A1 Rotary cone drill bit with machined cutting structure and method |
| 01/19/2000 | EP0972908A2 A method of determining characteristics of a rotary drag-type drill bit |
| 01/19/2000 | CN2359447Y Hard alloy wedge chisel drilling bit |
| 01/19/2000 | CN1241666A Auger bin for deposited-pile hole |
| 01/13/2000 | WO2000001918A1 Abrasive body |
| 01/13/2000 | WO2000001917A1 Abrasive body |
| 01/13/2000 | WO2000001916A1 Abrasive body |
| 01/12/2000 | EP0824626B1 Drilling tool |
| 01/12/2000 | CN1241237A Rock drill |
| 01/12/2000 | CN1240870A Roll-slide combined bearing |
| 01/05/2000 | EP0862678B1 Drill bit |
| 01/05/2000 | EP0843772A4 Cutting tool for drilling concrete, aggregate or masonry |
| 01/04/2000 | US6011232 Manufacture of elements faced with superhard material |
| 01/04/2000 | US6009963 Superabrasive cutting element with enhanced stiffness, thermal conductivity and cutting efficiency |
| 01/04/2000 | US6009962 Impregnated type rotary drill bits |
| 01/04/2000 | US6009961 Underreamer with turbulence cleaning mechanism |
| 01/04/2000 | CA2008169C Hollow drilling tool |
| 12/29/1999 | EP0967037A2 Polycrystalline diamond compact cutter with interface |
| 12/29/1999 | CN2356139Y Composite sheet tooth drill bit |
| 12/29/1999 | CN2356138Y Tri-cone rotary drill bit for hole enlarging |
| 12/29/1999 | CN1047819C Method for making chisel bit for drill rock |
| 12/28/1999 | US6006846 Cutting element, drill bit, system and method for drilling soft plastic formations |
| 12/28/1999 | US6006845 Rotary drill bits for directional drilling employing tandem gage pad arrangement with reaming capability |
| 12/28/1999 | US6006844 Method and apparatus for simultaneous coring and formation evaluation |
| 12/22/1999 | CN2355096Y Rock drilling bits with uncontinuous edges |
| 12/22/1999 | CN2355095Y Journal bearings for roller cone bits |
| 12/22/1999 | CN2355094Y Disc roller cone bits |
| 12/22/1999 | CN2355092Y Hydraulic impulsive pressurizer for drill |
| 12/21/1999 | USRE36452 Composite seal for rotary cone rock bits |
| 12/21/1999 | US6003953 Cutter head with cutting members that rotate relative to each other |
| 12/21/1999 | US6003623 Cutters and bits for terrestrial boring |
| 12/16/1999 | WO1999064713A1 A drilling tool |
| 12/14/1999 | US6000483 Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped |
| 12/14/1999 | US6000312 Carbide cutting insert |
| 12/08/1999 | EP0962621A2 Preform cutting elements for rotary drill bits |
| 12/08/1999 | EP0962620A2 A two-stage drill bit |
| 12/08/1999 | EP0962431A1 Methods of treating preform elements |
| 12/08/1999 | EP0862680A4 A sleeve for orientating a tool |
| 12/08/1999 | CN2352665Y Two stage cutting type PDC drilling bit |