| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 05/24/2005 | CA2261491C Cutting element with improved polycrystalline material toughness and method for making same |
| 05/24/2005 | CA2167676C Method for controlling the head of a drilling or core-drilling device and apparatus for carrying out this method |
| 05/19/2005 | WO2005045177A1 Make-up control system for tubulars |
| 05/19/2005 | WO2005044492A1 Method and bore crown for drilling a hole, particularly a tap hole in a furnace |
| 05/19/2005 | US20050103533 Cutting element retention apparatus for use in steel body rotary drill bits, steel body rotary drill bits so equipped, and method of manufacture and repair therefor |
| 05/19/2005 | US20050103531 Bearing seal |
| 05/19/2005 | US20050103530 Bits for use in drilling with casing and method of making the same |
| 05/19/2005 | DE10357505A1 Anschlussstück mit verbesserter Struktur zur Verwendung mit einem Kernbohrer sowie Kernbohrer und Anschlussstückbaugruppe mit einem derartigen Anschlussstück Fitting with an improved structure for use with a core drill and core drill and connector assembly with such a connecting piece |
| 05/19/2005 | DE10344353A1 Bohrvorrichtung und Verfahren zum Verdrängungsbohren im Boden Drilling apparatus and method for displacement drilling in the ground |
| 05/18/2005 | CN1617974A 钻孔工具 Drilling Tools |
| 05/18/2005 | CN1617973A Steerable rotary drill bit assembly with pilot bit |
| 05/18/2005 | CN1617781A Fixing arrangement |
| 05/17/2005 | US6892836 Cutting element having a substrate, a transition layer and an ultra hard material layer |
| 05/17/2005 | US6892831 Method and apparatus for boring through a solid material |
| 05/17/2005 | US6892828 Nutating single cone drill bit |
| 05/17/2005 | CA2365710C Method and apparatus for drilling and completing a well |
| 05/12/2005 | US20050098358 Anchoring drill bit, system and method of anchoring |
| 05/12/2005 | US20050098357 Expanded coverage carbide compact |
| 05/12/2005 | DE202004019168U1 Drill for earth-moving, mining has feed tubes that can be assembled, advanced, drill tool reversibly connected to last tube with external size less than/equal to tube internal diameter or can be changed so tool can be moved out of tube |
| 05/11/2005 | EP1259699B1 Rock drill |
| 05/11/2005 | CN2698954Y Expanding bucket for drilling and pouring expanded-base pile |
| 05/11/2005 | CN2698953Y Tubular inner cutting type drag bit |
| 05/11/2005 | CN2698952Y Regular conical inner cutting type drag bit |
| 05/11/2005 | CN1200790C Method of processing blades |
| 05/10/2005 | US6890250 Diamond blade having rim type cutting tip for use in grinding or cutting apparatus |
| 05/10/2005 | CA2402142C Drill bit |
| 05/06/2005 | WO2004099550B1 Drilling aparatus |
| 05/06/2005 | WO2004092531B1 Nutating single cone drill bit |
| 05/06/2005 | CA2544093A1 Fluid jet drilling tool |
| 05/05/2005 | US20050096847 Methods for modeling, designing, and optimizing the performance of drilling tool assemblies |
| 05/05/2005 | US20050092526 Expandable eccentric reamer and method of use in drilling |
| 05/04/2005 | EP1528221A1 Expandable eccentric reamer and method of use in drilling |
| 05/04/2005 | EP1527252A1 Drill, in particular masonry drill |
| 05/04/2005 | EP1527251A1 Cutting tools with two-slope profile |
| 05/04/2005 | DE10234338B4 Vorrichtung zum Vortreiben von Bohrungen im Erdreich Apparatus for propelling holes in the ground |
| 05/04/2005 | DE10234337B4 Vorrichtung zum Vortreiben von Bohrungen im Erdreich Apparatus for propelling holes in the ground |
| 05/04/2005 | CN2697298Y Heat-resisting combined roller bit |
| 05/04/2005 | CN1611740A Drill bit |
| 05/04/2005 | CN1199769C Drill bit |
| 05/03/2005 | US6886645 Liquid seal for wet roof bit |
| 05/03/2005 | US6886633 Bore hole underreamer |
| 04/28/2005 | WO2005038189A1 Nozzle unit and method for excavating a hole in an object |
| 04/28/2005 | US20050089440 Braze alloy |
| 04/28/2005 | US20050087370 Increased projection for compacts of a rolling cone drill bit |
| 04/28/2005 | US20050087369 Bowed crests for milled tooth bits |
| 04/28/2005 | CA2542413A1 Nozzle unit and method for excavating a hole in an object |
| 04/27/2005 | EP1525370A2 Device for advancing drillings in the ground |
| 04/27/2005 | EP1334259A4 Load responsive hydrodynamic bearing |
| 04/27/2005 | CN2695600Y Deformed corona hard alloy teeth |
| 04/26/2005 | US6883624 Multi-lobed cutter element for drill bit |
| 04/26/2005 | US6883623 Earth boring apparatus and method offering improved gage trimmer protection |
| 04/26/2005 | CA2305742C Small disc cutters, and drill bits, cutterheads, and tunnel boring machines employing such rolling disc cutters |
| 04/26/2005 | CA2262264C Cutting element with interlocking feature |
| 04/26/2005 | CA2260612C Pneumatic hammer drilling assembly for use in directional drilling |
| 04/21/2005 | US20050084349 Drilling tool |
| 04/21/2005 | US20050082093 Multiple diameter cutting elements and bits incorporating the same |
| 04/20/2005 | EP1285145B1 Apparatus for directional drilling |
| 04/20/2005 | CN1608166A Drill bit |
| 04/19/2005 | US6880650 Advanced expandable reaming tool |
| 04/19/2005 | US6880649 Apparatus and method for directional drilling of holes |
| 04/19/2005 | US6880648 Apparatus and method for directional drilling of holes |
| 04/19/2005 | CA2219985C Cantilevered hole opener |
| 04/14/2005 | WO2005032788A1 A drill bit for thin-wall work piece |
| 04/14/2005 | WO2004094767A3 Expanded liner system and method |
| 04/14/2005 | US20050080595 Methods for designing fixed cutter bits and bits made using such methods |
| 04/14/2005 | US20050077092 Arcuate-shaped inserts for drill bit |
| 04/14/2005 | US20050077091 Cutting element structure for roller cone bit |
| 04/14/2005 | US20050077090 Apparatus and method for selective laser-applied cladding |
| 04/14/2005 | US20050077089 Cryogenically treated drilling and mining equipment |
| 04/14/2005 | US20050077087 Bearing and lubrication system for earth boring bit |
| 04/14/2005 | US20050077084 Make-up control system for tubulars |
| 04/13/2005 | EP1354118A4 Backreamer |
| 04/13/2005 | EP0670950B2 Drilling apparatus |
| 04/12/2005 | US6879947 Method for optimizing the bit design for a well bore |
| 04/12/2005 | US6878447 Polycrystalline diamond partially depleted of catalyzing material |
| 04/12/2005 | US6877570 Drilling with casing |
| 04/12/2005 | CA2357754C Lining removal method, system and components thereof |
| 04/12/2005 | CA2349398C Cutting structure for roller cone drill bits |
| 04/12/2005 | CA2164442C Apparatus for use in a wellbore |
| 04/07/2005 | US20050072602 Integral bit retention system |
| 04/07/2005 | US20050072601 Roller cone bits with wear and fracture resistant surface |
| 04/06/2005 | EP1339939A4 A drilling tool used in horizontal drilling applications |
| 04/06/2005 | EP1255909B1 Drill bit, hard member, and bit body |
| 04/06/2005 | CN2690557Y Large diameter well drill bit |
| 04/06/2005 | CN2690556Y Multihead screw drilling and grinding drilling machine |
| 04/06/2005 | CN2690555Y Guide stable buffer of hole enlarging while drilling |
| 04/06/2005 | CN2690554Y Rock bit grease pressure compensator |
| 04/05/2005 | US6874388 Method for hardfacing roller cone drill bit legs |
| 04/05/2005 | CA2304966C Bi-center bit adapted to drill casing shoe |
| 03/31/2005 | WO2005028806A1 Rotary drill bit |
| 03/31/2005 | WO2005028805A1 Steerable bit assembly and methods |
| 03/31/2005 | WO2004092531A3 Nutating single cone drill bit |
| 03/31/2005 | US20050067196 Shaped inserts with increased retention force |
| 03/30/2005 | EP1519000A1 Displacement drilling tool and method of use |
| 03/30/2005 | CN2688966Y Anti-locking and abra sion-proof bearing pair |
| 03/30/2005 | CN2688866Y Tri-cone rotary drilling bit bearing structure with solid lubricant |
| 03/30/2005 | CN2688865Y Assembled diamond bits |
| 03/30/2005 | CN2688864Y Jointing tooth for tri-cone rotary drilling bit |
| 03/30/2005 | CN1602385A Boring head and a roller cutter and a saddle for a boring head for rotary drilling |
| 03/30/2005 | CN1601044A Drilling tool of the displacing type in soil and method |