| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 07/29/2004 | US20040144572 Flightless rock auger for use with pressure drills with quick attachment and method of use |
| 07/29/2004 | CA2512737A1 Cutting ring for disk rolls of partial and/or full cutting machines |
| 07/28/2004 | EP0996808B1 Drill bit nozzle and method of attachment |
| 07/28/2004 | CN2628585Y Grouting stirring enlarging bottom drilling rod central pump concrete pouring apparatus |
| 07/28/2004 | CN1159142C Twist-drill |
| 07/27/2004 | US6766870 Mechanically shaped hardfacing cutting/wear structures |
| 07/27/2004 | US6766859 Wellbore liner system |
| 07/22/2004 | WO2004061261A1 Drilling with casing |
| 07/22/2004 | US20040143427 Method for simulating drilling of roller cone bits and its application to roller cone bit design and performance |
| 07/22/2004 | US20040141865 Selecting an ultra hard material which is not fully densified;selecting a substrate, placing ultra hard material over substrate; processing resulting assembly of substrate and ultra-hard material for full densification and metallurgical joining |
| 07/22/2004 | US20040140133 Fracture and wear resistant compounds and down hole cutting tools |
| 07/22/2004 | US20040140132 Polycrystalline diamond with improved abrasion resistance |
| 07/22/2004 | US20040140130 Roller-cone bits, systems, drilling methods, and design methods with optimization of tooth orientation |
| 07/22/2004 | US20040140128 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 07/22/2004 | US20040140126 Coring Bit With Uncoupled Sleeve |
| 07/22/2004 | DE10300624A1 Schneidring für Diskenrollen von Teil- und/oder Vollschnittmaschinen Olive for Disk roles of partial and / or full-face machines |
| 07/21/2004 | EP1438483A1 System for lining a section of a wellbore |
| 07/21/2004 | EP1438479A2 Liquid seal for wet roof bit |
| 07/21/2004 | CN2627194Y Single cone bit waterpower arrangement |
| 07/21/2004 | CN2627193Y Back taper barrel tungsten carbide insert bit |
| 07/21/2004 | CN2627192Y Pig-shaped alloy tooth for rock bit |
| 07/21/2004 | CN2627191Y Spoon-shaped alloy tooth for rock bit |
| 07/21/2004 | CN2627190Y Rock bit with tooth slot protection teeth |
| 07/20/2004 | US6763902 Rockbit with attachable device for improved cone cleaning |
| 07/15/2004 | US20040134688 Drill bit |
| 07/15/2004 | US20040134687 Expandable reamer apparatus for enlarging boreholes while drilling and methods of use |
| 07/15/2004 | US20040134668 Downhole cutting tool and method |
| 07/15/2004 | DE20304403U1 Drill bit for forming borehole in e.g. reinforced concrete structure, has cutting edge provided with two tungsten carbide tips such that tungsten carbide tips have body sections which are made from non metallic materials such as ceramics |
| 07/15/2004 | DE10357810A1 Drehbarer Einsatz mit einer elastischen, spielbehafteten Sicherungshülse Rotatable insert with an elastic, with play securing sleeve |
| 07/15/2004 | DE10258963A1 Hydraulic drilling of well borehole in ground containing coarse clays, cuts layer from borehole walls mechanically when pulling drillstring, with continued flow of drilling fluid |
| 07/14/2004 | CN2625559Y PDC reaming drill |
| 07/14/2004 | CN2625558Y Multiple roller bit with low resistance gage structure |
| 07/14/2004 | CN2625557Y Roller bit with reinforced active gage structure |
| 07/14/2004 | CN2625556Y Tooth slot reinforced roller bit |
| 07/13/2004 | CA2124393C Method of making an abrasive compact |
| 07/08/2004 | WO2004057148A1 Bit assembly |
| 07/08/2004 | US20040129456 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 07/08/2004 | US20040129420 Milling tool insert |
| 07/08/2004 | DE10360707A1 Rock drill used e.g. in hammer drills for drilling rock comprises a drill head having at its end a trapezoidal or X-shaped receiving groove for a cutting element |
| 07/07/2004 | CN2623865Y Steel tooth and compound tooth pineapple bit |
| 07/07/2004 | CN1510247A Grinding method and system for gear drilling bit bearing |
| 07/07/2004 | CN1510246A Drilling bit of positive and negative circulation drilling bit |
| 07/07/2004 | CN1510245A Visual device of PDC drilling bit flow field |
| 07/07/2004 | CN1156641C Drilling tool |
| 07/01/2004 | US20040124011 Expandable bit with a secondary release device |
| 07/01/2004 | US20040123984 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 07/01/2004 | DE10260113A1 Gesteinsbohrer Rock drill |
| 06/30/2004 | EP1169519B1 Bearing capacity enhancement for piling applications |
| 06/30/2004 | CN2622376Y Bull step shaped three-cutter drill bit |
| 06/30/2004 | CN2622375Y Borehole enlarging bit for anchor rod, anchor cable and pile in civil engineering |
| 06/29/2004 | CA2217751C O-ring seal with lubricant additives for rock bit bearings |
| 06/24/2004 | US20040118616 Structure for polycrystalline diamond insert drill bit body and method for making |
| 06/24/2004 | US20040118615 Rotatable bit having a resilient retainer sleeve with clearance |
| 06/24/2004 | US20040118613 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 06/24/2004 | US20040118611 Drilling a borehole |
| 06/24/2004 | US20040118609 Drilling with mixed tooth types |
| 06/23/2004 | EP1431511A1 Rock drill |
| 06/23/2004 | EP1430980A1 Stone drill |
| 06/22/2004 | US6752223 Roller cone bit with improved seal gland design |
| 06/17/2004 | WO2003086042A3 Method of cleaning hole diggers and spot cultivators and hole digger cleaning device |
| 06/17/2004 | US20040115435 High Volume Density Polycrystalline Diamond With Working Surfaces Depleted Of Catalyzing Material |
| 06/17/2004 | US20040112650 Hard material insert with polycrystalline diamond layer |
| 06/17/2004 | US20040112648 Drill blades for drill bit |
| 06/17/2004 | US20040112647 Masonry drilling tool |
| 06/17/2004 | US20040112639 Drilling with casing |
| 06/17/2004 | US20040112638 Percussion drill head |
| 06/17/2004 | US20040112587 Expandable downhole tool |
| 06/17/2004 | US20040112359 Brazed diamond tools and methods for making the same |
| 06/16/2004 | CN1504613A Forming method for water-proof pile fender and screw drill therefor |
| 06/15/2004 | US6749033 Polycrystalline diamond partially depleted of catalyzing material |
| 06/10/2004 | WO2004048744A2 Apparatus and method for drilling and reaming a borehole |
| 06/10/2004 | US20040108145 Preformed tooth for tooth bit |
| 06/10/2004 | US20040108143 Pile reamer with spoil container |
| 06/10/2004 | US20040108142 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 06/10/2004 | US20040108138 Hydraulic Optimization of Drilling Fluids in Borehole Drilling |
| 06/10/2004 | US20040108110 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 06/09/2004 | CN2619973Y Integrated drilling expanding pallet pile |
| 06/09/2004 | CN1502784A Method for changing junk slot shape of PDC drill |
| 06/09/2004 | CN1502750A Method for pile formation by hole-drilling and pressure-injecting mortar and used device |
| 06/08/2004 | US6745858 Adjustable earth boring device |
| 06/08/2004 | US6745645 Enhanced gage protection for milled tooth rock bits |
| 06/03/2004 | WO2004046505A2 Bottomhole assembly |
| 06/03/2004 | WO2004046496A1 Bit assembly for a hammering drill |
| 06/03/2004 | WO2004029310A3 Molten braze-coated superabrasive particles and associated methods |
| 06/03/2004 | US20040105806 Polycrystalline diamond partially depleted of catalyzing material |
| 06/03/2004 | US20040105728 Device for producing bored piles |
| 06/03/2004 | US20040104053 Methods for optimizing and balancing roller-cone bits |
| 06/03/2004 | US20040104050 Method for drilling and drilling apparatus |
| 06/03/2004 | US20040103757 Method of manufacturing PDC cutters with chambers or passages |
| 06/03/2004 | CA2506605A1 Bit assembly for a hammering drill |
| 06/01/2004 | US6742611 Laminated and composite impregnated cutting structures for drill bits |
| 06/01/2004 | US6742610 Rock drill |
| 06/01/2004 | US6742608 Rotary mine drilling bit for making blast holes |
| 06/01/2004 | US6742607 Fixed blade fixed cutter hole opener |
| 05/27/2004 | WO2002063104A3 Pile reamer with spoil container |
| 05/27/2004 | US20040099448 Sub-reamer for bi-center type tools |
| 05/27/2004 | DE202004004799U1 Drill has shaft with flutes and tapered tip section with variably spaced cutting teeth |
| 05/26/2004 | CN2617912Y Drill bits for casting, stirring and bottom expanding for bored slurry-filling piles |
| 05/26/2004 | CN2617911Y Complex conic assembled drill bits |
| 05/26/2004 | CN2617910Y Mixing pile drilling bit with variable dimensions |